CN214943918U

CN214943918U - Herringbone ladder

Info

Publication number: CN214943918U
Application number: CN202121095152.6U
Authority: CN
Inventors: 周永帅
Original assignee: Beijing Anxin Jetta Logistics Co ltd
Current assignee: Beijing Anxin Jetta Logistics Co ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2021-11-30
Anticipated expiration: 2031-05-20

Abstract

The application relates to a herringbone ladder, which comprises two straight ladders, wherein each straight ladder comprises two first stand columns, a second stand column, a fixing device and a transmission device, wherein the second stand column is sleeved on the first stand columns and can slide relative to the first stand columns; the fixing device comprises a pin shaft, a spring sleeved on the pin shaft and a shell wrapping the spring, wherein a circular plate is arranged on the pin shaft, the spring is in a compression state, the spring extrudes the circular plate to push the pin shaft to be inserted on the first stand column and the second stand column, and the shell is installed on the second stand column. The height of the herringbone ladder can be adjusted according to actual needs, so that the herringbone ladder can meet different climbing height requirements in the using process.

Description

Herringbone ladder

Technical Field

The application relates to the field of ladders, in particular to a herringbone ladder.

Background

At present, the herringbone ladder is used when logistics personnel access goods such as express delivery.

The double ladder is usually composed of two hinged single ladders. During the use, the user erects the double ladder, opens two one-line ladders, and two one-line ladders form certain angle, and the user climbs suitable height along one side one-line ladder, access goods.

To the correlation technique among the above-mentioned, the inventor thinks at the commodity circulation operation in-process, according to the height of goods access, the staff need can provide the ladder of different height of climbing, and short ladder can't play a role when the height that needs the climbing is higher, and long ladder is carried inconvenient when using, and the ladder that highly can't adjust can not satisfy staff's demand.

SUMMERY OF THE UTILITY MODEL

In order to solve at the commodity circulation operation in-process, the high difference of goods access, the staff need the high difference that climbs, the problem that the ladder that highly can't adjust can not satisfy the staff demand, this application provides a double ladder.

The herringbone ladder adopts the following technical scheme:

a herringbone ladder comprises two straight ladders, wherein each straight ladder comprises two first stand columns, a second stand column, a fixing device and a transmission device, wherein the second stand column is sleeved on the first stand column and can slide relative to the first stand column;

the fixing device comprises a pin shaft, a spring sleeved on the pin shaft and a shell wrapping the spring, wherein a circular plate is arranged on the pin shaft, the spring is in a compression state, the spring extrudes the circular plate to push the pin shaft to be inserted on the first stand column and the second stand column, and the shell is installed on the second stand column.

Through adopting above-mentioned technical scheme, when the staff is using the double ladder to get and put the goods, can be according to the height of goods, remove the connection of first stand and round pin axle, control transmission drive second stand, with the height that changes the double ladder, after reaching the required height of staff, insert the round pin axle again and establish on first stand, the round pin axle can carry out the stable connection to first stand and second stand under the effect of spring, thereby the staff of being convenient for uses, height-adjustable double ladder can enough satisfy the different demands of depositing the goods height of staff, can reduce the volume of double ladder again, the convenience is accomodate the double ladder.

Optionally, the transmission device includes a rack fixedly connected to the first column, a gear rotatably mounted on the second column and engaged with the rack, and a motor mounted on the second column and used for driving the gear.

Through adopting above-mentioned technical scheme, the height of double ladder can be adjusted by transmission, and transmission overall structure is simple, and convenient operation is favorable to the staff to adjust wantonly the height.

Optionally, the second upright post is provided with a first opening, and the first opening penetrates through two end faces of the second upright post;

two of a word ladder the rigid coupling has many crossbeams between the first stand, and the crossbeam can pass through first opening.

Through adopting above-mentioned technical scheme, the crossbeam can slide in the second stand through first opening, and the second stand can not produce the interference with the crossbeam, effectively prolongs the slip stroke of second stand to improve the usable height of double ladder.

Optionally, the second column is provided with a second opening, and the gear is engaged with the rack through the second opening.

Through adopting above-mentioned technical scheme, the gear can be through second opening and rack meshing.

Optionally, the second upright post is fixedly connected with two shaft seats, the two shaft seats are distributed on two sides of the second opening, a second hinge shaft hole is formed in each shaft seat, a gear is fixedly connected with a wheel shaft, and the wheel shaft is rotatably installed in the second hinge shaft hole.

Through adopting above-mentioned technical scheme, simple structure's axle bed and pivot are convenient for set up on second stand and gear to do benefit to gear revolve and connect on the second stand.

Optionally, the herringbone ladder further comprises a pedal and two transverse shafts mounted on the pedal;

the pedal comprises an antiskid plate and two side plates, the two side plates are fixedly connected to the lower surface of the antiskid plate at intervals, first hinge shaft holes are formed in the side plates, two ends of the cross shafts are installed in the two opposite first hinge shaft holes, and the two straight ladders are rotatably connected to the two cross shafts respectively.

Through adopting above-mentioned technical scheme, a word ladder and footboard rotate to be connected, can adjust the contained angle between two a word ladders when using the double ladder, and the staff can step on the footboard, and the footboard can provide bigger area of trampling for the crossbeam, promotes the security that the staff used the double ladder.

Optionally, the anti-slip plate is provided with an anti-slip groove.

Through adopting above-mentioned technical scheme, the frictional force increase between user and the antiskid ribbed tile, the user can stably stand on the antiskid ribbed tile.

Optionally, the herringbone ladder further comprises a short plate fixedly connected to the lower end of the second upright post, and a base rotatably connected with the short plate;

the base is composed of two plates, one plate is horizontally arranged, the other plate is vertically arranged, and the horizontally arranged plates are in direct contact with the ground.

By adopting the technical scheme, the contact surface of the base and the ground always faces the ground, so that the effective contact area between the herringbone ladder and the ground is ensured not to change, and the herringbone ladder is kept stable.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the height of the herringbone ladder can be adjusted by the transmission device, the herringbone ladder is fixed by the fixing device after the adjustment is finished, and the ladder body is kept stable when the herringbone ladder is used;

2. the contact area between the herringbone ladder and the ground is kept constant, so that the possibility of shaking caused by the change of the angle of the herringbone ladder is reduced;

3. when the staff stands on the antiskid ribbed tile, frictional force is bigger, and staff's work is safer.

Drawings

FIG. 1 is a schematic structural view of a herringbone ladder;

FIG. 2 is a cross-sectional view of the fixture;

fig. 3 is a cross-sectional view of the transmission.

Description of reference numerals: 1. a pedal; 11. an anti-skid plate; 12. a side plate; 121. a first hinge shaft hole; 2. a horizontal axis; 3. a first upright post; 31. a cross beam; 32. hooking a ring; 33. a connecting rod; 34. a limiting hole; 4. a second upright post; 41. a first opening; 42. a second opening; 43. a short plate; 5. a fixing device; 51. a pin shaft; 52. a pull ring; 53. a spring; 54. a housing; 6. a transmission device; 61. a rack; 62. a gear; 63. a wheel axle; 7. a shaft seat; 71. a second hinge shaft hole; 8. a base.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a herringbone ladder. Referring to fig. 1, a herringbone ladder includes a step 1, two lateral shafts 2 installed on the step 1, and two straight ladders rotatably connected to the two lateral shafts 2, respectively.

Referring to fig. 1, the pedal 1 is composed of a cleat 11 and two side plates 12. The two side plates 12 are fixedly connected to the lower surface of the antiskid plate 11 at intervals. The antiskid groove is formed in the upper surface of the antiskid plate 11, friction between a user and the antiskid plate 11 is increased through the antiskid groove, and the possibility that the user slips is effectively reduced.

Referring to fig. 1, each side plate 12 is provided with two first hinge shaft holes 121, and both ends of the transverse shaft 2 are disposed in the two first hinge shaft holes 121 of the two side plates 12.

Referring to fig. 1, the straight ladder comprises a first upright post 3 rotatably connected to a cross shaft 2, a second upright post 4 slidably sleeved on the first upright post 3, a fixing device 5 installed on the upper end side surface of the second upright post 4, a transmission device 6 for adjusting the positions of the first upright post 3 and the second upright post 4, a shaft seat 7 welded on the side surface of the second upright post 4, and a base 8 hinged to the lower end of the second upright post 4.

Referring to fig. 1, a single straight ladder includes two first vertical columns 3, and a plurality of cross beams 31 arranged at equal intervals are fixedly connected between the two first vertical columns 3. When the lifting device is used, a user holds the first upright post 3 by hands, steps on the cross beam 31, ascends a height and conveniently stores and takes goods.

Referring to fig. 1, a through hole is formed in one end of the first upright 3, the first upright 3 is rotatably connected to the cross shaft 2 through the through hole, and the outer side surface of each first upright 3 is attached to the inner plate surface of the side plate 12.

Referring to fig. 1, a plurality of hook rings 32 are provided on two first columns 3 of one straight ladder, a connecting rod 33 is rotatably connected to each of the two first columns 3 of the other straight ladder, one end of the connecting rod 33 is formed into a hook, and the hook can be hung on the hook ring 32. When the herringbone ladder bears the load, the connecting rod 33 is in a straightening state, the opening angle of the herringbone ladder is limited, and the stability of the ladder body is maintained. The hook ring 32 hung by the adjusting hook can adjust the opening angle of the herringbone ladder.

Referring to fig. 1, the second upright 4 is provided with a first opening 41, the first opening 41 is provided along the length direction of the second upright 4, the first opening 41 penetrates both ends of the second upright 4, and the first opening 41 allows the cross beam 31 to pass through the second upright 4.

Referring to fig. 1 and 2, the fixing device 5 includes a pin 51, a pull ring 52 fixed to the pin 51, a spring 53 sleeved on the pin 51, and a housing 54 covering the spring 53. The housing 54 is cylindrical, two ends of the housing 54 are opened, the size of the opening at one end is the same as the inner diameter of the cylindrical barrel, and the opening at the other end is slightly larger than the diameter of the pin 51. A circular plate with the inner diameter smaller than that of the shell 54 is fixedly connected to the middle of the pin shaft 51. The outer shell 54 is welded on the outer side surface of the upper end of the second upright post 4, and a through hole for the pin shaft 51 to pass through is formed on the outer side surface of the second upright post 4. The spring 53 is compressed by the end face inside the housing 54 and the circular plate on the pin 51.

Referring to fig. 1, the first upright 3 is provided with limit holes 34 arranged at equal intervals. The spring 53 presses the circular plate on the pin shaft 51, so that the pin shaft 51 passes through the through hole on the second upright post 4 and is inserted into the limiting hole 34, and the positions of the first upright post 3 and the second upright post 4 are fixed. When the height of the herringbone ladder is adjusted, the pull ring 52 is pulled, the pin shaft 51 is pulled out of the limiting hole 34, and the first upright post 3 and the second upright post 4 can slide relatively.

Referring to fig. 1 and 3, the transmission device 6 includes a rack 61 welded in the first upright 3, a gear 62 engaged with the rack 61, a wheel axle 63 fixed on the gear 62, and a motor welded on the second upright 4, wherein a rotating shaft of the motor is connected with the wheel axle 63 through a coupling.

Referring to fig. 1, a second opening 42 is formed on a side surface of the second upright 4 opposite to the first opening 41, and the second opening 42 is formed along a length direction of the second upright 4. Two shaft seats 7 are fixedly connected to two sides of the second opening 42 in the length direction, a second hinge shaft hole 71 is formed in each shaft seat 7, and the gear 62 is rotatably connected with the two second hinge shaft holes 71 through a wheel shaft 63.

When the height of the herringbone ladder needs to be adjusted, the motor is started, the pull ring 52 is pulled to enable the pin shaft 51 to be separated from the limiting hole 34, the first upright post 3 and the second upright post 4 slide relatively, when the height reaches a proper value, the pull ring 52 is loosened, the pin shaft 51 is inserted into the corresponding limiting hole 34, and the height of the herringbone ladder is fixed.

Referring to fig. 1, a short plate 43 is fixedly connected to the lower end of the second upright 4, and a circular hole is formed in the short plate 43. The base 8 is composed of two plates, one plate is horizontally arranged, the other plate is vertically arranged, and the base 8 is T-shaped. Round holes are formed in the vertically arranged plate in the base 8, and the vertically arranged plate and the short plate 43 are rotatably connected through a short shaft. When the height of the ladder is adjusted, the base 8 and the short plate 43 relatively rotate, and the contact area of the base 8 and the ground is kept constant, so that the ladder can stably stand in the using process.

The implementation principle of the herringbone ladder in the embodiment of the application is as follows: the height of the herringbone ladder is adjusted between the first upright post 3 and the second upright post 4 through the transmission device 6, and the first upright post 3 and the second upright post 4 are fixed through the fixing device 5. The short plate fixedly connected with the bottom end of the second upright post 4 is rotatably connected with the T-shaped base 8, when the height of the herringbone ladder is adjusted, the contact area between the base 8 and the ground is kept unchanged, and the stability of the ladder body is maintained.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A double ladder is characterized in that: the ladder comprises two straight ladders, wherein each straight ladder comprises two first upright posts (3), a second upright post (4) which is sleeved on the first upright posts (3) and can slide relative to the first upright posts (3), a fixing device (5) for fixing the first upright posts (3) and the second upright posts (4), and a transmission device (6) for adjusting the height of the straight ladder;

fixing device (5) are established spring (53) and the parcel on round pin axle (51) including round pin axle (51), cover shell (54) of spring (53), are provided with the plectane on round pin axle (51), and spring (53) are in compression state, and spring (53) extrusion plectane promotes round pin axle (51) and inserts and establish on first stand (3) and second stand (4), shell (54) are installed on second stand (4).

2. A herringbone ladder as claimed in claim 1, wherein: the transmission device (6) comprises a rack (61) fixedly connected in the first upright post (3), a gear (62) rotatably installed on the second upright post (4) and meshed with the rack (61), and a motor installed on the second upright post (4) and used for driving the gear.

3. A herringbone ladder as claimed in claim 1, wherein: the second upright post (4) is provided with a first opening (41), and the first opening (41) penetrates through two end faces of the second upright post (4);

two of the straight ladder are fixedly connected with a plurality of cross beams (31) between the first upright posts (3), and the cross beams (31) can pass through the first openings (41).

4. A herringbone ladder as claimed in claim 2, wherein: the second upright post (4) is provided with a second opening (42), and the gear (62) is meshed with the rack (61) through the second opening (42).

5. A herringbone ladder as claimed in claim 4, wherein: two shaft seats (7) are fixedly connected to the second upright post (4), the two shaft seats (7) are distributed on two sides of the second opening (42), a second hinge shaft hole (71) is formed in each shaft seat (7), a wheel shaft (63) is fixedly connected to the gear (62), and the wheel shaft (63) is rotatably installed in the second hinge shaft hole (71).

6. A herringbone ladder as claimed in claim 1, wherein: the herringbone ladder also comprises a pedal (1) and two transverse shafts (2) arranged on the pedal (1);

the pedal (1) is composed of an anti-skid plate (11) and two side plates (12), the two side plates (12) are fixedly connected to the lower surface of the anti-skid plate (11) at intervals, first hinge shaft holes (121) are formed in the side plates (12), two ends of the cross shaft (2) are installed in the two opposite first hinge shaft holes (121), and the straight ladder is rotatably connected to the two cross shafts (2) respectively.

7. A herringbone ladder as claimed in claim 6, wherein: the antiskid plate (11) is provided with an antiskid groove.

8. A herringbone ladder as claimed in claim 1, wherein: the herringbone ladder further comprises a short plate (43) fixedly connected to the lower end of the second upright post (4) and a base (8) rotatably connected with the short plate (43);

the base (8) is composed of two plates, one plate is horizontally arranged, the other plate is vertically arranged, and the horizontally arranged plate is in direct contact with the ground.