Mining connection type crawling ladder

Abstract

The invention discloses a mining connection type ladder stand which comprises a plurality of H-shaped ladder units, each ladder unit comprises a transverse rod and two longitudinal rods connected through the transverse rod, and the longitudinal rods of the ladder units are connected through connecting sleeves to form ladders with different lengths in series; a magnetic conductive layer is arranged on the whole inner wall covering each connecting sleeve, and a through hole is formed in the outer wall of each connecting sleeve in the direction towards the center of the connecting sleeve; the two ends of each longitudinal rod are columnar butt joint sections, and annular magnets are coaxially embedded in the centers of the end faces of the butt joint sections. The annular magnet and the magnetic conductive layer are used for mutual adsorption so as to guide coaxial installation of the longitudinal rod and the connecting sleeve; the ladder further comprises a plug pin which is used for being inserted into the through hole so as to abut against the two longitudinal rods located in the connecting sleeve, and axial limiting of the two ladder units is achieved. The problem that an existing traditional connecting type crawling ladder is low in connecting and assembling efficiency is solved.

Description

[Technical field]

[0001] The invention belongs to the technical field of high-altitude working equipment for mines, and in particular relates to a connected ladder for mines. [Background technology]

[0002] In high-altitude work scenarios such as mines and construction, traditional assembled ladders are key facilities to ensure the passage of personnel up and down, but their assembly efficiency is extremely low. The alignment and connection between ladder sections is difficult and relies entirely on the operator's personal experience. In dim environments such as underground mines, insufficient light makes it difficult for operators to clearly identify the connection parts of the ladder sections, greatly increasing the difficulty of alignment; and in some narrow spaces at construction sites, the limited operating space further hinders the operator's movements. According to statistical analysis of actual operating time, in such environments, the time spent on adjusting the alignment of ladder sections alone accounts for more than 40% of the overall assembly operation time, which seriously slows down the progress of the project and reduces construction efficiency. Moreover, the length of the assembled ladder is relatively single and fixed, and cannot be applied to more application scenarios at operating heights. [Summary of the invention]

[0003] The purpose of the present invention is to provide a connection type ladder for mining, so as to solve the problem of low connection and assembly efficiency of the existing traditional connection type ladder.

[0004] The present invention adopts the following technical scheme: a mine-use connected ladder, comprising a plurality of H-shaped ladder units, each ladder unit comprising a crossbar and two longitudinal bars connected by the crossbar, the longitudinal bars of the plurality of ladder units being connected in series by connecting sleeves to form ladders of different lengths;

[0005] A magnetic conductive layer is provided to cover the entire inner wall of each connecting sleeve, and a through hole is opened on the outer wall of the connecting sleeve in the direction of the center thereof;

[0006] Both ends of each longitudinal rod are columnar docking sections, and an annular magnet is coaxially embedded at the center of the end surface of the docking section; the annular magnet and the magnetic conductive layer are used to attract each other to guide the coaxial installation of the longitudinal rod and the connecting sleeve;

[0007] It also includes a latch pin which is inserted into the through hole to support the two longitudinal rods in the connecting sleeve to achieve axial limitation of the two ladder units.

[0008] Furthermore, two guide grooves are arranged on the outer wall surface of the docking section along its axial direction and symmetrically about its center; the inner wall of each connecting sleeve is provided with two rows of raised ribs protruding toward the center along its axial direction, and the raised ribs are used to engage with the guide grooves at corresponding positions to prevent rotation between the longitudinal rod and the connecting sleeve.

[0009] Furthermore, the guide groove is in an inverted V-shaped structure, and the raised rib is in a positive V-shape matching the shape of the guide groove.

[0010] Furthermore, the latch includes a top plate, which is connected to the handle via a screw rod, and a countersunk hole is provided at one end of the through hole close to the inner wall of the connecting sleeve, and the top plate and the screw rod of the latch are used to be pre-installed in the countersunk hole and the through hole.

[0011] Furthermore, the top plate is rectangular, and its longer side is arranged along the axial direction of the connecting sleeve to ensure that the top plate is pushed inward and can support the two longitudinal rods located in the connecting sleeve at the same time.

[0012] Furthermore, the angle between the axis of the through hole of the connecting sleeve and the axial direction of the connecting sleeve is 75°.

[0013] Furthermore, the length of the longitudinal rod of the ladder unit is designed to be of various sizes.

[0014] The second technical solution adopted by the present invention is a method for assembling a mine-connected ladder, based on the claim of a mine-connected ladder, comprising the following contents:

[0015] Rotate the latch outwards so that the top plate is placed in the countersunk hole;

[0016] Insert the butt joint sections of two adjacent preassembled ladder units into both ends of the connecting sleeve;

[0017] When the butt joint section approaches the connecting sleeve, the annular magnet and the magnetic conductive layer generate an adsorption force, pulling the ladder unit to automatically approach; after the guide groove contacts the raised rib, it guides the ladder section to rotate to the correct angle;

[0018] The latch is screwed inwardly to make the top plate support the two longitudinal rods in the connecting sleeve at the same time, thus completing the assembly of the two adjacent ladder units.

[0019] The beneficial effects of the present invention are as follows: the present invention realizes magnetic attraction and guidance of the docking end and the connecting sleeve by setting an annular magnet and a magnetic conductive layer, and the magnetic attraction coupling enables the multi-section ladder unit to automatically adsorb and align within a distance of about 30 cm, saving 70% of time compared with the traditional manual adjustment method, realizing accurate alignment of the ladder sections by blind operation, and reducing the dependence on the skills of the operators; at the same time, through the cooperation of the inverted V-shaped guide groove and the raised rib, the angle deviation of ±5° can be automatically corrected to avoid local stress concentration caused by inaccurate alignment, greatly improving the assembly efficiency of the connected ladder. At the same time, by designing the longitudinal rod length of the ladder unit into a variety of different sizes, ladders of different heights can be freely assembled according to the height of the work site, which is convenient and fast, and can well meet the needs of different high-altitude work scenes.

Brief Description of the Drawings

[0020] Figure 1 This is a structural schematic diagram of a mining connection ladder of the present invention;

[0021] Figure 2 is a schematic cross-sectional view of a docking section of the present invention;

[0022] Figure 3 is a schematic cross-sectional view of a connecting sleeve of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the latch of the present invention;

[0024] Figure 5 for Figure 4 Top view of the .

[0025] Wherein: 1. ladder unit, 101. docking section, 102. annular magnet, 103. guide groove, 104. longitudinal rod, 105. transverse rod;

[0026] 2. Connecting sleeve, 201. Through hole, 202. Raised rib, 203. Countersunk hole;

[0027] 3. Latch, 301. Top plate, 302. Screw, 303. Handle. [Specific implementation method]

[0028] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] The present invention provides a mine-use connecting ladder, such as Figure 1 As shown, it includes a plurality of H-shaped ladder units 1, each ladder unit 1 includes a crossbar 105 and two longitudinal bars 104 connected by the crossbar 105, and the longitudinal bars 104 of the plurality of ladder units 1 are connected in series by a connecting sleeve 2 to form ladders of different lengths;

[0030] A magnetic conductive layer is provided to cover the entire inner wall of each connecting sleeve 2, and a through hole 201 is opened on the outer wall of the connecting sleeve 2 toward its center; the through hole 201 is processed with spiral anti-slip grooves circumferentially, and the spiral anti-slip grooves can still provide stable gripping force in rainy days or oily environments, and the friction coefficient is maintained above 0.4.

[0031] Both ends of each longitudinal rod 104 are columnar docking sections 101, and an annular magnet 102 is coaxially embedded at the center of the end face of the docking section 101; the thickness of the magnetic conductive layer is 0.5-1mm, and the surface of the magnetic conductive layer and the contact area of ​​the guide groove 103 are sandblasted, with a roughness of Ra = 3.2μm, which improves the mechanical guidance stability. The annular magnet 102 and the magnetic conductive layer are used to adsorb each other to guide the coaxial installation of the longitudinal rod 104 and the connecting sleeve 2; when the longitudinal rod 104 is close to the connecting sleeve 2, the magnetic attraction acts on the magnetic conductive layer on the inner wall of the sleeve 2 to ensure the correct installation between the longitudinal rod 104 and the connecting sleeve 2 and avoid skewed adsorption.

[0032] The ladder also includes a latch 3 for inserting into the through hole 201 to support the two longitudinal rods 104 in the connecting sleeve 2 to achieve axial positioning of the two ladder units 1. The latch 3 is threadedly connected to the through hole 201.

[0033] In some embodiments, Figure 2 As shown, two guide grooves 103 are arranged on the outer wall surface of the docking section 101 along its axial direction and symmetrically about its center; the guide grooves 103 do not intersect with the annular magnet 102; Figure 3 As shown, the inner wall of each connecting sleeve 2 is provided with two rows of raised ribs 202 protruding toward the center along its axial direction, and the raised ribs 202 are used to engage with the guide grooves 103 at the corresponding positions to prevent the longitudinal rod 104 and the connecting sleeve 2 from rotating. It is used for mechanical alignment and correction, and does not participate in the magnetic attraction function.

[0034] In some embodiments, the guide groove 103 is in an inverted V-shaped structure, and the raised rib 202 is in a positive V-shaped structure that matches the shape of the guide groove 103. This realizes automatic deviation correction and alignment when adjacent ladder units are inserted.

[0035] The present invention is divided into coarse and fine stage positioning, stage 1-magnetic coarse positioning: magnetic force makes the longitudinal rod 104 roughly align with the connecting sleeve 2 along the axis, with an error range of ±15°; stage 2-mechanical fine positioning: the guide groove 103 contacts the raised rib 202, and guides the rotation of the longitudinal rod 104 of the ladder unit 1 through the inverted V-shaped slope, and finally corrects the angle deviation to within ±2°. This structure breaks through the limitations of traditional pure mechanical or pure magnetic attraction solutions, and achieves "blind operation" level assembly accuracy through the hierarchical coordination of magnetic coarse positioning and mechanical fine positioning.

[0036] In some embodiments, Figure 4 and Figure 5 As shown, the latch 3 includes a top plate 301, the top plate 301 is connected to the handle 303 through a screw rod 302, and a countersunk hole 203 is provided at one end of the through hole 201 close to the inner wall of the connecting sleeve 2. The top plate 301 and the screw rod 302 of the latch 3 are used to be pre-installed in the countersunk hole 203 and the through hole 201. When installing the longitudinal rod 104, the top plate 301 is retracted into the countersunk hole 203, and the longitudinal rod 104 can be smoothly inserted into the connecting sleeve 2, and then the latch 3 is rotated inward to support the longitudinal rod 104, so that the longitudinal rod 104 can be limited in the axial direction.

[0037] In some embodiments, the top plate 301 is a rectangular curved plate, and its longer side is arranged along the axial direction of the connecting sleeve 2, so as to ensure that when the top plate 301 is pushed inward, it can simultaneously support the two longitudinal rods 104 located in the connecting sleeve 2. The countersunk hole is correspondingly configured to be able to place the rectangular top plate 301. The curvature of the rectangular curved plate matches the longitudinal rod 104, so that when the two are in contact, they can better fit each other.

[0038] In some embodiments, the angle between the axis of the through hole 201 of the connecting sleeve 2 and the axis direction of the connecting sleeve 2 is 75°. This configuration enables the plug 3 to form an oblique locking force after being inserted into the through hole 201 to resist the longitudinal shear load.

[0039] In some embodiments, the length of the longitudinal rod of the ladder unit 1 is designed to be of various sizes, such as 2.4 meters, 1.2 meters, and 0.6 meters. In actual use, the ladder units 1 of different sizes can be freely assembled according to the height of the work site, and ladders of different heights can be assembled, which is convenient and fast and can well meet the needs of different high-altitude work scenes.

[0040] The present invention provides an assembly method of a mine-used connected ladder, comprising the following contents:

[0041] Rotate the latch pin 3 outwards to place the top plate 301 in the countersunk hole 203;

[0042] Insert the butt joint sections 101 of two adjacent preassembled ladder units 1 into both ends of the connecting sleeve 2;

[0043] When the docking section 101 approaches the connecting sleeve 2, the annular magnet 102 generates an adsorption force with the magnetic conductive layer, pulling the ladder unit 1 to automatically approach; after the guide groove 103 contacts the raised rib 204, the ladder section is guided to rotate to the correct angle;

[0044] The latch pin 3 is screwed inwardly so that the top plate 301 simultaneously supports the two longitudinal rods 104 in the connecting sleeve, thus completing the assembly of the two adjacent ladder units 1.

[0045] Example

[0046] Select 2 ladder units, each longitudinal rod 104 is 1.2m long, and prepare a connecting sleeve 2;

[0047] Place the ladder unit 1 horizontally, with the butt joint section 101 facing the connecting sleeve 2;

[0048] Rotate the latch pin 3 outwards to place the top plate 301 in the countersunk hole 203;

[0049] When the docking section 101 is within 2 to 30 cm of the connecting sleeve, the annular magnet 102 generates an adsorption force with the magnetic conductive layer, pulling the ladder unit 1 to automatically approach; after the inverted V-shaped guide groove 103 contacts the raised rib 204, the ladder section is guided to rotate to the correct angle with an error of ≤±2°;

[0050] The latch pin 3 is screwed inwardly to make the top plate 301 support the two longitudinal rods 104 in the connecting sleeve at the same time, thus completing the assembly of the two ladder units.

Claims

1. A mining connected ladder, characterized in that: It comprises a plurality of H-shaped ladder units (1), each of the ladder units (1) comprising a crossbar (105) and two longitudinal bars (104) connected by the crossbar (105), and the longitudinal bars (104) of the plurality of ladder units (1) are connected in series by a connecting sleeve (2) to form ladders of different lengths; A magnetic conductive layer is provided to cover the entire inner wall of each connecting sleeve (2), and a through hole (201) is provided on the outer wall of the connecting sleeve (2) in a direction toward the center thereof; Both ends of each longitudinal rod (104) are columnar docking sections (101), and an annular magnet (102) is coaxially embedded at the center of the end surface of the docking section (101); the annular magnet (102) and the magnetic conductive layer are used to attract each other to guide the coaxial installation of the longitudinal rod (104) and the connecting sleeve (2); It also comprises a latch (3) for inserting into the through hole (201) to support the two longitudinal rods (104) located in the connecting sleeve (2) to achieve axial limitation of the two ladder units (1).

2. A mining connection ladder as claimed in claim 1, characterized in that: Two guide grooves (103) are arranged on the outer wall surface of the docking section (101) along its axial direction and symmetrically about its center; and two rows of raised ribs (202) are arranged on the inner wall of each connecting sleeve (2) along its axial direction and protrude toward the center, and the raised ribs (202) are used to engage with the guide grooves (103) at corresponding positions to prevent the longitudinal rod (104) and the connecting sleeve (2) from rotating.

3. A mining connection ladder as claimed in claim 2, characterized in that: The guide groove (103) is in an inverted V-shaped structure, and the raised rib (202) is in a positive V-shape matching the shape of the guide groove (103).

4. A mining connection ladder as claimed in any one of claims 1 to 3, characterized in that: The latch (3) comprises a top plate (301), the top plate (301) being connected to a handle (303) via a screw rod (302), the through hole (201) being provided with a countersunk hole (203) at one end close to the inner wall of the connecting sleeve (2), and the top plate (301) and the screw rod (302) of the latch (3) being used for being pre-installed in the countersunk hole (203) and the through hole (201).

5. A mining connection ladder as claimed in claim 4, characterized in that: The top plate (301) is a rectangular bent plate, and its longer side is arranged along the axial direction of the connecting sleeve (2) to ensure that the top plate (301) is pushed inward and can simultaneously support the two longitudinal rods (104) located in the connecting sleeve (2).

6. A mining connection ladder as claimed in claim 4, characterized in that: The angle between the axis of the through hole (201) of the connecting sleeve (2) and the axis direction of the connecting sleeve (2) is 75°.

7. A mining connection ladder as claimed in any one of claims 1 to 3, characterized in that: The length of the longitudinal rod of the ladder unit (1) is designed to have a variety of different sizes.

8. A method for assembling a connected ladder for mining, characterized in that: A mining connected ladder according to any one of claims 1 to 7, comprising the following contents: The latch pin (3) is rotated outward to place the top plate (301) in the countersunk hole (203); Inserting the butt joint sections (101) of two adjacent preassembled ladder units (1) into both ends of the connecting sleeve (2); When the docking section (101) approaches the connecting sleeve (2), the annular magnet (102) and the magnetic conductive layer generate an adsorption force, pulling the ladder unit (1) automatically closer; after the guide groove (103) contacts the raised rib (204), the ladder section is guided to rotate to a correct angle; The latch (3) is screwed inwardly to make the top plate (301) support the two longitudinal rods (104) located in the connecting sleeve at the same time, thus completing the assembly of two adjacent ladder units (1).

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