JP4190486B2 - 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.

Such a portable work table 1 is also disclosed in the following patent document. For example, as shown in FIG. 16, a plurality of step bars 5 are attached at appropriate intervals between a pair of support legs to form a ladder-shaped main leg 4. A rectangular top plate 3 is rotatably mounted as a work floor between a pair of the ladder-shaped main legs 4, and a stay 7 is bent between the top plate 3 and the main legs 4. Disguise.
Japanese Patent Laid-Open No. 11-100805

  The portable worktable 1 is used by being installed on a work surface provided on the ground or at a high place on a construction site. After the work is completed, the stay 7 is folded at the bent portion 8 and the portable worktable 1 is folded. , Can move.

  Therefore, in the portable work table 1, from the viewpoint of weight reduction, the top plate 3 is composed of an aluminum member such as a combination of an aluminum extruded shape, a combination of an aluminum plate and an aluminum shape, and the main leg 4 and the step 5 are also included. For example, it is comprised from the aluminum extrusion shape material.

  In this type of work table, the height of the work floor portion is less than 2 m, and the anti-slip hole 2 is provided as a non-slip measure in the top plate 3 which is the work floor surface.

  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 stipulated for installation according to the certification standards for portable worktables, and is always attached to the portable worktables.

  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. 17, 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 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 the labor and time for attaching and removing the handrail are increased 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, the present invention provides a portable work table in which a top plate is bridged between a pair of ladder-shaped main legs, and clasp members are provided at four corners of the top plate. And has a length of about one-half of the length of the top plate at the tip of the clasp member, and projects horizontally from the counter member at the opposite position along the length of the top plate. A hand that can be folded flat with respect to the clue member when it is close to each other and connected by abutment, and when the connection is released, it rotates vertically downward so as to be parallel to the clue member. The gist of the invention is that the sliding upper rail is attached so as to be rotatable in the vertical direction.

  According to the first aspect of the present invention, since the handrail upper bar is attached to the tip of the clue member, the handrail upper bar can be moved in the longitudinal direction of the top plate only by rotating the handrail upper bar with respect to the handhold member. It can be arranged along the top and can prevent falling or falling from the top board. The handrail upper rail is not attached retrofit, but is attached to the clue member in advance as described above, so there is no need to prepare a handrail member separately, and it is possible to save the installation and removal, storage space and transportation. Is also unnecessary, and it can be installed with one touch.

  In addition, when a plurality of top plates are connected and used as a large stage, and the handrail upper rail is not necessary, the handrail upper rail can be rotated and folded in parallel with the clue member so that it does not protrude. It does not get in the way.

In addition, if the handrail upper beam is rotated from the handhold member at the opposite position and arranged in the longitudinal direction of the top plate, the tip of the handrail upper beam at the opposite position is connected, and it can be easily performed along the longitudinal direction of the top plate. A handrail is formed on the surface.

  The gist of the invention according to claim 2 is that the lower end of the clue member is pivotally attached to the upper part of the main leg so as to be folded in parallel with the main leg.

  According to the invention of claim 2, by further folding the clue member in which the handrail upper rail is folded in parallel with the main leg, the protruding member can be eliminated on the top plate, and a plurality of portable types In the case of forming a large stage connected with work benches, the handrail upper rail and the clue member do not get in the way.

  The gist of the invention described in claim 3 is that the main leg is rotatably attached to both ends of the top plate.

  According to the invention of claim 3, the clue member in which the handrail upper rail is folded in parallel as described above is further folded in parallel with the main leg, and the main leg is folded in parallel with the top plate. The entire workbench can be folded flat, easily transported and requires little storage space.

  As described above, in the portable worktable of the present invention, the handrail upper rail is rotatably attached to the handhold member, and therefore the handrail upper rail is pulled from the handhold member to the upper side part along the longitudinal direction of the top plate. By simply raising the handrail, the top rail can be placed on the top side of the top plate, and it is easy to install the top rail on the top plate without the need for a separate handrail member or special tools. Can be provided.

  Further, no special storage space or transport space is required for the handrail member, and it can be folded flat in parallel with the top plate and the main leg during storage and transport, and can be made compact.

  Further, since the handrail member is attached to the clue member, it is possible to prevent the handrail from being forgotten to be attached at the time of use, and the handrail member can be surely disposed, thereby increasing the safety. In addition, since it is possible to eliminate the trouble of separately ordering only the handrail member, it is possible to eliminate clerical work.

  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 a portable workbench according to the present invention, and the basic structure of the portable workbench according to the present invention is basically the same as the conventional example shown in FIGS. Therefore, 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 the conventional structure, and a plurality of step bars 5 are attached at appropriate intervals between a pair of support legs to form a ladder-shaped main leg 4. A rectangular top plate 3 is pivotably attached between the pair of members, and a stay 7 that can be bent midway is interposed between the top plate 3 and the main leg 4.

  In addition, a rod-like clasp member 6 is erected from the main leg 4 so as to be rotatable by mounting brackets at the four corners of the top board 3, that is, at the lifts of the main leg 4 and the top board 3. These main legs 4, top plate 3 and clue member 6 are made of aluminum.

  In the portable work table 1 having such a configuration, as shown in FIG. 1, the bar-shaped handrail upper rail 9 is rotated in the vertical direction along the longitudinal direction of the top plate 3 by the bracket 8 at the upper end of the clue member 6. I attached it freely.

  The bracket 8 may be of any structure as long as it supports the handrail upper rail 9 so that it can rotate and can support the handrail upper rail 9 in the horizontal direction with respect to the clue member 6 in the standing state. However, as shown in FIG. 5, a plurality of notch holes 8a and 8b are formed in the fan-shaped plate body, and pins 30 provided on the handrail upper rail 9 are inserted into the notch holes 8a and 8b. Thus, the state along the clue member 6 and the state in the orthogonal direction can be selected.

  Of the cutout holes 8a and 8b, the cutout hole 8a is in the lower position, the cutout hole 8b is in the lateral position, and the bracket 8 is provided with a shaft 31. With 33, the base part of the handrail upper rail 9 is pivotally attached so as to be rotatable and movable. The pin 30 is biased by a spring 32 so as to be drawn toward the shaft 31.

  When the handrail upper rail 9 is parallel to the clue member 6, the pin 30 is fitted into the notch hole 8a at the lower position and fixed.

  From this state, the pin 30 is removed from the notch hole 8a against the spring 32, and the handrail upper rail 9 is rotated as it is about the shaft 31 until it becomes horizontal, and the pin 30 is fitted into the notch hole 8b. The pin 30 is not pulled out from the notch 8b by being pulled by the spring 32, and the handrail upper rail 9 is fixed in a horizontal state. To fold the handrail upper rail 9 again, the reverse operation may be performed. The base portion of the handrail upper rail 9 can move laterally with a long hole 33 with respect to the shaft 31 and the pin 30 can be removed from the notch hole 8b.

  As another example of the bracket 8, the mechanism shown in FIGS. 6 to 15 can be used.

  The first metal fitting 115 fixed to the handrail upper rail 9 and the second metal fitting 116 fixed to the clasp member 6 are configured, and the first metal fitting 115 and the second metal fitting 115 are arranged with the first metal fitting 115 inside. The end of the metal fitting 116 was pivotally attached by a pin 117.

  The first metal fitting 115 is formed by extending one opposing piece 118a of the U-shaped main body portion downward, and fixing the handrail upper bar 9 with a screw to the extended portion. In between, the lock pin 120 urged by the spring 119 is slidably attached so that the tip protrudes outside the piece 118a. In the drawing, reference numeral 135 denotes a notch formed in a piece connecting the opposing pieces 118a and 118b, and is for securing a gap into which a tip of a locking claw 128 described later is inserted.

  The second metal fitting 116 is obtained by extending one opposing piece 121a of the U-shaped main body portion downward and fixing the clasp member 6 with a screw to the extended portion. A lock hole 122 into which the pin 120 is inserted is formed, and a taper-shaped projecting piece that is inclined outwardly with a pressing portion 123 that presses the lock pin 120 against the elasticity of the spring 119 in the immersion direction at the upper end. Formed with.

  Further, the other end of the lock pin 120 protrudes to the outside of the piece 118b, and a release lever 124 for unlocking is fixed to the protruding portion in a direction orthogonal to the lock pin 120, and the lock pin 120 is fixed to the outside of the piece 118b. A release cam 125 engaged with the release lever 124 is fixed so as to surround the protruding portion 120. The cam 125 has a cylindrical surface with a tapered surface 125 a, and the base end of the release lever 124 moves on the tapered surface 125 a so that the lock pin 120 protrudes and retracts from the lock hole 122. Move in the direction.

  A spring receiver 126 is attached in the middle of the central position of the lock pin 120, and an operating pin 127 is provided outside the spring receiver 126 so as to be orthogonal to the lock pin 120, and the operating pin 127 is attached to the second metal fitting 116. A locking claw 128 that engages and returns the lock pin 120 to the protruding position is provided. The locking claw 128 is formed as a tapered piece inclined inward on the upper part of the piece 121c that joins the pieces 121a and 121b of the second metal fitting 116.

  First, after the clue member 6 is turned up and started up, the handrail upper rail 9 that is suspended so as to follow it is turned and opened horizontally. As shown, when the tip of the lock pin 120 enters the inside of the pressing portion 123 formed on the second metal fitting 116 and the handrail upper rail 9 is further rotated, the lock pin 120 is pushed further inward by the pressing portion 123. The tip of the second metal fitting 116 enters the inside of the piece 121a.

  Further, when the handrail upper bar 9 is rotated so that the handrail upper bar 9 becomes completely horizontal, the lock pin 120 matches the position of the lock hole 122, and the elasticity of the spring 119 causes the tip of the lock pin 120 to move. The first metal fitting 115 and the second metal fitting 116 are fixed to each other by inserting the lock pin 120 into the lock hole 122 and the lock pin 120 engaging the lock hole 122. Fixed in state. In this state, the release lever 124 is engaged with the low position of the tapered surface 125 a of the cam 125.

  To fold the handrail upper rail 9 and the clue member 6 after use, the operation may be reversed to the case of opening, but the handrail upper rail 9 is shown in FIGS. 11 and 12 from the state shown in FIG. Thus, the release lever 124 is rotated to the left in the drawing. As a result, as shown in FIG. 12, the release lever 124 is positioned at the highest portion of the tapered surface 125 a of the cam 125, and the tip of the lock pin 120 comes out of the lock hole 122. Therefore, if the first metal fitting 115 and the second metal fitting 116 are rotated in the opening direction in this state, the tip of the lock pin 120 moves along the inside of the piece 121a of the second metal fitting 116, and the clue member 6 and the handrail upper bar 9 are closed to be parallel and flat.

  In the middle of the process of rotating the first metal fitting 115 and the second metal fitting 116 in the opening direction, the tip of the operating pin 127 abuts below the locking claw 128 as shown in FIGS. On the other hand, by rotating the first metal fitting 115 and the second metal fitting 116, the operating pin 127 is pushed by the locking claw 128 and turns (turns counterclockwise in the figure). As a result, the lock pin 120 integral with the operating pin 127 rotates, and then the tip of the lock pin 120 protrudes from the lock hole 122 by the elasticity of the spring 119, and is restored to prepare for the next opening leg.

  Further, when the handrail upper rail 9 is to be opened in a state where the lock pin 120 does not protrude from the lock hole 122, the lower end portion of the operating pin 127 is engaged with the locking claw 128 as shown in FIG. The first pin 115 and the second bracket 116 are rotated against the front end of the first pin 115 and the operating pin 127 is pushed by the locking claw 128 to rotate (turn clockwise in the figure). As a result, the lock pin 120 integral with the operating pin 127 rotates, and then the tip of the lock pin 120 protrudes from the lock hole 122 and is locked by the elasticity of the spring 119.

  As shown in FIG. 1, when the clue member 6 is raised and the handrail upper bar 9 is held horizontally, the ends of the handrail upper bar 9 come close to each other and collide with each other. Therefore, it is preferable that the handrail upper bar 9 has a length of about one half of the length of the top plate 3 in the length direction for balance.

  Further, a connecting member to the handrail upper bar 9 at the opposite position can be provided at the tip of each handrail upper bar 9. Although not shown in the figure, various types such as a bracket-shaped member, a hook-shaped member, and a pin-shaped member are conceivable.

  As the material of the handrail upper rail 9, aluminum alloy, steel, resin, etc. can be adopted in addition to aluminum, and the shape can be any of square tube, round (including ellipse) tube, round (including ellipse) bar, etc. It may be any shape that is lightweight and does not interfere with folding.

  Next, the usage will be described. FIG. 1 shows a state in which the portable work table 1 is used, in which the main leg 4 is opened, a clue member 6 is erected, and a handrail upper rail 9 extends from the tip of the clue member 6 along the longitudinal direction of the top plate 3. It protrudes horizontally at the upper part of the side, and the ends of the opposed handrail upper rails 9 are connected to each other and are erected on both ends of the top plate 3 so as to be stretched between the opposite clue members 6, 6. Yes.

  Therefore, the worker who goes up the main leg 4 and reaches the vicinity of the top plate 3 reaches the top plate 3 while grasping the clue member 6 and ensuring safety. Since the handrail upper rail 9 is provided on the open surface on the side of the top plate 3, accidents such as accidental falling from the side of the top plate 3 during operation or the like are prevented.

  In order to fold the portable workbench 1 when not in use, first, as shown in FIG. 2, the connection of the opposed upper rails 9 of the handrail is released, and the upper rails 9 are connected to the handrail upper members 9 via the brackets 8. 6 is rotated downward in a vertical direction so as to be parallel to 6, and is folded flat with respect to the clue member 6.

  Further, as shown in FIG. 3, the clasp member 6 in which the handrail upper rail 9 is folded and integrated is rotated downward with respect to the main leg 4 in the vertical direction, and becomes flat with the main leg 4. Then fold it up.

  In this state, as shown in FIG. 4, in the state in which the handrail upper rail 9, the clasp member 6 and the main leg 4 are integrally folded flat, the stay 7 is released and the main leg 4 is moved to the top plate. 3 is folded so as to be parallel to the top plate 3. In this state, the entire portable workbench 1 is folded flat, so that only a small space for transportation and storage is sufficient.

  The state in which the clue member 6 and the handrail upper rail 7 shown in FIG. 2 and FIG. 3 are folded is used when the plurality of portable worktables 1 are connected and used as a large stage. It is possible to cope with the case where the member protruding upward is eliminated.

It is a front view of the use condition which shows embodiment of the portable worktable of this invention. It is a front view of the state which folded the handrail upper rail which shows embodiment of the portable worktable of this invention. It is a front view of the state which folded the handrail upper crosspiece and the clue member which show embodiment of the portable worktable of this invention. It is a front view of the state which folded up the whole embodiment of the portable worktable of the present invention flatly. It is a perspective view which shows the 1st example of the connection metal fitting used for the portable worktable of this invention. FIG. 6 is a front view of the second example of the connection fitting used in the portable worktable of the present invention in an open state. FIG. 5 is a plan view of a second example of the connection fitting used in the portable worktable of the present invention in a closed state. FIG. 6 is a front view of the second embodiment of the connection fitting used in the portable worktable of the present invention in the middle of closing. It is the sectional view on the AA line of FIG. FIG. 5 is a front view of a second example of the connection fitting used in the portable worktable of the present invention in a closed state. FIG. 6 is a front view of a second example of the connection bracket used in the portable worktable of the present invention in a closed and unlocked state. It is CC sectional view taken on the line of FIG. FIG. 5 is a longitudinal front view of the second example connecting bracket used in the portable worktable of the present invention in the middle of closing. FIG. 5 is a cross-sectional plan view of the second example of the connecting bracket used in the portable work table of the present invention in the middle of closing. FIG. 6 is a longitudinal front view of the second example of the connecting bracket used in the portable worktable of the present invention in the middle of opening at the locking position. 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 ... Anti-slip hole 3 ... Top plate 4 ... Main leg 5 ... Stepping rail 6 ... Cue member 7 ... Stay 8 ... Bracket 9 ... Handrail upper rail 21 ... Handrail

Claims (3)

In a portable work table in which a top plate is bridged between a pair of ladder-shaped main legs, a clue member is erected at the four corners of the top plate , and at the tip of the clasp member, the length of the top plate is reduced. When it has a half length and protrudes horizontally from the cue member at the opposite position along the longitudinal direction of the top plate, the protruding tip comes close, is abutted and connected, and when the connection is released, It is characterized in that a handrail upper bar that can be folded flatly with respect to the clue member so as to be parallel to the clue member and is pivoted vertically is attached. Portable worktable.   The portable worktable according to claim 1, wherein the clue member is pivotally attached to the upper part of the main leg so as to be folded in parallel with the main leg.   The portable worktable according to claim 1 or 2, wherein the main leg is rotatably attached to both ends of the top plate.

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