CN211900432U

CN211900432U - Herringbone ladder

Info

Publication number: CN211900432U
Application number: CN202020413414.8U
Authority: CN
Inventors: 顾铁海; 杨光储; 王林
Original assignee: Zhoushan Xinggang Property Management Co ltd
Current assignee: Zhoushan Xinggang Property Management Co ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-11-10
Anticipated expiration: 2030-03-26

Abstract

The utility model belongs to the technical field of the high instrument of ladder climbing, a double ladder is related to. The utility model comprises two vertical frames with hinged upper ends, wherein each vertical frame comprises two vertical columns, each vertical column is provided with a channel, the outer side surface of each vertical column is provided with a chute, a slide block corresponding to the chute is arranged in the channel, a slide block hinge is arranged on the slide block, and the slide block hinge extends out of the chute; the lower end of the upright post is hinged with a support plate through an upright post hinge, the support plate is provided with a support plate hinge, and the support plate hinge and the slide block hinge are connected with a support rod; the inner side surface of the upright post is provided with a limit groove, and a fixing mechanism capable of fixing the slide block on the inner wall of the channel is arranged between the limit groove and the slide block. The utility model has the advantages that: effectively improving the stability of the ladder.

Description

Herringbone ladder

Technical Field

The utility model belongs to the technical field of the high instrument of ladder climbing, a double ladder is related to.

Background

When the aluminum alloy double ladder is used, two persons generally operate, the worker climbs the ladder, and the helper climbs the ladder. When the climbing surpasses two meters, because vibrations and worker's that work produced shake the scheduling reason and lead to the ladder to rock, for avoiding the worker to lead to work efficiency to descend, prevent that the worker from falling from the ladder because of the focus shakiness, the assistant person needs the staircase to improve ladder stability. However, the mode needs two persons to work in a matching way, so that the labor cost is greatly increased; and the work risk of one person is greatly increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a double ladder, the utility model aims to solve the technical problem that: how to improve the stability of the ladder.

The utility model discloses a following technical scheme realizes: a herringbone ladder comprises two vertical frames, the upper ends of the two vertical frames are hinged, each vertical frame comprises two vertical columns, each vertical column is provided with a channel, a long-strip-shaped sliding groove is formed in the outer side surface of each vertical column, the sliding grooves are communicated with the channels, sliding blocks corresponding to the sliding grooves are arranged in the channels in a sliding mode, sliding block hinges are arranged on the sliding blocks, and the sliding block hinges extend out of the sliding grooves; a support plate is hinged to the lower end of the upright through an upright hinge, a support plate hinge is arranged on the support plate, and a support rod is hinged to the support plate hinge and the sliding block hinge; the inner side surface of the upright post is provided with a limiting groove, and a fixing mechanism capable of fixing the sliding block on the inner wall of the channel is arranged between the limiting groove and the sliding block.

In the herringbone ladder, the lower end of each upright post is fixedly provided with the anti-slip sleeve, and the upright post hinge is arranged on the anti-slip sleeve.

In the above herringbone ladder, the fixing mechanism includes an inserting rod, the sliding block is provided with an inserting hole, the inner side surface of the upright post is provided with a limiting groove along the length direction, and one end of the inserting rod penetrates through the limiting groove and is inserted into the inserting hole; two positioning holes are formed in the other inner side face of the upright post along the length direction, each positioning hole corresponds to the inserted rod, and one end of the inserted rod penetrates through the limiting groove, the inserting hole and the positioning hole in sequence and then fixes the sliding block on the inner wall of the channel.

In the herringbone ladder, a fixed seat is fixedly arranged on the inner side surface of each upright post, a rotating shaft is rotatably arranged on the two fixed seats of the upright frame, the rotating shaft is respectively in transmission connection with the sliding blocks through a transmission mechanism, and a U-shaped frame is fixedly arranged on the rotating shaft; when the U-shaped frame rotates clockwise around the rotating shaft to the inner side surface of the vertical frame, the rotating shaft drives the sliding block to slide upwards through the transmission mechanism; when the U-shaped frame rotates anticlockwise around the rotating shaft, the rotating shaft drives the sliding block to slide downwards through the transmission mechanism.

In the herringbone ladder, the U-shaped frame comprises a U-shaped rod and two side lever sliding sleeves which are parallel to each other, the upper ends of the two side lever sliding sleeves are fixedly arranged on the rotating shaft, an installation cavity is arranged in each side lever sliding sleeve, the bottom of the installation cavity is communicated with the lower end surfaces of the side lever sliding sleeves, two ends of the U-shaped rod are respectively in one-to-one correspondence with the two side lever sliding sleeves, and the end parts of the U-shaped rod are slidably arranged in the corresponding side lever sliding sleeves; threaded holes are formed in the side rod sliding sleeves, and threaded rods are connected in the threaded holes in a threaded mode.

In the above herringbone ladder, the transmission mechanism comprises a rack fixedly arranged on the sliding block, the length direction of the rack is consistent with the length direction of the upright post, and the rack corresponds to the limiting groove; the two ends of the rotating shaft are coaxially and fixedly provided with gears, each gear corresponds to one limiting groove, one side face of each gear extends into the corresponding limiting groove, and the gears are meshed and connected with the racks.

Compared with the prior art, the I-shaped ladder has the following advantages:

1. when the herringbone ladder is folded and stored, the supporting plate is close to the outer side surface of the upright post and is in a folded state. At the moment, the sliding block is positioned at the upper stop point of the sliding groove and is fixed on the inner wall of the channel through the fixing mechanism. When the herringbone ladder is used, the fixing mechanism is firstly opened, and the supporting plate is driven to rotate downwards around the upright post hinge. Meanwhile, the supporting plate drives the sliding block to move downwards through the supporting rod. When the supporting plate is contacted with the ground, the sliding block reaches the lower dead point of the sliding groove and is fixed on the inner wall of the channel through the fixing mechanism. At the moment, the supporting rods, the supporting plates and the upright posts form a triangular structure, so that the stability of the herringbone ladder is obviously improved. When the backup pad contacted with ground, the area of contact greatly increased of this word ladder and ground, stability improves, prevents effectively that the stand from sinking. When the supporting plates are folded, the shape of the herringbone ladder is not changed greatly, and the herringbone ladder is favorable for storage. The structure is simple to operate and low in cost.

2. When the U-shaped frame rotates around the rotating shaft, the rotating shaft drives the corresponding rack to slide up and down through the gear. The rack drives the sliding block, and the sliding block drives the supporting plate through the supporting rod, so that the supporting plate rotates up and down around the stand column hinge. The structure drives the two supporting plates on the vertical frame to move synchronously, so that the supporting plates are quickly opened and closed, the working efficiency is effectively improved, and the operation is convenient. In addition, in the use process of the I-shaped ladder, a certain included angle is formed between the plane where the U-shaped frame is located and the plane where the vertical frame is located. The structure prevents the two vertical frames from being folded accidentally, and simultaneously further improves the stability of the herringbone ladder.

3. The U-shaped rod extends out of and retracts into the two side rod sliding sleeves, the length of the U-shaped frame is changed rapidly, so that the bottom rod of the U-shaped rod is in effective contact with the ground, and the stability of the I-shaped ladder is further improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view of the structure at a-a in fig. 1.

Fig. 3 is a sectional view of the structure at B-B in fig. 1.

Fig. 4 is a partially enlarged view at C in fig. 1.

Fig. 5 is a partially enlarged view at D in fig. 2.

Fig. 6 is a cross-sectional view of the structure at E-E in fig. 4.

In the figure, 1, a stand; 11. a pedal; 12. a column; 121. a channel; 13. a limiting groove; 14. a chute; 15. positioning holes; 2. a slider; 21. a slider hinge; 22. a support bar; 23. a jack; 231. inserting a rod; 24. a rack; 3. a support plate; 31. a column hinge; 32. a support plate hinge; 33. an anti-slip sleeve; 4. a rotating shaft; 41. a fixed seat; 42. a gear; 5. a U-shaped frame; 51. a U-shaped rod; 511. a mounting cavity; 52. a side rod sliding sleeve; 521. a threaded hole; 522. a screw.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Referring to fig. 1 to 6, a herringbone ladder includes two vertical frames 1, the upper ends of the two vertical frames 1 are hinged, each vertical frame 1 includes two vertical columns 12, the two vertical columns 12 are parallel to each other, each vertical column 12 has a channel 121, a plurality of pedals 11 parallel to each other are fixedly arranged between the two vertical columns 12, the end of each pedal 11 is fixedly arranged on the inner wall of one channel 121, a strip-shaped sliding groove 14 is formed on the outer side surface of each vertical column 12, the sliding groove 14 is communicated with the channel 121, a sliding block 2 corresponding to the sliding groove 14 is slidably arranged in the channel 121, a sliding block hinge 21 is arranged on the sliding block 2, and the sliding block hinge 21 extends out of the sliding groove 14; the lower end of the upright post 12 is hinged with a support plate 3 through an upright post hinge 31, a support plate hinge 32 is arranged on the support plate 3, and the support plate hinge 32 and the sliding block hinge 21 are hinged with a support rod 22; a limiting groove 13 is formed in the inner side face of the upright post 12, and a fixing mechanism capable of fixing the sliding block 2 on the inner wall of the channel 121 is arranged between the limiting groove 13 and the sliding block 2.

When the herringbone ladder is folded and stored, the supporting plate 3 is close to the outer side surface of the upright post 12 and is in a folded state. At this time, the slider 2 is located at the top dead center of the chute 14, and the slider 2 is fixed on the inner wall of the channel 121 by the fixing mechanism.

When the herringbone ladder is used, the fixing mechanism is firstly opened, and the supporting plate 3 is driven, so that the supporting plate 3 rotates downwards around the upright post hinge 31. Meanwhile, the supporting plate 3 drives the sliding block 2 to move downwards through the supporting rod 22. When the supporting plate 3 contacts with the ground, the sliding block 2 reaches the bottom dead center of the sliding groove 14, and the sliding block 2 is fixed on the inner wall of the channel 121 through the fixing mechanism. At this time, the support rods 22, the support plates 3 and the upright columns 12 form a triangular structure, and the stability of the herringbone ladder is remarkably improved.

When the supporting plate 3 is contacted with the ground, the contact area between the I-shaped ladder and the ground is greatly increased, the stability is improved, and the upright post 12 is effectively prevented from sinking. When the supporting plate 3 is folded, the shape of the herringbone ladder is not changed greatly, and the herringbone ladder is favorable for storage. The structure is simple to operate and low in cost.

Further, the two stands 1 are connected with a connecting rope 6.

When two grudging posts 1 are opened, connect rope 6 and be taut, the setting of connecting rope 6 prevents that grudging posts 1 unexpected outwards from sliding.

Alternatively, the slider hinge 21 and the pillar hinge 31 may be universal hinges.

This structure allows the support plate 3 to rotate not only up and down; when the ground near the lower end of the upright post 11 is uneven, the support plate 3 can rotate left and right around the upright post hinge 31, so that the flexibility of the support plate 3 is improved, and the stability of the herringbone ladder is further improved.

Specifically, an anti-slip sleeve 33 is fixedly arranged on the lower end of each upright 12, and the upright hinge 31 is arranged on the anti-slip sleeve 33.

The anti-slip sleeve 33 is helpful to increase the friction force between the lower end of the upright post 12 and the ground, and the upright frame 1 is prevented from moving on the ground during the working process.

Specifically, the fixing mechanism includes an inserting rod 231, the slider 2 is provided with an inserting hole 23, the inner side surface of the upright post 12 is provided with a limiting groove 13 along the length direction, and one end of the inserting rod 231 penetrates through the limiting groove 13 and is inserted into the inserting hole 23; two positioning holes 15 are formed in the other inner side face of the upright post 12 along the length direction, each positioning hole 15 corresponds to the inserted rod 231, and one end of the inserted rod 231 penetrates through the limiting groove 13, the inserting hole 23 and the positioning hole 15 in sequence to fix the sliding block 2 on the inner wall of the channel 121.

When the sliding block 2 is fixed, one end of the inserting rod 231 penetrates through the limiting groove 13, the inserting hole 23 and the positioning hole 15 in sequence and then the sliding block 2 is fixed on the inner wall of the channel 121, so that the sliding block 2 is fixed. The insertion rod 231 is pulled out of the positioning hole 15, and the slider 2 is moved. The structure is simple and convenient to operate.

Specifically, a fixed seat 41 is fixedly arranged on the inner side surface of each upright post 12, a rotating shaft 4 is rotatably arranged on the two fixed seats 41 of the upright frame 1, the rotating shaft 4 is respectively in transmission connection with the sliding block 2 through a transmission mechanism, and a U-shaped frame 5 is fixedly arranged on the rotating shaft 4; when the U-shaped frame 5 rotates clockwise around the rotating shaft 4 to the inner side surface of the vertical frame 1, the rotating shaft 4 drives the sliding block 2 to slide upwards through the transmission mechanism; when the U-shaped frame 5 rotates anticlockwise around the rotating shaft 4, the rotating shaft 4 drives the sliding block 2 to slide downwards through the transmission mechanism.

When this double ladder was packed up and was deposited, with U-shaped frame 5 round 4 clockwise rotations of pivot, drive slider 2 upwards slides, slider 2 drives backup pad 3 through bracing piece 22, makes backup pad 3 round stand hinge 31 upwards rotate and be close to stand 12 lateral surface. When the U-shaped frame 5 is close to the inner side surface of the vertical frame 1, the sliding block 2 is positioned at the top dead center of the sliding groove 14, and the supporting plate 3 is folded.

When the herringbone ladder is used, the U-shaped frame 5 rotates anticlockwise around the rotating shaft 4, the rotating shaft drives the sliding block 2 to slide downwards, the sliding block 2 drives the supporting plate 3 through the supporting rod 22, the supporting plate 3 rotates downwards around the stand column hinge 31 and is close to the ground, and the supporting plate 3 is opened and forms a triangular structure with the supporting rod 22 and the stand column 12.

After the fixing mechanism fixes the sliding block 2, the rack 24 is locked, so that the U-shaped frame 5 is also locked.

This structure drives two backup pad 3 synchronous motion on the grudging post 1, realizes that backup pad 3 opens fast and draws in, effectively improves work efficiency and convenient operation. In addition, in the use process of the ladder, a certain included angle is formed between the plane of the U-shaped frame 5 and the plane of the vertical frame 1. This structure prevents two grudging posts 12 from accidentally drawing in, further improves the stability of this double ladder simultaneously.

Specifically, the U-shaped frame 5 comprises a U-shaped rod 51 and two side bar sliding sleeves 52 which are parallel to each other, the upper ends of the two side bar sliding sleeves 52 are fixedly arranged on the rotating shaft 4, each side bar sliding sleeve 52 is internally provided with an installation cavity 511, the bottom of the installation cavity 511 is communicated with the lower end faces of the side bar sliding sleeves 52, two ends of the U-shaped rod 51 are respectively in one-to-one correspondence with the two side bar sliding sleeves 52, and the end parts of the U-shaped rod 51 are slidably arranged in the corresponding side bar sliding sleeves 52; a threaded hole 521 is formed in the side rod sliding sleeve 52, and a screw 522 is connected to the threaded hole 521 through a thread.

The structure realizes that the U-shaped rod 51 extends out of and retracts into the two side rod sliding sleeves 52, and the length of the U-shaped frame 5 is quickly changed, so that the bottom rod of the U-shaped rod 51 is effectively contacted with the ground, and the stability of the ladder is further improved. By rotating the screw rod 522, one end of the screw rod 522 passes through the threaded hole 521 and is pressed against the side rod of the U-shaped rod 51, so that the U-shaped rod 51 is fixed on the inner wall of the mounting cavity 511; the screw rod 522 is rotated reversely, so that one end of the screw rod 522 is retracted into the threaded hole 521, and at the moment, the U-shaped rod 51 moves, so that the U-shaped rod 51 can extend out of and retract into the side rod sliding sleeve 52 conveniently.

Specifically, the transmission mechanism comprises a rack 24 fixedly arranged on the sliding block 2, the length direction of the rack 24 is consistent with the length direction of the upright post 12, and the rack 24 corresponds to the limiting groove 13; the two ends of the rotating shaft 4 are coaxially and fixedly provided with gears 42, each gear 42 corresponds to one limiting groove 13, one side surface of each gear 42 extends into the corresponding limiting groove 13, and the gear 42 is meshed and connected with the rack 24.

When the herringbone ladder is folded and stored, the U-shaped frame 5 rotates clockwise around the rotating shaft 4, and the rotating shaft 4 drives the corresponding rack 24 to slide upwards through the gear 42. The rack 24 drives the sliding block 2, and the sliding block 2 drives the supporting plate 3 through the supporting rod 22, so that the supporting plate 3 rotates upwards around the upright hinge 31 and approaches the outer side surface of the upright 12.

When the herringbone ladder is used, the U-shaped frame 5 rotates anticlockwise around the rotating shaft 4, and the rotating shaft 4 drives the corresponding rack 24 to slide downwards through the gear 42. The rack 24 drives the sliding block 2, and the sliding block 2 drives the supporting plate 3 through the supporting rod 22, so that the supporting plate 3 rotates downwards around the column hinge 31 and approaches the ground.

The structure realizes that the U-shaped frame 5 and the supporting plate 3 are synchronously opened and closed, and is convenient to operate.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A herringbone ladder comprises two vertical frames (1), the upper ends of the two vertical frames (1) are hinged, each vertical frame (1) comprises two vertical columns (12), each vertical column (12) is provided with a channel (121), the outer side surface of each vertical column (12) is provided with a long-strip-shaped sliding groove (14), each sliding groove (14) is communicated with the channel (121), a sliding block (2) corresponding to the sliding groove (14) is arranged in the channel (121) in a sliding manner, a sliding block hinge (21) is arranged on the sliding block (2), and the sliding block hinge (21) extends out of the sliding groove (14); a support plate (3) is hinged to the lower end of the upright post (12) through an upright post hinge (31), a support plate hinge (32) is arranged on the support plate (3), and a support rod (22) is hinged to the support plate hinge (32) and the sliding block hinge (21); and the upright post (12) is provided with a fixing mechanism capable of fixing the sliding block (2) on the inner wall of the channel (121).

2. A trestle ladder according to claim 1, characterized in that an anti-slip sleeve (33) is fixedly arranged on the lower end of each upright (12), and the upright hinge (31) is arranged on the anti-slip sleeve (33).

3. The herringbone ladder of claim 1, wherein the fixing mechanism comprises an inserting rod (231), the sliding block (2) is provided with an inserting hole (23), the inner side surface of the upright post (12) is provided with a limiting groove (13) along the length direction, and one end of the inserting rod (231) penetrates through the limiting groove (13) and is inserted into the inserting hole (23); two positioning holes (15) are formed in the other inner side face of the upright post (12) along the length direction, each positioning hole (15) corresponds to the inserted rod (231), and one end of the inserted rod (231) penetrates through the limiting groove (13), the inserting hole (23) and the positioning hole (15) in sequence and then fixes the sliding block (2) on the inner wall of the channel (121).

4. The double ladder as claimed in claim 1, 2 or 3, wherein each upright post (12) is fixedly provided with a fixed seat (41) on the inner side surface, two fixed seats (41) of the upright frame (1) are rotatably provided with a rotating shaft (4), the rotating shafts (4) are respectively in transmission connection with the sliding blocks (2) through transmission mechanisms, and the rotating shafts (4) are fixedly provided with U-shaped frames (5); when the U-shaped frame (5) rotates clockwise around the rotating shaft (4) to the inner side surface of the vertical frame (1), the rotating shaft (4) drives the sliding block (2) to slide upwards through the transmission mechanism; when the U-shaped frame (5) rotates anticlockwise around the rotating shaft (4), the rotating shaft (4) drives the sliding block (2) to slide downwards through the transmission mechanism.

5. The herringbone ladder of claim 4, wherein the U-shaped frame (5) comprises a U-shaped rod (51) and two side rod sliding sleeves (52) which are parallel to each other, the upper ends of the two side rod sliding sleeves (52) are fixedly arranged on the rotating shaft (4), each side rod sliding sleeve (52) is internally provided with a mounting cavity (511), the bottom of the mounting cavity (511) is communicated with the lower end surfaces of the side rod sliding sleeves (52), the two ends of the U-shaped rod (51) are respectively in one-to-one correspondence with the two side rod sliding sleeves (52), and the end parts of the U-shaped rod (51) are slidably arranged in the corresponding side rod sliding sleeves (52); threaded holes (521) are formed in the side rod sliding sleeve (52), and a screw rod (522) is connected to the threaded holes (521) in a threaded mode.

6. A trestle ladder according to claim 4, characterized in that the transmission mechanism comprises a rack (24) fixed on the sliding block (2), the length direction of the rack (24) is consistent with the length direction of the upright post (12), and the rack (24) corresponds to the limiting groove (13); the two ends of the rotating shaft (4) are coaxially and fixedly provided with gears (42), each gear (42) corresponds to one limiting groove (13), one side face of each gear (42) extends into the corresponding limiting groove (13), and the gears (42) are meshed and connected with the racks (24).