JP7038381B2 - Workbench - Google Patents

Description

The present invention relates to a workbench used for getting on and off workers and placing objects at a construction site, and more particularly to a workbench in which the height of the pedestal portion can be switched.

The inventions described in the following non-patent documents are disclosed as temporary workbenches and stepping stones used at construction sites and the like.
In the assembly-type stepping stone shown in Non-Patent Document 1, one side plate pair folded between the top plate and the bottom plate is unfolded by the operation of lifting the top plate, and the other side plate pair is further raised to form both side plate pairs. By fixing it, the height of the top plate can be raised.

http://gop.co.jp/products/img/ctlg_orion500.pdf

The assembly-type stepping stone according to Non-Patent Document 1 has the following problems.
(1) Since it is made of resin, it has poor weather resistance.
(2) Since it is mainly integrally molded with resin, it is difficult to partially replace it when a part of the component is damaged, and even a slight damage is treated as a total loss.
(3) Since the standing operation of the other side plate pair must be performed by the assembler, it is indispensable to switch between the top plate and the other side plate pair in one assembly operation.

Therefore, an object of the present invention is to provide a highly convenient workbench by solving the above problems.

The present invention, which has been made to solve the above problems, is a work table whose height can be switched, and includes at least an upper member and a lower member which are separate and independent from each other and have a substantially regular square shape when viewed in a plan view. , The upper member is accommodated in the lower member, and the upper member is rotated by about 90 degrees in a plan view and placed on the lower member. The upper member has at least a pedestal portion and a leg portion extending downward from the pedestal portion, and the lower member forms a corner portion of the lower member. It has at least a support portion which is provided inside the pillar portion of the lower member in a plan view and forms a gap between the pillar portion, and the leg portion constitutes the width and depth of the leg portion. When the two sides are viewed in a plan view, the length of one side is equal to or less than the width of the gap, and the length of the other side is larger than the width of the gap. The leg portion is housed in the gap, and in the deployed posture, the support portion supports the leg portion so that the pedestal portion is raised.
Further, in the present invention, the lower member may be provided with a fixing portion capable of fixing the position of the leg portion.
Further, in the present invention, the upper member is provided with a connecting hole penetrating up and down, and the lower member is provided with a lock pin having a rotation axis in the vertical direction. A lock pin provided on the upper member of the upper workbench may be inserted into a connecting hole provided on the upper member of the workbench, and the two may be connected by rotating the lock pin.
Further, in the present invention, at least two of the four side portions constituting the side surface of the lower member are provided with a Dharma hole in one side portion and an engaging pin is provided in the other side portion. When two workbenches are arranged in parallel, the two workbenches are engaged by inserting the engagement pin provided in the other workbench into the Dharma hole provided in one workbench. The pedestals may be configured to be connectable.
Further, in the present invention, a non-slip portion having a height adjusting mechanism may be provided on the bottom surface of the lower member.
Further, in the present invention, a step may be provided on the outer edge of the pedestal portion.
Further, in the present invention, the upper member and the lower member may be connected by a wire.

According to the present invention, the effects described below are obtained.
(1) By making each part of the upper member and the lower member constituting the workbench made of metal, it is possible to provide a workbench having excellent weather resistance.
(2) By constructing the workbench by detachably connecting a plurality of metal parts, it is possible to replace the damaged parts individually, and the ratio of total loss treatment is reduced.
(3) Since the height of the workbench can be changed by simply pulling out the upper member housed in the lower member, rotating it approximately 90 degrees and reinserting it into the lower member, the operator can change the handle. Is unnecessary, and work efficiency is high.
(4) By providing the lower member with a fixing portion for fixing the position of the leg portion, the lower member and the upper member can be firmly fixed in either the accommodating posture or the unfolding posture.
(5) By connecting the upper member and the lower member with a wire, it is possible to prevent a large drop of each member even if the transportation work or the like is performed while the fixing portion has forgotten to fix the member.
(6) When two workbenches are stacked and arranged, the two workbenches can be easily integrated by connecting the two workbenches via a connecting hole and a lock pin.
(7) When arranging two workbenches in parallel, by connecting the two workbenches via a Dharma hole and an engaging pin, the workbenches can be easily integrated.
(8) By providing a step that raises the height of the outer edge of the pedestal, the outer edge of the pedestal can be recognized by the feeling of the foot of the worker on the pedestal, and the worker from the pedestal can recognize the outer edge of the pedestal. The fall can be suppressed.

Schematic perspective view of the workbench according to the present invention. Schematic perspective view showing the shape of the leg. Schematic perspective view around the non-slip part. The schematic diagram which shows the connection mechanism for parallel arrangement. The schematic diagram which shows the connection mechanism for a laminated arrangement. The schematic plan view which shows the arrangement form of the support part. The schematic which shows the relationship between a gap and a leg. Schematic plan view around the fixed part. Schematic front view showing the posture transition of the workbench. The schematic plan view which shows the deformation example of a support part.

Hereinafter, examples of the present invention will be described with reference to the drawings.

<1> Overall configuration (Fig. 1)
The workbench A according to the present invention includes at least an upper member B and a lower member C that can be detachably attached to each other separately from each other.
Both the upper member B and the lower member C have a substantially regular rectangular shape in a plan view.
Therefore, even if the workbench A is rotated by 90 degrees with the vertical direction as the rotation axis, the planar shape of the workbench A does not change substantially.
The workbench A according to the present invention can arbitrarily set two types of postures (accommodation posture or deployment posture) in which the upper member B is attached to the lower member C in different ways, thereby switching the height of the workbench A. It is something that can be done.

<1.1> Material of each member It is desirable that a part or all of each component constituting the upper member B and the lower member C is made of metal.
This is to ensure the weather resistance of the workbench A.

<1.2> Assembling Mode of Each Member It is preferable that each component constituting the upper member B and the lower member C has a detachable assembly structure.
This is because the workbench A can be treated as a total loss by making it possible to replace the damaged parts individually.
Hereinafter, details of each member will be described.

<2> Upper member (Fig. 1)
The upper member B is a member for forming a stepping stone on which a worker gets on and off and a mounting surface on which an object is placed.
The upper member B has at least a pedestal portion 10 and legs 20 extending downward from the four corners of the pedestal portion 10.
In addition, the upper member B may be formed with ribs or the like for ensuring the desired rigidity or strength in each member, or a connecting material or the like may be appropriately added as a separate member.

<2.1> Pedestal (Fig. 1)
The pedestal portion 10 is a portion for getting on and off the worker and placing an object.
The pedestal portion 10 can be composed of a flat plate member having a substantially regular square shape in a plan view, a box-shaped member having a side wall 11 extending below the flat plate member, and the like.
The upper surface of the pedestal portion 10 may be provided with a pattern such as a protrusion or a groove for preventing slipping.
In this embodiment, the pedestal portion 10 is formed by welding a regular square flat plate 12 inside the side walls 11 having four sides of equal length.

<2.1.1> Outer edge shape of the pedestal portion 10 (FIG. 1)
In this embodiment, the upper surface of the pedestal portion 10 is provided with a step 13 so that the outer edge side is higher.
This is to make the outer edge of the pedestal portion 10 recognized by the feeling of the worker's foot on the pedestal portion 10 so that an accident such as a worker falling from the pedestal portion 10 does not occur.

<2.1.2> Connecting holes for stacking (Fig. 1)
The pedestal portion 10 may be appropriately provided with a connecting hole 14 that penetrates vertically.
The connecting hole 14 is an element for inserting a lock pin 55 provided in the lower member C constituting the upper work when the two workbenches A (A1 and A2) are stacked and arranged one above the other, and is detailed. The explanation will be described later.

<2.2> Legs (Figs. 1 and 2)
The leg portion 20 extends downward from the pedestal portion 10 and is a portion used to extend the height of the pedestal portion 10 when the workbench A is in the deployed posture.
In this embodiment, the legs 20 are extended downward from all four corners of the pedestal portion 10 having a substantially regular square shape in a plan view.
The length of the leg portion 20 can be appropriately designed according to the height of the workbench A required in the deployed posture.

<2.2.1> Formation of insertion holes (Fig. 2)
The leg portion 20 can be formed with an insertion hole corresponding to the fixing portion 70 described later used for fixing the upper member B and the lower member C.
In this embodiment, in the accommodating posture in which the leg portion 20 is accommodated in the lower member C, the fixed portion 70 and the fixed portion 70 are in the position close to the fixed portion 70 and in the deployed posture in the state where the leg portion 20 is supported by the lower member C. Insertion holes (upper insertion hole 21, lower insertion hole 22) are provided at two locations, which are close to each other.

<2.2.2> Leg shape (width length, depth length) (Fig. 2)
The two sides (width length, depth length) constituting the outer corner portion of the leg portion 20 have different lengths when the leg portion 20 is viewed in a plan view.
In this embodiment, as shown in FIG. 2, the shape of the projection portion 23 obtained by viewing the leg portion 20 in a plan view is a rectangular shape having a width length B and a depth length D. Further, in the accommodation posture, the short side side is defined as the width side and the long side side is defined as the depth side among the two sides constituting the outer corner portion of the leg portion 20.
This is because by exhibiting the above shape, the accommodation posture and the deployment posture can be switched by changing the mounting direction of the upper member B with the lower member C described later. Details will be described in the column of the support portion 60 of <3.3.1> described later.

<2.2.3> Tip aspect of the leg (Fig. 2)
The tip aspect of the leg portion 20 is not particularly limited, but a tapered shape that tapers toward the tip may be provided.
In this embodiment, as shown in FIG. 2, while providing an inclined surface 24 that tapers from the middle of the inner surface of the leg portion 20 toward the tip, the width length of the gap from the lower end of the inclined surface 24 and the like are substantially the same. A vertical plane is provided to maintain the length.

<2.2.4> Formation of notch (Fig. 2)
Further, in this embodiment, a notch 25 is provided on the back surface side of the tip of the leg portion 20.
This prevents the leg portion 20 from interfering with the joint portion (FIG. 3) used for connecting the pillar portion 30 and the bottom plate 31, which will be described later, in the accommodating posture in which the leg portion 20 is accommodated in the lower member C. Because.

<3> Lower member (Figs. 1, Fig. 3 to Fig. 5)
The lower member C is a member for accommodating or supporting the leg portion 20 of the upper member B so that the position of the pedestal portion 10, that is, the height of the workbench A can be switched.
In this embodiment, the lower member C is provided with a pillar portion 30 forming four corners, a non-slip portion 40 provided below the pillar portion 30, a side portion 50 erected between the pillar portions 30, and the like. It is configured to have a support portion 60 arranged inward from a set of side portions 50 facing each other among the side portions 50.
In addition, the lower member C may be formed with ribs or the like for ensuring the desired rigidity or strength in each member, or a connecting material or the like may be appropriately added as a separate member.

<3.1> Pillar part (Figs. 1 and 3)
The pillar portion 30 is a member that forms a corner portion of the lower member C.
In this embodiment, the pillar portion 30 is composed of a substantially L-shaped member arranged at each of the four corner portions of the lower member C.
Further, in this embodiment, as shown in FIG. 3, a bottom plate 31 is separately fixed to the lower end of each pillar portion 30 by using a connecting portion 32.
The bottom plate 31 functions as the bottom surface of the workbench A when the non-slip portion 40 described later is not provided, functions as an arrangement surface of the non-slip portion 40 described later, or the leg portion 20 in the accommodation posture. It can function as a support surface.

<3.2> Non-slip part (Fig. 3)
The non-slip portion 40 is a member for preventing the installed workbench A from slipping.
In this embodiment, as shown in FIG. 3, a non-slip portion 40 having a height adjusting mechanism with the lower member C is provided at the bottom of the lower member C, and more specifically, a rubber base 41 and a rubber. The non-slip portion 40 is formed by the screw shaft 42 protruding from the top of the base 41.
A screw hole is provided in the bottom plate 31 attached below the pillar portion 30, and the screw shaft 42 is screwed into the screw hole from below to increase the height between the rubber base 41 and the bottom plate 31. An adjustable non-slip portion 40 is formed.
Further, although not shown in FIG. 3, in order to prevent the non-slip portion 40 screwed to the bottom plate 31 from coming off, the released end of the screw shaft 42 after screwing may be processed so as not to be screwed.

<3.3> Side part (Fig. 1, Fig. 4, Fig. 5)
The side portion 50 is a portion constituting the side peripheral portion of the lower member C.
The shape and structure of the side portion 50 can be appropriately changed within a range that does not exceed a desired weight and a range that can secure a desired rigidity.
In this embodiment, as shown in FIG. 1, the side portion 50 is composed of an upper connecting material 51 and a lower connecting material 52 which are erected between pillars and arranged substantially in parallel with a space above and below. ing.

<3.3.1> Upper contact material / lower contact material (Fig. 1)
The upper connecting material 51 is erected from a position slightly below the head of the pillar portion 30, and in the accommodating posture, the inside of the workbench A is located between the pedestal portion 10 of the upper member B and the upper connecting material 51. We have secured a space where you can reach out.
Further, by erection of the lower connecting material 52 from a position further downward from the upper connecting material 51, it is possible to reach the inside of the lower member C from the open space between the two connecting materials. It is configured so that it can be done.
With this configuration, it is possible to facilitate the fixing work by the fixing portion 70, which will be described later, and to increase the number of handle portions when the worker carries the workbench A.

<3.3.2.> Connection mechanism for parallel arrangement (Figs. 1 and 4)
The lower member C may be provided with a mechanism that can be connected to another workbench A in the plane direction.
As the above-mentioned connecting mechanism, for example, in at least two facing side portions 50 among the four side portions 50, a Dharma hole 53 is provided in one side portion 50, and an engaging pin 54 is provided in the other side portion 50. The configuration is conceivable.
In this embodiment, as shown in FIG. 1, of the four upper connecting materials 51, two engaging pins 54 are provided on the two adjacent upper connecting materials 51, respectively, and the remaining two upper connecting materials 51 are provided with the engaging pins 54. , The Dharma hole 53 to which the engaging pin 54 can be attached is provided at two places.
Then, as shown in FIG. 4, the engaging pin 54 of the other workbench A2 is inserted into the Dharma hole 53 of one workbench A1 and slid so that the two can be connected.

<3.3.3> Connecting mechanism for laminated arrangement (Figs. 1 and 5)
The lower member C may be provided with a mechanism that can be connected to another workbench A in the vertical direction.
As the above-mentioned connecting mechanism, for example, it is conceivable that the upper member B is provided with a connecting hole 14 penetrating vertically, and the lower member C is provided with a lock pin 55 that can be inserted into the connecting hole 14 with the vertical direction as a rotation axis. Be done.
In this embodiment, as shown in FIG. 5, among the lower connecting members 52 constituting the lower member C, the upper and lower ends are folded in the same direction on both of the lower connecting members 52 arranged on the opposite side portions 50. A curved lock pin 55 is provided, and a connecting hole 14 corresponding to the lock pin 55 is provided in the pedestal portion 10 constituting the upper member B.

The lock pin 55 is urged upward by a spring provided on the outer periphery, and the lower end of the lock pin is hidden from the bottom surface of the workbench A.
First, in a state where the workbench A is stacked on the upper and lower sides, the lock pin 55 is held with the bent portion of the lower end of the lock pin 55 provided on the upper workbench A2 facing in one direction (left direction in FIG. 5). By pushing it downward, the lower end of the lock pin 55 is inserted into the connecting hole 14 provided in the pedestal portion 10 of the lower workbench A1.
After that, when the lock pin 55 is rotated by approximately 180 ° and the bent portion of the lower end of the lock pin 55 is oriented in a direction different from the one direction (for example, the right direction in FIG. 5), the lower end of the lock pin 55 is turned. The bent portion of the workbench A interferes with the pedestal portion 10 of the lower workbench A, and the lower end is urged upward by the restoring force of the spring.

Both workbenches A1 and A2 laminated by the above procedure can be fixed.
Further, by confirming the direction of the bent end on the upper side of the lock pin 55, it is possible to easily confirm the presence or absence of the lock.

<3.4> Support part (Figs. 6 and 7)
The support portion 60 is a member for supporting the leg portion 20 of the upper member B above the lower member C in the deployed posture.
In this embodiment, the support portion 60 is composed of a long member arranged so as to be erected at a position separated inward from the other side surface between the opposite side surfaces of the lower member C.

<3.4.1> Relationship between the space between the accommodation spaces and the legs (Figs. 6 and 2)
As shown in FIG. 6, the distance between the gaps formed between the pillar portion 30 and the support portion 60 is not less than the width length of the leg portion 20 shown in FIG. 2 and less than the depth length of the leg portion 20. This gap serves as an accommodation space 61 for accommodating the leg portion 20 of the upper member B in the accommodating posture.

<3.4.2.> Shape of support (Fig. 7)
A guide surface 62 corresponding to the tip shape of the leg portion 20 described above may be provided on the upper surface of the support portion 60.
In this embodiment, the guide surface 62 is provided so that the portion of the upper surface of the support portion 60 near the side portion 50 side is inclined downward.
With this guide surface 62, when the upper part of the leg 20 is pulled upward from the accommodation posture and lowered in a state of being rotated by approximately 90 °, the tip of the leg 20 is caused by the guide surface 62 even if there is some misalignment. Since it is guided to the accommodation space 61, workability is improved.
Further, since the area supporting the weight of the upper member B increases, it also contributes to the improvement of stability in the deployed posture.

<3.5> Fixed part (Fig. 8)
The fixing portion 70 is a member for fixing the leg portion 20 to the lower member C in both the accommodation posture and the unfolding posture.
In this embodiment, the fixing portion 70 is located on the inner side surface of the support portion 60, and is arranged so as to penetrate the inside of the support portion 60 and the lever 71 that can rotate with the vertical direction as the rotation axis direction. It is configured to include at least an infestation pin 72 whose tip is freely infested on the outer surface of the support portion 60 by the rotational operation of 71.
By moving the lever 71 of the fixing portion 70, the tip of the infestation pin 72 is moved to the insertion hole provided in the leg portion 20 of the upper member B (upper insertion hole 21 in the accommodation posture and lower insertion hole 22 in the deployment posture). By inserting the leg portion 20, the position of the leg portion 20 can be fixed, and as a result, the lower member C and the upper member B can be firmly integrated.

<4> Usage image (Fig. 9)
Hereinafter, a usage image of the workbench A according to the present embodiment will be described with reference to FIG. 9.

<4.1> Containment posture (Fig. 9 (a))
FIG. 9A is a schematic plan view and a schematic front view of the workbench A in the accommodation posture.
In the accommodation posture, the leg portion 20 of the upper member B is accommodated in the accommodation space 61 formed on the outside of the support portion 60.
As a mode for supporting the upper member B by the lower member C, a mode in which the lower end of the leg portion 20 is in contact with the bottom plate 31 and a mode in which the pedestal portion 10 is supported by the upper surface of the pillar portion 30 of the lower member C. Etc. can be adopted.
Further, the fixing portion 70 is in a state where the upper member B and the lower member C are fixed via the upper insertion hole 21 provided in the leg portion 20.

<4.2> Deployment posture (Fig. 9 (b))
FIG. 9B is a schematic plan view and a schematic front view of the workbench A in the deployed posture.
When the upper member B is pulled out upward from the state of the accommodating posture by the fixing portion 70 and the upper member B is rotated by approximately 90 ° in a plan view, the width length and the depth length of the leg portion 20 are exchanged in the front view. It will look good.
After that, when the upper member B is lowered to the lower member C, the leg portion 20 interferes with the support portion 60 and cannot be completely accommodated in the accommodation space 61, and the inclined surface 24 of the leg portion 20 is the support portion 60. It comes into contact with the guide surface 62 and is supported.
As a result, the pedestal portion 10 above the leg portion 20 stays at the raised position.
Finally, the fixing operation by the fixing portion 70 is performed again through the lower insertion hole 22 provided in the leg portion 20, and the upper member B and the lower member C are integrated to complete the work.

<5> Summary As described above, according to the workbench A according to the present invention, the total height of the workbench A can be changed simply by pulling out the upper member B from the lower member C, rotating the upper member B, and then reinserting the upper member B into the lower member C. be able to.
In this work of changing the total height, it is not necessary to change the hands of the worker, so that the effect of high work efficiency can be obtained.

[Deformation example of support portion (FIG. 10)]
In Example 1 described above, the support portion 60 is erected between the adjacent pillar portions 30, but the present invention is not limited to the above structure.
For example, as shown in FIG. 10, the support portion 60 is composed of an L-shaped member, and both ends of the support portion 60 are connected to the pillar portion 30 and the side portion 50 (upper connecting member 51) constituting the side surface of the lower member. Then, the accommodation space 61 having a small cross section may be formed.

[Connect by wire]
The upper member B and the lower member C described above may be separately connected by a wire (not shown). The length of the wire may be appropriately set within a range in which the posture of the upper member B can be changed.
When carrying the workbench A in the housed posture, the workbench A is raised 90 ° to form the side edge of the pedestal portion 10 constituting the upper member B and the side portion 50 constituting the lower member C. Often gripped.
At this time, even if the worker forgets to work with the fixing portion 70, if the two are connected by the above wire, it is possible to prevent a big accident such as each member slipping out and falling during transportation. be able to.

A Workbench B Upper member C Lower member 10 Lower member 11 Side wall 12 Flat plate 13 Step 14 Connecting hole 20 Leg 21 Upper insertion hole 22 Lower insertion hole 23 Projection part 24 Inclined surface 25 Notch 30 Pillar part 31 Bottom plate 40 Non-slip Part 41 Rubber base 42 Screw shaft 50 Side part 51 Upper contact material 52 Lower contact material 53 Dharma hole 54 Engagement pin 55 Lock pin 60 Support part 61 Accommodation space 62 Guide surface 70 Fixed part 71 Lever 72 Haunting pin

Claims (7)

It is a workbench whose height can be switched.
It is provided with at least an upper member and a lower member that are separated from each other and have a substantially regular square shape in a plan view.
The accommodation posture in which the upper member is accommodated in the lower member, and
The upper member pulled out from the lower member can be rotated by approximately 90 degrees in a plan view and switched to a deployed posture in which the upper member is placed on the lower member.
The upper member
It has at least a pedestal and legs that extend downward from the pedestal.
The lower member
A column portion having a substantially L-shape in a plan view forming a corner portion of the lower member,
It has at least a support portion that is provided inside the lower member in a plan view and forms a gap between the lower member and the pillar portion .
When the leg portion views the two sides constituting the width and depth of the leg portion in a plan view, the length of one side is equal to or less than the width of the gap, and the length of the other side is the above. It has a shape larger than the width of the gap and
In the accommodation posture, the legs are accommodated in the gap.
The unfolded posture is characterized in that the support portion supports the leg portion so that the pedestal portion is raised.
Workbench. The lower member is provided with a fixing portion capable of fixing the position of the leg portion.
The workbench according to claim 1. The upper member is provided with a connecting hole that penetrates up and down.
The lower member is provided with a lock pin having a rotation axis in the vertical direction.
When stacking two workbenches
A lock pin provided on the upper member of the upper workbench is inserted into a connecting hole provided on the upper member of the lower workbench, and the two can be connected by the rotational operation of the lock pin.
The workbench according to claim 1 or 2 . At least on two opposing side portions out of the four side portions constituting the side surface of the lower member.
A Dharma hole is provided on one side, and an engaging pin is provided on the other side.
When arranging two workbenches in parallel
The two workbenches are configured to be connectable by inserting and engaging the engagement pin provided in the other workbench into the Dharma hole provided in one workbench.
The workbench according to any one of claims 1 to 3 . A non-slip portion having a height adjusting mechanism is provided on the bottom surface of the lower member.
The workbench according to any one of claims 1 to 4 . A step is provided on the outer edge of the pedestal portion.
The workbench according to any one of claims 1 to 5 . The upper member and the lower member are connected by a wire.
The workbench according to any one of claims 1 to 6 .

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