CN206545479U - Folding ladder - Google Patents
Folding ladder Download PDFInfo
- Publication number
- CN206545479U CN206545479U CN201720102760.2U CN201720102760U CN206545479U CN 206545479 U CN206545479 U CN 206545479U CN 201720102760 U CN201720102760 U CN 201720102760U CN 206545479 U CN206545479 U CN 206545479U
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- ladder
- locking teeth
- support bar
- outer box
- connecting rod
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- 230000000694 effects Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
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- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model provides a kind of folding ladder, and the folding ladder includes：Ladder that two panels is hinged and the lateral support bar set respectively in the both sides of two panels ladder, the lateral support bar is respectively the first lateral support bar for being arranged on the side of two panels ladder first and the second lateral support bar for being arranged on the side of two panels ladder second；The first lateral support bar is expansion link, and the expansion link at least includes；The first pole and the second pole being connected with each other, first pole and the second pole being capable of relative telescopics；First pole and the second pole, which are respectively equipped with the different connecting hole of multiple height, the connecting hole, is provided with shop bolt or positioning screw, and first pole and the second pole shop bolt or positioning screw are located by connecting；First pole and the second pole are rectangular bar；Or the groove profile that the cross section of first pole and the second pole is rectangle.The utility model improves the security performance of lateral support bar.
Description
Technical field
The utility model is related to a kind of folding ladder.
Background technology
At present, folding ladder causes the tumble injury of personnel on ladder in use easily to sideways.Can although occurring in that
The folding ladder of lateral support, i.e., set lateral support bar respectively in the both sides of two panels ladder, still, situation about being born a heavy burden in ladder
Under, the easy lateral bending of lateral support bar even fractures, still with larger potential safety hazard.
In summary, there is problems with the prior art：Folding ladder with lateral support bar, lateral support bar is easy
Lateral bending even fractures, with the hidden danger that safety is larger.
Utility model content
The utility model provides a kind of folding ladder, to solve the easy lateral bending of lateral support bar or even fracture, with safety compared with
The problem of big hidden danger.
Therefore, the utility model proposes a kind of folding ladder, the folding ladder includes：Ladder that two panels is hinged and two
The lateral support bar that the both sides of piece ladder are set respectively, the ladder that two panels is hinged is respectively first ladder and second ladder,
The lateral support bar is respectively to be arranged on the first lateral support bar of the side of two panels ladder first and be arranged on two panels ladder
Second lateral support bar of two sides；
The first lateral support bar and/or the second lateral support bar are expansion link, and the expansion link at least includes；Mutually
The first pole and the second pole of connection, first pole and the second pole being capable of relative telescopics；First pole and
Two poles, which are respectively equipped with the different connecting hole of multiple height, the connecting hole, is provided with shop bolt or positioning screw, and described the
One pole and the second pole shop bolt or positioning screw are located by connecting；
First pole and the second pole are rectangular bar；Or the cross section of first pole and the second pole is
The groove profile of rectangle, the cross section at least includes：Three sides of rectangle.
Further, the cross section of first pole and the second pole is the groove profile of rectangle, and the cross section includes：
Successively the first of the rectangle of tandem array while, second while and the 3rd side, described first while and be opposite side when the 3rd, the cross section
Also include：Be connected to described first while head end the 4th while and when being connected to the 3rd in the 5th of tail end, the 4th side and
5th while on the straight line and when parallel described second, and the described 4th while and length sum when the 5th less than institute
State the second side, the described 4th at the 5th between form breach.
Further, the folding ladder also includes：
First connecting rod, is movably connected between first ladder and the first lateral support bar；
Second connecting rod, is movably connected between second ladder and the first lateral support bar；
The first locking device of the first connecting rod and second connecting rod is locked, the first connecting rod and second connecting rod is connected；
First locking device is arranged on the first lateral support bar.
Further, the first connecting rod has the second of two ends, the respectively first end of first connecting rod and first connecting rod
End, the first end of the first connecting rod is fixedly connected on first ladder, the slidable company in the second end of first connecting rod
It is connected on the first lateral support bar；The second connecting rod has two ends, and the respectively first end of second connecting rod and first connects
Second end of bar, the first end of the second connecting rod is fixedly connected on second ladder, the second end energy of second connecting rod
That slides is connected on the first lateral support bar；First locking device is slidable to be arranged on the first lateral support bar
On, first locking device connects the first connecting rod and second connecting rod simultaneously.
Further, first locking device includes：
First lock sleeve, is set on the first lateral support bar, and first lock sleeve is the annular with opening,
First lock sleeve has the first lock sleeve first end and first the second end of lock sleeve；The opening is arranged on first lock
Between tight set first end and first the second end of lock sleeve；
The regulating bolt of the openings of sizes is controlled, through the opening, and first lock sleeve first is connected to
Between end and first the second end of lock sleeve；The length side of the vertical first lateral support bar of the length direction of the regulating bolt
To；The head end of the regulating bolt is nut, and the tail end of the regulating bolt is screw rod end；
The hinge of locking device, is arranged on the tail end of the regulating bolt, the vertical tune of length direction of the hinge
Save the length direction of bolt and the length direction of the parallel first lateral support bar；
Eccentric cam, is hinged on the hinge of the locking device and the outer rim of eccentric cam is pressed on first lock
On the lateral surface at the second end of tight set；
Handle, connects the eccentric cam；
Returning spring is locked, is set in the regulating bolt and positioned at the first lock sleeve first end and the first lock
Between the second end of tight set.
Further, the folding ladder also includes：Terraced joint, for first ladder and second ladder of being articulated and connected,
The terraced joint includes：
First locking teeth, is fixedly connected with first ladder；
Second locking teeth, rotates with second ladder and is connected；
First ladder and second ladder are rotated by the first hinge to be connected；
First locking teeth and second locking teeth intermeshing, and first locking teeth and second lock
Tight tooth is one-way locking.
Further, first locking teeth is semi-circular gear, the axle center of the semi-circular gear and the described first hinge
With one heart, second locking teeth has second end at two ends, the respectively first end of the second locking teeth and the second locking teeth, institute to axle
Stating the second locking teeth also has medial surface and lateral surface, and the first end of second locking teeth passes through the second hinge with second ladder
Axle is articulated and connected, and the semi-circular gear is located between first hinge and second hinge；Second locking teeth
The post spring of return action is compressed on second end, the medial surface of second locking teeth is circular arc, second locking teeth
Medial surface be provided with the tooth engaged that is meshed with semi-circular gear, the post spring is pressed on the second end of second locking teeth
On the lateral surface at place.
Further, the terraced joint also includes：It is coated on the first outer box outside first locking teeth, and cladding
The second outer box outside second locking teeth, first outer box are cut with scissors with second outer box by first hinge
Connect；
First locking teeth is fixedly connected in first outer box, and second locking teeth passes through second hinge
It is hingedly connected in second outer box；First locking teeth is fixed by first outer box and first ladder to be connected
Connect；Second locking teeth is connected by being rotatably connected in second outer box with second ladder, outside described second
The spring base for supporting the post spring is additionally provided with box.
Further, the torsion spring for replying second locking teeth is arranged with second hinge.
Further, first outer box have the first end of the first outer box and the second end of the first outer box, described second
Outer box have a first end of the second outer box and the second end of the second outer box, and the of the first ends of first outer box and the second outer box
One end is hinged；Second end of first outer box connects first ladder, and the second end of second outer box is fixedly connected
Second ladder；
The terraced joint also includes：Bracing wire, connects the second end of second locking teeth, and the bracing wire is located at described second
In outer box, and stretch out the second end of second outer box and be connected on the outer surface of second ladder；
The bracing wire connects the second end of second locking teeth by being located in the post spring；
The guider being oriented to the bracing wire is additionally provided with second outer box；
The outer surface of second ladder is provided with the spanner for connecting the bracing wire.
Applicant is having found after being studied for a long period of time to the folding ladder with lateral support bar：Lateral support bar is in heavy burden feelings
Under condition, why easy bending even fractures, and its main cause is：Lateral support bar is expansion link, and expansion link includes；Mutually interconnect
The first pole and the second pole connect, first pole and the second pole being capable of relative telescopics；First pole and second
Pole, which is respectively equipped with connecting hole, the connecting hole, is provided with shop bolt or positioning screw, first pole and the second pole
Shop bolt or positioning screw are located by connecting；Due to the first pole and the second pole of expansion link, to be designed with multiple height different
Connecting hole, and connecting hole number to be multiple, thus, these connecting holes produce influence on the intensity of expansion link, and current
Folding ladder is general in order to mitigate weight and be easy to carry, and use is all circular hollow lateral support bar, this circular
Hollow lateral support bar is in the case of provided with multiple connecting holes, it is difficult to bear larger point of heavy burden, thus easy bending is even
Fracture, applicant has found that, really in connection hole, lateral support bar is easiest to bending or even fractureed by careful contrast.
Therefore, applicant improves the structure at the position that the easy bending of lateral support bar even fractures, by the hollow of circle
Lateral support bar make hollow rectangular bar (including square pole) or the groove profile bar of rectangular cross-section into.After improvement, although, it is long
Square pole (including square pole) or the groove profile bar of rectangular cross-section are still provided with multiple connecting holes, still, due to cross sectional shape
Change, expansion link at least has more than two right angle corners, and the two or multiple right angle corners considerably increase expansion link
Tensile strength, compression strength and torsional strength, bear and have shared when heavy burden is depressed to lateral support bar or the pressure of expansion link,
Thus, the intensity of connection hole is added, the security performance of lateral support bar is improved.
And then, between the ladder that the first lateral support bar and ladder main, i.e. two panels are hinged respectively by first connecting rod and
Second connecting rod is connected, and so, is added the stability of the first lateral support bar, is added the first lateral support bar and be hinged with two panels
Ladder between internal connection stability and intensity, and then, by the first locking device to the first lateral support bar and ladder
Locked between the ladder that main body, i.e. two panels are hinged, arbitrarily open, subtract in use so as to avoid the first lateral support bar
Small potential safety hazard.
And then, it is fixedly connected in the first end of the first connecting rod on first ladder, the second of first connecting rod
End is slidable to be connected on the first lateral support bar；First locking device is arranged on the first lateral support bar, so,
Only slidable first locking device need to be set on the first lateral support bar, you can avoid in first ladder and second
The chute or track for rod slide are opened up on piece ladder, manufacture and the link installed is reduced, and can be by first
To the operation of the first locking device on lateral support bar, first connecting rod and second connecting rod are controlled respectively, accomplishes to kill two birds with one stone, accomplishes
Quick control and locking.
And then, by the first locking device with cam, bolt and spring reset structure, quick adjustment can be realized,
Rapid translating, locking is firm, and the effect of auto lock adds security.
And then, the first locking device is located at the lower section of the first connecting rod and second connecting rod, so, in staff from ladder
After getting off on son, locking can be achieved on the ground or unlock, it is not necessary to which it is to lock or unlock to climb to ladder again, it is ensured that upper ladder
The firm and safety of preceding ladder, it is ensured that the convenience that ladder is packed up after descending stair.
And then, terraced joint uses wheel gear locking, and two locking teeths are connected with two panels ladder respectively, so adjustment can be realized
The multifarious change of angle and adjustment it is continuous, it is thus possible to adapt to the change of folding ladder opening angle.
And then, the utility model realizes auto lock using post spring, it is to avoid traditional locking needs the card of two panels ladder
The operation manually alignd is detained, the danger that ladder opens is reduced.And then, the utility model replys the using post spring and torsion spring jointly
Two locking teeths, one is to form dual fail-safe, and two are the reduction of the abrasion of post spring and torsion spring, adds the use longevity in whole joint
Life.
And then, the utility model controls the position of the second locking teeth using bracing wire, so that between controlling two locking teeths
Locking, so, it may not be necessary to as traditional snap lock needs to climb to the junction of the joint of ladder, i.e. ladder peak,
To lock or unlock buckle, the utility model can realize locking or unblock two panels ladder in the bottom stear drawing line of ladder
Son, it is to avoid each folding needs to climb to the operation on ladder summit again when packing up ladder, reduces accident odds, increases
Security is added, has been also convenient for quickly packing up.
And then, stable lateral support and reliable locking due to having, and lateral support bar are flexibly rotated, this practicality
New folding ladder is particularly suitable for use in the occasion of field and rough terrain.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of the folding ladder of the utility model embodiment；
Fig. 2 is the structural representation in the first section of the expansion link of the utility model embodiment；
Fig. 3 is the structural representation in second of section of the expansion link of the utility model embodiment；
Fig. 4 is the structural representation of the first locking device of the utility model embodiment；
Fig. 5 is the external structure schematic diagram in the terraced joint of the utility model embodiment；
Fig. 6 is the internal structure schematic diagram in the terraced joint according to the utility model embodiment.
Drawing reference numeral explanation：
11st, first ladder 12, second ladder 13, the first lateral support bar 14, the second lateral support bar
131st, the first pole 132, the second pole 1310, connecting hole 1311, first are at 1312, second 1313,
Three at the 1314, the 4th the 1315, the 5th side
151st, first connecting rod 152, second connecting rod 153, third connecting rod 154, fourth link 111, the first vertical edge 112,
Second vertical edge
27th, the first locking device 270, the first lock sleeve 21, regulating bolt 22, hinge 23, eccentric cam 24, hand
Handle 25, locking returning spring 201, opening
10th, terraced joint 1, the first locking teeth 2, the second locking teeth 3, the first outer box 4, the second outer box 5, the first hinge 6,
Bracing wire 7, the second hinge 8, spring base 9, post spring 20, Wire channel in building 30, rivet 30, rivet 32, the second end of the first outer box
42nd, the second end 45 of the second outer box, guider 50, connecting portion
Embodiment
In order to be more clearly understood to technical characteristic of the present utility model, purpose and effect, now control is illustrated
The utility model.
As shown in figure 1, folding ladder includes：Ladder that two panels is hinged and the side set respectively in the both sides of two panels ladder
To support bar, the ladder that two panels is hinged is respectively first ladder 11 and second ladder 12, and the lateral support bar is respectively
The the first lateral support bar 13 for being arranged on the side of two panels ladder first and the second lateral support for being arranged on the side of two panels ladder second
Bar 14；First lateral support bar 13 is located at first ladder 11 and the rectangular parallelepiped space or trapezoidal shape of second formation of ladder 12 are empty
Between outside, the second lateral support bar 14 also is located at the rectangular parallelepiped space or halfpace of first ladder 11 and the formation of second ladder 12
Outside shape space；
The first lateral support bar and/or the second lateral support bar are expansion link, and the expansion link at least includes；Mutually
The first pole 131 and the second pole 132 of connection, first pole and the second pole being capable of relative telescopics；The first segment
Bar and the second pole are respectively equipped with the different connecting hole 1310 of multiple height, the connecting hole provided with shop bolt or positioning spiral shell
Nail, first pole and the second pole shop bolt or positioning screw are located by connecting；
The pole of first pole 131 and second is rectangular bar；Or as shown in Fig. 2 first pole and second
The cross section of pole is the groove profile of rectangle, and the cross section at least includes：First side on three sides, respectively rectangle of rectangle
1311st, second at 1312 and the 3rd 1313, and three sides of rectangle form two right angle corners, and connecting hole 1310 is located at the second side
In plane where 1312.
When connecting hole 1310 is located on the second side 1312, the plane where the second side 1312 undertakes the negative of lateral support bar
Weight, first 1313 then directly supports at 1311 and the 3rd to the Planar realization where the second side 1312, relative to circular pin
For, the first of the groove profile bar of this rectangle is 1313 vertical with the second side 1312 at 1311 and the 3rd, therefore, the first side
1311 and the 3rd at 1313 pair second 1312 support strength be far longer than the circumferential support of connection hole in circular pin, institute
With, although, the groove profile bar of rectangular bar (including square pole) or rectangular cross-section is still provided with multiple connecting holes, still, due to
The change of cross sectional shape, expansion link at least has more than two right angle corners, and the two or multiple right angle corners are greatly increased
The tensile strength of expansion link, compression strength and torsional strength, to lateral support bar or stretch when bearing and having shared heavy burden pressure
The pressure of contracting bar, thus, the intensity of connection hole is added, the security performance of lateral support bar is improved.
Further, it is described as shown in figure 3, the cross section of first pole and the second pole is the groove profile of rectangle
Cross section includes：The first of the rectangle of tandem array is at 1311, second 1312 and the 3rd side 1313 successively, first side
1311 and the 3rd side 1313 be opposite side, connecting hole 1310 is located in the plane where the second side 1312；The cross section also includes：
Be connected to described first while head end the 4th while 1314 and 1315, the 4th side when being connected to the 3rd in the 5th of tail end
1314 are located on straight line and 1312 when parallel described second with the 5th while 1315, and the 4th side 1314 and the 5th
While 1315 length sum be less than described second while 1312, the described 4th at 1314 and the 5th 1315 between form breach, lack
On the one hand mouth can mitigate weight, on the other hand, be easy to repair and install, be easy to walk bracing wire and wire rope handling.
The section of expansion link shown in Fig. 3 has had more the 4th at 1314 and the 5th 1315 than the section shown in Fig. 2, relatively
In Fig. 2 rectangle slot cross-section, the 4th at 1314 and the 5th 1315 again add two right angle corners, reach the section of expansion link
To 4 right angle corners, so, the intensity of expansion link is further increased, moreover, the 4th at 1314 and the 5th 1315 increased two
Individual right angle corner so that the support of lateral support bar is more stable, the 4th in 1314 and the 5th while 1315 protection under, the first side
1311 and the 3rd side 1313 when being supported on ground, it is more difficult outwards to bypass, first at 1311 and the 3rd 1313 fulcrum more
Plus stably, either undertaking in heavy burden, or in the fixation on ground, Fig. 3 expansion link has better performance.It is flexible
The first pole and the second pole of bar can be integrally formed using aluminium alloy or be molded using other metal materials.
Further, as shown in figure 4, the folding ladder also includes：
First connecting rod 151, is movably connected between the lateral support bar 13 of first ladder 11 and first；For example, the
One connecting rod 151 is slidable to be connected between the lateral support bar 13 of first ladder 11 and first；
Second connecting rod 152, is movably connected between the lateral support bar 13 of second ladder 12 and first；For example, the
Two connecting rods 152 are slidable to be connected between the lateral support bar 13 of second ladder 12 and first；
The first locking device 27 of the first connecting rod and second connecting rod is locked, the first connecting rod and second is connected and connects
Bar；First connecting rod or second connecting rod can be locked with a locking device respectively, can also share a locking device locking；
First locking device 27 be arranged on first ladder or be arranged on second ladder or
It is arranged on the first lateral support bar.Between the ladder that first lateral support bar and ladder main, i.e. two panels are hinged respectively
Connected by first connecting rod and second connecting rod, so, add the stability of the first lateral support bar, add the first lateral branch
The stability and intensity of internal connection between the ladder that strut and two panels are hinged, and then, by the first locking device to the first side
Locked between the ladder being hinged to support bar and ladder main, i.e. two panels, so that avoiding the first lateral support bar makes
Arbitrarily opened in, reduce potential safety hazard.
Further, the folding ladder with locking device also includes：
Third connecting rod 153, is movably connected between the lateral support bar 14 of first ladder 11 and second；
Fourth link 154, is movably connected between the lateral support bar 14 of second ladder 12 and second；
Lock the third connecting rod and and/or fourth link the second locking device, connect the third connecting rod and/or the
Double leval jib；Second locking device is arranged on first ladder or is arranged on second ladder or set
On the second lateral support bar.
It is, ladder both sides are symmetrical structures, as the lateral support bar on both sides is with the structure of locking device, with
Realize that stress is symmetrical.
Further, as shown in figure 4, the first connecting rod 151 have two ends, respectively first connecting rod first end (on
End) and first connecting rod the second end (lower end), the first end of the first connecting rod is fixedly connected on first ladder 11,
Second end of first connecting rod is slidable to be connected on the first lateral support bar；The second connecting rod 12 has two ends, point
Not Wei second connecting rod first end (upper end) and the second end (lower end) of first connecting rod, the first end of the second connecting rod, which is fixed, to be connected
It is connected on second ladder, the second end of second connecting rod is slidable to be connected on the first lateral support bar；It is described
First locking device 27 is slidable to be arranged on the first lateral support bar 13, and first locking device 27 connects described simultaneously
First connecting rod 151 and second connecting rod 152.
So, only slidable first locking device 27 need to be set on the first lateral support bar 13, you can avoid
The chute or track for rod slide are opened up on first ladder and second ladder, manufacture and the link installed is reduced,
And can be by the operation on the first lateral support bar to the first locking device, while controlling first connecting rod and second to connect
Bar, accomplishes to kill two birds with one stone, and accomplishes quick control and locks.
Further, first locking device 27 includes：
First lock sleeve 270, elastic can be set on the first lateral support bar 13, can divide on the first lock sleeve
The rotating shaft that She Zhi be connected with first connecting rod, and the rotating shaft connected with second connecting rod, first connecting rod and second connecting rod being capable of phases
First lock sleeve is independently rotated；First lock sleeve is the annular with opening 201, for example, square with opening 201
The annular of shape, the first lock sleeve can be provided with lug on the outer wall of the offside of opening 201, for setting respectively and first connecting rod
The rotating shaft of connection, and the rotating shaft connected with second connecting rod；First lock sleeve has the first lock sleeve first end and first
The end of lock sleeve second；The opening 201 is arranged between the first lock sleeve first end and first the second end of lock sleeve；When
When the opening of one lock sleeve 270 is loosened, there is sky between the outer wall of the inwall of the first lock sleeve 270 and the first lateral support bar 13
Gap, the first lock sleeve 270 can be slided on the first lateral support bar 13；When the opening of the first lock sleeve 270 is tightened up,
Space between the outer wall of the inwall of first lock sleeve 270 and the first lateral support bar 13 eliminates or reduced, the first lock sleeve 270
The outer wall of inwall and the first lateral support bar 13 fit or push against, the two forms static friction so that the first lock sleeve 270 is consolidated
It is scheduled on the first lateral support bar 13, forms the locking of each connecting rod；
The regulating bolt 21 of control 201 sizes of the opening, through the opening 201, and is connected to first lock
Between 270 first ends of tight set and first the second end of lock sleeve；The length direction of the regulating bolt 21 is vertical described first lateral
The length direction of support bar 13；The head end of the regulating bolt is nut, and the tail end of the regulating bolt is screw rod end；
The hinge 22 of locking device, is arranged on the tail end of the regulating bolt 21, and the length direction of the hinge 22 is vertical
The length direction of the length direction of the regulating bolt and the parallel first lateral support bar 13；
Eccentric cam 23, be hinged on the hinge 22 of the locking device and eccentric cam 23 outer rim be pressed on it is described
On the lateral surface at first the second end of lock sleeve；
Handle 24, is arranged on the first lateral support bar 13 and connects the eccentric cam 23；
Returning spring 25 is locked, is set in the regulating bolt 22 and positioned at the first lock sleeve first end and the
Between one the second end of lock sleeve.
Handle 24 is pulled with hand, drives eccentric cam 23 to be rotated around hinge 22, during eccentric cam 23 is rotated, is driven
Regulating bolt 21 is tightened up or loosened, so that have adjusted the size of opening 201, thus, when the opening of the first lock sleeve 270 is tightened up
When, the space between the outer wall of the inwall of the first lock sleeve 270 and the first lateral support bar 13 eliminates or reduced, the first lock sleeve
The outer wall of 270 inwall and the first lateral support bar 13 is fitted or pushed against, and the two forms static friction so that the first lock sleeve
270 are fixed on the first lateral support bar 13, form locking.Returning spring 25, for example, compression spring are locked, is risen automatic
Return action, in favor of auto lock.Pass through the first locking device with cam, bolt and spring reset structure, Neng Goushi
Now quick adjustment, rapid translating, locking is firm, and the effect of auto lock adds security.
Further, first locking device 27 is located at the lower section of the first end of the first connecting rod 151, and is located at
The lower section of the first end of the second connecting rod 152.So, after staff descends on a ladder, it can be achieved on the ground
Locking is unlocked, it is not necessary to which it is to lock or unlock to climb to ladder again, it is ensured that the firm and safety of ladder before upper ladder, it is ensured that under
The convenience that ladder is packed up after ladder.
Further, first ladder 11 and second ladder 12 are articulated and connected by the first hinge, and described first
Piece ladder includes：First vertical edge 111, the second vertical edge 112 and it is connected to multiple between first vertical edge and the second vertical edge
Horizontal edge, the first end of the first connecting rod is fixedly connected on the first vertical edge of first ladder, the first connecting rod 151
First end (upper end) and first hinge distance be the first connecting rod bottom of the first end with first ladder
Hold the 1/8 to 1/2 of the distance of (earth terminal).So, the position of first connecting rod sets reasonable, can accomplish angle adjustment and length
Adjustment, can make first connecting rod rationally undertake stress, share the overall stress of ladder, mitigate the stress at other positions.Especially,
The first end (upper end) of one connecting rod 151 and the distance of first hinge be the first connecting rod first end with described first
The 1/6 to 1/4 of the distance of the bottom (earth terminal) of ladder, this ratio is adapted to undertake reasonable mechanical.
Further, the first vertical edge 111 of first ladder, the first connecting rod 151 and the first lateral branch
In the formation triangle of strut 13, the triangle, the folder of the first vertical edge 111 and the first connecting rod 151 of first ladder
Angle is 120 degree to the maximum, can meet larger adjustable range, can accomplish rational loading angle again.
Further, when the first vertical edge of first ladder and the angle of the first connecting rod are 120 degree to the maximum,
The angle of the first connecting rod and the first lateral support bar is 60 degree, the first vertical edge of first ladder and described
The angle of one lateral support bar is 60 degree, and so, bearing distribution is reasonable.
Further, the maximum angle of first ladder 11 and second ladder 12 is 60 degree.So as to realize
The angle of first ladder and second ladder is 60 degree, and the angle of first connecting rod and the first lateral support bar is 60 degree,
First vertical edge of first ladder and the angle of the first lateral support bar are 60 degree, that is, realize first connecting rod, institute
Stating the tetrahedron that the first lateral support bar, first ladder and second ladder formed has multiple 60 degree of angles, is formed many
The tetrahedron of individual equilateral and isogonism so that whole ladder is to reach most stable of structure in mechanical property.
Further, first ladder 11 and second ladder 12 are rotated by the first hinge 5 connects, the first lateral support
Bar 13 connects the first hinge 5 by connecting portion 50 (being, for example, connecting plate), and the head end of connecting portion is with the first lateral support bar 13
It is articulated and connected, meanwhile, the tail end of connecting portion is also to be articulated and connected with the first hinge 5.If unrestricted, connecting portion and the first side
360 degree of rotations can be done around the first hinge 5 to support bar 13, due to the limitation of first ladder 11 and second ladder 12, institute
The slewing area for stating the first lateral support bar 13 is hemispherical, adds the flexibility of ladder adjustment.
First lateral support bar 13 is located at the rectangular parallelepiped space or halfpace of first ladder 11 and second formation of ladder 12
Outside shape space, the second lateral support bar 14 also be located at first ladder 11 and the formation of second ladder 12 rectangular parallelepiped space or
Outside trapezoidal shape space, the first lateral support bar 13 and two lateral support bars 14 can be located at first ladder 11 and second ladder
The centre position of son 12, can also be located at the non-intermediate positions of first ladder 11 and second ladder 12, can be according to reality
Application feature is adjusted.
Further, as shown in figure 1, the folding ladder also includes：Terraced joint 10, for first ladder 11 that be articulated and connected
With second ladder 12, as shown in figure 1, every ladder has two parallel vertical supporting bars for being supported on ground and connection
The different horizontal stroke ladder of multiple height between two parallel vertical supporting bars, people is climbed by horizontal ladder；Such as Fig. 5 and Fig. 6
Shown, the terraced joint 10 includes：
First locking teeth 1, is fixedly connected with first ladder 11；
Second locking teeth 2, rotates with second ladder 12 and is connected, i.e., the second locking teeth 2 can be relative to second
Ladder 12 is rotated；
First ladder 11 and second ladder 12 are rotated by the first hinge 5 to be connected；
First locking teeth 1 and second locking teeth 2 are intermeshed, and first locking teeth 1 and described
Two locking teeths 2 are one-way locking, for example, when first ladder 11 and second ladder 12 mutually close up, the first locking teeth 1 and institute
Gear drive can be formed by stating the second locking teeth 2, and first ladder 11 and second ladder 12 are located remotely from each other, when angle becomes big,
First locking teeth 1 and second locking teeth 2 are locked, in case ladder is outwards sliped off in use.
Further, first locking teeth 1 is semi-circular gear, because the maximum opening angle of ladder is 180 degree, institute
To be just sufficient for the maximum opening angle of ladder using semi-circular gear, so as to reduce cost, alleviate weight, space
It is more compact；The axle center of the semi-circular gear 1 and first hinge 5 are concentric, and second locking teeth 2 has two ends, respectively
Second end of first end and the second locking teeth for the second locking teeth, second locking teeth also has medial surface and lateral surface,
The first end of second locking teeth is articulated and connected with second ladder by the second hinge 7, and the semi-circular gear 1 is located at institute
State between the first hinge 5 and second hinge 7；The post spring of return action is compressed on second end of second locking teeth
9, the medial surface of second locking teeth 2 is the gear or coaxial with the first hinge of circular arc, the circular arc and the first locking teeth,
So that the second locking teeth 2 is meshed with the first locking teeth, the medial surface of second locking teeth is provided with and semi-circular gear phase
The tooth engaged of engagement, the post spring 9 is pressed on the lateral surface at the second end of second locking teeth, unidirectional to realize
Locking.
In the case of the External force interference of nobody, post spring (cylindrical spring) 9 causes the automatic impaction of the second locking teeth 2 the
In one locking teeth 1, when the second locking teeth 2 is inwardly rotated relative to the first locking teeth 1, the second locking teeth 2 is by inside effect
Power, i.e. the second locking teeth 2 by the first extreme direction from power from the second end of the second locking teeth to the second locking teeth, now, by
It is fixing end in the first end of the second locking teeth, the first end of the second locking teeth is immovable, so as to prevent the phase of the second locking teeth 2
First locking teeth 1 is inwardly rotated, so as to prevent two panels ladder from opening；But first locking teeth 1 relative for the second locking teeth 2 to
Outer to rotate, now, the second locking teeth 2 is by the outside thrust of the first locking teeth 1, and the second end of the second locking teeth is on-fixed
End, because the second locking teeth 2 is more than the return action power of post spring 9 by the outside thrust of the first locking teeth 1, though there is post spring 9
Return action power, but do not influence the second locking teeth 2 to be turned out relative to the first locking teeth 1 or mobile, thus, the second locking teeth 2
The pressure and the second locking teeth 2 being pressed in the first locking teeth 1 relatively rotate not contradiction, thus 2 relative turns of the second locking teeth
Dynamic unaffected, i.e., when two panels ladder closes up, joint does not influence packing up or closing up for ladder.
Further, the terraced joint 10 also includes：The first outer box 3 outside first locking teeth 1 are coated on, and
The second outer box 4 outside second locking teeth 2 are coated on, first outer box 3 pass through described first with second outer box 4
Hinge 5 is hinged；First outer box 3 can be relatively rotated with second outer box 4, different angles be formed, so as to form ladder
Different subtended angles；
First outer box 3 are fixedly connected with first ladder 11, and the second ladder 12 of outer box 4 second is fixedly connected；
First locking teeth 1 is fixedly connected in first outer box 3, and second locking teeth 2 passes through described second
Hinge 5 is hingedly connected in second outer box 4；First locking teeth 1 passes through first outer box 3 and first ladder
Son 11 is fixedly connected；Second locking teeth 2 is rotatably connected in second outer box and described second by the second hinge 7
Ladder 12 is connected, and the spring base 8 for supporting the post spring 9 is additionally provided with second outer box 4.Outside first outer box 3 and described second
Box 4 mainly plays a part of to close off and protects corresponding locking teeth, and provides fixed for corresponding locking teeth and support；Can be with
Support is provided for post spring 9.
Further, the torsion spring that being arranged with second hinge 7 replys second locking teeth 2 (does not show in figure
Go out).Torsion spring also functions to return action, can make two locking teeth auto locks in the case of the External force interference of nobody.Its
In, the second hinge 7 is arranged in the second outer box 4, and the bottom of the second hinge 7 stretches out the second locking teeth 2 and exposes the second outer box
4, the second locking teeth 2 is stretched out at the top of the second hinge 7, and torsion spring is respectively sleeved at the bottom of the second hinge 7 and the top of the second hinge 7
Portion, that is, be respectively sleeved at the two ends of the second hinge 7, on the one hand can play return action, on the other hand, moreover it is possible to play to second
Hinge 7 carries out the effect of axially position and buffering, plays good counterbalance effect.
Further, first outer box 3 have the first end of the first outer box and the second end 32 of the first outer box, described the
Two outer box 4 have outside the first end of the second outer box and the second end 42 of the second outer box, the first end and second of first outer box
The first end of box is hinged；Second end 32 of first outer box connects first ladder 11, the second of second outer box
End 42 is fixedly connected with second ladder 12；
The terraced joint 10 also includes：Bracing wire 6, connects the second end of second locking teeth 5, and the bracing wire 6 is located at institute
The second end 42 stated in the second outer box 4 and stretch out second outer box is connected on the outer surface of second ladder, and (second
Piece ladder or its vertical edge are hollow, and bracing wire is passed from the inside cabling of vertical edge from the side wall of second ladder or vertical edge), institute
The outer surface of second ladder is stated provided with the spanner for connecting the bracing wire；Second end of the second locking teeth 2 and the first locking teeth 1
After locking, bracing wire can overcome the pressure of torsion spring, pull the second end of the second locking teeth 2, take off the second end of the second locking teeth 2
From the contact with the first locking teeth 1, so as to release the locking with the first locking teeth 1, so, ladder can be opened；Second locking
After second end of tooth 2 is locked with the first locking teeth 1, when not exerted a force to bracing wire, the second end of the second locking teeth 2 and the first locking
Tooth 1 then keeps occlusion, maintains locking, now, two panels ladder can not outwards be opened, but two panels ladder inwardly can then be packed up；By
Second ladder 12 is fixedly connected with the second end 42 of the second outer box, so equivalent to extending to the second locking teeth 2
Length is controlled, can be extended at locking teeth at second ladder, control height is reduced.Locked using bracing wire control second
The position of tight tooth, so as to control the locking between two locking teeths, so, it may not be necessary to as traditional snap lock needs to climb to
The junction of the joint of ladder, i.e. ladder peak, to lock or unlock buckle, the utility model can be in the bottom of ladder
Stear drawing line is so as to realizing locking or unblock two panels ladder, it is to avoid each folding needs to climb to ladder top again when packing up ladder
The operation of point, reduces accident odds, adds security, be also convenient for quickly packing up.
Further, the bracing wire 6 connects the second end of second locking teeth 2 by being located in the post spring 9, this
Sample, sets ingenious, the problem of will not occurring guy winding miscellaneous part.Second end of the second locking teeth 2 can be provided with Wire channel in building
20, so that bracing wire is fixed to the second end of the second locking teeth 2.
Further, the guider 45 being oriented to the bracing wire 6 is additionally provided with second outer box 4, drawing can be adjusted
The direction of line 6.Guider 45 is, for example, lead.
Further, the semi-circular gear is provided with 6 to 90 teeth, for example, 20 to 60 equally distributed teeth, so
Fine-tuning for the continuous multi-angle in the range of 180 degree can be realized, the various needs that ladder opens are disclosure satisfy that.
Further, second locking teeth 2 is the rack with annular medial surface, and the number of teeth of the rack is 3 to 6
It is individual.Because the first locking teeth 1 has multiple teeth, 180 degree rotation can be carried out, thus, the second locking teeth 2 only needs several teeth just
Enough, the length of the second locking teeth 2 can accomplish smaller, and it is less that the number of teeth can be done, convenient manufacture processing and installation, mitigate ladder
Quality.
Further, the semi-circular gear is fixed in first outer box 3 by more than two rivets 30, example
Such as, fixed with 3 rivets, so, the fixing-stable of the first locking teeth 1 will not be rotated relative to the first outer box 3.
Further, first outer box 3 and second outer box 4 are two-piece unit formula structure, main protection and envelope
The upper and lower ends of the first locking teeth 1 and second locking teeth 2 are closed, the first outer box 3 are with second outer box 4 in the first locking teeth
1 and the intermeshing of the second locking teeth 2 at be provided with opening, not influence the engagement and rotation of two locking teeths, the first outer box 3
With second outer box 4 be divided into above and below two halves, to re-form envelope after installing the first locking teeth 1 and second locking teeth 2
Close.
Terraced joint of the present utility model can realize that the stable locking of folding ladder and multi-angle are accurately adjusted.The utility model
Control to lock using bracing wire, it may not be necessary to as traditional snap lock needs to climb to the joint of ladder, i.e. ladder peak
Junction, to lock or unlock buckle, the utility model can realize locking or unlock in the bottom stear drawing line of ladder
Two panels ladder, it is to avoid each folding needs to climb to the operation on ladder summit again when packing up ladder, reduces accident generation
Probability, adds security, is also convenient for quickly packing up.Folding ladder of the present utility model, locking is firm, is adapted to various landform, bag
Include the mountain area of injustice, therefore also referred to as full landform ladder.
The schematical embodiment of the utility model is the foregoing is only, model of the present utility model is not limited to
Enclose.It can be mutually combined under conditions of not conflicting for each part of the present utility model, any those skilled in the art,
Made equivalent variations and modification, all should belong to this practicality new on the premise of design of the present utility model and principle is not departed from
The scope of type protection.
Claims (10)
1. a kind of folding ladder, it is characterised in that the folding ladder includes：The ladder that two panels is hinged and two in two panels ladder
The lateral support bar that side is set respectively, the ladder that two panels is hinged is respectively first ladder and second ladder, the lateral branch
Strut is respectively to be arranged on the first lateral support bar of the side of two panels ladder first and be arranged on the second of the side of two panels ladder second
Lateral support bar；
The first lateral support bar and/or the second lateral support bar are expansion link, and the expansion link at least includes；It is connected with each other
The first pole and the second pole, first pole and the second pole being capable of relative telescopics；First pole and second section
Bar, which is respectively equipped with the different connecting hole of multiple height, the connecting hole, is provided with shop bolt or positioning screw, the first segment
Bar and the second pole shop bolt or positioning screw are located by connecting；
First pole and the second pole are rectangular bar；Or the cross section of first pole and the second pole is rectangle
Groove profile, the cross section at least includes：Three sides of rectangle.
2. folding ladder as claimed in claim 1, it is characterised in that the cross section of first pole and the second pole is square
The groove profile of shape, the cross section includes：Successively the first of the rectangle of tandem array while, second while and the 3rd side, first side
It is opposite side with the 3rd side, the cross section also includes：Be connected to described first while head end the 4th while and be connected to the 3rd side
5th side of tail end, the described 4th is located on straight line and parallel second side while with the 5th, and the described 4th
While and length sum when the 5th be less than second side, the described 4th at the 5th between form breach.
3. folding ladder as claimed in claim 1 or 2, it is characterised in that the folding ladder also includes：
First connecting rod, is movably connected between first ladder and the first lateral support bar；
Second connecting rod, is movably connected between second ladder and the first lateral support bar；
The first locking device of the first connecting rod and second connecting rod is locked, the first connecting rod and second connecting rod is connected；
First locking device is arranged on the first lateral support bar.
4. folding ladder as claimed in claim 3, it is characterised in that the first connecting rod has two ends, respectively first connecting rod
First end and first connecting rod the second end, the first end of the first connecting rod is fixedly connected on first ladder,
Second end of one connecting rod is slidable to be connected on the first lateral support bar；The second connecting rod has two ends, is respectively
The first end of second connecting rod and the second end of first connecting rod, the first end of the second connecting rod are fixedly connected on second ladder
On son, the second end of second connecting rod is slidable to be connected on the first lateral support bar；First locking device can be slided
Dynamic is arranged on the first lateral support bar, and first locking device connects the first connecting rod and second connecting rod simultaneously.
5. folding ladder as claimed in claim 4, it is characterised in that first locking device includes：
First lock sleeve, is set on the first lateral support bar, and first lock sleeve is the annular with opening, described
First lock sleeve has the first lock sleeve first end and first the second end of lock sleeve；The opening is arranged on first lock sleeve
Between first end and first the second end of lock sleeve；
Control the regulating bolt of the openings of sizes, through the opening, and be connected to the first lock sleeve first end and
Between first the second end of lock sleeve；The length direction of the vertical first lateral support bar of the length direction of the regulating bolt；
The head end of the regulating bolt is nut, and the tail end of the regulating bolt is screw rod end；
The hinge of locking device, is arranged on the tail end of the regulating bolt, the vertical regulation spiral shell of length direction of the hinge
The length direction of the length direction of bolt and the parallel first lateral support bar；
Eccentric cam, is hinged on the hinge of the locking device and the outer rim of eccentric cam is pressed on first lock sleeve
On the lateral surface at the second end；
Handle, connects the eccentric cam；
Returning spring is locked, is set in the regulating bolt and positioned at the first lock sleeve first end and the first lock sleeve
Between second end.
6. folding ladder as claimed in claim 5, it is characterised in that the folding ladder also includes：Terraced joint, for being articulated and connected
First ladder and second ladder, the terraced joint includes：
First locking teeth, is fixedly connected with first ladder；
Second locking teeth, rotates with second ladder and is connected；
First ladder and second ladder are rotated by the first hinge to be connected；
First locking teeth and second locking teeth intermeshing, and first locking teeth and second locking teeth
For one-way locking.
7. folding ladder as claimed in claim 6, it is characterised in that first locking teeth is semi-circular gear, the semi-ring
The axle center of shape gear and first hinge are concentric, and second locking teeth has the first of two ends, respectively the second locking teeth
End and the second end of the second locking teeth, second locking teeth also have medial surface and lateral surface, the of second locking teeth
One end is articulated and connected with second ladder by the second hinge, and the semi-circular gear is located at first hinge and described second
Between hinge；The post spring of return action, the inner side of second locking teeth are compressed on second end of second locking teeth
Face is circular arc, and the medial surface of second locking teeth is provided with the tooth engaged being meshed with semi-circular gear, and the post spring is supported
It is pressed on the lateral surface at the second end of second locking teeth.
8. folding ladder as claimed in claim 7, it is characterised in that the terraced joint also includes：It is coated on first locking
The first outer box outside tooth, and be coated on the second outer box outside second locking teeth, first outer box and described the
Two outer box are hinged by first hinge；
First locking teeth is fixedly connected in first outer box, and second locking teeth is hinged by second hinge
It is connected in second outer box；First locking teeth is fixedly connected by first outer box with first ladder；
Second locking teeth is connected by being rotatably connected in second outer box with second ladder, in second outer box
It is additionally provided with the spring base for supporting the post spring.
9. folding ladder as claimed in claim 7, it is characterised in that being arranged with second hinge makes second locking teeth
The torsion spring of reply.
10. folding ladder as claimed in claim 8, it is characterised in that first outer box have the first outer box first end and
Second end of the first outer box, second outer box have the first end of the second outer box and the second end of the second outer box, described first
The first end of the first end of outer box and the second outer box is hinged；Second end of first outer box connects first ladder, institute
The second end for stating the second outer box is fixedly connected with second ladder；
The terraced joint also includes：Bracing wire, connects the second end of second locking teeth, and the bracing wire is located at second outer box
In, and stretch out the second end of second outer box and be connected on the outer surface of second ladder；
The bracing wire connects the second end of second locking teeth by being located in the post spring；
The guider being oriented to the bracing wire is additionally provided with second outer box；
The outer surface of second ladder is provided with the spanner for connecting the bracing wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720102760.2U CN206545479U (en) | 2017-01-23 | 2017-01-23 | Folding ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720102760.2U CN206545479U (en) | 2017-01-23 | 2017-01-23 | Folding ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206545479U true CN206545479U (en) | 2017-10-10 |
Family
ID=59993579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720102760.2U Expired - Fee Related CN206545479U (en) | 2017-01-23 | 2017-01-23 | Folding ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206545479U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593286A (en) * | 2017-01-23 | 2017-04-26 | 黄崇华 | Folding ladder |
| WO2018130166A1 (en) * | 2017-01-15 | 2018-07-19 | 黄崇华 | Folding stepladder |
-
2017
- 2017-01-23 CN CN201720102760.2U patent/CN206545479U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018130166A1 (en) * | 2017-01-15 | 2018-07-19 | 黄崇华 | Folding stepladder |
| CN106593286A (en) * | 2017-01-23 | 2017-04-26 | 黄崇华 | Folding ladder |
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