JP2001152659A - Portable workbench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable workbench which can bring about drastic improvements in working safety, and therefore improvement in working efficiency, without having to change the structure and light weight of a conventional portable workbench. SOLUTION: A portable scaffold is constituted of a rectangular top board, ladder-like main legs collapsibly attached to the top board, and gripping members attached to the top board or the main legs in a collapsible manner. Furthermore, in the portable scaffold, detachable handrails are attached to the long sides and/or short sides of the rectangular top board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable workbench used for construction work sites, interior and exterior work such as ceilings and walls of buildings, electric wiring work, etc. More specifically, a ladder is mounted on a rectangular top plate. Field of the Invention The present invention relates to an improvement of a portable worktable provided with a main leg in a shape that can be folded.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 17, ladder-shaped main legs 4, 4 having steps 5 are provided on a rectangular top plate 3 for work on ceilings, walls and the like of buildings and the like. A workbench (scaffold) 2 is used. (Actual opening Hei 6-56321
No.)

The work table 2 is usually of a portable type. After use, the stay 7 attached between the top plate 3 and the step 5 is bent at a bent portion 8 so that the work table 2 can be folded and moved. It has become.

The work table of this type is applied to a work table having a height of less than 2 m from the viewpoint of safety, and safety measures such as non-slip are applied to a top plate serving as the work floor. However, when carrying out the work with the hand necessary for the work on the ceiling or the wall, the work lacks stability and often causes a fall accident.

In order to solve this problem, as shown in FIG. 18, in a portable worktable 2 having ladder-shaped main legs 4 and 4 provided on a top plate 3 so as to be foldable, the top plate 3 or the main legs 4 may be used. On the upper part of the portable workbench 1, a handhold member 6 functioning as a handhold at the time of elevating is rotated in the A direction or the B direction, and is mounted so as to be foldable along the main leg 4 or the top plate 2. ing. (Japanese Patent No. 2989166, No. 2989
No. 172)

However, even when using a workbench provided with such a handle member, the operator's feet become inattentive in the interior work, exterior work, electric wiring work, etc., especially when the work is concentrated on the upper side. In many cases, accidents in which the user steps off from the long side or the short side of the rectangular top plate during work are often experienced, and a worktable with higher safety is required.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems in a worktable provided with a ladder-like main leg foldable on a top plate. For example, the length is 1,300-1,800 mm,
A portable workbench with a width of about 250 to 500 mm and a height of about 2 m or less and a height of about 2 m or less can be mounted on the top without significantly changing the structure of the conventional portable workbench. An object of the present invention is to provide a portable workbench in which the safety of work when performing the work is greatly improved.

[0008]

According to a first aspect of the present invention, there is provided a portable workbench having a ladder-like main leg provided on a rectangular top plate so as to be foldable. In a portable worktable in which a handle member is foldably attached to a main landing gear, a detachable handrail is provided on a long side of a rectangular top plate.

A portable workbench according to a second aspect of the present invention is a portable workbench in which a ladder-like main leg is foldably provided on a rectangular top plate, and a handle member is foldably attached to the top plate or the main leg. A removable handrail is provided on the short side of the rectangular top plate.

A portable workbench according to a third aspect of the present invention is a portable workbench in which a ladder-like main leg is provided on a rectangular top plate so as to be foldable, and a handle member is foldably attached to the top plate or the main leg. , A removable handrail is provided on the long side and the short side of the rectangular top plate.

[0011] A portable workbench according to claim 4 of the present invention comprises:
In a portable worktable provided with a ladder-shaped main leg foldably provided on a rectangular top plate, a detachable end scaffold is continuously provided on a short side of the rectangular top plate, wherein: 5. The portable worktable according to claim 5, wherein the handle member is foldably attached to the top plate or the main leg in the portable worktable according to claim 4, and the long side and / or the short side of the rectangular top plate. A handrail that can be attached to and detached from the vehicle.

A portable work table according to a sixth aspect of the present invention is a portable work table in which a ladder-like main leg is foldably provided on a rectangular top plate, and a handle member is foldably attached to the top plate or the main leg. A plurality of rectangular top plates are arranged so that short sides thereof are opposed to each other, and a workbench is connected in a longitudinal direction with an intermediate scaffold interposed between the short sides of the opposed top plates. The portable worktable is characterized in that, in the portable worktable according to the sixth aspect, a removable handrail is provided on a long side and / or a short side of the rectangular top plate.

The portable workbench according to the present invention is a portable workbench having a ladder-shaped main leg provided on a rectangular top plate so as to be foldable, and a handle member mounted on the top plate or the main leg so as to be foldable, 10. The work table is connected in the width direction by arranging a plurality of rectangular top plates so that long sides thereof are opposed to each other, and connecting an intermediate scaffold between the long sides of the opposed top plates in the width direction. The portable work table is characterized in that, in the portable work table according to claim 8, a removable handrail is provided on a long side and / or a short side of the rectangular top plate.

Further, in the portable workbench according to the tenth aspect, a ladder-like main leg is provided on a rectangular top plate so as to be foldable, and a detachable handrail is provided on a long side of the rectangular top plate. In the portable workbench, a vertical portion abutting on the long side wall of the top plate under the vertical rail of the handrail, and a long side intermediate wall of the top plate extending from the vertical portion and located inside the long side wall. A fixing member having a rising portion fitted into the groove formed by the fixing member is provided, and a plate-shaped member abutting on the upper surface of the top plate is provided, and a long side end portion of the top plate is formed by the plate member and the fixing member. Sandwich
A handrail is attached to a long side of the top plate by connecting the plate-shaped member and the top plate with a pin, and the portable work table according to claim 11 is a portable work table according to claim 10, The handle member is foldably attached to the top plate or the main landing gear.

In the work table of the present invention, members such as a top plate, a main leg, a handle member, a handrail, an end scaffold, and an intermediate scaffold may be made of a lightweight steel material, FRP, or another material depending on the use mode. However, in consideration of lightness, corrosion resistance, handleability, and the like, it is most preferable to use an extruded aluminum (including alloy) material or a combination of an extruded aluminum material and an aluminum plate material.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the portable workbench of the present invention will be described below. The same members and common members as those in the related art are denoted by the same reference numerals. These embodiments are merely examples of the present invention, and the present invention is not limited to these embodiments.

As shown in FIG. 1, a first mode of attaching a handrail according to the present invention is such that ladder-like main legs 4 and 4 are provided on a rectangular top plate 3 so as to be foldable. Portable worktable 1 with handle member 6 foldably attached to 4
, A removable handrail 11 is provided on the long side 9 of the rectangular top plate 3. Reference numeral 5 denotes a step of the ladder-like main leg 4, and reference numeral 7 denotes a stay 7 attached between the top plate 3 and the step 5, so that the work table 1 can be folded and moved by bending the stay 7 at a bent portion. Has become. In this case, it is preferable that the handle member 6 is attached to the corner of the top plate 3 or the upper part of the main leg 4.

As shown in FIG. 1, the handrail 11 can be provided so as to oppose both long sides 9 of the top plate 3. However, when performing work on a wall surface or the like, one long side of the top plate 3 is used. In a case where the side is used close to the wall surface, the handrail 10 may be provided only on the long side side opposite to the long side that abuts the wall surface. Selected.

To fix the handrail 11 to the long side 9 of the top plate 3,
As shown in FIG. 2, the fixing is performed by providing a fixing member 13 below the vertical rail 11B extending from the horizontal rail 11A of the handrail 11. For example, the vertical portion 13A of the fixing member 13 is fixed to the lower portion of the vertical bar 11B by a bolt, a nut or the like (not shown) by an appropriate means, and the rising portion 13B extending from the vertical portion 13 of the fixing member 13 is indicated by a chain line. As shown in the figure, the lower plate is brought into contact with the lower surface of the top plate 3 and a plate-like member 14 made of an L-shaped metal fitting is fixed to the vertical bar 11B of the handrail 11 and the top plate 3 by means such as bolts and nuts. The handrail 11 is detachably attached to the long side 9 of the top plate 3.

Another fixing method of the handrail 11 to the long side 9 of the top plate 3 is shown in FIGS. As shown in FIGS. 3 and 6,
On the long side 9 side of the top plate 3, a long side wall 9A and a long side wall 9A
A long side intermediate wall 9B located inward from the side is provided. FIG. 3-
As shown in FIG. 5, a vertical portion 13C abutting on the long side wall 9A of the top plate 3 and a long side intermediate wall 9B extending from the vertical portion 13C are formed below the vertical rail 11B of the handrail 11. Member 1 having a rising portion 13D fitted into a groove 15 to be fixed
3 is provided by attaching, for example, bolts and nuts or rivets, and a plate-like member 14 such as an L-shaped metal fitting that contacts the upper surface of the top plate 3 is provided by attaching, for example, bolts, nuts, or rivets, and is shown in FIG. As described above, the long side end portion of the top plate 3 is sandwiched between the plate member 14 and the fixing member 13, the holes H formed in the plate member 14 and the top plate 3 are aligned, and the pin P The handrail 11 is attached to the long side 9 side of the top plate 3 by passing through.

The pin P is, as shown in FIGS.
It is convenient to attach it to one vertical rail 11B by a suitable means such as a wire. The handrail 11 can be removed by removing the pin P. In this fixing method, the handrail 11 is freely installed at any position on the long side 9 side of the top plate 3 by forming the long side intermediate wall 9B continuously in the longitudinal direction of the top plate 3. It becomes possible. Also,
When the handrail 11 is attached by this fixing method, when a worker puts on the top 3, the handrail 11
Has a function of preventing the handrail 11 from coming off.

The mounting of the top plate 3 on the long side 9 side is as follows.
This can be performed by a method as shown in FIG. In the mounting method shown in FIG. 7, the pin P is mounted so as to protrude above the top plate 3 by the action of the spring 32, and when the handrail 11 is installed, the plate-shaped member 14 is opposed to the action of the spring 32. When the pin P is pressed down and inserted into the upper surface of the top plate 3, the pin P returns upward when the hole H of the top plate 3 reaches the position of the pin P, and the plate member 14 is fixed.

In the present invention, as a second embodiment, a detachable handrail 12 may be provided on the short side 10 side of the rectangular top plate 3 in the portable worktable 1 on which the handle member is foldably mounted. it can. Further, as a third embodiment, handrails can be provided on both the long side 9 side and the short side 10 side of the top plate 3.

FIG. 8 shows an example of a method of fixing the handrail 12 to the short side 10 of the top plate 3. In FIG. 8, fixing members 16 and 16 are fixed to the lower part of the vertical rail 12B of the handrail 12, and a pair of top plate sandwiching members 17 and 17 are provided at an intermediate portion. As shown by a dotted line in FIG. Bending part 1 of fixing members 16, 16
8 and 18 are fitted to a pair of vertical members of the main leg 4,
The short sides 10 of the top plate 3 are sandwiched between the top plate holding members 17, 17, and the top plate 3 is provided with appropriate means such as bolts, nuts, and pins through the holes H formed in the top plate holding member 17 and the top plate 3. The handrail 12 is attached by fixing the top plate holding member 17 to 3. The handrail 12 can be removed by releasing the fixation of the top plate 3 and the top plate holding member 17.

In the present invention, as shown in FIG. 9, by connecting the end scaffold 19 to the short side 10 side of the top plate 3, for example, the wall work performed in such a manner that the longitudinal direction of the worktable is opposed to the wall surface. In this case, the gap between the workbench and the wall surface can be eliminated, and a fall accident during work at the (longitudinal) end of the workbench 1 can be prevented. In addition, the work area in the longitudinal direction of the scaffold base can be easily increased, and the work area can be expanded.

As an embodiment of the present invention, as shown in FIG. 9, handrails can be provided together with end scaffolds 19 connected to each other. In FIG. 9, handrails 1 are attached to both long sides of the top plate 3.
1, the handrail 11 may be provided only on one long side depending on the usage. Also, the handrail 12 can be attached only to the short side of the top plate 3.
Handrails 12 can be provided side by side on the long side and the short side.

As shown in FIG. 10, for example, as shown in FIG. 10, the end scaffold 19 has legs 22, 22 each having an end scaffold fixing member 20, and the groove 21 of the end scaffold fixing member 20. Attach to step 5 of the main landing gear of the workbench,
The end of the end scaffold 19 is superimposed on the short piece 10 of the top plate 3 so as to be at the same level as the top plate 3, and is fixed to the top plate 3 through a hole H by an appropriate means such as a bolt and a nut. Further, it is convenient to fix the end scaffold 19 to the top plate 3 by inserting a pin P attached to the end scaffold 19 by a suitable means such as a wire into the hole H.

In the present invention, as shown in FIGS. 11 and 12, an intermediate scaffold 23 is interposed between the worktables 1 and connected in the longitudinal direction or the width direction to extend the work surface in the longitudinal direction or the width direction. Can be used. When the work table 1 is used in the longitudinal direction with the intermediate scaffold 23 interposed therebetween, FIG.
As shown in FIG. 1, the handrails 11, 1 on the long side 9 side of the top plate 3, 3
By connecting 1 with the connecting member 24 and continuing the handrail on the long side of the top plate, it is possible to perform a wide range of work such as wall work during interior / exterior construction while ensuring safety.

As shown in FIG. 12, when the workbench 1 is used by being connected in the width direction with an intermediate scaffold 23 interposed therebetween,
The handrails 11, 11 on the long side of the top plates 3, 3 are connected to the connecting members 24,
24, the short side of the top plate is also surrounded and the connecting member 25,
25 functions as a handrail, and can secure safety in all directions on a wide work surface. The attachment of the handrail in these embodiments is not limited to those illustrated in FIGS. 11 and 12, and the attachment to the long side of the top plate and the attachment to the short side may be appropriately performed according to the use mode of the scaffold. Selection and combination can be implemented.

Further, in the present invention, as shown in FIG. 13, the work table 1 may be connected in the longitudinal direction and the width direction with a number of intermediate scaffolds 23 interposed therebetween. Handrails 11 and 12 are attached to the side and short side, respectively, and the handrails 11 and 12 are connected to connecting members 24 and 2 respectively.
5 to form a continuous handrail. In addition, FIG.
The handle member 6 is omitted.

As shown in FIG. 11, the work table 1 is connected to the work table 1 in a longitudinal direction by connecting a plurality of work tables 1 and 1 to a rectangular top plate 3.
3 are arranged so that the short sides thereof are opposed to each other, and the intermediate scaffold 23 is arranged between the short sides of the opposed top plate. As shown in FIG. The tables 1 and 1 are arranged so that the long sides of the rectangular top plates 3 and 3 are opposed to each other, and the intermediate scaffold 23 is provided between the long sides of the opposed top plates.

In the embodiment in which the intermediate scaffold 23 is attached to the top plate 3 of the work table 1, as shown in FIG.
Attachment member 26 is fixed to the edge of fixing member 3 with fixing means F such as bolts, nuts, and rivets.
Are superimposed to form a hole H corresponding to the superposed portion, and the pin 27 is inserted into the hole H.

As shown in FIG. 14, the pin 27 includes a head 28 having a cutout 30 in a part thereof, an insertion portion 29, and an intermediate portion 31 smaller in diameter than the head 28, so that the pin 27 can be easily inserted into the hole H. At the same time, it can be easily pulled out by inserting a screwdriver into the notch 30 and lifting it up, which helps to improve the workability when the workbench is folded or moved.

This pin 27 is used for the handrail 1 shown in FIGS.
The plate-like member 14 and the top plate 3 are connected to each other when the base plate 1 is fixed to the long side 9 of the top plate 3, and the handrail 12 and the short side 10 of the top plate 3 shown in FIG.
In connection with the top plate holding members 17 and 17 and the top plate 3 in connection with the side, and also in the end scaffold 19 connected to the top plate 3 shown in FIG.

As another embodiment in which the intermediate scaffold 23 is attached to the top plate 3 of the work table 1, as shown in FIG.
At one edge of the intermediate scaffold 23, a short pin member 33B is provided, and a mounting member 26B having an inclined surface 34 formed at the lower portion and opened outward is fixed by a fixing means such as a bolt, a nut, or a rivet. The intermediate scaffold 23 is fixed to the top plate 3 by inserting the pin member 33B into the hole H of the top plate 3 by inserting the pin member 33B into the hole H of the top plate 3 so that the intermediate scaffold 23 is slightly inclined and inserted along the inclined surface 34. Attach. In addition, intermediate scaffold 2
At the other end of the mounting member 3, a mounting member 26A provided with a long pin member 33A is fixed, and the top plate 3 and the mounting member 2 are fixed.
When polymerizing 6A, the intermediate scaffold 23 is attached by inserting the pin member 33A into the hole H of the top plate 3.

[0036]

Embodiments of the present invention will be described below. Example 1 Extruded aluminum material (material: A6063S and A6)
N01S) combined with a top plate (dimensions: 1500m long)
Using a ladder-shaped main leg made of extruded A6N01S material and a hand-held member, a workbench having a structure shown in FIG. 17 and having a maximum height of 1750 mm and an expansion / contraction width of the main leg of 400 mm was assembled.

An intermediate scaffold (dimensions: 1500 mm in length and 500 mm in width) formed by combining an aluminum extruded section (material: A6063S and A6N01S) with this worktable.
The work tables were connected by the method shown in FIG. 16 to form a work table as shown in FIG.

Next, as shown in FIG.
In accordance with the method shown in FIGS. 3 to 6, an aluminum alloy extruded material (material: A6063)
A handrail made of P) was attached, and the handrail was connected between the handrails by a connecting member 24 made of the same material as the handrail, thereby completing a work table.

When this work table was actually used for wall work at an interior construction site, the presence of handrails ensured the safety behind the work table, making it possible to work extremely safely and to improve workability. Was confirmed.

Example 2 Extruded aluminum material (material: A6063S and A6
N01S) combined with a top plate (dimensions: 1500m long)
Using a ladder-shaped main leg made of extruded A6N01S material and a hand-held member, a workbench having a structure shown in FIG. 17 and having a maximum height of 1750 mm and an expansion / contraction width of the main leg of 400 mm was assembled.

An intermediate scaffold (dimensions: 1500 mm in length and 500 mm in width) formed by combining an extruded aluminum material (material: A6063S and A6N01S) with this worktable.
The work tables were connected by the method shown in FIG. 16 to form a work table as shown in FIG.

Then, as shown in FIG. 12, an extruded aluminum alloy material (material) is formed on the opposite long side of the work surface including the top plate 3, the intermediate scaffold 23 and the top plate 3 according to the method shown in FIGS. : A6063S) to complete the workbench.

When this workbench was actually used for wall work at an interior construction site, the presence of handrails ensured safety behind the workbench, making it possible to work extremely safely and improve workability. Was confirmed.

[0044]

According to the present invention, in a portable workbench having a rectangular top plate, the work safety is greatly improved without greatly changing the structure and lightness of the conventional portable workbench. As a result, a portable workbench that can be expected to improve workability is provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a portable workbench according to the present invention.

FIG. 2 is a partial perspective view showing one embodiment of a method of fixing a handrail to a long side of a top plate according to the present invention.

FIG. 3 is a partial sectional view showing another embodiment of a method for fixing a handrail to a long side of a top plate according to the present invention.

FIG. 4 is a front view of a fixing member used in the fixing method of FIG.

FIG. 5 is a plan view of a fixing member used in the fixing method of FIG.

6 is a partial perspective view of a top plate used in the fixing method of FIG.

FIG. 7 is a partial sectional view showing still another embodiment of a method of fixing a handrail to a long side of a top plate according to the present invention.

FIG. 8 is a partial perspective view showing an embodiment of a method of fixing a handrail to a short side of a top plate in the present invention.

FIG. 9 is a perspective view showing a portable workbench provided with end scaffolds of the present invention in series.

FIG. 10 is a partial perspective view showing an embodiment of the end scaffolding continuous system according to the present invention.

FIG. 11 is a perspective view showing a portable workbench according to the present invention connected longitudinally via an intermediate scaffold.

FIG. 12 is a perspective view showing a portable workbench according to the present invention connected in the width direction via an intermediate scaffold.

FIG. 13 is a perspective view of a portable workbench according to the present invention connected longitudinally and widthwise via a number of intermediate scaffolds.

FIG. 14 is a partial cross-sectional view showing one embodiment of a method of connecting a top plate of a worktable and an intermediate scaffold according to the present invention.

FIG. 15 is a perspective view showing a pin for connecting the top plate and the intermediate scaffold.

FIG. 16 is a partial cross-sectional view showing another embodiment of the connection method of the work table top and the intermediate scaffold according to the present invention.

FIG. 17 is a perspective view showing a conventional portable workbench.

FIG. 18 is a perspective view showing a conventional portable workbench with a handle member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Portable work table 2 Conventional portable work table 3 Top plate 4 Main leg 5 Step 6 Hand member 7 Stay 8 Bending part 9 Top plate long side 9A Long side wall 9B Long side intermediate wall 10 Short top plate Side 11 Handrail 11A Horizontal rail 11B Vertical rail 12 Handrail 12B Vertical rail 13 Fixing member 13A Vertical part 13B Rise part 13C Vertical part 13D Rise part 14 Plate member 15 Groove part 16 Fixing member 17 Top plate clamping member 18 Bending part 19 End Part scaffold 20 End scaffold fixing member 21 Groove part 22 Leg part 23 Intermediate scaffold 24 Connecting member 25 Connecting member 26 Mounting member 27 Pin 28 Head 29 Insertion part 30 Notch 31 Intermediate part 32 Spring 33 Pin member 34 Slope H hole P pin F fixing means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toyoji Senda 1-8-5 Ebisu, Shibuya-ku, Tokyo 7A Toyo Building 7A Within GOP Co., Ltd. (72) Inventor Yuzo Funato 5-11-3 Shimbashi, Minato-ku, Tokyo No. Sumitomo Light Metal Industries Co., Ltd. (72) Inventor Hideo Hanada 5-11-3 Shimbashi, Minato-ku, Tokyo Sumitomo Light Metal Industries Co., Ltd. (72) Inventor Tamotsu Karasawa 3-chome, Nihonbashi Honcho, Chuo-ku, Tokyo 4-7 Inside Nihon Shoji Co., Ltd.

Claims (11)

[Claims] 1. A portable worktable in which a ladder-like main leg is foldably provided on a rectangular top plate and a handle member is foldably attached to the top plate or the main leg, and a long side of the rectangular top plate is provided. A portable workbench characterized by having a removable handrail on the side. 2. A portable worktable in which a ladder-like main leg is foldably provided on a rectangular top plate and a handle member is foldably attached to the top plate or the main leg, wherein a short side of the rectangular top plate is provided. A portable workbench characterized by having a removable handrail on the side. 3. A portable worktable in which a ladder-like main leg is foldably provided on a rectangular top plate and a handle member is foldably attached to the top plate or the main leg, and a long side of the rectangular top plate is provided. A portable workbench having detachable handrails provided on a side and a short side. 4. A portable worktable having a ladder-shaped main leg foldably provided on a rectangular top plate, wherein a detachable end scaffold is connected to a short side of the rectangular top plate. Features a portable workbench. 5. The portable workbench according to claim 4, wherein the handle member is foldably attached to the top plate or the main landing gear, and is attached to a long side and / or a short side of the rectangular top plate. A portable workbench characterized by having removable handrails. 6. A portable workbench having a ladder-shaped main leg provided on a rectangular top plate so as to be foldable and a handle member attached to the top plate or the main leg so as to be foldable, and a short side of the rectangular top plate. A portable workbench, wherein a plurality of worktables are arranged so as to face each other, and the worktables are connected in a longitudinal direction with an intermediate scaffold interposed between short sides of the opposed top plate. 7. The portable worktable according to claim 6, wherein a detachable handrail is provided on a long side and / or a short side of the rectangular top plate. Stand. 8. A portable worktable having a ladder-shaped main leg provided on a rectangular top plate so as to be foldable and a handle member attached to the top plate or the main leg so as to be foldable, and a long side of the rectangular top plate A portable workbench wherein a plurality of worktables are arranged so as to face each other, and the worktables are connected in a width direction with an intermediate scaffold interposed between the long sides of the facing top plate. 9. The portable worktable according to claim 8, wherein a detachable handrail is provided on a long side and / or a short side of the rectangular top plate. Stand. 10. A portable workbench having a ladder-shaped main leg provided on a rectangular top plate so as to be foldable and a detachable handrail provided on a long side of the rectangular top plate. In the lower part, a vertical portion that abuts on the long side wall of the top plate, and a rising portion that extends from the vertical portion and fits into a groove formed by the long side intermediate wall of the top plate located inside the long side wall. A fixing member provided with the fixing member, and a plate-shaped member abutting on the upper surface of the top plate is provided, and a long side end portion of the top plate is sandwiched between the plate-shaped member and the fixing member. A portable workbench characterized in that a handrail is attached to the long side of the top plate by connecting the handrail with a pin. 11. The portable workbench according to claim 10, wherein a handle member is foldably attached to the top plate or the main landing gear.