• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a ladder comprising jamming cleats 5, a guying rope 4 and bars B whose upper face has longitudinal grooves 20. The object of the invention is to provide means for jamming the rope of Guying reducing the consequences of their fixation on the amounts of the ladder. To this end, each upright M carries a single locking tab 5 rotatably mounted on a cylindrical bearing 10 forming part of a monolithic fastener 11, and this part 11 is positioned on the upright M so that the notches 5a of the cleat are opposite the splines 20 of a bar B1, said part 11 having means 14 for angular positioning on the bar, a plate 12 for fixing the upright by a single connecting means, and ribs 17 of stiffening of the bearing-platinum bond.
    公开号:FR3026427A1
    申请号:FR1459318
    申请日:2014-09-30
    公开日:2016-04-01
    发明作者:Yves Bugy；Christophe Meric
    申请人:AUDINNOV；
    IPC主号:
    专利说明:

    [0001] The invention relates to a cleat for wedge-resistant ladder. For working at height, for example on low-voltage power lines or telephone lines carried by poles, it is known to use ladders resting on the post 1, as shown in FIG. 1, or located near the pole. post, but leaning on support legs. The ladder comprises a fixed plane 2 formed by assembling uprights M with bars B. To secure the ladder when it bears against the post 1, it has a guying rope 4 which is stretched between the uprights of the plane fixed 2 and the pole 1, to form a rigid assembly, insensitive to load variations and the tilting torque generated by the movement of the person on the ladder, at its summit or on its platform summit. In other applications, for example with a ladder with support legs, the guying rope is stretched between the ladder and a fixed attachment point. The guy rope of the ladder is wedged on the uprights by cleats 5 which are attached and fixed by screws against the inner faces of the two uprights of the fixed plane 2. Usually, each cleat is composed of a bearing plate two transverse axes on each of which are rotatably mounted two ovoidally shaped cleats resiliently biased against each other. These cleats are arranged on either side of the clamping plane of the guying rope. The curved face of each cleat, which is turned towards the other cleat, is provided with notched transverse ridges adapted to oppose the movements of the guying rope 4. The cleat bearing platen is fixed by screws on the inner wall of each of the amounts M of the fixed plane 2. Although satisfactory, such cleats have two disadvantages. The first is that they require to drill two holes in each amount, with the result of weakening locally this amount. The other disadvantage results from their structure and their positioning which, under exaggerated tensile forces of the rope on them, amplify the tilting torque on the catches which tends toward their tearing off the plate. Although the risk of tearing is very low, its existence is enough to generate a feeling of insecurity on the user of the scale. The object of the invention is to overcome these disadvantages by providing means for jamming the guying rope reducing the number of holes to fix it on the amount of the ladder and increasing its resistance to tearing. It relates more particularly to ladders in which, as described in the document FR1360240 in the name of the applicant, the cross section of the central portion of the bar is triangular in shape and has, projecting from its upper face longitudinal grooves for the support of the user's foot. According to the invention, each upright M of the fixed plane carries a single cam cleat rotatably mounted on a cylindrical bearing forming part of a monolithic piece which is positioned on the upright M so that the notches of the cleat are facing each other. splines of a bar B1, said part comprising means for angular positioning on the bar, a mounting plate on the upright by a single connecting means and stiffening ribs of the bearing-platinum connection.
    [0002] The monolithic piece is placed around the bar when mounting it on the uprights, while the final fixing of its plate on the upright is provided by the single connecting means, such as screw, rivet. In one embodiment, the monolithic piece comprises, below the bearing for the cleat, a tubular liner having the same shape as the bar which it surrounds without play. This liner positions the workpiece and the cleat and, especially , improves the resistance to tearing torque. Other features and advantages will become apparent from the description which follows, with reference to the attached schematic drawing, showing an embodiment of the invention. Figure 1 is a perspective view of a state-of-the-art scale; Figure 2 is partial perspective view showing on an enlarged scale an embodiment of the cleat according to the invention when it is in the jamming position; Figure 3 is a perspective view of the monolithic piece alone; Figure 4 is a perspective view of the cleat when in the waiting position of a rope; FIGS. 5, 6 and 7 are side views in elevation of a dog when it is, respectively, in the waiting position, in the jamming position of a rope and in the manual release position of a dog. rope. In the embodiment shown in FIGS. 2 to 7, at each point of the fixed plane 2 of the scale is associated a single latch 5 which is rotatably mounted on a bearing 10 forming part of a fastener 11 , monolithic and molded metal. As can be seen in FIG. 3, the bearing 10 projects towards the inside of the ladder from a plate 12. This comprises, at its upper end, a hole 13 for the passage a fixing means, such as a rivet or screw, and at its lower end, a tubular liner 14 which, adapted to surround one of the transverse bars B with a reduced clearance, has in this embodiment a rounded triangular section. Thus, the liner 14 is angularly positioned by the bar and strengthens the monolithic piece 11. The wall 14a of the liner, which is turned towards the post 1, is extended upwards by a rib 15 reinforcing the piece by forming a gusset . FIG. 3 shows that the rib 15 is traversed by a hole 16 for the passage of the guying rope 4. Finally, the body of the bearing 10 is connected to the plate 12 by radial ribs 17 giving it a very good resistance In known manner, the cleat 5 comprises an axial bore, not shown, by which it is rotatably mounted on the bearing 10. It contains elastic return means, such as a spiral spring, orienting its curved face notch 5a in the direction of the underlying grooves 20 of the bar B. 25 The two fasteners 11 are placed on the uprights M of the fixed plane 2, when the common bar B1 which carries them is itself fixed by its ends on the amounts M. The bars are fixed either by swaging on the uprights or by an axial screw bearing on the upright, while that of the parts 11 on the same amounts is made by 30 single rivet 18 passing to through hole 13 of each plate 12. Figures 2 and 6 show that when the latch 5 is in the jamming position, its notched face 5a cooperates with the splines 20 of the bar B1 to grip the rope 4 which passes between them.
    [0003] In this position, the catches 5 are self-locking vis-à-vis the rope 4 and easily absorb the tensile forces that are communicated to them in the direction of the arrow 21 of Figure 2. The stiffness given to the parts 11 by the shirt 14 , the gusset rib 15 and the ribs 17, allows these parts to withstand the pulling forces exerted on the tubular uprights M which carry them, especially since these amounts are not weakened by the fixings of the plates 12 of the piece 11. When there is no rope 4, the elastic return means hold the stopper in the waiting position shown in FIGS. 4 and 5, in which position the notches 5a of the cleat do not come in contact with the splines 20, and an interval S is formed between cleat and bar. To release the rope 4 and allow the ladder to take off from its support on the post 1 before its folding for transport, the operator must exert on each of the two strands of the rope 4 a traction in the direction of the arrow 22 15 in Figure 7. As shown in Figure 6 this has the effect of moving the tabs 5 of the rope 4 and allow to let it spin in the opposite direction of the arrow 22. It follows from the foregoing description that the The stopper according to the invention facilitates its installation and positioning on the uprights, and has a tear resistance much higher than that of existing cleats, while improving the safety of the user.
    权利要求:
    Claims (5)
    [0001]
    CLAIMS1.) Cleat for wedge-resistant ladder, said ladder comprising, on the one hand, a fixed plane (2) of which at least one of the uprights is equipped with a cam cleat (5) with spring return, suitable for immobilize a strand 5 of a guying rope (4), and, secondly, tubular bars B having, projecting from their upper face, longitudinal grooves (20) for the support of the foot of the user, characterized in that each upright M of the fixed plane (2) carries a single cam cleat (5) rotatably mounted on a cylindrical bearing (10) forming part of a monolithic fastener (11), and this piece (11) is positioned on the upright M so that the notches (5a) of the cleat are opposite the grooves (20) of a bar B1, said piece (11) comprising means (14) of angular positioning on the bar, a plate (12) for fixing to the upright by a single connecting means and ribs for stiffening the bar platinum-platinum. 15
    [0002]
    2.) cam cleat for pole-mounted ladder according to claim 1 characterized in that the monolithic piece (11) comprises, below the bearing (10) for the cleat (5), a tubular liner (14) having the same shape as the bar B1 which it surrounds without play and with which it cooperates to ensure its positioning. 20
    [0003]
    3.) Cleat for pole-mounted ladder according to claims 1 and 2 taken together characterized in that, the wall of the liner (14) which is turned towards the support post is extended by a reinforcing rib ( 15) forming gusset with the plate (12)
    [0004]
    4.) Cleat for pole-mountable ladder according to claim 3 characterized in that the reinforcing rib (15) is traversed by a hole (16) for the passage of the guying rope (4).
    [0005]
    5.) Cleat for pole-mountable ladder according to claim 1 characterized in that the body (10a) of the bearing (10) for the cleat (5) is connected to the mounting plate (12) by radial ribs ( 17). 30
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    同族专利:
    公开号 | 公开日
    EP3002407A1|2016-04-06|
    FR3026427B1|2017-07-14|
    ES2622997T3|2017-07-10|
    EP3002407B1|2017-03-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB2323117A|1997-03-11|1998-09-16|Terence James Webb|Apparatus for stabilising a ladder|
    FR2772421A1|1997-12-12|1999-06-18|France Telecom|Safety mechanism for ladder|
    US20100326768A1|2009-06-26|2010-12-30|Verizon Patent And Licensing Inc.|Fall-arrest ladder system|CN106786316A|2016-12-13|2017-05-31|国网河南省电力公司洛阳供电公司|A kind of self-locking can climb type cable channel cover plate|FR1360240A|1963-03-23|1964-05-08|App Thermoflex Etablissements|High sensitivity electromagnetic relay|US10138681B2|2016-08-16|2018-11-27|John Crawford|Ladder tie off system|
    WO2020181328A1|2019-03-13|2020-09-17|Safe N Strong Pty Ltd|System for securing an upright ladder|
    US11041341B1|2019-05-14|2021-06-22|Ron Harris|Ladder stabilizing system and method|
    法律状态:
    2015-09-04| PLFP| Fee payment|Year of fee payment: 2 |
    2016-04-01| PLSC| Search report ready|Effective date: 20160401 |
    2016-09-28| PLFP| Fee payment|Year of fee payment: 3 |
    2017-09-29| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1459318A|FR3026427B1|2014-09-30|2014-09-30|TAQUERT COINCEUR FOR HAUBANABLE LADDER|FR1459318A| FR3026427B1|2014-09-30|2014-09-30|TAQUERT COINCEUR FOR HAUBANABLE LADDER|
    ES15186497.2T| ES2622997T3|2014-09-30|2015-09-23|Ladder that can be anchored with at least one wedge block|
    EP15186497.2A| EP3002407B1|2014-09-30|2015-09-23|Braced ladder with at least a chock|
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