CN110043184A - Elevator machine cheats ladder - Google Patents
Elevator machine cheats ladder Download PDFInfo
- Publication number
- CN110043184A CN110043184A CN201810037456.3A CN201810037456A CN110043184A CN 110043184 A CN110043184 A CN 110043184A CN 201810037456 A CN201810037456 A CN 201810037456A CN 110043184 A CN110043184 A CN 110043184A
- Authority
- CN
- China
- Prior art keywords
- ladder
- pivot
- elevator machine
- cheats
- pair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/42—Ladder feet; Supports therefor
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/50—Joints or other connecting parts
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
- E06C9/06—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted
- E06C9/08—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted with rigid longitudinal members
- E06C9/12—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted with rigid longitudinal members laterally displaceable
Abstract
A kind of elevator machine cheats ladder, is installed on building and close at bottom in the elevator lifting hoistway of lift port, and wherein the ladder includes the first ladder and the second ladder, and the first ladder is articulated on certain object, and can be mobile relative to object is determined；Second ladder is used to extend the climbing stroke of the first ladder；Wherein when the ladder is when unused, the ladder can be folded in elevator machine hole with smaller size smaller, when being intended to using the ladder, second ladder is pulled out to the climbing stroke of i.e. extensible first ladder, keep elevator reparing maintenance personnel safer when passing in and out elevator machine hole, and the ladder can be adapted for the elevator machine hole of various different shapes.
Description
Technical field
The present invention relates to elevator more particularly to a kind of ladders for elevator lifting hoistway and positioned at elevator machine hole.
Background technique
Known elevator machine hole is located at the bottom of elevator lifting hoistway, the space for placing the buffer gear of elevator, thus
The relevant laws and regulations such as standard and TaiWan, China standard regulation need to be constructed by elevator safety inspection limits its setting and user
Method.
Elevator machine hole belongs to the place that relatively hazardous and non-common people can often enter and leave, the only maintenance of usual elevator machine hole or
When inspection, elevator machine hole can be in and out of by having maintenance personal.Wherein, when maintenance personal elevator machine hole to be entered, to ensure to tie up
The safety for repairing personnel, regulation is " when elevator machine hole depth is at 1.4 meters or more, it is necessary to which installing allows maintenance personal to hold in regulation
The easily fixation ladder of disengaging elevator machine hole bottom enters the bottom servicing use of machine hole to supply maintenance personal ".And in regulation
Bright fixed fixation ladder refer to the permanently set ladder in elevator pit；Wherein cheated to ensure to pass in and out elevator machine using the ladder
Personnel safety, therefore also have corresponding regulation for the ladder in regulation, but do not limit whether its ladder is scalable
Length or regular length.
Wherein, in the relevant laws and regulations to ladder, it can be seen that vertically be built in elevator machine hole its strut rail back side of ladder with
Machine cheats clear distance that between the walls should be at least 200 millimeters；Ladder height is answered in the use state passed in and out for personnel, overall length
Higher than 1.10 meters of flooring；And used for convenience of user, the distance between entrance and ladder storage position is not greater than 800
Millimeter.
Wherein, ladder be possible to for can folding, flexible or lean to, therefore law regulation has when ladder is by use, ingress edge
Maximum distance between ladder intermediate rail should be 600 millimeters.If but ladder is set to electricity according only to the distance of rules and regulations
Terraced pit can allow the space of elevator lifting hoistway in order to accommodate and allow elevator and ladder, and then make the sky of elevator lifting hoistway
Between need bigger space.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of elevator machines to cheat ladder, accords with legacy specification and there is good receive
The property received and it is good use mobility, and be not required in addition increase elevator lifting hoistway space.
In order to achieve the above objectives, the present invention provides a kind of elevator machine hole ladder, is mounted on the floor indicator of building
In road, and close to the lift port at bottom, it includes one first ladder and one second ladder, which is articulated in one
Determine on object and moved by operatively object is determined between a first position and a second position relative to this, in first position should
First ladder determines object close to this, in first ladder of the second position and this determine to keep a first distance between object；This
Two ladders connect first ladder and can be by operatively moving between a third place and one the 4th position, in the third place
Side by side, second ladder in the 4th position docks with first ladder and extends climbing for second ladder and first ladder
Stroke, and the root edge of lift port keeps a second distance at the top to bottom of second ladder, which is greater than should
First distance.
Effect of the invention is that allow elevator reparing maintenance personnel when passing in and out elevator machine hole, it is safer, and allow
Elevator machine hole ladder can be adapted for the elevator machine hole of various different shapes.
Detailed description of the invention
Fig. 1 is that the elevator machine of the first preferred embodiment of the invention cheats the perspective view that ladder is folded in elevator machine hole；
Fig. 2 is that the elevator machine of above-mentioned first preferred embodiment cheats ladder in the perspective view of folding state；
The elevator machine that Fig. 3 is Fig. 2 cheats ladder front view；
Fig. 4 is that the elevator machine of above-mentioned first preferred embodiment cheats the partial exploded view of ladder；
Fig. 5 is the partial enlarged view of Fig. 2；
Fig. 6 is the side view of Fig. 5, discloses the first ladder in first position；
Fig. 7 is side view, discloses the first ladder in first and converts position；
Fig. 8 is side view, discloses the first ladder by first position and is expanded to the second position；
Fig. 9 is side view, discloses the second ladder by the third place and is expanded to the second conversion position；
Figure 10 is side view, discloses the second ladder by the second conversion position and is moved to the 4th position；
Figure 11 is perspective view, discloses intubation in the second ladder；
Figure 12 is perspective view, discloses intubation and is moved between the first ladder and the second ladder；
Figure 13 side view discloses intubation bottom end and is resisted against third pivot；
Figure 14 is exploded view, discloses the state that the second ladder and third ladder decompose；
Figure 15 perspective view discloses the state that the second ladder is docked with third ladder；
Figure 16 is that the elevator machine of the first preferred embodiment of the invention cheats the perspective view that ladder is deployed in elevator machine hole entirely；
Figure 17 is the 17-17 sectional view of Figure 16；
Figure 18 is that the elevator machine of above-mentioned first preferred embodiment cheats the schematic diagram that ladder prolongs sliding rail movement；
Figure 19 is that the elevator machine of the second preferred embodiment of the invention cheats the perspective view that ladder is deployed in elevator machine hole entirely.
[symbol description]
100 elevator machines cheat ladder
10 determine object
12 fixed 13 fixed block of bracket, 14 first pivots
16 connecting rod, 162 circular hole, 164 first long slot hole
20 first ladders
22 connection structures
222 vertical plate, 224 arc-shaped slot, 24 third pivot
224a first end 224b second end
30 second ladders
30a perforation 32 second pivots 34 intubation
The lower initial point of initial point 364 on 36 second long slot holes 362
38 control stick, 382 fastener, 39 trip
40 third ladders
42 first positioning hole, 44 second location hole, 46 trip
50 bolts
60 slide units
62 sliding rail, 64 slide unit, 66 fin
The first position the P1 second position P2 P3 the third place
The 4th position P5 first of P4 converts position P6 second and converts position
L1 first distance L2 second distance
Specific embodiment
For that can be illustrated more clearly that the present invention, now enumerates multiple preferred embodiments and cooperate attached drawing detailed description is as follows.Please
Join shown in Fig. 1 to Figure 18, the elevator machine for the first preferred embodiment of the invention cheats ladder 100, is installed on building and close to most
At lower section in the elevator lifting hoistway of lift port, for allowing the personnel that need to enter elevator machine hole to be able to cheat ladder by elevator machine
100 enter elevator machines hole in, wherein the elevator machine hole ladder 100 include determine object 10, the first ladder 20, the second ladder 30,
Third ladder 40, bolt 50 and slide unit 60.
It please cooperate shown in Fig. 4, it includes fixed 12, two pair of first pivot 14 of bracket and two pairs of connections that this, which determines object 10,
Bar 16 please cooperates again shown in Fig. 5 and Fig. 6, and wherein 16 one end of connecting rod is pivotally connected first ladder 20, and the other end then passes through
One pivot 14 and be pivotally connected with fixed bracket 12, allow the first ladder 20 by connecting rod 16 relative to fixed 12 pivot of bracket
It puts between first position P1 shown in Fig. 2 and second position P2 shown in Fig. 8.Wherein, connecting rod 16 is connected to fixed branch
One end of frame 12 has a circular hole 162 and is connected to one first long slot hole 164 of the circular hole 162, and the sectional area of the first pivot 14
For the long column shape for cooperating the first long slot hole 164, when the first ladder 20 is folded in fixed bracket 12, respectively first pivot 14 divides
Not Wei Yu respectively (Fig. 6 reference) in first long slot hole 164, make first ladder 20 will not in the case where being not affected by control, because
External factor (such as vibration) and leave first position P1.
Fig. 7 show lifting ladder upwards and makes 162 position change of circular hole in connecting rod 16, i.e. the first pivot 14 changes
It falls in circular hole 162, then pulls out ladder so that the first ladder 20 is moved to shown in Fig. 8 toward away from the direction for determining object 10
Second position P2.In addition, it is noted that in this present embodiment, arc is taken in the two sides up and down of first pivot 14
Face design when the first pivot 14 rotates in circular hole 162, can be rotated swimmingly along the inner peripheral surface of circular hole 162 whereby.
Among the above, when the first ladder 20 is located at first position P1, the first ladder 20 is close to determining object 10, and electricity
Terraced machine hole ladder 100 is in folding state, at this point, between the entrance of elevator lowest floor and elevator machine hole 100 storage position of ladder
Distance is less than 800 millimeters.When the first ladder 20 is located at second position P2, the first ladder 20 with determine object 10 and maintain first
Distance L1, wherein first distance L1 (Fig. 8 reference) between 200 millimeters~600 millimeters.
More specifically, the first ladder 20 be manipulated from first position P1 be moved to the process of second position P2 by using
Person manipulates the first ladder 20 and up lifts together with the second ladder 30 (Fig. 6 reference) to the first conversion position P5 (Fig. 7 reference), this
When connecting rod 16 in vertical state, and the first pivot 14 is moved in circular hole 162 by being detached from the first long slot hole 164, then again
The first ladder 20 is manipulated together with the second ladder 30 to fix bracket 12 is that fulcrum pulls out so that the first ladder 20 is located at the
Two position P2 (Fig. 8 reference), at this time connecting rod 16 with the first pivot 14 be fulcrum rotated in circular hole 162 make connecting rod 16 by
Plumbness pivot pendulum is horizontality.In addition, may be provided with a fixed block 13 in fixed frame 12, this is fixed in an embodiment
Block 13 whereby, when connecting rod 16 is switched to horizontality, can be born against on fixed block 13 for the breasting of connecting rod 16, thus
It is maintained at horizontality.But in other embodiments, it is not limited thereto, it for example, can also be mobile by the second ladder 30
When to second position P2, born against on slide unit 64 by 30 bottom of the second ladder, to provide support effect.
Please cooperate shown in Fig. 5 again, which also includes a pair of of connection structure 22, and wherein connection structure 22 is divided
Not Ju You two panels vertical plate 222 pipeline section at the top of the first ladder 20, and each pair of vertical plate are connected in a manner of facing each other
222 have two arc-shaped slots 224 being correspondingly arranged, and the second ladder 30 has the second pivot 32, wherein the second pivot 32 is worn
Two arc-shaped slots 224 are crossed, the second ladder 30 is enable to be connected to the first ladder 20.Aforementioned arc-shaped slot 224 includes first
224a and second end 224b (Fig. 6 reference) is held, when the second pivot 32 is located at the first end 224a of arc-shaped slot 224, the
Two ladders 30 can be manipulated for fulcrum with the second pivot 32 and be displaced into the 4th position shown in the third place P3 shown in Fig. 8 and Figure 10
It is moved between P4, and also by the second conversion position P6 between the third place P3 and the 4th position P4；Furthermore,
Second ladder 30 as shown in Figure 9 is up overturn the first end that cocked and the second pivot 32 is still located at arc-shaped slot 224
When 224a, the second ladder 30 comes the second conversion position P6, at this point, user, which only needs slightly to exert a force again, above mentions the second ladder 30,
So that the second pivot 32 is moved to second end 224b i.e. along arc-shaped slot 224 indicates that the second ladder 30 comes the 4th position P4, and
It is in upper and lower mated condition (Figure 10 reference) with the first ladder 20, and the second ladder 30 prolongs due to firm dock with the first ladder 20
Long climbing stroke, so that the root edge of lift port maintains a second distance L2 at the top to bottom of the second ladder 30,
Wherein second distance L2 should be higher than that 1.10 meters of flooring, and therefore, second distance L2 is greater than first distance L1.
Illustrate that the second ladder 30 is able to and the firm implementation docked of the first ladder 20 below.Figure 11 please be cooperate to figure
Shown in 13, which includes a pair of of intubation 34, a pair of second long slot hole 36 and a pair of of control stick 38, wherein is inserted
Pipe 34 is set to the part that the second ladder 30 is connected with the first ladder 20, and one end of control stick 38 is connected to 34 pipe of intubation
Body and the facing side of the second long slot hole 36, the other end then pass through the second long slot hole 36, and intubation 34 is enable to be made whereby
User manipulates the fastener 382 being connected on control stick 38, and in the long axial upper initial point 362 of the second long slot hole 36 and lower beginning
It is moved between point 364, still further, the first ladder 20 also includes that third pivot 24 passes through connection structure 22 for connection
Bar 16 is articulated in the upper tubular section of the first ladder 20, and is intubated 34 for fixing the second ladder 30 in the 4th position P4, and passes through
User by control stick 38 fastener 382 separate the second ladder 30, make control stick 38 by upper initial point 362 move down to
Lower initial point 364 is inserted at this point, intubation 34 is moved between the pipeline section of 30 lower part of pipeline section and the second ladder at 20 top of the first ladder
Pipe 34 can be resisted against the third pivot 24 in the first ladder 20, and control stick 38 can be butted on lower initial point 364, avoid 34 mistakes of intubation
Degree is fallen into the first ladder 20.Among the above, fastener 382 can be spring, and one end of spring is connected to control stick 38, separately
One end then hooked in a manner of hook be butted on the second ladder 30 one perforation 30a, it is described make fastener 382 separate the second ladder 30
It is to separate spring one end with perforation 30a.In other embodiments, fastener 382 can be simple hook and have.
Please cooperate again shown in Figure 14 and Figure 15, which is movably inserted in second ladder 30, and should
40 upper section pipe portion of third ladder has a pair of of first positioning hole 42, and lower section pipe portion has a pair of of second location hole 44, wherein the
Three ladders 40 pass through a pair of of bolt 50 and pass through first positioning hole 42 or second location hole 44 and the second ladder 30, keep third terraced
Frame 40 is positioned in the second ladder 30, wherein when bolt 50 is positioned at second location hole 44 and the second ladder 40, third ladder
Frame 40 is in unfolded state, and at the same time, it is in full unfolded state that elevator machine, which cheats ladder 100 as shown in figure 16, wherein when third ladder
When 40 expansion, there can be the place helped and held in about 40 ladder of the second ladder for user, allow ladder above and below user can be more
For safety；And when bolt 50 is positioned at first positioning hole 42 and the second ladder 40, third ladder 40 is in collapse state, and low
It can be collapsed in the second ladder 30 in 40 pipeline section of third ladder of first positioning hole 42, furthermore the second ladder 30 and third ladder
40 can be respectively arranged with mutual corresponding trip 39,46, and user is allowed to be intended to third ladder 40 is positioned to the second ladder 30
A positioning hole 42 is moved to when being positioned at the second 30 second location hole 44 of ladder, because two trips 39,46 can produce after abutting each other
Raw biggish frictional force, when user being avoided to be intended to third ladder 40 being positioned at second location hole 44, third ladder 40 is excessive
It pulls out in outside the second ladder 30.
It please cooperate shown in Figure 17 and Figure 18, slide unit 60 includes an at least sliding rail 62 and a slide unit 64, and determines object 10
It is fixed on slide unit 64, wherein slide unit 60 is that can be operated and be generated the tool of reciprocating movement will more specifically to determine
The fixation bracket 12 of object 10, which is connected on slide unit 64 and is moved by slide unit 64 along sliding rail 62, improves elevator machine hole ladder
100 mobility, have wherein in the present embodiment, in the sliding slot of sliding rail 62 an at least fin 66 for fix slide unit 64 in
On sliding rail 62 and limitation slide unit 64 moving direction, so that slide unit 64 is not readily disengaged from track and is overturned, and in other implementation
In example, fixed bracket can also directly be connect with sliding rail.
It please cooperate shown in Figure 19, in the second preferred embodiment, elevator machine hole ladder 100 also be can be set in face of most
Two side positions of lift port at lower section, such as shown in Figure 19, be arranged in left side, but not limited to this, works as in an embodiment
In, it also may be disposed at right side.
In addition illustrate, in an embodiment, aforementioned motor hole ladder is not limited with being provided with third ladder 40,
For example, it in the case of one, docks to extend climbing stroke and accorded with legacy specification with the second ladder 30 in the first ladder 20 and want
When asking, then third ladder 40 can be omitted.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (11)
1. a kind of elevator machine cheats ladder, it is mounted in the elevator lifting hoistway of building, and close to the lift port at bottom,
Include:
One first ladder is articulated on certain object and is determined object in a first position and a second position by operatively opposite this
Between move, first ladder in first position determines object close to this, first ladder and this in the second position determine object it
Between keep a first distance；
One second ladder, connects first ladder and can be by operatively moving between a third place and one the 4th position, in
Side by side, second ladder in the 4th position docks with first ladder and prolongs second ladder and first ladder of three positions
Long climbing stroke, and the root edge of lift port keeps a second distance, the second distance at the top to bottom of second ladder
Greater than the first distance.
2. elevator machine as described in claim 1 cheats ladder, it includes fixed a bracket, two pair of first pivot that wherein this, which determines object,
And two pairs of connecting rods, respectively the connecting rod one end is pivotally connected first ladder respectively, the other end respectively and respectively first pivot with
The fixation bracket.
3. elevator machine as claimed in claim 2 cheats ladder, wherein respectively first pivot is non-cylindrical bar, each connecting rod one
End is respectively provided with a circular hole and is connected to one first long slot hole of the circular hole, and first ladder is when first position, each connecting rod
In upright setting and respectively first pivot is located in respectively first long slot hole, which respectively should when the second position
Connecting rod is in horizontally disposed and respectively first pivot is located in the respectively circular hole.
4. elevator machine as claimed in claim 3 cheats ladder, wherein first ladder includes a pair of of connection structure, respectively the connection
Structure is respectively provided with two facing arc-shaped slots；Second ladder has a pair of second pivot, and respectively second pivot is distinguished
Be arranged in respectively two arc-shaped slots, and by control respectively at respectively two arc-shaped slots a first end Yu a second end it
Between move, wherein for second ladder when the third place, respectively second pivot is located at the first end；Second ladder is in the 4th
When setting, respectively second pivot is located at the second end.
5. elevator machine as claimed in claim 4 cheats ladder, wherein a pair of of intubation of the second ladder bottom setting, this is to intubation one
End is inserted into the pipeline section at the top of first ladder respectively when second ladder is located at four positions.
6. elevator machine as claimed in claim 5 cheats ladder, wherein first ladder includes a pair of of third pivot, respectively the third
Pivot be respectively used to pivot joint respectively the connecting rod in first ladder, and respectively the third pivot is each passed through at the top of first ladder
Pipeline section, when pipeline section that respectively the intubation one end is inserted into respectively at the top of first ladder, are butted on the respectively third pivot.
7. elevator machine as claimed in claim 6 cheats ladder, wherein second ladder has a pair of second long slot hole and a pair
Control stick, the one end to control stick are separately connected the respectively intubation, and the other end passes through respectively second long slot hole respectively, this is to manipulation
Bar by operation respectively at moved in second long slot hole and drive respectively the intubation displacement.
It include a third ladder and a pair of of bolt, wherein the third is terraced 8. elevator machine as described in claim 1 cheats ladder
Frame is movably inserted in second ladder, and the third ladder top has a pair of of first positioning hole, and lower part has a pair
Second location hole, wherein this when respectively the bolt is each passed through respectively second location hole of second ladder and the third ladder
Three ladders are docked with second ladder, when respectively the bolt passes through second ladder and respectively first positioning hole of the third ladder
When, which is accommodated in second ladder.
9. elevator machine as described in any of the claims 1 to 8 cheats ladder, can be slided by operating and generating reciprocating movement including one
Unit, wherein the slide unit, which has, determines object in the slide unit for fixing this, and this determines object with the slide unit
Sliding and change position.
10. elevator machine as claimed in claim 9 cheats ladder, wherein the slide unit includes an at least sliding rail and a slide unit, is somebody's turn to do
Determine object to be fixed on the slide unit, along this, at least a sliding rail moves the slide unit.
11. elevator machine as claimed in claim 10 cheats ladder, wherein the cell wall of the sliding rail has an at least fin along long axis
To setting, this, which determines object, has the engagement groove configured with the fin, for limiting the moving direction of the slide unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810037456.3A CN110043184A (en) | 2018-01-15 | 2018-01-15 | Elevator machine cheats ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810037456.3A CN110043184A (en) | 2018-01-15 | 2018-01-15 | Elevator machine cheats ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110043184A true CN110043184A (en) | 2019-07-23 |
Family
ID=67273478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810037456.3A Pending CN110043184A (en) | 2018-01-15 | 2018-01-15 | Elevator machine cheats ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110043184A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541672A (en) * | 2019-10-17 | 2019-12-06 | 迅达（中国）电梯有限公司 | Elevator pit ladder stand supporting device |
| CN111472682A (en) * | 2020-03-12 | 2020-07-31 | 江苏人和环保设备有限公司 | Sectional type cat ladder |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87204049U (en) * | 1987-03-21 | 1987-12-02 | 刘庆云 | Folding type ladder |
| CN2677574Y (en) * | 2004-02-19 | 2005-02-09 | 冷鹭浩 | Positioning hinge structure for folding ladder |
| CN102493760A (en) * | 2011-11-21 | 2012-06-13 | 日立电梯（中国）有限公司 | Pull-up ladder stand |
| CN203081276U (en) * | 2012-12-20 | 2013-07-24 | 山东蓝天重工股份有限公司 | Retractable boarding ladder |
| CN205873582U (en) * | 2016-06-29 | 2017-01-11 | 日立电梯（中国）有限公司 | Coupling mechanism and lift -draw style cat ladder of cat ladder |
| CN205936382U (en) * | 2016-07-25 | 2017-02-08 | 日立电梯（中国）有限公司 | Pit ladder device |
-
2018
- 2018-01-15 CN CN201810037456.3A patent/CN110043184A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87204049U (en) * | 1987-03-21 | 1987-12-02 | 刘庆云 | Folding type ladder |
| CN2677574Y (en) * | 2004-02-19 | 2005-02-09 | 冷鹭浩 | Positioning hinge structure for folding ladder |
| CN102493760A (en) * | 2011-11-21 | 2012-06-13 | 日立电梯（中国）有限公司 | Pull-up ladder stand |
| CN203081276U (en) * | 2012-12-20 | 2013-07-24 | 山东蓝天重工股份有限公司 | Retractable boarding ladder |
| CN205873582U (en) * | 2016-06-29 | 2017-01-11 | 日立电梯（中国）有限公司 | Coupling mechanism and lift -draw style cat ladder of cat ladder |
| CN205936382U (en) * | 2016-07-25 | 2017-02-08 | 日立电梯（中国）有限公司 | Pit ladder device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541672A (en) * | 2019-10-17 | 2019-12-06 | 迅达（中国）电梯有限公司 | Elevator pit ladder stand supporting device |
| CN111472682A (en) * | 2020-03-12 | 2020-07-31 | 江苏人和环保设备有限公司 | Sectional type cat ladder |
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| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190723 |
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