Hidden automatic door closing system

Abstract

A hidden type automatic door closing system comprises a fixing column, a roller and a rotating sleeve, the fixing column is fixed relative to an outer door frame or the ground, the end of the rotating sleeve extends along the radial outer side to form a first connecting block and a second connecting block, the connecting position of the second connecting block and the rotating sleeve is provided with a roller groove, and the roller groove is formed in the surface of the end of the rotating sleeve. The first connecting block is connected with the second connecting block. The device has the advantages that the device is simple in structure, and production and installation cost is reduced; 2, the device can reduce the abrasion of parts of the device; and thirdly, external pollutants can be prevented from being accumulated on the door closing device to damage parts. And fourthly, the device can solve the problem of return of both parties. And 5, the device can enable the door body to be located at a normally closed position more stably.

Description

Technical Field

[0001] The utility model relates to the technical field of doors, and in particular to a hidden automatic door closing system. Background Art

[0002] In daily production, there are often many troubles caused by the door body not closing tightly. There are also many devices that can automatically close the door in the prior art. For example: the invention patent with publication number CN103527025A provides an automatic door closing device for a vertical display cabinet glass door. The device is driven by the upper and lower inclined surfaces between the jacking sleeve and the lifting sleeve. Since the door body itself has gravity, it automatically returns to the lowest point of the closed state under the action of the gravity of the door body. This is the embodiment of the common spiral mechanism in mechanics in actual production. The shortcomings of this invention patent are: First, the friction between the jacking sleeve and the lifting sleeve is sliding friction. The friction force of sliding friction on the components is relatively large, which will cause wear to the components over time, and the resistance to returning to close the door is also large, affecting the user experience of the product; Second, the upper and lower inclined surfaces of the patent are disconnected annular structures. Under the action of gravity, they stay at the lowest position in the closed state, which is also the state where the door body is in a limited position. The patent can only open and close the door in one direction. When the door is continuously pushed in the wrong direction of the limit, the force is slightly greater and the door body may collapse. Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Utility Model Content

[0003] The utility model provides a hidden automatic door closing system, the invention aims: 1. It has a more stable automatic door closing function. 2. The utility model significantly reduces the wear of components. 3. The automatic door closing device of the utility model is hidden inside the door leaf, which can prevent external pollutants from accumulating on the door closing device and causing damage to the components. 4. The door can realize bidirectional rotation in clockwise and counterclockwise directions from the normally closed position. When the driving force applied to the door is released, the door can return to the normally closed position, solving the problem of bidirectional return.

[0004] The technical solution is as follows: A hidden automatic door closing system, comprising a fixed column 1, a roller 2, and a rotating sleeve 3, wherein the fixed column 1 is fixed to a door frame column 12 or the ground, the rotating sleeve 3 is fixedly connected to a door leaf 13, the fixed column 1 is cylindrical, the roller 2 is fixedly connected to the side of the fixed column 1, the rotating sleeve 3 is hollow cylindrical, and the ends of the rotating sleeve 3 are respectively extended with a first connecting block 5 and a second connecting block 6 along the radial outer side, and at the connection between the second connecting block 6 and the rotating sleeve 3, the end surface of the rotating sleeve 3 A roller groove 9 is provided, and a first rotating arc surface 7 and a second rotating arc surface 8 are respectively provided on the end surface of the rotating sleeve 3 between the first connecting block 5 and the second connecting block 6, and the first rotating arc surface 7 and the second rotating arc surface 8 are connected through the roller groove 9; the fixed column 1 penetrates into the middle cavity of the rotating sleeve 3, and when the rotating sleeve 3 rotates with the door body, the first rotating arc surface 7 and the second rotating arc surface 8 are in contact with the circumference of the roller 2, the roller 2 rolls passively, and the rotating sleeve 3 is spirally lifted and lowered along the fixed column 1.

[0005] Preferably, the rotating sleeve 3 is fixedly connected to the profile 4, the profile 4 is built into the bottom of the door leaf 13 and is fixedly connected to the door leaf 13; the profile 4 includes a first vertical plate 41, a second vertical plate 42, a first horizontal plate 43, and a second horizontal plate 44, the first vertical plate 41, the second vertical plate 42, the first horizontal plate 43, and the second horizontal plate 44 surround a profile cavity 45, the rotating sleeve 3 is built into the profile cavity 45, and is fixedly connected to the profile 4 through the first horizontal plate 43.

[0006] Preferably, the first connecting block 5 and the second connecting block 6 are provided with screw holes 11 , and the first connecting block 5 and the second connecting block 6 are fixedly connected to the first transverse plate 43 by screws 10 .

[0007] Preferably, the fixing column 1 is fixedly connected to the door frame column 12 via an L-shaped plate 14, one folded surface of the L-shaped plate 14 is connected to the ground via an expansion screw 15, and the other folded surface of the L-shaped plate 14 is fixedly connected to the door frame column 12 via screws.

[0008] Preferably, the roller 2 is a high-strength bearing.

[0009] The beneficial effects of the utility model are as follows: 1. The first rotating arc surface 7, the second rotating arc surface 8, and the roller groove 9 are combined into a closed and annular spiral inclined surface. Under the action of the door body's own gravity and the inclined surface of the rotating sleeve 3, the rotating sleeve stays at the lowest position of the roller groove 9, which is also the position where the door leaf is in a closed state, so that the utility model has an automatic door closing function. The door closing system removes the commonly used spring components and will not affect the use due to spring aging and breakage. In the prior art, the door closing device that does not use springs, when the door is opened, the door body is tilted, and an angle is obviously formed between the door leaf and the door frame, which affects the appearance. With this patented product, when the door is opened, the door leaf and the door frame are parallel to each other, and the door body is beautiful. 2. The friction between the fixed column and the rotating sleeve of the utility model is the rolling friction generated between the roller 2 and the inclined surface of the rotating sleeve. In particular, the roller adopts a high-strength bearing. The friction method of the rolling friction mechanism can reduce the wear of the components, improve the wear resistance of the door, and make the door smoother when opening and closing. 3. Since the automatic door closing device of the utility model is installed inside the profile cavity, and the profile is installed inside the door leaf, it can prevent external dust and other pollutants from accumulating on the door closing device and the door leaf, thereby avoiding the wear of the components and improving the performance. In addition, the door closing device cannot be observed from the appearance of the door, and the surface of the door leaf is a smooth plane, which increases the aesthetic appearance of the door and is not easy to accumulate dust. Even if there is a small amount of dust, it is convenient to clean. 4. Since the first rotating arc surface 7, the second rotating arc surface 8, and the roller groove 9 are combined into a closed and annular inclined surface, the door can be rotated arbitrarily within a range of 280 degrees in the clockwise and counterclockwise directions. Therefore, the door can realize bidirectional rotation in the clockwise and counterclockwise directions from the normally closed position. When the driving force applied to the door is released, the door can return to the normally closed position, and the bidirectional return function of the door can be realized. 5. The fixing column 1 is fixed to the door frame column or the ground, that is, the fixing column 1 is installed on the ground, the weight of the door is borne on the ground through the fixing column, and the door frame and the wall do not need to bear the weight of the door, and repeated use will not cause damage to the door frame and the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional schematic diagram of the matching relationship of components of the hidden automatic door closing system of the utility model.

[0011] Figure 2 It is a three-dimensional structural schematic diagram of the rotating sleeve of the utility model.

[0012] Figure 3 It is a plan view of the coordination relationship of components of the concealed automatic door closing system of the utility model.

[0013] Figure 4 yes Figure 3 Bottom view of .

[0014] Figure 5It is a schematic diagram of the installation relationship between the components and profiles of the concealed automatic door closing system described in the utility model.

[0015] Figure 6 It is a schematic diagram of the hidden automatic door closing system of the utility model in the door opening state when the roller deviates from the roller groove.

[0016] Figure 7 It is a schematic diagram of the assembly relationship of the hidden automatic door closing system of the utility model.

[0017] Figure 8 yes Figure 7 A local enlarged schematic diagram of point A in the middle. DETAILED DESCRIPTION

[0018] The utility model is further described in conjunction with the following specific implementation methods.

[0019] Figure 1 to Figure 8 Explanation of the reference numerals in the figure: fixed column 1, roller 2, rotating sleeve 3, profile 4, first vertical plate 41, second vertical plate 42, first horizontal plate 43, second horizontal plate 44, profile cavity 45, first connecting block 5, second connecting block 6, first rotating arc surface 7, second rotating arc surface 8, roller groove 9, screw 10, screw hole 11, door frame column 12, door leaf 13, L-shaped plate 14, expansion screw 15.

[0020] Specific embodiment: Reference Figure 1 , Figure 3 and Figure 8 A hidden automatic door closing system includes a fixed column 1, a roller 2, and a rotating sleeve 3. The fixed column 1 is fixed to a door frame column 12 or the ground. Specifically, the lower end of the fixed column 1 is welded to an L-shaped plate 14, and the L-shaped plate 14 is fixed to the ground by an expansion screw 15. The vertical surface of the L-shaped plate 14 is fixedly connected to the door frame column 12. Figure 8 As shown. Or a pad extends from the outer door frame near the ground, and the fixed column is fixedly connected to the pad. The rotating sleeve 3 is fixedly connected to the door leaf, and the door leaf rotates under the action of external force, and the rotating sleeve 3 also rotates accordingly. The fixed column 1 is cylindrical, and the roller 2 is fixedly connected to the side of the fixed column 1, wherein the roller 2 can rotate around its own central axis. The roller 2 can use a high-strength bearing.

[0021] refer to Figure 2 and Figure 4The rotating sleeve 3 is in a hollow cylindrical shape. The end of the rotating sleeve 3 is respectively extended with a first connecting block 5 and a second connecting block 6 along the radial outer side. The second connecting block 6 is connected to the rotating sleeve 3, and a roller groove 9 is provided on the end surface of the rotating sleeve 3. A first rotating arc surface 7 and a second rotating arc surface 8 are respectively provided between the first connecting block 5 and the second connecting block 6, and on the end surface of the rotating sleeve 3. The first rotating arc surface 7 and the second rotating arc surface 8 are connected through the roller groove 9; that is, the first arc surface 7, the second arc surface 8, and the roller groove 9 are combined into a closed and spiral inclined surface. In the specific implementation process, the spiral inclined surface has an angle with the horizontal plane. The fixed column 1 is inserted into the middle cavity of the rotating sleeve 3. When the rotating sleeve 3 rotates, the first rotating arc surface 7 and the second rotating arc surface 8 are in contact with the circumference of the roller 2, and the roller 2 rolls passively. The rotating sleeve 3 is spirally lifted and lowered along the fixed column 1 under the action of the roller 2. Rolling friction replaces sliding friction, and the friction resistance is significantly reduced. Specifically: when the door leaf is in the normally closed position, the roller 2 is in the roller groove 9. When the door leaf is opened, the roller 2 rolls relative to the spiral inclined surface. In fact, the position of the roller is fixed. As the door leaf rotates, the rotating sleeve 3 fixedly connected to the door leaf rotates, and the roller 2 deviates from the roller groove 9 and is located at a certain position of the first rotating arc surface 7 or the second rotating arc surface 8. When the external force to open the door leaf disappears, due to the deadweight of the door, the rotating sleeve 3 returns to its original position, and the roller 2 returns to the roller groove 9, and the door leaf returns to the closed state.

[0022] refer to Figure 5 and Figure 6 The rotating sleeve 3 is fixedly connected to the profile 4, and the profile 4 is built into the bottom of the door leaf and fixedly connected to the door leaf; the profile 4 includes a first vertical plate 41, a second vertical plate 42, a first horizontal plate 43, and a second horizontal plate 44, and the first vertical plate 41, the second vertical plate 42, the first horizontal plate 43, and the second horizontal plate 44 surround a profile cavity 45, and the rotating sleeve 3 is built into the profile cavity 45 and fixedly connected to the profile 4 through the first horizontal plate 43.

[0023] refer to Figure 7 and Figure 8 The fixing column 1 is fixedly connected to the door frame column 12 through an L-shaped plate 14, one folded surface of the L-shaped plate 14 is connected to the ground through an expansion screw 15, and the other folded surface of the L-shaped plate 14 is fixedly connected to the door frame column 12 through a screw. Except for a small part of the fixing column 1 between the ground and the bottom of the door leaf, the rest of the whole device is hidden inside the door leaf 13. The device is mainly used in food, medical, and electronic manufacturing industries, such as airtight doors used in medical operating rooms, sterile wards, and dust-free workshops.

[0024] The above is a specific description of the best implementation mode of the utility model, but the invention of the utility model is not limited to this embodiment. Those skilled in the art can make various equivalent changes or substitutions without violating the spirit of the utility model. These equivalent changes or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A concealed automatic door closing system, comprising a fixed column (1), a roller (2), and a rotating sleeve (3), wherein the fixed column (1) is fixed to a door frame column (12) or the ground, and the rotating sleeve (3) is fixedly connected to a door leaf (13), characterized in that: The fixed column (1) is cylindrical in shape, the roller (2) is fixedly connected to the side of the fixed column (1), the rotating sleeve (3) is hollow in shape, and the end of the rotating sleeve (3) is respectively provided with a first connecting block (5) and a second connecting block (6) extending radially outwardly, and at the connection between the second connecting block (6) and the rotating sleeve (3), a roller groove (9) is provided on the end surface of the rotating sleeve (3), and between the first connecting block (5) and the second connecting block (6), a roller groove (9) is provided on the rotating sleeve (3) The end surfaces are respectively provided with a first rotating arc surface (7) and a second rotating arc surface (8), and the first rotating arc surface (7) and the second rotating arc surface (8) are connected via the roller groove (9); the fixed column (1) penetrates into the middle cavity of the rotating sleeve (3), and when the rotating sleeve (3) rotates with the door body, the first rotating arc surface (7) and the second rotating arc surface (8) are in contact with the circumference of the roller (2), the roller (2) rolls passively, and the rotating sleeve (3) is lifted and lowered in a spiral along the fixed column (1).

2. A hidden automatic door closing system according to claim 1, characterized in that: The rotating sleeve (3) is fixedly connected to the profile (4); the profile (4) is built into the bottom of the door leaf (13) and is fixedly connected to the door leaf (13); the profile (4) comprises a first vertical plate (41), a second vertical plate (42), a first horizontal plate (43), and a second horizontal plate (44); the first vertical plate (41), the second vertical plate (42), the first horizontal plate (43), and the second horizontal plate (44) enclose a profile cavity (45); the rotating sleeve (3) is built into the profile cavity (45) and is fixedly connected to the profile (4) via the first horizontal plate (43).

3. A hidden automatic door closing system according to claim 2, characterized in that: The first connecting block (5) and the second connecting block (6) are provided with screw holes (11), and the first connecting block (5) and the second connecting block (6) are fixedly connected to the first transverse plate (43) by means of screws (10).

4. A hidden automatic door closing system according to claim 1, characterized in that: The fixing column (1) is fixedly connected to the door frame column (12) via an L-shaped plate (14); one folded surface of the L-shaped plate (14) is connected to the ground via an expansion screw (15); and the other folded surface of the L-shaped plate (14) is fixedly connected to the door frame column (12) via a screw.

5. A hidden automatic door closing system according to claim 1, characterized in that: The roller (2) is a high-strength bearing.

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