JP4658698B2 - Portable worktable - Google Patents

Description

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

  Conventionally, as shown in FIG. 18, for example, the portable work table 1 has a ladder-shaped main leg 4 formed by attaching a plurality of step bars 5 at appropriate intervals between a pair of support legs 4a. A rectangular top plate 3 is rotatably mounted between a pair of main legs 4, and a stay 7 is interposed between the top plate 3 and the main legs 4.

  Further, bar-like clue members 6 are erected at the four corners of the top plate 3 to serve as clues when the main leg 4 is raised and lowered. The clue member 6 is provided for provision according to the certification standards for portable worktables, and is always attached to a portable worktable whose top plate 3 surface height exceeds 1.5 m.

  However, the clue member 6 is intended to ensure safety when the main leg 4 is raised and lowered, and prevents falling from the top plate 3 when walking on the top plate 3 and working on it. Can not be planned.

  Therefore, as shown in FIG. 19, a U-shaped frame-shaped handrail 21 is separately prepared as means for preventing the fall from the top plate 3, and this is arranged between the clue members 6 along the longitudinal direction of the top plate 3. Separately set up.

  In use, the main leg 4 is lifted, the clue member 6 is gripped, and the work is performed while standing on the top plate 3 or walking. In this case, even if the work is distracted and slips on the top plate 3, the handrail 21 prevents the fall or fall from the top plate 3.

  The prior art is generally performed by those skilled in the art, and does not relate to a known literature.

  The portable work table as described above is rapidly spreading as a safe work table to replace a stepladder or the like. However, since the handrail 21 is not stipulated by the accreditation standard, in reality, it is often a retrofitted optional part. For this reason, since it takes time and effort to attach and remove the handrail for the worker, the work is often performed without attaching the handrail, and a fall / fall accident is often caused.

  Further, since the handrail 21 is a separate part, the number of parts is increased, and not only a space for transportation and storage is required, but also a slip processing work such as ordering becomes complicated and troublesome.

  An object of the present invention is to eliminate the inconvenience of the conventional example, and in a portable work table provided with a clue member, a handrail is made permanent, not retrofitted, by using this clue member. It is an object of the present invention to provide a portable work table that can be easily and easily assembled on the side of a plate, can prevent a fall / fall accident from the top plate, and can improve safety.

  In order to achieve the above object, according to the present invention, a top plate is bridged between a pair of ladder-shaped main legs, and a clue member for a hollow tube is erected at four corners of the top plate. In the portable work table, the handrail upper rail is housed in the handhold member so as to be freely drawn upward from the upper portion thereof, and the upper portion of the handhold member and the end portion of the handrail upper rail are rotatably connected. This connecting part is a cap that is mounted on the upper part of the clasp member and has a long hole for pulling out the handrail upper rail, and a lock that is formed at the end of the handrail upper rail and has a larger diameter than the long hole for the drawer. The gist of the invention is that it is constituted by a protruding portion.

  According to the first aspect of the present invention, since the handrail upper bar is attached to the clue member, the handrail upper bar is moved in the longitudinal direction of the top plate only by pulling the handrail upper bar with respect to the handcuff member and turning it. The opening above the side of the top plate can be blocked by the handrail upper rail, and therefore, the fall or fall from the top plate can be prevented.

  And the handrail upper rail is not attached retrofit, but it is attached to the clue member in advance as described above, so there is no need to prepare the handrail upper rail separately, it is possible to save the installation and removal, storage space and There is no need for transportation, and it can be attached with one touch.

  Further, when the upper rail of the handrail is not used, the upper rail of the handrail can be housed inside the clue member and does not get in the way, so it is convenient when a plurality of top plates are connected and used as a large stage.

  Furthermore, even in the case of an existing portable work table, if the handhold member is hollow, the handrail upper bar can be slidably stored in the handhold member, and a cap can be mounted on the handhold member to raise the handrail. Easy to attach the crosspiece.

  According to a second aspect of the present invention, the cap has an arc shape in cross section, a long hole is formed along the arc surface, and the locking protrusion formed on the handrail upper rail has a curved surface that matches the arc surface. Is a summary.

  According to the second aspect of the invention, since the locking projection is formed on the handrail upper rail, this locks to the edge of the long hole of the cap. Therefore, the handrail upper rail does not come out of the long hole. When the upper rail of the handrail is pulled out from the clue member in the maximum length in the vertical direction, if this is rotated, the curved surface of the locking projection slides along the arc surface of the cap, so the direction is smooth in the horizontal direction. The handrail upper rail can be easily disposed at a predetermined position.

  As described above, the portable workbench of the present invention is such that the handrail upper rail is attached to the handhold member so as to be slidable in the vertical direction and pivotable in the horizontal direction, so that the handrail upper rail is pulled up from the handhold member, Furthermore, by simply rotating horizontally along the longitudinal direction of the top plate, the upper rail of the handrail can be placed on the upper side of the top plate, and there is no need for a separate handrail member, and a special tool is required. Without the handrail, a handrail upper rail can be easily provided on the top board.

  When the upper rail of the handrail is rotated 90 degrees horizontally, the side portion of the upper rail of the handrail is locked so as to be placed on the edge of the long hole formed in the cap. The handrail upper rail is locked horizontally.

  Further, no special storage space or transport space is required for the balustrade upper rail, and it can be stored inside the clue member during storage and transport, and can be made compact without protruding as a separate member.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing an embodiment of the portable worktable of the present invention, FIG. 2 is a side view of the same, and the basic structure of the portable worktable of the present invention is the same as the conventional example shown in FIGS. Since they are basically the same, the same reference numerals are assigned and detailed description thereof is omitted here.

  The basic structure of the portable work table of the present invention is the same as in the prior art, and a plurality of step bars 5 are attached at appropriate intervals between a pair of support legs 4a to form a ladder-shaped main leg 4, and the ladder-shaped main leg. A rectangular top plate 3 is rotatably mounted between a pair of four, and a stay 7 that is bendable midway is interposed between the top plate 3 and the main leg 4.

  In addition, a clue member 6 of a hollow tube such as a circular tube or a square tube is positioned at the four corners of the top plate 3, that is, at the elevation opening between the main leg 4 and the top plate 3, and can be rotated from the main leg 4 with a mounting bracket. Established. The main legs 4 and the top plate 3 are made of aluminum as a material.

  According to the present invention, in the portable work table 1 having such a configuration, as shown in FIG. And an end of the handrail upper rail 8 are connected so as to be rotatable in the vertical direction.

  The structure of this connecting portion is composed of a cap 2 mounted on the upper portion of the clue member 6 and a locking projection 8a formed on the lower end portion of the handrail upper rail 8. The cap 2 has an upper rail for the handrail. 8 is formed with a diameter larger than that of the drawer long hole 2a and also serves as a pull-out preventing member.

  Further, the cap 2 is formed in a cross-sectional shape having at least an upper surface on the inner surface side having a spherical or cylindrical arc shape, the long hole 2a is along the arc surface, and the lower end edge is perpendicular to the clue member 6 The locking projection 8a formed on the handrail upper bar 8 is formed in a horizontal position and has a curved surface matching the arc surface, for example, a cylindrical shape shown in FIG. 4, and shown in FIGS. It is formed into a substantially spherical shape.

  The material of the clue member 6 and the handrail upper bar 8 is preferably aluminum or an aluminum alloy as being lightweight and having an appropriate strength, but iron, resin, or the like can also be used.

  6 to 10 show the structure of the connecting portion between the handrail upper bars 8c drawn from the handhold members 6 on both sides. A coil spring 10 is wound around the upper part of one handrail upper bar 8, and the coil spring 10 is wound. The connecting pipe 11 is covered with the handrail upper rail 8 of the turning portion.

  A groove 12 for connection is formed in the connection pipe 11 in a front arrow shape. In the figure, reference numeral 13 denotes a plate serving as a stopper for preventing the coil spring 10 from coming off, and closes the bottom opening of the connecting pipe 11.

  As shown in FIG. 10, a pin 14 to be inserted into the groove 12 is projected from the tip of the other handrail upper bar 8.

  Next, the usage will be described with reference to FIGS. FIG. 11 shows a state in which the handrail upper bar 8 is housed in the clue member 6 and is folded in parallel with the main leg 4 so as to be integrated therewith. If the handle member 6 is raised above the top plate 3 as shown in FIG. 12 from this state, the top plate 3 of the top plate 3 is stored in the state where the handrail upper rail 8 is housed in the handle member 6 as shown in FIG. Stands at the end.

  In order to dispose the handrail upper bar 8 above the side of the top plate 3 from this state, as shown in FIG. When pulled up, the locking projection 8a at the lower end comes into contact with the upper part of the inner surface of the cap 2, and further pulling is prevented.

  In this state, as shown in FIG. 15, if the handrail upper bar 8 is tilted in the longitudinal direction along the side of the top plate 3, the handrail upper bar 8 does not come out of the clue member 6 and is engaged in the connected state. The stop protrusion 8a rotates inside the cap 2, and the handrail upper rail 8 rotates vertically along the long hole 2a to the horizontal position.

  Then, as shown in FIG. 16, the handrail upper rail 8 is held in a horizontal position in a state where the handrail upper rail 8 is in contact with the lower end edge of the long hole 2a and further rotation is prevented, and the handrail upper rail 8 is held. 8 is disposed above the side of the top 3.

  Similarly, the handrail upper rail 8 on the other side is pulled out and disposed horizontally above the side of the top plate 3. Then, as shown in FIG. 10, the ends of both handrail upper rails 8 are brought together, and the pin 14 protruding from the other handrail upper rail 8 against the elasticity of the coil spring 10 is attached to one handrail. When the pin 14 is inserted into the groove 12 formed on the connecting pipe 11 provided at the tip of the upper bar 8 and then the position of the pin 14 is moved to the end of the groove 12, the pin 14 is moved by the elasticity of the coil spring 10. The position is locked (the state shown in FIG. 17).

  Thereby, as shown in FIG. 1, the handrail upper bars 8 and 8 of both sides are connected.

  When the handrail upper bar 8 is housed in the clasp member 6 by the reverse operation to the above when not in use, the portable workbench 1 does not protrude when folded flat.

  In addition, since the clue member 6 uses a square tube, sufficient strength can be secured.

  In all the embodiments, the state in which the clue member 6 and the handrail upper rail 8 are folded protrudes upward from the top plate 3 when a plurality of portable worktables 1 are connected and used as a large stage. It is possible to cope with the case where the member to be removed is eliminated.

It is a front view of the use condition which shows embodiment of the portable worktable of this invention. It is a side view which shows the use condition which shows embodiment of the portable worktable of this invention. It is a perspective view of the connection part of the clue member which is the principal part which shows embodiment of the portable worktable of this invention, and a handrail upper crosspiece. It is a perspective view of the handrail upper crosspiece which is the principal part which shows embodiment of the portable worktable of this invention. It is a vertical side view of the connection part of the handhold member which is the principal part which shows embodiment of the portable worktable of this invention, and a handrail upper crosspiece. It is a front view of the connection part provided in one handrail upper crosspiece which is the principal part which shows embodiment of the portable worktable of this invention. It is a side view of the connection part provided in one handrail upper crosspiece which is the principal part which shows embodiment of the portable worktable of this invention. It is a front view of the connection part of the state which pulled up one handrail upper rail which is the principal part which shows embodiment of the portable worktable of this invention. It is a side view of the connection part of the state which pulled up one handrail upper cross which is the principal part which shows embodiment of the portable worktable of this invention. It is a front view which shows the connection process of the connection part of the handrail upper crosses which is the principal part which shows embodiment of the portable worktable of this invention. It is a front view which shows the 1st process of the handrail upper crosspiece drawer which shows embodiment of the portable worktable of this invention. It is a front view which shows the 2nd process of the handrail upper crosspiece drawer which shows embodiment of the portable worktable of this invention. It is a front view which shows the 3rd process of the handrail upper crosspiece drawer which shows embodiment of the portable worktable of this invention. It is a front view which shows the 4th process of the handrail upper crosspiece drawer which shows embodiment of the portable worktable of this invention. It is a front view which shows the 5th process of the handrail upper crosspiece drawer which shows embodiment of the portable worktable of this invention. It is a front view which shows the 6th process of the handrail upper crosspiece drawer which shows embodiment of the portable worktable of this invention. It is a vertical side view of the connection part of the handrail upper crosses which is the principal part which shows embodiment of the portable worktable of this invention. It is a perspective view of the conventional portable worktable. It is a perspective view which shows the other example of the conventional portable worktable.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Portable worktable 2 ... Cap 2a ... Long hole 3 ... Top plate 4 ... Main leg 4a ... Strut leg 5 ... Stepping bar 6 ... Cue member 7 ... Stay 8 ... Handrail upper bar 8a ... Locking protrusion 21 ... handrail

Claims (2)

  In a portable work table in which a top plate is bridged between a pair of ladder-shaped main legs and a clue member of a hollow tube is erected at the four corners of the top plate, a handrail is placed inside the clue member from above. The rail is retractably stored upwards, and the upper part of the handrail member and the end of the handrail upper rail are rotatably connected. A portable work table comprising: a cap formed with an elongated hole; and a locking projection formed at an end portion of the upper rail of the handrail and having a larger diameter than the elongated hole for the drawer. The portable worktable according to claim 1, wherein the cap has an arc shape in cross section, a long hole is formed along the arc surface, and a locking projection formed on the handrail upper rail has a curved surface that matches the arc surface. .

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