JP2009024478A - Portable workbench - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily install a handrail in the longitudinal direction of a top board, easily assemble the top board on an upper part, surely hold the installed state of the top board after the assembly, and enhance safety by preventing a downfall-falling accident from the top board from occurring. <P>SOLUTION: The top board 3 is installed between a pair of ladder-shaped main legs 4. A handrail strut 9 is vertically installed at each of four corners of the top board 3 foldably along the main legs 4. One ends of the handrail styles 10 positioned between the handrail struts 9 along the longitudinal direction of the top board 3 and having the length of approximately 1/2 of the longitudinal length of the top board 3 are freely turnably pivoted on the upper parts of the opposed handrail struts 9, respectively, so that they are abutted against each other. A bar-like connection member 31 projecting toward the other handrail style 10b is installed to be free to appear and disappear on one handrail style 10a. A hollow insertion part allowing the connection member to be inserted therein at the projecting position is formed in the other handrail style 10b. A locking projection is formed at the projecting end part of the connection member. A locking hole to which the locking projection is locked is formed in the side wall of the hollow insertion part of the other handrail style 10b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a portable work table used for a construction work site, interior / exterior work such as a ceiling or wall of a building, electric wiring work, and a handrail member used for the work table.

Such a portable work table 1 is also disclosed in Patent Document 1 below. Conventionally, as shown in FIG. 26, for example, as shown in FIG. 26, a plurality of step bars 5 are attached at appropriate intervals between a pair of support legs 4a. 4, a rectangular top plate 3 is rotatably mounted between a pair of the ladder-shaped main legs 4, and a stay 7 that is bendable between the top plate 3 and the main legs 4 is provided. It is intervening.
Japanese Patent No. 2989166 (Aluminum portable worktable)

  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.

  The clue member 6 serves as a clue when the operator moves up and down on the top plate 3 as a work table or works on the top plate to improve safety and workability. 4 so that it can be folded along 4 so that it can stand upright at the four corners of the top plate 3.

  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. Cannot be achieved completely.

Therefore, as shown in FIG. 27, a U-shaped frame-shaped handrail 21 is separately prepared as means for preventing the fall from the top plate 3 as shown in FIG. Accordingly, a separate erection is provided between the clue members 6.
JP 2001-152659 A (Portable worktable)

  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 top plate 3 from falling or falling.

  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, 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 operator, 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 a space for transportation and storage is required, which is troublesome.

  Incidentally, in the case of Patent Document 2 as well, the handrail 21 is fixed to the top plate 3 by providing a special fixing member at the lower part of the vertical rail extending from the horizontal rail of the handrail. However, in order to improve safety, it is difficult to balance with ease of attachment and detachment, but attachment and removal are troublesome.

  The purpose of the present invention is to eliminate the inconvenience of the conventional example, can easily install a handrail in the longitudinal direction of the top plate, can be easily assembled to the top of the top plate, and can securely hold the installed state after assembly, The purpose of this invention is to provide a portable worktable that can prevent accidents from falling or falling from the top and improve safety.

  According to the first aspect of the present invention, a top plate is bridged between a pair of ladder-shaped main legs, handrail posts are erected at the four corners of the top plate so as to be foldable along the main legs, and in the longitudinal direction of the top plate. Accordingly, one end of a handrail bar, which is located between the handrail posts and has a length of about one-half of the length of the top plate, is pivotally attached to the upper part of the opposite handrail post so as to collide with each other. A bar-like connecting member that protrudes toward the other handrail bar is provided in one handrail bar so that it can protrude and retract, and a hollow insertion part is formed on the other handrail bar to insert the connecting member at the protruding position. Then, the gist is that a locking projection is provided at the protruding end of the connecting member, and a locking hole is formed in the side wall of the hollow insertion portion of the other handrail bar to lock the locking projection.

  According to the first aspect of the present invention, the handrail bars installed along the longitudinal direction of the top plate collide with the handrail struts facing each other and the tips are connected to each other by the connecting members. In this case, the protruding end portion of the connecting member is locked in the locking hole provided in the hollow insertion portion of the other handrail bar, so that the connecting member comes out of the other handrail bar. Is prevented, and the state in which the handrails that collide with each other are connected by the connecting member is reliably maintained.

  The gist of the invention described in claim 2 is that a locking hole is formed in the side wall of the one handrail bar to lock the locking projection at the position where the connecting member is immersed.

  According to the second aspect of the present invention, since the locking hole is provided also on the side of the handrail that is inserted and stored when the connecting member is not used, the connecting member is prevented from protruding when the connecting member is not used.

  The gist of the invention described in claim 3 is that the connecting member is made of a flexible material, the tip portion is formed by the opposing side wall, and the locking projection is formed in a wedge shape on the outer surface of the side wall. It is.

  According to the third aspect of the present invention, since the connecting member is flexible and the locking projection is formed in a wedge shape, the side wall portion of the connecting member can be simply pushed out of the retracted storage state in the protruding direction. The locking projections are bent inwardly to disengage from the locking holes on the storage side, and then bent outward to return to be locked in the locking holes of the other handrail bar and connected to the other handrail bar.

  The gist of the invention described in claim 4 is that a window hole in which the side wall surface of the connecting member is exposed is formed in a side portion of the one and other handrail bars.

  According to the fourth aspect of the present invention, since the outer surface of the side wall of the connecting member is revealed from the window hole provided in the side portion of the handrail bar, it is connected from the window hole of the handrail bar on either the storage side or the connection side. By observing whether or not the member is revealed, it can be determined whether or not the member has been securely connected.

  According to a fifth aspect of the present invention, a top plate is bridged between a pair of ladder-shaped main legs, handrail posts are erected at the four corners of the top plate so as to be foldable along the main legs, and in the longitudinal direction of the top plate. Accordingly, one end of a handrail bar, which is located between the handrail posts and has a length of about one-half of the length of the top plate, is pivotally attached to the upper part of the opposite handrail post so as to collide with each other. A bar-like connecting member that protrudes toward the other handrail bar is provided in one handrail bar so that it can protrude and retract, and a hollow insertion part is formed on the other handrail bar to insert the connecting member at the protruding position. A fixing bracket is detachably attached in the vicinity of the protruding end of the connecting member, and the fixing bracket is detachably attached to one handrail rail, and is attached to and detached from the other handrail rail. Consists of a plate-like body with a connecting projection part to be immersed, and the protrusion for preventing removal is inserted into one handrail bar That the engagement hole is provided, in which the coupling protrusion in the other handrail bars is summarized as providing the locking hole to insert.

  According to the invention described in claim 5, as in the invention described in claim 1, the handrail bars installed along the longitudinal direction of the top plate abut against the handrail struts facing each other and the tips are connected to each other. Connected with In this case, the protruding end portion of the connecting member is locked in the locking hole provided in the hollow insertion portion of the other handrail bar, so that the connecting member comes out of the other handrail bar. Is prevented, and the state in which the handrails that collide with each other are connected by the connecting member is reliably maintained.

  Further, when the connecting member is not used, the protrusion for preventing removal provided on the connecting member is inserted into the locking hole formed in one handrail bar, and the connecting member is placed in one handrail bar. It is fixed and stored without falling out.

  When the connecting member is stored and used, the fixing bracket is provided with a protrusion for preventing the connection with one handrail and a protrusion for connecting with the other handrail. This can be done without attaching a large amount of processing to the connecting member itself, simply by attaching the fixing bracket.

  The gist of the invention described in claim 6 is that the protrusion for preventing removal formed on the fixing member of the plate-like body and the connecting protrusion are urged in the protrusion direction by the elasticity of the spring. Is.

  According to the sixth aspect of the present invention, since the fixing bracket protrudes into the locking hole by the elasticity of the spring attached thereto, it can be easily and reliably fixed to the storage position and the connecting position simply by sliding the connecting member. .

  The gist of the invention according to claim 7 is that the connecting protrusion is formed by bending a plate-like body into a tooth shape of a ratchet.

  According to the seventh aspect of the present invention, the connecting protrusion can be easily manufactured by bending, and the structure is also simple.

  As described above, the portable worktable of the present invention can easily install a handrail in the longitudinal direction of the top plate, and the assembly to the top of the top plate also rotates the handrail support column and the handrail bar, and slides the connecting member. It is easy to assemble with just one touch, and after assembly, the handrails are securely connected by connecting members to maintain the installation state, and it is possible to reliably prevent accidents from falling or falling from the top plate and improving safety. It can be done.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing a first 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 conventional example shown in FIGS. Since these 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 the conventional structure, 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 pivotably mounted between a pair of 4 so that the main leg 4 can be folded along the back side of the top plate, and can be bent halfway between the top plate 3 and the main leg 4. The stay 7 is installed. Both ends of the stay 7 are pivotally attached to the tread bar 5 and the top plate 3 of the main leg 4, respectively. After the work is completed, the stay 7 is bent at the bent portion so that the portable worktable 1 can be folded and moved. It has become.

  Further, the bar-like clasp member 6 is erected from the main leg 4 by the attachment piece 22 so as to be positioned at the four corners of the top board 3, that is, at the elevators between the main leg 4 and the top board 3. These main legs 4, top plate 3 and clue member 6 are made of aluminum. When the top plate 3 is shown in FIG. 12, burring holes 3a for preventing slipping are scattered, and a plate 3b for preventing stepping off is attached to the left and right wives.

  The clue member 6 serves as a clue when an operator moves up and down on the top plate 3 as a workbench, or works on the top plate, and improves safety and workability. The main leg 4 extending from the corner of the top plate 3 or the corner of the top plate 3 can be folded along the longitudinal member of the main leg 4 extending from the corner of the top plate 3 from the standing position. It is attached to.

  The standing and folding mechanism of the clue member 6 will be described in detail. As shown in FIG. 19 in detail, the groove portion 23 of the attachment piece 22 of the clasp member 6 fixed to the upper portion of the main leg 4 extending from the even angle portion of the top plate 3. The clue member 6 is attached to the first pin member 24 so that both of the clasp members 6 are pivotally mounted. The through hole 25 of the clasp member 6 through which the first pin member 24 is inserted is formed by the first pin member 24. It is formed in a slot shape so that it can move.

  A second pin member 26 that is inserted through the clue member 6 is provided at a position away from the first pin member 24, and the first pin member 24 and the second pin member 26 that are located inside the clue member 6 are provided. The protrusion 28 of the second pin member 26 that is connected by the spring 27 and protrudes from the clue member 6 has the force of the spring 27 applied to the notches 29 and 29 formed in the upper part of the mounting piece 22 as shown in FIG. Thus, the clue member 6 is brought to a position erected on the corner of the top plate 3. In this case, the first pin member 24 is located at the upper end of the slot-like through hole 25.

  In order to fold the clue member 6, as shown in FIG. 20, the clasp member 6 is pulled upward (in the direction of the arrow X) against the force of the spring 27, and rotated downward from the standing position A to be folded. When brought to the position B, the clue member 6 is moved upward (in the direction of arrow Y) by the action of the spring 27, and the protruding portion 28 of the second pin member 26 is formed at the lower portion of the mounting piece 22, As a result, the clue member 6 is folded along the side surface of the main leg 4. In this case, the first pin member 24 is located at the lower end of the slot-like through hole 25.

  The handrail member 8 of the present invention is composed of a handrail column 9 made of a sheath tube that covers the clue member 6, and the handhold member 10 in a standing state and a handrail bar 10 that spans between the handrail columns 9.

  As shown in FIG. 11, the clue member 6 is an aluminum alloy extruded alloy tube having a substantially rectangular cross section, and a handrail column 9 made of a sheath tube that is detachably covered on the clue member 6 is in close contact with the outside of the clue member 6. A tubular body having a peripheral surface.

  The handrail support 9 that covers the clue member 6 is fixed to the clasp member 6 by a bolt 11 that penetrates both.

  The handrail bar 10 parallel to the longitudinal direction of the top plate 3 with respect to such a handrail support column 9 is a divided body, and the single body is about half the length of the top plate 3 in the length direction. The one is pivotally attached to the upper part of the handrail support 9 by a pin so that it can be folded along the handrail support 9.

  When the handrail bar 10 as the divided body is erected, the handrail bar 10 extends horizontally from the front end of the handrail column 9 along the longitudinal direction of the top plate 3 when the clue member 6 and the handrail column 9 are erected. The handrail bar 10b that protrudes to the opposite side and that opposes one handrail bar 10a is abutted at the tip and connected by the connecting member 31 (see FIGS. 13 to 18).

  The interconnecting portion at the protruding tip of the handrail bar 10 is provided with a bar-like connecting member 31 projecting toward the other handrail bar 10b on one handrail bar 10a so as to be able to protrude and retract, and the other handrail bar 10b that collides with the above-mentioned A hollow insertion portion 35 into which the connecting member 31 is inserted is formed (see FIG. 13), and the hollow insertion portion 35 uses a tubular body made of an aluminum extruded alloy that forms the handrail 10b or a molded product made of a synthetic resin such as plastic. To do.

  The connecting member 31 is produced by molding a synthetic resin. As shown in the perspective view of FIG. 14 as the first embodiment, the connecting member 31 is formed in an elongated U-shape with the elongated plate-like side wall portions 31a and 31b facing each other. A reinforcing rib 31c is provided between the opposing side wall portions 31a and 31b.

  The rib 31c is not provided in the vicinity of the elongate U-shaped tip part, and a gap is formed between the opposing side wall parts 31a and 31b. The opposing side wall parts 31a and 31b are mutually connected by the flexibility of the synthetic resin. It is configured to bend inward. Also, the tip portions of the opposing side wall portions 31a and 31b may be formed in advance so that the distance between them is slightly narrowed.

  And the latching protrusion 33 latched by the latching holes 32a and 32b each formed in the side wall part of the handrail 10a, 10b was protrudingly provided in the outer side of the front-end | tip part of one side wall part 31a. The locking projection 33 is formed in a wedge shape that narrows toward the tip, and a hook portion 33a is provided at the base end.

  A knob 12 for sliding the connecting member 31 is attached to the outside of the base end of the other side wall 31b. This knob 12 is also made of synthetic resin and is fixed at the insertion position by frictional resistance only by being inserted into the mounting hole formed in the connecting member 31.

  In the figure, reference numeral 13 denotes a long hole for allowing the knob 12 to move.

  Further, in the figure, 34a and 34b are display windows formed on the surface side of the handrail bars 10a and 10b, respectively, and the surfaces of the side wall portions 31a and 31b of the connecting member 31 are positions where the connecting member 31 is housed in the handrail bar 10a. Or it formed in the position respectively revealed in the position connected with the handrail 10b.

  The handrail bar 10 is a handrail bar for the longitudinal direction extending in the length direction of the top plate. This alone is sufficient, but it is also possible to dispose the handrail rail in the width direction of the top plate.

  The handrail bar 14 for the short direction disposed also in the width direction of the top plate can be housed inside the handrail bar 10 as a sheath tube, and one end is pivotally attached to the handrail bar 10b for the longitudinal direction. It is hung on the opposite handrail bar 10a in the longitudinal direction.

  FIG. 13 shows each member. A bolt hole 15a for penetrating the bolt 11 and a bolt hole 15b for pivotally mounting the handrail bar 10 are provided in the handrail column 9, and a handrail bar 14 for the short direction is provided on the side surface of one handrail bar 10b. A window hole 16 is formed for accommodation, and an opening 17 into which the front end of the handrail bar 14 for the short direction is inserted is formed on the side surface of the other handrail bar 10a.

  If the handrail support 9, the handrail bar 10, the handrail bar 14 for the short-side direction, and the connecting member 31 constituting the handrail member 8 are formed with a square pipe made of synthetic resin, the weight becomes light. In addition to the synthetic resin, a metal such as an aluminum alloy may be used as long as the shape does not hinder folding. In this case, the handrail bar 10 and the connecting member 31 may be colored in different colors.

  In this way, the handrail bar 14 for the short-side direction has an end portion on the opposite side to the end portion pivotally attached to the handrail bar 10b for the longitudinal direction in the opening 17 on the side surface of the opposite handrail rail 10a for the longitudinal direction. The insertion is completed by inserting it into.

  Next, the usage will be described. As shown in FIG. 3, the handrail bar 14 for the short direction is housed in the handrail bar 10 b, the handrail bars 10 a and 10 b are folded along the handrail column 9, and the handrail column 9 together with the clue member 6 is the top plate 3. It is folded along the vertical member of the main leg 4 extending from the corner portion of the main leg 4.

  As shown in FIG. 16, the connecting member 31 is also accommodated in the hollow interior of one handrail 10a. In this state, the knob 12 protrudes from the long hole 13, the hook portion 33a of the locking projection 33 is locked to the opening edge of the locking hole 32a, and the connecting member 31 is fixed at the storage position.

  Further, by revealing the locking projection 33 from the locking hole 32a, it can be confirmed that the connecting member 31 is also housed in the handrail bar 10a from the top plate 3 inside the handrail bar 10.

  Further, the tip end portion of the side wall portion 31a of the connecting member 31 is revealed in the display window 34a formed on the handrail bar 10a, so that the connecting member 31 is at a predetermined storage position of the handrail bar 10a from the outside of the handrail bar 10. Can also be confirmed. In this case, since the connecting member 31 and the handrail 10 are formed in different colors, they can be easily observed even if the area revealed from the locking hole 32a and the display window 34a is small.

  In order to use the portable worktable 1, the main leg 4 is opened and installed.

  As shown in FIGS. 4 and 5, the clue member 6 is erected and a handrail column 9 is erected along with it, and in this state, the handrail bar 10 for the longitudinal direction is folded along the handrail column 9. Stands with 9

  When only the clasp member 6 is used as in the conventional portable workbench without the handrail member 8, if both the clasp member 6 and the handrail support column 9 are grasped together and moved up and down from the main leg 4 to the top plate 3, Good.

  As shown in FIG. 6, the handrail bars 10 a and 10 b folded along the handrail support column 9 are rotated from the state of FIG. 5 so as to project horizontally at the upper side portion along the longitudinal direction of the top plate 3. In this state, as shown in FIG. 16, the connecting member 31 is accommodated in the handrail 10a on the side where the long hole 13 is formed, and the engaging protrusion 33 is connected to the connecting member 31 from the engaging hole 32a as described above. The tip end portion of the side wall portion 31b is visible from the display window 34a.

  As shown in FIG. 7, since the tip of the handrail post 10b from the handrail post 9 facing the handrail post 10a from one handrail post 9 collides, the connecting member 31 is slid from the handrail 10a by the knob 12. It protrudes in the direction of the other handrail 10b and is inserted into the hollow insertion portion 35 and connected.

  At this time, since the connecting member 31 is formed to be bent by a synthetic resin or the like, a force in the forward direction is applied to the locking protrusion 33 at the tip, whereby the wedge-shaped inclined portion is moved by the edge of the locking hole 32a. 10a is pushed into the hollow interior, and the connecting member 31 smoothly slides forward.

  Then, in a state where the connecting member 31 is inserted into the hollow insertion portion 35 of the other handrail bar 10b, the locking protrusion 33 enters the locking hole 32b by the bending force of the handrail bar 10b as shown in FIGS. The hook portion 33a is hooked on the edge of the locking hole 32b and is locked here. Thereby, the front-end | tip part of the connection member 31 is fixed to the other handrail bar 10b, and the connection state of the handrail bars 10a and 10b is maintained.

  Further, the tip of the side wall 31b of the connecting member 31 is revealed from the display window 34b, and it is easily confirmed that the connecting member 31 has reached the connecting position also from the outside of the top plate 3 that is operated with the knob 12. it can.

  As shown in FIGS. 8 and 9, the handrail bars 10 a and 10 b are arranged in the longitudinal direction above the peripheral edge of the top plate 3, and then the handrail for the short direction stored in the handrail bar 10. The rail 14 is pulled out while being rotated, and the leading end thereof is inserted into the opening 17 of the opposed railing rail 10, and the rail rail 14 for the short direction is hung between the railing rails 10 as shown in FIG.

  Thereby, the handrail bars 14 for the short direction are arranged in the width direction above the peripheral edge of the top plate 3, and the handrail bars 10, 10 and the handrail rails 14 for the short direction are disposed above the peripheral edge of the top plate 3. Can be enclosed in

  To fold the handrail member 8 after use, the reverse operation may be performed. To return the connecting member 31 to the storage position of the handrail bar 10a, the locking projection 33 protruding from the locking hole 32b is hollow. If the finger is pushed in the direction in the insertion portion 35, the side wall portion 31a is bent and enters the hollow insertion portion 35, and the locking with the locking hole 32b is released. At this time, if the connecting member 31 is further advanced in the direction of the handrail 10b, the hook portion 33a is easily detached from the locking hole 32b.

  Therefore, it is only necessary to hold the knob 12 in this state and slide the connecting member 31 in the direction of the handrail 10a.

  FIGS. 21-25 shows 2nd Embodiment of the connection structure of the handrail 10a, 10b by a connection member. In the first embodiment, the locking protrusion 33 formed on the connecting member 31 is locked to the locking holes 32a and 32b respectively formed on the handrail bars 10a and 10b, thereby fixing the connecting member 31 to one handrail bar 10a. In the second embodiment, the connecting member itself is provided with a protruding portion that is fixed to the storage position and the connection position. Instead, a fixing metal fitting 36 having these protruding portions was separately provided, and the fixing metal fitting 36 was inserted into the connecting member 31.

  As shown in the exploded perspective view of FIG. 21, the fixing bracket 36 is manufactured by bending a flat plate-like body, and the plate-like body is bent into a plane substantially crank shape. In FIG. The right side bent portion is bent at an acute angle with respect to the 90-degree L-shaped bent portion, and the leading end enters the inside of the connecting member 31. In this way, an oblique piece is formed so that an acute corner is formed in a ratchet tooth shape, and a protrusion 37 for preventing removal from the handrail bar 10a is provided on the lower surface of the left L-shaped protruding piece.

  The ratchet-shaped bent portion of the ratchet serves as a connection protrusion 38 for connection to the other handrail bar 10b, and the engagement is only in one direction, which is the direction in which the other handrail bar 10b is connected to one handrail bar 10a. It becomes a stop.

  In FIG. 21, which is connected to the connecting protrusion 38, a side wall 39 is raised from both sides of the right protrusion piece 38 a, and an insertion hole 40 for a fixing pin 42 described later is formed in the side wall 39.

  In the figure, reference numeral 41 denotes a coil spring wound around the fixing pin 42 and disposed in the space between the side walls 39, 39 to press the protruding piece 38a outward.

  The fixing bracket 36 is inserted into the hollow portion at a position in the vicinity of the distal end portion of the connecting member 31, and is mounted rotatably with a fixing pin 42. Then, as shown in FIG. 22, on the side of the connecting member 31, a rectangular hole-shaped insertion hole 43 into which the connecting protrusion 38 can be freely inserted and retracted, and a round hole-shaped insertion into which the protrusion 37 for preventing removal is inserted. Hole 45 is formed.

  Further, as shown in FIGS. 22 to 24, a round hole-shaped locking hole 46 into which the protrusion 37 slides and is inserted is formed in the handrail bar 10a on the side where the connecting member 31 is stored when not in use, and the handrail bar 10a. The other handrail bar 10b is formed with a square hole-shaped locking hole 44 into which the connecting protrusion 38 slides and is inserted when 10b is connected.

  Next, a method of connecting the handrail bars 10a and 10b with the connecting member 31 will be described. When the connecting member 31 is not used, it is in the storage position inside the hollow of the handrail 10a as shown in FIG. In this state, the fixing bracket 36 is pressed outward by the elasticity of the coil spring 41, and the connecting protrusion 38 is inserted into the insertion hole 43 and protrudes outward therefrom. Therefore, in the state where the connecting member 31 is pushed into the handrail bar 10a, the connecting protrusion 38 is brought into contact with the tip of the handrail bar 10a, thereby preventing further pushing.

  At this position, the protrusion 37 for preventing the slippage is inserted into the insertion hole 45 and the locking hole 46, and the connecting member 31 is held in the storage position with respect to the handrail 10a. In this state, the distal end portion of the connecting member 31 protrudes from the handrail bar 10a.

  In order to connect the other handrail bar 10b to the handrail bar 10a in this state, the protruding portion from the handrail bar 10a of the connecting member 31 is inserted into the hollow inside of the other handrail bar 10b, and the finger is inserted into the locking hole 46. The protrusion 37 is pushed against the elasticity of the coil spring 41 to release the prevention of the pull-out.

  In the state where the removal prevention is canceled, the other handrail bar 10b is already connected to the handrail bar 10a via the connecting member 31, so that the other handrail bar 10a is connected to the other handrail bar 10a. The connection position of the crosspiece 10b can be positioned, and the slide of the connection member 31 in the next operation can proceed smoothly.

  If the knob 12 is picked from this state and slid in the direction of the handrail 10b, the connecting member 31 further enters the hollow interior of the handrail 10b. At this time, as shown in FIG. 23, the connecting protrusion 38 and the protruding piece 38a of the fixing bracket 36 are pressed against the inner wall of the handrail bar 10b against the elasticity of the coil spring 41 and are immersed in the handrail bar 10b.

  When the connecting member 31 slides and the insertion hole 43 matches the position of the locking hole 44 as shown in FIG. 24, the connecting protrusion 38 slides into the locking hole 44 due to the elasticity of the coil spring 41, and the connecting member 31. Is fixed to this connection position with respect to the handrail 10b.

  To release the connecting member 31 from the connected state and release the connection, the connecting protrusion 28 inserted in the locking hole 44 is pushed inward with a finger to release the fixing to the handrail 10b, and the knob 12 is picked. When the connecting member 31 is slid in the direction of the handrail 10a, the connecting member 31 moves into the handrail 10a while being pushed into the handrail 10a, 10b.

  When the projection 37 reaches the position of the locking hole 46 formed in the handrail bar 10a by the movement of the connecting member 31, the protrusion 37 is immersed in the locking hole 46 by the elastic force of the coil spring 41, and the connecting member 31a becomes the handrail bar. It is fixed at a predetermined storage position in 10a. Therefore, the connecting member 31 does not move from this position and come out of the handrail 10a.

It is a front view after the assembly which shows 1st Embodiment of the portable worktable of this invention. It is a side view after the assembly which shows 1st Embodiment of the portable worktable of this invention. It is a front view which shows the 1st step among the assembly procedures which show 1st Embodiment of the portable worktable of this invention. It is a front view which shows a 2nd step among the assembly procedures which show 1st Embodiment of the portable worktable of this invention. It is a front view which shows a 3rd step among the assembly procedures which show 1st Embodiment of the portable worktable of this invention. It is a front view which shows a 4th step among the assembly procedures which show 1st Embodiment of the portable worktable of this invention. It is a front view which shows a 5th step among the assembly procedures which show 1st Embodiment of the portable worktable of this invention. It is a side view which shows a 5th step among the assembly procedures which show 1st Embodiment of the portable worktable of this invention. It is a top view which shows a 5th step among the assembly procedures which show 1st Embodiment of the portable worktable of this invention. It is a top view which shows a 6th step among the assembly procedures which show 1st Embodiment of the portable worktable of this invention. It is a cross-sectional top view of a clasp member and the handrail support | pillar which covers this. It is a top view of a top plate. It is a perspective view of the structural member of a handrail member. It is a perspective view which shows the connection member of 1st Embodiment. It is a top view which shows the connection member of 1st Embodiment. It is a cross-sectional top view of the state which accommodated the connection member of 1st Embodiment in the handrail. It is a cross-sectional top view of the state which connected the handrail rail with the connection member of 1st Embodiment. It is a front view of the state which connected the handrail rail with the connecting member of a 1st embodiment. It is the perspective view which notched a part which shows the coupling mechanism of a clue member and an attachment piece. It is a partial front view which shows the standing and folding mechanism of a clue member. It is a disassembled perspective view of the connection member of 2nd Embodiment. It is a cross-sectional top view in the state where the connection member of a 2nd embodiment was fixed to the storing position. It is a cross-sectional top view of the state in the middle of the connection member of 2nd Embodiment sliding to the other handrail bar. It is a cross-sectional top view in the state where the connection member of a 2nd embodiment was fixed to the connection position. It is a vertical front view of the state where the connecting member of a 2nd embodiment was fixed to the connecting 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 3 ... Top plate 3a ... Burring hole 3b ... Plate 4 ... Main leg 4a ... Post leg 5 ... Footing rail 6 ... Cue member 7 ... Stay 8 ... Handrail member 9 ... Handrail post 10, 10a, 10b ... Handrail rail 11 ... Bolt 12 ... Pick 13 ... Long hole 14 ... Hand rail rail for short direction 15a, 15b ... Bolt hole 16 ... Window hole 17 ... Opening 21 ... Handrail 22 ... Mounting piece 23 ... Groove portion 24 ... First pin member 25 ... Through hole 26 ... Second pin member 27 ... Spring 28 ... Protruding part 29, 30 ... Notch part 31 ... Connecting member 31a, 31b ... Side wall part 31c ... Rib 32a, 32b ... Locking hole 33 ... Locking protrusion 33a ... Hook part 34a, 34b ... Display window 35 ... Hollow insertion part 36 ... Fixing bracket 37 ... Protrusion 38 ... Connecting projection part 38a ... Projection piece 39 ... Side wall 40 ... Insertion hole 41 ... Coil spring 42 ... Fixing pin 43 ... In hole 44 ... locking hole 45 ... insertion hole 46 ... locking hole

Claims (7)

  A top plate is bridged between a pair of ladder-shaped main legs, handrail posts are erected at the four corners of the top plate so as to be foldable along the main legs, and are positioned between the handrail posts along the longitudinal direction of the top plate. One end of a handrail bar having a length of about one-half of the length of the top plate is pivotally attached to the upper part of the opposite handrail strut so as to collide with each other. A bar-shaped connecting member that protrudes toward the other handrail bar is provided on the handrail bar so that it can be moved in and out, and a hollow insertion portion is formed on the other handrail bar to insert the connecting member at the protruding position. A portable worktable characterized in that a locking projection is formed on the side, and a locking hole for locking the locking projection is formed on the side wall of the hollow insertion portion of the other handrail.   The portable worktable according to claim 1, wherein a locking hole for locking a locking projection at a position where the connecting member is inserted is formed in a side wall of the one handrail bar.   The portable worktable according to claim 1 or 2, wherein the connecting member is made of a flexible material, and has a distal end portion formed by opposing side walls, and the locking protrusion is formed in a wedge shape on the outer surface of the side wall. .   The portable worktable in any one of Claims 1-3 which formed the window hole which the side wall surface of a connection member reveals in the side part of the said one and other handrail rail.   A top plate is bridged between a pair of ladder-shaped main legs, handrail posts are erected at the four corners of the top plate so as to be foldable along the main legs, and are positioned between the handrail posts along the longitudinal direction of the top plate. One end of a handrail bar having a length of about one-half of the length of the top plate is pivotally attached to the upper part of the opposite handrail strut so as to collide with each other. A bar-shaped connecting member that protrudes toward the other handrail bar is provided on the handrail bar so that it can be moved in and out, and a hollow insertion portion is formed on the other handrail bar to insert the connecting member at the protruding position. A fixing bracket is mounted in the vicinity so that it can be moved in and out, and this fixing bracket is formed with a protrusion for preventing it from detachably engaging with one handrail, and a connecting protrusion that detachably engages with the other handrail. A locking hole into which one of the handrail bars is inserted, and the other is provided with a locking hole. Portable workbench which the coupling protrusion handrail crosspiece is characterized in that a locking hole to be inserted.   6. The portable workbench according to claim 5, wherein the removal preventing protrusion and the connecting protrusion formed on the plate-shaped fixing bracket are biased in the protrusion direction by the elasticity of a spring.   The said connection protrusion part is a portable worktable of Claim 5 or Claim 6 formed by bending a plate-shaped body in the tooth shape of a ratchet.

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