JP3093699B2 - Workbench - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work bench such as a stepladder used when working in relatively high places such as interior finishing of ceilings, wiring and piping in ceilings at a construction site of a building or the like.

[0002]

2. Description of the Related Art As shown in FIG.
It is portable and foldable for convenient transport and storage, and therefore the uppermost work stage 1
And a pair of legs 3, 3, which are folded on the left and right sides of the work stage 1 from the standing state as shown by the pivotal support 2 along the rear surface of the work stage 1. However, the stepladder may have a vertically long, substantially pyramid-like shape without a work stage at the uppermost part, and a pair of legs may simply be opened and closed with the uppermost part as a pivot.

[0003] A pair of legs 3, 3 provided on both left and right sides of the worktable, as shown in the figure, spread downward in the front-rear direction.
Therefore, it has a pair of front and rear pillars 4 and 4 which are arranged in an inclined manner at a required inclination angle (αA in FIG. 2) and a step 5 attached between the both pillars. In some cases, the leg end tool 4a is connected to the extendable leg 4b to form the extendable pillar 4.

In such a work table, if the length of the leg 3 is long, that is, if the height from the ground contact surface to the uppermost portion 1 exceeds, for example, 1.5 m, the worker can use the work stage 1 or If there is a danger of falling unexpectedly when climbing or working on the top step 5, the top 1
In addition, it is demanded that a clue bar 6 (FIGS. 1 and 2) for an operator to protrude upward be provided.

[0005]

As described above, it is demanded that a clue rod is protruded from the top of the work table. However, the cue rod is simply fixed at the top of the work table. Although the structure is simple with only the protruding structure, the cue bar becomes a hindrance when transporting or folding the workbench. An object of the present invention is mainly to solve such difficulties.

[0006]

Means for Solving the Problems The present invention to achieve the above object, if are denoted the reference numeral in the figure, in the invention according to claim 1, both sides of the work stage 1 Pivot
As a fulcrum 2, a pair of legs 3, 3 are attached to be openable and closable in the left-right direction, and each leg 3 is disposed so as to spread downward in the front-rear direction, and thus to be obliquely inclined at a required inclination angle αA. in worktable made and a踏桟5 mounted between a pair of front and rear pedestals 4,4 and legs pillars is, to the pedestal 4, work
A ligature bar 6 protruding above the stage 1
In the folded state along the pillar 4 and the extended state protruding above the work stage 1,
Of the pair of legs 3 and 3 is pivotally attached to the base portion 6a of the leg portion 4 by a rotating means 10 provided near the pivot point 2 of the leg portion 4 so as to be rotatable in the same left and right direction as the opening and closing direction of the pair of legs 3 and 3. In the extended state in which the bar 6 protrudes above the work stage 1, the ligature bar 6 is extended on a vertical plane even though the pedestal 4 is inclined in the front-rear direction. In the folded state along the pillar 4, the clue rod 6 has its rotation locus corrected so that the clue rod 6 can be folded in accordance with the front-rear inclination angle plane of the pillar 4. The straightening means 7 is configured such that an upper protruding part 6b extending upward from the base end part 6a pivotally attached to the rotating means 10 is bent by a bent part 6c, and a bending angle of the bent part 6c is provided. αa is set equal to the inclination angle αA of the pillar 4 Is adopted.

According to the second aspect of the present invention, there is provided the extension lock means 8 for maintaining the extended state in which the clasp 6 projects above the work stage 1. It is made.

According to the third aspect of the present invention, a folding lock means 9 for maintaining the folded state of the clinching rod 6 along the pillar 4 is provided. It becomes.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a work table according to the present invention will be described below with reference to FIGS.

[0010] As shown in FIG. 1, the working stage 1 at the uppermost portion is folded on both right and left sides of the work stage 1 by a rotary connection metal fitting 2 as a pivot point so as to be substantially parallel to the lower surface of the stage 1, and is directed downward. A pair of legs 3 and 3 are provided so as to be openable and closable between an open leg state in which the inclined leg stands up and spreads downward. As shown in FIG. 2, each leg 3 extends downward in the front-rear direction, and thus is constricted by 5 ° with respect to the vertical plane S.
A pair of front and rear pillars 4 and 4 disposed at an angle of inclination αA of the same and a step bar 5 attached between the two pillars, and the pillar 4 is a leg end tool at the lower end of the pillar. 4a telescopic legs 4b
And is formed to be extendable and contractible.

[0011] Then, as shown in FIG.
Is one of the left and right legs 3, 3.
A ligature bar 6 having a length of, for example, 60 cm and projecting above the work stage 1 in accordance with the inclination angle of the leg 3 in the left-right direction is extended as shown by an arrow a. In a state of being folded along the leg 3, it is pivotally mounted by the rotation means 10.

Thus, as the main part of the present invention, as shown in FIG.
In the extended state protruding above the rotary connection fitting 2, the ligature bar 6 is extended on the vertical plane S although the pedestal 4 is inclined in the front-rear direction. As shown in FIG. 3, when the clue bar 6 is in the folded state along the pillar 4, the clue bar 6 is adjusted to the inclination angle αA of the pillar 4 in the front-rear direction, that is, the inclination angle surface αA of 5 °. The rotating means 10 is provided with a rotating surface correcting means 7 for the clinch bar 6 whose rotational trajectory is corrected so as to be folded.

As shown in FIG. 2, in the extended state, the ligature bar 6 has a base end portion 6a from the position where the rotating means 10 is located to the work stage 1, and has an inclination angle α of the pillar 4.
A, and the upper protruding portion 6b is bent from the upper end of the base end portion 6a so as to protrude to the vertical plane S by the bent portion 6c. Therefore, as shown in FIG. 4 or FIG. 5, the inclination angle αa of the bent portion 6c is 5 °.

The rotating means 10 and the rotating surface correcting means 7 are shown in FIG.
6 to FIG. That is, as shown in FIG. 6A, particularly as shown in FIG. 4, a case-shaped fixing bracket 11 is attached to the pillar 4 with screws 12, and as shown in FIG. 6B, particularly as shown in FIG. In addition, the case-shaped rotary bracket 13 is fixed to the wand rod 6 similarly to the fixed bracket 1.
It is attached by a screw 12 to face 1. As shown in FIG. 6 (a), especially FIG.
The opposing wall 14 facing the first rotating bracket 13 is constricted downward, that is, the upper wall 15 is wide and the lower wall is narrow 16, and the opposing wall connects the wide upper wall 15 and the narrow lower wall 16. Is formed on the inclined wall 14 having an inclination angle αB of 2.5 ° with respect to the inclined surface of the pillar 4, and a pivot 17 for rotation is protruded from the center of the inclined wall 14. . The rotation pivot 17 is provided with a retaining collar 18.

Accordingly, the rotation pivot 17 is also provided so as to project at an inclination angle αB of 2.5 ° with respect to the inclined surface of the pillar 4. Then, as shown in FIG. 6A, an upward U-shaped upper lock hole 19 is formed on the upper side of the fixed bracket 11 from the upper wall 15 to the inclined wall 14, and the lower wall 16 is formed on the lower side of the fixed bracket 11. Similarly, a lower lock hole 20 having a downward U-shape 1 is formed from the bottom to the inclined wall 14.
Further, inside the fixed bracket 11, the pivot 1 for rotation is provided.
7, a rotary lock plate 21 is pivotally mounted, and the lock plate 2
1, upper and lower lock claws 2
2 and 23, a release lever 24 is provided on a side of the lock plate 21 so as to protrude from an elongated hole 26 of a side wall 25 of the fixed bracket 11, and the urging force of a helical lock spring 27 is always provided. As a result, both upper and lower lock claws 22 and 23 of the rotation lock plate 21 protrude into the upper lock hole 19 and the lower lock hole 20, respectively, so that the two lock holes 19 and 20 are locked.
By moving the release lever 24 upward along the elongated hole 26 against the urging force of the lock spring 27, as shown by a chain line in FIG. The upper and lower lock pawls 22 and 23 recede from the upper and lower lock holes 19 and 20 to open the entrances of the lock holes 19 and 20.

Further, as shown in FIG. 6B, particularly, as shown in FIG. 5, the opposed wall 28 of the rotating bracket 13 facing the fixed bracket 11 has a constricted shape, that is, the upper wall 29 is narrow. The lower wall 30 is wide, and the opposing wall 28 connecting the narrow upper wall 29 and the wide lower wall 30 has an inclination angle α of 2.5 ° with respect to the inclined surface of the pillar 4.
b is formed in the upper converging inclined wall 28, and a vertically long hole 31 is formed in a central portion of the upper constricting inclined wall 28, in which the rotating pivot 17 protruding from the fixed bracket 11 is fitted and supported. And the upper and lower lock holes 19 and 20 formed in the fixing bracket 11 on the same vertical line as the vertically long holes 31.
A lock pin 32 that fits and locks with the projection is provided. The lock pin 32 is provided with a retaining collar 33.

As shown in FIG. 2, when the pair of ligature bars 6 are in the extended state protruding above the work stage 1, as shown in detail in FIG. The lower converging inclined wall 11 and the rotating pivot 17 protruding from the inclined wall 14 are fitted and pivotally supported in the vertically long hole 31, and the upper side of the ligature bar 6 which contacts the lower constricting inclined wall 14. With the constriction inclined wall 28, the former constriction inclination angle αB is 2.5 °, whereas the latter constriction inclination angle αb is 2.5 °. ,
As is clear from the state of FIG. 4, the mutual inclination angles αB, α
b are offset and the pedestal 4 and the proximal end 6a of the wand 6 are consequently pivoted parallel to each other, so that the proximal end 6a is The inclination angle αa is 5 °, which is the same as that of the pillar 4. On the other hand, the upper portion 6b is in an upright state on the vertical plane S because the bending angle αa is 5 ° (FIG. 2).

On the other hand, as shown in FIG. 3, when the ligature bar 6 is folded along the pillar 4, as shown in detail in FIG. The swivel rod 6 and thus the movable bracket 13 are rotated by 180 ° with respect to the constricted inclined wall 14 about the rotation pivot 17 fitted and supported by the vertically long hole 31, thereby tilting the rotation bracket 13. The wall 28 is fixed to the fixed bracket 11.
And the sum of the inclination angles αB and αb of the two is naturally 5 °, the rotation locus of the ligature bar 6 is corrected, and the pedestal 4 and the hand The bar portion 6 is pivotally connected to the base portion 6a at an inclination angle αa of 5 °, whereas the upper portion 6b is bent at a bending angle αa.
Is 5 °, it is folded along the pillar 4 (FIG. 3).

Therefore, according to the above description, the fixed bracket 11, the rotating pivot 17 protruding from the fixed bracket 11, the movable bracket 13 and the vertically long hole 31 formed in the movable bracket 13 are mainly composed of the rotating means 10.
The inclined walls 14 and 28 of the fixed bracket 11 and the movable bracket 13, the pivot 17 for rotation and the vertically elongated hole 31 mainly constitute the rotation locus correcting means 7. It is clear that their functions complement each other.

Further, according to the embodiment of the present invention, as shown in FIG. 2, when the ligature bar 6 protrudes and extends above the pivot point 2 of the uppermost portion 1, the extension locking means maintains the extended state. 8 and, as shown in FIG. 3, folding lock means 9 for maintaining the folded state when the ligature bar 6 is folded along the pillar 4 is provided, and the structure is shown in FIGS. 6 (a) to 6 (c). 7 (a) to 7 (d). First, as shown in FIG. 7 (a), the ligature bar 6 is rotated so as to protrude upward and fixed. When the lock pin 32 is positioned above the upper lock hole 19 of the bracket 11, the ligature bar 6 is pressed downward as shown by the arrow in FIG. Lock pin 32 is above fixing bracket 11 It fits into the lock hole 19. At the time of this fitting, the upper lock claw 22 that has closed the entrance of the upper lock hole is pressed by the lock pin 32 and retreats against the biasing force of the lock spring 27, and the lock pin 32 is
9, the lock pin 32 is released from the pressing action of the lock pin 32, so that the upper lock claw 22 is urged by the lock spring 27 and protrudes so as to close the upper lock hole 22. Since it is impossible to escape from the lock 19, the clasp 6 supported by the lock pin 22 is maintained in a state of protruding and extending upward as shown in FIG.

Next, as shown in FIG. 7 (b), the release lever of the rotation lock plate 21 is pressed against the urging force of the lock spring 27 in order to rotate the hand bar 6 in the folded state. 24, the upper lock claw 22 is retracted from the upper lock hole 19 to open the entrance of the lock hole 19, and in this state, the ligature bar 6 is pulled upward as shown by the arrow to lock the lock pin 32. Escape from the upper lock hole 19,
Thereafter, as shown by the arrow, the rotation is performed with the rotation pivot 17 as a fulcrum, and the ligature bar 6 and the lock pin 32 are positioned immediately below the lower lock hole 20 as shown in FIG. The lifting pin 6 is lifted upward as shown by an arrow, so that the lock pin 32 is fixed to the lower lock hole 2 of the fixing bracket 11 as shown in FIG.
0 is fitted. At the time of this fitting, the lower lock claw 23 closing the entrance of the lower lock hole 20 is pressed by the lock pin 32 and retreats against the urging force of the lock spring 27, and the lock pin 32 is moved to the lower lock hole 20. When the lock pin 32 is completely fitted, the lock pin 32 is released from the pressing action, so that the lower lock claw 23 is urged by the lock spring 27 and protrudes so as to close the lower lock hole 20. Since it becomes impossible to escape from the lock pin 32, the ligature bar 6 supported by the lock pin 32 is maintained in a folded state along the pillar 4 as shown in FIG. In addition,
It goes without saying that in order to return from the state shown in FIG. 7D to the state shown in FIG.

As is apparent from the above description, in the embodiment of the present invention, the rotation lock plate 21, the upper lock hole 19, the upper lock claw 22, the lock pin 32, the lock spring 27, and the unlock lever 24 are provided. Constitutes the extension lock means 8, and the rotation lock plate 21, the lower lock hole 20, the lower lock claw 23, the lock pin 32, the lock spring 27 and the unlock lever 24 constitute the folding lock means 9.

As described above, according to the present invention, when the ligature bar 6 protrudes and extends upward as shown in FIG. 2, the ligature bar 6 protrudes vertically. When the worker is positioned on the work stage 1 or the step 5, it is possible to work with stability and perform work safely.

Further, when the ligature bar 6 is folded from the extended state, the ligature bar 6 is folded along the pillars 4, so that it does not become bulky, and the ligature bar 6 is in the extended state to the folded state. The operation is easy because the swivel bar 6 only needs to be rotated up to this point and it is not necessary to remove the wand bar 6 from the pillar 4.

Moreover, the extended state or the folded state of the clinching bar 6 can be maintained by simply pushing or pulling the clinching bar 6 downward or upward by the lock means, which is safe and easy to operate. There is a merit that is.

[0026]

According to the first aspect of the present invention, when the ligature bar protrudes and extends upward from the worktable, the ligature bar protrudes vertically. When it is located on the step, it is possible to work stably and work safely.

Further, when the ligature bar is folded from the extended state, the ligature bar is folded along the pillar, so that it is not bulky, and the ligature bar extends from the extended state to the folded state. The operation is easy because it is sufficient to simply rotate the rod and it is not necessary to remove the rod from the pillar.

According to the second aspect of the present invention, when the ligature bar is in the extended state protruding upward from the worktable, the extended state can be maintained firmly, and the operation is simply performed by the ligature. The operation is also easy because the rod only needs to be pushed down slightly.

According to the third aspect of the present invention, when the clasp is folded along the pillars, the folded state can be maintained firmly, and the transport and storage can be performed safely. The operation is easy because it is only necessary to push up the clasp slightly upward.

[Brief description of the drawings]

FIG. 1 is a front view of a workbench according to an embodiment of the present invention, showing an extended state of a clasp bar.

FIG. 2 is a side view of the same.

FIG. 3 is a side view showing the folded state of the clasp bar.

FIG. 4 is a side view of a main part of the ligature bar in the extended state in the embodiment.

FIG. 5 is a side view of a main part of the clasp bar in the folded state in the embodiment.

FIGS. 6A to 6C are exploded perspective views of main parts of the embodiment.

FIGS. 7A to 7D are diagrams illustrating an operation order in the embodiment.

FIG. 8 is a perspective view showing a conventional work table.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top part 1 (work stage) 2 Pivot point (rotation connection metal fitting) 3 Leg part 4 Pillar 5 Step beam 6 Lugging stick 7 Rotation locus correction means 9 Folding lock means 10 Rotation means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E04G 1/32 E04G 1/26 E04G 1/34 E06C 7/18

Claims (3)

(57) [Claims] 1. A pair of legs are mounted to be openable and closable in the left-right direction with both sides of a work stage as pivot points.
A workbench comprising a pair of front and rear legs and a stepboard attached between the two legs, which are arranged to be spread downwardly in the front-rear direction, and thus obliquely inclined at a required inclination angle, the pedestal, the length of the hand darning rod projecting above the work stage, over a extended state projecting above the work stage and folded along the pedestal, the leg proximal portion of該手darning rod A pivot means pivotally provided in the same lateral direction as the opening and closing direction of the pair of legs by a rotating means provided in the vicinity of the pivot point of the part, so that the ligature bar projects upward from the work stage in an extended state. Therefore, the clue bar is extended on the vertical plane even though the pedestal is inclined in the front-rear direction, and when the clue bar is in a folded state along the pedestal, the cue bar is Fold in accordance with the front-rear angle Means for correcting the rotation trajectory of the clinging bar, wherein the correcting means has an upper protruding portion extending upward from the base end portion pivotally connected to the rotating means, and is bent by a bending portion; A workbench having a configuration in which a bending angle of a bent portion is set to be equal to an inclination angle of the pillar. 2. The work table according to claim 1, further comprising an extension lock means for maintaining an extended state in which the clasp bar projects above the work stage . 3. The workbench according to claim 1, further comprising a folding lock means for maintaining the folding bar along the pillars.