JP2003262044A - Portable workbench - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a portable workbench which does not interfere with ascent from a main leg to a top board and descent from the top board to the main leg, allows a worker to recognize an end side end of the top board and an end along a longitudinal direction by a sole sense even if the worker performs work on the top board without looking at a floor surface of the top board, can prevent the worker from falling from the top board by missing his/her foot, and can be easily applied even to an existing workbench. <P>SOLUTION: In this portable workbench in which the top board 4 is laid between the paired main legs 3, a button-shaped protrusion 10, a ridge-shaped protrusive streak 11, a button-shaped cap 12 and the like are provided near an end on the side of the main leg 3 of the top board 4 and near a longitudinal end as protrusions 9 capable of being sensed by a sole. <P>COPYRIGHT: (C)2003,JPO

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 / exterior work such as ceilings and wall surfaces of buildings, and electric wiring work.

[0002]

2. Description of the Related Art As is well known in the art, such a portable workbench has a ladder-shaped main leg 30 in which a plurality of step bars 2 are mounted at appropriate intervals between a pair of column legs 1 as shown in FIG. A rectangular top plate 3 is formed between a pair of the main legs 30 in a ladder shape.
2 is rotatably attached, and the top plate 32 and the main leg 30 are further attached.
A bendable stay 31 is interposed between and.

During use, the main leg 30 is lifted and the work is performed while standing on the top plate 32 or walking. In this case, in order to prevent the work from slipping on the top plate 32 or the tools placed on the top plate 32 from sliding and falling down, the top plate 32 is appropriately covered over the entire surface. A large number of anti-slip holes 8 are provided at intervals.

[0004]

The top plate 32 has a relatively long length of, for example, 1 m50 cm in the longitudinal direction, and when working on it, the feet are apt to be neglected when the work is distracted. As a result, there is a risk of stepping off the top plate 32 and falling. In order to prevent this danger, it is conceivable to take measures such as attaching a handrail separately in the longitudinal direction of the top plate 32.

However, the handrail is not always attached also in the longitudinal direction, and particularly, the upper side of the top plate 32 (short side direction) serves as an ascending / descending surface with respect to the main landing gear 30. Since the provision of the handrail hinders the work, it is difficult to perform the work, and hitherto, an effective hand has not been considered as a fall prevention means due to the stepping off.

Although the non-slip hole 8 has the effect of preventing slippage, it has a small diameter of about 14 mm, so a hole of this size will not be struck by the sole of the foot even if the hole is stepped on. It is difficult to detect its presence, and this hole cannot be used as a fall prevention notification means.

The object of the present invention is to eliminate the inconveniences of the above-mentioned conventional example, to prevent the elevator from being hindered from falling, to prevent a fall due to stepping off the top plate, and to easily implement it on an existing workbench. To provide a workbench.

[0008]

In order to achieve the above object, the present invention is, firstly, in a portable workbench in which a top plate is bridged between a pair of main legs, an end of the top plate on the main leg side. The gist of the present invention is to provide a protrusion that can be sensed by the sole of the foot in the vicinity of the portion and in the vicinity of the end in the length direction.

Secondly, in a portable workbench in which a top plate is bridged between a pair of main legs, a protrusion that can be sensed by the sole of the foot is provided near the end of the top plate on the main leg side. To do.

Thirdly, the gist is that the projection is a projection integrally formed on the top plate.

Fourthly, the gist is that the projection is formed by a cap having a button-shaped projection that is removably inserted into a slip preventing hole formed in a top plate.

Fifth, the gist is that the projection is a ridge-shaped projection.

According to the first aspect of the present invention, when working on the top plate and approaching the end part on the main leg side of the top plate or the end part in the longitudinal direction, the protrusion formed here You can know your existence with the feeling of your soles. Therefore, even if you do not look directly at your feet, you will know that you have come to the end of the tabletop as if you were feeling the bottom of your feet, and stop walking and pay attention to your feet. Can be prevented.

According to the second aspect of the present invention, when working on the top plate and approaching the end of the top plate on the main leg side, the presence of the projection formed here is sensed as if it were the sole of the foot. I can know. Therefore, even if you do not look directly at your feet, you will feel that you have come to the end of the top plate on the wife side, and you will stop walking and pay attention to your feet. It is possible to prevent stepping off.

According to the third aspect of the present invention, the protrusion is
Since the top plate can be integrally formed in advance by plastic working or the like during manufacturing, it is easy to form.

According to the present invention of claim 4, the protrusion is
By using a cap with button-shaped protrusions that can be detachably inserted into the anti-slip holes formed on the top plate, you can prevent the foot from slipping off by simply inserting the cap into the anti-slip hole even on the existing top plate. The effect of can be expected. If the protrusion is damaged, it can be easily replaced with a new one. Further, the number of protrusions formed can be set arbitrarily.

According to the present invention as set forth in claim 5, since the protrusion is formed in a ridge shape, if it stands upright on the end of the top plate, the protrusion is always in contact with and the existence thereof can be recognized without fail, and the prevention of stepping off is ensured. It can be something.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an overall perspective view showing an embodiment of a portable workbench of the present invention, and FIG. 2 is a vertical sectional front view of a part of a top plate which is a main part of the same. It is composed of a ladder-shaped main leg 3 and a top plate 4 bridged between the upper parts of the pair of main legs 3, and the top plate 4 has a large number of non-slip holes 8 at appropriate intervals over the entire surface in a conventional manner. It has been drilled.

The main leg 3 includes a plurality of (4 in the illustrated example) stepped rails 2 between the pair of support legs 1 and 1 at an appropriate interval (in the illustrated example, about 300 mm in the height direction). Bridge, support leg 1
A rod-shaped auxiliary handrail 5 is provided so as to be rotatable from the upper end in a vertical direction, and both the column leg 1 and the auxiliary handrail 5 are made of, for example, an aluminum alloy, and are formed in a U-shaped cross section. Then, the length of the step rail 2 is made shorter as it goes to the upper stage, and is formed so that the distance between the column legs 1, 1 becomes narrower as it goes upward.

In the present embodiment, the auxiliary handrails 5 have end portions on both sides of the top plate 4 so as not to interfere with the ascent and descent to the top plate 4 because the step rails 2 serve as an elevating part to the top plate 4. It was provided only on one side of the section.

In the figure, 6 is an extension leg attached to the lower part of the column leg 1 for height adjustment so that it can extend and contract, and 7 is an opposing extension leg 6
Of these, a caster attached to the lower part of the extension leg 6 on one side is shown.

According to the present invention, in the portable workbench having such a structure, the top plate 4 is located near the end portion on the rear side, for example, 85 m from the end portion.
Protrusions 9 that can be sensed by the sole of the foot are provided within a width range of about m and near the ends along the length direction. In the first embodiment, as shown in FIG. 2, the protrusion 9 is a button-shaped protrusion that is integrally bulged by plastic working during manufacturing of the top plate 4, and the button-shaped protrusion 10 is The upper surface is a plane 10
The height formed in a is about 3 to 10 mm, the diameter of the flat surface 10a is about 10 to 30 mm, and the whole is trapezoidal. The planar shape may be circular or rectangular.

The operation will now be described. An operator working on the top plate 4 walks on the top plate 4 following the progress of the work. It is often the case that you cannot pay attention to your feet. In this case, when the end portion of the top plate 4 on the main leg 3 side or the end portion along the length direction is approached, the protrusion 9 formed here is formed.
To know the existence of "" with the feeling of the soles. As described above, the protrusion 9 is formed on the button-shaped protrusion 10 having a trapezoidal shape with a height of about 3 to 10 mm formed on the flat surface 10a and a diameter of the flat surface 10a of about 10 to 30 mm. , You can fully recognize its existence on the sole of your foot even with your shoes on.

Therefore, even if the user does not directly look at his / her feet, he / she knows that he / she has reached the end of the top plate 4 as if he / she is feeling the sole of the foot, and stops walking and pays attention to his / her feet. It is possible to prevent the foot from being stepped off.

FIG. 3 shows a second embodiment of the projection 9, which is near the end of the top plate 4 on the end side, for example, within a width of about 85 mm from the end and near the end along the length direction. As the projections 9 that can be sensed by the soles of the feet, a ridge-shaped ridge 11 extending along the lateral direction of the top plate 4 is formed by being integrally bulged by plastic working or the like when the top plate 4 is manufactured. This ridge-shaped ridge 11 also has a height of 3
The upper surface is formed as a flat surface 11a with a width of about 10 mm, and the width of the flat surface 11a is about 10 to 30 mm.

Also in the case of the second embodiment, as in the case of the first embodiment, when the work side end of the top plate 4 or the end portion along the length direction is approached during work, the sole of the foot is touched. Ridge-shaped ridge 11
Since it is possible to recognize the existence of, it is possible to prevent the stepping off. Since the projection 9 is a ridge-shaped ridge 11, a projection can be formed continuously over substantially the entire length of the end, so that when the end of the top plate 4 is reached, the projection 9 is always in contact with the projection 9. Since it will always be recognized, it is possible to reliably prevent the vehicle from being stepped off.

FIGS. 4 and 5 show a third embodiment of the projection 9. In the first and second embodiments, the projection 9 is formed integrally with the top plate 4, but in the third embodiment, the projection 9 is formed. It is a separate member from the top plate 4, and is composed of a cap 12 which is detachably inserted into a slip-proof hole 8 formed in the top plate 4.

The cap 12 is made of nylon resin having excellent corrosion resistance, strength, and formability, and the head has a diameter of 1 mm.
A button-shaped projection 12a having a height of about 7 mm and a height of about 5 mm is formed, and a lower portion is formed on a leg portion 12b having a front arrow shape. The upper surface of the button-shaped projection 12a is formed on a flat portion.
The peripheral portion is formed in an arc shape so that a thickness of about 5 mm can be secured over each portion as much as possible.

In the illustrated example, the leg portions 12b are symmetrically erected from the lower portion of the central shaft leg 14 so that the upper portions thereof are separated from each other. It is formed by making the locking step portion 13 of No. 3 thick. further,
The upper portion of the shaft leg 14 is formed in the large diameter portion 14a to ensure the strength.

The usage will be described. The cap 12
If the leg portion 12b of the above is inserted into the anti-slip hole 8 formed in the top plate 4 from above, the upper portion of the leg portion 12b is inserted into the anti-slip hole 8 while elastically shrinking toward the shaft leg 14 side. It projects on the back surface of the top plate 4. In this protruding state, the leg 12
The upper part of b is expanded again due to elasticity and is locked to the back surface of the top plate 4 at a position around the anti-slip hole 8. In this state, the button-shaped projection 12a, which is the head, projects from the top surface of the top plate 4.

When the cap 12 is inserted into the anti-slip hole 8, the upper portion of the leg portion 12b is elastically recessed toward the axle leg 14 side as described above, so that the axle leg 14 which is the lower portion of the leg portion 12b. The coupled portion with and is bent, and this portion is likely to become a fragile portion. However, since the upper portion of the shaft leg 14 is formed as the large diameter portion 14a, the upper portion of the leg portion 12b is the large diameter portion 14a.
Since the leg portion 12b is prevented from further bending by contacting with, it is possible to prevent the coupling portion with the shaft leg 14 which is the lower portion of the leg portion 12b from being weakened by the bending.

Further, since the non-slip holes 8 are formed over the entire surface of the top plate 4, the caps 12 can be arbitrarily inserted on site at the required number and only in the required places. In the example of FIG. 1, a total of seven caps 12 are provided at each end on the end side.
4 and 3 were arranged in 2 rows, and an appropriate number was arranged in 2 rows along the length direction.

When changing the place of use, the top plate 4
The cap 12 can be easily pulled out from the anti-slip hole 8 by narrowing the leg portion 12b toward the shaft leg 14 on the back surface of the cap 12.

The cap 12 attached to the top plate 4 in this manner projects onto the top plate 4 near the end of the top plate 4 near its end on the side and along its length in the vicinity of the end. Top plate 4
Even if you do the work without looking at the floor surface, if you approach the end of the top plate 4 and step on the button-shaped projection 12a of the cap 12 with your sole, It is possible to recognize that there is something, and attention is called to prevent the user from stepping off the top plate 4.

At this time, the button-shaped projection 1 of the cap 12
Since 2a has a size and a thickness that can sufficiently transmit the fact that it projects as described above to the sole of the foot, its presence can be reliably transmitted to the sole of the foot.

The third embodiment can be applied to the existing top plate 4 since it is only necessary to insert the cap 12 into the anti-slip hole 8.

Further, the place where the projection 9 is provided is not limited to the vicinity of the end portion of the top plate 4 and the end portion along the length direction as described above, and a handrail is provided in the length direction. Since it may be provided, it may be provided only in the vicinity of the end portion on the end side as shown in FIG. In this case, if the projection 9 is formed by the cap 12, the projection 9 can be attached at an arbitrary position as needed, so that it is possible to flexibly cope with it on site.

[0038]

As described above, in the portable workbench of the present invention, since only the projecting portion is provided on the top plate, there is no hindrance to lifting and lowering and the length from the wife side of the top plate is small. In this way, it can be prevented from falling in the direction due to stepping off from the end, and it can be easily implemented on existing work benches.

[Brief description of drawings]

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

FIG. 2 is a vertical cross-sectional front view of a portion of a projecting portion, which is a main portion, showing the first embodiment of the portable workbench of the present invention.

FIG. 3 is a perspective view in which a part of a protrusion, which is a main part, showing a second embodiment of the portable workbench of the present invention is partially cut away.

FIG. 4 is a front view of a cap which is a main part of a portable workbench according to a third embodiment of the present invention.

FIG. 5 is a side view of a cap, which is a main part, showing a third embodiment of the portable workbench of the present invention.

FIG. 6 is an overall perspective view showing another arrangement example of the protrusions of the portable workbench of the present invention.

FIG. 7 is a perspective view of a conventional portable workbench.

[Explanation of symbols]

1 ... Prop leg 2 ... Step rail 3 ... Main landing gear 4 ... Top plate 5 ... Auxiliary handrail 6 ... Extension leg 7 ... Caster 8 ... Anti-slip hole 9 ... Projection 10 ... Button-shaped projection 10a ... Plane 11 ... Ridge-shaped ridge 11a ... plane 12 ... cap 12a ... Button-shaped projection 12b ... Leg 13 ... Locking step portion 14 ... Shaft leg 14a ... Large diameter part 30 ... Main landing gear 31 ... Stay 32 ... Top plate

Claims (5)

[Claims] 1. A portable workbench in which a top plate is bridged between a pair of main legs, and a protrusion that can be sensed by the sole is provided near the end of the top plate on the main leg side and near the end in the length direction. A portable workbench characterized by being provided 2. A portable workbench having a top plate bridged between a pair of main legs, wherein a protrusion that can be sensed by the sole of the foot is provided near an end of the top plate on the main leg side. Portable workbench 3. The portable workbench according to claim 1, wherein the protrusion is a protrusion integrally formed on the top plate. 4. The portable workbench according to claim 1 or 2, wherein the projection is formed by a cap having a button-shaped projection that is removably inserted into an anti-slip hole formed in the top plate. . 5. The portable workbench according to claim 1, wherein the protrusion is a ridge-shaped ridge.