CN201116446Y

CN201116446Y - Folding bridge ladder

Info

Publication number: CN201116446Y
Application number: CNU2007200570369U
Authority: CN
Inventors: 袁士风
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-14
Filing date: 2007-09-14
Publication date: 2008-09-17
Anticipated expiration: 2017-09-14

Abstract

The utility model discloses a foldable bridge ladder, which comprises a support plate, a connection plate of the support plate, ladder legs, a pedal and a rotary control device, wherein the connection plate of the support plate is fixed on the internal side of the support plate, the ladder legs are in rotatable connection with the connection plate via pins, the pedal is connected between adjacent ladder legs, the rotary control device composed of a latching element and an operating element perforates the support plate, the connection plate of the support plate and ladder legs, wherein the latching element which is provided with bolts is fixed in ladder legs, the bolts can be movably inserted in pin holes of the connection plate of the support plate to prevent ladder legs from rotating, the operation element which is provided with a button penetrates the support plate is fixed in the connection plate of the support plate, one end of the button exposes out the support plate while the other end extends to the pin hole, when being pressed, the button extends in the pin hole to push the pin out, further to lead the pin detach the connection plate of the support plate, thereby the ladder legs can rotate relatively to the connection plate of the support plate and then be folded.

Description

Collapsible bridge ladder

Technical field

The utility model relates to a kind of bridge ladder, relates in particular to a kind of folding bridge ladder.

Background technology

At present, there is following shortcoming in existing ladder: the scope of activities of user on ladder is very little, if in the diverse location operation, will continuous mobile ladder, and climb up again and climb down, very inconvenient.In addition, also have a kind of bridge ladder (both sides are ladders, above frame one long slab, outer appearnce is like the bridge shape), the people can walk on the bridge ladder, has enlarged working space, but that its shortcoming is a volume is big, takies more space.Such as, Chinese patent discloses a kind of ladder ladder bridge dual-purpose frame for No. 03224754.0, has solved the problem that above-mentioned bridge ladder exists by following technical solution substantially.The technical scheme of aforementioned patent is: form described ladder ladder bridge dual-purpose frame by first ladder, second ladder, bridge plate A and bridge plate B, link to each other with folding between two bridge plates.When using terraced bridge two bridge plates are set up: when using ladder two bridge plate doublings are got final product.

Above-mentioned ladder ladder bridge dual-purpose frame though can reduce the volume of bridge ladder after folding, takies less space, but hang on the bolt because it need be buckled in peg when folding, and complicated pulling plug and pulling plug groove are arranged, therefore, not only complex structure is unfavorable for making, and uses very inconvenient.In addition, because the terraced leg of above-mentioned ladder ladder bridge dual-purpose frame fixes, can not stretching, not only influence the working depth of terraced bridge, and influence the volume of terraced bridge after folding.

Therefore, be badly in need of a kind of simple in structure being easy to and make, and the bridge ladder that is easy to fold easy to use.

The utility model content

The purpose of this utility model is to provide a kind of simple in structure being easy to make, and the bridge ladder that is easy to fold easy to use.

For achieving the above object, the technical solution of the utility model is: a kind of collapsible bridge ladder is provided, comprise gripper shoe, the gripper shoe junction plate, the ladder leg, pedal and rotating control assembly, described gripper shoe junction plate is fixed in the gripper shoe inboard, described terraced leg is connected in described gripper shoe junction plate by pin is rotatable, described pedal is connected between the adjacent terraced leg, described rotating control assembly is through described gripper shoe, gripper shoe junction plate and terraced leg, comprise latching portion and manoeuvre portion, described latching portion is fixed in the terraced leg, and has a latch, described gripper shoe junction plate is to being provided with pin hole by latch, described latch inserts this pin hole movably and prevents the relative gripper shoe junction plate rotation of terraced leg, described manoeuvre portion is passed gripper shoe and is fixed in the gripper shoe junction plate, described manoeuvre portion has button, described button one end exposes gripper shoe, the other end stretches to described pin hole, described button stretches into described pin hole when being subjected to pushing and ejects described latch, makes latch disengaging gripper shoe junction plate and makes the gripper shoe junction plate rotation relatively of terraced leg.

Preferably, described manoeuvre portion also has first fixture and first spring, described first fixture is fixed in the described gripper shoe junction plate, the end that described button stretches to pin hole is contained in first fixture, described first spring housing stretches on the end of pin hole at described button, and described first spring housing, one end is replaced button, the other end is replaced gripper shoe junction plate inwall, behind the pressing button, button can automatically restore to original position under the effect of first spring, realize automatically reset function, described first fixture has better limited the position of button, make automatically reset function more accurate, described latching portion also comprises second fixture, second spring and second fixing button, described second fixture is fixed in the terraced leg, the relative other end of one end of the insertion pin hole of described latch is contained in second fixture, described second fixing button is installed in the second fixture end, described second spring, one end is replaced latch, the other end is replaced second fixing button, latch can automatically restore to original position under the effect of second spring, realize automatically reset function.

Preferably, described gripper shoe comprises first gripper shoe and second gripper shoe, described first gripper shoe and second gripper shoe flexibly connect by linkage, described linkage comprises first bracing frame, second bracing frame and support bar, described first bracing frame, second bracing frame is separately positioned on first gripper shoe and link soffit place, second gripper shoe, two outside, on described first bracing frame and pivot joint of second bracing frame and the support bar, described support bar is connected between first bracing frame and second bracing frame of both sides, increase folder function of the present utility model, made volume littler.Described first gripper shoe and second gripper shoe all have draw-in groove, described gripper shoe junction plate is stuck in described first gripper shoe and the second gripper shoe draw-in groove, make like this and can be well gripper shoe junction plate and first gripper shoe and second gripper shoe be coupled together without other connector, both convenient disassembly had also been saved manpower and financial resources.The described first gripper shoe side has groove, and the described second gripper shoe side has the raised line with the corresponding fastening of groove of first gripper shoe.It is tightr that the gripper shoe of winning is contacted with second gripper shoe, and increased it and bear the ability of gravity.

Preferably, the sleeve pipe that described terraced leg is scalable transform length is formed, described pedal two ends have locking device, described locking device is installed on the sleeve pipe and fixed pedestal, described locking device comprises annular sheath body and ccontaining its interior bearing pin, the 3rd spring, spring load spare and push button, described annular sheath body one end is placed on the sleeve pipe, the other end inserts pedal, described bearing pin penetrates in the annular sheath body, described the 3rd spring one end is resisted against described bearing pin, the other end is placed in the described spring load plate, and described spring load plate is fixed in the annular sheath body, and described push button one end fastens described bearing pin middle part, the other end stretches out described annular sheath body and pedal, described sleeve pipe has and the corresponding pin shaft hole of described bearing pin, and described bearing pin one end is resisted against described the 3rd spring, and the other end passes annular sheath body movably and inserts pin shaft hole.When described push button is pushed and when driving bearing pin and breaking away from pin shaft hole, described locking device can move up and down on sleeve pipe, thereby adjusts the position of pedal, and therefore allows the telescopic tube adjustment of stretching, increase folder function of the present utility model, made volume littler.

The utility model is compared with prior art, because the rotating control assembly that adopts in the utility model bridge ladder, assemble by common standard component, have simple in structure, cost is low and the advantage that is easy to make, and a pressing operation can fold, folding more convenient between terraced leg and gripper shoe, saved the time, folding rear ladder leg is close to gripper shoe, can effectively reduce the volume after folding, and helps carrying and putting.

Description of drawings

Fig. 1 a is the stereogram of the collapsible bridge ladder of the utility model.

Fig. 1 b is the structural representation of the collapsible bridge ladder of the utility model.

Fig. 2 is the three-dimensional exploded view of collapsible bridge ladder shown in Fig. 1 a.

Fig. 3 is the three-dimensional exploded view of the rotating control assembly of the collapsible bridge ladder of the utility model.

Fig. 4 is the structural representation that the revolving joint of the collapsible bridge ladder of the utility model is connected with the inserted sheet of terraced leg.

Fig. 5 is the sectional view along the A-A line of Fig. 4

Fig. 6 is the stereogram of the locking device of the collapsible bridge ladder of the utility model.

Fig. 7 a is the structural representation of the separated position of first gripper shoe of the collapsible bridge ladder of the utility model and second gripper shoe.

Fig. 7 b is the structural representation of the connection status of first gripper shoe of the collapsible bridge ladder of the utility model and second gripper shoe.

Fig. 7 c is the enlarged drawing of A part among Fig. 1 b.

Fig. 8 a is the stereogram after the collapsible bridge ladder of the utility model folds.

Fig. 8 b is the front view of Fig. 8 a.

Fig. 8 c is the vertical view of Fig. 8 a.

Fig. 8 d is the upward view of Fig. 8 a.

The specific embodiment

As Fig. 1 a, Fig. 1 b and shown in Figure 2, the utility model bridge ladder comprises gripper shoe, four gripper shoe junction plates 41, four terraced legs 20, six pedals 30 and two rotating control assemblies 40.Described four gripper shoe junction plates 41 are fixed in the place, inboard of four jiaos of described gripper shoes, and described four terraced legs 20 are by the rotatable respectively gripper shoe junction plate 41 that is connected in correspondence of pin 412c.Wherein three pedals 30 are connected between the two adjacent terraced legs 20, and three pedals 30 are connected in addition between the two adjacent terraced legs 20 in addition.A described rotating control assembly 40 is installed on the gripper shoe junction plate 41 and gripper shoe of one of two adjacent terraced legs 20, correspondence, and another rotating control assembly 40 is installed on the gripper shoe junction plate 41 and gripper shoe of one of other two adjacent terraced legs 20, correspondence.Whether described rotating control assembly 40 lockables or open to control terraced leg 20 can be rotated, in more detail, when described rotating control assembly 40 is in the lock state, prevent terraced leg 20 rotations, thereby make the bridge ladder be fixed on state folding or that open, when described rotating control assembly 40 is in open mode, then allows terraced leg 20 rotations, thereby the bridge ladder is folded or opens.More specifically, described rotating control assembly 40 comprises latching portion 40b and manoeuvre portion 40a, described latching portion 40b is fixed in the terraced leg 20, and has a

latch

44b, 41 pairs of described gripper shoe junction plates should be provided with pin hole 411a by latch 44b, described latch 44b inserts this pin hole 411a movably and prevents terraced leg 20 relative gripper shoe junction plate 41 rotations, described manoeuvre portion 40a passes gripper shoe and is fixed in the gripper shoe junction plate 41, described manoeuvre portion 40a has button 44a, the button right-hand member 441a of described button 44a exposes gripper shoe, the button left end 440a of described button 44a stretches to described pin hole 411a, described button 44a stretches into described pin hole 411a when being subjected to pushing and contacts with the latch right-hand member 440b of described latch 44b, thereby eject described latch 44b, make latch 44b disengaging gripper shoe junction plate 41 and make terraced leg 20 by pin 412c gripper shoe junction plate 41 rotations relatively; When needs lock terraced leg and gripper shoe junction plate, the latch 44b that ejects is resetted in the pin hole 411a that promptly is inserted into gripper shoe junction plate 41, thereby gripper shoe junction plate 41 is locked with being connected of terraced leg 20, as allowing terraced leg 20 around pin 412c rotation again, then pushes above-mentioned button 44a and gets final product.

The preferably, described manoeuvre portion 40a also has the first fixture 43a and the first spring 45a, the described first fixture 43a is fixed in the described gripper shoe junction plate 41, the button left end 440a that described button 44a stretches to pin hole 411a is contained in the first fixture 43a, button right-hand member 441a exposes gripper shoe, the described first spring 45a is enclosed within on the button left end 440a of described button 44a, and an end is replaced button 44a, the other end is replaced gripper shoe junction plate 41 inwalls, behind the release-push 44a, button 44a can automatically restore to original position under the effect of the first spring 45a, realize automatically reset function, the described first fixture 43a has better limited the position of button 44a, make the more accurate of automatically reset function, described latching portion 40b also comprises the second fixture 43b, the second spring 45b and the second fixing button 45c, the described second fixture 43b is fixed in the terraced leg 20, the relative latch left end 441b of the latch right-hand member 440b with inserting pin hole 411a of described latch 44b is contained in the second fixture 43b, the described second fixing button 45c is installed in the second fixture 43b end, the described second spring 45b, one end is replaced the latch left end 441b of latch 44b, the other end is replaced the second fixing button 45c, latch 44b can automatically restore to original position under the effect of the second spring 45b, realize automatically reset function.

In conjunction with Fig. 3, Fig. 4 and shown in Figure 5, described terraced leg 20 upper ends have inserted sheet 24, above-mentioned inserted sheet 24 is provided with on the inserting-plate hole 241 and inserted sheet pin hole 242b, described latching portion 40b is fixed in the inserting-plate hole 241, described pin 412c passes in the junction plate pin hole 412a of the inserted sheet pin hole 242b of above-mentioned inserted sheet 24 and gripper shoe junction plate 41, makes terraced leg 20 to rotate around pin 412c; When rotating control assembly locks, the latch left end 441b of the latch 44b of rotating control assembly 40 is placed in the above-mentioned second fixing button 45c, the latch right-hand member 440b of latch 44b is inserted in the pin hole 411a of gripper shoe junction plate 41, because terraced leg makes it locked under the above-mentioned effect of pin 412c and latch 44b, promptly can not rotate around pin 412c; When rotating control assembly is opened, need the exert oneself button right-hand member 441a of pressing button 44a of rotating control assembly just can open, when exerting oneself pressing button 44a, button 44a will compress the connected first spring 45a, along with continuing of the power of pressing button 44a, the button left end 440a of button 44a will promote latch right-hand member 440b and move toward the direction away from pin hole 411a, during the latch right-hand member 440b pin hole 411a of latch 44b, the inserted sheet 24 of ladder leg 20 can rotate around pin 421c, thereby realizes the folding effect that folds terraced leg 20 and gripper shoe.Moving of above-mentioned latch 44b will be exerted pressure to the second spring 45b with its latch left end 441b butt, because the second spring 45b is butted in the second fixing button 45c, such second spring 45b will be compressed, just because of firmly pushing the button 44a that is positioned at junction plate gripper shoe 41 outsides win spring 45a and the second spring 45b are compressed respectively, because the character of spring self, in the compression spring, spring also gives one with the opposite elastic force of compressive force direction, when cancelling the power of compression spring, the elastic force of spring can show moment, make its object that is carried on the spring be subjected to a bigger elastic force effect, thereby can eject a segment distance to the object that is carried on the spring, therefore, when discharging by the power that is pressed on the button 44a, the above-mentioned first spring 45a and the second spring 45b are because compressed cause, after cancelling the power that it is caused compression, the first spring 45a and the second spring 45b will show an elastic force, thereby make the button 44a and the latch 44b that are carried on respectively on the first spring 45a and the second spring 45b reset respectively, the latch right-hand member 440b of latch 44b inserts in the pin hole 411a once more, thereby the inserted sheet 24 that prevents terraced leg 20 rotates around pin 421c, and is locked in folded state.

The preferably, as Fig. 1 a, Fig. 1 b, Fig. 2, shown in Figure 6, described terraced leg 20 is the sleeve pipe 21 of scalable transform length, 22,23 form, described pedal 30 two ends have locking device 60, described locking device 60 is connected in

sleeve pipe

21,22, on 23, described locking device 60 comprises annular sheath body 61 and ccontaining its 3rd interior bearing pin 62, the 3rd spring 63, spring load spare 64 and push button 65, annular mouth 66 1 ends of described annular sheath body 61 are placed in sleeve pipe 21, on 22 or 23, the other end inserts pedal 30, described the 3rd bearing pin 62 penetrates in the areole 62a of annular sheath body 61, described the 3rd spring 63 1 ends are connected with described the 3rd bearing pin 62, the other end is placed in the ccontaining hole 640 of described spring load plate 64, the baffle plate 641 of described spring load plate 64 is fixed in the annular sheath body 61, the support bar 650 of described push button 65 fastens on the middle part 620 of above-mentioned the 3rd bearing pin 62, the push button 651 of described push button 65 stretches out outside the described support rod hole 65a, described

sleeve pipe

21,22,23 have and described the 3rd bearing pin 62 corresponding pin shaft holes 200, in the present embodiment, the bridge ladder is only by three

joint sleeve pipes

21,22,23 form, and length characteristic according to every sleeve pipe, only need three pedals 30 to get final product, and the folding closing function of the utility model bridge ladder need can not well be realized at pedal 30 two ends overhead nearest or that go up most with locking device 60 yet, in the time of needs fixed pedestal 30, with regard to the locking device 60 that needs to be connected in pedal 30 two ends its terraced leg 20 is locked, concrete operations are as follows: when

sleeve pipe

21,22,23 stretch out fully, it is described

sleeve pipe

21,22,23 penetrate Elastip pin hole 202 on it by Elastip pin 201 between adjacent realizes its fixing between adjacent, with the locking device 60 at pedal 30 two ends move required with its position that will fix in, be selected near the place that has pin shaft hole 200 this position then, regulate the particular location of locking device 60, the pin shaft hole 200 of the areole 62a that makes the annular sheath body 61 in its locking device 60 on the sleeve pipe, an end of the 3rd bearing pin 62 in the locking device 60 will pass the areole 62a of annular sheath body 61 and extend in the pin shaft hole 200 under the elastic force effect of the 3rd spring 63 at this moment, thereby realize that the pedal 30 that locking device 60 will be installed is fixed on by

sleeve pipe

21,22, on the 23 terraced legs of being formed 20, fold by sleeve pipe 21 when needs are folding, 22,23 formed terraced leg 20 time, the push button 651 that need enforce push button 65 moves toward the direction away from pin shaft hole 200, moving of push button 651 will drive moving of connected push rod 650, moving of above-mentioned push rod 650 will drive moving of connected the 3rd bearing pin 62, above-mentioned the 3rd bearing pin 62 at push button 651 under effect away from the power of pin shaft hole 200, also move toward direction away from pin shaft hole 200, thereby compress connected the 3rd spring 63, meanwhile again with

sleeve pipe

21,22,23 shrink by the mode of pushing Elastip pin 201 and to get final product, when the areole 62a of annular sheath body 61 during not over against pin shaft hole 200 the 3rd spring 63 be to be compressed ground, this moment, the 3rd bearing pin 62 was and

sleeve pipe

21,22,23 tube wall contacts, realize the folding function that folds with this, when the areole 62a of annular sheath body 61 during over against pin shaft hole 200 the 3rd spring 63 will promote the 3rd bearing pin 62 and extend in the pin shaft hole corresponding 200 with it, realize 60 pairs of sleeve pipes 21 of locking device, 22,23 lock function.

The preferably, as Fig. 1 a, Fig. 1 b, Fig. 2, Fig. 7 a, shown in Fig. 7 b and Fig. 7 c, described gripper shoe comprises the first gripper shoe 10a and the second gripper shoe 10b, the described first gripper shoe 10a and the second gripper shoe 10b flexibly connect by linkage, described linkage comprises the first bracing frame 51a, the second bracing frame 51b, support bar 52 and hanging hook assembly thereof, the described first bracing frame 51a, the second bracing frame 51b is separately positioned on the first gripper shoe 10a and link soffit place, the second gripper shoe 10b, two outside, described support bar 52 is connected between the first bracing frame 51a and the second bracing frame 51b of both sides, the described first bracing frame 51a and the second bracing frame 51b are by on screw 53 pivot joints and the above-mentioned support bar 52, win gripper shoe 10a and the second gripper shoe 10b can be rotated around above-mentioned screw 53, above-mentioned support bar 52 makes the tightr and difficult distortion of win bracing frame 51a and second bracing frame 51b pivot joint, the described first gripper shoe 10a side has groove 12, the described second gripper shoe 10b side has the raised line 13 with the groove 12 corresponding fastenings of the first gripper shoe 10a, described hanging hook assembly is used for the connection of the further firm above-mentioned first gripper shoe 10a and the second gripper shoe 10b, described hanging hook assembly comprises hook 54 and annular shell fragment 55, described hook 54 is by connector 56 rotating being connected on the second gripper shoe 10b, described hook 54 has hook groove 540, the junction of the first gripper shoe 10a and the second gripper shoe 10b is sticked in the above-mentioned hook groove 540, described annular shell fragment 55 1 ends embed in the second gripper shoe 10b, the other end presses on the described hook 54, the centre is installed on the connector 56, when above-mentioned hook 54 is not subjected to external force, the hook groove 540 of described hook 54 is stuck in the junction of the above-mentioned first gripper shoe 10a and the second gripper shoe 10b, make the gripper shoe 10a that wins be connected tightr with the second gripper shoe 10b, when needs are folding when folding the first gripper shoe 10a and the second gripper shoe 10b, at first need firmly hook 54 to be turned to dotted line position, hook groove 540 just breaks away from the junction of the first gripper shoe 10a and the second gripper shoe 10b at this moment, just can carry out next step the folding task of folding the first gripper shoe 10a and the second support plate 10b, described hanging hook assembly makes the gripper shoe 10a that wins tightr with second gripper shoe 10b contact, and increased it and born the ability of gravity, the surface of the described gripper shoe of being made up of the first gripper shoe 10a and the second gripper shoe 10b has non-slip groove 11, be used to increase human body and ride, ensure the safety of construction in last stability.

The preferably, the described first gripper shoe 10a and the second gripper shoe 10b all have draw-in groove 14, described gripper shoe junction plate 41 is stuck in the described first gripper shoe 10a and the second gripper shoe 10b draw-in groove 14, make like this and can be well gripper shoe junction plate 41 and the first gripper shoe 10a and the second gripper shoe 10b be coupled together without other connector, both convenient disassembly had also been saved manpower and financial resources.

In conjunction with Fig. 1 a, Fig. 1 b, Fig. 2, Fig. 7 b, Fig. 8 a, Fig. 8 b, Fig. 8 c and Fig. 8 d, the operating principle of the utility model bridge ladder is done a detailed explanation, when the utility model bridge ladder launches, as Fig. 1 a, shown in Fig. 1 b and Fig. 7 c, this moment, the raised line 13 of the second gripper shoe 10b side was fastened in the groove 12 of the first gripper shoe 10a side, the junction of the first gripper shoe 10a and the second gripper shoe 10b is sticked in the hook groove 540 of hook 54, the terraced leg 20 of bridge ladder both sides is connected with the first gripper shoe 10a and the second gripper shoe 10b by rotating control assembly 40 respectively, described by

sleeve pipe

21,22,23 terraced leg 20 full extension of being formed also interfix by Elastip pin 201, the pedal 20 that is connected with locking device 60 stretches in the pin shaft hole 200 of terraced leg by the 3rd bearing pin 62 in the locking device 60, pedal 30 is fixed on the terraced leg 20, thereby whole bridge ladder presents the state that launches and fix; When needs are folding when folding, need to being connected of terraced leg 20 and the first gripper shoe 10a, the second gripper shoe 10b, pedal 30 and terraced leg 20 be connected and the first gripper shoe 10a folds with being connected of the second gripper shoe 10b and folds, firmly push the button 44a in the rotating control assembly 40, make the latch right-hand member 440b of above-mentioned latch 44b withdraw from pin hole 411a on the gripper shoe junction plate 41, the inserted sheet 24 of so terraced leg 20 can rotate around pin 421c, thereby realizes folding folding being connected of terraced leg 20 and the gripper shoe of being made up of the first gripper shoe 10a and the second gripper shoe 10b; When needs are folding when folding pedal 30 with terraced leg 20, the push button 651 that need enforce push button 65 moves toward the direction away from pin shaft hole 200, the moving of push button 651 will drive mobile with a push rod 650 that is connected, moving of above-mentioned push rod 650 will drive moving of connected the 3rd bearing pin 62, thereby compress connected the 3rd spring 63, meanwhile again with

sleeve pipe

21,22,23 contractions get final product, as the areole 62a of annular sheath body 61 during not over against pin shaft hole 200, the 3rd spring 63 is compressed, this moment, the 3rd bearing pin 62 was and

sleeve pipe

21,22,23 tube wall contacts, thereby realizes folding folding being connected of pedal 30 and terraced leg 20; When needs are folding when folding being connected of the first gripper shoe 10a and the second gripper shoe 10b, only need to exert oneself earlier rotational hook 54 to dotted line position, make the junction of the first gripper shoe 10a and the second gripper shoe 10b break away from hook groove 540, the direction of firmly pulling past terraced leg 20 places of the first gripper shoe 10a and the second gripper shoe 10b again moves and gets final product; Be the utility model bridge ladder as Fig. 8 a, Fig. 8 b, Fig. 8 c and Fig. 8 d and fold schematic diagram after folding.

Connected mode between sleeve pipe quantity, sleeve pipe and the sleeve pipe of the composition ladder leg 20 that the utility model bridge ladder is related, select the quantity of pedal 30 and all decide according to actual conditions according to the pedal that locking device 60 is selected to be fit to install in the position on the ladder leg 20 of pedal 30 places according to the length of sleeve pipe, be well known to those of ordinary skill in the art, no longer be described in detail at this.

Above disclosed only is preferred embodiment of the present utility model, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.

Claims

1. collapsible bridge ladder, comprise gripper shoe, the gripper shoe junction plate, ladder leg and pedal, described gripper shoe junction plate is fixed in the gripper shoe inboard, described terraced leg is connected in described gripper shoe junction plate by pin is rotatable, described pedal is connected between the adjacent terraced leg, it is characterized in that: described collapsible bridge ladder also comprises rotating control assembly, described rotating control assembly is through described gripper shoe, gripper shoe junction plate and terraced leg, comprise latching portion and manoeuvre portion, described latching portion is fixed in the terraced leg, and has a latch, described gripper shoe junction plate is to being provided with pin hole by latch, described latch inserts this pin hole movably and prevents the relative gripper shoe junction plate rotation of terraced leg, described manoeuvre portion is passed gripper shoe and is fixed in the gripper shoe junction plate, described manoeuvre portion has button, described button one end exposes gripper shoe, the other end stretches to described pin hole, described button stretches into described pin hole when being subjected to pushing and ejects described latch, makes latch disengaging gripper shoe junction plate and makes the gripper shoe junction plate rotation relatively of terraced leg.

2. collapsible bridge ladder as claimed in claim 1, it is characterized in that: described manoeuvre portion also has first fixture and first spring, described first fixture is fixed in the described gripper shoe junction plate, the end that described button stretches to pin hole is contained in first fixture, described first spring housing stretches on the end of pin hole at described button, and an end is replaced button, and the other end is replaced gripper shoe junction plate inwall.

3. collapsible bridge ladder as claimed in claim 1, it is characterized in that: described latching portion also comprises second fixture, second spring and second fixing button, described first fixture is fixed in the terraced leg, the relative other end of one end of the insertion pin hole of described latch is contained in second fixture, described second fixing button is installed in the second fixture end, described second spring, one end is replaced latch, and the other end is replaced second fixing button.

4. collapsible bridge ladder as claimed in claim 1 is characterized in that: described gripper shoe comprises first gripper shoe and second gripper shoe, and described first gripper shoe and second gripper shoe flexibly connect.

5. collapsible bridge ladder as claimed in claim 4, it is characterized in that: described first gripper shoe and second gripper shoe flexibly connect by linkage, described linkage comprises first bracing frame and second bracing frame, described first bracing frame, second bracing frame are separately positioned on first gripper shoe and link soffit place, second gripper shoe, two outside, and described first bracing frame and second bracing frame articulate.

6. collapsible bridge ladder as claimed in claim 5, it is characterized in that: described linkage also comprises support bar, described support bar is connected between first bracing frame and second bracing frame of both sides.

7. collapsible bridge ladder as claimed in claim 4 is characterized in that: described first gripper shoe and second gripper shoe all have draw-in groove, and described gripper shoe junction plate is stuck in the described draw-in groove.

8. collapsible bridge ladder as claimed in claim 4 is characterized in that: the described first gripper shoe side has groove, and the described second gripper shoe side has and the corresponding raised line of the groove of first gripper shoe, and described raised line is fastened in the described groove.

9. collapsible bridge ladder as claimed in claim 4, it is characterized in that: described linkage also comprises hanging hook assembly, described hanging hook assembly comprises hook and annular shell fragment, described hook is rotating to be connected on second gripper shoe, described annular shell fragment one end embeds in second gripper shoe, the other end presses on the described hook, and described hook has the hook groove, and the junction of described first gripper shoe and described second gripper shoe is sticked in the described hook groove.

10. collapsible bridge ladder as claimed in claim 1 is characterized in that: sleeve pipe that described terraced leg is scalable transform length is formed, and described pedal two ends have locking device, and described locking device is installed on the sleeve pipe and fixed pedestal.

11. collapsible bridge ladder as claimed in claim 10, it is characterized in that: described locking device comprises annular sheath body and ccontaining its interior bearing pin, the 3rd spring, spring load spare and push button, described annular sheath body one end is placed on the sleeve pipe, the other end inserts pedal, described bearing pin penetrates in the annular sheath body, described the 3rd spring one end is resisted against described bearing pin, the other end is placed in the described spring load plate, described spring load plate is fixed in the annular sheath body, described push button one end fastens described bearing pin middle part, the other end stretches out described annular sheath body and pedal, described sleeve pipe has and the corresponding pin shaft hole of described bearing pin, described bearing pin one end is resisted against described the 3rd spring, and the other end passes annular sheath body movably and inserts pin shaft hole.