CN101654999B - Portable folding ladder - Google Patents
Portable folding ladder Download PDFInfo
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- CN101654999B CN101654999B CN2008101203510A CN200810120351A CN101654999B CN 101654999 B CN101654999 B CN 101654999B CN 2008101203510 A CN2008101203510 A CN 2008101203510A CN 200810120351 A CN200810120351 A CN 200810120351A CN 101654999 B CN101654999 B CN 101654999B
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- montant
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- pedal unit
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Abstract
The invention discloses a portable folding ladder, which comprises vertical rods and a plurality of pedal units arranged transversely, wherein the plurality of pedal units are arranged at intervals along the height direction of the vertical rods. The portable folding ladder is characterized in that: four folding vertical rods are arranged between each pair of adjacent upper and lower pedal units independently; two ends of each of the four vertical rods are rotatably arranged at four corners of each pedal unit; and the vertical rods comprise a first vertical rod, a second vertical rod and a folding locking mechanism arranged between the first vertical rod and the second vertical rod. Compared with the prior art, the portable folding ladder has the advantages of great simplification of inside arrangement and convenient unfolding and folding operations by adopting a structural mode of folding middle parts of the vertical rods.
Description
Technical field
The present invention relates to a kind of portable folding ladder.
Background technology
Common ladder no matter be double ladder or yi shaped ladder, generally all comprises the pedal unit of montant and a plurality of horizontally sets, and a plurality of pedal unit are provided with at interval along this montant short transverse, and montant is used for the sustain pedal unit, is located at the pedal unit both sides.For ease of storing, transporting and move, often be designed to the foldable structure.As the patent No. is Chinese utility model patent " collapsible the double ladder " (notice of authorization number: CN2612790Y) of ZL03239182.X, and for example application number is 86101587 Chinese invention patent application " folding ladder ", and the patent No. is Chinese utility model patent " the folding ladder hinge arrangement with spanner " (notice of authorization number: CN2864063Y) or the like of ZL200520123122.6 for another example.
But present seen folding ladder, folding all is to realize rotating the telescopic folding design in the junction of montant and pedal unit, as the patent No. be: the Chinese utility model patent " folding ladder " of ZL01230008.X (notice of authorization number: CN2489087Y), this patent is by montant, cross bar, articulated elements, night bolt and foot of ladder are formed, it is characterized in that, adjacent cross bar and montant clamping connection place are provided with articulated elements, make cross bar can do relative rotation with montant, montant is divided into montant and following montant, last montant and following montant connection place are provided with articulated elements, make between montant and the following montant and do rotation relatively towards the outside, the inboard is provided with the locking device of night bolt between last montant and the following montant.This patent and similar structures ubiquity complex structure thereof, loaded down with trivial details, the deficiencies such as magnification is little, steadiness difference of higher, the folding stretching, extension of processing cost.
Summary of the invention
Technical problem to be solved by this invention is that a kind of folding convenient, magnification is big, steadiness is good portable folding ladder are provided at the above-mentioned state of the art.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of portable folding ladder, the pedal unit that comprises montant and a plurality of horizontally sets, a plurality of pedal unit are provided with at interval along this montant short transverse, it is characterized in that being provided with independently between every pair of neighbouring pedal unit four folding montants, four montants equal rotary type in two ends up and down are arranged on four corners of each pedal unit, described montant comprise first montant, second montant and be located at this first montant head and the second montant head between fold locking mechanisms.
Wherein fold locking mechanisms is preferably as follows three kinds of schematic designs:
Scheme one: the described first montant head and the second montant head are rotatably connected, the described second montant head has the hook groove, described fold locking mechanisms comprises hook spare and the return unit that is connected with aforementioned hook groove, the corresponding aforesaid hook groove of this hook spare is arranged at the described first montant head rotationally, this return unit is located on first montant and is forced hook spare to be snapped in the aforesaid hook groove, push aforementioned hook spare, overcome aforementioned return unit active force, hook spare breaks away from the hook groove, and first montant and second montant are rotatable and folding.
Described return unit is a torsion spring of being located at hook spare inboard.Certainly, described return unit is the back-moving spring of being located between the hook spare rearward end and first montant.
Scheme two: described first montant is provided with a ball race near head, and described fold locking mechanisms comprises
Sleeve is sheathed on the described first montant head and the second montant head outer wall slidably, and inwall has the cavity of corresponding aforementioned ball race;
Connecting piece is located in the aforementioned sleeve, and two ends are connected with the second montant head rotation formula with the described first montant head respectively;
Hoodle is located between aforementioned sleeve cavity and the aforementioned ball race and is made this sleeve be limited in the described first montant head and the second montant head outer wall; And
The compression spring, an end and aforementioned sleeve cavity bottom offset, and the other end then offsets with aforesaid hoodle,
Aforementioned sleeve is under the sliding mode, and this hoodle overcomes the elastic force of compression spring and breaks away from ball race, and the relative aforementioned connecting piece with second montant of described first montant is rotatable folding.
Scheme three: the described first montant head is extended with first lug and second lug, the described second montant head is arranged at the gap between first lug and second lug and forms the rotary type connection, described first lug has pilot hole, one pushes away to turn round and stretches in the aforementioned pilot hole, and this pushes away the bottom of turning round and has the card division that is clasped with the described second montant head, inwall between aforementioned first lug and second lug and aforementioned pushing away also are provided with a return springs between the top of turning round
Aforementioned push away to turn round to be in be subjected under the external force effect, push away to turn round and overcome return springs elastic force, and remove buckle, thereby described first montant and second montant are rotatable folding with the described second montant head.As pushing away the decision design of turning round: described push away to turn round comprise in force section outside the described pilot hole and the slide section between described first lug and second lug, this force section is connected by screw with slide section, and described push away turn round the card division be positioned at this slide section bottom.
Described each pedal unit both sides rotary type respectively are provided with one and are used to the tie-beam strengthening supporting, and this tie-beam is connected between two montant upper and lower sides of homonymy obliquely.Strengthen supporting role.
Also be provided with the herringbone bracing piece between two neighbouring pedal unit, these bracing piece two legs are located on two corners of below pedal unit rearward end rotationally, the summit then is supported in pedal unit leading section middle part, top, make further being difficult between two pedal unit rock, guarantee the balance of human body.
Described pedal unit is rectangular substantially, both sides have fixed bar, leading section has for foot-operated tread portion, rearward end hollow, a herringbone connecting rod is located at hollow position, and these connecting rod two legs are provided with on two corners of pedal unit rearward end, the summit then is connected in the middle part of aforementioned tread portion, this kind design, pedal unit is lighter, and fastness is unaffected.
Compared with prior art, the invention has the advantages that: adopt the folding frame mode in montant middle part, novel in design, be skillfully constructed, the internal construction setting is simplified greatly, stretching, extension and folding operation are convenient, and magnification (ratio of ladder height after folding and stretching, extension back ladder height) maximum can reach 1:10; Fold locking mechanisms can adopt multiple mode to design, and processing cost is lower, and adopts modes such as tie-beam, bracing piece that the folding ladder resistance to overturning is strengthened, and has guaranteed user's safety, can be widely used in various occasions.
Description of drawings
Fig. 1 is embodiment 1 a user mode reference diagram.
Fig. 2 is embodiment 1 stereoscopic-state schematic diagram when folding.
Fig. 3 is an embodiment side structure schematic diagram.
Fig. 4 is embodiment 2 structural representations.
Fig. 5 is embodiment 3 partially folded structural representations.
Fig. 6 is embodiment 3 structural representation when folding.
Fig. 7 is an A portion enlarged drawing among Fig. 5.
Fig. 8 is a B portion enlarged drawing among Fig. 6.
Fig. 9 is embodiment 4 partially folded structural representations.
Figure 10 is embodiment 4 structural representation when folding.
Figure 11 is embodiment 4 sectional perspective structural representations.
Figure 12 is embodiment 4 exploded assembly drawings.
Figure 13 is the first montant head phantom among the embodiment 4.
Figure 14 is the sectional view of embodiment 4 user modes.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Embodiment 1: with reference to figure 1, Fig. 2 and shown in Figure 3, portable folding ladder in the present embodiment comprises the pedal unit 1 of montant 100 and a plurality of horizontally sets, a plurality of pedal unit 1 are provided with at interval along these montant 100 short transverses, pedal unit 1 is rectangular substantially, both sides have fixed bar 11, leading section has for foot-operated tread portion 12, rearward end hollow, one herringbone connecting rod 13 is located at hollow position, these connecting rod 13 2 legs are located on two corners of pedal unit 1 rearward end rotationally, and the summit then plays a supportive role and is connected in the middle part of tread portion 12.Also be provided with herringbone bracing piece 6 between two neighbouring pedal unit 1, these bracing piece 6 two legs are positioned on two corners of below pedal unit 1 rearward end, and the summit then is supported in pedal unit 1 leading section middle part, top.Each pedal unit 1 both sides rotary type respectively are provided with one and are used to the tie-beam 8 strengthening supporting, and tie-beam 8 is connected between two montant 100 upper and lower sides of homonymy obliquely.Be provided with independently between every pair of neighbouring pedal unit 1 100, four montants of four folding montants about in the of 100 the equal rotary type in two ends be arranged on four corners of each pedal unit 1.
Montant 100 comprise first montant 3, second montant 4 and be located at these first montant, 3 heads and second montant, 4 heads between fold locking mechanisms 5, the first montants 3 be positioned at second montant, 4 tops.
First montant, 3 heads and second montant, 4 heads are rotatably connected by a bearing pin 53, second montant, 4 heads have hook groove 41 (seeing shown in Figure 3), fold locking mechanisms 5 comprises hook spare 51 and the back-moving spring 52 that is connected with hook groove 41, this hook spare 51 corresponding hook grooves 42 are arranged at first montant, 3 heads rotationally, this back-moving spring 52 serves as return unit and is located between first montant 3 and hook spare 51 inboards, force hook spare 51 to be snapped in the hook groove 41, press pressure hook spare 51 rearward end, overcome the active force of back-moving spring 52, hook spare 51 breaks away from hook groove 41, the first montants 3 and second montant 4 is rotatable and folding.
Embodiment 2: with reference to shown in Figure 4, and the portable folding ladder in the present embodiment, with the back-moving spring 52 that torsion spring 53 replaces among the embodiment 1, this torsion spring 53 is located between hook spare 7 inboards and first montant 3, and other structures are identical with embodiment 1.
Embodiment 3: with reference to figure 5, Fig. 6, Fig. 7 and shown in Figure 8, first montant 3 in the portable folding ladder in the present embodiment is provided with a ball race 42 near head, and fold locking mechanisms 5 comprises sleeve 54, connecting piece 57, hoodle 56 and compression spring 55.
Sleeve 54 is sheathed on first montant, 3 heads and second montant, 4 head outer walls slidably, and inwall has the cavity 541 of corresponding ball race 42; Connect 57 and be located in the sleeve 54, two ends are connected with second montant, 4 head rotation formulas with first montant, 3 heads respectively;
Hoodle 56 is located between sleeve cavity 541 and the ball race 42 and is made this sleeve 541 be limited in 3 ones on first montant head and second montant, 4 head outer walls; Compression spring 55 1 ends and sleeve cavity 541 bottoms offset, the other end then offsets with hoodle 56, sleeve 54 is under the sliding mode, and this hoodle 56 overcomes the elastic force of compression spring 55 and breaks away from ball race 42, such first montant 3 and second montant, 4 relative connecting piece 57 rotatable folding.
Embodiment 4: with reference to figure 9 to shown in Figure 14, first montant, 3 heads are extended with first lug 32 and second lug 34 in the portable folding ladder in the present embodiment, second montant, 4 heads form the rotary type connection by the gap that minor axis 51e is arranged between first lug 32 and second lug 34, first lug 32 has pilot hole 31, one pushes away and turns round 51a and stretch in the pilot hole 31, push away and turn round 51a and comprise at force section 51b outside the pilot hole 31 and the slide section 51c between first lug and second lug, this force section 51b is connected by two screw 51f with slide section 51c, and this slide section 51c bottom has card division 51d.Inwall between first lug 32 and second lug 34 and the top of slide section 51c also have a return springs 7, and this return springs 7 adopts spring.
Push away and turn round 51a and be in and be subjected under the external force effect, push away and turn round 51a and overcome return springs 7 elastic force, remove buckles with the screens 43 of second montant, 4 heads, thereby first montant 3 and second montant 4 are rotatable folding.
Claims (10)
1. portable folding ladder, the pedal unit that comprises montant and a plurality of horizontally sets, a plurality of pedal unit are provided with at interval along this montant short transverse, it is characterized in that being provided with independently between every pair of neighbouring pedal unit four folding montants, the equal rotary type in two ends is arranged on four corners of each pedal unit about four montants, and, aforesaid montant comprise first montant, second montant and be located at this first montant head and the second montant head between fold locking mechanisms.
2. portable folding ladder according to claim 1, it is characterized in that the described first montant head and the second montant head are rotatably connected, the described second montant head has the hook groove, described fold locking mechanisms comprises hook spare and the return unit that is connected with aforementioned hook groove, the corresponding aforesaid hook groove of this hook spare is arranged at the described first montant head rotationally, this return unit is located on first montant and is forced hook spare to be snapped in the aforesaid hook groove, push aforementioned hook spare, overcome aforementioned return unit active force, hook spare breaks away from the hook groove, and first montant and second montant are rotatable and folding.
3. portable folding ladder according to claim 2 is characterized in that described return unit is a torsion spring of being located at hook spare inboard.
4. portable folding ladder according to claim 2 is characterized in that described return unit is the back-moving spring of being located between the hook spare rearward end and first montant.
5. portable folding ladder according to claim 1 is characterized in that described first montant is provided with a ball race near head, and described fold locking mechanisms comprises
Sleeve is sheathed on the described first montant head and the second montant head outer wall slidably, and inwall has the cavity of corresponding aforementioned ball race;
Connecting piece is located in the aforementioned sleeve, and two ends are connected with the second montant head rotation formula with the described first montant head respectively;
Hoodle is located between aforementioned sleeve cavity and the aforementioned ball race and is made this sleeve be limited in the described first montant head and the second montant head outer wall; And
The compression spring, an end and aforementioned sleeve cavity bottom offset, and the other end then offsets with aforesaid hoodle,
Aforementioned sleeve is under the sliding mode, and this hoodle overcomes the elastic force of compression spring and breaks away from ball race, and the relative aforementioned connecting piece with second montant of described first montant is rotatable folding.
6. portable folding ladder according to claim 1; It is characterized in that the described first montant head is extended with first lug and second lug; The described second montant head is arranged at the gap between first lug and second lug and forms the rotary type connection; Described first lug has pilot hole; One pushes away to turn round and stretches in the aforementioned pilot hole; And this pushes away the bottom of turning round and has the card division that is clasped with the described second montant head; Inwall between aforementioned first lug and second lug and aforementioned pushing away also are provided with a return springs between the top of turning round
Aforementioned push away to turn round to be in be subjected under the external force effect, push away to turn round and overcome return springs elastic force, and remove buckle, thereby described first montant and second montant are rotatable folding with the described second montant head.
7. portable folding ladder according to claim 6, it is characterized in that described push away to turn round comprise in force section outside the described pilot hole and the slide section between described first lug and second lug, this force section is connected by screw with slide section, and described push away turn round the card division be positioned at this slide section bottom.
8. according to the arbitrary described portable folding ladder of claim 1 to 7, it is characterized in that described each pedal unit both sides respectively rotary type be provided with one and be used to the tie-beam strengthening supporting, this tie-beam is connected between two montant upper and lower sides of homonymy obliquely.
9. according to the arbitrary described portable folding ladder of claim 1 to 7, it is characterized in that also being provided with the herringbone bracing piece between two neighbouring pedal unit, these bracing piece two legs are located on two corners of below pedal unit rearward end rotationally, and the summit then is supported in pedal unit leading section middle part, top.
10. according to the arbitrary described portable folding ladder of claim 1 to 7, it is characterized in that described pedal unit is rectangular substantially, both sides have fixed bar, leading section has for foot-operated tread portion, rearward end hollow, one herringbone connecting rod is located at hollow position, and these connecting rod two legs are located on two corners of pedal unit rearward end, and the summit then is connected in the middle part of aforementioned tread portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101203510A CN101654999B (en) | 2008-08-22 | 2008-08-22 | Portable folding ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101203510A CN101654999B (en) | 2008-08-22 | 2008-08-22 | Portable folding ladder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101654999A CN101654999A (en) | 2010-02-24 |
| CN101654999B true CN101654999B (en) | 2011-07-20 |
Family
ID=41709432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101203510A Expired - Fee Related CN101654999B (en) | 2008-08-22 | 2008-08-22 | Portable folding ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101654999B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB151487A (en) * | 1919-10-14 | 1920-09-30 | William Andrew Sydne Hall | Step ladder |
| CN2159448Y (en) * | 1993-05-05 | 1994-03-23 | 林进财 | Folding bar-lilce ladder with slipnot locking device |
| CN2250413Y (en) * | 1996-03-11 | 1997-03-26 | 万俊文 | Two-purpose foldable ladder |
| DE10035007A1 (en) * | 2000-07-19 | 2002-01-31 | Klaus Halamay | Folding two step device, used for entering caravan or motor home, comprises two rotatable stand frames with steps rotatably mounted in front stand frame |
| CN2489087Y (en) * | 2001-07-02 | 2002-05-01 | 黄德雄 | Folding ladder |
| CN201265351Y (en) * | 2008-08-22 | 2009-07-01 | 陆海章 | Portable folding ladder |
-
2008
- 2008-08-22 CN CN2008101203510A patent/CN101654999B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB151487A (en) * | 1919-10-14 | 1920-09-30 | William Andrew Sydne Hall | Step ladder |
| CN2159448Y (en) * | 1993-05-05 | 1994-03-23 | 林进财 | Folding bar-lilce ladder with slipnot locking device |
| CN2250413Y (en) * | 1996-03-11 | 1997-03-26 | 万俊文 | Two-purpose foldable ladder |
| DE10035007A1 (en) * | 2000-07-19 | 2002-01-31 | Klaus Halamay | Folding two step device, used for entering caravan or motor home, comprises two rotatable stand frames with steps rotatably mounted in front stand frame |
| CN2489087Y (en) * | 2001-07-02 | 2002-05-01 | 黄德雄 | Folding ladder |
| CN201265351Y (en) * | 2008-08-22 | 2009-07-01 | 陆海章 | Portable folding ladder |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2006-299800A 2006.11.02 |
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| Publication number | Publication date |
|---|---|
| CN101654999A (en) | 2010-02-24 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110720 Termination date: 20120822 |