JP3175235U - Scaffolding - Google Patents

Abstract

[Problem] To provide a scaffolding tool capable of suppressing fatigue of a ladder user's foot and detachable from the ladder.
A scaffolding tool 20 is detachably attached to a main stepping bar 13 or an auxiliary stepping bar 16 that can serve as a ladder scaffolding. The scaffold 20 includes a step plate 21, a main step bar engaging mechanism provided on the step plate 21 and engageable with the main step bar 13, and an auxiliary step provided on the step plate 21 and engageable with the auxiliary step bar 16. A crosspiece engaging mechanism. The step plate 21 has a step surface 21A serving as a scaffold and a support surface 21B opposite to the step surface 21A. The step plate 21 is bridged from the main step bar 13 to the auxiliary step bar 16 with the support surface 21B facing upward.
[Selection] Figure 4

Description

  The present invention relates to a scaffolding tool, and more particularly to a scaffolding tool that can be attached to and detached from a ladder.

  The ladder is used for ascending to a high place, and has a pair of legs and a step bar provided between the legs. The number of ladder legs is not limited to two, and there are three and four. For example, Patent Documents 1 and 2 describe a ladder having a pair of legs and a reinforcing leg in addition to two legs. The ladders of Patent Documents 1 and 2 are known as tripod ladders, tripod stepladders, or simply tripods.

  Further, the number of step bars constituting one stage is not limited to one, and there are a plurality of steps such as those described in Patent Documents 1 and 2. When there are a plurality of step bars constituting one stage, there is an advantage that the posture of the user is stabilized as a result of an increase in the portion supported by the user's foot as compared to a single step.

JP-A-9-112165 JP 2008-267048 A

  However, as in Patent Documents 1 and 2, in many ladders having a plurality of step bars constituting one step, the step members constituting one step are often separated from each other. When such a ladder is used, the force tends to concentrate on the portion of the user's foot that directly hits the stepping bar, so that the user tends to feel fatigue on the foot.

  The present invention has been made in view of the above problems, and an object thereof is to provide a scaffolding tool that can be attached to and detached from a ladder, particularly a scaffolding tool that can be attached to and detached from a ladder.

  Means for achieving the above object is a scaffolding tool that is detachably installed on a ladder trawl, and the trawl is spaced from the main traverse at the same height position with respect to the main traverse. An auxiliary stepped bar arranged at a distance, and the scaffolding tool is spanned from the main stepping bar to the auxiliary stepping bar, and constitutes a step surface serving as a scaffold, and is provided on the step plate. And an engagement mechanism that engages with the ladder.

  The step plate preferably has a protrusion protruding from the step surface. Moreover, it is preferable that the protrusion is formed by burring.

  It is preferable that the engaging mechanism has a side surface engaging portion that protrudes downward from the vicinity of the edge of the step plate and engages with a side surface of the main step bar or the auxiliary step bar. Moreover, it is preferable that an interference avoidance space is formed in the middle portion of the side surface engaging portion in the longitudinal direction of the main step rail or the auxiliary step bar.

  It is preferable that the side engaging portion is provided on both outer sides of the step plate in the longitudinal direction. Moreover, it is preferable that the said side surface engaging part has a main tread bar side surface engaging part engaged with the side surface of the said main tread bar, or an auxiliary tread bar side surface engaging part engaged with the side surface of the said auxiliary tread bar. .

  The engagement mechanism has a bottom surface engaging portion that protrudes in a direction from the lower end side of the side surface engaging portion toward the center portion of the step plate and engages with a bottom surface of the main step rail or the auxiliary step rail. preferable. In addition, it is preferable that the bottom surface engaging portion is formed only in one of the main stepping bar side surface engaging portion and the auxiliary stepping bar side surface engaging portion.

  The angle formed by the side surface engaging portion and the step plate is preferably an obtuse angle. The engagement mechanism preferably includes a through hole formed in the step plate, and a fastening band that is inserted into the through hole and fastens the ladder and the step plate.

  According to the scaffolding device of the present invention, the fatigue of the user of the ladder wearing the scaffolding device of the present invention is suppressed.

It is a front view of the ladder with which the scaffolding tool was mounted | worn. It is a side view of a ladder. It is a perspective view which shows the outline | summary of the scaffolding with which the ladder was mounted | worn. It is a perspective view which shows the outline | summary of the scaffolding tool removed from the ladder. It is a perspective view which shows the outline | summary of a scaffold. It is a perspective view which shows the outline | summary of a scaffold.

  As shown in FIGS. 1 and 2, the ladder 10 is passed between the pair of legs 11, the top plate 12 provided at one end of the pair of legs 11, and the pair of legs 11 in a horizontal direction. Step rails 13 arranged separately from the other end side toward the top plate 12, a support leg 14 having one end connected to the top plate 12 by a rotation mechanism (not shown), and one end connected to the top plate 12 A reinforcing leg 15 whose end is connected to the other end of the leg 11 and a reinforcing frame 16 that is arranged apart from the other end side toward the top plate 12 and connects the leg 11 and the reinforcing leg 15 are provided.

  In the ladder 10, the legs 11 and the support legs 14 can be freely opened and closed. Then, when the ladder 10 is stood up with the legs 11 and the support legs 14 opened so that the other ends of the legs 11 and the support legs 14 face downward, the user can use the stepping rail 13 that is almost horizontal as a scaffold. , Elevating operation can be performed. Further, since the top plate 12 is provided on the ladder 10, the user can place a luggage or the like on the top plate 12.

  As shown in FIGS. 3 to 4, the reinforcing frame 16 substantially parallel to the step bar 13 extends from one leg 11 to the other leg 11 via the one reinforcing leg 15 and the other reinforcing leg 15. . When the reinforcing frame 16 is provided at substantially the same height as the step bar 13, that is, when the formation position of the reinforcement frame 16 corresponds to the formation position of the step frame 13, the reinforcing frame 16 is also used together with the step frame 13. , Function as a scaffold. In this case, the step bar 13 functions as a main step bar, and the reinforcing frame 16 functions as an auxiliary step bar. Hereinafter, the step rail 13 is referred to as a main step bar 13 and the reinforcing frame 16 is referred to as an auxiliary step bar 16.

  The material of the ladder 10 includes, for example, a metal, and among them, a lightweight metal such as aluminum is preferable.

  The scaffolding tool 20 is detachably attached to the ladder 10, and is attached to the main stepping bar 13 and the auxiliary stepping bar 16 that serve as a scaffolding for the ladder 10. The portion to which the scaffolding tool 20 is attached may be any of the plurality of main stepping bars 13 and auxiliary stepping bars 16 provided.

  The scaffold 20 includes a step plate 21 having an upper surface (hereinafter referred to as a step surface) 21A and a lower surface (hereinafter referred to as a support surface) 21B, and a main stepping foot provided on the step plate 21 and engageable with the main step bar 13. A crosspiece engaging mechanism, and an auxiliary stepped crosspiece engaging mechanism that is provided on the step plate 21 and can be engaged with the auxiliary stepped crosspiece 16.

  The step plate 21 is bridged from the main step bar 13 to the auxiliary step bar 16 with the support surface 21B facing upward.

  The main tread bar engagement mechanism has a main tread bar side surface engagement plate 22 that engages with the front side surface of the main tread bar 13. The main tread bar side surface engaging plate 22 is provided at the front end of the step plate 21 so as to protrude downward from the support surface 21B. The main treadle side surface engaging plate 22 extends obliquely with respect to the support surface 21B so that the tip is in front of the base end. For this reason, the angle L of the angle formed by the main treadle side surface engaging plate 22 and the step plate 21 is an obtuse angle. Thereby, mounting | wearing to the ladder 10 of the scaffolding tool 20 becomes easy. The main treadle side surface engaging plate 22 may extend perpendicular to the support surface 21B.

  The auxiliary tread bar engaging mechanism includes an auxiliary tread bar side surface engaging plate 23 that engages with the rear side surface of the auxiliary tread bar 16, and an auxiliary tread bar bottom surface engaging plate 24 that engages with the bottom surface of the auxiliary tread bar 16. The auxiliary tread bar side surface engaging plate 23 is provided at the rear end portion of the step plate 21 so as to protrude downward from the support surface 21B. The auxiliary tread bar bottom surface engaging plate 24 is provided so as to extend from the lower end of the auxiliary tread bar side surface engaging plate 23 toward the center of the step plate 21, that is, forward.

  The step plate 21, the auxiliary stepping bar side surface engaging plate 23, and the auxiliary stepping bar bottom surface engaging plate 24 form a J-shaped structure to which the auxiliary stepping bar 16 can be inserted. When the scaffolding tool 20 is attached to the auxiliary foot 16 so that the auxiliary foot 16 is inserted into the space 30 having the J-shaped structure, the step plate 21, the auxiliary foot side surface engaging plate 23, and the auxiliary foot surface are engaged. As a result of the plywood 24 engaging with the auxiliary tread bar 16 and the main tread bar side surface engaging plate 22 engaging with the main tread bar 13, the scaffolding tool 20 is locked to the ladder 10 in the front-rear direction.

  Further, the step plate 21 has a protrusion 21T protruding from the step surface 21A. The protrusion 21T is formed by burring. The step plate 21 has a through hole 21X extending from the step surface 21A to the support surface 21B. Here, the shape of the protrusion 21T may be a circle, or may be an ellipse, a polygon, a straight line, a curve, or the like. In addition, the number of the protrusions 21T on the step surface 21A may be one or more, but a plurality is more preferable. The arrangement pattern of the protrusions 21T on the step surface 21A may be any. Moreover, you may provide a through-hole in the main treadle side surface engaging plate 22 or the auxiliary treadle side surface engaging plate 23. FIG.

  Each material of the step plate 21, the main stepping bar side surface engaging plate 22, the auxiliary stepping bar side surface engaging plate 23, and the auxiliary stepping bar side surface engaging plate 24 is, for example, a metal, and in particular, a light metal such as aluminum. Is preferred. In addition, the plate thickness of each of the step plate 21, the main stepping bar side surface engaging plate 22, the auxiliary stepping bar side surface engaging plate 23, and the auxiliary stepping bar side surface engaging plate 24 is, for example, 1.5 mm or more and 3 mm or less.

  Since the scaffolding tool 20 has a sufficiently large step surface 21A compared to the areas of the main stepping bar 13 and the auxiliary stepping bar 16 constituting the first stage, the force applied to the user's foot is dispersed. As a result, it becomes possible to relieve the user's feeling of fatigue.

  Further, since the step plate 21 has the protrusion 21T, the grip force of the shoe is not easily lost. For example, even when the user steps on the step surface 21A with mud or snow on the back of the shoe, the grip strength of the shoe is not easily lost due to the presence of the protrusion 21T. As a result, the user can stably move up and down.

  Furthermore, even if the scaffolding tool 20 is soiled by mud, snow, or the like adhering to the back of the user's shoes, the scaffolding tool 20 can be easily detached from the ladder 10, so that the scaffolding tool 20 is washed. Is easy. As a result, by using the scaffolding tool 20, it becomes easy to provide a user with a ladder in a good state of scaffolding.

  A slip prevention member made of a material having a friction coefficient larger than that of the step plate 21, the auxiliary stepping bar side surface engaging plate 23, and the auxiliary stepping bar bottom surface engaging plate 24 itself with respect to the main stepping bar 13 and the auxiliary stepping bar 16, You may provide in the upper surface of the support surface 21B of the step plate 21, the front surface of the auxiliary footpiece side surface engaging plate 23, and the auxiliary footstep bottom surface engaging plate 24. Although it does not specifically limit as a shape of a non-slip member, For example, there exists a sheet form. Further, the material of the anti-slip member is not particularly limited, and examples thereof include rubber.

  Depending on the shape of the auxiliary stepping bar 16, a part of the auxiliary stepping bar side surface engaging plate 23 and the auxiliary stepping bar bottom surface engaging plate 24 may interfere with other members. It is preferable that a clearance space for escaping interference with the other member is formed in the auxiliary stepping bar side surface engaging plate 23 and the auxiliary stepping bar bottom surface engaging plate 24. For example, when the other member is located in the lateral center portion of the rear end portion of the step plate 21, the auxiliary stepping rail side surface engaging plate 23 and the auxiliary stepping rail bottom surface engaging plate are disposed in the entire lateral direction of the rear end portion of the step plate 21. As shown in FIG. 5, an auxiliary tread bar side surface engaging plate 23 and an auxiliary tread bar side surface engaging plate 24 may be provided at both lateral ends of the rear end portion of the step plate 21, respectively. At this time, a clearance space 35 is formed between the auxiliary tread bar side surface engagement plates 23 provided at both lateral ends of the rear end portion of the step plate 21.

  In the above-described embodiment, the auxiliary stepping bar engaging mechanism has the auxiliary stepping bar side surface engaging plate 23 and the auxiliary stepping bar bottom surface engaging plate 24. However, the present invention is not limited to this, and the auxiliary stepping bar bottom surface engaging plate. 24 may be omitted. The main tread bar engagement mechanism may have a main tread bar bottom surface engaging plate that engages with the bottom surface of the main tread bar 13 together with the main tread bar side surface engaging plate 22. The main tread bar bottom surface engaging plate extends from the lower end of the main tread bar side surface engaging plate 22 to the center of the step plate 21, that is, to the rear. From the viewpoint of ease of mounting on the ladder 10, it is preferable that only one of the main tread bar bottom surface engaging plate and the auxiliary tread bar bottom surface engaging plate 24 is formed.

  In addition, you may abbreviate | omit the auxiliary tread bar engaging mechanism, ie, the auxiliary tread bar side surface engaging plate 23 and the auxiliary tread bar bottom surface engaging plate 24. In this case, the auxiliary tread bar 16 and the ladder 10 may be fastened using a fastening band 40 that can be inserted into the through hole 21X located on the rear side (see FIG. 6). In this case, the fastening band 40 and the through hole 21X function as an engagement mechanism. Of the through holes 21X formed in the step plate 21, the protrusions 21T may not be formed on the periphery of the through hole 21X into which the fastening band 40 is inserted. Further, the portion that is locked to the scaffolding tool 20 by the fastening band 40 may be the auxiliary foot 16 as illustrated, or may be any part of the ladder 10 such as the reinforcing leg 15.

  Similarly, the main tread bar engagement mechanism may be omitted. In this case, a fastening band that can be inserted into the through hole 21X located on the front side may be used. In this case, the fastening band and the through hole 21X function as an engagement mechanism. It should be noted that the main tread bar engagement mechanism and the auxiliary tread bar engagement mechanism are omitted, and a fastening band that can be inserted into the through hole 21X located on the front side and a fastening band 40 that can be inserted into the through hole 21X located on the rear side. And may be used in combination.

DESCRIPTION OF SYMBOLS 10 Ladder 11 Leg 12 Top plate 13 Crosspiece 14 Support leg 15 Reinforcement leg 16 Reinforcement frame 20 Scaffold 21 Step board 21A Step surface 21B Support surface 21T Protrusion 21X Through hole 22 Main stepping bar side surface engaging plate 23 Auxiliary stepping bar side surface engaging plate 24 Auxiliary tread bar bottom surface engagement plate 30 Space 40 Fastening band

Claims (11)

A scaffolding tool that is detachably installed on a ladder crosspiece,
The step pedestal includes a main step pedestal and an auxiliary step pedestal that is spaced from the main step pedestal at the same height.
The scaffold is
A step plate that spans from the main step bar to the auxiliary step bar and constitutes a step surface that serves as a scaffold,
An engagement mechanism provided on the step plate and engaged with the ladder;
Scaffolding device characterized by comprising.   The scaffold according to claim 1, wherein the step plate has a protrusion protruding from the step surface.   The scaffold according to claim 2, wherein the projection is formed by burring.   The said engaging mechanism has a side surface engaging part which protrudes below from the edge vicinity of the said step plate, and engages with the side surface of the said main stepping rail or the said auxiliary stepping rail. The scaffold according to any one of the above.   The scaffold according to claim 4, wherein an interference avoidance space is formed in a middle portion of the side surface engaging portion in the longitudinal direction of the main step bar or the auxiliary step bar.   The scaffold according to claim 4 or 5, wherein the side surface engaging portion is provided on both outer sides of the step plate in the longitudinal direction.   The side surface engaging portion includes a main stepping bar side surface engaging part that engages with a side surface of the main stepping bar, or an auxiliary stepping bar side surface engaging part that engages with a side surface of the auxiliary stepping bar. The scaffold according to claim 5.   The engaging mechanism has a bottom surface engaging portion that protrudes in a direction from the lower end side of the side surface engaging portion toward the center portion of the step plate and engages with a bottom surface of the main step rail or the auxiliary step rail. The scaffold according to any one of claims 1 to 7, wherein the scaffold is any one of the above.   The scaffold according to claim 8, wherein the bottom surface engaging portion is formed only in one of the main stepping bar side surface engaging portion and the auxiliary stepping bar side surface engaging portion. The scaffold according to any one of claims 1 to 9, wherein an angle formed by the side surface engaging portion and the step plate is an obtuse angle.   The said engagement mechanism has a through-hole formed in the said step plate, and a fastening band inserted in the said through-hole and fastening the said ladder and the said step plate. The scaffold according to any one of the above.

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