CN212837553U - Folding multi-step ladder - Google Patents
Folding multi-step ladder Download PDFInfo
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- CN212837553U CN212837553U CN202020675888.XU CN202020675888U CN212837553U CN 212837553 U CN212837553 U CN 212837553U CN 202020675888 U CN202020675888 U CN 202020675888U CN 212837553 U CN212837553 U CN 212837553U
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- connecting rod
- opening
- step ladder
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Abstract
The utility model belongs to the instrument field of ascending a height specifically discloses foldable multi-step ladder, including fore-stock, after-frame, footboard assembly and footboard connecting rod, be equipped with the locking structure between footboard connecting rod and the after-frame, the locking structure is used for injecing the relative position between footboard connecting rod and the after-frame, and the locking structure is including rotating the lock of opening and shutting of connecting on the after-frame inside wall, set up the location couple on the lock of opening and shutting and set up on the footboard connecting rod and with location couple complex reference column, be provided with the spout on the after-frame inside wall, reference column sliding connection is in the spout, footboard connecting rod and after-frame are in reference column department intercrossing, and be equipped with the clearance that is used for holding the footboard connecting rod between lock of opening and shutting and the after-frame, the. The utility model discloses can prevent that the ladder from closing, security performance when having strengthened the use.
Description
Technical Field
The utility model relates to an instrument technical field of ascending a height, concretely relates to foldable multi-step ladder.
Background
The folding herringbone ladder is a common climbing tool and is frequently encountered in daily life and work of people. The folding herringbone ladder generally comprises a front frame, a rear frame, pedal assemblies and pedal connecting rods, wherein the front frame and the rear frame are hinged at the top, the pedal connecting rods are hinged between the adjacent pedal assemblies, and another connecting rod is hinged between the rear frame and the pedal connecting rods. When the ladder is opened, the front frame and the rear frame are opened to drive the pedal assembly to become a horizontal plane for people to use.
However, the existing folding herringbone ladder does not have a self-locking function, and the ladder is easy to fold when being subjected to external force in the using process, so that the safety performance in use is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a foldable multi-step ladder can prevent that the ladder from receiving to close, security performance when reinforcing the use.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a foldable multi-step ladder comprises a front frame, a rear frame, a pedal assembly and a pedal connecting rod, wherein a locking structure is arranged between the pedal connecting rod and the rear frame and used for limiting the relative position between the pedal connecting rod and the rear frame.
Further, the locking structure is including rotating the lock that opens and shuts of connecting on the back frame inside wall, set up the location couple on the lock that opens and shuts and set up on the footboard connecting rod and with location couple complex reference column, be provided with the spout on the back frame inside wall, reference column sliding connection is in the spout, footboard connecting rod and back frame are intercrossing in reference column department, and is equipped with the clearance that is used for holding the footboard connecting rod between lock and the back frame, the lock that opens and shuts even has the piece that resets that is used for reseing.
Furthermore, the bottom edge of the opening and closing lock is a bevel edge, and the high end of the bevel edge is one end close to the opening of the positioning hook.
Further, the lock of opening and shutting includes installation department and locking portion, and the installation department forms the locking step with the laminating of after-poppet inside wall between locking portion and the installation department for form the clearance between locking portion and the after-poppet inside wall.
Furthermore, an unlocking pressing plate perpendicular to the side edge of the installation part is arranged on the installation part of the opening and closing lock.
Further, still be equipped with the folded plate of perpendicular to installation department side on the installation department of the switching lock, the folded plate is located the both sides of installation department respectively with the unblock press plate, and the folded plate is located the spout on the after-poppet, and the piece that resets is equipped with the fixed column including the torsional spring that is located the spout in the spout, and the torsional spring cover is established on the fixed column, and the one end of torsional spring offsets with the spout inner wall, the other end offsets with the folded plate.
Furthermore, the two side edges of the rear frame are provided with locking structures.
Further, the number of the pedal assemblies is two.
Further, the number of the pedal assemblies is three or more.
Furthermore, a shifting fork column is further arranged on the pedal connecting rod and is positioned below the positioning column, and the shifting fork column is also connected in the sliding groove in a sliding mode.
The beneficial effects of the utility model reside in that:
(1) set up the locking structure of the cooperation reference column of the lock that opens and shuts, when the ladder was opened to needs, the staff pulled open the footboard assembly, and the reference column moves up along the spout on the after-poppet to strut the after-poppet, through the block between the reference column on the location couple on the lock that opens and shuts and the footboard connecting rod, thereby realize the locking between footboard connecting rod and the after-poppet. When the ladder is subjected to external force and has a folding trend, the positioning column has a downward sliding trend in the sliding groove on the rear frame, and the positioning column is prevented from moving downwards in the sliding groove through the clamping and locking between the positioning hook and the positioning column, so that the folding of the ladder is prevented, and the self-locking effect is achieved.
(2) The setting of the hypotenuse of the bottom of the opening and closing lock, after the positioning column is abutted against the bottom of the opening and closing lock, the positioning column is abutted against the hypotenuse of the lower side of the opening and closing lock to open and close the opening and closing lock, the automatic opening and closing lock is realized, when the multistep ladder is opened, only the action of pulling the pedal assembly is needed to be completed, and the operation is more convenient.
(3) When the ladder is folded, the unlocking pressing plate is only needed to be manually pressed down, and the opening and closing lock can be driven to rotate, so that unlocking is realized.
Drawings
Fig. 1 is a folding state diagram according to a first embodiment of the present invention;
fig. 2 is a first opening process diagram according to a first embodiment of the present invention;
fig. 3 is a diagram of an opening process of the first embodiment of the present invention;
fig. 4 is a state diagram of the present invention after being fully opened;
FIG. 5 is a first schematic view of the structure of the opening and closing lock in FIG. 4;
FIG. 6 is a second schematic structural view of the opening and closing lock of FIG. 1;
FIG. 7 is a schematic view of the uppermost pedal link of FIG. 4;
fig. 8 is a state diagram after the second embodiment of the present invention is fully opened.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the front frame 1, the rear frame 2, the sliding chute 20, the pedal connecting rod 3, the positioning column 31, the shifting fork column 32, the pedal assembly 4, the opening and closing lock 5, the mounting part 51, the shaft hole 510, the locking part 52, the positioning hook 520, the unlocking pressing plate 53 and the folded plate 54.
Example one
As shown in fig. 1-4, the foldable multi-step ladder of the present embodiment includes a front frame 1, a rear frame 2, pedal assemblies 4 and pedal connecting rods 3, the number of the pedal assemblies 4 is three or more, and the present embodiment takes three pedal assemblies 4 as an example for description.
As shown in fig. 2-4, the inner side wall of the rear frame 2 is provided with a sliding groove 20, and after the ladder is unfolded, the pedal connecting rod 3 close to the uppermost pedal assembly 4 is crossed with the rear frame 2.
Referring to fig. 7, a positioning column 31 and a shifting fork column 32 are disposed in the middle of the pedal connecting rod 3 near the uppermost pedal assembly 4, and the shifting fork column 32 is located below the positioning column 31. The same end of the positioning column 31 and the shifting fork column 32 protrudes out of one side face of the pedal connecting rod 3, the end is a sliding end, the sliding ends of the positioning column 31 and the shifting fork column 32 are arranged in the sliding groove 20 in a sliding mode, the other end of the positioning column 31 protrudes out of the other side face of the pedal connecting rod 3, and the end is a clamping end.
A locking structure for preventing the multi-step ladder from being folded is arranged between the pedal connecting rod 3 close to the uppermost pedal assembly 4 and the rear frame 2, the pedal connecting rod 3 close to the lowermost pedal assembly 4 only plays a role of connecting the middle pedal assembly 4 with the lowermost pedal assembly 4, and the pedal connecting rods 3 described below all refer to the pedal connecting rod 3 positioned at the uppermost position.
The locking structure includes setting up the lock 5 that opens and shuts on 2 inside walls of after-poppet, and the structure of lock 5 that opens and shuts is shown in fig. 5 and fig. 6, including integrated into one piece's installation department 51 and locking portion 52, installation department 51 and the laminating of 2 inside walls of after-poppet form the locking step between locking portion 52 and the installation department 51 for form the clearance that is used for holding footboard connecting rod 3 between locking portion 52 and the 2 inside walls of after-poppet. The mounting portion 51 is provided with a shaft hole 510 corresponding to the rear frame 2, a rivet is inserted into the shaft hole 510, and the opening and closing lock 5 is rotatably mounted on the rear frame 2 by the rivet. The installation part 51 is provided with an unlocking pressing plate 53 and a folded plate 54 which are perpendicular to the side edge of the installation part 51, the folded plate 54 and the unlocking pressing plate 53 are respectively positioned at two opposite sides of the installation part 51, the unlocking pressing plate 53 is positioned at the outer part of the rear frame 2, and the folded plate 54 is positioned in the sliding groove 20 on the rear frame 2. The locking portion 52 is integrally formed with a positioning hook 520 engageable with the engagement end of the positioning post 31. The bottom edge of the locking portion 52 is a beveled edge, and the high end of the beveled edge is the end near the opening of the positioning hook 520. As shown in fig. 7, the engaging end of the positioning column 31 has a limiting cap with an area larger than that of the engaging end, so that after the positioning hook 520 is engaged with the engaging end of the positioning column 31, the limiting cap can cover the positioning hook 520 to prevent the positioning hook 520 from coming off the engaging end of the positioning column 31.
The position department that corresponds the open-close lock 5 in the spout 20 is equipped with the piece that resets that is used for the open-close lock 5 to reset, and the piece that resets includes the torsional spring that is located the spout 20, is equipped with the fixed column in the spout 20, and the torsional spring cover is established on the fixed column, and the one end and the spout 20 inner wall counterbalance of torsional spring, the other end and folded plate 54 counterbalance. When the open-close lock 5 rotates, the folded plate 54 on the open-close lock 5 is squeezed between the sliding chute 20, so that the torsion spring generates torsion.
The utility model discloses open the concrete operation of ladder as follows:
step one, as shown in fig. 1 and fig. 2, the pedal assembly 4 located at the top is pulled open by an external force F, and the positioning column 31 moves upward along the sliding groove 20 on the rear frame 2, so that the rear frame 2 moves away from the front frame 1.
Step two, as shown in fig. 3, when the positioning column 31 reaches the lower side of the open-close lock 5, the positioning column 31 pushes the open-close lock 5 against the bevel edge at the bottom of the open-close lock 5, the open-close lock 5 rotates around the shaft hole 510, and the folded plate 54 and the chute 20 form extrusion, so that the torsion spring generates torsion.
Step three, as shown in fig. 4, when the positioning column 31 exceeds the lower edge of the opening and closing lock 5, the positioning column 31 enters the positioning hook 520 of the opening and closing lock 5, at this time, the opening and closing lock 5 loses the extrusion of the positioning column 31 and resets under the elastic force of the torsion spring, and meanwhile, when the positioning column 31 continues to move up to the stop step passing through the opening and closing lock 5, the positioning column 31 cannot move up any more. When the external force F is released, the positioning column 31 falls back to the positioning hook 520 of the opening and closing lock 5, and the ladder is opened.
When the ladder is used and has a tendency of folding due to the action of external force, the positioning column 31 has a tendency of sliding downwards in the sliding groove 20 on the rear frame 2, and the positioning column 31 is prevented from moving downwards in the sliding groove 20 through the clamping and locking between the positioning hook 520 and the positioning column 31, so that the folding of the ladder is prevented, and the self-locking effect is achieved.
When the ladder needs to be folded, the unlocking and pressing plate 53 is only needed to be manually pressed down, the opening and closing lock 5 can be driven to rotate, so that unlocking is realized, and then the front frame 1 and the rear frame 2 of the ladder are folded.
Example two
The difference between this embodiment and the first embodiment is: as shown in fig. 8, in this embodiment, the number of the pedal assemblies 4 is two, and there is no structure of the shift fork column 32, and the rear frame 2 is driven to expand only by moving the positioning column 31 up in the sliding groove 20.
The inventor is when designing two and three footboard assembly 4's ladder structures, discover if three-step ladder only sets up reference column 31 to drive after-frame 2 struts like two-step ladder, the distance that struts between 1 bottom of after-frame and after-frame 2 bottom was opened to after-frame 2 that can lead to three-step ladder is too big, occupation space is too big, the angle that three-step ladder struts has consequently been redesigned, the angle that three-step ladder struts designs will be little for two-step ladder relatively, consequently, it drives after-frame 2 struts simultaneously through reference column 31 and shift fork post 32 to have set up, make the angle that three-step ladder's after-frame 2 struts be unlikely to too big.
EXAMPLE III
The difference between this embodiment and the first and second embodiments is: in this embodiment, only one of them side of after-frame 2 is provided with the locking structure, only sets up the effect that a locking structure also can play the auto-lock.
The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (9)
1. Foldable multi-step ladder, including fore-stock, after-frame, footboard assembly and footboard connecting rod, its characterized in that: be equipped with the locking structure between footboard connecting rod and the after-frame, the locking structure is used for restricting the relative position between footboard connecting rod and the after-frame, the locking structure is including rotating the lock of opening and shutting, the location couple of setting on the lock of opening and shutting of connecting on the after-frame inside wall to and set up on the footboard connecting rod and with location couple complex reference column, be provided with the spout on the after-frame inside wall, reference column sliding connection is in the spout, and is equipped with the clearance that is used for holding the footboard connecting rod between lock and the after-frame of opening and shutting, and the lock of opening and shutting even has the piece that resets that is used for reseing.
2. The folding multi-step ladder of claim 1, wherein: the bottom edge of the opening and closing lock is a bevel edge, and the high end of the bevel edge is one end close to the opening of the positioning hook.
3. The folding multi-step ladder of claim 2, wherein: the lock of opening and shutting includes installation department and locking portion, the installation department laminates with the after-poppet inside wall, form the locking step between locking portion and the installation department for form between locking portion and the after-poppet inside wall the clearance.
4. The folding multi-step ladder of claim 3, wherein: and an unlocking pressing plate perpendicular to the side edge of the installation part is arranged on the installation part of the opening and closing lock.
5. The folding multi-step ladder of claim 4, wherein: still be equipped with the folded plate of perpendicular to installation department side on the installation department of switching lock, the folded plate is located the both sides of installation department respectively with the unblock press plate, and the folded plate is located the spout on the after-poppet, the piece that resets is including the torsional spring that is located the spout, be equipped with the fixed column in the spout, the torsional spring cover is established on the fixed column, the one end and the spout inner wall of torsional spring offset, the other end and folded plate offset.
6. The folding multi-step ladder of any one of claims 1-5, wherein: the locking structures are arranged on two side edges of the rear frame.
7. The folding multi-step ladder of any one of claims 1-5, wherein: the number of the pedal assemblies is two.
8. The folding multi-step ladder of any one of claims 1-5, wherein: the number of the pedal assemblies is three or more.
9. The folding multi-step ladder of claim 8, wherein: and a shifting fork column is further arranged on the pedal connecting rod and is positioned below the positioning column, and the shifting fork column is also connected in the sliding groove in a sliding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020675888.XU CN212837553U (en) | 2020-04-28 | 2020-04-28 | Folding multi-step ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020675888.XU CN212837553U (en) | 2020-04-28 | 2020-04-28 | Folding multi-step ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212837553U true CN212837553U (en) | 2021-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020675888.XU Active CN212837553U (en) | 2020-04-28 | 2020-04-28 | Folding multi-step ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212837553U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575735A (en) * | 2022-03-11 | 2022-06-03 | 国网河北省电力有限公司邯郸市峰峰矿区供电分公司 | Folding ladder for automatic maintenance of power dispatching |
-
2020
- 2020-04-28 CN CN202020675888.XU patent/CN212837553U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575735A (en) * | 2022-03-11 | 2022-06-03 | 国网河北省电力有限公司邯郸市峰峰矿区供电分公司 | Folding ladder for automatic maintenance of power dispatching |
| CN114575735B (en) * | 2022-03-11 | 2023-10-03 | 国网河北省电力有限公司邯郸市峰峰矿区供电分公司 | Folding ladder for automatic overhaul of power dispatching |
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