JP6645766B2 - Stepladder work table - Google Patents

Description

  The present invention relates to a stepladder-type worktable suitable for use in, for example, construction work sites, interior and exterior work such as ceilings and wall surfaces of buildings, and high-altitude work such as electric wiring work.

  As a stepladder type work table used for work at a high place, for example, in Patent Document 1, an upper part is rotatably mounted on a shaft, and a top plate is provided between a pair of ladder-like main legs inclined outward downward. An erected portable workbench is disclosed. In this portable worktable, a handrail is mounted above the top plate so as to project in the same direction as the top plate in order to ensure the safety of workers.

JP 2010-126968 A

  In the portable workbench disclosed in Patent Literature 1, the handrail is arranged in a direction in which the worker standing on the top plate mainly faces at the time of work, but the opposite side, in other words, the rear of the worker is left open. It has become. For this reason, the worker must perform the work while visually checking the end of the top plate on the side opposite to the direction in which the top plate protrudes, which causes a problem that the work efficiency is reduced.

  The present invention has been made in view of the above-described points, and has as its object to increase the work efficiency by surrounding a work space above a top plate.

The stepladder-type work table of the present invention, the upper part is rotatably mounted on the shaft, a pair of main legs inclined outward toward the lower side, a top plate erected between the pair of main legs, A frame member surrounding a work space above the top plate, wherein the pair of main legs includes a first main leg used for elevating and lowering, and a second main leg; A first frame member and a second frame member. The first frame member has a substantially U-shape, and both ends on the open side thereof are the first main leg or the second frame member. The second main leg is supported by the main leg, and is disposed so as to lie down on the top plate so as to face the second main leg side, and is located at a predetermined height on the second main leg side. The frame member has a substantially U shape, and both ends on the open side are supported by the first main leg or the second main leg, and the frame member faces the first main leg. First frame It is arranged so as also to stand than, and being located higher than the predetermined height by the first main leg.

  According to the present invention, work efficiency can be improved by surrounding the work space above the top plate. Moreover, by making the height surrounding the working space on one side of the pair of main landing gears different from the height surrounding the working space on the other side, it is easy to ascend and descend on the top plate, for example. Can be prevented from interfering with a tool bag or the like hanging on the waist.

It is a front view showing a stepladder type workbench concerning an embodiment. It is a side view showing a stepladder type workbench concerning an embodiment. It is a rear view showing a stepladder type workbench concerning an embodiment. It is a side view showing the state where the stepladder type workbench concerning an embodiment was folded up. It is a figure for explaining the example of composition which pivotally attaches the 2nd frame member by the bracket.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a front view showing a stepladder work table 1 according to the embodiment, FIG. 2 is a right side view, and FIG. 3 is a rear view. In the present application, the front and rear directions refer to the direction in which the worker standing on the top plate 20 mainly faces at the time of work, and the front side of the stepladder type work table 1 is indicated by Fr and the rear side is indicated by Rr as required.
The stepladder work table 1 includes a pair of main legs 10a and 10b, a top plate 20, and a first frame member 30 and a second frame member as frame members surrounding a work space S above the top plate 20. 40.

The upper portions of the pair of main legs 10a and 10b are rotatably mounted on the shaft via the rotating portion 11, and are inclined outward toward the lower side to function as so-called stepladders.
In the present embodiment, the pair of main legs includes a long first main leg 10a and a short second main leg 10b. Each of the first main leg 10a and the second main leg 10b is made of, for example, an aluminum alloy, and is formed in a ladder shape by attaching a step 13 between a pair of right and left columns 12 at appropriate intervals. As shown in FIGS. 1 and 3, in the first main leg 10 a and the second main leg 10 b, the pair of left and right columns 12 extend so as to widen downward at the lower portion, but extend vertically at the upper portion. It has a shape that extends straight.
The first main leg 10a and the second main leg 10b are rotatably attached to the lower side of the upper end of the first main leg 10a and the upper end of the second main leg 10b via the rotating portion 11. Is done. Therefore, the first main leg 10a extends above the rotating portion 11. When the stepladder type work table 1 is not used, the first main leg 10a and the second main leg 10b are folded around the rotating portion 11 so as to be parallel (see FIG. 4).

The top plate 20 is made of, for example, an aluminum alloy and is formed in a substantially flat shape. The top plate 20 is located at an intermediate position in the height direction of the pair of main legs 10a and 10b, specifically, at the lowermost part of a portion where the pair of left and right columns 12 extend vertically up and down. And functions as a work floor for the worker. Therefore, the work space S of the worker is formed above the top plate 20. The top plate 20 is maintained in a horizontal state by the base end 20a being rotatably mounted on the first main leg 10a and the tip 20b being placed on the step 13 of the second main leg 10b. Is done. Further, the top plate 20 is set such that the tip end 20b protrudes outward from the second main leg 10b (see FIG. 2).
A stay 21 is arranged below the top plate 20. The stay 21 has one end rotatably mounted on the lower side of the top plate 20 and the other end rotatably mounted on a step 13 attached to the second main leg 10b. Therefore, the stay 21 has a function of restricting the rotation of the top plate 20 when the pair of main legs 10a, 10b is rotated via the rotation portion 11. When the stepladder-type work table 1 is not used, the first main leg 10a and the second main leg 10b are linked with the folding movement of the first main leg 10a and the second main leg 10b to move between one end of the stay 21 and the top plate 20, and to The space between the end and the step 13 rotates, and the top plate 20 is folded so as to be substantially parallel to the first main leg 10a (see FIG. 4).

  When using the stepladder type work table 1, the second main leg 10b is directed to a work place such as a wall surface. In this case, since the top end 20b of the top plate 20 is made to protrude outward from the second main leg 10b, the top plate 20 can be arranged close to a work place such as a wall surface, and Performance can be improved. Further, since the worker moves up and down from the first main leg 10a, the first main leg 10a has a smaller interval between the steps 13 than the second main leg 10b, and the number of steps 13 is larger. (See FIGS. 1 to 3).

The first frame member 30 is made of, for example, an aluminum alloy and is formed to have a substantially U shape. Here, the substantially U-shape refers to a shape such as a U-shape or a U-shape, in which three of the four sides are closed and only one is open in a plan view.
The first frame member 30 is attached to the top plate 20 such that the ends on the open side are respectively attached to the upper ends of the columns 12 of the first main legs 10a via the brackets 31 and the tips 30a face forward. They are arranged parallel or slightly upward. The first frame member 30 may be disposed so as to lie on the top plate 20, and may be disposed slightly downward with respect to the top plate 20. Here, arranging the first frame member 30 so as to lie on the top plate 20 means that the first frame member 30 is at an angle of less than ± 45 ° with respect to a horizontal plane in a side view.
The first frame member 30 has a width (distance between both ends) substantially equal to the distance between the columns 12 of the first main leg 10a (see FIGS. 1 and 3), and the tip 30a has a top end. It is set so as to be located just above the front end 20b of the plate 20 or slightly above the front end 20b of the top plate 20.

When the stepladder work table 1 is not used, the first frame member 30 can be rotated so that the tip 30a faces downward and can be accommodated so as to be substantially parallel to the first main leg 10a (FIG. 4). See).
The bracket 31 has a state in which the front end 30a of the first frame member 30 is directed forward as shown in FIGS. 1 to 3 (hereinafter, referred to as a use state), and a first main leg 10a as shown in FIG. And a state of being accommodated so as to be substantially parallel (hereinafter, referred to as a housed state).
The first frame member 30 thus configured is disposed above the top plate 20 and further above the rotating portion 11. Specifically, the distal end 30a of the first frame member 30 is located at a height from above the knees of the worker standing on the top 20 to about the waist, for example, a height H1 of 550 mm or more and 900 mm or less from the top 20 ( See FIG. 1).

The second frame member 40 is made of, for example, a pipe material made of an aluminum alloy, and is formed to have a substantially U shape. Here, the substantially U-shape refers to a shape such as a U-shape or a U-shape, in which three of the four sides are closed and only one is open in a plan view.
The second frame member 40 is mounted on the first main leg 10a via brackets 41 at the ends on the opening side via the bracket 41, and the first frame member 40 is arranged such that the front end 40a faces rearward. It is arranged so that it stands up more than the member 30.
The width (distance between both ends) of the second frame member 40 is substantially the same as the distance between the columns 12 of the first main leg 10a (see FIGS. 1 and 3). It is set to be located just above the base end 20a of the plate 20 or slightly above the base end 20a of the top plate 20.

When the stepladder work table 1 is not used, the second frame member 40 can be turned forward to accommodate the first main leg 10a with the tip 40a facing upward (see FIG. 4). See FIG. 4).
The bracket 41 has a state in which the front end 40a of the second frame member 40 is directed rearward as shown in FIGS. 1 to 3 (hereinafter, referred to as a use state), and the first main leg 10a as shown in FIG. And a state of being accommodated so as to be substantially parallel (hereinafter, referred to as a housed state).
The second frame member 40 thus configured is disposed above the top plate 20 and further above the rotating portion 11. The first frame member 30 surrounds the work space S at a height H1 on the second main leg 10b side, whereas the second frame member 40 has a high height on the first main leg 10a side. The work space S is surrounded at a position (height H2) higher than the height H1. Specifically, the front end 40a of the second frame member 40 has a height of the back of the worker standing on the top plate 20 (height from above the waist to below the neck), for example, not less than 1000 mm and not more than 1500 mm from the top plate 20. It is located at height H2 (see FIG. 1).

  The work space S above the top plate 20 is surrounded by the first frame member 30 and the second frame member 40 as described above so that the work space S is equal in size to the top plate 20. Therefore, the worker standing on the top 20 can sense the size of the top 20 without looking at the end of the top 20. For example, when a part of the body approaches the first frame member 30 or the second frame member 40, it can be recognized that the user is working near the end of the top plate 20. In this way, the worker standing on the top 20 can sense the width of the top 20 without looking at the end of the top 20, so that the work can be performed safely and the efficiency of the operation can be increased. Can be achieved.

A configuration example in which the second frame member 40 is rotatably supported by the bracket 41 will be described with reference to FIG.
A hole 42 is formed in the side surface of the end of the second frame member 40 on the open side, and a shaft 43 provided on the bracket 41 is inserted into the hole 42 to support the shaft. As will be described later, the hole 42 is an elongated hole so as to have enough play to release the locking between the locking projection 44 and the notch 45.
Further, a rod member is provided on the second frame member 40 so as to penetrate the left and right side surfaces, and this rod member is used as the locking projection 44. Notches 45 are formed at two places on the upper edge 46 of the bracket 41 so that the locking projections 44 are locked. The two places where the cutouts 45 are formed are a position for holding the second frame member 40 in the used state and a position for holding the second frame member 40 in the housed state.
Further, a coil spring 47 for biasing the second frame member 40 is provided inside the second frame member 40. The coil spring 47 is disposed between the rod 43 serving as the locking projection 44 and the shaft 43, and applies a biasing force in a direction in which the locking projection 44 contacts the upper edge 46 of the bracket 41.

When the use state and the accommodation state of the second frame member 40 are switched, the second frame member 40 is pulled up so as to resist the urging force of the coil spring 47 to lock the locking projection 44 with the notch 45. Then, the second frame member 40 is rotated as it is. At this time, the locking projection 44 moves along the upper edge 46. Then, when the locking projection 44 reaches the position of the other notch 45, release the hand and lock the locking projection 44 to the notch 45 by the urging force of the coil spring 47.
In this case, the degree of locking by the notch 45 held in the used state may be different from the degree of locking by the notch 45 held in the accommodated state. For example, in the use state, it is preferable that the second frame member 40 be firmly held because the body of the worker may touch the body. Therefore, the notch 45 held in the use state is made deep, and for example, more than half of the disk-shaped locking projection 44 is positioned and locked in the notch 45. On the other hand, in the housed state, it is preferable that the second frame member 40 can be switched to the use state with a light force. Therefore, the notch 45 held in the housed state is made shallow, and for example, about half of the rod-shaped locking projection 44 is positioned and locked in the notch 45.

  Next, a series of operations until the stepped workbench 1 in the folded state is brought into the use state will be described. As shown in FIG. 4, in a state where the stepladder work table 1 is folded, the first main leg 10a and the second main leg 10b are folded so as to be parallel. The top plate 20 is folded along the first main leg 10a. Further, the first frame member 30 and the second frame member 40 are in a housed state via the brackets 31 and 41, respectively.

First, the operator puts the first main leg 10a and the second main leg 10b in an open state so as to be inclined downward and outward through the rotating part 11. At this time, the top plate 20 is in a state of being bridged between the first main leg 10a and the second main leg 10b by the stay 21.
Next, the worker ascends to the top plate 20 using the step 13 from the first main leg 10a side, and enters the storage state while standing on the step 13 in a stage before rising to the top plate 20. A certain first frame member 30 is rotated forward to be in a use state.
In addition, while standing on the step 13 at the stage before climbing to the top 20, the worker rotates the second frame member 40 in the housed state backward to use the second frame member 40.
Thereafter, the worker rises on the top 20. At this time, it is necessary for the operator to pass through the inside of the second frame member 40, but the distal end 40 a of the second frame member 40 is located above the top plate 20 at a distance of about 1000 mm or more and 1500 mm or less. There is no necessity, and the user can smoothly ascend the top plate 20.

  Here, the operation of rotating the second frame member 40 may be performed as follows. That is, before rotating the second frame member 40 in the housed state, the worker rises on the top plate 20. At this time, the body is inserted between the distal end 30a of the first frame member 30 and the distal end 40a of the second frame member 40 in the housed state. Then, when the worker standing on the top plate 20 pushes the front end 40a of the second frame member 40 with his / her back, the second frame member 40 in the housed state is rotated rearward to be in the use state. Can be.

The stepladder-type work table 1 as described above aims to increase the work efficiency by surrounding the work space S above the top plate 20.
Moreover, the front end 40a of the second frame member 40 is located at the rear (rear side) of the worker standing on the top plate 20, and is disposed at the height of the worker's back. In many cases, the operator has a tool bag (waist bag) hanging on his / her waist. However, it is possible to prevent the tool bag from interfering with the second frame member 40.
Further, since the tip end 40a of the second frame member 40 is located on the ascending / descending side of the worker and is located above the top plate 20 at a distance of about 1000 mm or more and 1500 mm or less, it does not hinder the elevating to the top plate 20. .

As described above, the present invention has been described with the embodiment. However, the above embodiment is merely an example of the embodiment in carrying out the present invention, and the technical scope of the present invention is interpreted in a limited manner. It must not be. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features.
For example, although an example has been described in which the second frame member 40 is a pipe material made of an aluminum alloy, the materials and structures of the first frame member 30 and the second frame member 40 are not limited.

  1: Stepladder work table, 10a, 10b: main leg, 11: rotating part, 12: support, 13: step, 20: top plate, 21: stay, 30: first frame member, 31: bracket , 40: second frame member, 41: bracket

Claims (4)

A pair of main legs, the upper portions of which are rotatably mounted on the shaft, and which are inclined outward toward the lower side,
A top plate erected between the pair of main legs,
A frame member surrounding a work space above the top plate,
The pair of main landing gears includes a first main landing gear used for lifting and lowering, and a second main landing gear,
The frame member is configured to include a first frame member and a second frame member,
The first frame member has a substantially U-shape, and both end portions on the open side are supported by the first main leg or the second main leg, and face the second main leg side. Is arranged at a predetermined height on the side of the second main leg,
The second frame member has a substantially U-shape, and both ends on the open side are supported by the first main leg or the second main leg, and face the first main leg. A stepladder-type workbench , which is disposed so as to be higher than the first frame member and is positioned higher than the predetermined height on the first main leg side . Said second frame member, stepladder workbench according to claim 1, characterized in that located below the height 1500mm or 1000mm from the top plate. The first main leg is long , the second main leg is short , and the upper end of the second main leg is rotatably mounted below the upper end of the first main leg. ,
The top plate is erected at an intermediate position in the height direction of the pair of main legs, and has one end protruding outward from the second main leg,
The first frame member is attached to an upper end of the first main leg via a bracket,
3. The stepladder type work table according to claim 1, wherein the second frame member is attached to an upper end of the first main leg via a bracket . 4. Stepladder workbench according to any one of claims 1 to 3 wherein the second frame member is characterized in that it is rotatably supported.

Images