EP3112579A1 - A ladder - Google Patents
A ladder Download PDFInfo
- Publication number
- EP3112579A1 EP3112579A1 EP15174463.8A EP15174463A EP3112579A1 EP 3112579 A1 EP3112579 A1 EP 3112579A1 EP 15174463 A EP15174463 A EP 15174463A EP 3112579 A1 EP3112579 A1 EP 3112579A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ladder
- overlapping
- leg supporting
- overlapping portion
- side member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000004224 protection Effects 0.000 claims abstract description 38
- 125000006850 spacer group Chemical group 0.000 claims abstract description 20
- 230000009194 climbing Effects 0.000 claims abstract description 12
- 239000004033 plastic Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 description 11
- 210000002105 tongue Anatomy 0.000 description 8
- 238000005553 drilling Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/08—Special construction of longitudinal members, or rungs or other treads
- E06C7/082—Connections between rungs or treads and longitudinal members
- E06C7/087—Connections between rungs or treads and longitudinal members with a connecting piece installed around the rung
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/14—Ladders capable of standing by themselves
- E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
- E06C1/20—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/08—Special construction of longitudinal members, or rungs or other treads
- E06C7/081—Rungs or other treads comprising anti-slip features
Definitions
- the present invention relates to a ladder comprising two side members and steps arranged between said two side members.
- a ladder is usually provided with at least with two side members with rungs or steps connected there between.
- the user stands on the rungs, but may also use a rung or a step, which is positioned above the step or rung the user is standing on too support himself by resting a leg thereon.
- the ends of the rungs if they protrude over the side members may be provided with a plastic or rubber cap in order to cover sharp edges of the rungs.
- the cap prevents a user from hurting himself on the rungs, and they may also protect the surroundings from being unnecessary scratched when, for example, carrying the ladder around.
- the caps are usually arranged on the ends of the rungs, and the cap is arranged and pressed between the rung and one of the side members, since the rungs are attached to the side member in the longitudinal direction of the rung.
- EP1052366 discloses a stepladder or ladder comprising an end cap for fastening a step and adapted in particular to be fastened on uprights for step surface uprights of the stepladder or ladder
- the connection may overtime get loose, if for the material of the cap breaks or relaxes.
- the object of the present invention is to provide a ladder that overcomes the above issues.
- the invention is based on the insight that by providing a space between a leg supporting portion of the step and the side members a side step protection can be arranged to the ladder without being pressed between the two parts, in order to protect the user from portions of the step which protrudes over the side members.
- the invention relates to a ladder comprising two side members and steps arranged between said two side members, said two side members each comprises a front surface, which faces a user when climbing the ladder, and at least one of said steps comprises a stepping portion and a leg supporting portion, wherein said leg supporting portion is at least partly overlapping one of said front surfaces of at least one of said side members with an overlapping portion, said ladder further comprises
- said leg supporting portion comprises an essentially flat outer surface, which faces the user when climbing the ladder, which flat outer surface extends partially along said side members.
- the leg supporting portion preferably has a width which is 10+/-2 cm, more preferably 4+/-2cm. The larger the width of the leg supporting portion is the more comfortable the leg supporting portion may be for the user, since the user may support his leg on the leg supporting portion, when standing on a step arranged below, during use.
- said spacer is a protrusion protruding from said overlapping of said leg supporting portion.
- the spacer By having the spacer being a protrusion it can be made in the same manufacturing step as the leg supporting portion.
- the protrusion may extend over the whole length of the leg supporting portion or only in the area of the overlapping portion of the leg supporting portion.
- the distance of the space between said front surface and said overlapping portion is larger than the thickness of said holding portion, which is being arranged in said space. This way, the holding portion is not pressed between the front surface and the overlapping portion. If the side step protection is made of plastic and the material is being pressed, the material relaxes over time due to the relaxation behaviour of the material. Relaxation being the phenomena that a strain on a body held constant, results in the stresses acting on the same body decreasing with time.
- said at least one holding portion is a tongue protruding from said leg support covering portion.
- said side step protection is made of plastic or rubber.
- said side step protection further comprises a step covering portion, which surrounds at least a part of said stepping portion.
- a step covering portion By having a step covering portion the end of the stepping portion may be covered. A possible gap between the stepping portion and the side member may be prevented by the step covering portion.
- said at least one step which comprises a stepping portion and a leg supporting portion, further comprises a rear portion with at least one overlapping portion, which at least partly overlaps a rear surface of said side member, said rear surface being essentially opposite arranged to said front surface.
- the step itself gets be more stable.
- the rear portion may be arranged in an angle to the stepping portion opposite the leg supporting portion.
- the overlapping portion may connect the rear portion to the side member, in order to secure the step further to the side members.
- said ladder further comprises at least a second spacer arranged between said overlapping portion of said rear portion and said rear surface in order to create a space between said rear surface and said overlapping portion
- said side step protection further comprises a rear covering portion and at least one second holding portion, wherein said rear covering portion being at least partly arranged around said overlapping portion of said rear portion and said at least one second holding portion being arranged in said space between said rear surface and said overlapping portion.
- the rear covering portion and said holding portion can be used to hold the side step protection on the step, in an easy way before they together are mounted to the side member.
- the spacer creates a distance to said rear portion of the side member, such that the holding portion can be arranged in the space between said rear surface and said overlapping portion.
- the spacer may be a protrusion protruding from said overlapping portion of said rear portion. The protrusion may extend over the whole length of the rear portion or only in the area of the overlapping portion of the rear portion.
- said ladder further comprises at least one fastening element, which connects said overlapping portion of said leg supporting portion with said side member.
- the overlapping portions of the leg supporting portion can be used in order to fasten the step on the side members. This is a more simple way to connect the step to the side members than connecting the step to the side members through the side member in the longitudinal direction of the step as disclosed in prior art.
- said ladder further comprises at least one fastening element, which connects said overlapping portion of said rear portion with said side member. This way the step is further secured to the side member in an easy way.
- said fastening element is a screw which is screwed into said side member.
- the screw may be a self-drilling or self-tapping screw, for example a FDS screw from EJOT.
- the side members may comprise a hole or holes, threaded or without a thread into which a screw may be fixed.
- said fastening element is a rivet.
- said side step protection comprises at least one opening, which at least partly surrounds said at least one fastening element, such that said side step protection is out of contact with said fastening element.
- the opening prevents the side step protection to be in contact with the fastening element. If the side step protection is out of contact with the fastening element it cannot be pressed between the fastening element and the leg supporting portion.
- the side step protection is made of plastic and the material is being pressed, the material relaxes over time due to the relaxation behaviour of the material. Relaxation being the phenomena that a strain on a body held constant, results in the stresses acting on the same body decreasing with time. The connection between the step and the side member would loosen after a time. The same applies if the side step protection would be made of rubber.
- the distance of the space between said rear surface of said side member and said overlapping portion of said rear portion is larger than the thickness of said second holding portion, which is being arranged in said space. This way, the holding portions are not pressed between the rear surface and the overlapping portion. If the side step protection is made of plastic and the material is being pressed, the material relaxes over time due to the relaxation behaviour of the material. Relaxation being the phenomena that a strain on a body held constant, results in the stresses acting on the same body decreasing with time.
- said second holding portion of said rear portion covering portion is a tongue protruding from said rear covering portion.
- the function of the second spacer is the same as for the first spacer, i.e. to provide a space between said rear surface and said overlapping portion, into which a second holding portion may be arranged.
- said two side members are a side member pair and said ladder further comprises a second side member pair, said first and second side member pairs are articulated arranged to each other.
- said ladder is in particular a folding ladder, a stepladder or a stand-alone ladder.
- Fig. 1 shows a folding ladder 1 comprising two side member pairs 20, 21, which are pivotably connected to each other.
- the ladder 1 further comprises a pivotable step platform 30 to stand on, and a handle 31 for the user to hold on or to rest his body on when standing on the step platform 30.
- the second side member pair 21 comprises two rear side members 50, which are supported by a support member 51.
- the first side member pair 20 comprises two front side members 2, which will be referred to as side members 2, and two steps 3 arranged between said two side members 2.
- On each side of each step is a side step protection 10 arranged, which surrounds the edges of the step in order to prevent the user from hurting himself on the edge.
- the two side members 2 each comprises a front surface 4, which faces a user when climbing the ladder.
- Each two side member 2 also comprises a back surface 15, which faces away from the user when climbing the ladder.
- the front surface 4 and the back surface 15 are arranged opposite each other.
- the two side members 2 are exemplified as elongated rectangular shaped tubes.
- the two side members 2 may however have a U-shaped, rounded or any other suitable shape.
- Figs. 2 - 6 shows a portion of the first side member pair 20 in Fig. 1 from different directions and with different parts removed from the other parts in order to see how the ladder is designed and assembled, hence Figs. 1-6 will be described together.
- Each step 3 comprises a stepping portion 5, a leg supporting portion 6 and a rear portion 14.
- the steps 3 may be made by a metal plate bent and cut out to the desired shape, or several pieces connected together or it may be extruded.
- the stepping portion 5 is the part of the step which the user will place his foot on when climbing the ladder.
- the stepping portion 5 is exemplified as being a flat surface, may however have a curved shape or any other suitable shape which accomplish a surface for the user to stand on.
- the stepping portion 5 extends between the two side members 2 and it has a width, which is larger than the distance between the front surface 4 and the back surface 15 of the side members, i.e. it extends beyond the side member 2, away from the user when climbing the ladder. This is in order to get a larger stepping surface for the user.
- the width of the stepping portion is not limited to be wider than the side member 2, it may be shorter or essentially the same.
- the stepping portion 5 is preferably arranged to the side members 2 such that it is essentially parallel with the surface the ladder 1 is adapted to stand on during use, for example a floor.
- the leg supporting portion 6 extends along the stepping portion 5 and it comprises two side portions, i.e. two overlapping portions 7, on each side (see Fig. 2 , where the side step protections 10 and the side members 2 are removed from the step 3).
- the overlapping portions 7 overlap the front surface 4 of the side members 2.
- the surface of the leg supporting portion 6, which is facing the front surface 4 of the side members 2 are provided with protrusions 8.
- the protrusions extend along the longitudinal direction of the leg supporting portion 6. Alternatively, the protrusions may only be in the area of the overlapping portion 7, which also is a connecting portion 7.
- the protrusions 8 are spacers 8, which create a space 9 between the front surface 4 and the overlapping portion 7 (see Fig. 5 ). Alternatively, a separate spacer or several separate spacers (not shown) may be arranged between the front surface 4 and the overlapping portion 7.
- the leg supporting portion 6 is essentially flat and it extends from the stepping portion 5 at an angle, such that the leg supporting portion 6 extends parallel with the front surface 4 of the side members 2.
- the leg supporting portion 6 preferably has a width D3, which preferably is 10+/-2, more preferably 4+/-2cm. The larger the width of the leg supporting portion 6 is the more comfortable the leg supporting portion is for the user, since the user may support his leg on the leg supporting portion 6, when standing on a step arranged below.
- the rear portion 14 is facing away from the user when climbing the ladder.
- the rear portion 14 extends along the stepping portion 3 and it comprises two overlapping portion 16 on each side of the step (see Fig. 2 , where the side step protections 10 and the side members 2 are exploded from the step 3).
- the overlapping portion 16 of the rear portion 14 overlaps the rear surface 15 of the side members 2.
- the surface of the rear portion 14, which is facing the rear surface 15 of the side members 2 are provided with protrusions 26, which extends along the extension of the rear portion 14.
- the protrusions 26 may only be in the area of the overlapping portions 16 of the rear portion 14.
- the protrusions 26 are spacers 26 which create a space 17 between the rear surface 15 and the overlapping portion 16 of the rear portion 14 (see Fig. 5 ).
- a separate spacer (not shown) may be arranged between the rear surface 15 and the overlapping portion 16 of the rear portion 14.
- the step 3 is secured to the side members 2 by fasteners 27a, 27b.
- the fasteners 27a, 27b are here exemplified as screws, may however be any other suitable fastener, such as rivets, clips etc.
- Each screw 27a, 27b may be a self-drilling or self-tapping screw, for example a FDS screw from EJOT.
- the side members 2 may comprise a threaded hole into which the screw can engage (not shown).
- the leg supporting portion 6 comprises an opening 22 in each overlapping portion 7 (see Fig. 2 ), through which the screw 27a is inserted before it threadedly engages with the side member 2. If a self-drilling screw or self-tapping screw is used, the screw can make the hole instead of having an opening 22 in the overlapping portion 7.
- the screw 27a, 27b is here exemplified as a self-drilling screw comprising a screw head 28a, 28b.
- the rear portion 14 is also connected to the side members 2 in the same way, however with two screws 27b.
- the side step protection 10 comprises a leg support covering portion 11, a step covering portion 13 and a rear covering portion 18.
- the side step protection 10 is made of a plastic. Alternatively, it may be made of rubber.
- the leg support covering portion 11 comprises a front portion 30, which covers the area of the overlapping portion 7, which faces the user when climbing the ladder.
- a side portion 31 is arranged to the front portion 30 and from the side portion 31 two holding portions 12 protrudes.
- the holding portions 12 are tongues.
- the holding portions 12 overlap the front portion 30 at a distance, which allows the leg supporting portion 6 to be arranged between the front portion 30 and the holding portions 12. The distance may be such that the overlapping portion 7 of the leg supporting portion 6 is pressed between the front portion 30 and the holding portions 12.
- the thickness D2 (see Fig. 6 ) of the holding portions 12, i.e. the tongues are thinner than the distance D1 (see Fig. 5 ) between the overlapping portion 7 and the front surface 4 of the side member 2.
- the holding portions 12 are arranged in the area where no protrusions, i.e. spacers are arranged.
- the holding portions 12 are also so arranged that they are out of contact with the fastener 27a.
- the front portion 30 of the leg support covering portion 11 further comprises an opening 32.
- the screw head 28a is placed within the opening 32, so that the screw head 28a abuts the leg supporting portion 6 and presses the protrusions 8 against the front portion 4 of the side member 2, without being in contact with the side step protection 10.
- the leg support covering portion 11 is arranged on the leg supporting portion 6, without being pressed between the screw head and the side member 2.
- the step covering portion 13 is connected to the leg support covering portion 11 and follows the outer contour of the end of the stepping portion 5. That is, it covers the outer edge of the end of the stepping portion 5.
- the step covering portion 13 also comprises tongues 38 (see Fig. 6 ), which overlaps the step covering portion 13.
- the stepping portion 5 is arranged between the step covering portion 13 and the tongues 38.
- Opposite arranged to the leg support covering portion 11 and connected to the step covering portion 13 is the rear covering portion 18.
- the leg support covering portion 11, the step covering portion 13 and the rear covering portion 18 are further connected to each other by a wall 29.
- the wall 29 protrudes from the step covering portion 13, which connects the leg support covering portion 11 and the rear covering portion 18.
- the rear covering portion 18 comprises a back portion 33, which covers the area of the overlapping portion 16 which faces away from the user when climbing the ladder.
- the wall 29 further connects the leg support covering portion 11 and the rear covering portion 18 underneath the step 3.
- the wall 29 comprises an opening 39 in order to reduce the material, however the opening 39 is not necessary for the function.
- a side portion 34 is arranged to the back portion 33 of the rear covering portion 18. From the side portion 34 two holding portions 19 protrudes.
- the holding portions 19 are tongues.
- the holding portions 19 overlap the back portion 33 of the rear covering portion 18 at a distance, which allows the rear portion 14 of the step 3 to be arranged between the back portion 33 and the holding portions 19.
- the distance may be such that the overlapping portion 16 of the rear portion 14 is pressed between the back portion 33 and the holding portions 19 of the rear covering portion.
- the thickness of the holding portions D2' (see Fig. 6 ), i.e. the tongues, are thinner than the distance D1' (see Fig. 5 ) between the overlapping portion 16 and the rear surface 15 of the side member 2.
- the holding portions 19 are arranged in the area where no protrusions are arranged, i.e. where no spacers are arranged.
- the holding portions 19 of the rear covering portion 18 are also so arranged that they are out of contact with the fasteners 27b which protrudes through openings 22 in the overlapping portion 16 of the rear portion 14.
- the back portion 33 of the rear covering portion 18 further comprises two openings 35.
- the screw heads 28b are placed within each opening 35, so that the screw heads 28b abuts the rear portion 14 and presses the protrusions 26 against the side members 2, without being in contact with the side step protection 10.
- the ladder described above is a folding ladder.
- the invention is not limited to a folding ladder. Any other stepladder, stand-alone ladder or leaning ladder may have same design as the first side member pair 20, i.e. two side members 2 and two steps 3 arranged between said two side members 2 and side step protections as described in connection with the Figs. 1-6 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
said two side members (2) each comprises a front surface (4), which faces a user when climbing the ladder, and
at least one of said steps (3) comprises a stepping portion (5) and a leg supporting portion (6), wherein said leg supporting portion (6) is at least partly overlapping one of said front surfaces (4) of at least one of said side members (2) with an overlapping portion (7),
said ladder (1) further comprises
- at least one spacer (8) arranged between said overlapping portion (7) of said leg supporting portion (6) and said front surface (4) in order to create a space (9) between said front surface (4) and said overlapping portion (7), and
- a side step protection (10) comprising a leg support covering portion (11) and at least one holding portion (12), wherein said leg support covering portion (11) being at least partly arranged around said overlapping portion (7) of said leg supporting portion (6) and said at least one holding portion (12) being arranged in said space (9).
Description
- The present invention relates to a ladder comprising two side members and steps arranged between said two side members.
- A ladder is usually provided with at least with two side members with rungs or steps connected there between. The user stands on the rungs, but may also use a rung or a step, which is positioned above the step or rung the user is standing on too support himself by resting a leg thereon. The ends of the rungs if they protrude over the side members may be provided with a plastic or rubber cap in order to cover sharp edges of the rungs. The cap prevents a user from hurting himself on the rungs, and they may also protect the surroundings from being unnecessary scratched when, for example, carrying the ladder around. The caps are usually arranged on the ends of the rungs, and the cap is arranged and pressed between the rung and one of the side members, since the rungs are attached to the side member in the longitudinal direction of the rung.
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EP1052366 discloses a stepladder or ladder comprising an end cap for fastening a step and adapted in particular to be fastened on uprights for step surface uprights of the stepladder or ladder - Since these caps are pressed between the rung and a side member by the rung/side member connection, for example a screw, the connection may overtime get loose, if for the material of the cap breaks or relaxes.
- Hence, there is a need for a ladder having a cap which does not influence the connection between the step and the side member.
- The object of the present invention is to provide a ladder that overcomes the above issues.
- The invention is based on the insight that by providing a space between a leg supporting portion of the step and the side members a side step protection can be arranged to the ladder without being pressed between the two parts, in order to protect the user from portions of the step which protrudes over the side members.
- The invention relates to a ladder comprising two side members and steps arranged between said two side members,
said two side members each comprises a front surface, which faces a user when climbing the ladder, and
at least one of said steps comprises a stepping portion and a leg supporting portion, wherein said leg supporting portion is at least partly overlapping one of said front surfaces of at least one of said side members with an overlapping portion, said ladder further comprises - at least one spacer arranged between said overlapping portion of said leg supporting portion and said front surface in order to create a space between said front surface and said overlapping portion, and
- a side step protection comprising a leg support covering portion and at least one holding portion, wherein said leg support covering portion being at least partly arranged around said overlapping portion of said leg supporting portion and said at least one holding portion being arranged in said space.
- According to at least one exemplary embodiment said leg supporting portion comprises an essentially flat outer surface, which faces the user when climbing the ladder, which flat outer surface extends partially along said side members. The leg supporting portion preferably has a width which is 10+/-2 cm, more preferably 4+/-2cm. The larger the width of the leg supporting portion is the more comfortable the leg supporting portion may be for the user, since the user may support his leg on the leg supporting portion, when standing on a step arranged below, during use.
- According to at least one exemplary embodiment said spacer is a protrusion protruding from said overlapping of said leg supporting portion. By having the spacer being a protrusion it can be made in the same manufacturing step as the leg supporting portion. The protrusion may extend over the whole length of the leg supporting portion or only in the area of the overlapping portion of the leg supporting portion.
- According to at least one exemplary embodiment the distance of the space between said front surface and said overlapping portion is larger than the thickness of said holding portion, which is being arranged in said space. This way, the holding portion is not pressed between the front surface and the overlapping portion. If the side step protection is made of plastic and the material is being pressed, the material relaxes over time due to the relaxation behaviour of the material. Relaxation being the phenomena that a strain on a body held constant, results in the stresses acting on the same body decreasing with time.
- According to at least one exemplary embodiment said at least one holding portion is a tongue protruding from said leg support covering portion.
- According to at least one exemplary embodiment said side step protection is made of plastic or rubber.
- According to at least one exemplary embodiment said side step protection further comprises a step covering portion, which surrounds at least a part of said stepping portion. By having a step covering portion the end of the stepping portion may be covered. A possible gap between the stepping portion and the side member may be prevented by the step covering portion.
- According to at least one exemplary embodiment said at least one step, which comprises a stepping portion and a leg supporting portion, further comprises a rear portion with at least one overlapping portion, which at least partly overlaps a rear surface of said side member, said rear surface being essentially opposite arranged to said front surface. By having a rear portion, the step itself gets be more stable. The rear portion may be arranged in an angle to the stepping portion opposite the leg supporting portion. The overlapping portion may connect the rear portion to the side member, in order to secure the step further to the side members.
- According to at least one exemplary embodiment said ladder further comprises at least a second spacer arranged between said overlapping portion of said rear portion and said rear surface in order to create a space between said rear surface and said overlapping portion, and said side step protection further comprises a rear covering portion and at least one second holding portion, wherein said rear covering portion being at least partly arranged around said overlapping portion of said rear portion and said at least one second holding portion being arranged in said space between said rear surface and said overlapping portion. By having a rear covering portion, which is arranged at least partly around the overlapping portion, the user may be protected from hurting herself/himself on the sharp edges of overlapping portion of the rear covering portion. The overlapping portion may be used to attach the step to one of the side member in an easy way. The rear covering portion and said holding portion can be used to hold the side step protection on the step, in an easy way before they together are mounted to the side member. The spacer creates a distance to said rear portion of the side member, such that the holding portion can be arranged in the space between said rear surface and said overlapping portion. The spacer may be a protrusion protruding from said overlapping portion of said rear portion. The protrusion may extend over the whole length of the rear portion or only in the area of the overlapping portion of the rear portion.
- According to at least one exemplary embodiment said ladder further comprises at least one fastening element, which connects said overlapping portion of said leg supporting portion with said side member. The overlapping portions of the leg supporting portion can be used in order to fasten the step on the side members. This is a more simple way to connect the step to the side members than connecting the step to the side members through the side member in the longitudinal direction of the step as disclosed in prior art.
- According to at least one exemplary embodiment said ladder further comprises at least one fastening element, which connects said overlapping portion of said rear portion with said side member. This way the step is further secured to the side member in an easy way.
- According to at least one exemplary embodiment said fastening element is a screw which is screwed into said side member. The screw may be a self-drilling or self-tapping screw, for example a FDS screw from EJOT. Alternatively, the side members may comprise a hole or holes, threaded or without a thread into which a screw may be fixed.
- According to at least one exemplary embodiment wherein said fastening element is a rivet.
- According to at least one exemplary embodiment said side step protection comprises at least one opening, which at least partly surrounds said at least one fastening element, such that said side step protection is out of contact with said fastening element. The opening prevents the side step protection to be in contact with the fastening element. If the side step protection is out of contact with the fastening element it cannot be pressed between the fastening element and the leg supporting portion.
- If the side step protection is made of plastic and the material is being pressed, the material relaxes over time due to the relaxation behaviour of the material. Relaxation being the phenomena that a strain on a body held constant, results in the stresses acting on the same body decreasing with time. The connection between the step and the side member would loosen after a time. The same applies if the side step protection would be made of rubber.
- According to at least one exemplary embodiment the distance of the space between said rear surface of said side member and said overlapping portion of said rear portion is larger than the thickness of said second holding portion, which is being arranged in said space. This way, the holding portions are not pressed between the rear surface and the overlapping portion. If the side step protection is made of plastic and the material is being pressed, the material relaxes over time due to the relaxation behaviour of the material. Relaxation being the phenomena that a strain on a body held constant, results in the stresses acting on the same body decreasing with time.
- According to at least one exemplary embodiment said second holding portion of said rear portion covering portion is a tongue protruding from said rear covering portion.
- The function of the second spacer is the same as for the first spacer, i.e. to provide a space between said rear surface and said overlapping portion, into which a second holding portion may be arranged.
- According to at least one exemplary embodiment wherein said two side members are a side member pair and said ladder further comprises a second side member pair, said first and second side member pairs are articulated arranged to each other.
- According to at least one exemplary embodiment said ladder is in particular a folding ladder, a stepladder or a stand-alone ladder.
- Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [element, device, component, means, step, etc]" are to be interpreted openly as referring to at least one instance of said element, device, component, means, step, etc., unless explicitly stated otherwise.
- Other objectives, features and advantages of the present invention will appear from the following detailed disclosure, as well as from the drawings.
- The above, as well as additional objects, features and advantages of the present invention, will be better understood through the following illustrative and non-limiting detailed description of exemplary embodiments of the present invention, with reference to the appended drawings, where the same reference numerals will be used for similar elements, wherein:
-
Fig. 1 shows a ladder comprising side step protections in perspective and according to an embodiment of the invention, said ladder comprises a first and a second side member pair. -
Fig. 2 shows an exploded view of the first side member pair inFig. 1 . -
Fig. 3 shows a part of the first side member pair inFig. 2 from behind and in perspective with the side step protection arranged on the step. -
Fig. 4 shows a part of the first side member pair inFig. 2 from the front and in perspective seen from a direction towards the step, with the side step protection arranged on the step. -
Fig. 5 shows a part of the first side member pair inFig. 2 from the side with the step arranged on one of the side members and with the side step protection exploded from the rest. -
Fig. 6 shows a part of the first side member pair inFig. 2 from the front and in perspective seen from a direction towards the side member and with the side step protection in a second view. - All the figures are highly schematic, not necessarily to scale, and they show only parts which are necessary in order to elucidate the invention, other parts being omitted or merely suggested.
- An embodiment of the invention will be described in more detail in the following with reference to the accompanying drawings.
-
Fig. 1 shows afolding ladder 1 comprising two side member pairs 20, 21, which are pivotably connected to each other. This can be made in different ways, which are known for the person skilled in the art. Theladder 1 further comprises apivotable step platform 30 to stand on, and ahandle 31 for the user to hold on or to rest his body on when standing on thestep platform 30. The secondside member pair 21 comprises tworear side members 50, which are supported by asupport member 51. The firstside member pair 20 comprises twofront side members 2, which will be referred to asside members 2, and twosteps 3 arranged between said twoside members 2. On each side of each step is aside step protection 10 arranged, which surrounds the edges of the step in order to prevent the user from hurting himself on the edge. The twoside members 2 each comprises afront surface 4, which faces a user when climbing the ladder. Each twoside member 2 also comprises aback surface 15, which faces away from the user when climbing the ladder. Thefront surface 4 and theback surface 15 are arranged opposite each other. The twoside members 2 are exemplified as elongated rectangular shaped tubes. The twoside members 2 may however have a U-shaped, rounded or any other suitable shape. -
Figs. 2 - 6 shows a portion of the firstside member pair 20 inFig. 1 from different directions and with different parts removed from the other parts in order to see how the ladder is designed and assembled, henceFigs. 1-6 will be described together. Eachstep 3 comprises a steppingportion 5, aleg supporting portion 6 and arear portion 14. Thesteps 3 may be made by a metal plate bent and cut out to the desired shape, or several pieces connected together or it may be extruded. The steppingportion 5 is the part of the step which the user will place his foot on when climbing the ladder. The steppingportion 5 is exemplified as being a flat surface, may however have a curved shape or any other suitable shape which accomplish a surface for the user to stand on. The steppingportion 5 extends between the twoside members 2 and it has a width, which is larger than the distance between thefront surface 4 and theback surface 15 of the side members, i.e. it extends beyond theside member 2, away from the user when climbing the ladder. This is in order to get a larger stepping surface for the user. The width of the stepping portion is not limited to be wider than theside member 2, it may be shorter or essentially the same. The steppingportion 5 is preferably arranged to theside members 2 such that it is essentially parallel with the surface theladder 1 is adapted to stand on during use, for example a floor. - The
leg supporting portion 6 extends along the steppingportion 5 and it comprises two side portions, i.e. two overlappingportions 7, on each side (seeFig. 2 , where theside step protections 10 and theside members 2 are removed from the step 3). The overlappingportions 7 overlap thefront surface 4 of theside members 2. The surface of theleg supporting portion 6, which is facing thefront surface 4 of theside members 2 are provided withprotrusions 8. The protrusions extend along the longitudinal direction of theleg supporting portion 6. Alternatively, the protrusions may only be in the area of the overlappingportion 7, which also is a connectingportion 7. Theprotrusions 8 arespacers 8, which create aspace 9 between thefront surface 4 and the overlapping portion 7 (seeFig. 5 ). Alternatively, a separate spacer or several separate spacers (not shown) may be arranged between thefront surface 4 and the overlappingportion 7. - The
leg supporting portion 6 is essentially flat and it extends from the steppingportion 5 at an angle, such that theleg supporting portion 6 extends parallel with thefront surface 4 of theside members 2. Theleg supporting portion 6 preferably has a width D3, which preferably is 10+/-2, more preferably 4+/-2cm. The larger the width of theleg supporting portion 6 is the more comfortable the leg supporting portion is for the user, since the user may support his leg on theleg supporting portion 6, when standing on a step arranged below. - The
rear portion 14 is facing away from the user when climbing the ladder. Therear portion 14 extends along the steppingportion 3 and it comprises two overlappingportion 16 on each side of the step (seeFig. 2 , where theside step protections 10 and theside members 2 are exploded from the step 3). The overlappingportion 16 of therear portion 14 overlaps therear surface 15 of theside members 2. - The surface of the
rear portion 14, which is facing therear surface 15 of theside members 2 are provided withprotrusions 26, which extends along the extension of therear portion 14. Alternatively, theprotrusions 26 may only be in the area of the overlappingportions 16 of therear portion 14. Theprotrusions 26 arespacers 26 which create aspace 17 between therear surface 15 and the overlappingportion 16 of the rear portion 14 (seeFig. 5 ). Alternatively, a separate spacer (not shown) may be arranged between therear surface 15 and the overlappingportion 16 of therear portion 14. Thestep 3 is secured to theside members 2 byfasteners fasteners screw side members 2 may comprise a threaded hole into which the screw can engage (not shown). Theleg supporting portion 6 comprises anopening 22 in each overlapping portion 7 (seeFig. 2 ), through which thescrew 27a is inserted before it threadedly engages with theside member 2. If a self-drilling screw or self-tapping screw is used, the screw can make the hole instead of having anopening 22 in the overlappingportion 7. Thescrew screw head 28a, 28b. Therear portion 14 is also connected to theside members 2 in the same way, however with twoscrews 27b. - The
side step protection 10 comprises a legsupport covering portion 11, astep covering portion 13 and arear covering portion 18. Theside step protection 10 is made of a plastic. Alternatively, it may be made of rubber. - The leg
support covering portion 11 comprises afront portion 30, which covers the area of the overlappingportion 7, which faces the user when climbing the ladder. Aside portion 31 is arranged to thefront portion 30 and from theside portion 31 two holdingportions 12 protrudes. The holdingportions 12 are tongues. The holdingportions 12 overlap thefront portion 30 at a distance, which allows theleg supporting portion 6 to be arranged between thefront portion 30 and the holdingportions 12. The distance may be such that the overlappingportion 7 of theleg supporting portion 6 is pressed between thefront portion 30 and the holdingportions 12. The thickness D2 (seeFig. 6 ) of the holdingportions 12, i.e. the tongues are thinner than the distance D1 (seeFig. 5 ) between the overlappingportion 7 and thefront surface 4 of theside member 2. When the step and theside step protection 10 are arranged on theside member 2 the holdingportions 12 are arranged in the area where no protrusions, i.e. spacers are arranged. The holdingportions 12 are also so arranged that they are out of contact with thefastener 27a. Thefront portion 30 of the legsupport covering portion 11 further comprises anopening 32. Thescrew head 28a is placed within theopening 32, so that thescrew head 28a abuts theleg supporting portion 6 and presses theprotrusions 8 against thefront portion 4 of theside member 2, without being in contact with theside step protection 10. Hence, the legsupport covering portion 11 is arranged on theleg supporting portion 6, without being pressed between the screw head and theside member 2. - The
step covering portion 13 is connected to the legsupport covering portion 11 and follows the outer contour of the end of the steppingportion 5. That is, it covers the outer edge of the end of the steppingportion 5. Thestep covering portion 13 also comprises tongues 38 (seeFig. 6 ), which overlaps thestep covering portion 13. The steppingportion 5 is arranged between thestep covering portion 13 and thetongues 38. Opposite arranged to the legsupport covering portion 11 and connected to thestep covering portion 13 is therear covering portion 18. The legsupport covering portion 11, thestep covering portion 13 and therear covering portion 18 are further connected to each other by awall 29. Thewall 29 protrudes from thestep covering portion 13, which connects the legsupport covering portion 11 and therear covering portion 18. Therear covering portion 18, comprises aback portion 33, which covers the area of the overlappingportion 16 which faces away from the user when climbing the ladder. Thewall 29 further connects the legsupport covering portion 11 and therear covering portion 18 underneath thestep 3. Thewall 29 comprises anopening 39 in order to reduce the material, however theopening 39 is not necessary for the function. Aside portion 34 is arranged to theback portion 33 of therear covering portion 18. From theside portion 34 two holdingportions 19 protrudes. The holdingportions 19 are tongues. The holdingportions 19 overlap theback portion 33 of therear covering portion 18 at a distance, which allows therear portion 14 of thestep 3 to be arranged between theback portion 33 and the holdingportions 19. The distance may be such that the overlappingportion 16 of therear portion 14 is pressed between theback portion 33 and the holdingportions 19 of the rear covering portion. The thickness of the holding portions D2' (seeFig. 6 ), i.e. the tongues, are thinner than the distance D1' (seeFig. 5 ) between the overlappingportion 16 and therear surface 15 of theside member 2. When thestep 3 and theside step protection 10 are arranged on theside member 2 the holdingportions 19 are arranged in the area where no protrusions are arranged, i.e. where no spacers are arranged. - The holding
portions 19 of therear covering portion 18 are also so arranged that they are out of contact with thefasteners 27b which protrudes throughopenings 22 in the overlappingportion 16 of therear portion 14. Theback portion 33 of therear covering portion 18 further comprises twoopenings 35. The screw heads 28b are placed within eachopening 35, so that the screw heads 28b abuts therear portion 14 and presses theprotrusions 26 against theside members 2, without being in contact with theside step protection 10. - The ladder described above is a folding ladder. However, the invention is not limited to a folding ladder. Any other stepladder, stand-alone ladder or leaning ladder may have same design as the first
side member pair 20, i.e. twoside members 2 and twosteps 3 arranged between said twoside members 2 and side step protections as described in connection with theFigs. 1-6 . - The invention has mainly been described above with reference to a few embodiments. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the invention, as defined by the appended claims.
Claims (15)
- A ladder (1) comprising two side members (2) and steps (3) arranged between said two side members (2),
said two side members (2) each comprises a front surface (4), which faces a user when climbing the ladder, and
at least one of said steps (3) comprises a stepping portion (5) and a leg supporting portion (6), wherein said leg supporting portion (6) is at least partly overlapping one of said front surfaces (4) of at least one of said side members (2) with an overlapping portion (7),
said ladder (1) further comprises- at least one spacer (8) arranged between said overlapping portion (7) of said leg supporting portion (6) and said front surface (4) in order to create a space (9) between said front surface (4) and said overlapping portion (7), and- a side step protection (10) comprising a leg support covering portion (11) and at least one holding portion (12), wherein said leg support covering portion (11) being at least partly arranged around said overlapping portion (7) of said leg supporting portion (6) and said at least one holding portion (12) being arranged in said space (9). - A ladder (1) according to claim 1, wherein said leg supporting portion (6) comprises an essentially flat outer surface, which faces the user when climbing the ladder, said flat outer surface extends partially along said side members (2).
- A ladder (1) according to claim 1 or claim 2, wherein said spacer (8) is a protrusion (8) protruding from said overlapping portion (7) of said leg supporting portion (6).
- A ladder (1) according to any one of the preceding claims, wherein the distance (D1) of said space (9) between said front surface (4) and said overlapping portion (7) is larger than the thickness (D2) of said holding portion (12), which is being arranged in said space (9).
- A ladder (1) according to any one of the preceding claims, wherein said at least one holding portion (12) is a tongue protruding from said leg support covering portion (11).
- A ladder (1) according to any one of the preceding claims, wherein said side step protection (10) is made of plastic.
- A ladder (1) according to any one of the preceding claims, wherein said side step protection (10) further comprises a step covering portion (13), which surrounds at least a part of said stepping portion (5).
- A ladder (1) according to any one of the preceding claims, wherein said at least one step (3) which comprises a stepping portion (5) and a leg supporting portion (6), further comprises a rear portion (14) with at least one overlapping portion (16) which at least partly overlaps an rear surface (15) of said side member (2), said rear surface (15) being essentially opposite arranged to said front surface (4).
- A ladder (1) according to claim 8, wherein said ladder (1) further comprises- at least a second spacer (26) arranged between said overlapping portion (16) of said rear portion (14) and said rear surface (15) in order to create a space (17) between said rear surface (15) and said overlapping portion (16), and- said side step protection (10) further comprises a rear covering portion (18) and at least one second holding portion (19), wherein said rear covering portion (18) being at least partly arranged around said overlapping portion (16) of said rear portion (14) and said at least one second holding portion (19) being arranged in said space (17) between said rear surface (15) and said overlapping portion (16).
- A ladder (1) according to any one of the preceding claims, wherein said ladder (1) further comprises at least one fastening element (27a), which connects said overlapping portion (7) of said leg supporting portion (6) with said side member (2)
- A ladder (1) according to any one of the preceding claims in combination with claim 8, said ladder (1) comprises at least one fastening element (27b), which connects said overlapping portion (16) of said rear portion (14) with said side member (2).
- A ladder (1) according to claim 11 and/or claim 10, wherein said fastening element (27a, 27b) is a screw which is screwed into said side member (2).
- A ladder (1) according to any one of the claims 10-12, wherein said side step protection (10) comprises at least one opening (32), which at least partly surrounds said at least one fastening elements (27a, 27b), such that said side step protection (10) is out of contact with said fastening element (27a).
- A ladder (1) according to any one of the preceding claims, wherein said two side members (2) are a side member pair (20) and said ladder further comprises a second side member pair (21), said first and second side member pairs (20, 21) are articulated arranged to each other.
- A ladder (1) according to any one of the preceding claims, wherein said ladder is in particular a folding ladder, a stepladder or a leaning ladder.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15174463.8A EP3112579B1 (en) | 2015-06-30 | 2015-06-30 | A ladder |
DK15174463.8T DK3112579T3 (en) | 2015-06-30 | 2015-06-30 | A LADDER |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15174463.8A EP3112579B1 (en) | 2015-06-30 | 2015-06-30 | A ladder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3112579A1 true EP3112579A1 (en) | 2017-01-04 |
EP3112579B1 EP3112579B1 (en) | 2020-04-29 |
Family
ID=53491403
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15174463.8A Active EP3112579B1 (en) | 2015-06-30 | 2015-06-30 | A ladder |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3112579B1 (en) |
DK (1) | DK3112579T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210115732A1 (en) * | 2016-12-14 | 2021-04-22 | Werner Co. | Ladder, Wide Rung and Method |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3077241A (en) * | 1960-09-15 | 1963-02-12 | Columbus Auto Parts | Rope ladder |
US4193477A (en) * | 1978-09-25 | 1980-03-18 | Ronald A. Minichillo | Ladder structure |
DE9403820U1 (en) * | 1994-03-08 | 1994-05-05 | MĂĽller, Hans, 35080 Bad Endbach | Roof-mounted ladder |
DE29809972U1 (en) * | 1998-06-04 | 1998-10-01 | Abart-Nikolaus, Anja, Mals | Ladder rung fitting |
EP1052366A1 (en) | 1999-05-12 | 2000-11-15 | Société Anonyme dite Tubesca | End cap for fixing a step of a stepstool or ladder and stepstool or ladder obtained therewith |
-
2015
- 2015-06-30 EP EP15174463.8A patent/EP3112579B1/en active Active
- 2015-06-30 DK DK15174463.8T patent/DK3112579T3/en active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3077241A (en) * | 1960-09-15 | 1963-02-12 | Columbus Auto Parts | Rope ladder |
US4193477A (en) * | 1978-09-25 | 1980-03-18 | Ronald A. Minichillo | Ladder structure |
DE9403820U1 (en) * | 1994-03-08 | 1994-05-05 | MĂĽller, Hans, 35080 Bad Endbach | Roof-mounted ladder |
DE29809972U1 (en) * | 1998-06-04 | 1998-10-01 | Abart-Nikolaus, Anja, Mals | Ladder rung fitting |
EP1052366A1 (en) | 1999-05-12 | 2000-11-15 | Société Anonyme dite Tubesca | End cap for fixing a step of a stepstool or ladder and stepstool or ladder obtained therewith |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210115732A1 (en) * | 2016-12-14 | 2021-04-22 | Werner Co. | Ladder, Wide Rung and Method |
US12110742B2 (en) * | 2016-12-14 | 2024-10-08 | Werner Co. | Ladder with wide rung |
Also Published As
Publication number | Publication date |
---|---|
DK3112579T3 (en) | 2020-07-06 |
EP3112579B1 (en) | 2020-04-29 |
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