Ladder link fixing structure

Abstract

A ladder link fixing structure including a horizontal pipe and two link structures. The link structure includes a first link 4 and a second link 5. A connecting sleeve 6 is provided at one end of the fixing sleeve of the first link 4. A pin rod is slidably connected within the connecting sleeve 6. A jack is open in the second link 5. The horizontal pipe 2 is connected between the two connecting sleeves 6. A drive structure is provided within the horizontal pipe 2 and the two connecting sleeves 6 to move the two pin rods while pulling them back within the connecting sleeves 6, thereby creating a repulsive force on the pin rods. [Effect] When the V-shaped ladder is fully extended, the first link 4 and the second link 5 can be automatically locked, thereby increasing the stability of the V-shaped ladder. Moreover, both link structures can be unlocked simultaneously with a single key, and the unlocking process of the link structures is quick and convenient, without affecting the efficiency when storing the V-shaped ladder.

Description

Technical Field

[0001] The present invention relates to the technical field of ladders, and specifically, to a link stable structure for ladders.

Background Art

[0002] A ladder is equipment that supports workers to perform operations in the air. Ladders in the prior art are generally composed of upper hinges of two ladder bodies. When idle, it rotates to fold the two ladder bodies, which is convenient for storing the A-frame ladder. When in use, it rotates to unfold the two ladder bodies, forming a certain angle between the two ladder bodies. The bottom ends of the two ladder bodies all contact the ground, and no support by a dedicated person is required during use, nor is it necessary to use other objects, and it can support itself. However, since the angle between the two ladder bodies is not restricted, when a certain vibration occurs, the ladder rods slide, the angle between the two ladder bodies becomes larger, and the telescopic ladder body generates a certain shake, which is dangerous. Therefore, in the prior art, usually, two symmetrically installed stable structures are connected between the two ladder bodies. The stable structure is generally composed of two links. The separated ends on the two links are respectively hinge-connected to the two ladder bodies, and the opposite sides on the two links are hinge-connected to each other. For example, there are the folding of the A11 type household safety ladder, the A0113 - 104 type household ladder, the 33 - 4 type fiberglass insulated ladder, etc. The stable structure is deployed synchronously with the escalator closed. On the one hand, the stable structure is used to limit the unfolding angle of the A-frame ladder so that when the unfolding angle of the A-frame ladder is too large, it will not become unstable when the user stands on it. On the other hand, when the user... ... ... ... ... ... ... ... ... ... ... ... ... ... It is used to improve the stability of the escalator when standing on it. However, When the ladder is deployed and the user stands on it, the space between the two links is fixed. Because there is no one there, the stability of the human-shaped ladder itself is not strong, and if you accidentally fall towards the bottom of the top of the human-shaped ladder Touching it could cause the ladder to fall. For example, after the user has unfolded the ladder. As I was trying to climb the ladder, I accidentally tripped and fell, hitting the bottom part of the ladder. It fell over in minutes. At this time, the ladder rotated and folded to a certain angle, and the ladder became stable. Unable to place it on the ground, the ladder toppled over and fell onto the user. Therefore, the conventional stable structure is only effective when the user is standing on the ladder. Under the influence of gravity, it can provide a stabilizing effect on the human-shaped ladder. When standing on a figure-eight ladder, the stabilizing structure only serves to limit the extension angle of the figure-eight ladder. It does not contribute to increasing the stability of the human-shaped ladder. Therefore, in this invention, when the ladder as described above is deployed and a person stands on the ladder, the ladder itself We propose a technology to solve the problem of insufficient stability. [Overview of the Initiative]

[0003] In response to the shortcomings of the prior art, the objective of the present invention is to achieve the complete deployment of the human-shaped ladder. Therefore, the first and second links are automatically fixed, thereby locking the link structure. This allows the user to stand on the N-shaped ladder, and the link structure also enhances the stability of the N-shaped ladder. It can fulfill the role of unlocking and simultaneously unlocking two link structures with a single click. The unlocking process of the link structure is quick and convenient, and when storing the human-shaped ladder... The goal is to provide technological benefits that do not affect efficiency. The ladder link stabilization structure includes a horizontal pipe and two link structures, and the two link structures are The two ladder sections are hinged together and installed symmetrically front to back. The structure includes a first link and a second link, and one end that separates from the first and second links is Each of the two ladder sections is hinged together. One of the connecting sleeves is attached to the pin rod. The end can be inserted, and the horizontal pipe is connected between two connecting sleeves, and the two connecting sleeves Connected between the leaves, the horizontal pipe and two connecting sleeves move two pin rods. A drive structure is provided to pull the connecting sleeve back while creating a repulsive force on the pin rod. It's being kicked. By adopting the above configuration, the relative rotation between the two ladder bodies in the ladder will occur. The first and second links in the link structure also rotate relative to each other. When the ladder is extended, the link The structure is also unfolded, and the first link is deployed until the angle between the first and second links is 180°. The angle between the first link and the second link gradually increases. During the rotational unfolding of the link structure, The second link is pressed against one end of the pin rod through which the connecting sleeve is inserted, and under the pressure of the second link Then, the pin rod retracts into the connecting sleeve, and the pin rod activates the drive mechanism, the drive mechanism This creates a repulsive force on the pin rod. When the angle between the first link and the second link is 180° In conjunction, the pin rod corresponds to the jack, and due to the repulsive force, the pin rod moves and resets. The pin rod is inserted through one end of the connecting sleeve and then into the jack, and the first link and the second link Once the link is secured and the stairs are extended, the link structure automatically locks into place. Similarly, if you need to fold a human-shaped ladder, first you need to use two pin rods through the drive mechanism. It can be moved and simultaneously pulled back into the connecting sleeve, thus disabling the link structure. When the human-shaped ladder is folded, the link structure automatically folds. This invention relates to the human-shaped ladder. After being attached to the child, when the L-shaped ladder is fully extended, the first and second links automatically... It can be fixed in place, thereby locking the link structure, and when the user stands on the L-shaped ladder, the link The structure also plays a role in increasing the stability of the V-shaped ladder, and moreover, it can be operated simultaneously with a single key. The two link structures can be unlocked, and the unlocking process for the link structures is quick and convenient. This does not affect the efficiency of storing the ladder in the shape of a human. Further installation of the present invention: The drive structure consists of a first button, a push rod and two first drive units. The two first drive units are each located within two connecting sleeves, and are front to back. The first drive unit is installed in a designated location and includes a push block, a fixed sleeve, and a moving block. The fixing sleeve is secured within the connecting sleeve, and one end of the pin rod slides within the fixing sleeve. The movable block is connected, and the first spring is fixedly connected between it and the inner bottom wall of the fixed sleeve, and the movable block is connected The connecting sleeve is located inside the connecting sleeve, the fixing sleeve is installed outside the pin rod, and the moving block is located inside the connecting sleeve. The first inclined surface is installed, and the push block is located inside the connecting sleeve, push block A first chute extending in the left-right direction is provided, and the second inclined surface that aligns with the first inclined surface is The push block moves left and right along the inner wall of the connecting sleeve, and the first shoe The pin rod is located outside the slide sleeve, and the push rod is located inside the horizontal pipe. It moves left and right along the side wall, with both the front and rear ends of the push rod inside two connecting sleeves. It enters and is fixedly connected to two push blocks, with one end of the first button being push It is fixedly connected to the rod, and the other end of the first button is slidably connected and inserted into the horizontal pipe. It is passed through. By adopting the above configuration, when it is necessary to pull back the two pin rods into the connecting sleeve simultaneously by the driving structure, press the first button. The first button moves the push rod along the inner wall of the horizontal pipe. The push rod moves the two push blocks simultaneously. The push blocks move along the inner wall of the connecting sleeve and move along the pin rod through the first chute. The second inclined surface is pressed by the first inclined surface. The force received by the first inclined surface can be decomposed into a force that moves towards the fixed sleeve. Due to this biasing force, the moving block moves the pin rod into the fixed sleeve. Thereby, the pin rod is pulled out from the jack and pulled back into the connecting sleeve. At the same time, the first spring is pressed to form a repulsive force. When it is necessary to pull back the two pin rods into the connecting sleeve simultaneously by the driving structure, press the first button. The first button moves the push rod along the inner wall of the horizontal pipe. The push rod moves the two push blocks simultaneously. The push blocks move along the inner wall of the connecting sleeve and move along the pin rod through the first chute. The second inclined surface is pressed by the first inclined surface. The force received by the first inclined surface can be decomposed into a force that moves towards the fixed sleeve. Due to this biasing force, the moving block moves the pin rod into the fixed sleeve. Thereby, the pin rod is pulled out from the jack and pulled back into the connecting sleeve. At the same time, the first spring is pressed to form a repulsive force. When it is necessary to pull back the two pin rods into the connecting sleeve simultaneously by the driving structure, press the first button. The first button moves the push rod along the inner wall of the horizontal pipe. The push rod moves the two push blocks simultaneously. The push blocks move along the inner wall of the connecting sleeve and move along the pin rod through the first chute. The second inclined surface is pressed by the first inclined surface. The force received by the first inclined surface can be decomposed into a force that moves towards the fixed sleeve. Due to this biasing force, the moving block moves the pin rod into the fixed sleeve. Thereby, the pin rod is pulled out from the jack and pulled back into the connecting sleeve. At the same time, the first spring is pressed to form a repulsive force. When it is necessary to pull back the two pin rods into the connecting sleeve simultaneously by the driving structure, press the first button. The first button moves the push rod along the inner wall of the horizontal pipe. The push rod moves the two push blocks simultaneously. The push blocks move along the inner wall of the connecting sleeve and move along the pin rod through the first chute. The second inclined surface is pressed by the first inclined surface. The force received by the first inclined surface can be decomposed into a force that moves towards the fixed sleeve. Due to this biasing force, the moving block moves the pin rod into the fixed sleeve. Thereby, the pin rod is pulled out from the jack and pulled back into the connecting sleeve. At the same time, the first spring is pressed to form a repulsive force. When it is necessary to pull back the two pin rods into the connecting sleeve simultaneously by the driving structure, press the first button. The first button moves the push rod along the inner wall of the horizontal pipe. The push rod moves the two push blocks simultaneously. The push blocks move along the inner wall of the connecting sleeve and move along the pin rod through the first chute. The second inclined surface is pressed by the first inclined surface. The force received by the first inclined surface can be decomposed into a force that moves towards the fixed sleeve. Due to this biasing force, the moving block moves the pin rod into the fixed sleeve. Thereby, the pin rod is pulled out from the jack and pulled back into the connecting sleeve. At the same time, the first spring is pressed to form a repulsive force. When it is necessary to pull back the two pin rods into the connecting sleeve simultaneously by the driving structure, press the first button. The first button moves the push rod along the inner wall of the horizontal pipe. The push rod moves the two push blocks simultaneously. The push blocks move along the inner wall of the connecting sleeve and move along the pin rod through the first chute. The second inclined surface is pressed by the first inclined surface. The force received by the first inclined surface can be decomposed into a force that moves towards the fixed sleeve. Due to this biasing force, the moving block moves the pin rod into the fixed sleeve. Thereby, the pin rod is pulled out from the jack and pulled back into the connecting sleeve. At the same time, the first spring is pressed to form a repulsive force. When it is necessary to pull back the two pin rods into the connecting sleeve simultaneously by the driving structure, press the first button. The first button moves the push rod along the inner wall of the horizontal pipe. The push rod moves the two push blocks simultaneously. The push blocks move along the inner wall of the connecting sleeve and move along the pin rod through the first chute. The second inclined surface is pressed by the first inclined surface. The force received by the first inclined surface can be decomposed into a force that moves towards the fixed sleeve. Due to this biasing force, the moving block moves the pin rod into the fixed sleeve. Thereby, the pin rod is pulled out from the jack and pulled back into the connecting sleeve. At the same time, the first spring is pressed to form a repulsive force. When it is necessary to pull back the two pin rods into the connecting sleeve simultaneously by the driving structure, press the first button. The first button moves the push rod along the inner wall of the horizontal pipe. The push rod moves the two push blocks simultaneously. The push blocks move along the inner wall of the connecting sleeve and move along the pin rod through the first chute. The second inclined surface is pressed by the first inclined surface. The force received by the first inclined surface can be decomposed into a force that moves towards the fixed sleeve. Due to this biasing force, the moving block moves the pin rod into the fixed sleeve. Thereby, the pin rod is pulled out from the jack and pulled back into the connecting sleeve. At the same time, the first spring is pressed to form a repulsive force. When it is necessary to pull back the two pin rods into the connecting sleeve simultaneously by the driving structure, press the first button. The first button moves the push rod along the inner wall of the horizontal pipe. The push rod moves the two push blocks simultaneously. The push blocks move along the inner wall of the connecting sleeve and move along the pin rod through the first chute. The second inclined surface is pressed by the first inclined surface. The force received by the first inclined surface can be decomposed into a force that moves towards the fixed sleeve. Due to this biasing force, the moving block moves the pin rod into the fixed sleeve. Thereby, the pin rod is pulled out from the jack and pulled back into the connecting sleeve. At the same time, the first spring is pressed to form a repulsive force. Further installation of the present invention: A first auxiliary spring is fixedly connected between both ends of the push rod and the inner walls of the two connecting sleeves. Further installation of the present invention: A first auxiliary spring is fixedly connected between both ends of the push rod and the inner walls of the two connecting sleeves. According to the above configuration, when the push rod moves along the inner wall of the horizontal pipe, the first auxiliary spring is pressed to form a repulsive force. The first auxiliary spring is matched with the first spring to ensure that the driving structure and the pin rod can be reset after the first button is released. According to the above configuration, when the push rod moves along the inner wall of the horizontal pipe, the first auxiliary spring is pressed to form a repulsive force. The first auxiliary spring is matched with the first spring to ensure that the driving structure and the pin rod can be reset after the first button is released. According to the above configuration, when the push rod moves along the inner wall of the horizontal pipe, the first auxiliary spring is pressed to form a repulsive force. The first auxiliary spring is matched with the first spring to ensure that the driving structure and the pin rod can be reset after the first button is released. Further installation of the present invention: The driving structure includes a second button, a fixed sleeve, a mounting block and two second driving units. The fixed sleeve is provided at an external intermediate position of the horizontal pipe. A first opening communicating with its interior is opened on the outer wall of the fixed sleeve. A second opening communicating with its interior and corresponding to the first opening is opened in the horizontal pipe. The mounting block is inside the horizontal pipe. Further installation of the present invention: The driving structure includes a second button, a fixed sleeve, a mounting block and two second driving units. The fixed sleeve is provided at an external intermediate position of the horizontal pipe. A first opening communicating with its interior is opened on the outer wall of the fixed sleeve. A second opening communicating with its interior and corresponding to the first opening is opened in the horizontal pipe. The mounting block is inside the horizontal pipe. Further installation of the present invention: The driving structure includes a second button, a fixed sleeve, a mounting block and two second driving units. The fixed sleeve is provided at an external intermediate position of the horizontal pipe. A first opening communicating with its interior is opened on the outer wall of the fixed sleeve. A second opening communicating with its interior and corresponding to the first opening is opened in the horizontal pipe. The mounting block is inside the horizontal pipe. Further installation of the present invention: The driving structure includes a second button, a fixed sleeve, a mounting block and two second driving units. The fixed sleeve is provided at an external intermediate position of the horizontal pipe. A first opening communicating with its interior is opened on the outer wall of the fixed sleeve. A second opening communicating with its interior and corresponding to the first opening is opened in the horizontal pipe. The mounting block is inside the horizontal pipe. The mounting block is fixed in place, and two symmetrical mounting grooves are provided on the side closer to the second opening. A second chute is cut into the opposite groove wall of each of the two mounting grooves, and one end of the second button is fixed to the slide. Located outside the band, the other end of the second button is fixed through the first opening so as to be slidably connected. Within the cable, the two second drive units are arranged symmetrically, each corresponding to two mounting grooves. The second drive unit consists of a pressing rod, a rotating block and a slide rod, and one end of the pressing rod. It is fixedly connected to the second button, and the other end of the pressing rod is hinged to the rotating block, and rotates The other end of the block is rotatably connected between the upper and lower groove walls of the mounting groove via a pivot axis, and two Rotating plates are integrally molded and spaced apart, and a rotating bridge is formed on the two rotating plates. The end separating from the lock has a circular plate integrally molded, and the end of the slide rod It is slidably connected to the second chute, and the second spring is between it and the bottom of the groove of the second chute. The chute is fixedly connected, the other end of the slide rod passes through the second chute, and the transition rod is fixed. The other end of the transition rod is a moving rod, slide rod, transition rod, transition rod, moving rod The slide rod, moving rod, and moving rod shaft are installed, and the cross-sectional area of ​​the slide rod and moving rod is The misalignment is also greater than that of the transition rod, and the transition rod fits and connects the gap between the two circular plates. It penetrates in this way, and the opposite sides of the slide rod and the moving rod are both the outer wall of the circular plate. They are bonded together, and each of the two movable rods corresponds to two pin rods, and the movable rod The mounting block is drilled so that the end separated from the transition rod is slidably connected. A hole is drilled inside the connecting sleeve, and the pin rod is fixedly connected to it. By adopting the above configuration, the drive structure simultaneously connects two pin rods. If you need to pull it back into the tube, press the second button. The second button moves the pressing rod. It moves by leaning. The pressing rod rotates the rotating block. The rotating block rotates the plate It moves. The rotating plate rotates the circular plate. The circular plate moves to the slide rod. It is being pressed. The slide rod enters the second chute, and the second spring is being pressed. It is compressed and forms a repulsive force. The slide rod moves via the transition rod. Drive the rod and pull it back into the horizontal pipe. The moving rod moves from the jack into the connector sleeve. Pull it out, then pull it back. Further installation of the present invention: On the side of the mounting block closer to the second opening, located between the two mounting grooves The second auxiliary spring is fixed in place, and the other end of the second auxiliary spring is fixedly connected to the second button. According to the above configuration, pressing the second button compresses the second auxiliary spring, creating a rebound force. The second auxiliary spring moves in conjunction with the second spring, and after releasing the second button, the drive structure and pin rod move We guarantee that it can be reset. Further configuration of the present invention: The drive structure consists of two front-to-back symmetrically positioned third drive modules. The third drive module includes a mounting sleeve, slider, third chute, and tension rod. The mounting sleeve is fixed inside the horizontal pipe, and one end of the tension rod slides inside the mounting sleeve. A third spring is fixedly connected between the mounting sleeve and the inner bottom wall, and the other end of the tension rod The mounting sleeve is drilled and fixedly connected to the pin rod, and the third chute is on the outer wall of the horizontal pipe. It is set up in such a way that the third chute extends horizontally in the front and back directions, communicating with the inside of the horizontal pipe, and the slider is It slides back and forth along the third chute, and the bottom end of the slider communicates with the inside of the tension rod. The rod is fixed in place, and the tip of the slider is inserted into the horizontal pipe via the third chute. By adopting the above configuration, the drive structure simultaneously connects two pin rods. If it is necessary to pull it back into the bu, move the two sliders opposite each other. The sliders are in the third s It slides along the rail. The slider moves by moving the tension rod within the mounting sleeve. The pull rod moves the pin rod and pulls it back into the connecting sleeve. At the same time, the third spring It is pressed and forms a repulsive force. Further configuration of the present invention: A slider for shielding the third chute is integrated into the tip of the slider. The slider is molded, and a vertical plate is integrally molded to the tip of the slider. By adopting the above configuration, the sliding plate can be moved by installing the vertical plate. It becomes easier, and the third chute can be shielded by installing a sliding plate. This prevents dust, rainwater, and other impurities from entering the horizontal pipe. Further installation of the present invention: The other end of the second link is connected to the first link and a pin rod via a connecting sleeve. They are connected by rotation. The pin rod not only provides rotational connection between the first and second links, but also connects to the second link via a sliding joint. It also enables rotational connection with the link, is structurally more compact, and is structurally more rationally designed. It is being done. Further installation of the present invention: Positioning for positioning the second link on the outer wall of the connecting sleeve The plate is molded as a single piece. According to the above configuration, when the second link and the positioning plate come into contact, the first link and the second It is not possible to continue the rotational development between the 1st and 2nd links. The angle between them is exactly 180°, and the pin rod also corresponds exactly to the jack. The positioning plate ensures that the pin rod is precisely aligned with the pin hole. It is possible. Further installation of the present invention: The pin rod passes through the first link to provide a sliding connection, and the connecting A cross-section that penetrates one end of the leaf is positioned in an arc shape. By setting the cross-section of the end of the pin rod to be arc-shaped, the pin rod under pressure from the second link It can be easily retracted into the connecting sleeve, and the arc structure does not damage the second link. It is less prone to damage and can extend its lifespan. The beneficial effect of the present invention is that, compared to the prior art, the ladder link stabilization structure, the present invention is applied to the ladder. Once installed, when the ladder is fully extended, the first and second links will automatically lock into place. This allows the link structure to be locked, and when the user stands on the ladder, The link structure can also play a role in increasing the stability of the ladder, and moreover, two link structures It can be unlocked simultaneously with a single touch, and the unlocking process of the link structure is quick and convenient. This is advantageous and does not affect the efficiency of storing the ladder. [Brief explanation of the drawing]

[0004] [Figure 1] Figure 1 is a schematic diagram of the structure when installed on the stairs in the embodiment. [Figure 2] This is a diagram showing the configuration of Example 1. [Figure 3] This is a partial cross-sectional view of Example 1 in a plan view. [Figure 4] This is an enlarged view of Figure 3A. [Figure 5] This is a partial configuration diagram of the first link, second link, pin rod, push rod, and first drive unit in Example 1. [Figure 6] This is a diagram showing the configuration of Example 2. [Figure 7] This is a partial cross-sectional view of Example 2 in a plan view. [Figure 8] This is an enlarged view of section B in Figure 7. [Figure 9]This is an enlarged view of point C in Figure 7. [Figure 10] This is a partial diagram of the second button and second drive component in Example 2. [Figure 11] This is a diagram showing the configuration of Example 3. [Figure 12] This is a partial cross-sectional view of Example 3 in the side view direction. [Figure 13] This is an enlarged view of point D in Figure 12. [Figure 14] This is an enlarged view of point E in Figure 12.

[0005] [Explanation of symbols] 1. Ladder, 2. Horizontal pipe, 3. Mounting plate, 4. First link, 5. Second link, 6. Connecting pipe Reeve, 7, Pin rod, 8, Jack, 9, First button, 10, Push rod, 11 , push block, 12, fixed sleeve, 13, move block, 14, first spring 15, First inclined surface, 16, First chute, 17, Second inclined surface, 18, First auxiliary spring, 1 9. Positioning plate, 20. Second button, 21. Fixing sleeve, 22. Mounting block, 23, First opening, 24, Second opening, 25, Mounting groove, 26, Second chute, 27, Pressing rod 28. Rotating block, 29. Slide rod, 30. Rotating plate, 31. Circular plate 32, 2nd spring, 33, transition rod, 34, moving rod, 35, Second auxiliary spring, 36, mounting sleeve, 37, slider block, 38, third chute 3 9. Tension rod, 40. Third spring, 41. Slider plate, 42. Vertical plate. [Modes for carrying out the invention]

[0006] Hereinafter, with reference to the drawings of embodiments of the present invention, the technical aspects of embodiments of the present invention will be described. This will be explained clearly and completely. Clearly, the described embodiments are some embodiments of the present invention. This is only an example and does not encompass all embodiments. Based on the embodiments of the present invention, those skilled in the art may be creative. All other embodiments obtained without performing labor fall within the scope of the protection of the present invention.

[0007] Example 1: As shown in Figures 1 to 5, the link fixing for the ladder includes a transverse pipe 2 and two link structures. Structure. Both link structures consist of two ladders, including the first link 4 and the second link 5. The first link 4 and the second link 5 are hinged together and arranged symmetrically front to back. The detached ends are hinged to the two ladder bodies of the ladder. 1st link 4 A connecting sleeve 6 is provided at the other end fixing sleeve. Inside the connecting sleeve 6, The pin rod 7 is slidably connected. One end of the pin rod 7 is slidably connected to the first link 4. It penetrates, passes through the connecting sleeve 6, and its cross-section is set to be arc-shaped. The other end of the second link 5 The second link is rotatably connected via the connecting sleeve 6, the first link 4, and the pin rod. In part 5, one end of the connecting sleeve 6, which can be inserted through the pin rod 7, is inserted through the plug hole 8. The horizontal pipe 2 is connected between the two connecting sleeves 6, and between the two connecting sleeves 6 They are connected. Two pin rods 7 are simultaneously connected to the horizontal pipe 2 and the two connecting sleeves 6. A drive structure is provided to pull the connecting sleeve 6 back and create a repulsive force on the pin rod 7. It is being done. The drive structure includes a first button 9, a push rod 10, and two first drive units. The two first drive units are each located within two connecting sleeves 6, and are arranged symmetrically front to back. It is arranged. The first drive unit consists of a push block 11, a fixed sleeve 12, and The movable block 13 is included. The fixed sleeve 12 is fixed inside the connecting sleeve 6. One end of the latch rod 7 is slidably connected and inserted into the fixed sleeve 12, and the fixed sleeve A first spring 14 is fixedly connected between the inner bottom wall of 12. The movable block 13 is connected The connecting sleeve 6 is located inside, and the fixing sleeve is provided outside the pin rod 7. The lock 13 is provided with a first inclined surface 15. The push block 11 is connected by a three It is located inside block 6. Push block 11 has a first chute 16 that extends laterally to the left and right. It is opened, and a second inclined surface 17 is provided that matches the first inclined surface 15. The 11 moves left and right along the inner wall of the connecting sleeve 6 and through the first chute 16 A slide sleeve is provided on the outside of the push rod 7. The push rod 10 is a horizontal pipe Moving left and right along the inner wall of 2, the front and rear ends of the push rod 10 are connected by two connecting sleeves. Each of the 6s has a hole drilled in it and is fixedly connected to the two push blocks 11. One end of the first button 9 is fixedly connected to the push rod 10, and the other end of the first button 9 is The horizontal pipe 2 is inserted so as to be slidably connected. Both ends of the push rod 10 and two connecting A first auxiliary spring 18 is fixedly connected to the inner wall of the connecting sleeve 6. Furthermore, the outer wall of the connecting sleeve 6 has a positioning plate for positioning the second link 5. The link 19 is integrally molded. When the second link 5 contacts the positioning plate 19, The rotational extension cannot continue between the first link 4 and the second link 5. At this time, the first link The angle between link 4 and the second link 5 is exactly 180°, and the pin rod 7 is also connected to the jack. It corresponds to 8. By installing the positioning plate 19, the pin rod 7 is precisely positioned into the pin hole 8. It is guaranteed that they will be aligned. Of note is that in this embodiment, the first link 4, the second link 5, and the ladder body of the ladder are connected. The hinge connection between the first link 4 and the second link 5 is a ladder pedal or ladder tube, or Alternatively, the two adjacent ladder tubes may be hinged together directly in the plastic, Two mounting plates 3 are provided, and the two mounting plates 3 are connected to the left and right sides of the two link structures. The ends are connected with hinges, and the mounting plate 3 is fixed to the escalator pedal with bolts. That's fine. Operating principle: As the two ladder bodies rotate relative to each other, the first link 4 and the second link 5 of the link structure also rotate relative to each other. To change. If you need to fold escalator 1, first press the first button 9. The n9 moves the push rod 10 along the inner wall of the horizontal pipe 2. The support spring 18 is compressed to form a repulsive force. The push rod 10 has two push blocks Move the push block 11 simultaneously. The push block 11 moves along the inner wall of the connecting sleeve 6. It moves and moves along the latch rod 7 via the first chute 16. The second inclined surface 17 is It is pressed against the first inclined surface 15. The force applied to the first inclined surface 15 is distributed to the fixed sleeve 12 This can be broken down into forces that move it toward. This biasing force causes the moving block 13 This moves the pin rod 7 into the fixing sleeve 12. It is pulled out from hole 8 and pulled back into connecting sleeve 6. At the same time, the first spring 14 is pressed. It creates a repulsive force. The link structure can be released, and when escalator 1 is folded, The link structure automatically folds. When the first button 9 is released, the first auxiliary spring 18 and the first... The engagement with pin 14 ensures the return of the drive structure and pin rod 7. Similarly, when ladder 1 is deployed, the link structure is also deployed, and the first link 4 and the second link 5 and The angle between the first link 4 and the second link 5 gradually increases until the angle between them becomes 180°. It becomes larger. In the process of the link structure rotating and unfolding, the second link 5 has an arc-shaped cross-section. Because it is fixed, under the pressure of the second link 5, pin 7 retracts into link 6, and the first spring Link 14 forms a repulsive force. The angle between the first link 4 and the second link 5 is 180°. In this case, the pin rod 7 corresponds to the plug hole 8, and the repulsive force of the first spring 14 causes the pin to be pushed in. Rod 7 moves and resets, and one end of the connecting sleeve 6 is inserted through the pin rod 7. Inserted into hole 8, the fixing between the first link 4 and the second link 5 is completed, and the link structure is After ladder 1 is deployed, it automatically locks. After the present invention is attached to the ladder 1, when the ladder 1 is fully extended, the first link 4 and the second link The 5 is automatically locked, thereby locking the link structure, allowing the user to use the ladder When standing on child 1, the link structure can also play a role in increasing the stability of ladder 1, and moreover 1 One key can unlock two link structures simultaneously, and the link structure unlocks The removal process is quick and convenient, and does not affect the efficiency of storing ladder 1.

[0008] Example 2: The difference from Example 1 is that the drive structure consists of a first button 9, a push rod 10, and two 1. It no longer includes a drive unit. Instead, as shown in Figures 6 to 10, Two buttons 20, a fixed sleeve 21, a mounting block 22, and two second drive units Includes. The fixing sleeve 21 is located at an external intermediate position of the horizontal pipe 2. The outer wall of the fixed sleeve 21 has a first opening 23 that communicates with its interior. Pipe 2 has a second opening 24 that communicates with its interior and corresponds to the first opening 23. The mounting block 22 is fixed inside the horizontal pipe 2. The mounting block 22 has a Two mounting grooves 25 are provided on the side closest to the opening 24, with front-to-back symmetrical arrangement. A second chute 26 is installed on the opposite side of the trench wall. One end of the second button 20 is fixed. It is located outside the sleeve 21. The other end of the second button 20 is fixed through the first opening 23. The two second drive units are slidably connected within the leaf 21. Each has two mounting grooves. It corresponds to 25 and is arranged symmetrically front to back. The second drive unit consists of a pressing rod 27 and a rotating It includes a turning block 28 and a slide rod 29. One end of the pressing rod 27 is connected to the second button. It is fixedly connected to 20. The other end of the pressing rod 27 is hinged to the rotating block 28. The other end of the rotating block 28 rotates via a rotation axis between the upper and lower groove walls of the mounting groove 25. Two rotating plates 30 are connected and spaced apart, and are integrally molded. A circular plate 31 is integrally formed at one end of each of the separation rotation blocks 28 on the plate 30. It is shaped. One end of the slide rod 29 is slidably connected to the second chute 26 and drilled. A second spring 32 is fixedly connected between the second chute 26 and the bottom of the groove. The other end of the dal rod 29 passes through the second chute 26, and the transition rod 33 It is fixed. A moving rod 34 is fixed to the other end of the transition rod 33. The slide rod 29, transient rod 33, and moving rod 34 are all set concentrically and coaxially. The cross-sectional area of ​​the slide rod 29 and the moving rod 34 is the same as that of the transient rod. It is larger than 33. The transition rod 33 is the distance between the two circular plates 31. They pass through in a manner that allows them to interlock and connect. The opposing sides of the slide rod 29 and the moving rod 34 are These are also attached to the outer wall of the circular plate 31. The two movable rods 34 are two Each corresponds to a latch rod 7. Transition rod 34 corresponds to a moving rod 3 The mounting block 22 is slidably connected and inserted from one end of 3, and inside the connecting sleeve 6 It is inserted and fixedly connected to the plug rod 7. The mounting block 22 has two mounting grooves. The second auxiliary spring 35, located between the 25, is fixed to the side closer to the second opening 24. The other end of the auxiliary spring 35 is fixedly connected to the second button 20. If you need to fold escalator 1, press the second button 20. Second auxiliary The 35 is pressed and forms a repulsive force. The second button 20 moves the pressing rod 27. The pressing rod 27 rotates the rotating block 28. The rotating block 28 rotates the rotating plate 3 Rotate 0. The rotating plate 30 drives the circular plate 31 to rotate. Circular plate 31 is pressed against the slide rod 29. The slide rod 29 is on the second chute 26 As it moves inward, the second spring 32 is pressed and forms a repulsive force. Slide rod 29 The transition rod 33 drives the moving rod 34 to retract into the horizontal pipe 2. The moving rod 34 pulls the pin rod 7 out from the jack 8 and into the connecting sleeve 6. It drives in a pulling motion. The link structure can be released and escalator 1 folds up. When this happens, the link structure automatically folds. When the second button 20 is released, the second auxiliary spring 35 The engagement with the second spring 32 ensures the return of the drive structure and the latch rod 7. Similarly, when ladder 1 is deployed, the link structure is also deployed, and the first link 4 and the second link 5 and The angle between the first link 4 and the second link 5 gradually increases until the angle between them becomes 180°. It becomes larger. In the process of the link structure rotating and unfolding, the second link 5 is inserted into the latch rod 7. The second is pressed against one end of the connecting sleeve 6, and its cross-section is set to be arc-shaped, Under the pressure of the link 5, the latch rod 7 retracts into the connecting sleeve 6, and the latch rod 7 moves. The rod 34 moves backward into the horizontal pipe 2. The moving rod 34 is a transition rod. The slide rod 29 is pulled into the second chute 26 via the do 33, and the second spring 3 Link 2 is pressed and forms a repulsive force. The angle between the first link 4 and the second link 5 is 180°. In that case, the pin rod 7 corresponds to the plug hole 8, and due to the repulsive force of the second spring 32, The pin rod 7 and the drive structure move and reset, and one of the connecting sleeves 6 is on the pin rod 7. The end is inserted through the plug hole 8, and the fixing between the first link 4 and the second link 5 is completed. The link structure is automatically locked after the human language ladder 1 is deployed.

[0009] Example 3: The difference from Example 1 is that the drive structure consists of a first button 9, a push rod 10, and two 1. It no longer includes a drive unit. Instead, as shown in Figures 11 to 14, The drive structure consists of two third drive units arranged symmetrically front to back. This includes a mounting sleeve 36, a slider 37, a third chute 38, and a tension rod 39. The mounting sleeve 36 is fixed inside the horizontal pipe 2. One end of the tension rod 39 is attached A third sprue is slidably connected and perforated within the sleeve 36, and is located between the inner bottom wall of the mounting sleeve 36. The ring 40 is fixedly connected. The other end of the tension rod 39 is inserted through the mounting sleeve 36. It is fixedly connected to the plug rod 7. The third chute 38 opens outwards on the outer wall of the horizontal pipe 2. It is installed. The third chute 38 extends laterally in the front and back directions and is connected to the inside of the horizontal pipe 2. It is passing through. Slider 37 slides back and forth along the third shot 38. Slider The bottom end of 37 is fixedly connected to the tension rod 39, and the tip of the slider 37 is connected to the third chute 38. A slide 41 is integrally formed to shield the third chute 38, and is inserted through the horizontal pipe 2. It is shaped as such. A vertical plate 42 is integrally molded to the tip of the slider 41. If you need to fold ladder 1, pinch the two vertical plates 42 with your fingers, and the two vertical The plates 42 are moved opposite each other. This allows the two sliders to move via the slider 41. Slider 37 moves in the opposite direction. Slider 37 slides along the third shot 38. Ida 37 moves the tension rod 39 toward the mounting sleeve 36. Tension rod 39 This drives the pin rod 7 and pulls it back into the connecting sleeve 6. At the same time, the third spring 40 is pressed This creates a repulsive force. The link structure can be untied, and escalator 1 folds up. Then the link structure automatically folds. After loosening the vertical plate 42, the third spring 40 Under repulsive force, the drive structure and pin rod 7 can be reset. Similarly, when ladder 1 is deployed, the link structure is also deployed, and the first link 4 and the second link 5 and The angle between the first link 4 and the second link 5 gradually increases until the angle between them becomes 180°. It becomes larger. In the process of the link structure rotating and unfolding, the second link 5 is inserted through the pin rod 7. The second ring is pressed against one end of the connecting sleeve 6, and its cross-section is set to be arc-shaped. Under the pressure of the 5, the pin rod 7 retracts into the connecting sleeve 6, and the pin rod 7 moves towards the tension rod 3. Move 9 into the mounting sleeve 36. The third spring 40 is pressed and forms a repulsive force. If the angle between the first link 4 and the second link 5 is 180°, then the pin rod 7 is Corresponding to the plug hole 8, the repulsive force of the third spring 40 causes the pin rod 7 and the drive structure to move. It is reset by moving it, and one end of the connecting sleeve 6 is inserted onto the pin rod 7 and then into the plug hole 8. Once inserted, the fixing between the first link 4 and the second link 5 is completed, and the link structure is the human language ladder 1. It will lock automatically after being deployed.

[0010] In the description of this invention, terms such as "top," "bottom," "inside," "outside," and "top / bottom edge" refer to The orientation or positional relationship is based on the orientation or positional relationship shown in the drawings and is not solely the present invention. This is to facilitate the explanation, and the device or element being referred to is in a specific direction, specific It is not composed of directions and does not indicate or suggest that it must be manipulated. Therefore, this cannot be understood as a limitation of the present invention. Furthermore, the terms "first" and "second" It is used solely for explanatory purposes and not to indicate or suggest relative importance. It is not understood. In describing the present invention, unless otherwise specifically defined and limited, the terms "mounting," "installation," and "installation" are used. Terms like "set / link" and "link" should be understood in a broad sense; for example, "link" can also mean a fixed set. The connection may be fixed, detachable, or integral. Often, mechanical connection is acceptable, electrical connection is acceptable, direct connection is acceptable, or an intermediate medium is acceptable. They may be connected indirectly through a body, or they may be connected internally to the two elements. This allows for a concrete understanding of the specific meanings of the above terms in the present invention. For those skilled in the art, the present invention is not limited to the details of the exemplary embodiments described above. Without departing from the spirit or fundamental features of the invention, the present invention may be implemented in other specific forms. It is clear that this can be expressed. Therefore, from any point of view, the embodiment The above description is illustrative and non-limiting, and the scope of the invention is as provided in the appended claims rather than in the above description. Because it is limited in this way, all variations that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention. The purpose is to allow any reference numeral within the claims to be used in the limited claims. It should not be considered a range. Furthermore, although this specification has described embodiments, each embodiment is not just one independent technical proposal. This does not include, and this form of description in the specification is simply for clarity, and will be clear to those skilled in the art. The detailed documents must be presented as a whole, and the technical proposals for each embodiment must be appropriately combined. It should be understood that other embodiments can be formed that can be understood by the person.

Claims

1. A ladder link fixing structure, It includes a horizontal pipe and two link structures, Both link structures are hinged between the two ladder bodies of the ladder and are arranged symmetrically front to back. Placed, The link structure includes a first link and a second link, The detached ends of the first and second links are hinged to the two ladder bodies of the ladder. Re, The other end of the first link is fixed to the connecting sleeve. A pin rod is slidably connected within a connecting sleeve. One end of the pin rod slides through the connecting sleeve, connecting to the first link. The other end of the second link and the first link are pivotally connected via a pin rod. The second link has an insertion hole for a connecting sleeve that can be inserted into the pin rod. The horizontal pipe is connected between two connecting sleeves, and communicates between the two connecting sleeves. Inside the horizontal pipe and the two connecting sleeves, two pin rods move while inside the connecting sleeves A drive structure is provided to pull back and create a repulsive force on the pin rod. Ladder link fixing structure.

2. A ladder link stabilization structure according to claim 1, The drive structure includes a first button, a push rod, and two first drive units. The two first drive units are each located within two connecting sleeves and are arranged symmetrically front to back. 、 The first drive unit comprises a push block, a fixed sleeve, and a moving block. The fixing sleeve is fixed inside the connecting sleeve. One end of the pin rod is slidably connected and inserted into the fixed sleeve, and is connected to the inner bottom wall of the fixed sleeve. A first spring is fixedly connected between them. The movable block is located inside the connecting sleeve, and the fixed sleeve is located outside the pin rod. The movable block is provided with a first inclined surface. The push block is located inside the connecting sleeve. The push block is equipped with a first chute that extends laterally to the left and right, and is aligned with the first inclined surface. A second inclined surface is provided, The push block moves left and right along the inner wall of the connecting sleeve, via the first chute. A slide sleeve is provided on the outside of the pin rod. The push rod moves from side to side along the inner wall of the horizontal pipe. The front and rear ends of the push rod are each drilled into two connecting sleeves, and each has two It is fixedly connected to the push block, One end of the first button is fixedly connected to the push rod. The other end of the first button is connected to a horizontal pipe by sliding and drilling a hole. Ladder link stabilization structure.

3. A ladder link stabilization structure according to claim 2, A first auxiliary spring is fixed between both ends of the push rod and the inner walls of the two connecting sleeves. They are connected, Ladder link stabilization structure.

4. A ladder link stabilization structure according to claim 1, The drive structure consists of a second button, a fixing sleeve, a mounting block, and two second drive units. And, equipped with, The fixing sleeve of the fixing sleeve is installed at an external intermediate position on the horizontal pipe. A first opening is provided in the outer wall of the fixed sleeve, which communicates with the interior. A second opening corresponding to a first opening that communicates with the interior of the horizontal pipe is provided. The mounting block is fixed inside the horizontal pipe. Two mounting grooves, arranged symmetrically front to back, are provided on the side of the mounting block closest to the second opening. A second chute is provided in the groove wall on the opposite side of the two mounting grooves. One end of the second button is located outside the fixing sleeve. The other end of the second button is slidably connected to the fixed sleeve via the first opening. The two second drive units are each provided symmetrically in front of and behind, corresponding to two mounting grooves. The second drive unit comprises a pressing rod, a rotating block, and a sliding rod. One end of the pressing rod is fixedly connected to the second button. The other end of the pressing rod is hinged to the rotating block. The other end of the rotating block is rotatably connected to the groove walls on both the upper and lower sides of the mounting groove via a rotating shaft, and two pieces Rotating plates are integrally molded and are spaced apart. A circular plate is integrally molded to one end of the detached rotating block on the two rotating plates. One end of the slide rod is slidably connected to the second chute and drilled, and the bottom of the groove of the second chute and A second spring is fixedly connected between them. The other end of the slider rod is fixed to the transition rod by drilling a hole in the second chute. A moving rod is fixed to the other end of the transition rod. The slide rod, transition rod, and moving rod are all mounted concentrically and coaxially. Furthermore, the cross-sectional area of ​​both the slide rod and the moving rod is larger than that of the transition rod. 、 The transition rod penetrates the gap between the two circular plates to interlock and connect them. The opposing sides of the slide rod and the moving rod are both attached to the outer wall of the circular plate. Re, Each of the two movable rods corresponds to two pin rods. The end of the moving rod that is away from the transition rod slides and connects to the mounting block. It is passed through, inserted into the connecting sleeve, and fixedly connected to the pin rod. Ladder link stabilization structure.

5. A ladder link stabilization structure according to claim 4, The mounting block has a second auxiliary spring located between the two mounting grooves, fixed to the side closer to the second opening. And so, The other end of the second auxiliary spring is fixedly connected to the second button. Ladder link stabilization structure.

6. A ladder link stabilization structure according to claim 1, The drive structure consists of two third drive units arranged symmetrically front to back. The third drive unit consists of a mounting sleeve, a slider block, a third chute, and a tension rod. Equipped with, The mounting sleeve is fixed inside the horizontal pipe. One end of the tension rod is slidably connected and inserted into the mounting sleeve, and the inner bottom wall of the mounting sleeve A third spring is fixedly connected between them. The other end of the tension rod is inserted into the mounting sleeve and fixedly connected to the pin rod. The third chute is opened on the outer wall of the horizontal pipe. The third chute is connected to the inside of a horizontal pipe that extends horizontally in the front and back directions. The slider slides back and forth along the third shot, The bottom end of the slider is fixedly connected to the tension rod. The tip of the slider is inserted into the horizontal pipe via the third chute. Ladder link stabilization structure.

7. A ladder link stabilization structure according to claim 6, A slider plate is integrally molded at the tip of the slider block to shield the third chute. And so, A vertical plate is integrally molded at the tip of the slide plate. Ladder link stabilization structure.

8. A ladder link stabilization structure according to any one of claims 1 to 7, The other end of the second link is pivotally connected to the first link and the connecting sleeve via a pin rod. ru, Ladder link stabilization structure.

9. A ladder link stabilization structure according to any one of claims 1 to 7, The outer wall of the connecting sleeve has an integrated positioning plate for positioning the second link. It is shaped, Ladder link stabilization structure.

10. A ladder link stabilization structure according to any one of claims 1 to 7, The pin rod slides through the first link and passes through one end of the connecting sleeve, and its cross-section is It is arc-shaped. Ladder link stabilization structure.

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