TWI557310B - Can increase the stability of the safety of the ladder - Google Patents

Description

Safety ladder that can increase stability

The present invention provides a safety ladder capable of increasing the stabilizing effect, and more particularly, a safety ladder technology in which a top end has a telescopic extension and a bottom end has an increased bottom area, and a high stability and safety can increase the stability effect.

According to the current structure of folding safety ladders, such as the national announcement No. M488546 adjustable folding ladder structure, M449855 ladder telescopic device, M380989 ladder folding structure, M380990 safety ladder structure improved M375119 structural reinforcement A-shaped Patent ladder, M364764 aluminum ladder combination structure improvement, M330356 safety ladder structure improvement, I347999 safety ladder and its limit fixtures are all patent cases.

Although the above-mentioned safety ladder has a folding function, it can be folded without the convenience of occupying space when it is not used. However, when the construction is at a higher position, it must climb to the ladder or the topmost pedal. There is no design on the upper end that provides the user with leaning or holding, so that the body is easily out of balance, dangerous, and safe. Moreover, there is no tool or item hanging design on the upper end of the safety ladder, which makes it very inconvenient for the user to climb back and forth.

In addition, Announcement No. I347999 safety ladder and its limit fixture patent case, although extending the foot 23 at the bottom end of each vertical pole 211, to provide a larger bottom area to increase stability and avoid dumping. However, because the extension step 23 is a fixed structure, in addition to only one-way setting, the bottom area is limited and insufficient. When the safety ladder is not used, the extension ladder legs 23 cannot be folded at all, which hinders the aesthetics and the space and other shortcomings.

The inventors have intensively studied and improved in view of this, and have developed the present invention.

Therefore, the main object of the present invention is to provide a structure for a user to lean or hold when standing up to a higher or standing top to avoid loss of balance, stability, safety, and collapse. A safety ladder that increases the stability of space.

A second object of the present invention is to provide a safety ladder which can increase the bottom area, improve the use stability, and is easy to fold without occupying space and does not affect the aesthetics, thereby increasing the stabilizing effect.

The present invention provides a safety ladder capable of increasing a stabilizing effect, comprising at least: a safety ladder comprising at least a first ladder frame and a second ladder frame, the first ladder frame and the second ladder frame being at one end The pivoting block is fixed, each ladder frame has two poles spaced apart from each other and a plurality of pedals between the two vertical poles; and two telescopic members are respectively arranged on the outer side of the outer side of the first ladder frame or the second ladder frame The telescopic member comprises at least an inner tube and an outer tube disposed on the inner sleeve, the outer tube is fixed on the outer upper portion of the pole, and the outer wall is spaced apart from the plurality of positioning holes, and the lower end of the inner tube is provided with a card The elastic positioning member of any positioning hole of the outer tube is buckled, so that the inner tube has a length change and positioning, and an extension of the safety ladder is formed to form an extension.

Preferably, the top end of the inner tube is combined with a grip to facilitate gripping or hanging of tools and articles.

Preferably, each of the poles forms a recess with respect to one side of the pedal, and the plurality of pedals are equidistantly pivoted in the opposite recesses of the two poles, each pedal system comprising a first pedal and a second pedal, the first One pedal and one end of the second pedal are respectively pivoted in the opposite recesses of the two poles, and the other end is pivotally connected, so that when the two poles of the ladder frame are deployed, the first pedal and the second pedal can be linked and deployed. The horizontal connection is a pedal, and when the two vertical poles of the ladder frame are in abutment, the first pedal and the second pedal can be folded and stored in the recesses of the two poles by the pivoting end.

Preferably, each of the vertical rods is a rectangular rod, and each of the bottom ends of each of the vertical rods is provided with a movable foot block flush with the bottom surface at least at two corners, and each of the bottoms of the vertical rods is recessed with respect to the corners of the movable foot blocks. a slot portion, the movable leg block has an L shape, and has a short leg block portion and a long leg block portion. The short leg block portion and the groove portion are respectively provided with a coupling hole for a fixing member to pass through the activity. The foot block is pivoted to the pole to expand the bottom area of each pole by the movable foot blocks, and the side of the pole can be folded without occupying space when not in use.

Therefore, the present invention can increase the bottom area of each pole through the configuration of the two sides of the telescopic rod and the configuration of the folding movable foot pad, so as to provide the highest pedal of the standing safety ladder can be leaned or held, so as to be safer to use the safety ladder. More stable, to solve the many problems of the practice, and indeed has the economic efficiency of progress, so the present invention does provide a safe ladder for the safety ladder to effectively solve the novel technology is correct.

10‧‧‧Safety ladder

20‧‧‧First ladder

30‧‧‧Second ladder

21, 31‧‧‧ pole

211, 311‧‧‧ grooves

212, 312‧‧‧ slot

40‧‧‧Several pedals

41‧‧‧First pedal

42‧‧‧Second pedal

411‧‧‧ convex

421‧‧‧ recess

50‧‧‧Flexible parts

51‧‧‧Inside

52‧‧‧External management

53‧‧‧ grip

511‧‧‧Fixed holes

54‧‧‧Flexible positioning parts

541‧‧‧Elastic film

542‧‧‧ positioning convex

521‧‧‧ Combined with tabs

522‧‧‧ screws

523‧‧‧Positioning holes

60‧‧‧active foot block

61‧‧‧ Short leg block

62‧‧‧Long foot block

Figure 1 is a partially exploded perspective view of the present invention.

Figure 2 is a side elevational view of the present invention.

Figure 3 is a schematic cross-sectional view showing the combination of the inner and outer tubes of the present invention.

Fig. 4 is a perspective view showing the movable foot block of the present invention in close contact with the vertical pole and a partial exploded view.

Figure 5 is a schematic view showing the expansion of the movable foot block of the present invention to increase the bottom area.

Figure 6 is a schematic view of the entire safety ladder of the present invention.

Figure 7 is a schematic view showing the implementation of the telescopic rod of the present invention for grasping the top end user.

Referring to Figures 1-7, the safety ladder of the present invention can increase the stability effect, and at least includes: a safety ladder 10 including at least a first ladder frame 20 and a second ladder frame 30, the first ladder frame 20 and The second ladder frame 30 is pivotally assembled to each other at one end, and the first ladder frame 20 and the second ladder frame 30 are respectively disposed between the two vertical bars 21 and 31 and between the two vertical bars 21 and 31. The pedals 40 and 31 respectively form a recess 211, 311 on one side of the plurality of pedals 40, and the plurality of pedals 40 are arranged equidistantly between the two poles 21, 31, and each of the pedals 40 includes a first a pedal 41 and a second pedal 42 are respectively pivoted to the opposite recesses 211, 311 of the two uprights 21, 31, respectively, and the other end is pivotally connected, such as The pivotal ends of the first step 41 and the second step 42 are formed to form a convex portion 411 and a concave portion 421 which are mutually entangled. When not limited to the shape, the convex portion 411 and the concave portion 421 are oppositely disposed. The first hole 41 and the second step 42 can be linked and deployed horizontally when the two holes 21 and 31 of the ladder frame are deployed. A pedal is provided, and when the two uprights 21 and 31 of the ladder frame are in abutment, the first pedal 41 and the second pedal 42 can be folded and hidden by the butt end, and the two poles 21, 31 are opposite to the two recesses 211. And 311; and two telescopic members 50 are respectively arranged on the outer side of the two upper poles 21 (31) of the first ladder frame 20 or the second ladder frame 30, and are arranged in the figure. In the first ladder frame 20, two uprights 21, that is, a user climbing direction, the telescopic member 50 comprises at least an inner tube 51 and an outer tube 52 which are disposed inside, and the inner tube 51 is a rectangular tube body. The upper end is combined with a grip 53 for holding or a tool or an object. The lower end is provided with a fixing hole 511. The fixing hole 511 is disposed with an elastic positioning member 54. The elastic positioning member 54 has a V shape or an N shape. The elastic piece 541 and a positioning convex portion 542 of the combined elastic piece 541 protrude from the outer side of the inner tube 51 by the fixing hole 511; the outer tube 52 is a braided tube body through which the inner tube 51 can be inserted When the structure is not limited thereto, the upper and lower ends of the opening are respectively provided with a coupling tab 521 for fixing the outer tube 52 to the upper portion of the outer side wall of the upright 21 by a screw 522, the outer wall of the outer tube 51 A plurality of positioning holes 523 are defined in the interval, so that the positioning portion 542 of the inner tube 51 can be buckled to locate any positioning hole 523 of the outer tube 52, so that the inner tube 51 can be condensed to the outer tube 52 or protruded from the top of the safety ladder. And can be adjusted to adjust its length and positioning.

As shown in Figures 4 and 5, each of the uprights 21, 31 of the present invention is a rectangular rod, and the bottom ends of each of the uprights 21, 31 are recessed at least at two corners with a groove portion 212, 312, as shown in the figure. Each of the four corners is recessed with a groove portion 212, 312. Each of the plurality of groove portions 212, 312 is combined with a movable leg block 60. The movable leg block 60 is substantially L-shaped and has a short leg block portion 61 and a The long leg block portion 62, each of the short leg block portions 61 and the respective groove portions 212, 312 are provided with a coupling hole for a fixing member to be pierced, so that each movable leg block 60 is pivoted to the uprights 21, 31 for unfolding Each movable leg block 60 increases the bottom area of each of the uprights 21 and 31 to improve the stability of use, and each movable leg block 60 can be folded and abutted against the side of each of the uprights 21 and 31 when not in use. Space and meet the aesthetic needs.

From the above structure, the present invention has at least the following advantages:

1. When the safety ladder is deployed, the extension end of the protruding safety ladder can be extracted from the inner tube 51 of the telescopic rod 50 disposed on the outer side of the two poles 21 to form an extension section for the user to climb the upper or the standing top position. It can be relied on or held to effectively avoid imbalance of the body and has high stability and safety.

2. The top end of the inner tube 51 which protrudes from the top of the safety ladder to form an extended section is combined with a grip 53 for the user to hold, and can also be hung by tools or articles to avoid the inconvenience of climbing back and forth. As shown in Figure 7.

3. When the safety ladder of the present invention is folded, the inner tube 51 can be simultaneously folded into the outer tube 52 without occupying space.

4. The pedals 40 of the present invention are pivotally connected by a first pedal 41 and a second pedal 42 which are pivotally bent. When the safety ladder is folded, the first pedal 41 and the second pedal 42 can be folded and received by the butt end. Concealed in the two vertical poles 21, 31 relative to the two recesses 211, 311, so that the spacers 21, 31 can be placed close to each other, effectively reducing the folding volume of the entire safety ladder, and the storage does not occupy space, such as the sixth The figure shows.

5. Each movable pole 21, 31 has a movable foot block 60 at each corner of the bottom end of each of the vertical poles 21, 31, and the bottom area of each vertical pole 21, 31 can be increased by expanding each movable foot block 60, so as to improve the use stability. When not in use, each movable foot block 60 can be folded and folded against the side edges of each of the vertical poles 21, 31, so as to achieve the effect of not occupying space and having good aesthetics.

In summary, the present invention has completely broken through the reformation of the use of safety ladders without extensions for leaning or holding, the use of high risk of safety is not good, and the increase of the bottom area limited stability and can not be folded to occupy the space aesthetics is not good Many shortcomings are a high-invention in the technical concept, which should meet the requirements of the patent application, and apply in accordance with the law. However, the above description is only a preferred embodiment of the present invention, and cannot be limited thereto. The scope of the present invention, that is, the equivalent variations and modifications of the scope of the present invention should still be within the scope of the present invention.

10‧‧‧Safety ladder

20‧‧‧First ladder

30‧‧‧Second ladder

21, 31‧‧‧ pole

211, 311‧‧‧ grooves

212, 312‧‧‧ slot

40‧‧‧Several pedals

41‧‧‧First pedal

42‧‧‧Second pedal

411‧‧‧ convex

421‧‧‧ recess

50‧‧‧Flexible parts

51‧‧‧Inside

52‧‧‧External management

53‧‧‧ grip

511‧‧‧Fixed holes

54‧‧‧Flexible positioning parts

521‧‧‧ Combined with tabs

522‧‧‧ screws

523‧‧‧Positioning holes

60‧‧‧active foot block

Claims (6)

A safety ladder capable of increasing a stabilizing effect, comprising at least: a safety ladder comprising at least a first ladder frame and a second ladder frame, wherein the first ladder frame and the second ladder frame are pivotally fixed to each other at one end, Each of the ladder frames has two poles spaced apart from each other and a plurality of pedals between the two poles; and two telescopic members are respectively disposed on the outer upper sides of the two ladders of the first ladder frame or the second ladder frame, the telescopic members The utility model comprises at least an inner tube and an outer tube, wherein the outer tube is a braided tube body, and the upper and lower ends of the opening are respectively convexly provided with a coupling piece for locking the outer tube by a screw, the outer tube The utility model is fixed on the upper portion of the outer side wall of the pole, and the outer wall is spaced apart from the plurality of positioning holes, the inner tube is a tubular body having a rectangular cross section corresponding to the outer tube, and the lower end of the inner tube is provided with a buckleable outer tube The elastic positioning member of any positioning hole has the inner tube having a length change and positioning, and protrudes from the top of the safety ladder to form an extension. The safety ladder according to claim 1, wherein the lower end of the inner tube is provided with a fixing hole, and the elastic positioning member is disposed in the inner tube, and comprises a V-shaped or N-shaped elastic piece and a combined elastic piece. The positioning convex portion protrudes from the outer side of the inner tube by the fixing hole, so that the inner tube can be positioned through any positioning hole of the outer tube of the positioning convex portion when the inner tube is telescopically adjusted. The safety ladder according to claim 1, wherein each of the poles forms a groove with respect to one side of the pedal, and the plurality of pedals are equidistantly pivoted in the opposite grooves of the two poles, and each pedal system comprises a first pedal and a second pedal, the first pedal and the second pedal are respectively pivoted in the opposite grooves of the two poles, and the other end is pivotally connected to make the ladders of the ladders expand. , each of the first pedal and the second pedal can be connected The movable horizontal connection is a pedal, and when the two vertical poles of the ladder frame are in abutment, the first pedal and the second pedal can be folded and stored in the recesses of the two poles by the pivoting end. The safety ladder according to any one of claims 1 to 3, wherein the first pedal and the second pedal pivot end can form a convex and concave structure that is entangled with each other, the convex portion and the concave portion. The fixing hole is oppositely provided for a fixing member to be pivoted. The safety ladder according to claim 4, wherein each of the poles is a rectangular rod, and each of the bottom ends of each pole is provided with an active foot block flush with the bottom surface at least at two corners, and each movable foot block It can be expanded to increase the bottom area of each pole, and can be folded away from the side of the pole without occupying space when not in use. The safety ladder according to claim 5, wherein the bottom of each pole is recessed with respect to each of the corners of each movable foot block, and the movable foot block is L-shaped and has a short leg block. And a long leg block portion, the short leg block portion and the groove portion are provided with a coupling hole for a fixing member to be pivoted to fix the movable leg block to the upright bar.