CN107255015B

CN107255015B - Combined foldable step ladder for subway tunnel

Info

Publication number: CN107255015B
Application number: CN201710666404.8A
Authority: CN
Inventors: 周生喜; 牟松; 段文军; 章龙管; 钱政; 梁小龙; 孔令喜
Original assignee: China Railway Engineering Service Co Ltd
Current assignee: China Railway Engineering Service Co Ltd
Priority date: 2017-08-07
Filing date: 2017-08-07
Publication date: 2023-01-06
Anticipated expiration: 2037-08-07
Also published as: CN107255015A

Abstract

The invention provides a combined type foldable step ladder for a subway tunnel, which comprises a supporting device and a step ladder; the supporting device comprises a clamping piece, a plate, a member, a supporting beam and a cross beam; the clamping piece is connected and fixed on the plate, the plate is connected and fixed on the member, the member is arranged on the supporting beam, and the supporting beam is connected with the cross beam; the cross beam is formed by hinging a left part and a right part, so that the cross beam can be folded; the step ladder comprises a pedal and a ladder beam, wherein the pedal is formed by hinging two step ladder blocks which are symmetrical left and right through a first hinge, so that the pedal can be folded; the ladder beam is formed by hinging two vertically symmetrical parts through a second hinge, so that the ladder beam can be folded, two back-off pieces are designed at positions close to two sides of the second hinge, and the ladder beam is inserted into the back-off holes in the cross beam through the back-off pieces, so that the whole ladder is arranged on the supporting device; a plurality of sinking grooves are distributed on the inner side of the ladder beam, and the folded step block is embedded into the sinking grooves; when the device is used, the supporting device is matched with the step ladder, so that the step ladder can be suspended on the tunnel pipe sheet for use.

Description

Combined foldable step ladder for subway tunnel

Technical Field

The invention relates to the technical field of steps, in particular to a combined type foldable step ladder for a subway tunnel.

Background

The step ladder is a maintenance apparatus which is very commonly used, and the application range of the step ladder is very wide, and the step ladder is often used indoors or outdoors, on the ground or underground. Therefore, the step ladder has a plurality of styles, including the most common straight step ladder which leans against the wall and can be used only by leaning against the wall or supporting other objects; there are also the more common herringbone ladders which can be used by their own structure. No matter the ladder is a straight-line ladder or a herringbone ladder, no matter the ladder is a simple non-foldable type or a foldable type, the occupied space or the size of the folded space is large, and the ladder is inconvenient to store and carry. During the construction of the subway tunnel, due to the fact that circuits are frequently overhauled, a herringbone ladder tool is needed, in the tunnel, the operation needs to be stopped when the muck transport vehicle is transported back and forth, the herringbone ladder is placed to the position parallel to the tunnel track, the transport vehicle can conveniently pass through the tunnel, the construction operation is influenced, and the potential safety hazard is large. Therefore, the invention aims to design a combined type foldable step ladder which does not influence the normal operation of workers according to the actual situation of the construction tunnel. The step ladder has certain practical significance and popularization value for improving the working efficiency of workers for overhauling the circuit and reducing the construction risk.

Disclosure of Invention

The invention aims to solve the problems that: the circuit is often overhauled during subway tunnel construction, this needs double ladder instrument, but in the tunnel, the back and forth transportation of dregs transport vechicle needs to stop the operation on the way to lay the double ladder to the position parallel with the tunnel track, so that the transport vechicle passes through, this not only influences the construction operation and still has great potential safety hazard. The combined type foldable step ladder for the subway tunnel provided by the invention belongs to a combined type step ladder with a single-row folding and supporting device, can be folded in the transverse direction and the longitudinal direction, and is provided with the supporting platform matched with the step ladder for use, so that the step ladder can be suspended for use on a tunnel pipe piece, the working efficiency of workers is improved, the construction risk is reduced, the occupied space of the step ladder during use is reduced, and the combined type foldable step ladder is convenient to carry.

The technical scheme of the invention is as follows:

combined type foldable step ladder for subway tunnels comprises a supporting device and a step ladder, wherein the supporting device comprises a clamping piece, a connecting piece, a supporting beam and a cross beam.

The clamping piece comprises a clamping piece A and a clamping piece B; the clamping piece A is used for bearing the pressure of a connecting rod nut in a tunnel segment bolt and is integrally a rectangular plate, double-lug-shaped mounting seats are arranged at the middle part of the clamping piece A close to the edges of two sides, a U-shaped hole is formed in the middle part of the clamping piece A and used for being sleeved in the connecting rod nut in the tunnel segment bolt, two hinge holes are formed in the positions of two end points of the U-shaped hole, a rectangular bottom plate is arranged in the middle of the hole, and two small holes which are transversely arranged are formed in the middle part of the bottom plate and used for mounting elastic strips.

The clamping piece B is used for bearing pressure and friction force of the tunnel arc-shaped wall to the clamping piece B, and comprises a rectangular plate C, an arc-shaped plate and a rectangular plate D, double lug-shaped mounting seats are designed at the middle part of the rectangular plate C close to the edges of the two sides, two transversely-arranged small holes are formed in the positions between the mounting seats and used for mounting elastic strips, a hole in the shape of a hole is formed in the left part of the rectangular plate C, and the hole is used for being sleeved with a connecting rod nut in a tunnel segment bolt. The seamless fixed connection of rectangle board D right-hand member is in rectangle board C intermediate position department, and its central point puts the department and opens there is the U font hole, seamless fixed connection in rectangle board C and rectangle board D of arc for holder B left side part is fan-shaped structure.

The clamping piece A and the clamping piece B are connected by penetrating through the transversely arranged small holes through elastic strips and are hinged and fixed by penetrating through double-lug-shaped mounting seats at the middle part of the clamping piece close to the edges of the two sides through pins.

Supporting beam both ends all car has the screw thread for the degree of depth of the accessible screw thread screw in between two holders about the supporting beam is adjusted, and still design the cylindrical protruding structure in the position department of being close to supporting beam screw thread end, protruding structure car has the screw thread for connect the crossbeam, fix through nut screw in protruding structure.

The connecting piece includes a plate and a connecting piece plate and a supporting beam's component, the plate both ends all design the flange that has the symmetric distribution and the hinge hole that is located flange central point and puts, and the hinge hole of left end and holder A's hinge hole pass through pin junction and fix, and the hinge hole of right-hand member passes through pin junction with the round hole of component and fixes.

The component is formed by seamless fixed connection of a cylinder and a rectangular plate-shaped structure, an internal thread is turned in the cylinder and is in threaded connection with a supporting beam, so that the distance between an upper clamping piece and a lower clamping piece can be adjusted through adjusting the screw-in depth of the threads, two round holes are formed in the rectangular plate-shaped structure close to two ends of the rectangular plate-shaped structure and are in pin connection with a hinge hole at the right end of the plate, and the plate and the component are fixedly connected.

The crossbeam is formed by controlling two parts are articulated for the crossbeam is collapsible, and articulated department design has the locking piece for when preventing two sections crossbeam parallel expansion, make strutting arrangement rock because of its rotation, the locking piece is irregular U font, and one section is long, and one section is short, and long one section car has the screw thread, and crossbeam both sides evenly distributed has the back-off hole, the back-off hole is used for installing the back-off piece on the step ladder roof beam, makes the step ladder can fix on strutting arrangement, and crossbeam lower surface still evenly distributed has the locating hole, the locating hole be used for with prop up the protruding structural connection on the supporting beam, can adjust strutting arrangement's distance about through choosing different locating holes on the crossbeam.

The supporting device is suitable for subway tunnels with segment bolts of different lengths and different intervals, and supports the step ladder to be placed at different positions of the cross beam so as to enlarge the overhauling range of users.

The step ladder comprises a pedal and a ladder beam. The footboard is formed through first hinge is articulated by two ladder pieces of bilateral symmetry, the ladder piece design is the hollow body, two pages of first hinge are together fixed with the lower terminal surface of controlling the ladder piece respectively, the axis of first hinge and the rectangle terminal surface of two ladder pieces are in a vertical plane, and two ladder pieces imbed respectively about in the heavy inslot of two ladder roof beams after folding.

The one end that the ladder roof beam was connected to the step piece designs into the semicircle cambered surface, and the semicircle cambered surface is tangent with step piece terminal surface and with the lower surface adjacent of terminal surface respectively for when the step is folding the one end of step piece can rotate and can not take place to interfere with the ladder roof beam round its articulated department with the ladder roof beam, semicircle face centre of a circle department still designs the hinge hole who uses with the ladder roof beam is articulated.

The ladder roof beam is formed by the articulated second hinge of two parts of longitudinal symmetry, and is close to hinge both sides department design and has two back-off pieces, back-off piece is located the upper and lower two parts of ladder roof beam respectively, distributes on same straight line for install the step ladder on strutting arrangement, the ladder roof beam design is the hollow body, and its inboard distributes has a plurality of heavy grooves, the length that heavy groove height ratio step piece is longer slightly, and the purpose is in order to make the smooth embedding of step piece after folding heavy inslot.

The invention has the beneficial effects that: the combined foldable step ladder for the subway tunnel belongs to a combined step ladder with a single-row folding and supporting device, can be folded in the transverse direction and the longitudinal direction, and is designed with a supporting platform matched with the step ladder, so that the step ladder can be used in a suspended mode on a tunnel pipe piece, the problem that the working efficiency of workers is reduced due to the fact that muck trucks are transported back and forth in the construction process is solved, the construction risk is reduced, the occupied space when the step ladder is used is reduced, and the combined foldable step ladder is convenient to carry.

Drawings

Fig. 1 is a front view of a combined type foldable step ladder for a subway tunnel according to the present invention.

Fig. 2 is a side view of the combined type collapsible stairway for a subway tunnel according to the present invention.

Fig. 3 is a front view of the combined collapsible step ladder for subway tunnels according to the present invention.

Fig. 4 is a perspective view of the combined type foldable step ladder clamping piece A for the subway tunnel.

Fig. 5 is a perspective view of the combined type foldable step ladder clamping piece B for the subway tunnel.

Fig. 6 is a perspective view of the combined type foldable step ladder component for subway tunnels according to the present invention.

Fig. 7 is a perspective view of the combined type foldable step ladder locking piece for subway tunnels according to the present invention.

Description of reference numerals: 1. a support beam; 2. a cross beam; 3. a clamping member A; 4. a clamping member B; 5. a locking member; 6. a protruding structure; 7. a step block; 8. a ladder beam; 9. a first hinge; 10. a second hinge; 11. an elastic strip; 12. a plate member; 13. a member; 14. a rectangular plate C; 15. an arc-shaped plate; 16. rectangular board D.

Detailed Description

In order to facilitate an understanding of the invention, reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings.

The invention comprises a supporting device and a step ladder; the supporting device comprises a clamping piece, a plate 12, a member 13, a supporting beam 1 and a cross beam 2; the clamping piece comprises a clamping piece A3 and a clamping piece B4, the clamping piece A3 is connected with the clamping piece B4 through an elastic strip 11 and is hinged and fixed through a pin penetrating through a double-lug-shaped mounting seat of the clamping piece, the clamping piece A3 is connected and fixed at the left end of the plate 12 to realize the connection and fixation of the clamping piece and the plate 12, the right end of the plate 12 is hinged and fixed with a member 13, the member 13 is installed on the supporting beam 1 through thread fit, and the screwing-in depth can be automatically adjusted according to actual requirements; the supporting beam 1 is provided with two supporting beams, the four end points are provided with the members 13, the lower parts of the four end points are provided with the protruding structures 6, and the protruding structures 6 are fixedly connected with the positioning holes of the cross beam 2, so that the supporting beam 1 is fixed on the cross beam 2; the number of the cross beams 2 is two, the cross beams 2 are provided with a plurality of positioning holes, and the positioning holes can be selected automatically according to actual needs to adjust the left-right distance of the supporting device; the beam 2 is formed by hinging a left part and a right part, so that the beam 2 can be folded, and the hinged part is fixed by a locking piece 5, so that the supporting device cannot shake due to the rotation of the left part and the right part when the left part and the right part are unfolded in parallel;

the step ladder comprises a pedal and a ladder beam, wherein the pedal is formed by hinging two step blocks 7 which are bilaterally symmetrical through a first hinge 9, one end of each step block 7 connected with the ladder beam 8 is designed to be a semi-circular arc surface, and the semi-circular arc surfaces are respectively tangent with the end surface of each step block 7 and the lower surface adjacent to the end surface, so that when the step ladder is folded, one end of each step block 7 can rotate around the hinged part of the step block 7 and the ladder beam 8 and cannot interfere with the ladder beam 8; the ladder beam 8 is formed by hinging two vertically symmetrical parts through a second hinge 10, two back-off pieces are designed at positions close to two sides of the hinge 9 and are respectively positioned at the upper part and the lower part of the ladder beam 8, and the ladder beam 8 is inserted into the back-off holes in the cross beam 2 through the back-off pieces, so that the whole ladder is arranged on the supporting device; a plurality of sinking grooves are distributed on the inner side of the ladder beam 8, and the height of the sinking grooves is slightly longer than the length of the step block 7, so that the folded step block 7 is smoothly embedded into the sinking grooves.

When the device is used, firstly, the supporting device is installed to adapt to the vertical distance of the end part of a segment bolt and the left-right distance of the bolt, the vertical distance can be adjusted through the depth of the adjusting component 13 screwed into the supporting beam 1, the left-right distance can be adjusted through selecting different positioning holes on the cross beam 2, after the distance is determined, the locking piece 5 is locked, then, the clamping pieces are installed on the segment bolt one by one from top to bottom, during installation, the hand of a user exerts force to clamp the clamping piece A3 and the clamping piece B4 to a certain angle, the clamping piece A3 is required to be arranged on the upper part, the clamping piece B4 is required to be arranged on the lower part, then the clamping pieces are tried to be pushed into the arc-shaped grooves until the clamping piece A3 can be sleeved on a connecting rod nut in the segment bolt, finally, the folding step ladder is unfolded, the inverted fasteners on the ladder beam 8 are inserted into the inverted fasteners on the cross beam, the two inverted fasteners are respectively arranged on the upper part and the lower part of the ladder beam 8 and are distributed on the same straight line, and the ladder beam 8 is not folded in the using process.

When folding, the step is first taken off the support device and then folded. The first mode is that the step ladder block 7 is folded, the two ladder beams 2 are held to be close to the middle, and the step ladder block 7 is folded and embedded into the ladder beams 8; the second kind is that ladder beam 8 is folding, because the step ladder has taken off from strutting arrangement this moment, the back-off piece on ladder beam 8 does not detain the back-off hole on the crossbeam 2, is in mobile state, so directly folding can, the third kind is folding step ladder piece 7 and ladder beam 8 simultaneously, but must fold step ladder piece 7 earlier, folding ladder beam 8 again. Finally, the clamping pieces and the cross beam 2 are taken down one by one from bottom to top. If it is desired to fold the cross member 2, the locking member 5 is removed and can be folded.

Claims

1. Subway tunnel is with collapsible step of combination formula, including supporting beam (1), crossbeam (2), holder, locking piece (5), protruding structure (6), step piece (7), ladder roof beam (8), first hinge (9), second hinge (10), elastic strip (11), plate (12) and component (13), its characterized in that: the clamping piece comprises a clamping piece A (3) and a clamping piece B (4), the clamping piece B comprises a rectangular plate C (14), an arc-shaped plate (15) and a rectangular plate D (16), and the cross beam (2) is provided with a plurality of positioning holes;

the clamping piece A (3) is integrally a cuboid plate, a U-shaped hole is formed in the middle of the clamping piece A, two hinge holes are formed in the two end points of the U shape, a cuboid bottom plate is arranged in the middle of the hole, two small holes which are transversely arranged are formed in the middle of the bottom plate, the clamping piece A (3) and the clamping piece B (4) are connected through elastic strips (11) and are hinged and fixed through pins penetrating through double lug-shaped mounting seats which are located in the middle of the clamping piece and close to the edges of the two sides, the clamping piece A (3) is connected and fixed to the left end of the plate (12), the clamping piece A and the plate (12) are connected and fixed, the right end of the plate (12) is hinged and fixed with the members (13), the plate (12) is mounted at the two ends of the supporting beam (1), the supporting beam (1) is provided with two members (13), protruding structures (6) are arranged below the four end points, the protruding structures (6) are connected and fixed with the beam (2), so that the supporting beam (1) is fixed to the beam (2), the left and the right ends of the beam (5) can be hinged and folded;

the pedal is formed by hinging two step blocks (7) which are symmetrical left and right through a first hinge (9); ladder roof beam (8) are formed through second hinge (10) are articulated by two parts of upper and lower symmetry, and are close to second hinge (10) both sides department design and have two back-off pieces, and ladder roof beam (8) are through the back-off hole on back-off piece insertion crossbeam (2) for whole step is installed on strutting arrangement.

2. The combined foldable step ladder for subway tunnels according to claim 1, wherein: holder B (4) comprise rectangular plate C (14), arc (15) and rectangular plate D (16), rectangular plate C (14) middle part design has two ears shape mount pads, position department between the mount pad opens has two transverse arrangement's aperture, rectangular plate C (14) left part is opened there is the hole that is the strip hole form, rectangular plate D (16) seamless fixed connection in rectangular plate C (14) intermediate position department, and open its central point department has U font hole, seamless fixed connection in rectangular plate C (14) and rectangular plate D (16) arc (15) for holder B (4) the left side part is fan-shaped structure.

3. The combined foldable step ladder for subway tunnels according to claim 1, wherein: the locking piece (5) is in an irregular U shape, and is long in one section and short in one section, and threads are turned on the long section.

4. The combined type foldable step ladder for the subway tunnel according to claim 1, wherein: the component (13) is formed by seamless fixed connection of a cylinder and a rectangular plate-shaped structure, an internal thread is turned in the cylinder, two round holes are formed in the rectangular plate-shaped structure close to two ends of the rectangular plate-shaped structure, and the round holes are connected with a hinge hole in the right end of the plate through pins.

5. The combined foldable step ladder for subway tunnels according to claim 1, wherein: back-off holes are uniformly distributed in two sides of the cross beam (2), and positioning holes are also uniformly distributed in the lower surface of the cross beam.

6. The combined foldable step ladder for subway tunnels according to claim 1, wherein: the ladder beam (8) is a hollow body, a plurality of sinking grooves are distributed on the inner side of the ladder beam, and the height of the sinking grooves is slightly longer than the length of the ladder blocks (7).

7. The combined type foldable step ladder for the subway tunnel according to claim 1, wherein: the ladder is characterized in that the step block (7) is a hollow body, one end, connected with the ladder beam (8), of the step block (7) is designed to be a semicircular arc surface, the semicircular arc surface is tangent to the end face of the step block (7) and the lower surface adjacent to the end face, and a hinge hole is formed in the circle center of the semicircular arc surface.