CN218953094U - Opening and closing door - Google Patents

Abstract

The utility model discloses an opening and closing door, which comprises a door body, a driving piece, a first door and a buffer device, wherein the first door is provided with a first opening and closing seat; the door body is provided with a first closing position and an opening position; the driving piece is arranged on the door body; the first door is arranged on the door body in a sliding manner, and can slide between a first closing position and an opening position; the buffer device comprises an elastic piece, one end of the elastic piece acts on the first door, the other end of the elastic piece acts on the driving piece, and the driving piece drives the first door to slide from a first closed position to an open position through the elastic piece. According to the door disclosed by the utility model, the hard limit is not required to be carried out by using the limiting block, so that the collision deformation of the door during door opening can be reduced.

Description

Opening and closing door

Technical Field

The utility model relates to a closing device, in particular to an opening and closing door.

Background

The existing automatic opening and closing fire door is opened and closed by using a cylinder matched with a linear guide rail or a sliding groove, when the stroke of the cylinder is selected, the cylinder is required to be larger than the stroke of the door, and the redundant stroke is generally hard limited, namely, the stop block is used for stopping the continuous movement of the door after the stroke of the door is reached, the door and the stop block collide, and the door is easy to deform and damage, so that the service life of the door is influenced.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the opening and closing door, which does not need to use a limiting block for hard limiting and can reduce collision deformation of the door when the door is opened.

According to an embodiment of the utility model, an opening and closing door comprises: the door body is provided with a first closing position and an opening position; the driving piece is arranged on the door body; the first door is arranged on the door body in a sliding manner, and can slide between the first closing position and the opening position; the buffer device comprises an elastic piece, one end of the elastic piece acts on the first door, the other end of the elastic piece acts on the driving piece, and the driving piece drives the first door to slide from the first closing position to the opening position through the elastic piece.

According to the embodiment of the utility model, the opening and closing door has at least the following beneficial effects: the buffer device is arranged to buffer the collision generated when the stroke of the driving piece is larger than the stroke of the door; specifically, when the driving piece drives the first door to move from the first closed position to the initial state of the open position, the elastic piece can drive the first door to move to the open position after a certain deformation under the action of the gravity of the driving piece and the first door, namely, in the initial state, the elastic piece can elastically deform, so that a section of gap is generated between the first door and the movable baffle to buffer the redundant stroke of the air cylinder; in addition, after the driving piece drives the first door to move to the open position from the first closed position, when the first door is at the open position, even if the cylinder still has unnecessary stroke, but under the effect of the driving piece, can make the elastic piece continue to warp, on the one hand, the elastic piece takes place deformation, produce the removal, make the movable rod of driving piece can continue to move, conveniently accomplish the whole stroke of driving piece, on the other hand, the elastic piece has absorbed the dynamics that the driving piece applyed to the first door at deformation in-process, prevent that the driving piece from continuing to drive the first door and remove to the direction of opening the door, produce more violent collision, the collision dynamics of first door and the door body has been reduced, and the elasticity that the elastic piece accumulated increases, offset the pulling force of driving piece gradually, play buffering energy-absorbing effect.

According to some embodiments of the utility model, the buffer device further comprises a sliding column, a movable baffle and a mounting bracket, wherein the mounting bracket is arranged on the first door, the sliding column is arranged between the mounting bracket and the first door, the movable baffle is sleeved on the sliding column, the driving piece acts on one end of the elastic piece through the movable baffle, and the other end of the elastic piece acts on the first door through the mounting bracket.

According to some embodiments of the utility model, the door further comprises a traction rope and a pulley device, one end of the traction rope is connected with the door body, the traction rope is wound on the pulley device, the other end of the traction rope is connected with the movable baffle, and the driving piece drives the traction rope to move through the pulley device.

According to some embodiments of the utility model, the pulley device comprises a first movable pulley, a second movable pulley and a first fixed pulley, wherein the first movable pulley and the second movable pulley are both connected with the output end of the driving piece, the first fixed pulley is connected with the door body, and the traction rope is sequentially wound around the first movable pulley, the first fixed pulley and the second movable pulley and then connected with the movable baffle.

According to some embodiments of the utility model, the pulley device further comprises a redirecting pulley, the redirecting pulley is arranged on the door body, and the traction rope is sequentially wound around the first movable pulley, the first fixed pulley, the second movable pulley and the redirecting pulley and then connected with the movable baffle.

According to some embodiments of the utility model, the door further comprises a second door, the door body is provided with a second closing position, the second closing position is located between the first closing position and the opening position, the second door is slidably arranged on the door body, and the second door can slide between the second closing position and the opening position; the direction from the first closing position to the opening position is a door opening direction, and when the first door slides along the door opening direction, the first door can be abutted to and drive the second door to slide along the door opening direction.

According to some embodiments of the utility model, the second door is provided with a second door ear, the door body is provided with a second limiting portion, the direction from the opening position to the first closing position is a closing direction, and when the second door slides along the closing direction, the second door ear is used for abutting against the second limiting portion to limit the second door in the second closing position.

According to some embodiments of the utility model, the door body is provided with a third closing position, the third closing position is located between the second closing position and the opening position, the third door is arranged on the door body in a sliding manner, and the third door can slide between the third closing position and the opening position; when the first door slides along the door opening direction, the first door or the second door can abut against and drive the third door to slide along the door opening direction together.

According to some embodiments of the utility model, the third door is provided with a third door ear, the door body is provided with a third limiting portion, the direction from the opening position to the first closing position is a closing direction, and when the third door slides along the closing direction, the third door ear is used for abutting against the third limiting portion to enable the third door to be in the third closing position.

According to some embodiments of the utility model, the door further comprises a plastic strip disposed on a side of the first door adjacent to the second door and/or on a side of the second door adjacent to the first door.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of an overall assembly of an opening and closing door according to an embodiment of the present utility model;

FIG. 2 is a schematic structural view of a damper of the opening/closing door shown in FIG. 1;

fig. 3 is a schematic cross-sectional structure of the buffering device shown in fig. 2.

Reference numerals:

the door body 100, the sliding column 110, the second limiting part 120 and the third limiting part 130;

a driving member 200, a housing 210, a movable rod 220;

a first door 300, a first sliding sleeve 310;

a second door 400, a second sliding sleeve 410, a second door ear 420;

a third door 500, a third sliding sleeve 510, and a third door ear 520;

the buffer device 600, the elastic member 610, the sliding column 620, the movable barrier 630, the mounting bracket 640, the fixed barrier 641, the case 642;

a traction rope 700;

pulley arrangement 800, first traveling block 810, second traveling block 820, first fixed block 830, and diverting block 840.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "tip", "inner", "outer", "axial", "radial", "circumferential", etc., are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model. In the description of the present utility model, the sidewall means a left sidewall and/or a right sidewall.

In the description of the present utility model, the meaning of "plurality" is two or more, "greater than", "less than", "exceeding" and the like are understood to not include the present number, and "above", "below", "within" and the like are understood to include the present number. If any, the terms "first," "second," and the like are used merely for distinguishing between technical features, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, it should be understood that "a is disposed on B", and the connection relationship or positional relationship between a and B is expressed without representing that a is necessarily disposed above B.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, removably connected, movably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The terms "bolted" and "screwed" may be equally substituted. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.

It should be understood that a plurality of similar features in the present utility model are only distinguished by different prefixes, so that in the present utility model, the combination of such similar features is represented by feature names that are not prefixed (or feature names that are partially prefixed).

Referring to fig. 1, 2 and 3, the opening and closing door according to the embodiment of the present utility model includes a door body 100, a driving member 200, a first door 300 and a buffering device 600.

The door body 100 is provided with a first closing position and an opening position. The door body 100 is a member provided with an opening; the door 100 may be a separate component or may be part of other devices, such as a door-like component on a lithium battery-based component device.

The driving member 200 is provided on the door body 100. The driving member includes a housing 210 and a movable rod 220, the movable rod 220 is slidably coupled within the housing 210, and the housing 210 is coupled to the door 100. It should be understood that, in the present embodiment, the driving member 200 is a cylinder; the cylinder body can be a cylinder, a hydraulic cylinder, an electric cylinder and the like; the cylinder body includes a housing 210 and a movable rod 220, and the movable rod 220 can stretch and retract in the housing 210 under the action of external power, so as to drive other parts connected to the movable rod 220 to move, wherein the external power can correspond to the corresponding driving parts such as air pressure, hydraulic pressure, electric power and the like.

The first door 300 is slidably coupled to the door body 100, i.e., the first door 300 is slidably disposed on the door body 100, and the first door 300 is capable of sliding between a first closed position and an open position. It should be understood that, in the present utility model, the open position and the close position each represent a specific spatial position; the door is in a certain open or closed position, i.e. the door is in a certain position, i.e. the door is in the spatial position. It will be appreciated that in this embodiment the open position is relatively large to accommodate a stack of doors, while the closed position is small to accommodate a particular door.

The buffer device 600 includes an elastic member 610, one end of the elastic member 610 acts on the first door 300, the other end of the elastic member 610 acts on the driving member 200, and the driving member 200 drives the first door 300 to slide from a first closed position to an open position through the elastic member 610, wherein a direction from the first closed position to the open position is a door opening direction; the elastic member 610 deforms under the driving of the driving member 200, and the elastic member transmits the acting force of the driving member 200 to the first door 300, so that the first door 300 is driven by the driving member 200 to slide to the open position, and then a buffering effect is achieved. It should be understood that the elastic member 610 may be a general spring, a disc spring, an elastic sheet, an elastic plastic member, an air spring, or the like. It should be understood that in this embodiment, the door opening direction is an upward direction, and the door closing direction is a downward direction.

The stroke of the first door 300 is the distance between the first closing position and the opening position, so the stroke of the driving member needs to be equal to or greater than the stroke of the first door 300 to ensure that the first door 300 is normally and completely opened, in practice, the two strokes are absolutely equal, and therefore, the stroke of the driving member can only be set to be greater than the stroke of the door so as to meet the use requirement, so when the driving member drives the first door 300 to move from the first closing position to the opening position and the first door 300 stops at the opening position, the driving member still has the tendency of driving the first door 300 to move continuously, and the first door 300 can collide with the door body 100 or the limiting block strongly; the utility model buffers the contact generated when the stroke of the driving piece is larger than the stroke of the door by arranging the buffer device 600; specifically, when the driving member drives the first door 300 to move from the first closed position to the initial state of the open position, the elastic member can drive the first door 300 to move to the open position after a certain deformation under the action of the gravity of the driving member and the first door, i.e. in the initial state, the elastic member will elastically deform, so that a gap is generated between the first door 300 and the movable baffle to buffer the redundant travel of the air cylinder; in addition, after the driving piece drives the first door 300 to move from the first closed position to the open position, when the first door 300 is in the open position, even if the cylinder has an extra stroke, under the action of the driving piece, the elastic piece 610 can be continuously deformed, on one hand, the elastic piece 610 is deformed and moves, so that the movable rod 220 of the driving piece can continuously move, the whole stroke of the driving piece is conveniently completed, on the other hand, the elastic piece 610 absorbs the force applied to the first door 300 by the driving piece in the deformation process, the driving piece is prevented from continuously driving the first door 300 to move towards the door opening direction, more severe collision is generated, the collision force of the first door 300 and the door body 100 is reduced, the elastic force accumulated by the elastic piece 610 is increased, the tensile force of the driving piece is gradually counteracted, and the buffering and energy absorbing effects are achieved.

It should be noted that, the gap between the first door 300 and the movable baffle may be calculated according to the mechanical relationship between the dead weight of the first door 300 and the elastic coefficient of the elastic member, that is, the gap between the first door 300 and the movable baffle may be adjusted by adjusting the elastic coefficient of the elastic member when the dead weight of the first door 300 is fixed, so as to flexibly set the buffer stroke.

It should be understood that in the utility model, the driving piece is provided to drive the opening and closing door to open, and the closing of the opening and closing door can be manual closing or automatic closing, such as by providing another air cylinder to drive the closing, such as by self weight of the door, and such as by providing a balancing weight, a rope, etc. to drive the door to close automatically.

Referring to fig. 1, 2 and 3, in some embodiments of the present utility model, the buffering device 600 further includes a sliding post 620, a movable barrier 630 and a mounting bracket 640, the mounting bracket 640 is disposed on the first door 300, the sliding post 620 is disposed between the mounting bracket 640 and the first door 300, the movable barrier 630 is sleeved on the sliding post 620, the driving member 200 acts on one end of the elastic member 610 through the movable barrier 630, and the other end of the elastic member 610 acts on the first door 300 through the mounting bracket 640.

The mounting bracket 640 is a mounting member of the damper 600, and facilitates the mounting of the damper 600. Specifically, in the present embodiment, the mounting bracket 640 includes a fixed baffle 641, one end of the sliding column 620 is connected to the first door 300, the other end of the sliding column 620 is connected to the fixed baffle 641, the movable baffle 630 is slidably connected to the sliding column 620, the movable rod 220 is in transmission connection with the movable baffle 630, one end of the elastic member 610 is used for abutting against the movable baffle 630, and the other end of the elastic member 610 is used for abutting against the fixed baffle 641.

When the buffering device 600 buffers, the movable rod 220 drives the movable barrier 630 to slide along the sliding column 620 to approach the fixed barrier 641, thereby compressing the elastic member 610 between the movable barrier 630 and the fixed barrier 641. It should be understood that in this embodiment, the elastic member 610 is a spring, the spring is sleeved on the sliding column 620, and meanwhile, the movable baffle 630 is sleeved on the sliding column 620, so that the position of the spring can be conveniently fixed, the movable baffle 630 is ensured to move stably, and can only move in the up-down direction and not shake randomly. It should be understood that the cross-sectional shape of the column part in the present utility model is not limited to a common circle, but may be polygonal, such as square, triangle, rectangle, etc., and the cross-sectional shape of the column may be a combination of various shapes, such as a shape formed by square plus semicircle, such as a playground shape with a runway.

Referring to fig. 1, 2 and 3, in some embodiments of the present utility model, the bracket 640 further includes a housing 642, the housing 642 is disposed on the first door 300, one end of the sliding column 620 is disposed on the first door 300 through a bent portion of the housing 642, the other end is connected to the fixed barrier 641, and the fixed barrier 641 is connected to the housing 642.

The bracket provides the housing 642 structure such that the damper 600 is a separate integral unit, facilitating the entire installation of the damper 600 to the first door 300 or the removal of the damper from the first door 300. It should be appreciated that the housing 642 may be fixedly coupled to the first door 300, such as by welding, etc., and the housing 642 and the first door 300 may be detachably coupled, such as by bolting, snapping, etc.

Referring to fig. 1 and 2, in some embodiments of the present utility model, the door body further includes a traction rope 700 and a pulley device 800, one end of the traction rope 700 is connected to the door body 100, the traction rope 700 is wound around the pulley device 800, the other end of the traction rope 700 is connected to the movable barrier 630, and the driving member 200 drives the traction rope 700 to move through the pulley device 800.

By providing the traction rope 700 and the pulley device 800, at least one of the force transmission direction, the force transmission magnitude, and the force application stroke of the movable lever 220 of the driving member can be changed. The force transmission direction is changed, so that the driving piece can be conveniently installed, namely, the driving piece does not need to be installed at a position above the opening position. By changing the force transmission, the sliding speed of the first door 300, that is, the opening speed of the opening and closing door can be controlled, and the collision force between the first door 300 and the door body 100 can be changed. By changing the force acting stroke, the stroke of the driving member can be more in line with the requirement of use, i.e. the theoretical stroke of the driving member for driving the first door 300 to move is slightly larger than the stroke of the first door 300 actually required to move.

Referring to fig. 1 and 2, in some embodiments of the present utility model, the pulley apparatus 800 includes a first movable pulley 810, a second movable pulley 820, and a first fixed pulley 830, the first movable pulley 810 and the second movable pulley 820 are connected to the output end (movable rod 220) of the driving member 200, the first fixed pulley 830 is connected to the door body 100, and the traction rope 700 is sequentially wound around the first movable pulley 810, the first fixed pulley 830, and the second movable pulley 820 and then connected to the movable baffle 630.

In the present embodiment, the stroke of the driving member can be enlarged by providing the first movable pulley 810, the second movable pulley 820, and the first fixed pulley 830; specifically, the stroke of the movable rod 220 of the driving member is one fourth of the stroke at the other end of the traction rope 700, that is, the stroke of the movable rod 220 is one fourth of the stroke of the first door 300 driven to slide, so that a shorter driving member can be selected to meet the requirement of long-stroke door opening. It should be appreciated that the pulley arrangement 800 may further change the ratio of the two strokes by increasing or decreasing the number of traveling pulleys and fixed pulleys.

Referring to fig. 1 and 2, in some embodiments of the present utility model, the pulley device 800 further includes a diverting pulley 840, the diverting pulley 840 is disposed on the door body 100, and the traction rope 700 sequentially passes around the first movable pulley 810, the first fixed pulley 830, the second movable pulley 820, and the diverting pulley 840 and then is connected to the movable barrier 630.

It will be appreciated that the bend pulley 840 may be provided in a plurality of ways to bend the traction wire a plurality of times, which may facilitate the placement of the driving member, i.e., the driving member may be placed in any orientation.

Referring to fig. 1, in some embodiments of the present utility model, a door body 100 is provided with a spool 110, and a first door 300 is provided with a first sliding sleeve 310, the first sliding sleeve 310 being slidably coupled to the spool 110.

By providing a sliding sleeve and a sliding post 110 in sliding connection, the sliding post 110 has a certain positioning function besides being used for sliding the sliding sleeve, so that the sliding direction of the first door 300 is restrained, and the first door is not easy to clamp.

Referring to fig. 1, in some embodiments of the present utility model, the door body 100 is provided with a second closing position between the first closing position and the opening position, the second door 400 is slidably provided on the door body 100, and the second door 400 is slidably provided between the second closing position and the opening position; when the movable rod 220 drives the first door 300 to slide along the door opening direction, the first door 300 can abut against and drive the second door 400 to slide along the door opening direction. The opening and closing door may be provided with a plurality of doors, which are combined to close the opening of the door body 100. When the opening and closing door is opened, the door needs to move to avoid the opening space, and if the opening is larger, the larger the space the door needs to avoid, namely, the more space is needed to install the opening and closing door; by means of the combined structure of the plurality of doors, when the opening and closing doors are opened under the condition of larger openings, the plurality of doors can be mostly overlapped at the opening positions, so that the installation space requirement of the opening and closing doors is reduced, and the practical application of the opening and closing doors is facilitated. In another aspect, the original door can be divided into a plurality of sections from the middle, when the door body 100 is normally closed, the original door can be regarded as a whole, which is equivalent to a normal door, when the door body 100 is opened, the doors are folded and overlapped to avoid the opening, and the doors are folded and overlapped to reduce the occupied space of the doors, save the size of the opening position and integrally reduce the size of the door body 100.

It should be appreciated that the first lifting portion may be disposed at the bottommost end of the first door 300, i.e., the end far away from the second door 400, and the first lifting portion approaches and abuts the second door 400 when the first door 300 is lifted to the second closed position during the lifting of the first door 300, thereby driving the second door 400 to be lifted together.

Referring to fig. 1, in some embodiments of the present utility model, the second door 400 is provided with a second door ear 420, the door body 100 is provided with a second limiting portion 120, the direction from the open position to the first closed position is a door closing direction, and when the second door 400 slides in the door closing direction, the second door ear 420 is used to abut against the second limiting portion 120, thereby limiting the second door 400 in the second closed position.

In this embodiment, the door may be automatically closed by its own weight or by means of a counterweight and by means of a rope to change the direction of gravity of the counterweight, and in order to avoid impact, the first door may be lowered slowly by means of a driving element against the force of gravity. In order to facilitate the resetting of the doors to the positions to be closed, a door lug is arranged on one side of the door, and a limit part is arranged at the corresponding position of the door body 100; specifically, in this embodiment, when the door descends automatically under its dead weight, the door ear is close to and abuts the limiting portion, and the limiting portion can block the door ear for the door can not descend any more. It should be appreciated that the first door 300 may be automatically limited by its connection to the movable rod 220 or by touching the bottom of the door body 100, so that the door ear and limiting structure may not be required, and in some embodiments, the first door 300 may also be provided with the door ear and limiting structure. It should be understood that the buffer device 600 not only relieves the collision impact of the door and the door body 100, but also relieves the collision impact between the door and the door when the door is opened. It is to be understood that the reinforcing plate is generally arranged below the door lugs and the limiting parts, so that the structural strength of the door lugs and the limiting parts is enhanced, and the collision impact force of the door lugs and the limiting parts when the dead weight of the door descends is conveniently counteracted.

Referring to fig. 1, in some embodiments of the present utility model, the door body 100 is provided with a third closing position between the second closing position and the opening position, the third door 500 is slidably provided on the door body 100, and the third door 500 is slidably movable between the third closing position and the opening position; when the first door 300 slides in the door opening direction (when the movable rod 220 drives), the first door 300 or the second door 400 can abut against and drive the third door 500 to slide together in the door opening direction. It should be understood that the door body 100 is provided with an opening, and the door is used to close the opening; in this embodiment, the movable lever 220 can drive the first door 300, the second door 400, and the third door 500 together to move to the open position, thereby completely opening the opening; and when the door is not driven by the movable bar 220, the door descends under the force of gravity, and when the first door 300 is in the first closed position, the second door 400 is in the second closed position, and the third door 500 is in the third closed position, the three doors completely close the opening. It should be understood that according to actual requirements, more doors such as the fourth door and the fifth door can be additionally arranged, and the door ears and the limiting parts can be correspondingly arranged to position and limit.

Referring to fig. 1, in some embodiments of the present utility model, the third door 500 is provided with a third door ear 520, and the door body 100 is provided with a third limiting portion 130, and when the third door 500 slides in the door closing direction, the third door ear 520 is used to abut against the third limiting portion 130 (thereby limiting the third door 500 in the third closing position). The principle of the third door ear 520 and the third limiting portion 130 may refer to the contents of the second door ear 420 and the second limiting portion 120, which are not described herein.

It should be appreciated that the second door 400 may be provided with a second sliding sleeve 410, the second sliding sleeve 410 being slidably connected to the spool 110; the third door 500 may be provided with a third sliding sleeve 510, the third sliding sleeve 510 being slidably connected to the spool 110. It should be understood that, in addition to the sliding connection between the sliding post 110 and the sliding sleeve, a sliding slot may be provided in the door body 100, and the door may be formed by sliding directly or indirectly through a sliding block, a pulley, or the like in the sliding slot.

It should be noted that, the first lifting portion may also drive the third door 500 to rise together in the third closing position, or the second door 400 is provided with the second lifting portion, and the second lifting portion approaches and abuts against the third door 500 to drive the third door 500 to rise together; when the door descends and the door is opened and closed, the lifting part does not block the descending of the door.

Referring to fig. 1, in some embodiments of the present utility model, a plastic strip is further included, the plastic strip being disposed on a side of the first door 300 adjacent to the second door 400 and/or a side of the second door 400 adjacent to the first door 300.

The plastic strip may be provided on the first door 300, in particular, on a side of the first door 300 adjacent to the second door 400; the plastic strip may also be provided on the second door 400, in particular, on a side of the second door 400 adjacent to the first door 300; preferably, the plastic strips may be provided on both the first door 300 and the second door 400, with reference to the above.

In order to ensure the closing effect of the opening of the door body 100, when the opening and closing door is closed, a certain overlapped part is arranged between the doors, the distance between the overlapped parts is very close, and even the parts of the two doors are directly abutted together; therefore, when the door is opened, as the distance between the doors is very short, the doors are easy to rub and abrade when moving, for example, the spraying on the surface of the doors can be rubbed off, and the plastic strips are arranged on the sides of the doors close to each other, so that the friction between metals can not be generated. It should be understood that other doors, such as the third door 500, may be provided with plastic strips. It will be appreciated that the plastic strip extends in the direction of door movement.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (10)

1. An opening and closing door, comprising:

the door body is provided with a first closing position and an opening position;

the driving piece is arranged on the door body;

the first door is arranged on the door body in a sliding manner, and can slide between the first closing position and the opening position;

the buffer device comprises an elastic piece, one end of the elastic piece acts on the first door, the other end of the elastic piece acts on the driving piece, and the driving piece drives the first door to slide from the first closing position to the opening position through the elastic piece.

2. The door of claim 1, wherein the buffer device further comprises a sliding column, a movable baffle and a mounting bracket, the mounting bracket is arranged on the first door, the sliding column is arranged between the mounting bracket and the first door, the movable baffle is sleeved on the sliding column, the driving member acts on one end of the elastic member through the movable baffle, and the other end of the elastic member acts on the first door through the mounting bracket.

3. The door of claim 2, further comprising a pulling rope and a pulley device, wherein one end of the pulling rope is connected with the door body, the pulling rope is wound on the pulley device, the other end of the pulling rope is connected with the movable baffle, and the driving piece drives the pulling rope to move through the pulley device.

4. A door according to claim 3, wherein the pulley means comprises a first movable pulley, a second movable pulley and a first fixed pulley, the first movable pulley and the second movable pulley are connected to the output end of the driving member, the first fixed pulley is connected to the door body, and the traction rope sequentially passes around the first movable pulley, the first fixed pulley and the second movable pulley and then is connected to the movable baffle.

5. The door of claim 4, wherein the pulley device further comprises a redirecting pulley, the redirecting pulley is disposed on the door body, and the traction rope is sequentially wound around the first movable pulley, the first fixed pulley, the second movable pulley and the redirecting pulley and then connected with the movable baffle.

6. The door of claim 1, further comprising a second door, the door body being provided with a second closed position, the second closed position being between the first closed position and the open position, the second door being slidably disposed on the door body, the second door being slidable between the second closed position and the open position; the direction from the first closing position to the opening position is a door opening direction, and when the first door slides along the door opening direction, the first door can be abutted to and drive the second door to slide along the door opening direction.

7. The door of claim 6, wherein the second door is provided with a second door ear, the door body is provided with a second limiting portion, the direction from the open position to the first closed position is a door closing direction, and when the second door slides along the door closing direction, the second door ear is used for abutting against the second limiting portion to limit the second door at the second closed position.

8. The door of claim 6, further comprising a third door, the door body being provided with a third closed position, the third closed position being between the second closed position and the open position, the third door being slidably disposed on the door body, the third door being slidable between the third closed position and the open position; when the first door slides along the door opening direction, the first door or the second door can abut against and drive the third door to slide along the door opening direction together.

9. The door of claim 8, wherein the third door is provided with a third door ear, the door body is provided with a third limiting portion, the direction from the open position to the first closed position is a door closing direction, and when the third door slides along the door closing direction, the third door ear is used for abutting against the third limiting portion to limit the third door to the third closed position.

10. The door of claim 6, further comprising a plastic strip disposed on a side of the first door proximate the second door and/or a side of the second door proximate the first door.

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