JP5300587B2 - Portable work table moving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a convenient moving device for a portable workbench, easily implemented to an existing workbench including wheels to be grounded by inclining main legs, allowing stable movement without a risk of falling during movement, sufficiently supporting a load and facilitating handling in putting in and out casters without a particularly large increase in the whole weight. <P>SOLUTION: The moving device for the portable workbench with a rectangular top plate extended between the ladder-like main legs is constituted by mounting a mounting part 13 detachably to the main leg 1, mounting one end of an operating lever 14 to the upper part of the mounting part 13 and mounting one end of a caster mounting plate 15 to the lower part of the mounting part 13 respectively in a vertically turnable manner, connecting the operating lever 14 to the caster mounting plate 15 mounted with the caster 21, by a connecting arm 23, and mounting a compression coil spring 20 for energizing the caster mounting plate 15 to turn upward, resiliently between the mounting part 13 and the caster mounting plate 15. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a portable work table moving device for use in construction work sites, interior / exterior work such as ceilings and wall surfaces of buildings, electrical wiring work, and the like.

  For example, Patent Document 1 discloses that a portable work table can be easily moved by one person and can improve transport workability even when the work table is in an assembled state or in a folded state. There is something to show.

  As shown in FIG. 6, a ladder frame 3 is formed by attaching a plurality of step bars 2 at appropriate intervals between a pair of main legs 1 having handrail columns 4 extended on the upper portion. The upper ends of the pair of ladder frames 3 are pivotably attached to each other so that the upper ends of the pair of ladder frames 3 can be folded between the ladder frames 3 at the upper position between the main legs 1. In this embodiment, handrail frames 8 and 9 protruding outward are foldably attached, and a moving wheel 10 is attached to the lower part of the main leg 1.

  In order to move the work table using the wheels 10, the lower part of one ladder frame 3 is lifted to incline the entire work table, and the wheel 10 attached to the other ladder frame 3 is grounded and moved. .

  By the way, in order to secure a wide working space, as shown in FIG. 7, at least a pair of stepped work tables 11 as described above are prepared, and the tread board units 6 respectively disposed on the upper portions of the pair of work tables 11. There is a type in which the connecting plate 12 is detachably placed between them (see, for example, Patent Document 2).

  Further, although not shown in the drawings, the connecting plate 12 spanned between the pair of work tables 11 as described above is arranged in parallel with a gap therebetween, and another top plate is placed in the direction perpendicular to the connecting plate 12 between them. In some cases, they are connected to form a wider stage.

  The portable work table constituted by the combination of the work table 11 and the connecting plate 12 is assembled and assembled (stage assembly) at the work site. And in order to move to an adjacent work area after completion | finish of work, after removing the connection of the work table 11 and the connection board 12, after raising both main legs 1 about the work table 11, the other main leg 1 is lifted. The wheels 10 attached to the vehicle 10 are moved one by one in a grounded state, or the whole is folded and transported together with the connecting plate 12 using a cart.

  At the work site, for example, when moving to the adjacent work area, the moving distance is short, and although it is immediately used again in the adjacent work area, the work table is temporarily folded in the current work work area and transported to the adjacent work area. Here, the process of reassembling is required, and workability is not good.

  Therefore, there is a vehicle equipped with a wheel 10 that can move a work table to an adjacent work area without lifting one main leg (see, for example, Patent Document 3).

  This is because a lower stepped-piece tray that supports the lowermost step rail of the main leg and an upper stepped-piece tray that supports the upper stepped rail are respectively provided above and below the vertical frame, and the lowermost end of the main leg is provided on the vertical frame. A moving wheel that protrudes further downward is provided, and the moving device is attached to a step bar.

The vertical frame is formed to be extendable and retractable as a double-pipe structure so that the distance between the lower stepping tray and the upper stepping tray can be adjusted.
JP-A-2005-273304 JP 2002-188284 A Patent No. 3993842

  Since the moving device disclosed in Patent Document 3 is attached to a step rail, the load is supported via the wheels and the step rail of the moving device, and it cannot be said that the strength is sufficient.

  In addition, since the moving device is arranged inside the main legs that are wide open, the ground contact position of the wheel, that is, the point that supports the load, comes in from the position of the main legs, and the tipping angle of the work table is reduced. And unstable.

  In addition, an extension telescopic leg is attached to the lower part of the main leg to be telescopically attached to the work table side, and there is a double tube structure expansion mechanism, but the moving device is also equipped with a double tube structure expansion mechanism. Therefore, the weight is increased as a whole, and both the work table side and the moving device side are required for the expansion and contraction operation, which requires labor and is not easy to handle.

  The present invention eliminates the inconveniences of the conventional example, and can move in a stable state without fear of overturning when moving, sufficiently support the load, and handle the casters without particularly increasing the overall weight. It is also easy to implement a portable work table moving device that can be easily implemented on an existing work table provided with wheels that are grounded by tilting the main legs.

  The present invention according to claim 1 is a portable work table moving device in which a rectangular top plate is spanned between ladder-shaped main legs, and an attachment portion is detachably attached to the main legs. One end of the operating lever is attached to the upper part of the unit, and one end of the caster mounting plate is pivotally attached to the lower part. The operating lever and the caster mounting plate having the caster attached to the lower part are connected by a connecting arm and the caster. The gist is that a compression coil spring that urges the mounting plate to rotate upward is elastically mounted between the mounting portion and the caster mounting plate.

  According to the first aspect of the present invention, since the moving device can be attached to the main leg by the attaching portion only when necessary, the moving device does not get in the way when not in use, and the usability according to the use mode can be improved. When in use, the caster can be grounded by simply attaching it to the main leg and turning the operation lever against the elasticity of the compression coil spring, and the main leg can be lifted off the ground surface. The portable worktable can be moved in the assembled state without the need to remove the top plate.

  Moreover, since the moving device can be directly attached to the main leg with the minimum necessary members, the load applied to the caster can be directly transmitted to the main leg, and a sufficient strength can be ensured.

  The gist of the present invention described in claim 2 is that the caster mounted on the caster mounting plate moves to a grounding position below the main leg by turning the operation lever downward.

  According to the second aspect of the present invention, the operation lever is rotated by simply pushing it downward, and the rotation of the operation lever is transmitted to the caster mounting plate via the connecting arm, so that the caster is lowered to the grounding position.

  The gist of the present invention described in claim 3 is that a stopper for locking the caster at the ground contact position is formed on the operation lever.

  According to the third aspect of the present invention, when the caster is lowered to the grounding position, the operation lever is prevented from further rotation, so that the caster can be locked at the grounding position.

  As described above, in the portable work table moving device of the present invention, since the casters are independently attached to the respective main legs, the casters do not enter the inside of the ladder-shaped main legs, and there is a risk of falling when moving. Can move in a stable state. In addition, for example, when a portable work table with a top plate spanned between ladder-shaped main legs is moved in the as-assembled state, it can be easily attached to the main legs only when necessary. It will not get in the way.

  Since it is not necessary to provide a conventional telescopic mechanism with a double-pipe structure in the moving device, handling of casters can be handled with one-touch operation by lever operation without any significant increase in overall weight. It ’s good.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a portable work table according to an embodiment of the present invention in a non-use side view. FIG. 2 is a side view of the portable work table in which the mobile device of the present invention is used. For example, the configuration is as described above with reference to FIGS. 6 and 7, and detailed description thereof is omitted here.

  The moving device of the present invention is attached to a moving plate 12 that is detachably spanned between tread plate units 6 that are respectively arranged on the upper part of at least a pair of stepladder-shaped worktables 11 as shown in FIG. If the extension leg 5 is attached to the lower part of the main leg 1, the extension leg 5 is attached to the lower part of the main leg 1 or the extension leg 5 by tilting the main leg 1. A moving wheel 10 to be grounded is fixedly attached.

  The moving device includes, as a basic structure, a mounting portion 13 that is detachably attached to the main leg 1, an operation lever 14 that is pivotally mounted on the upper portion of the mounting portion 13, and a lower portion of the mounting portion 13. A caster mounting plate 15 whose one end is pivotably mounted, a connecting arm 23 that connects the operation lever 14 and the caster mounting plate 15, a shaft mounting portion 16 of the mounting portion 13 and the operation lever 14, and a caster mounting plate 15 and a compression coil spring 20 that is elastically mounted between them.

  As shown in FIG. 1 and FIG. 2, the mounting portion 13 is formed by combining a short channel-shaped mounting member 13 a and a long channel-shaped mounting member 13 b back to back. The opening is fitted to the main leg 1 and attached with a bolt or the like.

  In this state, the long attachment member 13b is attached to the main leg with the opening portion facing away from the main leg 1.

  One end of the operation lever 14 is pivotally attached to the upper part of the long attachment member 13b so as to be rotatable in the vertical direction. The operation lever 14 is formed of a side L-shaped channel member, and a stopper 14a by a notch is formed in the vicinity of the L-shaped corner.

  The lower part of the long attachment member 13b is formed in an oblique cutout 22 so as not to hinder the movement of the caster 21 when it is lowered.

  One end of the caster mounting plate 15 of the caster 21 is connected to the lower portion of the long mounting member 13b so as to be pivotable in the vertical direction to form a shaft mounting portion 18.

  And the corner | angular part of the L-shaped operation lever 14 and the upper part of the caster mounting plate 15 are rotatably connected by the connecting arm 23, and the connecting portion with the operation lever 14 is connected to the shaft mounting portion 17 a and the caster mounting plate 15. The connecting portion is referred to as a shaft attachment portion 17b.

  Further, the other end of the compression coil spring 20 having one end attached to the shaft attachment portion 16 is coupled to the middle between the shaft attachment portion 17 b and the shaft attachment portion 18, and this is referred to as a shaft attachment portion 19. Accordingly, the operation lever 14 and the caster mounting plate 15 are biased so as to be pulled upward by the elasticity of the compression coil spring 20.

  Next, the operation will be described. When the moving device is not used, it is not attached to the main leg 1. At the time of use, a short mounting member 13a is fitted into the main leg 1 and fixed with bolts. In this state, the operating lever 14 and the caster mounting plate 15 are pulled up by the elasticity of the compression coil spring 20 as shown in FIG. 1, and the caster 21 is in a position floating from the ground surface.

  In order to move the portable worktable using the caster 21 from this state, if the operation lever 14 is pushed downward against the elasticity of the compression coil spring 20, the operation lever 14 is moved downward with the shaft attachment portion 16 as the center. , The connecting arm 23 is pushed downward via the shaft mounting portion 17a, and the rotation of the connecting arm 23 is transmitted to the caster mounting plate 15 via the shaft mounting portion 17b. The caster 21 moves in the direction of the ground contact position by rotating downward about the portion 18 as a central axis.

  The compression coil spring 20 expands against the urging direction as the operating lever 14, the connecting arm 23 and the caster mounting plate 15 are lowered, but after the shaft mounting portions 16, 17a and 17b are positioned on a straight line, as shown in FIG. When the connecting arm 23 and the operation lever 14 are rotated to the position where the shaft mounting portion 17a is located on the inner side (left side in FIG. 1) of the shaft mounting portion 16 and the shaft mounting portion 17b, that is, to the ground contact position, the connection is established. The arm 23 abuts against a stopper 14a formed on the operation lever 14, and further downward rotation of the operation lever 14 is prevented. The operation lever 14, the connecting arm 23 and the caster mounting plate 15 are brought into this grounding position. Locked.

  In this grounding position, the compression force of the compression coil spring 20 still acts on the operation lever 14, the connecting arm 23, and the caster mounting plate 15, but as described above, from the line connecting the shaft mounting portion 16 and the shaft mounting portion 17b. Since the shaft mounting portion 17a is located on the inner side (left side in FIG. 1), even if a force is applied to the caster mounting plate 15 in the direction of pulling it up by the compressive force, the middle of the connecting arm 23 is the operation lever. Accordingly, the connecting arm 23 is prevented from moving in the pulling direction.

  Thereby, the caster 21 is fixed to the grounding position. Therefore, if the moving device is attached to all the main legs 1 as described above, the entire portable work table can be easily moved while the top plate is attached to the ladder-like work table.

  In order to remove the moving device, the caster 21 is lifted from the grounding position by pulling up the operating lever 14 by the operation opposite to that described above. Therefore, the attachment member 13a may be removed from the main leg 1 in this state.

  The configuration of the mounting portion 13 for mounting the moving device to the main leg 1 is not limited to the above-described structure, and a one-touch type mounting bracket 24 shown in FIGS. 3 to 5 can also be used.

  In this, an operation lever 24b is rotatably attached to one end of a planar U-shaped metal fitting body 24a, and a locking piece 24c is attached to the operation lever 24b.

  In order to attach the moving device to the main leg 1 using the mounting bracket 24, the metal fitting body 24a is fitted to the main leg 1 from the side as shown in FIG. Next, as shown in FIG. 5, the operation lever 24b is rotated to close the opening of the metal fitting body 24a with the locking piece 24c.

It is a side view of the non-grounding state which is a front view which shows embodiment of the movement apparatus of the portable worktable of this invention. It is a side view of the grounding state which shows embodiment of the moving apparatus of the portable worktable of this invention. It is a side view which shows the other example of the attaching part which shows embodiment of the moving apparatus of the portable worktable of this invention. It is a top view before fixation which shows the other example of the attaching part which shows embodiment of the moving apparatus of the portable worktable of this invention. It is a top view of the fixed state which shows the other example of the attaching part which shows embodiment of the moving apparatus of the portable worktable of this invention. It is a perspective view of a stepladder-like portable worktable. It is a perspective view of the portable worktable which connected the top plate.

DESCRIPTION OF SYMBOLS 1 Main leg 2 Step rail 3 Ladder frame 4 Handrail support | pillar 5 Extension leg 6 Tread board unit 8 Handrail frame 9 Handrail frame 10 Wheel 11 Worktable 12 Connection board 13 Attachment part 13a Short attachment member 13b Long attachment member 14 Operation lever 14a Stopper 15 Caster mounting plate 16 Shaft mounting portion 17a 17b Shaft mounting portion 18 Shaft mounting portion 19 Shaft mounting portion 20 Compression coil spring 21 Casters 22 Notch portion 23 Connecting arm 24 Mounting bracket 24a Bracket body 24b Operation lever 24c Locking piece

Claims (3)

  A portable work table moving device in which a rectangular top plate is spanned between ladder-shaped main legs. A mounting portion is detachably attached to the main leg, and one end of an operation lever is attached to the upper portion of the mounting portion. , One end of the caster mounting plate is pivotably mounted on the lower part, and the operation lever and the caster mounting plate with the caster mounted on the lower part are connected by a connecting arm and the caster mounting plate is pivoted upward. A portable work table moving device, characterized in that a compression coil spring urging is elastically mounted between the mounting portion and a caster mounting plate.   2. The portable work table moving device according to claim 1, wherein the caster mounted on the caster mounting plate is moved to a grounding position below the main leg by rotating the operation lever downward.   The portable work table moving device according to claim 1 or 2, wherein a stopper for locking the caster at the grounding position is formed on the operation lever.

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