CN211144335U - Ladder - Google Patents
Ladder Download PDFInfo
- Publication number
- CN211144335U CN211144335U CN201920561805.1U CN201920561805U CN211144335U CN 211144335 U CN211144335 U CN 211144335U CN 201920561805 U CN201920561805 U CN 201920561805U CN 211144335 U CN211144335 U CN 211144335U
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- China
- Prior art keywords
- ladder
- ladder leg
- leg
- adjusting rod
- ground
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a ladder, which comprises a first ladder leg with a plurality of cross beams; the tensioning part is arranged between the first ladder leg and the second ladder leg and used for limiting the change of the included angle between the first ladder leg and the second ladder leg after the height of the first ladder leg is adjusted. The tensioning portion of this ladder can pin down first ladder leg and second ladder leg respectively to the contained angle of fixed first ladder leg and second ladder leg, thereby the use height of fixed ladder, consequently, this ladder can enough adjust the use height, satisfies the demand of not using the occasion, can form this stable bearing structure of chevron shape again with ground, safe and reliable, but the probability that greatly reduced ladder toppled.
Description
Technical Field
The utility model relates to an aerial working field especially relates to a ladder.
Background
A ladder is a common tool used for high-altitude operations. When the ladder is applied to the ground with poor flatness or soft ground soil layer, the danger of toppling can occur at any time in the operation process, the safety of personnel and equipment is influenced, and although the ground can be tamped by manpower in advance, the ladder feet can still generate large pressure to the ground to damage the ground soil layer; the ladder can be held by other workers to avoid overturning of the ladder and workers standing above the ladder, but the mode wastes labor force and has the possibility of causing associated injury.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a ladder, its stability is good, the security is high, can reduce the probability that the ladder toppled, and then improves work efficiency.
In order to achieve the above object, the present invention provides a ladder comprising a first ladder leg having a plurality of cross members; the tensioning part is arranged between the first ladder leg and the second ladder leg and used for limiting the change of the included angle between the first ladder leg and the second ladder leg after the height of the first ladder leg is adjusted.
Preferably, the ladder further comprises a hanging part, one end of the hanging part is fixed on the first ladder leg or the second ladder leg, and the other end of the hanging part is used for being hooked on a fixed field, so that the first ladder leg and the second ladder leg are prevented from falling.
Preferably, the suspension part is a safety rope; the upper ends of the first ladder leg and the second ladder leg are provided with safety hooks for the safety ropes to connect.
Preferably, the bottoms of the first ladder leg and the second ladder leg are both provided with ladder leg bases for being attached to the ground.
Preferably, any of the ladder leg bases comprises:
a base plate for attaching to the ground;
one end of the adjusting rod is hinged to the upper end face of the backing plate, and the other end of the adjusting rod is sleeved with the first ladder leg or the second ladder leg to achieve length adjustment;
and the stop part is coaxially arranged with the adjusting rod and used for fixing the relative position of the adjusting rod and the first ladder leg or the relative position of the adjusting rod and the second ladder leg.
Preferably, a universal hinged joint is further arranged between the base plate and the adjusting rod.
Preferably, threaded holes are formed in the bottoms of the first ladder leg and the second ladder leg; the adjusting rod is provided with an external thread which is meshed in the threaded hole to realize length adjustment.
Preferably, the stopping part is a stopping bolt sleeved on the adjusting rod.
Preferably, the lower end face of the backing plate is provided with anti-skid lines.
Preferably, the tensioning part is embodied as a tensioning lever.
Compared with the prior art, the ladder provided by the utility model comprises a first ladder leg with a plurality of cross beams; the second ladder leg is hinged to the first ladder leg, the second ladder leg and the tensioning portion are used for forming a herringbone ladder with the first ladder leg, and the tensioning portion is arranged between the first ladder leg and the second ladder leg.
The height of the herringbone ladder can be changed by adjusting the included angle between the first ladder leg and the second ladder leg, and the tensioning part can restrict the relative positions of the first ladder leg and the second ladder leg with the adjusted included angle, so that the first ladder leg and the second ladder leg can be fixed. In summary, first ladder leg and second ladder leg can enough adjust the use height, satisfy the demand of the use occasion of co-altitude not, can form this stable bearing structure of chevron shape again with ground, and safe and reliable can greatly reduced ladder probability of toppling.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural view of a ladder according to an embodiment of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a schematic structural diagram of a backing plate according to an embodiment of the present invention;
wherein, 1-the first ladder leg, 2-the second ladder leg, 3-the safe hook, 4-the backing plate, 41-the antiskid line, 5-the regulation pole, 6-the stop bolt, 7-the tightening rod, 8-the regulation bayonet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 4, fig. 1 is a schematic structural view of a ladder according to an embodiment of the present invention; FIG. 2 is a front view of FIG. 1; FIG. 3 is an enlarged view of a portion of FIG. 2 at A; fig. 4 is a schematic structural diagram of a backing plate according to an embodiment of the present invention.
The utility model provides a ladder, which comprises a first ladder leg 1 and a second ladder leg 2, wherein the first ladder leg 1 is hinged with the second ladder leg 2 to form a herringbone ladder; a tensioning part is arranged between the first ladder leg 1 and the second ladder leg 2, and the first ladder leg 1 and the second ladder leg 2 can be pulled after the included angle between the first ladder leg 1 and the second ladder leg 2 is adjusted, so as to limit the included angle between the first ladder leg 1 and the second ladder leg 2, and further fix the height of the ladder; wherein, first ladder leg 1 has a plurality of crossbeams that are used for the climbing.
Compared with the common ladder, the ladder provided by the utility model has the advantages that the first ladder leg 1 and the second ladder leg 2 form a herringbone ladder, and a stable supporting structure can be formed with the ground; compared with the traditional herringbone ladder, the ladder provided by the utility model can realize height adjustment by combining the change of the included angle between the first ladder leg 1 and the second ladder leg 2 with the tensioning part; particularly, after the included angle between the first ladder leg 1 and the second ladder leg 2 is increased, the first ladder leg 1 and the second ladder leg 2 are respectively restrained by two ends of the tensioning part, so that the height of the ladder provided by the utility model can be reduced; first ladder leg 1 and second ladder leg 2's contained angle reduces the back and is drawn back first ladder leg 1 and second ladder leg 2 respectively by the both ends of taut portion, can increase the utility model provides a height of ladder.
Wherein, the mode that the both ends of taut portion pin down first ladder leg 1 and second ladder leg 2 can be divided into two kinds: when the included angle between the first ladder leg 1 and the second ladder leg 2 is changed, the tensioning part can be connected to different interfaces under the condition of unchanged length, so that the change of the included angle between the first ladder leg 1 and the second ladder leg 2 is restrained; the connecting position of the tensioning part and the first ladder leg 1 and the connecting position of the tensioning part and the second ladder leg 2 are not changed, the length of the tensioning part is adjustable, and the included angle between the first ladder leg 1 and the second ladder leg 2 can be limited in different ranges by changing the length of the tensioning part, so that the height of the ladder can be adjusted.
The ladder provided by the utility model has the stable structure of the herringbone ladder, and is safe and reliable; the height of the ladder can be adjusted so as to be suitable for working occasions with different heights.
The ladder provided by the present invention will be further described with reference to the accompanying drawings and embodiments.
The ladder further comprises a hanging part, one end of the hanging part is connected with the first ladder leg 1 or the second ladder leg 2, and the other end of the hanging part is used for being connected to a fixed place; that is to say, after the tensioning portion restricts the change of the included angle between the first ladder leg 1 and the second ladder leg 2 so as to fix the height of the double ladder formed by the first ladder leg 1 and the second ladder leg 2, the double ladder is connected with a fixing place applying the double ladder by the hanging portion, so that the double ladder can be pulled when the double ladder topples over, and the injury to workers caused by toppling over of the double ladder is reduced or even avoided.
For the convenience of connection, the suspension portion is usually made of flexible material, such as a rope structure of a steel wire rope, a safety rope, etc. One end of the rope is connected to a fixed place and can adopt binding, hooking and other modes; the other end of rope is connected with first ladder leg 1 or second ladder leg 2, and for the convenience, the upper end of first ladder leg 1 and second ladder leg 2 all sets up the safety hook 3 that is used for supplying the linkage to connect. Because first ladder leg 1 and second ladder leg 2 all are equipped with safe couple 3, can rationally select one of them ladder leg and the buckle locking that the portion tip set up of hanging according to the spatial position of fixed knot structure in the place during the use in order to realize being connected, shorten the length of the portion of hanging as far as possible and avoid the portion of hanging to twine with other structures.
Further, considering that the first ladder leg 1 and the second ladder leg 2 can sink into the soil layer when the ladder is applied to soft ground, although the herringbone structure and the hanging part formed by the first ladder leg 1 and the second ladder leg 2 can play roles of fixing and drawing, the horizontal heights of the first ladder leg 1 and the second ladder leg 2 are different after sinking into the soil layer, the stress of one ladder leg can be increased, the pulling force applied to the hanging part is increased, and potential safety hazards exist. To sum up, the bottom of the first ladder leg 1 and the bottom of the second ladder leg 2 of the ladder provided by the utility model are also provided with ladder leg bases for being attached to the ground, the contact area of any one ladder leg base and the ground is larger than the sectional area of the ladder leg, and the pressure of the first ladder leg 1 and the second ladder leg 2 to the ground can be reduced; and no matter what the included angle of the herringbone ladder and the flatness of the ground, the base of any ladder leg is always attached to the ground.
The ladder leg base can specifically comprise a backing plate 4, an adjusting rod 5 and a stopping part; specifically, the two adjusting rods 5 are sleeved with the bottoms of the two vertical rods of the first ladder leg 1 to realize the length adjustment of the first ladder leg 1, the two adjusting rods 5 are sleeved with the bottoms of the two vertical rods of the second ladder leg 2 to realize the length adjustment of the second ladder leg 2, and the stopping part is arranged between any vertical rod and the adjusting rod 5 to fix the length of any vertical rod and the adjusting rod 5; and the one end of arbitrary regulation pole 5 keeping away from the pole setting is provided with backing plate 4, and backing plate 4 and ground laminating are dispersed in backing plate 4 evenly with the pressure that the pole setting was transferred to regulation pole 5. In this embodiment, the adjusting rods 5 of the first ladder leg 1 and the second ladder leg 2 can be adjusted to adjust the smoothness of the first ladder leg 1 and the second ladder leg 2, and the length of any adjusting rod 5 of the first ladder leg 1 and/or any adjusting rod 5 of the second ladder leg 2 can be adjusted to adjust the fitting degree of any backing plate 4 at the tail end of the first ladder leg 1 and the ground and/or the fitting degree of any backing plate 4 at the tail end of the second ladder leg 2 and the ground.
The specific arrangement form and the installation position of the stopping part are arranged according to the sleeving relation between the adjusting rod 5 and the vertical rod, for example, when the adjusting rod 5 is sleeved in the vertical rod, the stopping part can be arranged on the adjusting rod 5 and is positioned at the lower end of the vertical rod, and the lowest position of the vertical rod relative to the adjusting rod 5 can be changed by changing the axial position of the stopping part relative to the adjusting rod 5.
Except that the bottom end of any vertical rod is sleeved with the adjusting rod 5 to adjust the length of any vertical rod independently, a universal hinged joint is further arranged between the backing plate 4 of the ladder leg base and the adjusting rod 5, so that the backing plate 4 can have three rotational degrees of freedom to be attached to the ground which is sunken or protruded towards different directions.
In consideration of the connection strength of the adjusting rod 5 and the first ladder leg 1 or the second ladder leg 2, the bottom parts of the first ladder leg 1 and the second ladder leg 2 are provided with threaded holes, the adjusting rod 5 is provided with external threads meshed in the threaded holes, and compared with the sleeve joint of a polished rod, the bearing capacity of the ladder can be guaranteed through threaded connection, and the locking part is prevented from being damaged due to large stress. On the basis of the above embodiment, the stopping part may be specifically a stop bolt 6 sleeved on the adjusting rod 5, and the position of the stop bolt 6 in the axial direction of the adjusting rod 5 limits the axial movement of the vertical rod relative to the adjusting rod 5, so as to fix the adjusting rod 5 and the vertical rod.
The part of the adjusting rod 5 exposed out of the upright rods is also provided with an adjusting bayonet 8, so that a worker can clamp a tool sleeve in the adjusting bayonet 8 when adjusting the relative position of any upright rod and the adjusting rod 5, and the adjusting rod 5 can be rotated conveniently.
In order to increase the friction between the ladder leg base and the ground, the lower end surface of any backing plate 4 is provided with anti-skid lines 41; the anti-slip pattern 41 may be a rivet-shaped protrusion or a uniformly distributed strip-shaped concave-convex pattern. The anti-slip pattern 41 may be arranged according to the soil quality of the ground, the above-listed structures are only examples of the anti-slip pattern 41, and the arrangement of the anti-slip pattern 41 is not limited to the above-mentioned specific arrangement forms.
In any of the above embodiments, the tensioning portion may be provided as a tensioning rod 7, such as a hydraulic tensioning rod; it may also be provided as a tensioner, such as a wire rope tensioner. The hydraulic tension rod or the steel wire rope tensioner belong to the prior art, and the specific setting mode and the adjusting mode of the hydraulic tension rod or the steel wire rope tensioner can refer to related settings in the prior art, which are not described in detail herein.
The ladder provided by the utility model is described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. A ladder, comprising:
a first ladder leg (1) having a plurality of cross-members;
a second ladder leg (2) hinged to the first ladder leg (1) and used for forming a herringbone ladder with the first ladder leg (1);
locate first ladder leg (1) with between second ladder leg (2), be used for after the altitude mixture control of first ladder leg (1) restricts first ladder leg (1) with the taut portion of the contained angle change of second ladder leg (2).
2. A ladder according to claim 1, characterized in that it further comprises a suspension part which is fastened to the first ladder leg (1) or the second ladder leg (2) at one end and which is fastened to a fastening place at the other end so as to avoid toppling of the first ladder leg (1) and the second ladder leg (2).
3. A ladder as claimed in claim 2, characterized in that the suspension is embodied as a safety rope; the upper ends of the first ladder leg (1) and the second ladder leg (2) are respectively provided with a safety hook (3) for the safety rope to connect.
4. A ladder as claimed in claim 2, characterized in that the bottom of the first ladder leg (1) and the second ladder leg (2) are each provided with a ladder leg foot for fitting to the ground.
5. A ladder as set forth in claim 4 wherein either of said leg bases includes:
a base plate (4) for attaching to the ground;
one end of the adjusting rod (5) is hinged to the upper end face of the backing plate (4), and the other end of the adjusting rod is sleeved with the first ladder leg (1) or the second ladder leg (2) to achieve length adjustment;
and the stopping part is coaxially arranged with the adjusting rod (5) and is used for fixing the relative positions of the adjusting rod (5) and the first ladder leg (1) or the adjusting rod (5) and the second ladder leg (2).
6. A ladder as claimed in claim 5, characterised in that a universal joint is also provided between the shim plate (4) and the adjusting bar (5).
7. A ladder as claimed in claim 6, characterized in that the bottom of the first ladder leg (1) and the second ladder leg (2) is provided with threaded holes; the adjusting rod (5) is provided with an external thread which is meshed in the threaded hole to realize length adjustment.
8. A ladder as claimed in claim 7, characterized in that the stop is embodied as a stop bolt (6) which is fitted over the adjusting bar (5).
9. A ladder as claimed in claim 8, characterised in that the lower end face of the shim plate (4) is provided with anti-slip threads (41).
10. A ladder as claimed in any one of claims 1 to 9, characterized in that the tightening part is embodied as a tightening rod (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920561805.1U CN211144335U (en) | 2019-04-23 | 2019-04-23 | Ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920561805.1U CN211144335U (en) | 2019-04-23 | 2019-04-23 | Ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211144335U true CN211144335U (en) | 2020-07-31 |
Family
ID=71742570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920561805.1U Expired - Fee Related CN211144335U (en) | 2019-04-23 | 2019-04-23 | Ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211144335U (en) |
-
2019
- 2019-04-23 CN CN201920561805.1U patent/CN211144335U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200731 |