CN103104075A - Foldable stairs especially of 4 segments - Google Patents
Foldable stairs especially of 4 segments Download PDFInfo
- Publication number
- CN103104075A CN103104075A CN2012103774522A CN201210377452A CN103104075A CN 103104075 A CN103104075 A CN 103104075A CN 2012103774522 A CN2012103774522 A CN 2012103774522A CN 201210377452 A CN201210377452 A CN 201210377452A CN 103104075 A CN103104075 A CN 103104075A
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- section
- ladder
- hook portion
- articulated section
- articulated
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/04—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible
- E04F11/06—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic
- E04F11/062—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic folding
- E04F11/064—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic folding with stringers overlapping when folded
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Ladders (AREA)
- Handcart (AREA)
- Invalid Beds And Related Equipment (AREA)
Abstract
The stairs have a safety device ( 3 ) for protection against uncontrolled detachment of at least two last segments from the first segment ( 11 ) by rotation on the hinges ( 21 ), which mechanism is positioned near the top ends of the segments, beneficially overlaid on the extension hinge ( 23 ) that joins together segments 2 ( 12 ) and 3 ( 13 ). The safety device ( 3 ) is unlatched by the user lifting the bottom parts of segments 3 ( 13 ) and 4 ( 14 ). Also, the stairs have a bottom lock ( 6 ) installed on the hinge ( 22 ) that joins together segments 3 ( 13 ) and 4 ( 14 ).
Description
Technical field
The present invention relates to the collapsible scalariform ladder made by a plurality of hinge segment that are attached to ceiling and fall by expansion (especially 4 hinge segment).The present invention is mainly used in entering loft.The present invention also is applicable to the collapsible scalariform thing different from the scalariform ladder due to its angle of slope.
Background technology
Be attached to ceiling, be known design by the folding ladder of the segmented of launching to open, comprise 4 segmentation ladders downwards.Described ladder has hinged a plurality of sections, and first paragraph wherein is arranged on outer cover, and described outer cover sealing is from the ladder framework of bottom opening.Existing stepped design does not have safeguard measure for second segment and section not controlled disengaging from first paragraph afterwards; described not controlled disengaging meeting is in the situation that described ladder is fiercely opened (hard opening) occurs; cause described section resilience and move upward, and causing possibly the spontaneous not controlled deployment of described ladder.
Summary of the invention
The main design of technical solution of the present invention.Folding ladder of the present invention is designed to be arranged in ceiling, open downwards by launching, have following mechanism: this mechanism prevent by based on the back segment of at least two of articulated section rotations from the not controlled disengaging of first paragraph, described articulated section is positioned at the bottom of described section when described ladder is fallen and launched.This device has hook portion, described hook portion with comprise first paragraph and advantageously comprise together with the sub-component of outer cover, top section and a section in afterwards section are bonded together.In addition, described ladder has the framework that is arranged in ceiling, is used for storing the described ladder that is under folding and closed condition.Advantageously, described ladder has the opening that the bottom outer cover is used for sealing described framework.Be opened and fall together with the section of described outer cover and described ladder.
The first paragraph that is positioned in all sections tops when described ladder is unfolded is bonded together by articulated section and described framework, as long as between first paragraph and framework or at framework with keep having directly connection between the outer cover of first paragraph.For this purpose, term " sub-component that comprises first paragraph and advantageously comprise outer cover " means, according to stepped design, perhaps described first paragraph is fastened to the outer cover that uses the articulated section to engage with described framework, perhaps described first paragraph uses articulated section and the described framework wherein said outer cover that is bonded together to be attached to the bottom of described first paragraph, and perhaps described first paragraph use articulated section and described framework are bonded together but are not bonded together (described outer cover can be opened separately) with outer cover.Described section that is attached to outer cover is fastened to described outer cover by this way, namely make during the described ladder of operation, described section keeps fixing with respect to described outer cover, and this does not get rid of and has the structure member that makes it possible to reappose with respect to described outer cover (re-position) described section in assembling or maintenance period.In the design of " under the outer cover section of being suspended on ", outer cover can be fixedly connected with or be articulated and connected to the connection of section.
Continuous scalariform ladder section is bonded together by the articulated section, and described articulated section is positioned at the top of longeron (stringer) (or curb girder) of these sections or the section junction of bottom.Section 1 and section 2 are bonded together by the articulated section, and wherein rotation is positioned near the top surface of longeron of these two sections.When described ladder is unfolded, the apparent surface of the longeron of these continuous segments is adjacent to each other, described articulated section is alternatingly oriented on the top surface and basal surface of longeron in principle simultaneously, guarantees that one of these section are locked on another so that one section ladder of straight line and rigidity to be provided when being unfolded.
When described ladder was fallen and launched, the hook portion of safety device was positioned near the top of first paragraph, and when described ladder was unfolded, described hook portion was by user's release.Advantageously, the release in the following way of the hook portion of described safety device: the user promotes the section of end at least, rotates this section based on the articulated section that is in the top when described ladder is opened but launched simultaneously.Perhaps, described safety device can have the pull bar for the described hook portion of release, and described pull bar is independent of the lifting of described section and is operated by the user, advantageously uses to be in the bar of described section bottom when described ladder is opened but launched.
The present invention relates generally to the design that comprises four scalariform ladder sections, wherein several the 4th section (when described ladder is unfolded) is bonded together by following articulated section and the 3rd section from the top: the rotation of described articulated section is positioned at the bottom of the longeron of these two sections, and section 2 and section 3 are bonded together by following articulated section: the rotation of described articulated section departs from the bottom of the longeron of these two sections.With the articulated section of the rotation that departs from referred to as " extension articulated section ", the bias of rotation be described two sections longeron cross-sectional height at least half.Thus, when described ladder was folded, between the 4th section section of being positioned in 3 and section 2, section 2 leaned against on first paragraph.Of the present invention should design in, be used for protecting so as not to by based on the articulated sections rotation section 2 that section 1 and section 2 are bonded together and afterwards section from first paragraph not the hook portion of the described safety device of controlled disengaging be positioned near described extension articulated section.The release in the following way of the hook portion of described safety device: the user promotes coupled section 3 and section 4, rotates this two sections based on extending the articulated section simultaneously, and from the articulated section (being positioned at the bottom) of section 2 segregation sections 3 and section 4.
In the first design of the present invention, the hook portion of described safety device with as the locator effect of combining of a part that comprises first paragraph and advantageously comprise the sub-component of outer cover, the described hook portion section of being hinged to 2, and carry out release by the non-lock bolt pull bar that is hinged to---especially the 3rd section---of a section in described hook portion and section afterwards.The described locator of the effect of combining with the hook portion of described safety device is advantageously on the section of being positioned at 1.Described locator has the form from the stringer sides of this section to outstanding pin.After the bottom of---and the section possibly---, the non-lock bolt pull bar that engages with the 3rd section is removed described hook portion from the pin on the section of being arranged on 1 in user raising section 3, and with the connection release of described section.This makes it possible to based on the section of the articulated section rotation section 2 that section 1 and 2 is bonded together and back and launches described ladder for walking.
When hook portion folded when described ladder and described erecting device is locked, there is play between the latch surface of the locator on section 1 (pin) and described hook portion.The friction between parts is eliminated in this gap, and this is convenient to described hook portion is carried out release.In addition, the non-latch arm of described hook portion has inclined surface at the opposing face of latch surface, its with as the locator effect of combining of a part that comprises first paragraph and advantageously comprise the sub-component of outer cover, so that described hook portion is buckled into latched position.Non-lock bolt pull bar has longitudinal opening in its at least one end, so that be placed in the pin motion in the parts (being preferably the hook portion of described safety device) that act on that combine with described pull bar.As a result, at first the lifting of the bottom of described section closes the gap in the longitudinal opening of described non-lock bolt pull bar, and then pull bar is removed described hook portion from described pin, and with the connection release of described section.Therefore, the result of the action of having a mind to as the user, described hook portion is had lingeringly release, and this has eliminated in the situation that fiercely open the risk that not controlled release and section 2 and section resilience afterwards occur described ladder.
In four-part form ladder with the extension articulated section between section 2 and section 3, the hook portion of described safety device is hinged to the substrate of described extension articulated section, the described substrate section of being fastened to 2.Non-lock bolt pull bar is hinged to the arm of described hook portion and the section of being fastened to 3, and this arm covers on the flap of extension articulated section of the section of being fastened to 3.Advantageously, it is fastening that described arm is used threaded connector, and described threaded connector is that the flap of described arm and described extension articulated section shares.
In the second design of the present invention, the hook portion of described safety device is secured to the 3rd section or the section of back more, fixes with respect to this section maintenance.Described hook portion with as the combining effect of locator of a part that comprises first paragraph and comprise possibly the sub-component of outer cover, as long as advantageously on locator (from the stringer sides of described section to the pin of the giving prominence to) section of being positioned at 1.This integral body hook portion has installing plate, connector and latch arm.In folding ladder, described latch arm is pointed to described first paragraph, end be in this section top when described ladder is opened, and extends beyond the locator that is arranged in this section.
After user's rotation, when spread 3 during the bottom of---and possibly after section---, the hook portion of described safety device with described section together with around the axis rotation with section 2 and section 3 articulated sections that are bonded together, when described ladder was fallen and launched, this articulated section was positioned in the top of described section.As the result of rotation, described connector and the latch arm of described hook portion move to below pin, rotatablely moving of described section of release thus, and make it possible to complete the expansion of described ladder.When the folded and described hook portion of described ladder keeps together described section, there is play between the latch surface of locator (pin) and described hook portion.The friction between parts is eliminated in this gap.The hook portion of described safety device is advantageously on the section of being arranged on 3.Thus, when described ladder is unfolded, described hook portion from this section towards bottom angled give prominence to, and do not hinder walking.
In the 3rd design of the present invention, identical with during first designs of the hook portion of described safety device, be independent of the 3rd section and possibly the operation of the 4th section operated by control lever.Described bar has and section 3 or section 2 be rotatably connected, and is arranged on the bottom end vicinity of described section when described ladder is fallen and launched.Described control lever connects with described hook portion by the pull bar along above-mentioned section extension.
Have in section 2 and section the four-part form ladder that extends the articulated section between 3---namely, the ladder between the 4th section section of being positioned in 2 and section 3 when described ladder is folded wherein---lock bottom having in the connection of section 3 and section 4.The not controlled detachment of the described lock section of preventing 3 and section 4.This bottom lock comprises the section of being hinged to 3 or the smooth connector of section 4 and the pin in the section of being arranged on 2.Described connector has longitudinal opening, and described longitudinal opening stops with the recess with load-bearing surface across this opening.Described recess is positioned at described connector and described section that side of the articulated section that connects.Pin in the section of being arranged on 2 and this longitudinal opening with and the lateral notch effect of combining.In addition, described bottom lockset has spring, and described spring forces described connector to be reset to as upper/lower positions: in this position, described pin enters the lateral notch of this longitudinal opening, and by the load-bearing surface that engages described recess, section 4 and section 3 is kept together.When described ladder launched, after overcoming the resistance of described spring, the connector of described lock moves to as upper/lower positions: in this position, described pin left this lateral notch and can move along the total length of this longitudinal opening.
Benefit of the present invention.The folding ladder that is installed on ceiling is equipped with release mechanism to be used to protect in order to avoid at least two back segments break away from from first paragraph, and this is equipped with the folding ladder of release mechanism safer than hitherto known design.This safety device is even more important for the four-part form ladder that promotes center of gravity that has with folded section.In the design, be characterised in that the safety device by the motion control of the section of being unfolded, extra benefit comprises does not need extra control assembly.
Description of drawings
Practical embodiments of the present invention.Illustration folding ladder of the present invention is shown in the following drawings:
Fig. 1: the four-part form ladder, wherein the hook portion of safety device is bonded on and extends on the articulated section; Described ladder is opened and is folded; Axonometric drawing
Fig. 2: the safety device of ladder shown in Fig. 1 (details " A "); Described ladder is opened and is folded; Lateral view
Fig. 3: the safety device of ladder shown in Fig. 1 (details " A "); Upon deployment, its stage casing 3 and 4 is raised; Lateral view
Fig. 4: the bottom lock (details " B ") of ladder shown in Fig. 1; Described ladder is folded; Axonometric drawing
Fig. 5: the four-part form ladder shown in Fig. 1; Described ladder is unfolded; Axonometric drawing
Fig. 6: the safety device of described ladder; Described ladder is unfolded (from the details " C " of Fig. 5); Axonometric drawing
Fig. 7: the bottom lock of described ladder; Described ladder is unfolded (from the details " D " of Fig. 5); Axonometric drawing
Fig. 8: the four-part form ladder, wherein the hook portion of safety device is fastened to the permanent position with respect to section 3; Described ladder is opened and is folded; Axonometric drawing
Fig. 9: the safety device of ladder shown in Fig. 8; Described ladder is opened and is folded; Lateral view
Figure 10: the safety device of ladder shown in Fig. 8; Upon deployment, its stage casing 3 and 4 is raised; Lateral view.
Illustration ladder of the present invention is also shown in other practical embodiments (in being not included in above-mentioned accompanying drawing, but being described by pointing out with the resemblance of above-described embodiment and do not exist together).
The specific embodiment
The folding ladder that embodiment 1. is installed on ceiling has the scalariform ladder unit (1) that comprises four sections.When being unfolded (Fig. 5), first paragraph (11) is positioned at the top, and section 2(12), section 3(13) and section 4(14) descend towards the floor, wherein the 4th section (14) land are on the floor.Each section has two longerons (15), the curb girder that namely is bonded together with a plurality of steps (16).When described ladder was unfolded, the surface of each step was level.Every a pair of section is bonded together by the articulated section that is arranged on the end of described section.The external surface of the longeron (15) of paired (left and right) articulated section section of being attached to.
First paragraph (11) and second segment (12) are bonded together by upper articulated section (21).Be section 2(12) and two sections afterwards provide near the top of the longeron (15) that the pin (2) of the articulated section of rotation is placed in described first paragraph and second segment (when described ladder is unfolded; Fig. 5).When described ladder is folded (Fig. 1), section 1(11) and section 2(12) surface by these longerons contacts with each other.Section 3(13) and section 4(14) be bonded together by lower articulated section (22).Be placed in for the 4th section pin (2) that the articulated section of rotation is provided near the bottom of longeron (15) of these two sections (when described ladder is unfolded).When described ladder is folded, section 3(13) and section 4(14) surface by these longerons contacts with each other.
The section 2(12) and the section 3(13) by the extension articulated section (23) be bonded together.Be section 3(13) and section 4(14) provide the bottom of longeron (15) of pin (2) section of being placed in 2 of the articulated section of rotation and section 3 neighbouring (when described ladder is unfolded; Fig. 5).Each extends the articulated section and has the section of being fixed to 2(12) substrate (24) and the section of being fixed to 3(13) flap (26).From the axis of the pin (2) that extends articulated section (23) to a section 2(12) and section 3(13) distance (when the described ladder is unfolded) section of the being a bit larger tham 4(14 of basal surface of longeron (15)) half of height of cross section of longeron (15).Because extend this design of articulated section (23), at section 3(13) and section 4(14) between use lower articulated section 22, so when described ladder is folded (Fig. 1) section 4(14) section of being placed in 2(12) and section 3(13) between.
The folding ladder of four-part form has safety device (3) and is used for protecting the section of avoiding 2(12), section 3(13) and section 4(14) from the not controlled disengaging of first paragraph (11).This mechanism is arranged on extends on articulated section (23), this means when described ladder is fallen and launched the described section of the being positioned at 1(11 of mechanism) the top near.The critical component of this safety device is the hook portion (31) that is hinged on pin (25), the pin (25) be fixed to the section of being fixed to 2(12) extension articulated section substrate (24).Described pin (25) is load segment 2(12) longeron in bolt.A lining is inserted on described bolt, play following two effects: the outer cylinder surface of described lining is that the hook portion (31) of safety device provides axis, the bush face transmission is from the pressure of described bolt simultaneously, and described bolt will extend articulated section substrate (24) section of being fixed to 2(12).The latch surface (32) of hook portion (31) with from section 1(11) outstanding latch (17) effect of combining of the external surface side direction of longeron.When described ladder is folded, have play between the latch surface (32) of pin (17) and hook portion, it is convenient to the user to (31) release of described hook portion and in the situation that fiercely opens the not controlled motion deceleration of outer cover and the ladder section of making 2 and section afterwards.Opposition side in latch surface (32), hook portion have inclined surface (33), and this inclined surface is convenient in the time of folding described section, a hook portion (31) be buckled into latched position automatically.In addition, safety device has the spring (34) that is wrapped on pin (25), and the power of this spring moves to latched position with described hook portion (31).Top in described hook portion (31), there is a retainer (35), this retainer at the terminal position of described hook portion against extending articulated section substrate (24) section of being fixed to 2(12) the head (invisible in Fig. 2 and 3, as to be found under retainer in Fig. 6) of bolt (26).
The running of described hook portion (31) is controlled by non-lock bolt pull bar (36), and this non-lock bolt pull bar (36) is hinged to described hook portion (31) and is hinged to arm (37), and described arm (37) covers the section of being fixed to 3(13) the flap (27) of extension articulated section on.It is fastening that described arm (37) and described flap (27) are used threaded connector: bolt (28) is that described arm and flap share.Non-lock bolt pull bar (36) has longitudinal opening (38) and is used for being placed in the pin (39) of head the side surface of described hook portion (31), this provides rotation and is slidably connected, and is connected to only being rotatably connected based on the pin of the circular open that is placed in described non-lock bolt pull bar and described arm between non-lock bolt pull bar (36) and arm (37).
Whole scalariform ladder unit (1) is arranged on ceiling in framework (4) together with bottom outer cover (5) in.First paragraph (11) is fastened to outer cover (5) by dihedral locator (51).Contiguous this section of handrail (52) is fastened to outer cover so that walk and improve safety.Outer cover (5) connects with described framework (4) by articulated section (41) and connector (42), the open angle of the described outer cover of described articulated section (41) and connector (42) restriction.Being arranged on spring (43) between described framework (4) and described outer cover (5) makes to be easier to described outer cover (5) is promoted together with described ladder (1) and simultaneously they is stored in framework, on the other hand, reduce the speed that described outer cover and ladder descend.In addition, described framework comprises that a seat section (44) is used for making described outer cover (5) to keep the lock of closing.
Described scalariform ladder unit (1) has bottom lock (6) and is used for protecting the section 3(13 that avoids being arranged on lower articulated section (22)) and section 4(14) controlled deployment not, this time articulated section (22) connects this two sections.Bottom lock (6) comprises smooth connector (61) and two pins (62), and each pin is arranged in one of lower articulated section (22) plate.Described pin is load segment 3(13) and the section 4(14) longeron in bolt.Described pin has outer liner, described outer liner plays following two effects: the combining effect of connector (61) of the outer cylinder surface of described lining and bottom lock, and the apparent surface of described lining transmission is from described lower articulated section (22) being fastened to the pressure of the bolt of described section.Described connector (61) has a circular open and is used for being arranged on a described pin (62), and described connector (61) has a longitudinal opening (63), this longitudinal opening (63) stops with a lateral notch (64), holds another pin (62).Described lateral notch has the load-bearing surface that coordinates described pin.In the embodiment of the bottom shown in Fig. 4 and 7 lock, connector (61) section of having and be arranged on 3(13) being rotatably connected of the pin (62) in, pin (62) section of the being installed in 4(14 of the effect of combining with described longitudinal opening (63)) in.Yet connector can opposite location be installed, and does not affect the functional of described lock.Described bottom lockset has and is wound into described connector (61) and has spring (65) on the pin (62) that is rotatably connected with it.Described spring forces described connector automatically to be reapposed to latched position.
Ladder shown in Figure 1 is opened and is folded, prepares to be stored in framework or prepares to launch to be used for walking.When described ladder was closed, described scalariform ladder unit (1) was stored in described framework (4), and the bottom opening of the described framework of described outer cover (5) sealing.The process of launching starts to be opened described outer cover (5) and reduce together with this scalariform ladder unit (1).Make thus described outer cover and described ladder stop at fast described connector (42) compulsory position, section 2(12 in the situation that fiercely open described outer cover and described ladder), section 3(13) and section 4(14) can be from opening the stop resilience and rotating based on the articulated section of connecting section 1 and 2.In this case, described safety device is according to the latch surface (32) of described hook portion (31) with from section 1(11) the outstanding locator of longeron external surface side direction/pin (17) between play allow second segment and section summary micromotion afterwards.Then, section 2(12), section 3(13) and section 4(14) will drop on first paragraph (11) under himself weight effect.
In addition, at section 3(13) with a section 4(14) not controlled resilience and described period while be in the situation that rotation on the section 2 and 3 that is connected, the motion of section 3 and 4 will be limited to the play of the longitudinal opening (38) of non-lock bolt pull bar (36), and the described hook portion of not release (31).Then, section 3 and 4 will be on the section of dropping on 2 under the effect of himself weight.
In order to launch described ladder, user raising section 3(13) and section 4(14) the bottom, simultaneously based on extending described section of articulated section (23) rotation.At first this will close the gap in the longitudinal opening (38) of non-lock bolt pull bar (36).Then, if the user continues to promote described two sections, described non-lock bolt pull bar (36) will be mentioned described hook portion (31), and the latch surface (32) of described hook portion (31) will be by away from from section 1(11) described pin (17) that side direction is outstanding removes.This is with release and make it possible to launch described ladder, as long as lock by the bottom section 3(13 that (6) are held togather) and section 4(14) motion by this way, namely make described section to be adjacent to each other.In final stages of deployment, described connector (61) is rotation in bottom lock (6), makes the described pin (62) of the effect of combining with the longitudinal opening (63) of described connector can leave described lateral notch (64).Then, deployable section 3(13 of user) and section 4(14), as long as during launching, this pin (62) motion in the longitudinal opening (63) of the connector (61) of bottom lock.In folding ladder (Fig. 5), the parts of described safety device and described bottom lock are located as shown in Fig. 6 and 7 respectively.
For folding described ladder, the user promotes the section of comprising 2(12), section 3(13) and section 4(14) base section, rotate them based on extension articulated section (23).Then, section 4(14) based on lower articulated section (22) rotation, and the section of being folded in 3(13) under.At section 4(14) final revolving process, the connector that is loaded with spring (61) of bottom lock automatically is directed to the lateral notch (64) of its longitudinal opening (63) on the pin (62) of the effect of combining with the load-bearing surface of described recess, and section 3 and section 4 are combined.Continue section 2(12 along with folding) rotate and the section of leaning against 1(11 based on upper articulated section (21)) the surface on, section 3(13) and section 4(14) rotate the top of the section of making 4 sections of being in 2 based on extending articulated section (23).Terminal stage at folding described section, the hook portion of described safety device (31) with its inclined surface (33) with from section 1(11) pin (17) adjacency that side direction is outstanding, then after the resistance that overcomes from spring (35), rise on described pin and automatically buckle into described pin (17) back with its latch surface (32), thus with section 2,3 and 4 with section 1 combination.Then, this scalariform ladder unit (1) that is retracted to outer cover (5) is raised by spring (43) based on articulated section (41) together with outer cover, and is stored in described framework (4).Then, the bottom opening of the described framework of described outer cover sealing.
The folding ladder that embodiment 2. is installed on ceiling has the scalariform ladder unit (1) that comprises four sections, and as in the first practical embodiments, each section comprises two longerons (curb girder) and a plurality of step.This unit section of comprising 1(11), section 2(12), section 3(13) and section 4(14), be illustrated as being unfolded and preparing in Fig. 5 for.As in the first practical embodiments, section 1(11) and section 2(12) connect section 3(13 by upper articulated section (21)) and section 4(14) connect section 2(12 by lower articulated section (22)) and section 3(13) be bonded together by extending articulated section (23).When described ladder is folded (Fig. 5), section 4(14) section of being placed in 2(12) and section 3(13) between.
The folding ladder of this four-part form has safety device (7) and is used for protecting the section of avoiding 2(12), section 3(13) and section 4(14) from the not controlled disengaging of described first paragraph (11).This safety device is installed in slightly and locates lower than described extension articulated section (23), therefore when described ladder is fallen and launched, its section of being positioned in 1(11) the top near.This safety device comprises: the hook portion section of being fastened to 3(13) (71), and it keeps fixing with respect to this section; And, locator, itself and the effect of combining of described hook portion.Described hook portion has from section 1(11) the form of the outstanding pin (17) of longeron external surface side direction.The monolithic hook portion has by bolt (73) section of being fastened to 3(13) installing plate (72).In addition, described hook portion (71) has and is parallel to described longeron and points to latch arm (74) upwards, and when described ladder was fallen and launched, this latch arm extended beyond from section 1(11 from the bottom) the described locator given prominence to of side direction/pin (17).
As in the first practical embodiments, whole scalariform ladder unit (1) is used framework (4) with bottom outer cover (5) and is arranged in ceiling.First paragraph (11) is fastened to described outer cover (5) by dihedral locator (51).Contiguous this section of handrail (52) is installed.Outer cover (5) connects with described framework (4) by the articulated section (41) that is used for the open angle restriction and connector (42) and spring (43).This scalariform ladder unit (1) has bottom lock (6), and it is used for protecting the section of avoiding 3(13) and section 4(14) controlled detachment not, design and the operation identical with the first practical embodiments had.
Ladder shown in Fig. 8 is opened and is folded, prepares to be stored in described framework or prepares to launch for walking.In the situation that fiercely open described outer cover and described ladder make thus described outer cover and described ladder stop at fast described connector (42) compulsory position and section 2(12), section 3(13) and section 4(14) not controlled resilience is simultaneously based on articulated section (21) rotation of connecting section 1 and 2, the latch arm of described hook portion (74) will be by from section 1(11) outstanding pin (17) maintenance of external surface side direction.Then, section 2(12) and afterwards section will be on the section of dropping on 1 under himself weight effect.
In order to launch described ladder, the user needs raising section 3(13) and section 4(14) base section simultaneously rotate them based on extending articulated section (23).Then, hook portion (71) will be rotated down a little, and the latch arm of described hook portion will the section of dropping to 1(11) in locator/below pin (17).This makes it possible to based on upper articulated section (21) rotation section 2(12) and the top section of moving apart 1(11 that will this section).Launch and discharge identical in the further process of bottom lock (6) and the first practical embodiments.
The user need to put upside down said process with folding described ladder, only in the final folding stage, just at the section of making 2(12) section of being in 1(11) the top before, the user needs raising section 3(13) and section 4(14) the bottom, the latch arm (74) that makes described hook portion (71) is through from the outstanding pin (17) of section 1.With section 2(12), section 3(13) and section 4(14) section of leaning against 1(11) upper after, the latch arm (74) of described hook portion (71) engages with described pin (17) and its protective effect.
Be arranged on lower articulated section with the identical safety device in the first practical embodiments, also as in the first embodiment, in the connection of the section of being positioned at 2 and section 3.When described ladder is fallen and is launched, near the top of the described safety device section of being positioned in 1.Because the section of existence 4, so this ladder does not have the bottom lock.
The hook portion of described safety device is released by the bottom of raising section 3, and described ladder is unfolded simultaneously.
What embodiment 4. the 4th design was the four-part form ladder, most of parts---especially lock each section, framework, outer cover, connection and bottom---with in the first practical embodiments is identical.The safety device that is arranged on the extension articulated section of connecting section 2 and 3 has hook portion, and the locator on described hook portion and section 1/pin effect of combining is as in the first practical embodiments.
The control of the hook portion of this safety device is different, because this design has the manual control lever of base section of the longeron of the section of being hinged to 3.This control lever uses along the pull bar of this section extension and connects with the hook portion of described safety device.In order to launch described ladder, the user is placed in control lever " hook portion release " position.Then, the user by follow with the first embodiment in the same steps as that is used for ladder discussed launch each section.
Claims (12)
1. folding ladder, especially four-part form fold ladder, be designed to be arranged in ceiling, open downwards, especially open downwards together with the bottom outer cover of framework in being arranged on described ceiling, be expanded to the room of described ceiling below, engage with described framework by linkwork and via described outer cover, comprise a plurality of scalariform ladder sections that engage by the articulated section, the junction that described articulated section is arranged on continuous segment at top or the place, bottom of the longeron of described section, the first paragraph that is positioned at the top of all sections when described ladder launches engages with second segment by following articulated section: this articulated section is characterised in that its rotation is just in time near the top surface of the longeron of these two sections, it is characterized in that, described articulated section has safety device (3, 7) be used for protecting in order to avoid by rotating at least two back segments based on the articulated section (21) that is positioned at described section bottom when described ladder is fallen and launched from the not controlled disengaging of described first paragraph (11), as long as described safety device has hook portion (31, 71), described hook portion is bonded together top section and a section in afterwards section with comprising described first paragraph (11) and advantageously comprise together with the sub-component of described outer cover (5), as long as when described ladder is fallen and is launched, described hook portion is positioned near the top of described first paragraph (11), and described hook portion is by user's release.
2. ladder according to claim 1, it is characterized in that, described safety device (3,7) described hook portion (31,71) release in the following manner: the described at least back segment of described ladder is promoted, make it be rotated motion based on the articulated section (23) that is positioned at the top when described ladder is fallen and launched simultaneously.
3. ladder according to claim 1 and 2, it is characterized in that, described ladder comprises four scalariform ladder sections, wherein in the ladder that launches, the 4th section (14) several from the top are bonded together by following articulated section (21) and the 3rd section (13): the rotation (2) of described articulated section (21) is positioned at the bottom of the longeron of these two sections, section 2(12) and section 3(13) be bonded together by following articulated section (23): described articulated section (23) are referred to as " extension articulated section ", the bottom one that its rotation (2) departs from the longeron of these two sections is the distance of half at least of the cross-sectional height of the longeron (15) of these two sections, make when described ladder is folded, the 4th section (14) section of being positioned in 3(13) and the section 2(12) between, section 2(12) lean against on described first paragraph (11), be used for protecting in order to avoid by rotate based on the articulated section that section 1 and 2 is bonded together (21) all the other sections from described first paragraph (11) not the hook portion (31) of the described safety device (3) of controlled disengaging be positioned near described extension articulated section (23).
4. ladder according to claim 3, it is characterized in that, described hook portion (31) release in the following way of described safety device (3): will connect the section 3(13) and the section 4(14) lifting, simultaneously make these two sections be rotated motion based on described extension articulated section (23), and the articulated section (22) of the section of making 3 and section 4 is from section 2(12) separate.
5. according to claim 1 and 2 or 3 or 4 described ladders, it is characterized in that, the described hook portion (31) of described safety device (3) is bonded together by articulated section and described second segment, and by be hinged to described hook portion and described after section in the non-lock bolt pull bar (36) of a section carry out release, as long as described hook portion (31) advantageously has inclined surface (33) at the opposing face of latch surface (32), described inclined surface is convenient to described hook portion and is automatically buckled into latched position.
6. according to claim 3 or 4 described ladders, it is characterized in that, the described hook portion (31) of described safety device (3) is hinged to the substrate (24) of described extension articulated section (23), and carry out release by the pull bar (36) that is hinged to described hook portion and is hinged to arm (37), described substrate is fastened to described second segment (12), and described arm (37) is fastened to the 3rd section (13).
7. ladder according to claim 6, it is characterized in that, described arm (37) is connected to described non-lock bolt pull bar (36), on the flap (27) of the extension articulated section (23) of advantageously using threaded connector (28) to cover to be fastened to the 3rd section (13), described threaded connector (28) is that the flap (27) of described arm (36) and described extension articulated section shares.
8. according to claim 5 or 6 or 7 described ladders, it is characterized in that, non-lock bolt pull bar (36) has longitudinal opening (38), and this longitudinal opening makes in the parts that are placed in the effect of combining with described pull bar, advantageously the pin (39) on the described hook portion (31) of described safety device can move.
9. according to claim 1 and 2 or 3 or 4 described ladders, is characterized in that, the described hook portion (71) of described safety device (7) advantageously is secured to the 3rd section (13), or be secured to the section of a back, keeps fixing with respect to described section.
10. according to claim 1 and 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 described ladders, it is characterized in that, the locator effect of combining with the described hook portion (31) of described safety device (3), in comprising described first paragraph (11) and advantageously comprising the sub-component of described outer cover (5) has the form from the stringer sides of described first paragraph (11) to outstanding pin (17), as long as advantageously, when described ladder is folded, there is play between the latch surface (32) of described pin (17) and described hook portion.
11. according to claim 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 described ladders, have four sections, it is characterized in that, section 3(13) and section 4(14) the junction have the bottom and lock (6), described bottom lock prevents the controllably expansion of these two sections, each bottom lock comprises the smooth connector (61) that is hinged to a section in described section and is placed in pin (62) in another section, described connector (61) has longitudinal opening (63), described longitudinal opening (63) stops with the recess (64) across described opening, with described pin (62) effect of combining.
12. ladder according to claim 11 is characterized in that, the described connector (61) of described bottom lock is in abutting connection with section 3(13) and section 4(14) articulated section (22) that is bonded together.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL396562A PL220639B1 (en) | 2011-10-06 | 2011-10-06 | Dismountable stairs, especially the four-segment stairs |
| PLP.396562 | 2011-10-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103104075A true CN103104075A (en) | 2013-05-15 |
Family
ID=47080151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103774522A Pending CN103104075A (en) | 2011-10-06 | 2012-10-08 | Foldable stairs especially of 4 segments |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2578768B1 (en) |
| CN (1) | CN103104075A (en) |
| PL (1) | PL220639B1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104746816A (en) * | 2013-12-31 | 2015-07-01 | 德胜（苏州）洋楼有限公司 | Concealed storage staircase for wooden house |
| CN104863494A (en) * | 2015-06-05 | 2015-08-26 | 苏州金螳螂建筑装饰股份有限公司 | Climbing ladder and storage rack with same |
| CN105460200A (en) * | 2014-09-29 | 2016-04-06 | 空中客车运营简化股份公司 | Aircraft comprising a flap and a fall-prevention device |
| CN105863496A (en) * | 2016-04-12 | 2016-08-17 | 国家电网公司 | Outdoor working ladder |
| CN107447947A (en) * | 2017-08-19 | 2017-12-08 | 合肥耀世同辉科技有限公司 | One kind is easy to carry Wood-plastic floor |
| CN111997202A (en) * | 2020-09-01 | 2020-11-27 | 常州工学院 | Cover plate folding and opening type mechanical attic device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201222754D0 (en) * | 2012-12-17 | 2013-01-30 | Keystone Lintels Ltd | An arrangement for mounting a multi-sectional ladder assembly onto a loft ladder frame door |
| US10538966B2 (en) * | 2017-05-10 | 2020-01-21 | Werner Co. | Ceiling ladder, deep step and method |
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| FR1341199A (en) * | 1962-12-13 | 1963-10-25 | Personnes A Responsabilite Lim | Retractable staircase |
| JPH08177363A (en) * | 1994-12-26 | 1996-07-09 | Matsuya Denko Kk | Ladder stored in ceiling space |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104746816A (en) * | 2013-12-31 | 2015-07-01 | 德胜（苏州）洋楼有限公司 | Concealed storage staircase for wooden house |
| CN105460200A (en) * | 2014-09-29 | 2016-04-06 | 空中客车运营简化股份公司 | Aircraft comprising a flap and a fall-prevention device |
| CN105460200B (en) * | 2014-09-29 | 2019-08-20 | 空中客车运营简化股份公司 | Aircraft including panel and anti-dropping apparatus |
| CN104863494A (en) * | 2015-06-05 | 2015-08-26 | 苏州金螳螂建筑装饰股份有限公司 | Climbing ladder and storage rack with same |
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| CN105863496A (en) * | 2016-04-12 | 2016-08-17 | 国家电网公司 | Outdoor working ladder |
| CN107447947A (en) * | 2017-08-19 | 2017-12-08 | 合肥耀世同辉科技有限公司 | One kind is easy to carry Wood-plastic floor |
| CN111997202A (en) * | 2020-09-01 | 2020-11-27 | 常州工学院 | Cover plate folding and opening type mechanical attic device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2578768B1 (en) | 2019-09-11 |
| EP2578768A3 (en) | 2017-05-24 |
| EP2578768A2 (en) | 2013-04-10 |
| PL396562A1 (en) | 2013-04-15 |
| PL220639B1 (en) | 2015-11-30 |
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