JP2014088762A - Stepladder-type workbench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stepladder-type workbench improving work efficiency by enclosing a work space and capable of making movement between a top board and main legs easy.SOLUTION: The stepladder-type workbench includes: a pair of main legs 10 whose upper sides are turnably journaled via a rotary part 11 and which are inclined downward and outward; a top board 20 for a work floor arranged between the pair of main legs 10; a frame member 30 arranged above the top board 20 for the work floor; and a closing member 40 which encloses a work space S formed above the top board 20 for the work floor together with the frame member 30. A part of the work space S is opened or closed by opening/closing of the closing member 40.

Description

  The present invention relates to a stepladder-type work table. For example, it is suitable for use in high places such as construction work sites, interior / exterior work such as ceilings and wall surfaces of buildings, and electrical wiring work.

  Conventionally, a stepladder has been used for high-altitude work. In the stepladder, the upper ends of a pair of ladder-like main legs each having a plurality of step bars attached at appropriate intervals are pivotally attached to each other, and a top plate is provided at the uppermost portion of the attachment part. The stepladder is configured so that the pair of main legs can be folded flat by rotating the pivoting portion.

  Patent Document 1 discloses a portable work table in which a top plate is installed between a pair of ladder-shaped main legs whose upper part is pivotally mounted and tilted outward. In this portable work table, a handrail that protrudes in the same direction as the top plate is attached above the top plate in order to ensure the safety of the operator.

JP 2010-126968 A

  However, the portable workbench disclosed in Patent Document 1 has a handrail protruding in the same direction as the top plate protruding direction, but no handrail is attached to the opposite side. Therefore, when the worker performs work on the side opposite to the protruding direction of the top plate, the work must be performed while visually checking the end of the top plate, and the efficiency of the work is reduced. is there.

  On the other hand, by attaching a similar handrail to the side opposite to the protruding direction of the top plate, the operator can work without confirming the end of the top plate, and the work efficiency can be improved. However, in this case, when an operator moves up and down the portable work table, he / she has to get over the handrail or pass through the handrail. That is, the movement between the top plate and the main leg cannot be freely performed, and the work efficiency is reduced.

  The present invention has been made in view of the above-described problems, and by making the work space more efficient by surrounding the work space, the movement between the top plate and the main leg can be easily performed. An object of the present invention is to provide a stepladder-type worktable.

  The stepladder type work table according to the present invention includes a pair of main legs that are pivotally supported on the upper side via a rotation part and inclined outward toward the lower side, and the pair of main legs. A work floor top plate, a frame member disposed above the work floor top plate, and a closing member surrounding the work space formed above the work floor top plate together with the frame member; And a part of the working space is opened or closed by opening and closing the closing member.

  According to the stepladder type work table of the present invention, work efficiency can be improved by surrounding the work space, and movement between the top plate and the main leg can be easily performed.

It is a perspective view of stepladder type work table 1 of a 1st embodiment. It is a front view of stepladder type work table 1 of a 1st embodiment. It is a side view of stepladder type work table 1 of a 1st embodiment. It is a rear view of the stepladder type work table 1 of the first embodiment. It is a side view of the state which folded the stepladder type work table 1 of 1st Embodiment. It is a perspective view which shows the state which opened the closure member 40 of 1st Embodiment. It is a perspective view which shows the state which closed the closure member 40 of 1st Embodiment. It is a figure which shows the state before locking with the locking part 50 of 1st Embodiment. It is a figure which shows the state locked by the locking part 50 of 1st Embodiment. It is a figure which shows the closure member 60 of 2nd Embodiment. It is a figure which shows the closure member 70 of 3rd Embodiment.

Hereinafter, the stepladder type work table according to the present embodiment will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a perspective view of a stepladder-type workbench 1. FIG. 2 is a front view of the stepladder type work table 1 as seen from the front side. FIG. 3 is a side view of the stepladder-type work table. FIG. 4 is a rear view of the stepladder type work table 1 as seen from the rear side. FIG. 5 is a side view showing a state in which the stepladder-type workbench 1 is folded. In each figure, the front side of the stepladder type work table 1 is indicated by Fr, the rear side is indicated by Rr, the right side is indicated by R, and the left side is indicated by L.

The stepladder type work table 1 includes a pair of main legs 10, a work floor top plate 20, a frame member 30, and a closing member 40.
The pair of main legs 10 function as so-called stepladders, the upper side of which is pivotally supported via the rotation unit 11 and is inclined outward toward the lower side. The pair of main legs 10 according to the present embodiment includes a long first main leg 10a and a short second main leg 10b.
The first main leg 10a and the second main leg 10b are each made of, for example, an aluminum alloy, and by attaching the crosspieces 13 at appropriate intervals between a pair of support columns 12 formed in a substantially U-shaped cross section, It is formed in a ladder shape. In the stepladder-type workbench 1, since the operator ascends and descends from the first main leg 10a side, the first main leg 10a is narrower than the second main leg 10b, and the number of step bars 13 is also smaller. It has a lot (see FIGS. 1 to 4). The first main leg 10a and the second main leg 10b are pivotally 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. Accordingly, the first main leg 10 a extends upward from the rotating portion 11. When the stepladder-type workbench 1 is not used, the first main leg 10a and the second main leg 10b are folded so as to be parallel around the rotating part 11 (see FIG. 5).

The work floor top plate 20 is made of, for example, an aluminum alloy and has a substantially flat plate shape. The work floor top plate 20 is disposed below the rotating portion 11 and between the first main leg 10a and the second main leg 10b, and functions as a work floor for the operator. Therefore, the upper side of the work floor top plate 20 is formed as a work space S for the worker. The work floor top plate 20 has one end 20a pivotally attached to the first main leg 10a and the other end 20b placed and supported on the step rail 13 of the second main leg 10b. The horizontal state is maintained. Further, the work floor top plate 20 is formed to have a length such that the other end 20b protrudes outward (rear side) from the second main leg 10b (see FIG. 3). Can be placed close to a work location such as a wall surface, and workability can be improved.
A stay 21 is disposed below the work floor top plate 20. One end of the stay 21 is pivotally attached to the lower side of the work floor top plate 20, and the other end is pivotally attached to a step rail 13 attached to the second main leg 10b. Therefore, the stay 21 has a function of restricting the rotation of the work floor top plate 20 when the pair of main legs 10 are rotated via the rotation unit 11. When the stepladder-type workbench 1 is not used, the first main leg 10a and the second main leg 10b are linked with the movement of the first main leg 10a and the second main leg 10b. The end and the crosspiece 13 are rotated, and the work floor top plate 20 is folded so as to be substantially parallel to the first main leg 10a (see FIG. 5).

The frame member 30 is made of, for example, an aluminum alloy, and is formed in a substantially U shape when viewed from above. The frame member 30 is disposed above the work floor top plate 20 and further above the rotating unit 11. Specifically, the frame member 30 is disposed at a height H1 of 550 mm to 900 mm from the work floor top 20 (see FIG. 2). This height is generally the height from the operator's knee to the waist.
The frame member 30 is opened only on the first main leg 10a side in the work space S and surrounds the second main leg 10b side, the right side surface, and the left side surface.
Here, both end portions of the frame member 30 are attached to the respective upper ends of the columns 12 of the first main legs 10a via frame member brackets 31. The frame member 30 has a width (distance between both ends) that is substantially the same as the distance between the columns 12 of the first main leg 10a (see FIGS. 2 and 4), and the tip 30a is the work floor top plate 20. It is set to be at the same position as the other end 20b (see FIG. 3). Further, the frame member 30 is inclined so as to be directed upward, for example, by about 7 degrees toward the tip 30a. When the stepladder-type workbench 1 is not used, the frame member 30 is rotated via the frame member bracket 31 so that the front end 30a of the frame member 30 is folded downward so as to be substantially parallel to the first main leg 10a. (See FIG. 5). The frame member bracket 31 can be selectively held in a state where the frame member 30 is inclined so as to face upward and a state where the frame member bracket 31 is folded so as to be substantially parallel to the first main leg 10a.

The closing member 40 is made of, for example, resin and is formed in a cylindrical shape having a substantially rectangular cross section. The closing member 40 is arranged on the upper side of the work floor top plate 20 and further on the upper side of the rotating portion 11. The closing member 40 is disposed below the frame member 30, that is, below the upper end of the first main leg 10a. Specifically, the closing member 40 is located at a height H2 of 550 mm to 900 mm from the work floor top plate 20 (see FIG. 2). This height is generally the height from the operator's knee to the waist. In addition, since the 1st main leg 10a inclines outside (front side) toward the lower side, it arrange | positions with the closing member 40 by arrange | positioning the closing member 40 below the upper end of the 1st main leg 10a. A wide work space S can be secured when the space S is surrounded.
The closing member 40 surrounds the work space S together with the frame member 30. Specifically, the closing member 40 surrounds the work space S by closing the first main leg 10a side of the work space S. The closing member 40 can be opened and closed and opens or closes a part of the work space S (the first main leg 10a side) by opening and closing.

  Here, a specific configuration of the closing member 40 will be described with reference to FIGS. 6 and 7. FIG. 6 is a perspective view showing a state in which the closing member 40 is opened and a part of the work space S is opened. FIG. 7 is a perspective view showing a state in which the closing member 40 is closed and a part of the work space S is closed.

  The closing member 40 of the present embodiment has a first closing member 40a and a second closing member 40b. The first closing member 40a and the second closing member 40b are attached to each of the columns 12 of the first main leg 10a via a fixing bracket 41. The fixing bracket 41 is made of metal, for example, and is coupled to the side surface of the support column 12 by screws. The fixed bracket 41 protrudes from the support 12 toward the front side, and more specifically, protrudes in a direction orthogonal to the longitudinal direction of the support 12. Here, when the first main leg 10a and the second main leg 10b are folded, the length Lo by which the fixing bracket 41 protrudes is the same as the first main leg 10a and the second main leg 10b shown in FIG. The length is preferably shorter than the thickness T3 obtained by subtracting the thickness T2 of the first main leg 10a from the thickness T1. By making the length Lo to which the fixing bracket 41 protrudes shorter than the thickness T3, interference between the fixing brackets 41 can be prevented when a plurality of stepladder-type work tables 1 are stacked.

As shown in FIG. 6 and FIG. 7, a shaft attachment portion 42 that pivotally attaches the first closing member 40 a and the second closing member 40 b is formed at the distal end portion of each fixed bracket 41. Here, the pivoting portion 42 on the first closing member 40a side will be described, but the pivoting portion 42 on the second closing member 40b side has the same configuration.
The shaft attachment portion 42 includes a front shaft support portion 42a, a rear shaft support portion 42b, a bottom portion 42c, and a side wall portion 42d. A shaft support pin 43 is inserted between the front shaft support portion 42a and the rear shaft support portion 42b, and the first closing member 40a is rotatably supported. The bottom part 42c and the side wall part 42d allow the first closing member 40a to rotate between standing and centering around the pivot pin 43. The bottom part 42c contacts the first closing member 40a when the first closing member 40a is closed and laid down, thereby holding the first closing member 40a in a closed state. On the other hand, the side wall portion 42d holds the first closing member 40a in an open state by contacting the first closing member 40a when the first closing member 40b is opened and raised. The second closing member 40b is the same as the first closing member 40a, and the description thereof is omitted here.

  In the closing member 40 configured as described above, as shown in FIG. 6, the first closing leg 40a and the second closing member 40b are rotated in the opening direction and are erected, so that the first main leg of the working space S is obtained. The 10a side can be opened. On the other hand, as shown in FIG. 7, the first main leg 10a side of the work space S can be closed by rotating the first closing member 40a and the second closing member 40b in the closing direction and causing them to fall down.

  Moreover, in the stepladder type work table 1 according to the present embodiment, the first main leg 10a side of the work space S is closed by bridging between the first closing member 40a and the second closing member 40b that are lying down. The lock part 50 which hold | maintains the state which was made is provided. Here, the lock unit 50 will be described with reference to FIGS. FIG. 8A is a view of the state before the closing member 40 is locked by the lock portion 50 as viewed from the rear side, and FIG. 8B is a cross-sectional view thereof.

  The lock part 50 is provided slidably along the longitudinal direction of the first closing member 40 a and the second closing member 40 b, and includes an operation member 51 and a sliding member 52. The lock portion 50 is positioned on the first closing member 40a before locking the first closing member 40a and the second closing member 40b, and is bridged between the first closing member 40a and the second closing member 40b after being locked. Located in the passed state.

  The operation member 51 is made of a resin colored in a color different from that of the first closing member 40a and the second closing member 40b, for example, and is formed in a cylindrical shape having a substantially rectangular cross section. The operating member 51 has a cross-sectional shape larger than the cross-sectional shapes of the first closing member 40a and the second closing member 40b in order to smoothly slide along the longitudinal direction of the first closing member 40a and the second closing member 40b. Is formed. Further, the length L1 of the operation member 51 is shorter than approximately ½ of the length L2 of the first closing member 40a.

  The sliding member 52 is made of a resin colored in a color different from that of the first closing member 40a, the second closing member 40b, and the operation member 51, for example, and has a substantially rectangular cross section. The sliding member 52 has a cross-sectional shape of the first closing member 40a and the second closing member 40b in order to smoothly slide along the longitudinal direction in the hollow of the first closing member 40a and the second closing member 40b. It is formed smaller than the shape. The length L3 of the sliding member 52 is longer than the length L1 of the operation member 51 and shorter than the length L2 of the first closing member 40a. Therefore, the sliding member 52 is accommodated in the first closing member 40a without protruding from the first closing member 40a before locking.

  In addition, inclined portions 52b are formed above and below the both end portions 52a of the sliding member 52, respectively. The inclined portion 52b functions as a guide when the sliding member 52 enters the second closing member 40b, and when the sliding member 52 is inserted into the first closing member 40a to assemble the first closing member 40a. Has the function of a guide. Further, the sliding member 52 is formed with a groove 52c along the horizontal direction from both ends 52a toward the center. A locking projection 52d is formed on the upper surface of the sliding member 52 on the second closing member 40b side. In a state where the sliding member 52 is accommodated in the first closing member 40a, the locking protrusion 52d is locked in the locking hole 40c formed on the upper surface of the first closing member 40a, so that the sliding member 52 is not in contact. Protruding from the first closing member 40a is prevented.

The operation member 51 and the sliding member 52 are coupled by a screw 53 that is tightened from the rear surface of the operation member 51. Therefore, the operation member 51 and the sliding member 52 always slide in conjunction with each other. A long hole 40d is formed on the rear surface of the first closing member 40a along the sliding direction in order to prevent interference with the screw 53 when the lock portion 50 slides. When the screw 53 comes into contact with both ends of the long hole 40d, the movement of the lock portion 50 in the sliding direction is restricted.
When the operator slides the operating member 51 toward the second closing member 40b, the locking projection 52d of the sliding member 52 and the locking hole 40c are unlocked, and the sliding member 52 is also interlocked. 2 Slide toward the closing member 40b.

FIG. 9A is a view of the state in which the closing member 40 is locked by the lock portion 50 as viewed from the rear side, and FIG. 9B is a cross-sectional view thereof. Here, the lock 53 is slid until the screw 53 comes into contact with the end of the long hole 40d. At this time, the operation member 51 is in a state of being spanned around the first closing member 40a and the second closing member 40b in the middle between the first closing member 40a and the second closing member 40b. Similarly, the sliding member 52 is in a state of being spanned between the first closing member 40a and the second closing member 40b in the middle between the first closing member 40a and the second closing member 40b.
Thus, the operation member 51 and the sliding member 52 are bridged across the first closing member 40a and the second closing member 40b, thereby maintaining the state where the first main leg 10a side of the work space S is closed. Can do. Further, the locking protrusion 52d formed on the upper surface of the sliding member 52 is locked in the locking hole 40e formed on the upper surface of the second closing member 40b, so that the sliding member 52 is inadvertently in the first position. The sliding to the closing member 40a side is prevented. At this time, since the colors of the second closing member 40b and the sliding member 52 are different, the operator can confirm whether or not the locking projection 52d is locked through the locking hole 40e.

  Further, a case is assumed in which a load is applied to the lock unit 50 and the closing member 40 from above while the closing member 40 is locked by the lock unit 50. In this case, since the groove portions 52c are formed on both sides of the sliding member 52, the first closing member 40a, the second closing member 40b, and the sliding member 52 are moved downward while the groove width of the groove portion 52c is narrowed. Bend. As described above, the first closing member 40a, the second closing member 40b, and the sliding member 52 are bent, so that the load is absorbed and the first closing member 40a, the second closing member 40b, and the sliding member 52 are damaged. Can be prevented.

  Next, a series of operations from when the stepladder-type work table 1 is folded until the worker closes a part of the work space S with the closing member 40 will be described. First, as shown in FIG. 5, in a state where the stepladder-type workbench 1 is folded, the first main leg 10a and the second main leg 10b are folded in parallel. The work floor top plate 20 is folded along the first main leg 10a. Further, the frame member 30 is folded via a frame member bracket 31. Further, the first closing member 40 a and the second closing member 40 b are in a state of being erected via the fixing bracket 41.

First, the worker opens the first main leg 10a and the second main leg 10b so as to incline outward toward the lower side via the rotating portion 11. At this time, the work floor top plate 20 is disposed between the first main leg 10 a and the second main leg 10 b by the stay 21.
Next, the worker ascends from the first main leg 10a side by using the crosspiece 13 of the first main leg 10a. The worker turns the folded frame member 30 while standing on the crosspiece 13 to position the front end 30a of the frame member 30 to the outside. By this operation, in the work space S formed above the work floor top plate 20, the second main leg 10b side, the right side surface, and the left side surface are surrounded.

  Next, the worker ascends on the work floor top plate 20 through an open part of the work space S, that is, through the first main leg 10a side. Next, the worker rotates the first closing member 40a and the second closing member 40b that are erected in the closing direction and lies down to close the first main leg 10a side of the work space S. At this time, since the operator only needs to rotate the raised first closing member 40a and the raised second closing member 40b, it is not necessary to squat down and the operability can be improved. Thus, the 1st main leg 10a side of the work space S can be obstruct | occluded by laying down the 1st obstruction | occlusion member 40a and the 2nd obstruction | occlusion member 40b. Therefore, the periphery of the working space S is surrounded by the frame member 30, the first closing member 40a, and the second closing member 40b.

  Next, the operator slides the operation member 51 of the lock portion 50 toward the second closing member 40b, and the sliding member 52 is also slid toward the second closing member 40b in conjunction with the operation member 51. By this operation, the operation member 51 is in a state of being stretched around the first closing member 40a and the second closing member 40b between the first closing member 40a and the second closing member 40b. . Similarly, the sliding member 52 is in a state of being spanned between the first closing member 40a and the second closing member 40b in the middle between the first closing member 40a and the second closing member 40b. The state where the first main leg 10a side of the work space S is closed is maintained. Note that the operator can fold the stepladder-type workbench 1 by performing an operation opposite to the operation described above.

  A part of the work space is closed by the operation as described above, and the periphery of the work space S can be surrounded. Therefore, when the worker is working in the work space S, a part of the body comes into contact with the frame member 30, the first closing member 40 a, or the second closing member 40 b, so You can recognize that you are working near the edge. As described above, the operator can recognize the end of the work floor top plate 20 so that the work can be performed safely, and it is not necessary to confirm the end of the work floor top plate 20, thereby improving work efficiency. You can plan.

According to the present embodiment, a part of the work space S can be opened or closed by opening and closing the closing member 40. When a part of the work space S is closed, the worker can work safely, and when a part of the work space S is opened, the worker can work with the work table top 20 and the first main landing gear. The movement to and from 10a can be performed freely.
Further, since the closing member 40 is located at a height of 550 mm to 900 mm from the work floor top plate 20, a part from the operator's knee to the waist contacts the closing member 40. If the lower side of the knee contacts, the movement of the feet is lost, and if the upper side of the hip contacts, the work becomes difficult. By making the height as described above, work efficiency can be improved.

(Second Embodiment)
FIG. 10 is a view showing a closing member 60 according to the second embodiment. The configuration other than the closing member 60, the fixing bracket 61, and the receiving member 62, which will be described later, is the same as that of the first embodiment, and the description thereof is omitted.
The closing member 60 of this embodiment is comprised only by one. The closing member 60 is made of, for example, resin and is formed in a cylindrical shape having a substantially rectangular cross section. The closing member 60 is attached to one strut 12 of the first main leg 10a via a fixed bracket 61. The fixed bracket 61 pivotally supports the closing member 60 by a pivot pin 61a so as to be rotatable.
The operator rotates the suspended member 60 that hangs down, and spans the tip of the closure member 60 to the receiving member 62 fixed to the other support column 12 of the first main leg 10a. It can be occluded (see the dashed line shown in FIG. 10). In addition, when the closing member 60 is rotated from the suspended state to the lying down state, a play is formed slightly in the front-rear direction with the fixed bracket 61 so as to avoid contact with the receiving member 62. It is preferable.

(Third embodiment)
FIG. 11 is a view showing a closing member 70 according to the third embodiment. The configurations other than the closing member 70 and the receiving member 71 described later are the same as those in the first embodiment, and the same reference numerals are given as appropriate, and the description thereof is omitted.
The closing member 70 of the present embodiment is configured to be extendable and contractible. The closing member 70 is made of, for example, resin, and is formed so that the elastic member 70b can be accommodated in a cylindrical body 70a having a substantially rectangular cross section. The closing member 70 is attached to one support column 12 of the first main leg 10a via a fixed bracket 41. The fixed bracket 41 pivotally supports the closing member 70 by a pivot pin 43 so as to be rotatable.
The operator rotates the standing cylinder 70a, expands the expansion / contraction member 70b, and bridges the tip of the expansion / contraction member 70b to the receiving member 71 fixed to the other support column 12 of the first main leg 10a. Thus, a part of the work space S can be closed (see the alternate long and short dash line shown in FIG. 11). Note that the closing member 70 is not limited to a configuration that can be expanded and contracted, and may be configured to be bendable.

As mentioned above, although this invention was demonstrated with various embodiment, this invention is not limited only to these embodiment, A change etc. are possible within the scope of the present invention.
In the present embodiment, the case has been described in which the frame member 30 is inclined so as to be upward, for example, about 7 degrees toward the tip 30a. However, the present invention is not limited to this case, and the frame member 30 may be arranged horizontally or substantially horizontally. Good.
In the present embodiment, the case where the closing member 40 is disposed below the frame member 30 has been described. However, the present invention is not limited to this case, and the closing member 40 is disposed at the same or substantially the same height as the frame member 30. Also good.
In the present embodiment, the case where the closing member 40 is made of resin has been described. However, the present invention is not limited to this case, and the closing member 40 may be made of metal or other material.

  1: Stepladder-type work table 10 (10a, 10b): Main leg 11: Rotating part 12: Support column 13 Step rail 20: Work floor top plate 21: Stay 30: Frame member 31: Frame member bracket 40: Closure member 41: Fixed bracket 42: Attached part 50: Lock part 51: Operation member 52: Sliding member 60: Closing member 70: Closing member

Claims (6)

A pair of main legs, the upper part of which is pivotally attached via a turning part and inclined outward toward the lower side;
A work floor top plate disposed between the pair of main legs;
A frame member disposed above the work floor top plate;
A closing member that surrounds a work space formed above the work floor top plate together with the frame member;
A stepladder-type workbench characterized in that a part of the work space is opened or closed by opening and closing the closing member.   The stepladder-type workbench according to claim 1, wherein the closing member is located at a height of 550 mm to 900 mm from the work floor top plate. The pair of main legs includes a long first main leg and a short second main leg, and a lower side than an upper end of the first main leg and an upper end of the second main leg are the rotating portion. Is pivotally attached via
3. The stepladder-type workbench according to claim 1, wherein the closing member is provided above the position of the first main leg where the second main leg is pivotally attached. .   The closing member is provided on the first main leg so as to be rotatable. The standing member opens a part of the work space by standing, and closes a part of the work space by lying down. The stepladder-type workbench according to claim 3. The main leg is formed with a pair of struts as a ladder,
The closing member is provided on each of the pillars of the first main leg so as to be freely rotatable, and is formed of a resin, a first closing member and a second closing member;
A lock member that holds a state in which a part of the work space is closed by the first closing member and the second closing member;
The lock member holds the first closing member and the second closing member by being spanned between the fallen first closing member and the fallen second closing member. The stepladder-type workbench according to claim 4. The frame member is provided on the first main leg so as to be foldable.
The stepladder according to any one of claims 3 to 5, wherein the closing member is provided below the frame member when surrounding the work space together with the frame member. Type workbench.

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