JP3128837U - Scaffolding device having ladder-like legs - Google Patents

Abstract

There is provided a scaffold device having a ladder-like leg that can reliably prevent shaking and falling even on a non-flat ground contact surface.
In a scaffold device (10) having ladder-like legs (14, 17) in which a plurality of step bars (13) are provided with a gap between a pair of support members (11, 12, 15, 16) provided on both sides. A projecting member 18 is provided at the lower end 21 of each column member 11, 12, 15, 16 so as to be pivotable about the lower end 21, and a screw mechanism 19 is provided at the tip of the projecting member 18. The height adjustment handle 47 is provided at the upper part, and the support member 20 having the grounding pad 48 is provided at the lower part. The overhang member 18 has the support members 11, 12, 15, 16 as the axis. The extension member 18 is provided with a locking means 38 that can be extended and contracted and that fixes the length of the extended extension member 18.
[Selection] Figure 1

Description

The present invention relates to a scaffold apparatus having a ladder-like leg used for high-place work in building work, interior / exterior such as a ceiling or wall surface of a building, and electrical wiring.

For example, a stepladder used for high-altitude work is provided such that an opposing ladder-like leg can be tilted to the lower side of the work table. For this reason, when using a stepladder with the ladder-shaped leg open, the distance between the lower ends of the strut members facing in the width direction of the ladder-shaped leg is between the lower ends of the strut members facing in the open leg direction. It is narrower than the distance. For this reason, when working on a tread board, there exists a problem that it is easy to shake to a width direction rather than the leg-opening direction of a ladder-like leg body, and also falls easily. In view of this, it has been proposed to attach a fall prevention tool to the lower end portion of the column member of each ladder-like leg (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-62449

However, in the stepladder described in Patent Document 1, since the fall prevention device is formed so as to extend in the opening leg direction of the ladder-like leg, it is possible to reliably prevent the ladder-like leg from shaking or falling in the width direction. I couldn't. In addition, when using a stepladder on an installation surface with unevenness such as unpaved or crushed stone only, a gap is created between the fall prevention device and the installation surface, and the stability of the stepladder becomes worse. The problem arises.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a scaffold device having a ladder-like leg that can reliably prevent shaking and falling even on a non-flat ground contact surface.

A scaffold device having a ladder-like leg according to the present invention that meets the above-mentioned object is a scaffold device having a ladder-like leg in which a plurality of step bars are provided with a gap between a pair of support members provided on both sides. In
An extension member provided at the lower end portion of each of the support members so as to be pivotable about the support member, and a tip of the extension member is provided so as to be adjustable up and down via a screw mechanism. The height adjustment handle has a support member with a grounding pad at the bottom,
The overhanging member has fixing means for stopping and holding the overhanging member swung around the support column member at a predetermined angle, and the overhanging member is adjustable and expandable / contracted. Locking means for fixing the length is provided.

In the scaffold device having a ladder-like leg according to the present invention, the portions where the swiveling portions of the overhanging member are respectively mounted at the lower end of the support member are parallel to each other, and the support member can swivel in a horizontal plane It is preferable that

In the scaffold device having a ladder-like leg according to the present invention, the overhanging member has a double pipe portion into which the inner pipe is fitted into the outer pipe, and either the outer pipe or the inner pipe is provided. Is provided with a longitudinal groove guide, and a pin fitted to the longitudinal groove guide is fixed to either the outer tube or the inner tube to stop the rotation of the inner tube with respect to the outer tube. It is preferable.

In the scaffold device having a ladder-like leg according to the present invention, the scaffold device can be a stepladder having the pair of ladder-like legs at the lower part of a work table. In addition, the scaffold device may be a ladder having the ladder-like leg that can be expanded and contracted.

In the scaffold device having the ladder-like legs according to claims 1 to 5, the overhanging member can be pivoted about the support member and stopped and held at a predetermined angular position, and the overhanging member can be adjusted to extend and contract. Since the length can be determined at an arbitrary position, the support member can be moved to an optimum place. Since the height of the support member can be adjusted, the ground pad can be reliably brought into contact with the ground plane even if the ground plane is not uniform. As a result, even if there are irregularities or obstacles on the ground surface, the ground pad can be moved to the optimal location for grounding, and the stability when the scaffold device is grounded can be improved. Can prevent shaking (especially rolling) and falling.

In particular, in the scaffold device having the ladder-like leg according to claim 2, since the support member is capable of turning in a horizontal plane, the scaffold device can be prevented from being tilted when the overhanging member is turned.

In the scaffold device having the ladder-like leg according to claim 3, when the extension member is expanded and contracted, the grounding pad can be prevented from rotating around the extension member, and the operation of the extension member can be prevented. In addition to being easy, the ground pad can be easily brought into contact with the ground plane simply by operating the height adjusting handle.

In the scaffold device having the ladder-like leg according to claim 4, since the scaffold device is a stepladder, the stepladder can be prevented from shaking and falling, and the work at a high place can be performed safely.

In the scaffold apparatus having the ladder-like leg according to claim 5, since the scaffold apparatus is a ladder, the ladder can be prevented from shaking and falling, and the ladder can be raised and lowered safely.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is an explanatory view of a stepladder as an example of a scaffold device having a ladder-like leg according to the first embodiment of the present invention, and FIG. 2 (A) is an overhang member used for the stepladder. FIG. 3B is a side view of the support member, FIG. 3B is a plan view of the extension member used for the stepladder and the support member, FIG. 3 is an explanatory view of the locking means provided on the extension member, and FIG. It is explanatory drawing of the ladder which is an example of the scaffold apparatus which has the ladder-shaped leg concerning this embodiment.

As shown in FIG. 1, a stepladder 10, which is an example of a scaffold device having a ladder-like leg according to the first embodiment of the present invention, includes a plurality of strut members 11, 12 provided on both sides. A plurality of step bars 13 are provided with gaps between a first ladder-like leg body 14 provided with gaps and a pair of support members 15 and 16 provided on both sides. Second ladder-like legs 17 are provided as a pair at the lower part of a work table (not shown). In addition, a protruding member 18 is provided at the lower end portion 21 of each of the supporting members 11, 12, 15, 16 so as to be pivotable about the supporting members 11, 12, 15, 16 as the axis. A support member 20 is provided at the tip portion via a screw mechanism 19 so as to be adjustable up and down. Details will be described below.

The first and second ladder-like legs 14 and 17 are tiltably provided at the lower part of the work table, and a pair of support members 11 and 12 and the second ladder-like legs constituting the first ladder-like leg 14. A pair of support | pillar members 15 and 16 which comprise the body 17 are arrange | positioned so that a space | interval may become narrow gradually as it goes to an upper end side from a lower end side, for example. Moreover, the lower end part 21 of the support | pillar members 11, 12, 15, and 16 is formed from a pipe | tube or a round bar, for example, and is arrange | positioned mutually parallel. Further, the lowermost steps 13 of the first and second ladder-like legs 14 and 17 are connected by a foldable connecting member 22 having a lock mechanism (not shown). As a result, the first and second ladder-like legs 14 and 17 are opened on both sides of the work table, and the locking mechanism is operated to make the connecting member 22 unbreakable. The second ladder-like legs 14 and 17 can be prevented from tilting.

As shown in FIGS. 2 (A) and 2 (B), the overhang member 18 is attached to the lower end portion 21 of the column members 11, 12, 15 and 16 which are parallel to each other, and the lower end portion 21 is the axis. It has a turning part 23 that turns, a fixing means 24 that stops and holds the turning part 23 at a predetermined angle, and a double pipe part 25 whose base side is fixed to the turning part 23. As a result, the support member 20 provided at the front portion of the overhang member 18 can be turned in a horizontal plane.
Here, the swivel unit 23 has a tubular member 26 through which the lower end 21 passes, a mounting plate member 27 fixed to a side portion of the tubular member 26, and flanges 28 provided at both ends of the tubular member 26. . Providing the flanges 28 at both ends of the tubular material 26 can reinforce both ends of the tubular material 26 and prevent deformation.

Further, the fixing means 24 is located on the side of the tubular member 26 in a circumferential position different from that of the mounting plate member 27 (in FIGS. 2A and 2B, a position moved by 90 ° in the circumferential direction with respect to the mounting plate member 27). A substrate material 29 fixed to the substrate material, a screw hole 30 provided through the surface from the front side of the substrate material 29 to the back surface side of the tubular material 26 and having an internal thread portion formed inside, and a screw hole 30 provided with a handle 31 on the base side. And has a male screw member 32 whose tip is in contact with the side of the lower end 21. As a result, by disengaging the distal end portion of the male screw material 32 from the side portion of the lower end portion 21, the turning portion 23 can be turned to a predetermined angular position with the lower end portion 21 as an axis, By contacting the side of the lower end 21, the turning part 23 that has turned to a predetermined angular position can be stopped and held with respect to the lower end 21.

As shown in FIGS. 2 (A), 2 (B), and 3, the double pipe portion 25 includes an inner tube 33 that is fixed to a mounting plate member 27 that is branched at the base side and fitted into a gap formed at the center, And an outer tube 34 into which the tube 33 is inserted. Further, the double pipe portion 25 is covered with a longitudinal groove guide 35 formed in the outer tube 34 and a part of the side surface of the outer tube 34 so as to cover a part of the longitudinal groove guide 35. The contact member 40 has a pin 37 that passes through the contact member 40 and is fitted into the longitudinal groove guide 35 and screwed into a screw hole 36 formed in the inner tube 33 on the tip side.
By adopting such a configuration, the inner tube 33 can be slid with respect to the outer tube 34 in a state where the pin 37 is fitted into the longitudinal groove guide 35 and fixed to the inner tube 33, and protrudes from the outer tube 34. The length of the overhanging member 18 can be adjusted by expanding and contracting the length of the inner tube 33 to be made. When the pin 37 moves in the longitudinal groove guide 35, the rotation of the inner tube 33 with respect to the outer tube 34 is stopped and the inner tube 33 is slid so as to protrude from the outer tube 34. It is possible to prevent 33 from being detached (pulled out) from the outer tube 34.

The overhang member 18 is provided with a lock means 38 for fixing the length of the extended overhang member 18. Here, the locking means 38 covers a part of the side surface of the outer tube 34 and is positioned at an angular position in the circumferential direction facing the arcuate covering member 39 and the longitudinal groove guide 35 on the side of the outer tube 34 when viewed from the front. A formed vertical groove 41 for movement, and a plurality of fixing screw holes 42 formed at regular intervals along the vertical direction at angular positions in the circumferential direction facing the screw holes 36 on the side of the inner tube 33; The cover member 39 has a lock pin 44 that penetrates the through hole 45 formed in the cover member 39 and the moving vertical groove 41 and is screwed into the fixing screw hole 42 at the front side, and has a handle 43 at the base.

By adopting such a configuration, the inner tube 33 is slid in the outer tube 34 so that the center position of the fixing screw hole 42 formed in the inner tube 33 and the center position of the through hole 45 are matched. The tip side of the lock pin 44 fitted in the through hole 45 can be passed through the moving vertical groove 41 and screwed into the fixing screw hole 42. As a result, the inner tube 33 slid in the outer tube 34 can be fixed to the outer tube 34, and the length of the overhanging member 18 can be fixed.

As shown in FIGS. 2A and 2B, the support member 20 is fixed to the distal end portion of the outer tube 34, and a holding portion 46 provided with a screw hole constituting a part of the screw mechanism 19 at the center portion. And a bolt member 49 which is engaged with the screw hole, has a height adjustment handle 47 at the upper portion, and has a grounding pad 48 at the lower portion and constitutes the remaining portion of the screw mechanism 19. With such a configuration, by operating the height adjustment handle 47, the bolt member 49 meshed with the holding portion 46 can be raised and lowered with respect to the holding portion 46, and the ground pad 48 can be securely connected. Can be grounded.

Next, a method of using the stepladder 10 according to the first embodiment of the present invention will be described.
The first and second ladder-like legs 14 and 17 of the stepladder 10 transported to the grounding place are opened, and the locking mechanism is operated to make the connecting member 22 unbreakable.
Next, the inner tube 33 is slid in the outer tube 34 while the swivel unit 23 is swung around the lower end 21 of the support members 11, 12, 15, 16, and the ground pad 48 of each support member 20 is moved. Move to the optimal location. When the positioning of each grounding pad 48 is completed, the handle 31 of the fixing means 24 is operated to stop and hold the overhanging member 18 at a predetermined angle with the column members 11, 12, 15 and 16 as the axis, and the lock The handle 43 of the means 38 is operated to fix the length of the overhang member 18. Subsequently, the height adjustment handle 47 of the support member 20 is operated to ground the ground pads 48, and the height position of each ground pad 48 is raised and lowered. Thereby, the upper surface of the work table in which the first and second ladder-like legs 14 and 17 are provided below can be held horizontally, and the grounding of the stepladder 10 is completed.

As shown in FIG. 4, a ladder 50, which is an example of a scaffold device having a ladder-like leg according to the second embodiment of the present invention, has a ladder-like leg 51 that can be expanded and contracted. Here, the ladder-like leg 51 is provided with a pair of strut members 52 and 53 that are provided on both sides and extendable, and a plurality of step bars 54 that are provided with a gap between the strut members 52 and 53, and extend and contract. Fixing means (not shown) for fixing the lengths of the post members 52 and 53 are provided. Furthermore, the ladder 50 includes an overhang member 56 that is turnable about the lower end portion 55 of the support members 52 and 53, and a support member 57 that is provided at the tip of the overhang member 56. ing.
Here, the overhang member 56 and the support member 57 can be configured substantially the same as the overhang member 18 and the support member 20 of the stepladder 10 according to the first embodiment of the present invention. The same reference numerals are given to the constituent members and detailed description thereof is omitted.

Next, a method for using the ladder 50 according to the second embodiment of the present invention will be described.
The column members 52 and 53 of the ladder-like leg 51 provided on the ladder 50 conveyed to the grounding place are extended and the fixing means is operated to fix the length. Next, the inner pipe 33 is slid in the outer pipe 34 while turning the turning section 23 with the lower end portion 55 of the support members 52 and 53 as an axis, and the grounding pad 48 of each support member 57 is brought to the optimum place. Move. When the positioning of each grounding pad 48 is completed, the handle 31 of the fixing means 24 is operated to stop and hold the protruding member 56 at a predetermined angle with the lower end portion 55 as an axis, and the handle 43 of the locking means 38 is held. The length of the overhang member 56 is fixed by operating. Subsequently, the height adjusting handle 47 of the support member 57 is operated to ground the ground pads 48, and further, the height positions of the ground pads 48 are moved up and down. Thereby, the crosspiece 54 of the ladder-like leg 51 can be held horizontally, and the grounding of the ladder 50 is completed.

As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, The change in the range which does not change the summary of invention is possible, Each above-mentioned implementation is possible. The case where the scaffold device having the ladder-like leg of the present invention is configured by combining a part or all of the forms and modifications is also included in the scope of the right of the present invention.
For example, the swivel portion is fixed to the inner tube of the double tube portion and the support member is fixed to the outer tube, but the swivel portion is fixed to the outer tube of the double tube portion and the support member is fixed to the inner tube. Good. In the above embodiment, the longitudinal groove guide is provided on the outer tube, and the pin fitted into the longitudinal groove guide is fixed to the inner tube. However, the longitudinal groove guide is provided on the inner tube, and the pin is fixed to the outer tube. Good.
In the above-described embodiment, the case where only the support members 20 and 57 are grounded has been described. However, the present invention can be applied to the case where the lower end portion of the support member is also grounded.

It is explanatory drawing of the stepladder which is an example of the scaffold apparatus which has the ladder-shaped leg concerning the 1st Embodiment of this invention. (A) is a side view of an overhang member and a support member used for the stepladder, and (B) is a plan view of the overhang member and the support member used for the stepladder. It is explanatory drawing of the locking means provided in the overhang | projection member. It is explanatory drawing of the ladder which is an example of the scaffold apparatus which has the ladder-shaped leg concerning the 2nd Embodiment of this invention.

Explanation of symbols

10: stepladder, 11, 12: strut member, 13: pedestrian crossing, 14: first ladder leg, 15, 16: strut member, 17: second ladder leg, 18: overhang member, 19 : Screw mechanism, 20: support member, 21: lower end part, 22: connecting material, 23: turning part, 24: fixing means, 25: double pipe part, 26: tubular material, 27: mounting plate material, 28: flange, 29: substrate material, 30: screw hole, 31: handle, 32: male screw material, 33: inner tube, 34: outer tube, 35: longitudinal groove guide, 36: screw hole, 37: pin, 38: locking means, 39 : Cover member, 40: contact member, 41: longitudinal groove for movement, 42: screw hole for fixing, 43: handle, 44: lock pin, 45: through hole, 46: holding portion, 47: handle for height adjustment 48: Ground pad, 49: Bolt member, 50: Ladder, 51: Ladder leg, 52, 53: Post part , 54: 踏桟, 55: lower end, 56: protruding member, 57: support member

Claims (5)

In the scaffold device having a ladder-like leg provided with a plurality of step bars between a pair of support members provided on both sides, with a gap,
An extension member provided at the lower end portion of each of the support members so as to be pivotable about the support member, and a tip of the extension member is provided so as to be adjustable up and down via a screw mechanism. The height adjustment handle has a support member with a grounding pad at the bottom,
The overhanging member has fixing means for stopping and holding the overhanging member swung around the support column member at a predetermined angle, and the overhanging member is adjustable and expandable / contracted. A scaffolding device having a ladder-like leg, wherein locking means for fixing the length of the ladder is provided. 2. The scaffold device having a ladder-like leg according to claim 1, wherein portions where the swiveling portions of the projecting members are respectively mounted are parallel to each other at a lower end portion of the support member, and the support member swivels in a horizontal plane. A scaffold device having a ladder-like leg, characterized in that it is possible. The scaffold apparatus having a ladder-like leg according to any one of claims 1 and 2, wherein the projecting member has a double pipe portion into which the inner pipe is fitted into the outer pipe, and the outer pipe A longitudinal groove guide is provided on one of the inner tube and a pin fitted into the longitudinal groove guide is fixed to the other of the outer tube and the inner tube. A scaffolding device having a ladder-like leg, wherein rotation of the inner tube is stopped. The scaffold apparatus having a ladder-like leg according to any one of claims 1 to 3, wherein the scaffold apparatus is a stepladder having the pair of ladder-like legs at a lower part of a work table. Scaffolding device having a ladder-like leg. The scaffold apparatus having a ladder-like leg according to any one of claims 1 to 3, wherein the scaffold apparatus is a ladder having the extendable ladder-like leg. Scaffolding device having.

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