JP2003286794A - Working platform device for ladder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working platform device for a ladder which can be produced at a low cost and used easily and safely by anyone thereby enhancing the working efficiency. <P>SOLUTION: The working platform device for ladder comprises left and right attaching brackets 11 and 11 and a working platform 17 hooked between left and right base attaching members 12 and 12. The brackets 11 and 11 comprise the attaching members 12 and 12 horizontally installed by inserting insertion bars 12c and 12c in upper holes 4 and 4 provided in the right and left supports 2 and 2 of the ladder 1 and the right and left brackets 11 and 11 connected to swingably support the attaching members 12 and 12 from the lower side and installed by inserting rods 13c and 13c in lower holes 4 and 4 of the ladder 1. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder workbench device which can be safely used by attaching a workbench to a ladder.

[0002]

2. Description of the Related Art For work at a high place such as a construction site of a house or a remodeling work site, a method of forming a scaffold for work or placing a scaffold board on two high step ladders is usually adopted. ing. In addition, a simple work at a high place may be performed by hanging a ladder.

[0003]

However, when a scaffolding for work is assembled, it is large-scaled and costly, and the method of hanging the scaffolding board on the stepladder has a height limitation.
In addition, when a ladder is hung, the work range is narrow because the legs are hung on the thin cross rail of the ladder, which is not suitable for long-term work, and there is a risk of safety problems.

The present invention has been made in view of the above circumstances.
It is an object of the present invention to provide a ladder workbench device that can be easily and safely used by anyone, can improve work efficiency, and can be manufactured at low cost.

[0005]

In order to achieve the above object, according to the invention described in claim 1, the insertion rod is inserted horizontally into the upper holes provided on the left and right supporting columns of the ladder so as to be horizontal. Left and right mounting having a table mounting member to be mounted and a supporting member which is rotatably connected to support the table mounting member from the lower side and which is mounted by inserting an insertion rod into the lower hole of the ladder. Brackets and a work platform for scaffolding that is hooked between the upper portions of the left and right platform attachment members. By hanging the workbench on the left and right mounting brackets mounted on the ladder, anyone can easily and safely use the workbench and can improve the work efficiency, and the manufacturing cost can be reduced.

According to a second aspect of the present invention, a holding member provided along the column of the ladder, a base mounting member horizontally projecting on the front side of the upper end of the holding member, and the holding member are provided. A support member fixed between the front side on the lower end side and the lower end side of the base mounting member, and an upper side insert mounted so as to project toward the upper support side of the holding member and inserted into the upper hole. Left and right mounting brackets having a rod and a lower insertion rod that is attached so as to project toward the lower support column side of the holding member and is inserted into the lower hole, and the upper portions of the left and right table mounting members. It is characterized in that it is provided with a work platform for a scaffold which is hung in between. By hanging the workbench on the left and right mounting brackets mounted on the ladder, anyone can easily and safely use the workbench and can improve the work efficiency, and the manufacturing cost can be reduced.

According to a third aspect of the present invention, the upper and lower shafts are inserted into the upper and lower holes of the ladder with both ends thereof protruding, and one end of the upper shaft ends. The base mounting member is provided with a clamp portion to be clamped to the end portion and is horizontally projected.The clamp portion to be clamped to the end portion of the lower shaft is attached to one end side and the other end side is rotated to the lower end portion of the base attachment member. It is characterized in that it is provided with left and right mounting brackets having movably connected support members and a work platform for a scaffold which is hooked between the upper parts of the left and right platform mounting members. By hanging the workbench on the left and right mounting brackets mounted on the ladder, anyone can easily and safely use the workbench and can improve the work efficiency, and the manufacturing cost can be reduced.

According to a fourth aspect of the present invention, a fall prevention device is provided on the upper side of the ladder, which is rotatably provided with an abutting member that abuts under the eaves of the building. It is characterized by. By installing the fall prevention device on the upper side of the ladder, work can be performed safely.

According to a fifth aspect of the present invention, the upper side of the ladder has an upper side hook for hanging on the upper part of the roof handrail of the building and a lower side hook for hanging on the uppermost step of the ladder. A fall prevention device including a mounting member is attached. By installing the fall prevention device on the upper side of the ladder, work can be performed safely.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below with reference to an embodiment shown in the drawings. 1 to 4 are views for explaining a ladder workbench apparatus according to the first embodiment of the present invention, FIG. 1 is a perspective view of the ladder workbench apparatus, and FIG. 2 is an exploded perspective view of the ladder workbench apparatus. FIG. 3 is an exploded perspective view of the left mounting bracket, and FIG. 4 is an enlarged cross-sectional view of a portion of the mounting bracket that is inserted into the ladder.

In these figures, a ladder workbench apparatus 10 according to the first embodiment of the present invention has left and right mounting brackets 11, 11 in the middle of a ladder 1 used, for example, at a work site of a residential building. It is mounted and fixed by a width stop member 15, and a work platform 17 for scaffolding is hung between the upper portions of the mounting brackets 11 and 11 so that work can be performed on the work platform 17.

The ladder 1 is provided with, for example, a hollow step bar 3 on which the legs are hung at regular intervals between the left and right columns 2, 2.
Moreover, holes 4 and 4 communicating with the hollow of the step rail 3 are provided on the side surfaces of the left and right columns 2 and 2. The mounting brackets 11 are formed in the same shape on the left and right sides, and are freely rotatable so as to support the base mounting member 12 inserted into the upper hole 4 of the ladder 1 and mounted, and the base mounting member 12 from the lower side. And a support member 13 that is inserted into and attached to the lower hole 4 of the ladder 1. The platform mounting member 12 is made of, for example, a metal material as a whole, and is a horizontal first pipe 12 on which the work platform 17 is hung.
a, and a second pipe 12b attached to one end of the pipe 12a at a right angle to the column 2 in the horizontal direction,
The insertion rod 12c attached to the end of the pipe 12b and inserted into the hole 4 of the column 2 of the ladder 1, and the first pipe 12a.
A third pipe 12d in which the lower end portion of a support rod 14 for attaching a handrail or the like to the other end portion is inserted and fixed by a bolt 12e, and a link for supporting the middle of the first pipe 12a from below. And a part 12f. The support member 13 is made of, for example, a metal material as a whole,
A slanted first pipe 13a for supporting the table mounting member 12 from below, and a support 2 at one end of this pipe 13a.
Second pipe 1 mounted at a right angle to the horizontal
3b and a ladder 1 attached to the end of this pipe 13b
Of the insertion rod 13c inserted into the hole 4 of the support column 2 and an adjustment rod 13d whose one end side is rotatably connected to the link portion 12f and the other end is adjustably inserted into the first pipe 13a.
And a fixing portion 13e for fixing the adjustment position of the adjusting rod 13d on the first pipe 13a, and a bolt 13f projectingly provided for mounting the width stop member 15 on the first pipe 13a. Such a mounting bracket 11 is, for example, a ladder 1 hung on a building or the like at a work site, which is slanted, and an insertion rod 12c of a platform mounting member 12 of the ladder 1 from a side surface of a column 2 of the ladder 1 into a hole 4. Insert the insertion rod 13c of the support member 13 into the hole 4 on the lower side (for example, two lower steps), adjust the length of the adjustment rod 13d so that the first pipe 12a is substantially horizontal, and fix it with the fixing portion 13e. It is installed by fixing.

The width stop member 15 is made of, for example, an elongated metal plate material and has a pair of holes 15a, 15a for inserting bolts formed at the ends thereof, and the left and right mounting brackets 11 attached to the ladder 1. , 11 bolts 13f, 13f
Is inserted into the holes 15a, 15a, and the nuts 16, 16 are tightened and fixed. The support rod 14 is made of, for example, a material such as a metal pipe. The lower end portion of the support rod 14 is inserted into the third pipe 12d and fixed by tightening the bolt 12e. The upper end portion is attached with a handrail or rope for safety. The portion 14a is provided. The workbench 17 has a work tread 17a formed in a substantially rectangular shape, and the ladder 1 of the tread 17a
On the side surface in the direction along the step rail 3 of the side plates 17b, 17b, both end sides of which are longer than the step plate 17a and protrude in the horizontal direction.
Is provided, and hooking portions 17c, 17c for attaching to the first pipe 12a of the base mounting member 12 are formed at both ends of the side plates 17b, 17b.

In the ladder workbench apparatus 10 having the above-described structure, the left and right mounting brackets 11, 11 are respectively installed in the middle of the ladder 1 used at a work site of a residential building, etc. , 12c are inserted into the holes 4 and 4 from the side surfaces of the columns 2 and 2, and the insertion rods 13c and 13c of the support members 13 and 13 are inserted into the lower holes 4 and 4 to adjust the adjustment rod 1
3d and 13d are attached by adjusting the lengths so that the first pipes 12a and 12a are substantially horizontal and fixing them with fixing portions 13e and 13e, and the width stop member 15 is attached to the bolts 13f and 1d.
3f is fixed by tightening the mounting nuts 16 and 16 and then the hooking portions 17c and 17c of the workbench 17 are attached to the left and right first parts.
The pipes 12a, 12a of the support rods 14, 14
A rope or the like is passed to the attachment portions 14a, 14a of the above, and both ends thereof are tied to the left and right columns 2, 2 of the ladder 1. Therefore, the holes 4 provided in the columns 2 and 2 of the ladder 1
Left and right mounting brackets 1 at any position using 4
Since 1, 1 can be attached, a scaffold for work can be easily provided. Further, the left and right mounting brackets 11, 11 are fixed by the width stop member 15 on the lower side and hooked by the work table 17 on the upper side, so that they do not come out of the holes 4, 4 of the ladder 1 and are stable. Can be installed. Furthermore, the mounting bracket 1
1 is mainly made of a material such as a pipe material and has the same structure on the left and right, so that it is easy to handle, easy to manufacture and inexpensive.

5 and 6 are views for explaining the ladder workbench of the second embodiment of the present invention. FIG. 5 is an exploded perspective view of the left mounting bracket, and FIG. 6 is a sectional view of the mounting bracket. is there. The parts and members corresponding to those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In these figures, the ladder workbench apparatus 20 of the second embodiment utilizes the holes 4 and 4 of the ladder 1 as in the first embodiment, and the left and right mounting brackets 21 and 21 are mounted.
Is attached, the lower side is fixed by the width stop member 15, and the workbench 17 is hooked on the upper side.

The mounting bracket 21 is made of a metallic material as a whole, and is made up of a holding member 22 provided along the columns 4 of the ladder 1 and a pipe material protruding from the front side of the upper end of the holding member 22. A base mounting member 23, a support member 24 made of a pipe material fixed between the front side of the lower end of the holding member 22 and the lower end of the base mounting member 23;
The upper insertion rod 25 is attached so as to project toward the support column 2 on the upper side of the holding member 23, and is vertically adjustable so as to project toward the support column 2 on the lower side of the holding member 23. And a pipe 27 for fixing the lower end portion of the support rod 14 and the like.
The holding member 22 is, for example, the two-stepped crosspieces 3, 3 of the ladder 1.
Pipe material 22a having a square cross section that is slightly longer than the interval
It has a hole on the upper side and the upper insertion bar 2
5 is attached, and reinforcing plates 22b, 22 are provided on both sides on the lower side.
Long holes 22c and 22c are formed in the longitudinal direction by attaching b, and the lower insertion rod 26 is attached to the long holes 22c and 22c so as to be positionally adjustable in the longitudinal direction. The upper and lower insertion rods 25 and 26 are stepped portions 25a, 25b and 26a, 26 for holding the pipe material 22a, respectively.
b is formed, and step portions 25c and 26c for contacting the end surface of the hole 4 of the ladder 1 are formed. Further, a bolt 22d for attaching the width stop member 15 similar to that of the first embodiment is provided in a protruding manner on the lower front side of the pipe material 22a. The support member 23 is attached so as to be substantially horizontal when mounted on the inclined ladder 1.

In the ladder work table device 20 having the above-described structure, the left and right mounting brackets 21 and 21 are respectively inserted in the middle of the ladder 1, and the upper insertion rods 25 and 25 are respectively formed in the holes 4 and 4 from the side surfaces of the columns 2 and 2. When inserting, the lower insertion rods 26, 26 are vertically moved along the long holes 22c, 22c and inserted into the lower holes 4, 4, and the width stop member 15 is attached to the bolts 22d, 22.
The work table 17 is mounted and fixed to the d, and the work table 17 is hooked on the left and right table mounting members 23, 23, and the mounting portion 1 of the support rods 14, 14 is attached.
Rope or the like is passed to 4a and 14a as necessary, and both ends thereof are tied to the left and right columns 2 and 2 of the ladder 1. Therefore, as in the first embodiment, the left and right mounting brackets 21 and 21 can be attached at arbitrary positions by utilizing the holes 4 and 4 provided in the columns 2 and 2 of the ladder 1. A scaffold for work can be easily provided. In addition, the left and right mounting brackets 21 and 21 have a width stop member 15 on the lower side.
Since the upper part is fixed by the work table 17 and is hooked by the work table 17, the ladder 1 can be stably mounted without coming out from the holes 4 and 4. Further, since the mounting bracket 11 mainly uses a material such as a pipe material and has the same structure on the left and right, it is easy to handle, easy to manufacture and inexpensive.

7 and 8 are views for explaining a ladder workbench according to a third embodiment of the present invention. FIG. 7 is an exploded perspective view of a left mounting bracket, and FIG. 8 is a lower side of the mounting bracket. FIG. 6 is an enlarged view of an adjustment section portion. The parts and members corresponding to those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In these figures, the ladder workbench apparatus 30 of the third embodiment has a shaft 3 in the upper and lower holes 4 and 4 of the ladder 1.
3, 33, and cap portions 33, 33 on both ends thereof
Is mounted, the left and right mounting brackets 31, 31 are mounted using the cap portions 33, 33, and the workbench 17 is hooked on the upper side.

The mounting bracket 31 is made of a metallic material as a whole, and has a base mounting member 34 to which an upper clamp portion 35 is mounted on one end side and a pipe 12d is mounted on the other end side, and a mounting bracket 34 is mounted on one end side. The side clamp part 37 is attached via the adjusting part 38, and the other end side is composed of a supporting member 36 connected to the lower end of the tip of the base attaching member 34 via a link part 34a. The adjusting portion 38 is such that the adjusting block 38 having a plurality of adjusting grooves 38a formed therein is attached to the clamp portion 37, and the pin 38b provided at the lower end portion of the support member 36 is inserted into the adjusting groove 38a. By moving the position of the pin 38b to any one of the plurality of adjustment grooves 38a or changing the tightening angle of the clamp portion 37, the support member 36 can be slightly moved up and down to horizontally adjust the base mounting member 34. ing.

The shaft 32 is formed to have a length projecting to both sides from the holes 4 and 4 of the left and right struts 2 and 2 to the same extent, and pipe-shaped cap portions 33 and 33 are inserted at both ends thereof. Installed. The stopper portion 3 is provided at the end of the cap portion 33 to prevent the clamp portions 35 and 37 from being pulled out.
3a is formed.

In the work table device 30 for a ladder having the above-mentioned structure, the shafts 32, 32 are inserted into the upper and lower holes 4, 4 in the middle of the ladder 1, and the cap parts 33, 33, 33, 33 are attached to both ends of the ladder work device 30. Tighten the mounting brackets 31 and 31 with the upper clamp portion 35 and the upper cap portion 33, respectively.
The lower clamp portion 37 is tightened and attached to the lower cap portion 33, and the work table 17 is attached to the left and right table mounting members 34, 34.
To the mounting portions 14a, 14 of the support bars 14, 14
If necessary, a rope or the like is passed to a, and both ends thereof are tied to the left and right columns 2 and 2 of the ladder 1. At this time, the position of the pin 38b is moved to one of the adjustment grooves 38a so that the base mounting member 34 becomes horizontal, or the clamp portion 37 is moved.
Change the tightening angle of. Therefore, similarly to the first embodiment, the left and right mounting brackets 31, 31 can be attached at arbitrary positions by utilizing the holes 4, 4 provided in the columns 2, 2 of the ladder 1. A scaffold for work can be easily provided. Also, the left and right mounting brackets 31, 3
1 is a shaft 32, 3 whose upper and lower sides are inserted through the holes 4, 4 of the ladder 1.
The clamp parts 35 and 37 are tightened and attached to the cap parts 33 and 33 provided at both ends of the work table 1, and the upper side is the workbench 1
Since it is hooked by 7, it does not come out of the holes 4 and 4 of the ladder 1 and can be stably mounted. Further, since the mounting bracket 31 is mainly made of a material such as a pipe material and has the same structure on the left and right, it is easy to handle, easy to manufacture and inexpensive.

FIG. 9 is a view for explaining a fall prevention device according to the fourth embodiment of the present invention.

The fall prevention device 40 of the fourth embodiment is
A device for preventing the ladder 1 from falling over by mounting the ladder work bench device of each of the embodiments on the wall surface 7 of the eaves 6 of the building. The upper end side of the ladder 1 is hung on the wall surface 7 of the eaves 6, For example, a pair of parallel support shafts 4 fixed to the upper step rail 3 (upper and lower two places) by reinforcing plates 44 and 45 on the upper and lower sides, for example.
1, 41 are attached by a first clamp portion 42 and a second clamp portion 43 so that the vertical position can be adjusted, and a pair of support members are provided on the upper end portions of the support shafts 41, 41 via link portions 46, 49. The members 47, 47 are attached so as to be able to fix the turning angle, and the support members 47, 47 are provided with an abutting member 48 formed of, for example, a pipe material in a ring shape on the upper portion thereof. The first clamp portion 42 is fastened to the step rail 3, and the second clamp portion 43 is fastened to the support shaft 41.

When the ladder 1 is hung on the wall surface 5 under the eaves 6, the overturn preventing device 40 having the above-described structure is arranged so that the vertical position of the pair of support shafts 41, 41 clamped to the step bar 3 by the first clamp portion 42 is changed to the first position. The clamp member 43 is adjusted by the second clamp member 43, and the contact members 48 are fixed by adjusting the angles so that the contact members 48 contact the lower surface of the eaves 6 by the link members 46 and 49. In addition, the portion where the upper end of the ladder 1 abuts on the wall surface 5 and the abutting member 48 are under the eaves 6.
The protective member 7, 7 such as a soft cloth or a cushion material is interposed and abutted on the portion abutting on the lower surface of the protective member 7 so as not to damage it. In this fall prevention device 40, since the contact member 48 is in contact with the lower surface of the eaves lower 6, it does not fall down,
Further, since the ladder 1 is hung by interposing the protective members 7 and 7, the wall surface 5 and the lower surface of the eaves 6 are not damaged, so that it is suitable for the ladder 1 equipped with the ladder work bench device. Become.

FIG. 10 is a view for explaining a fall prevention device according to the fifth embodiment of the present invention.

The fall prevention device 50 of the fifth embodiment is
A device for preventing the ladder 1 from tipping over when the handrail 8 or the like is provided on the roof of the building, and is an upper hook portion 51a formed in a downward U shape to be hung on the upper portion of the handrail 8,
And a lower hooking portion 51b formed in a U-shape facing upward, which is hung on the uppermost step 3 of the ladder 1, has a mounting member 51 integrally formed of a metal plate or the like, and the inside of the upper hooking portion 51a. The stopper 52 is provided on the front side of the upper end of the handrail 8. The upper hook portion 51a and the portion of the stopper 52 that comes into contact with the handrail 8 are
Protective members 51c and 52a made of a flexible material are provided so as not to damage the handrail 8.

When the handrail 8 is provided on the roof of the building, the fall prevention device 50 having the above-described structure hooks the upper hook portion 51a of the mounting member 51 on the upper portion of the handrail 8 to set the uppermost step rail of the ladder 1. 3 is hooked on the lower hook 51b. In this fall prevention device 50, the upper catch 51a formed in a U-shape is hung on the upper part of the handrail, and the uppermost step rail 3 of the ladder 1 is hung on the lower catch 51b. There is also no protection member 51
Since the ladder 1 is hung via the c and 52a, the handrail 8
Since it is not damaged, it is suitable for the ladder 1 equipped with the ladder workbench device.

Although an example in which each part of the ladder work table device 10, 20, 30 of each of the above-described embodiments is formed of a pipe material or the like has been described, it may be formed of other plate material or rod material and has a shape. Can be arbitrary and is not limited to the embodiment. Further, when the ladder 1 is not provided with the holes 4 and 4, the mounting bracket may be mounted in a structure in which the mounting bracket is clamped to the column 2 or the step rail 3.

[0031]

As described above, the ladder workbench apparatus of the present invention is mounted horizontally on the left and right pillars of the ladder, and is mounted so as to support the base mounting member from the lower side. Equipped with left and right mounting brackets having supporting members and a work platform for scaffolding that is hooked between the upper parts of the left and right platform mounting members, anyone can easily and safely use it and improve work efficiency. Can be manufactured at low cost.

Further, by mounting the fall prevention device on the end portion side of the ladder, the ladder equipped with the ladder work bench device can be safely used.

[Brief description of drawings]

FIG. 1 is a perspective view of a ladder workbench apparatus according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the ladder workbench apparatus according to the first embodiment of the present invention.

FIG. 3 is an exploded perspective view of the left mounting bracket according to the first embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view of the insertion portion of the mounting bracket of the first embodiment of the present invention into the ladder.

FIG. 5 is an exploded perspective view of a left mounting bracket according to a second exemplary embodiment of the present invention.

FIG. 6 is a sectional view of a mounting bracket according to a second embodiment of the present invention.

FIG. 7 is an exploded perspective view of a left mounting bracket according to a third exemplary embodiment of the present invention.

FIG. 8 is an enlarged view of a lower adjustment portion of a mounting bracket according to a third embodiment of the present invention.

FIG. 9 is a diagram illustrating a fall prevention device according to a fourth embodiment of the present invention.

FIG. 10 is a diagram illustrating a fall prevention device according to a fifth embodiment of the present invention.

[Explanation of symbols]

1 ladder 2 props 3 steps 4 holes 5 wall surfaces 6 eaves below 7 Protective material 8 handrails 10 Ladder workbench device 11 Mounting bracket 12 units mounting member 13 Support members 14 Support rod 15 Width stop member 16 nuts 17 Workbench 20 Work table equipment for ladders 21 Mounting bracket 22 Holding member 23 mounting members 24 Support member 25 Upper plug 26 Lower insertion rod 27 pipes 30 Ladder workbench equipment 31 Mounting bracket 32 axes 33 Cap 34 units mounting member 35 Clamp part 36 Support member 34a link part 37 Clamp part 38 Adjustment unit 38a Adjustment groove 38b pin 40 Fall prevention device 41 Support shaft 42,43 Clamp part 44, 45 Reinforcing plate 46,49 Link section 47 Support member 48 Abutment member 50 Fall prevention device 51 Mounting member 51a Upper hook part 51b Lower hook 51c protection member 52 Stopper 52a protection member

Claims (5)

[Claims] 1. A table mounting member that is horizontally mounted by inserting an insertion rod into upper holes provided on the left and right column sides of a ladder, and is rotatable so as to support the table mounting member from the lower side. Left and right mounting brackets that are connected and have a supporting member that is mounted by inserting an insertion rod into the lower hole of the ladder, and a work platform for scaffolding that is hooked between the upper parts of the left and right platform mounting members. A workbench device for a ladder, comprising: 2. A holding member provided along a ladder column, a base mounting member horizontally projecting from a front side of an upper end of the holding member, and a front side of the lower end of the holding member and the base mounting member. A support member fixed between the tip and the lower side of the tip, an upper insertion rod that is attached so as to project toward the upper pillar side of the holding member and is inserted into the upper hole, and a lower side of the holding member. Work for scaffolding that is hooked between the left and right mounting brackets that have lower insertion rods that are attached so as to project toward the column side and that are inserted into the lower holes, and the upper portions of the left and right platform attachment members. A workbench device for a ladder, comprising: 3. An upper and lower shaft inserted into the upper and lower holes of the ladder by projecting both end sides thereof, and a clamp portion for tightening the end portion of the upper shaft at one end side thereof is attached horizontally. The table mounting member is provided so as to project, and a clamp portion for tightening the end portion of the lower shaft is mounted on one end side, and the other end side has a supporting member rotatably connected to the lower end portion of the table mounting member. A workbench apparatus for a ladder, comprising: left and right mounting brackets; and a workbench for a scaffold that is hooked between the upper portions of the left and right platform attachment members. 4. A fall prevention device, which is provided with a contact member for contacting under the eaves of a building so as to be rotatable, on the upper side of the ladder. Three
Workbench device for the described ladder. 5. A fall prevention device having an attachment member having an upper hook portion for hanging on an upper portion of a roof handrail of a building and a lower hook for hanging on an uppermost step rail of the ladder is attached to an upper side of the ladder. The workbench apparatus for a ladder according to claim 1, 2 or 3, wherein.