CN111997514A - Double ladder convenient to transport - Google Patents
Double ladder convenient to transport Download PDFInfo
- Publication number
- CN111997514A CN111997514A CN202010845503.4A CN202010845503A CN111997514A CN 111997514 A CN111997514 A CN 111997514A CN 202010845503 A CN202010845503 A CN 202010845503A CN 111997514 A CN111997514 A CN 111997514A
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- Prior art keywords
- sliding
- supporting rod
- herringbone ladder
- groove
- fixing
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/14—Ladders capable of standing by themselves
- E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
- E06C1/18—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as ladders
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/397—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders characterised by having wheels, rollers, or runners
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/50—Joints or other connecting parts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
The invention discloses a herringbone ladder convenient to carry, which comprises: the side surface of the herringbone ladder main body is provided with a fixing component; the fixing assembly comprises a pair of fixing shafts extending outwards along the side direction of the herringbone ladder main body, and the two fixing shafts are arranged along the length direction of the herringbone ladder main body; the carrying device comprises a first rotating assembly and a second rotating assembly; the inner end of the first rotating component is hinged on one of the fixed shafts of the fixed component; the inner end of the second rotating component is hinged on the other fixed shaft of the fixed component, and the outer end of the second rotating component is arranged on the first rotating component in a sliding mode. The herringbone ladder can be transported to a working site easily by only one person, so that the working efficiency is improved, the workload is reduced, the advantages are more obvious in multiple working sites, the carrying efficiency is greatly improved, and the labor force and time for multiple people to go back and forth are not required to be consumed.
Description
Technical Field
The invention relates to the field of power grid equipment maintenance, in particular to a herringbone ladder convenient to carry.
Background
At present daily electric wire netting equipment maintenance work arrangement safety measure in-process, often need use the double ladder, the double ladder has following problem in use and handling:
firstly, the height of the existing herringbone ladder is generally 1.5 meters and 3.0 meters, the herringbone ladder with the height of 1.5/3.0 meters has larger weight (40kg/40kg), two persons are required to carry the herringbone ladder, and the situation of tripping over of the persons is easy to happen in the carrying process. In addition, the simultaneous transportation of the double ladder by two persons also makes it difficult for the operator to carry other tools, and therefore the operator needs to go back and forth between the main control room and the facility area many times, which is time and labor consuming.
When the mobile terminal meets a plurality of working places, more time and manpower are needed to be consumed for carrying the mobile terminal back and forth, the labor intensity of workers is increased, fatigue is caused, and hidden dangers are caused to the safety of field work.
Based on the above circumstances, aiming at improving the working efficiency and reducing the safety risk, it is urgently needed to apply the double ladder fixing device which can solve the above disadvantages to the field.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the problems occurring in the prior art.
Therefore, one of the objects of the present invention is to provide a ladder for easy carrying, which can improve working efficiency and reduce safety risk.
In order to solve the technical problems, the invention provides the following technical scheme: a portable herringbone ladder, comprising: the side surface of the herringbone ladder main body is provided with a fixing component; the fixing assembly comprises a pair of fixing shafts extending outwards along the side direction of the herringbone ladder main body, and the two fixing shafts are arranged along the length direction of the herringbone ladder main body; the carrying device comprises a first rotating assembly and a second rotating assembly; the inner end of the first rotating component is hinged on one of the fixed shafts of the fixed component; the inner end of the second rotating component is hinged on the other fixed shaft of the fixed component, and the outer end of the second rotating component is arranged on the first rotating component in a sliding mode.
As a preferable aspect of the trestle ladder convenient to carry of the present invention, wherein: the fixing shaft is divided into a first fixing shaft and a second fixing shaft which extend outwards along the side direction of the herringbone ladder main body, and the first fixing shaft is closer to the leg part of the herringbone ladder main body relative to the second fixing shaft; the inner end of the first rotating assembly is hinged to the first fixed shaft, and the inner end of the second rotating assembly is hinged to the second fixed shaft.
As a preferable aspect of the trestle ladder convenient to carry of the present invention, wherein: the fixing assembly comprises a fixing plate detachably fixed on the side face of the herringbone ladder main body, and two fixing shafts are vertically fixed on the outer side face of the fixing plate.
As a preferable aspect of the trestle ladder convenient to carry of the present invention, wherein: the first rotating assembly comprises a first supporting rod and a roller, one end of the first supporting rod is hinged to one of the fixed shafts, the roller is arranged at the other end of the first supporting rod, and a first sliding groove extending along the length direction of the first supporting rod is formed in the first supporting rod; the second rotating assembly comprises a second supporting rod and a connecting module, one end of the second supporting rod is hinged to the other fixed shaft, the connecting module is arranged at the other end of the second supporting rod, and the connecting module is embedded into the first sliding groove and can slide relatively.
As a preferable aspect of the trestle ladder convenient to carry of the present invention, wherein: the connecting module comprises a sliding buckle penetrating through the second supporting rod and the first sliding groove and a tightening buckle detachably connected with the sliding buckle; the sliding buckle and the tightening buckle can clamp the first supporting rod and the second supporting rod between the sliding buckle and the tightening buckle through connection of the sliding buckle and the tightening buckle.
As a preferable aspect of the trestle ladder convenient to carry of the present invention, wherein: the sliding buckle comprises a connecting pipe with an opening at one end and a limiting disc fixed on the other end of the connecting pipe; the inner side wall of the connecting pipe is provided with internal threads; the tightening buckle comprises a screw section in threaded connection with the connecting pipe and a knob fixed on the other end of the screw section; the connecting pipe passes through the second supporting rod and the first sliding groove, and the limiting disc and the knob can clamp the first supporting rod and the second supporting rod between the first supporting rod and the second supporting rod together; the length of the connecting pipe is not more than the sum of the thicknesses of the first supporting rod and the second supporting rod.
As a preferable aspect of the trestle ladder convenient to carry of the present invention, wherein: the fixing plate is fixed on the side surface of the herringbone ladder main body through bolts; the inner end heads of the first supporting rod and the second supporting rod are provided with insulating columns extending inwards, the inner end faces of the insulating columns are attached to the outer side face of the fixing plate, and the length of the insulating columns is not less than the thickness of the limiting plate and the thickness of the bolt head of the bolt.
As a preferable aspect of the trestle ladder convenient to carry of the present invention, wherein: the second support rod is provided with a second sliding groove extending along the length direction of the second support rod, and the sliding buckle penetrates through the first sliding groove and the second sliding groove; the sliding buckle and the tightening buckle are connected to form a sliding group together, and the sliding group can move relatively in the first sliding groove and/or the second sliding groove; the connecting module also comprises a locking ring which is sleeved on the periphery of the connecting pipe and is clamped between the first supporting rod and the second supporting rod; the locking ring comprises half rings, a non-return section and an increasing section, wherein the non-return section is positioned at one end of the half rings, and the increasing section is positioned at the other end of the half rings; the surface of the inner layer of the non-return section is tangent to the inner ring of the semi-ring, and the surface of the outer layer of the non-return section is tangent to the outer ring of the semi-ring; the thickness of the non-return section is half of that of the semi-ring, and the outer side surface of the non-return section is flush with a side surface, corresponding to the first support rod, of the semi-ring; the surface of the inner layer of the lengthening section is parallel to the surface of the inner layer of the non-return section, and the surface of the outer layer of the lengthening section is mutually connected with the outer ring of the semi-ring to jointly form a smooth major arc curved surface; a side surface of the first support rod corresponding to the second support rod is provided with a sliding allowable groove consistent with the path of the first sliding groove and a notch which is positioned on one side of the sliding allowable groove and corresponds to the tail end of the non-return section; the outline of the outer end part of the first sliding groove is a semicircle matched with the outer diameter of the connecting pipe, the width of the sliding allowing groove is matched with the outer diameter of the major arc curved surface, and the outline of the outer end part of the sliding allowing groove is a semicircle matched with the outer diameter of the major arc curved surface; a side surface of the second support rod corresponding to the first support rod is provided with a rotation allowable groove positioned at the outer end part of the second sliding groove, the outline of the outer end part of the second sliding groove is a semicircle matched with the outer diameter of the connecting pipe, and the outline of the outer end part of the rotation allowable groove is a semicircle matched with the outer diameter of the major arc curved surface; the part of the locking ring corresponding to the thickness of the check section is a first layer, the rest part of the locking ring is a second layer, the first layer and the second layer are integrally formed, the first layer is embedded into the sliding allowance groove, and the second layer is embedded into the rotating allowance groove.
As a preferable aspect of the trestle ladder convenient to carry of the present invention, wherein: and a friction ferrule is arranged on the outer side wall of the connecting pipe at a section corresponding to the locking ring and the second chute, and the outer side wall of the friction ferrule is in extrusion contact with the inner ring of the locking ring and the inner side wall of the outer end part of the second chute.
As a preferable aspect of the trestle ladder convenient to carry of the present invention, wherein: the inner side of the tail end of the non-return section is provided with an arc surface, and the notch comprises a first curved surface matched with the rotation path at the tail end of the non-return section and a second curved surface corresponding to the arc surface at the tail end of the non-return section.
The invention has the beneficial effects that:
1. according to the invention, a pair of low-cost rotating assemblies is added on the existing herringbone ladder, so that the convenient and fast carrying process can be realized;
2. the herringbone ladder can be transported to a working site easily by only one person, so that the working efficiency is improved, the workload is reduced (at least half of the workload can be reduced when the ladder is transported every time), and the power failure time is reduced; the advantages are more obvious when multiple working places are used, the carrying efficiency is greatly improved, and the labor force and time for multiple people to go and return are not required to be consumed;
3. the invention avoids the risk caused by the possibility of tripping when the original overweight herringbone ladder is transported.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a dynamic diagram of a process of storing a handling apparatus.
Fig. 2 is an overall configuration diagram of the herringbone ladder when the conveying device is unfolded.
Fig. 3 is an overall configuration diagram of the herringbone ladder when the conveying device is stored.
Fig. 4 is an overall configuration view of the herringbone ladder for easy transportation when it is spread.
Fig. 5 is a detailed view of the structure at a in fig. 4.
Fig. 6 is an overall structure view of the closed herringbone ladder for easy carrying.
Fig. 7 is an exploded view of the carrying device.
Fig. 8 is a dynamic view of the rotational change of the locking ring inside the first support bar and its partial detail.
Fig. 9 is an assembly view of the locking ring and the second support bar and a partial detail view thereof.
Fig. 10 is a dynamic schematic view of the rotational change of the locking ring inside the second support bar and its partial detail.
Figure 11 is a three-dimensional view of the locking ring.
Fig. 12(a) to 12(e) are structural change diagrams of the transport device in the storage process.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1 to 3, a first embodiment of the present invention provides a conveniently transportable catwalk, which includes a catwalk body 100 and a transporting device detachably attached to a side surface of the catwalk body 100 by a fixing assembly 200, and which is deployable or stowable.
The man body 100 of the present invention may be any one of man ladders available in the art, and any one of the man ladders may be used as an attachment object of the present invention as long as the side surface of the man ladder can be mounted with the carrying device of the present invention.
The fixing assembly 200 is used for mounting the carrying device on the side surface of the herringbone ladder main body 100, and comprises a pair of fixing shafts 201 which are outwards extended along the side of the herringbone ladder main body 100, and the two fixing shafts 201 are arranged along the length direction of the herringbone ladder main body 100.
The handling apparatus comprises a first rotating assembly 300 and a second rotating assembly 400; the inner end of the first rotating component 300 is hinged on one of the fixed shafts 201 of the fixed component 200, and the outer end can be rotatably connected with a roller for consignment; the inner end of the second rotating assembly 400 is hinged on the other fixed shaft 201 of the fixed assembly 200, and the outer end is slidably arranged on the first rotating assembly 300.
Specifically, the first rotating assembly 300 includes a first support rod 301 having one end hinged to one of the fixed shafts 201, and a roller 302 rotatably disposed on the other end of the first support rod 301. The first support rod 301 is provided with a first slide groove 301a extending in the longitudinal direction thereof.
The second rotating assembly 400 includes a second support rod 401 having one end hinged to the other fixed shaft 201 and a connection module 402 disposed at the other end of the second support rod 401, the connection module 402 being inserted into the first sliding groove 301a and being capable of sliding relatively.
As shown in fig. 2, the carrying device of the present invention may be provided with a pair of ladder bodies 100 symmetrically on both sides thereof, and preferably, may be provided on both sides of the ladder body 100 biased toward one end of the leg portion. Further, the carrying device has two ways of "forward mounting" and "reverse mounting" on the side of the catwalk body 100, as follows:
the invention sets the following steps: the two fixing shafts 201 included in the fixing assembly 200 are respectively a first fixing shaft 201a and a second fixing shaft 201b extending outwards along the side of the trestle main body 100, and the first fixing shaft 201a is closer to the leg of the trestle main body 100 than the second fixing shaft 201 b.
Then, the forward mounting manner of the conveying device is as follows: the inner end of the first rotating assembly 300 is hinged on the first fixed shaft 201a, and the inner end of the second rotating assembly 400 is hinged on the second fixed shaft 201 b; the reverse installation mode of the carrying device is as follows: the inner end of first rotating assembly 300 is hinged to second fixed shaft 201b, and the inner end of second rotating assembly 400 is hinged to first fixed shaft 201 a.
The use and storage process of the invention is described by taking the forward mounting mode of the carrying device as an example:
as shown in fig. 1, when the carrying device is in the unfolded state, when the first support bar 301 is pulled to the left, the connection module 402 embedded in the first sliding groove 301a has a tendency to slide downward in the first sliding groove 301a, but since the connection module 402 is already located at the bottommost portion of the first sliding groove 301a, when the first support bar 301 is pulled to the left, neither the first support bar 301 nor the second support bar 401 can rotate. It can be seen that when the top end of the herringbone ladder main body 100 is held by hand and pushed to the right, the first support rod 301 has a tendency of rotating to the left, the first support rod 301, the second support rod 401 and the herringbone ladder main body 100 can form a triangular stabilizing mechanism, and the herringbone ladder main body can be pushed to walk smoothly through the rollers 302 at the bottom, so that time and labor are saved.
As shown in fig. 1, when the first supporting rod 301 is moved rightward, the connecting module 402 embedded in the first sliding slot 301a tends to slide upward in the first sliding slot 301a, so that the first supporting rod 301 can rotate counterclockwise, and the first supporting rod 301 can drive the second supporting rod 401 to rotate counterclockwise, thereby forming a storage state of the carrying device. It follows that when the carrying device of the present invention is not used, the first support bar 301 may be toggled to the right so that the first support bar 301 and the second support bar 401 are received at both sides of the trestle main body 100. It should be noted that: when the man-like ladder body 100 is not used, it can be vertically placed, and the first support bar 301 and the second support bar 401 naturally hang down due to their own weight, and the storage state is maintained, as shown in fig. 6.
If the carrying device is installed in a reverse direction, the operation process is reversed (when carrying the double ladder, the top end of the double ladder main body 100 needs to be grasped for pulling instead of pushing), and the description is omitted here.
Further, the fixing assembly 200 of the present invention may be a coupling structure detachably mounted on the side of the herringbone ladder main body 100 or two fixing shafts 201 integrally formed on the side of the herringbone ladder main body 100.
As shown in fig. 1, when the fixing assembly 200 is two fixing shafts 201 integrally formed on the side of the trestle main body 100, it is fixed by welding perpendicularly to the side of the trestle main body 100.
As shown in fig. 2 and 3, when the fixing assembly 200 adopts a detachable coupling structure, it includes a fixing plate 202 detachably fixed on a lateral surface of the trestle body 100 and two fixing shafts 201 perpendicularly fixed on an outer lateral surface of the fixing plate 202. The fixing plate 202 is integrally formed with the two fixing shafts 201, and the fixing plate 202 may be fixed to the side of the herringbone ladder main body 100 by bolts 203.
Further, as shown in fig. 7, the connecting module 402 includes a sliding buckle 402a passing through the second support rod 401 and the first sliding groove 301a, and a tightening buckle 402b detachably connected to the sliding buckle 402 a.
The slide fastener 402a and the tightening fastener 402b can sandwich the first support bar 301 and the second support bar 401 therebetween by connecting them. Therefore, when the first support rod 301 and the second support rod 401 are in the expanded state or the stored state, the first support rod 301 and the second support rod 401 can be clamped between the tightening slide fastener 402a and the tightening fastener 402b, so that the transportation device can maintain the stability of the expanded state or the stored state.
Further, the slide fastener 402a includes a connection tube 402a-1 having an opening at one end and a stopper plate 402a-2 fixed to the other end of the connection tube 402 a-1. The inner sidewall of the connection pipe 402a-1 is provided with an internal thread. It should be noted that: the inner ends of the first supporting rod 301 and the second supporting rod 401 are provided with insulating columns G extending inwards, the inner end surfaces of the insulating columns G are attached to the outer side surface of the fixing plate 202, so that the first supporting rod 301 and the second supporting rod 401 form a certain interval with the outer side surface of the double ladder main body 100, the first supporting rod 301 and the second supporting rod 401 cannot be limited by the stroke of a bolt head when rotating, the limiting disc 402a-2 cannot be abutted against the outer side surface stroke of the double ladder main body 100, and the rotation of the first supporting rod 301 and the second supporting rod 401 is prevented. The invention therefore sets for: the length of the isolation column G is not less than the thickness of the limiting disc 402a-2 and the thickness of the bolt head of the bolt 203.
The tightening buckle 402b includes a screw section 402b-1 that is threadedly engaged with internal threads in the connecting tube 402a-1 and a knob 402b-2 fixed to the other end of the screw section 402 b-1.
The connecting pipe 402a-1 sequentially passes through the first chute 301a and the second supporting rod 401, and is connected, tensioned and fixed through a screw section 402b-1 inserted at the other end; finally, the limiting plate 402a-2 and the knob 402b-2 can together clamp the first support rod 301 and the second support rod 401 therebetween.
Preferably, the length of the connecting tube 402a-1 is not greater than the sum of the thicknesses of the first supporting rod 301 and the second supporting rod 401, so as to ensure that the limiting disc 402a-2 and the knob 402b-2 have a sufficient squeezing and clamping space.
Further, a second sliding groove 401a extending along the length direction of the second support rod 401 is disposed on the second support rod 401, the width of the second sliding groove 401a is equal to that of the first sliding groove 301a, and a connecting pipe 402a-1 of the sliding buckle 402a sequentially passes through the first sliding groove 301a and the second sliding groove 401 a.
The invention sets the following steps: as shown in fig. 5 and 12(e), the sliding buckle 402a and the tightening buckle 402b form a sliding group Z together after being connected, and the sliding group Z can move relatively in the first sliding chute 301a and/or the second sliding chute 401 a. Therefore, when the first support rod 301 and the second support rod 401 are rotated to the storage state, the first sliding slot 301a and the second sliding slot 401a are opposite to each other and partially overlap each other, and the sliding group Z formed by the sliding buckle 402a and the tightening buckle 402b can slide on the section where the first sliding slot 301a and the second sliding slot 401a overlap each other.
Example 2
Referring to fig. 4 to 12, embodiment 2 of the present invention is different from embodiment 1 in that: the connection module 402 of the present invention further includes a locking ring 402c which is fitted around the periphery of the connection pipe 402a-1 and forms a contact friction on a contact surface with each other.
The locking ring 402c includes a half ring 402c-1, a backstop segment 402c-2 at one end of the half ring 402c-1, and an extension segment 402c-3 at the other end of the half ring 402 c-1. The half ring 402c-1 is a half ring structure with an opening and a central angle of pi; the non-return segment 402c-2 and the growth segment 402c-3 are respectively an extension structure integrally formed at two ends of the half-ring 402 c-1.
The non-return section 402c-2 is of a straight rod structure, the surface of the inner layer of the non-return section is tangent to the inner ring of the half ring 402c-1, and the surface of the outer layer of the non-return section is tangent to the outer ring of the half ring 402 c-1; the non-return section 402c-2 has a thickness half that of the half ring 402c-1, and an outer side surface thereof is flush with a side surface of the half ring 402c-1 corresponding to the first support bar 301. The invention sets the following steps: in the axial direction of the lock ring 402C, the portion of the lock ring 402C corresponding to the thickness of the check section 402C-2 is a first layer C-1, the remaining portion is a second layer C-2, and the first layer C-1 is integrally formed with the second layer C-2.
The increasing section 402c-3 is of an outward convex angle structure, the surface of the inner layer of the increasing section 402c-3 is tangent to the inner ring of the half ring 402c-1 and is parallel to the surface of the inner layer of the non-return section 402 c-2; the outer layer surface of the lengthened section 402c-3 is mutually connected with the outer ring of the half ring 402c-1 to form a smooth major arc curved surface Q together, namely the central angle of the major arc curved surface Q is larger than pi, and the preferable interval is as follows:
a side surface of the first support rod 301 corresponding to the second support rod 401 is provided with a sliding allowing groove 301b corresponding to the path of the first sliding groove 301a and a notch 301c located at one side of the sliding allowing groove 301b and corresponding to the end of the non-return segment 402 c-2. The outer end profile of the first sliding groove 301a is a semicircle matched with the outer diameter of the connecting pipe 402a-1, the width of the sliding allowing groove 301b is matched with the outer diameter of the major arc curved surface Q, and the outer end profile of the sliding allowing groove 301b is a semicircle matched with the outer diameter of the major arc curved surface Q; therefore, the width of the slide allowing groove 301b is larger than the width of the first slide groove 301 a.
The inner side of the end of the non-return segment 402c-2 is provided with a circular arc surface (round corner), so that the notch 301c corresponding to the notch comprises a first curved surface 301c-1 matched with the rotating path of the end of the non-return segment 402c-2 and a second curved surface 301c-2 corresponding to the circular arc surface of the end of the non-return segment 402 c-2.
A side surface of the second support rod 401 corresponding to the first support rod 301 is provided with a rotation allowable groove 401b positioned at the outer end of the second sliding groove 401a, the outline of the outer end of the second sliding groove 401a is a semicircle matched with the outer diameter of the connecting pipe 402a-1, and the outline of the end of the rotation allowable groove 401b is a semicircle matched with the outer diameter of the major arc curved surface Q; therefore, the rotation allowing groove 401b is a circular groove having an outer diameter larger than the width of the second chute 401 a.
The lock ring 402C of the present invention is sandwiched between the first support bar 301 and the second support bar 401, with its first layer C-1 inserted in the slide allowing groove 301b and capable of relative sliding therein, and with its second layer C-2 inserted in the rotation allowing groove 401b and capable of relative rotation therein.
Preferably, the thicknesses of the first support rod 301, the second support rod 401 and the locking ring 402c are equal and are D; the thickness of the first layer C-1 and the second layer C-2 is D/2; the depth of the slide allowance groove 301b and the rotation allowance groove 401b are both D/2. The connecting pipe 402a-1 passes through the first chute 301a, the locking ring 402c, and the second chute 401a in this order, and has a length less than or equal to D.
Preferably, a friction collar 402a-3 is disposed on an outer side wall of the connecting tube 402a-1 at a section corresponding to the locking ring 402c and the second sliding chute 401a (i.e., except for a section corresponding to the first sliding chute 301a), the friction collar 402a-3 is a sleeve-shaped rubber gasket sleeved on the outer periphery of the connecting tube 402a-1, and an outer side wall of the friction collar 402a-3 is in pressing contact with an inner ring of the locking ring 402c and an inner side wall of an outer end portion of the second sliding chute 401a to form contact friction, so that if the rotation limiting disc 402a-2 rotates the locking ring 402c together in the rotation allowing groove 401b by friction.
The invention sets the following steps: when the sliding group Z is simultaneously located at the outer ends of the first and second sliding chutes 301a and 401a, the first support bar 301 is perpendicular to the trestle main body 100.
Based on the above, the conveniently-carried herringbone ladder of the method has the following use process:
once, as shown in fig. 12(a), the carrying device is in a deployed state, in which the first support bar 301 is perpendicular to the herringbone ladder main body 100, the sliding group Z is located at the outer end of the first sliding chute 301a and the second sliding chute 401a, the locking ring 402c rotates in the rotation allowing groove 401b until the end of the non-return segment 402c-2 is embedded in the notch 301c at the side of the sliding allowing groove 301b, and under the clamping of the limiting disc 402a-2 and the knob 402b-2, the locking ring 402c can be clamped between the first support bar 301 and the second support bar 401, and due to the contact of the friction collar 402a-3, the locking ring 402c can be kept in a stable state.
As shown in fig. 12(a), in the initial state, since the non-return segment 402c-2 can form a block of the path on the second runner 401a, it is analyzed from the second support bar 401: the sliding group Z cannot slide in the second sliding groove 401a because it is obstructed by the non-return segment 402 c-2; analysis from the first support bar 301: the end of the non-return segment 402c-2 is caught in the notch 301c and cannot slide upward in the first slide groove 301 a. As can be seen from this, in this initial state, the locking ring 402c can simultaneously restrain the sliding group Z at the bottommost portions of the first sliding chute 301a and the second sliding chute 401a, so that the sliding group Z cannot slide in any direction, and the first support rod 301 cannot rotate in any direction, which facilitates the stability when the herringbone ladder is pushed.
Secondly, as shown in fig. 12(b), if the sliding block Z needs to be stored, the limiting disc 402a-2 can be rotated reversely, so that the sliding buckle 402a and the tightening buckle 402b are unscrewed and lose the clamping effect, and meanwhile, the limiting disc 402a-2 which rotates reversely can drive the locking ring 402c to rotate reversely together through the connecting pipe 402a-1 and the friction collar 402a-3 on the periphery thereof until the locking ring 402c rotates to "the opening direction of the locking ring 402c is consistent with the length direction of the second sliding chute 401 a", and at this time, the locking ring 402c will not play any restriction limiting role on the sliding block Z. Subsequently, as shown in fig. 12(c), when the first support rod 301 is pushed to the right, the sliding group Z and the locking ring 402c have a tendency to slide upward in the first sliding groove 301a, and the sliding group Z has a tendency to slide downward in the second sliding groove 401a (but the sliding group Z is located at the bottommost portion of the second sliding groove 401a, and therefore cannot slide), so that the first support rod 301 can rotate counterclockwise, and the first support rod 301 can also drive the second support rod 401 to rotate counterclockwise, and finally, the storage state of the carrying device is formed, as shown in fig. 12 (d).
If the double ladder needs to be frequently used for a short time, the double ladder can be temporarily stored through the process two. However, if the trestle ladder is not used in a short period, in order to ensure the stable storage of the carrying device, a step can be added after the process two, and the following steps are included:
thirdly, as shown in fig. 12(e), the sliding group Z is pushed to the left, the locking ring 402c is shifted, the ends of the non-return section 402c-2 and the long section 402c-3 are both towards one side of the sliding allowing groove 301b, and then the knob 402b-2 at the outer end is tightened to achieve the structural stability. If the slide group Z is used again later, the lock ring 402c may be pulled up, and the slide group Z may be pushed to the right to be re-embedded into the ring of the lock ring 402c, which is not described in detail in the following process.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a double ladder convenient to transport which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a herringbone ladder main body (100), wherein a fixing component (200) is arranged on the side surface of the herringbone ladder main body;
the fixing assembly (200) comprises a pair of fixing shafts (201) extending outwards along the side direction of the herringbone ladder main body (100), and the two fixing shafts (201) are arranged along the length direction of the herringbone ladder main body (100); and the number of the first and second groups,
a handling device comprising a first rotating assembly (300) and a second rotating assembly (400); the inner end of the first rotating component (300) is hinged on one of the fixed shafts (201) of the fixed component (200); the inner end of the second rotating component (400) is hinged on the other fixed shaft (201) of the fixed component (200), and the outer end is arranged on the first rotating component (300) in a sliding way.
2. The easy-to-carry herringbone ladder of claim 1, wherein: the fixing shaft (201) is divided into a first fixing shaft (201a) and a second fixing shaft (201b) which extend outwards along the side direction of the herringbone ladder main body (100), and the first fixing shaft (201a) is closer to the leg part of the herringbone ladder main body (100) relative to the second fixing shaft (201 b);
the inner end of the first rotating component (300) is hinged on the first fixed shaft (201a), and the inner end of the second rotating component (400) is hinged on the second fixed shaft (201 b).
3. The easy-to-carry herringbone ladder of claim 2, wherein: the fixing assembly (200) comprises a fixing plate (202) detachably fixed on the side surface of the herringbone ladder main body (100), and two fixing shafts (201) are vertically fixed on the outer side surface of the fixing plate (202).
4. The ladder of any one of claims 1 to 3, further comprising: the first rotating assembly (300) comprises a first supporting rod (301) and a roller (302), wherein one end of the first supporting rod (301) is hinged to one of the fixed shafts (201), the roller (302) is arranged at the other end of the first supporting rod (301), and a first sliding groove (301a) extending along the length direction of the first supporting rod (301) is formed in the first supporting rod (301);
the second rotating assembly (400) comprises a second supporting rod (401) with one end hinged on the other fixed shaft (201) and a connecting module (402) arranged on the other end of the second supporting rod (401), wherein the connecting module (402) is embedded in the first sliding groove (301a) and can slide relatively.
5. The easy-to-handle catwalk of claim 4, wherein: the connecting module (402) comprises a sliding buckle (402a) penetrating through the second supporting rod (401) and the first sliding groove (301a) and a tightening buckle (402b) detachably connected with the sliding buckle (402 a);
the sliding buckle (402a) and the tightening buckle (402b) can clamp the first support rod (301) and the second support rod (401) between the sliding buckle and the tightening buckle through connection of the sliding buckle and the tightening buckle.
6. The easy-to-handle catwalk of claim 5, wherein: the sliding buckle (402a) comprises a connecting pipe (402a-1) with an opening at one end and a limiting disc (402a-2) fixed on the other end of the connecting pipe (402 a-1); the inner side wall of the connecting pipe (402a-1) is provided with internal threads;
the tightening buckle (402b) comprises a screw section (402b-1) in threaded connection with the connecting pipe (402a-1) and a knob (402b-2) fixed on the other end of the screw section (402 b-1);
the connecting pipe (402a-1) passes through the second supporting rod (401) and the first sliding groove (301a), and the first supporting rod (301) and the second supporting rod (401) can be clamped between the limiting disc (402a-2) and the knob (402b-2) together; the length of the connecting pipe (402a-1) is not more than the sum of the thicknesses of the first supporting rod (301) and the second supporting rod (401).
7. The easy-to-handle catwalk of claim 6, wherein: the fixing plate (202) is fixed on the side surface of the herringbone ladder main body (100) through a bolt (203);
the inner ends of the first supporting rod (301) and the second supporting rod (401) are provided with isolation columns (G) extending inwards, the inner end faces of the isolation columns (G) are attached to the outer side face of the fixing plate (202), and the lengths of the isolation columns (G) are not smaller than the thickness of the limiting plate (402a-2) and the thickness of the bolt head of the bolt (203).
8. The easy-to-carry herringbone ladder of claim 6 or 7, wherein: a second sliding groove (401a) extending along the length direction of the second supporting rod (401) is formed in the second supporting rod (401), and the sliding buckle (402a) penetrates through the first sliding groove (301a) and the second sliding groove (401 a);
the sliding buckle (402a) and the tightening buckle (402b) are connected to form a sliding group (Z) together, and the sliding group (Z) can move relatively in the first sliding chute (301a) and/or the second sliding chute (401 a);
the connecting module (402) further comprises a locking ring (402c) which is sleeved on the periphery of the connecting pipe (402a-1) and clamped between the first supporting rod (301) and the second supporting rod (401);
the locking ring (402c) comprises a half ring (402c-1), a non-return section (402c-2) at one end of the half ring (402c-1), and an increasing section (402c-3) at the other end of the half ring (402 c-1);
the surface of the inner layer of the non-return section (402c-2) is tangent to the inner ring of the half ring (402c-1), and the surface of the outer layer of the non-return section (402c-2) is tangent to the outer ring of the half ring (402 c-1); the thickness of the non-return section (402c-2) is half of that of the half ring (402c-1), and the outer side surface of the non-return section is flush with one side surface of the half ring (402c-1) corresponding to the first supporting rod (301);
the surface of the inner layer of the lengthened section (402c-3) is parallel to the surface of the inner layer of the non-return section (402c-2), and the surface of the outer layer of the lengthened section (402c-3) is mutually connected with the outer ring of the half ring (402c-1) to jointly form a smooth major arc curved surface (Q);
a sliding allowing groove (301b) which is consistent with the path of the first sliding groove (301a) and a notch (301c) which is positioned on one side of the sliding allowing groove (301b) and corresponds to the tail end of the non-return section (402c-2) are formed in one side surface, corresponding to the second supporting rod (401), of the first supporting rod; the outline of the outer end part of the first sliding chute (301a) is a semicircle matched with the outer diameter of the connecting pipe (402a-1), the width of the sliding allowing groove (301b) is matched with the outer diameter of the major arc curved surface (Q), and the outline of the outer end part of the sliding allowing groove (301b) is a semicircle matched with the outer diameter of the major arc curved surface (Q);
a side surface of the second support rod (401) corresponding to the first support rod (301) is provided with a rotation allowing groove (401b) positioned at the outer end part of the second sliding groove (401a), the outline of the outer end part of the second sliding groove (401a) is a semicircle matched with the outer diameter of the connecting pipe (402a-1), and the outline of the outer end part of the rotation allowing groove (401b) is a semicircle matched with the outer diameter of the major arc curved surface (Q);
the locking ring (402C) is provided with a first layer (C-1) corresponding to the thickness of the check section (402C-2) and a second layer (C-2) corresponding to the rest, the first layer (C-1) and the second layer (C-2) are integrally formed, the first layer (C-1) is embedded in the sliding allowance groove (301b), and the second layer (C-2) is embedded in the rotation allowance groove (401 b).
9. The easy-to-carry herringbone ladder of claim 8, wherein: and a friction ferrule (402a-3) is arranged on the outer side wall of the connecting pipe (402a-1) at the section corresponding to the locking ring (402c) and the second sliding chute (401a), and the outer side wall of the friction ferrule (402a-3) is in pressing contact with the inner ring of the locking ring (402c) and the inner side wall of the outer end part of the second sliding chute (401 a).
10. The easy-to-carry herringbone ladder of claim 9, wherein: the inner side of the tail end of the non-return segment (402c-2) is provided with an arc surface, and the notch (301c) comprises a first curved surface (301c-1) matched with the rotation path of the tail end of the non-return segment (402c-2) and a second curved surface (301c-2) corresponding to the arc surface of the tail end of the non-return segment (402 c-2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010845503.4A CN111997514B (en) | 2020-08-20 | 2020-08-20 | Double ladder convenient to transport |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010845503.4A CN111997514B (en) | 2020-08-20 | 2020-08-20 | Double ladder convenient to transport |
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| CN111997514A true CN111997514A (en) | 2020-11-27 |
| CN111997514B CN111997514B (en) | 2022-08-05 |
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| US9464449B1 (en) * | 2015-10-14 | 2016-10-11 | Frank August Barcatta | Electric ladder |
| CN205713918U (en) * | 2016-06-24 | 2016-11-23 | 国家电网公司 | A kind of Novel herringbone ladder |
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|---|---|
| CN111997514B (en) | 2022-08-05 |
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