Movable threshold type double-leaf civil air defense door structure

Abstract

The utility model relates to a movable threshold type double-leaf civil air defense door structure, and belongs to the technical field of civil air defense doors. The door comprises a door frame and a doorsill, two door leaves are arranged on the door frame, the door further comprises a mounting base, a lifting assembly and a fixing assembly, the mounting base is pre-buried below the door frame, a containing groove for containing the doorsill is formed in the mounting base, the lifting assembly is arranged on the mounting base and connected with the doorsill, and the fixing assembly is arranged in the containing groove. The lifting assembly is used for driving a threshold to move in the vertical direction, and the fixing assembly is arranged on the lower portion of a door frame and used for fixing the threshold to the door frame. The problem that disassembly and assembly of the movable doorsill of the double-door-leaf civil air defense door are time-consuming and labor-consuming can be solved.

Description

Technical Field

[0001] The present application relates to the field of civil air defense door technology, and in particular to a movable threshold type double-leaf civil air defense door structure. Background Art

[0002] The full name of civil defense project is people's air defense project, which refers to underground protective buildings built separately to ensure the shelter of personnel and materials, civil air defense command, and medical rescue in wartime, as well as basements built in combination with ground buildings that can be used for air defense in wartime.

[0003] Civil defense doors are the entrances and exits of civil defense projects. They have functions such as fire prevention, theft prevention, smoke prevention, and explosion prevention. They protect personnel, materials, and equipment inside the defense project from the harm of war, and provide safe evacuation routes for personnel in wartime or emergency situations. According to the structural type, civil defense doors include ordinary single-leaf and double-leaf civil defense doors and single-leaf and double-leaf civil defense doors with movable thresholds.

[0004] The threshold of the current double-leaf civil air defense door with a movable threshold is generally detachably mounted on the door frame by bolts. When the movable threshold needs to be installed or removed, multiple bolts need to be screwed, and the threshold itself has a large mass, which makes it time-consuming and laborious to remove and install the movable threshold. Summary of the invention

[0005] In order to improve the problem that the disassembly and installation of the movable threshold of a double-leaf civil air defense door is time-consuming and labor-intensive, the present application provides a movable threshold type double-leaf civil air defense door structure.

[0006] The present application provides a movable threshold type double-leaf civil defense door structure adopts the following technical solution:

[0007] A movable threshold type double-leaf civil defense door structure, including a door frame and a threshold. The door frame is provided with two door leaves, and also includes a mounting seat, a lifting assembly and a fixing assembly. The mounting seat is pre-buried below the door frame, and a receiving groove for placing the threshold is provided on the mounting seat. The lifting assembly is arranged on the mounting seat and connected to the threshold. The lifting assembly is used to drive the threshold to move in a vertical direction. The fixing assembly is arranged at the lower part of the door frame, and the fixing assembly is used to fix the threshold to the door frame.

[0008] Optionally, the lifting assembly comprises a scissors lift.

[0009] Optionally, a slot for inserting the threshold is provided under the door frame, and the fixing assembly includes a fixing pin, which is inserted through the door frame and the slot, and a pin hole directly opposite to the fixing pin is provided on the threshold.

[0010] Optionally, the threshold includes a first section and a second section, the first section and the second section correspond to two door leaves respectively, the lifting components are also provided with two and correspond to the first section and the second section respectively, and two limit components are also provided on the mounting seat, the two limit components correspond to the first section and the second section respectively, and the limit components are used to prevent the first section and the second section from moving in the horizontal direction.

[0011] Optionally, the limiting assembly includes a steel ball and a spring, and the inner wall of the accommodating groove is provided with two relative limiting grooves in the fitting section with the first segment and two relative limiting grooves in the fitting section with the second segment. The bottom wall of the limiting groove is inclined, and the two relative ends of the limiting grooves with shallow depths are arranged opposite to each other. The steel ball and the spring are both located in the limiting groove, and the spring makes the steel ball always have a tendency to move toward the end of the limiting groove with shallow depth. An unlocking piece is also provided on the mounting seat, and the unlocking piece is connected to the steel ball and is used to drive the steel ball to move toward the end of the limiting groove with deep depth.

[0012] Optionally, the unlocking member includes an annular sleeve and an electromagnet, the steel ball is embedded and rollingly arranged in the annular sleeve, the electromagnet is arranged on the mounting seat and located at the end with a deeper depth of the limiting groove, and the annular sleeve is made of magnetic conductive metal.

[0013] Optionally, a sliding block is provided on the annular sleeve, and sliding grooves parallel to the bottom wall of the limiting groove are provided on both side walls of the limiting groove, and the sliding block is slidably arranged in the sliding grooves.

[0014] Optionally, the limiting assembly is disposed on the mounting seat and on both sides of the accommodating groove.

[0015] In summary, the present application includes at least one of the following beneficial technical effects:

[0016] 1. The threshold slides vertically in the mounting seat. When the threshold needs to be lowered, the threshold is driven to move downward vertically through the lifting assembly so that the threshold moves into the mounting seat; when the threshold needs to be installed, the threshold is driven to move upward vertically through the lifting assembly so that the threshold protrudes from the ground. There is no need to disassemble and install the threshold with bolts, which makes it easy to adjust the threshold, improving the current time-consuming and labor-intensive problem of disassembling and installing the threshold. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0018] Figure 2 It is a schematic diagram for illustrating the structure of the lifting assembly in the embodiment of the present application.

[0019] Figure 3It is a schematic diagram for illustrating the structure of the limiting component in the embodiment of the present application.

[0020] Description of reference numerals:

[0021] 1. Door frame; 11. Slot; 2. Door threshold; 21. Pin hole; 22. First section; 23. Second section; 3. Door leaf; 4. Mounting seat; 41. Receiving slot; 42. Limiting slot; 5. Lifting assembly; 51. Scissor lift; 6. Fixing assembly; 61. Fixing pin; 7. Limiting assembly; 71. Steel ball; 72. Spring; 73. Ring sleeve; 74. Slider; 75. Slide groove. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-3 This application is described in further detail.

[0023] The present application embodiment discloses a movable threshold type double-leaf civil defense door structure, referring to Figure 1 and Figure 2 A movable threshold type double-leaf civil air defense door structure includes a door frame 1, a threshold 2 located at the bottom of the door frame 1, and two door leaves 3 are hinged on the door frame 1. It also includes a mounting seat 4, a lifting assembly 5 and a fixing assembly 6. The mounting seat 4 is a steel rectangular block, and the length of the mounting seat 4 is greater than the overall width of the door frame 1. The mounting seat 4 is pre-embedded under the door frame 1 during ground pouring construction, and a receiving groove 41 for placing the threshold 2 is opened on the mounting seat 4. The lifting assembly 5 is arranged on the mounting seat 4 and connected to the threshold 2. The lifting assembly 5 is used to drive the threshold 2 to move in the vertical direction in the receiving groove 41. The fixing assembly 6 is arranged at the lower part of the door frame 1, and the fixing assembly 6 is connected to the threshold 2. The fixing assembly 6 is used to fix the threshold 2 to the door frame 1.

[0024] The threshold 2 is slidably arranged in the mounting seat 4 along the vertical direction. When the threshold 2 needs to be lowered, the threshold 2 is driven to move downward along the vertical direction by the lifting assembly 5, so that the threshold 2 moves into the mounting seat 4; when the threshold 2 needs to be installed, the threshold 2 is driven to move upward along the vertical direction by the lifting assembly 5, so that the threshold 2 protrudes from the ground. There is no need to disassemble and install the movable threshold by bolts, which is convenient for adjusting the threshold 2, and improves the problem of time-consuming and labor-intensive disassembly and installation of the threshold 2.

[0025] Reference Figure 2The lifting assembly 5 includes a scissor lift 51, which is installed in the mounting seat 4 and located at the bottom of the receiving groove 41, and the top of the scissor lift 51 conflicts with the bottom plane of the threshold 2. By driving the scissor lift 51 to lift, the threshold 2 is driven to move in the vertical direction, so as to facilitate the effect of driving the threshold 2 to move in the vertical direction. A slot 11 is provided at the lower part of the column of the door frame 1 opposite to the threshold 2, and the slot 11 is adapted to the threshold 2 and is used for the threshold 2 to be inserted. The fixing assembly 6 includes a fixing pin 61, which is inserted into the door frame 1 in a direction perpendicular to the plane of the door leaf 3, and the fixing pin 61 passes through the slot 11, and pin holes 21 facing the fixing pin 61 are provided at both ends of the threshold 2. Further, two fixing pins 61 are inserted side by side in the vertical direction, and the two fixing pins 61 make the threshold 2 and the door frame 1 more firmly fixed. Furthermore, a magnet block may be embedded at the end of the fixing pin 61 and in the door frame 1 , so that the fixing pin 61 is attracted by the magnet block when inserted into the door frame 1 , thereby preventing the fixing pin 61 from falling off from the door frame 1 to a certain extent.

[0026] Reference Figure 1-Figure 3 The threshold 2 includes a first section 22 and a second section 23. The length structures of the first section 22 and the second section 23 are the same. The first section 22 and the second section 23 correspond to the two door leaves 3. Two lifting assemblies 5 are also provided and correspond to the first section 22 and the second section 23 respectively. Two limiting assemblies 7 are also provided on the mounting seat 4. The two limiting assemblies 7 correspond to the first section 22 and the second section 23 respectively. The limiting assemblies 7 are used to prevent the first section 22 and the second section 23 from moving in the horizontal direction.

[0027] The threshold 2 is divided into two parts, and the first section 22 and the second section 23 are respectively opposite to the two door leaves 3, and the first section 22 and the second section 23 can be driven independently to move in the vertical direction, so that when only one of the door leaves 3 needs to be opened and the threshold 2 is lowered, the threshold 2 corresponding to the opened door leaf 3 can be driven down by the lifting assembly 5, and the threshold 2 of the unopened door leaf 3 can work normally, thereby ensuring the airtightness of the unopened door leaf 3.

[0028] Reference Figure 2 and Figure 3The limiting assembly 7 includes a steel ball 71 and a spring 72. Two relative limiting grooves 42 are provided on the inner wall of the receiving groove 41 in the section where the first segment 22 is fitted, and two relative limiting grooves 42 are also provided on the inner wall of the receiving groove 41 in the section where the second segment 23 is fitted. The bottom walls of the limiting grooves 42 are all inclined, and the two opposite limiting grooves 42 with shallow depths are arranged opposite to each other. The steel ball 71 is located in the limiting groove 42, and the diameter of the steel ball 71 is less than the depth of the deepest end of the limiting groove 42 and greater than the depth of the shallowest end of the limiting groove 42. The spring 72 is also located in the limiting groove 42 and connected to the steel ball 71. The other end of the spring 72 is connected to the side wall of the limiting groove 42. The spring 72 makes the steel ball 71 always have a tendency to move toward the shallow end of the limiting groove 42. An unlocking member is also provided on the mounting seat 4, and the unlocking member is connected to the steel ball 71. The unlocking assembly is used to drive the steel ball 71 to move toward the deep end of the limiting groove 42.

[0029] During the process of the first section 22 and the second section 23 of the threshold 2 moving in the vertical direction, the steel ball 71, under the action of the spring 72, always keeps one side of the steel ball 71 in contact with the threshold 2 and the other side in contact with the bottom wall of the limiting groove 42. Since the shallower ends of the two relative limiting grooves 42 are arranged opposite to each other, that is, the shallower ends of the two relative limiting grooves 42 are close to each other, when the first section 22 or the second section 23 has a tendency to move in the horizontal direction, the steel ball 71 in one of the limiting grooves 42 has a tendency to move toward the deeper side of the limiting groove 42, and the steel ball 71 in the other side has a tendency to move toward the shallower side of the limiting groove 42, so that the steel ball 71 clamps the threshold 2. Therefore, when the first section 22 or the second section 23 has a tendency to move left and right in the horizontal direction, there is always a steel ball 71 in one of the limiting grooves 42 that can limit it, so as to achieve the effect of limiting the movement of the first section 22 and the second section 23 in the horizontal direction. When the first segment 22 and the second segment 23 move in the vertical direction, the steel ball 71 rolls in the limiting groove 42 , but the position of the steel ball 71 in the limiting groove 42 makes the movement of the first segment 22 and the second segment 23 in the vertical direction unrestricted.

[0030] Reference Figure 3 The unlocking member includes an annular sleeve 73 and an electromagnet. The annular sleeve 73 is an annular plate with an arc shape on the inner side. The steel ball 71 is embedded and rollingly installed in the annular sleeve 73. The steel ball 71 can rotate in the annular sleeve 73 but cannot be separated from the annular sleeve 73. The electromagnet is arranged on the mounting seat 4 and is located at the end with a deeper depth of the limiting groove 42. The annular sleeve 73 is made of magnetic conductive metal. When the electromagnet is started, the electromagnet drives the annular sleeve 73 to move, and then drives the steel ball 71 to move toward the end with a deeper depth of the limiting groove 42. At this time, the steel ball 71 is separated from the threshold 2, which is convenient for installing the threshold 2 into the mounting seat 4 in the early installation.

[0031] Reference Figure 3 Slide blocks 74 are provided on both sides of the annular sleeve 73, and slide grooves 75 parallel to the bottom wall of the limiting groove 42 are provided on both side walls of the limiting groove 42, and the slide blocks 74 are slidably installed in the slide grooves 75. The arrangement of the slide blocks 74 and the slide grooves 75 enables the annular sleeve 73 to move only in a direction parallel to the bottom wall of the limiting groove 42, so that the steel ball 71 always keeps one side in contact with the bottom wall of the limiting groove 42.

[0032] Furthermore, limiting grooves 42 are provided on the mounting seat 4 and on both sides of the receiving groove 41 , and limiting components 7 are provided on both sides of the receiving groove 41 , thereby improving the limiting effect on the first segment 22 and the second segment 23 .

[0033] The implementation principle of the movable threshold type double-leaf civil air defense door structure of the present application embodiment is as follows: the threshold 2 is slidably arranged in the mounting seat 4 along the vertical direction. When the threshold 2 needs to be lowered, the threshold 2 is driven to move downward along the vertical direction by the lifting assembly 5, so that the threshold 2 moves into the mounting seat 4; when the threshold 2 needs to be installed, the threshold 2 is driven to move upward along the vertical direction by the lifting assembly 5, so that the threshold 2 protrudes from the ground. There is no need to disassemble and install the movable threshold by bolts, which is convenient for adjusting the threshold 2, and improves the problem of time-consuming and labor-intensive disassembly and installation of the threshold 2.

[0034] Finally, it should be noted that in the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A movable threshold type double-leaf civil air defense door structure, comprising a door frame (1) and a threshold (2), wherein two door leaves (3) are arranged on the door frame (1), characterized in that: The invention also comprises a mounting seat (4), a lifting assembly (5) and a fixing assembly (6); the mounting seat (4) is pre-buried and arranged below the door frame (1); the mounting seat (4) is provided with a receiving groove (41) for placing the threshold (2); the lifting assembly (5) is arranged on the mounting seat (4) and connected to the threshold (2); the lifting assembly (5) is used to drive the threshold (2) to move in a vertical direction; the fixing assembly (6) is arranged at the lower part of the door frame (1); the fixing assembly (6) is used to fix the threshold (2) to the door frame (1).

2. The movable threshold type double-leaf civil air defense door structure according to claim 1, characterized in that: The lifting assembly (5) comprises a scissor-type lift (51).

3. The movable threshold type double-leaf civil air defense door structure according to claim 1, characterized in that: A slot (11) for inserting the door sill (2) is provided below the door frame (1), the fixing assembly (6) comprises a fixing pin (61), the fixing pin (61) is inserted into the door frame (1) and passes through the slot (11), and a pin hole (21) facing the fixing pin (61) is provided on the door sill (2).

4. The movable threshold type double-leaf civil air defense door structure according to claim 1, characterized in that: The threshold (2) comprises a first section (22) and a second section (23), wherein the first section (22) and the second section (23) respectively correspond to two door leaves (3), the lifting components (5) are also provided with two and respectively correspond to the first section (22) and the second section (23), and the mounting seat (4) is also provided with two limit components (7), wherein the two limit components (7) respectively correspond to the first section (22) and the second section (23), and the limit components (7) are used to prevent the first section (22) and the second section (23) from moving in a horizontal direction.

5. The movable threshold type double-leaf civil air defense door structure according to claim 4 is characterized in that: The limiting assembly (7) comprises a steel ball (71) and a spring (72). The inner wall of the accommodating groove (41) is provided with two relative limiting grooves (42) in the section fitting with the first segment (22), and the section fitting with the second segment (23) is also provided with two relative limiting grooves (42). The bottom wall of the limiting groove (42) is arranged obliquely, and the two relative ends of the limiting grooves (42) with shallow depth are arranged opposite to each other. The steel ball (71) and the spring (72) are both located in the limiting groove (42), and the spring (72) makes the steel ball (71) always have a tendency to move toward the end of the limiting groove (42) with shallow depth. An unlocking member is also arranged on the mounting seat (4), and the unlocking member is connected with the steel ball (71) and is used to drive the steel ball (71) to move toward the end of the limiting groove (42) with deep depth.

6. The movable threshold type double-leaf civil air defense door structure according to claim 5, characterized in that: The unlocking member comprises an annular sleeve (73) and an electromagnet. The steel ball (71) is embedded and rollingly arranged in the annular sleeve (73). The electromagnet is arranged on the mounting seat (4) and is located at the deep end of the limiting groove (42). The annular sleeve (73) is made of magnetic conductive metal.

7. The movable threshold type double-leaf civil air defense door structure according to claim 6, characterized in that: The annular sleeve (73) is provided with a sliding block (74), and both side walls of the limiting groove (42) are provided with sliding grooves (75) parallel to the bottom wall of the limiting groove (42), and the sliding block (74) is slidably arranged in the sliding grooves (75).

8. The movable threshold type double-leaf civil air defense door structure according to claim 4, characterized in that: The limiting components (7) are arranged on the mounting seat (4) and on both sides of the accommodating groove (41).

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