TWI751057B - Climb the ladder - Google Patents

Abstract

A climbing ladder is suitable for use between a positioning surface and a ground. The climbing ladder includes two support groups, a plurality of pedal pieces and a safety limit unit. Each of the support groups has a first support rod and a second support rod, the first support rod and the second support rod respectively include a plurality of pivot parts arranged at intervals, and the pedal members respectively have four pivotable parts. a pivot part pivotally connected to the pivot part at the corresponding position of the support groups, the safety limiting unit includes a limit rod fixed to the first support rod or the second support rod of one of the support groups, and A stopper fixed to the second support rod of the support rod set or the first support rod. When the first support rods and the second support rods are separated, the stopper stops the limit rod, and the distance between the first support rod and the second support rod of each support group is kept constant to ensure that safety of use.

Description

ladder

The present invention relates to a climbing device, in particular to a climbing ladder.

Generally, buildings will be equipped with sun visors, lighting covers, etc., and manhole covers will be installed on the sun visors and lighting covers, and there will be ladders between the ground and the manhole covers to facilitate people to climb to the manhole covers via the ladders. , and after opening the manhole cover, climb to the top of the sun visor and lighting cover.

Most of the existing climbing ladders are directly fixed on a vertical wall, and a plurality of circular tubular pedals are welded between a pair of long poles. Leaning back is not ergonomic and dangerous when climbing high. Furthermore, when climbing to a high place, it is necessary to open the manhole cover, which increases the risk.

In order to solve the above problems, if the ladder is installed in an inclined shape, a large space will be occupied.

Therefore, the purpose of the present invention is to provide a climbing ladder that can improve the safety during climbing and can be folded in time to not occupy space.

Therefore, the climbing ladder of the present invention is suitable for use between a positioning surface and a ground, The climbing ladder includes two support groups, a plurality of pedal pieces and a safety limit unit. The support groups are arranged at intervals along a first axis, each support group has a first support rod, and a second axis perpendicular to the first axis is disposed on one side of the first support rod The second support rod, the first support rod and the second support rod respectively include a top end positioned relative to the positioning surface, a bottom end opposite to the top end, and most of the top end and the bottom end are arranged at intervals The pivot parts between the pedal pieces are pivotally connected between the support groups and have four pivot parts, and the pivot parts of each pedal piece are pivotally pivoted to the supports respectively. A set of pivoting parts at corresponding positions, the safety limiting unit includes a limit rod fixed to one of the first support rod and the second support rod of one of the support groups, and a first support rod fixed to the support rod group. A stopper for the other of the support rod and the second support rod; wherein, when the first support rod and the second support rod of the support groups are separated, the stopper stops the limit rod, and each support rod The distance between the first support rod and the second support rod of the group is kept fixed, the first support rod and the first support rod of the support group are approaching, and the stopper of the safety limit unit is far away from the the limit lever.

The effect of the present invention lies in that: when the first support rod and the second support rod of the support groups are separated by the setting of the safety limit unit, the stopper stops the limit rod, and the stopper of each support group The distance between the first support rod and the second support rod is kept fixed, which can ensure the stability of the support groups and the safety of stepping on the pedals.

1: Positioning surface

2: Ground

10: Positioning seat

11: Fixed plate

12: Connection board

13: Guide groove

131: Top

132: Bottom

133: middle section

20: Support Group

21: The first support rod

211: Top

212: Bottom

213: Pivot part

214: Guide pins

22: Second support rod

221: Top

222: Bottom

223: pivot part

30: Pedals

31: Ontology

32: Bolt shaft

321: Axis Pivot

322: Locking nut

40: Safety limit unit

41: Limit bar

411: Fixed segment

412: Stop segment

42: Stopper

X: the first axis

Y: the second axis

Other features and effects of the present invention will be described with reference to the embodiments of the drawings 1 is a schematic diagram of a three-dimensional installation of a first embodiment of a climbing ladder of the present invention; FIG. 2 is a partially enlarged perspective schematic diagram of the first embodiment; FIG. 3 is a schematic view of the first embodiment Figure 4 is a schematic side view of the first embodiment; Figure 5 is a sectional view along the line VV in Figure 4; Figure 6 is a folded perspective schematic view of the first embodiment; FIG. 7 is a schematic side view of FIG. 6; FIG. 8 is a three-dimensional installation schematic diagram of a second embodiment of the ladder of the present invention; FIG. 9 is a partially enlarged perspective view of the second embodiment; and FIG. 10 is the second embodiment. A folded schematic diagram of the embodiment.

Referring to FIGS. 1 to 4 , a first embodiment of the ladder of the present invention is suitable for use between a positioning surface 1 and a ground 2 . The ladder includes a pair of positioning seats 10 fixed on the positioning surface 1 , and two supporting groups. 20. A plurality of pedal members 30 and a safety limiting unit 40.

The cross-section of each positioning seat 10 perpendicular to the positioning surface 1 is L-shaped, and has a fixing plate 11 fixed on the positioning surface 1 , a connecting plate 12 intersecting and connecting to the fixing plate 11 , and a pair of In the guide grooves 13 of the connecting plates 12, each guide groove 13 has an upper end 131, a lower end 132 opposite to the upper end 131, and a middle section 133 connected between the upper end 131 and the lower end 132. 131 compared to the lower end 132 Approaching the positioning surface 1 , the upper end 131 and the lower end 132 are in the shape of a straight groove substantially parallel to the positioning surface 1 , and the middle section 133 extends away from the lower end 132 from the end connected with the upper end 131 With respect to the positioning surface 1 , the middle section 133 is in the shape of an inclined groove relative to the positioning surface 1 .

The support groups 20 are arranged at intervals along a first axis X, each support group 20 has a first support rod 21, and a second axis Y perpendicular to the first axis X is arranged on the first axis Y. A second support rod 22 on one side of the support rod 21, the first support rod 21 and the second support rod 22 respectively include a top end 211, 221 positioned relative to the positioning surface 1, a top end 211, 221 opposite to the top end 211, The bottom ends 212, 222 of the 221, and most of the pivot parts 213, 223 are disposed between the top ends 211, 221 and the bottom ends 212, 222 at intervals. The pivoting portions 213 and 223 are in the shape of perforations. The top ends 211 of the first support rods 21 are each locked with a guide pin 214 , and the guide pins 214 are slidably inserted into the corresponding guide grooves 13 .

Referring to FIG. 5 , the pedal members 30 are pivotally connected between the supporting groups 20 and include a main body 31 and two bolt shaft rods 32 passing through the main body 31 , each bolt shaft rod 32 has an extension The pivot portions 321 outside the body 31 and passing through the pivot portions 213 and 223, and the locking nuts 322 screwed to the pivot portions 321, the The pivot portions 321 are respectively pivotably connected to the pivot portions 213 and 223 at corresponding positions of the supporting groups 20 .

The safety limiting unit 40 includes a first fixed on one of the support groups 20 Two limiting rods 41 of the support rods 22 and a stopper 42 fixed to the first support rod 21 of the support rod set 20 . The limiting rod 41 in this embodiment is L-shaped, and has a fixed section 411 fixed on the second support rod 22 , and a fixed section 411 that is intersected and connected to the second support rod 22 toward the first support rod 22 . The stop section 412 of the support rod 21 is extended, and the limit rod 41 is close to the bottom end 222 of the second support rod 22 . The blocking member 42 in this embodiment is actually one of the locking nuts 322 , which is not provided otherwise. The blocking member 42 ′ is close to the bottom end 212 of the first support rod 21 of the support rod group 20 .

In order to further understand the functions produced by the cooperation of the various elements of the present invention, the technical means used, and the expected effects, the following descriptions will be given.

As shown in FIG. 1 , when the overall installation of the ladder of the present invention is completed, and the ladder stands obliquely between the positioning surface 1 and the ground 2 , the top ends 211 of the first support rods 21 are penetrated by the guide pins 214 . In the guide grooves 13 of the positioning bases 10 , the top ends 211 of the first support rods 21 are pivoted relative to the positioning bases 10 .

As shown in FIG. 1 and FIG. 4 , at this time, when the bottom ends 212 of the first support rods 21 abut the ground 2 , and an acute angle is formed between the support groups 20 and the ground 2 , the The guide pins 214 are located in the lower ends 132 of the guide grooves 13 , and the top surfaces of the main bodies 31 of the pedal members 30 are substantially parallel to the ground 2 , so that the user can step on it smoothly, and the user has high stability when climbing the ladder. Safer. And the stopper 42 (the locking nut 322 ) stops at the end of the stop section 412 of the limit rod 41 , and the first branch of each support group 20 The distance between the support rod 21 and the second support rod 22 is kept fixed, which can ensure the stability of the support groups 20 and the safety of stepping on the pedal members 30 .

In the above-mentioned use state and an acute angle is formed between the support groups 20 and the ground 2 , the installation position of the limit rod 41 relative to the stopper 42 can be measured and accurately controlled in advance, so that the support groups 20 can be In each use, the fixed angle with the ground 2 can be controlled, that is, the blocking member 42 (the locking nut 322 ) can block the resistance of the limiting rod 41 in each use. stop the end of the segment 412 and keep the distance between the first support rod 21 and the second support rod 22 of each support group 20 constant, which can ensure the stability of the support groups 20 and the safety of stepping on the pedal members 30 sex.

As shown in FIG. 6 and FIG. 7 , therefore, when the ladder is temporarily not in use, the operator can move the second support rods 22 farther from the positioning surface 1 upward and toward the position closer to the positioning surface 1 . The first support rods 21 move against each other, so that the pedals 30 are also pulled and rotated, and the distance between the first support rods 21 and the second support rods 22 becomes smaller, which can reduce the size of the ladder. overall volume. Next, the supporting group 20 is moved upward as a whole and the bottom ends 212 and 222 are moved toward the positioning surface 1 , and the guide pins 214 are located in the upper ends 131 of the guide grooves 13 . The main body 31 is inclined relative to the ground 2 , and at this time, the stopper 42 of the safety limiting unit 40 is away from the limiting rod 41 .

Therefore, when the first support rods 21 and the second support rods 22 of the support groups 20 are separated by the setting of the safety limiting unit 40 , the blocking member 42 stops against the resisting section of the limiting rod 41 . 412 ends so that the first support rod 21 of each support group 20 The distance from the second support rod 22 is kept constant, which can ensure the stability of the support groups 20 and the safety of stepping on the pedal members 30 . When the first support rods 21 and the second support rods 22 of the support groups 20 are approached and the bottom ends 212 and 222 are moved toward the positioning surface 1 , the overall volume and occupied space of the ladder can be reduced , quite practical and easy to use.

Referring to FIG. 8 to FIG. 10 , a second embodiment of the ladder according to the present invention is different from the first embodiment in that the limiting rod 41 ′ of the safety limiting unit 40 ′ is in an inverted L shape and has a fixed A fixing section 411 ′ of the first support rod 21 in one of the support groups 20 , and a stop section 412 ′ intersecting with the fixing section 411 ′ and extending from the first support rod 21 toward the second support rod 22 , the limiting rod 41 ′ approaches the top 211 of the first support rod 21 . The blocking member 42' is close to the top end 221 of the second support rod 22 of the support rod group 20.

The same purpose and effect as the first embodiment can also be achieved by using the ladder of the second embodiment.

To sum up, the ladder body of the present invention is simple in structure and easy to manufacture and assemble, so it can indeed achieve the purpose of the present invention.

However, the above are only examples of the present invention, and should not limit the scope of implementation of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the patent specification are still included in the scope of the present invention. within the scope of the invention patent.

1: Positioning surface

2: Ground

10: Positioning seat

11: Fixed plate

12: Connection board

13: Guide groove

132: Bottom

20: Support Group

21: The first support rod

211: Top

212: Bottom

22: Second support rod

221: Top

222: Bottom

30: Pedals

31: Ontology

322: Locking nut

40: Safety limit unit

41: Limit bar

42: Stopper

X: the first axis

Y: the second axis

Claims (5)

A climbing ladder suitable for use between a positioning surface and a ground, the climbing ladder comprising: Two support groups are arranged at intervals along a first axis, each support group has a first support rod, and a second support group disposed on one side of the first support rod along a second axis perpendicular to the first axis The second support rod, the first support rod and the second support rod respectively include a top end positioned relative to the positioning surface, a bottom end opposite to the top end, and most of the top end and the bottom end are arranged at intervals the pivot part between; Most of the pedal members are pivotally connected between the support groups and have four pivot portions, and the pivot portions of each pedal member are pivotally pivotally connected to the pivot portions at the corresponding positions of the support groups. ;and A safety limit unit includes a limit rod fixed to one of the first support rod and the second support rod of a support group, and a first support rod and the second support rod fixed to the support rod group A stop for the other of the support rods; wherein, When the first support rod and the second support rod of the support groups are separated, the stopper stops the limit rod, and the distance between the first support rod and the second support rod of each support group is kept constant, The first support rods of the support groups approach the first support rods, and the stopper of the safety limit unit is far away from the limit rod. The climbing ladder according to claim 1, wherein the limit rod of the safety limit unit is L-shaped, and has a fixed section fixed to the second support rod of one of the support groups, and a fixed section that intersects with the fixed section a stop segment extending from the second support rod toward the first support rod, the limit rod is close to the bottom end of the second support rod, and the stopper is close to the first support of the support rod set the bottom end of the rod. The climbing ladder according to claim 1, wherein the limit rod of the safety limit unit is an inverted L shape, and has a fixed section fixed to the first support rod of one of the support groups, and a connecting rod intersecting with the first support rod of one of the support groups. The fixing section and the stop section extending from the first support rod towards the second support rod, the limit rod is close to the top of the first support rod, the stopper is close to the second support of the support rod set top of the rod. The climbing ladder of claim 1 further comprises a pair of positioning seats fixed on the positioning surface, each positioning seat has a guide groove, each guide groove has an upper end, a lower end opposite to the upper end, and a Connected to the middle section between the upper end and the lower end, the upper end is closer to the positioning surface than the lower end, and the middle section gradually moves away from the positioning surface when extending from the end connected to the upper end toward the lower end. The climbing ladder according to claim 4, wherein the middle sections of the guide grooves of the positioning seats are in the shape of inclined grooves relative to the positioning surface.

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