JP5935984B2 - Portable worktable - Google Patents

Description

  The present invention relates to a portable work table used when working at a relatively high place in a construction site or the like.

  Conventionally, when working at a relatively high place such as the ceiling or the back of a ceiling at a construction site, etc., the work floor is extended downward from the substantially rectangular plate-like work floor and a pair of short sides of the work floor. It is known to use a portable worktable having a ladder-like leg that can support a floor at a predetermined height. Some portable worktables are provided with a clue bar extending upward from the vicinity of the four corners of the work floor to improve safety when raising and lowering between the work floor and the legs. Furthermore, an end detection bar is provided so as to be bridged between the upper ends of a pair of clue bars provided corresponding to both ends of each short side portion of the work floor. There is a technique in which it is possible to recognize that it is located in the vicinity of the end portion of the work floor by contacting the part detection bar (see, for example, Patent Document 1).

JP 2011-169069 A

  However, in order to use the end detection bar disclosed in the above-mentioned Patent Document 1, it is necessary to cross the end detection bar from one of the pair of clue bars to the other, When raising and lowering between them, it is necessary to release the horizontal state of the end detection bar. Accordingly, it becomes difficult to smoothly move up and down between the work floor and the leg portion, and the use of the end detection bar is caused by the troublesomeness of the work or forgetting. There is also a concern that it may cause a situation where it cannot be thoroughly enforced.

  The present invention has been made to solve the above-described problems and the like, and its purpose is to provide a portable worktable that can be smoothly raised and lowered while improving safety. It is in.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

Means 1. A substantially rectangular plate-like work floor;
Ladder-like legs that extend downward from a pair of opposing short sides of the work floor and can support the work floor at a predetermined height position;
In a portable workbench provided with a corner bar of the work floor or a clue bar protruding upward from the vicinity thereof,
The cue stick provided corresponding to at least one of the both ends of each short side portion of the work floor, from the upper end portion thereof, or from the vicinity of the upper end portion, the short side portion of the work floor A notification bar is provided in which one end is supported and the other end protrudes into the air above the work floor,
The notification bar has elasticity in at least a part of the protruding direction, and is pressed against an operator who moves up and down between the work floor and the leg portion, thereby allowing the operator to pass therethrough. A portable worktable characterized by being bent and returning to a state extending along the short side of the original work floor when the worker is separated.

  According to means 1, the upper area of the clue bar provided corresponding to at least one of the two ends of each short side of the work floor, or the upper area of the upper end of the clue bar, An informing bar is provided to project. For this reason, an operator who works on the work floor is positioned near the short side of the work floor, so that a part of the body comes into contact with the notification bar. It can be grasped that it is located in the vicinity of the short side. Therefore, when working on a relatively high place such as the ceiling or the back of the ceiling while moving along the longitudinal direction of the work floor, the work passes through the short side of the work floor without the operator's knowledge. You can avoid situations such as stepping off the floor.

Further, the notification bar has elasticity in at least a part of the protruding direction, and is allowed to allow the worker to pass by being pressed against the worker moving up and down between the work floor and the leg. When the operator is separated, the operator returns to a state extending along the short side portion of the original work floor. For this reason, the operator can push away the notification bar without being forced to perform any special work just by moving up and down between the work floor and the leg as in the case where the notification bar is not provided. You can pass through the short side of the work floor. Furthermore, after the operator passes through the short side of the work floor, the notification bar returns to its original state by its own elastic force, so that the operator can return the notification bar to its original functioning state. There is no need to do. Therefore, it is possible to move up and down between the work floor and the legs relatively smoothly while ensuring safety as described above.

Mean 2. The clue bar protrudes upward from the four corners of the work floor or its vicinity,
The notification bar protrudes from a pair of the clue bars provided corresponding to both ends of each short side of the work floor to the upper area of the work floor, and the pair of clue bars are the work floor The portable workbench according to claim 1, wherein the worktables are spaced apart from each other in a direction along the short side portion.

  According to the means 2, the length of each notification bar can be made as short as possible, and as light as possible. As a result, the function for notifying the operator of the position is lowered due to, for example, the notification bar hanging down, or the notification bar is made too hard to prevent the drooping, and the notification bar is pushed away. The situation where it becomes relatively difficult can be suppressed.

  Means 3. The portable work table according to claim 1 or 2, wherein at least a front end portion in the protruding direction of the notification bar is located closer to a longitudinal center portion side of the work floor than a short side portion of the work floor. .

  According to the means 3, the front of the body is directed to one long side of the work floor, and the work is performed before the operator who is working with the legs wider than the shoulder width is in contact with the notification bar. It is possible to more reliably prevent a situation in which a person's foot dive under the notification bar and step off outward from the short side of the work floor. In addition, since at least a part of the notification bar has elasticity as described above and can be deformed following the notification bar, even if the notification bar is disposed on the inner side of the short side portion of the work floor, An operator who has grasped the short side of the work floor by visually recognizing the work bar can move his / her foot to the vicinity of the short side of the work floor while slightly pushing away the work bar. It can be used as a scaffold up to the vicinity of the short side. Of course, there is no need to manually push the notification bar at this time, and the workability when using the portion near the short side of the work floor as a scaffold is not reduced.

It is a front view of a portable worktable. It is a side view of a portable worktable. It is a perspective view which shows a position alerting | reporting mechanism. It is a disassembled perspective view of a position notification mechanism or the like. It is a perspective view which shows the position alerting | reporting mechanism etc. in another embodiment. It is a perspective view which shows the position alerting | reporting mechanism etc. in another embodiment.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIG. 1 and the like, the portable work table 1 extends downward from a substantially rectangular plate-like work floor 2 and a pair of short side portions 2a opposite to each other. A ladder-like leg portion 3 that can be supported at a predetermined height position and a clue bar 4 that protrudes upward corresponding to the four corners of the work floor 2 are provided. As shown in FIG. 2, the leg portion 3 includes a pair of support columns 6 and a plurality of step bars 7 that are horizontally mounted between the pair of support columns 6. Each leg 3 is rotatably connected to the short side 2a of the work floor 2 and is configured to be foldable to the lower surface side of the work floor 2.

  In the present embodiment, the angle formed between the lower surface of the work floor 2 and the legs 3 is about 100 degrees in the standing state of the portable work table 1. Further, a non-slip tape (not shown) is attached to the upper surface of the stepping bar 7 and the vicinity of both ends in the longitudinal direction of the upper surface of the work floor 2. Further, although not shown, red paint is applied to the vicinity of both ends in the longitudinal direction of the upper surface of the work floor 2 and the lower portion of the leg 3. By these two measures, prevention of inadvertent drop to an operator, alerting, etc. are brought about.

  The clue bar 4 has a substantially square cylindrical shape and is slidably attached to the upper part of the column part 6 of the leg part 3. More specifically, the pair of support columns 6 of each leg 3 is provided with a substantially cylindrical slide locking portion 8 that protrudes outward from the upper side surface (side of the leg 3). At the same time, the clue bar 4 is inserted into the inside of the slide locking portion 8 so that the clue bar 4 is slidable along the extending direction of the column portion 6. Further, the upper and lower portions of the clue bar 4 are each provided with a restriction screw 9 attached so as to protrude outward from the side surface. The clue bar 4 is in contact with the upper restriction screw 9 and the upper side of the slide locking portion 8, the upper end portion of the clasp bar 4 is positioned below the upper end portion of the column portion 6, and the entire column The immersion position extending in parallel with the portion 6, the lower regulating screw 9 and the lower side portion of the slide locking portion 8 are in contact with each other, and most of the clue bar 4 is the upper end portion of the column portion 6, and in turn the work floor 2. It is comprised so that a displacement is possible between the protrusion positions which protrude upwards rather than the upper surface. In the present embodiment, at least the clue bar 4 is configured to be able to be held in the immersion position and the protruding position, respectively. When the clasp bar 4 is extended upward, the lower regulating screw 9 functions as a retaining stopper, and the clasp bar penetrating bolt (not shown) placed on the upper side of the slide locking portion 8 and the nut engaged therewith Thus, the clue bar 4 is held without falling in the slide locking portion 8.

  Now, as shown in FIG. 3 etc., in this embodiment, the position alerting | reporting mechanism 11 is each attached with respect to the upper end part of a pair of clue stick | rod 4 attached to each leg part 3. As shown in FIG. The position notification mechanism 11 includes a substantially rectangular box-shaped connecting portion 12 that opens downward, a mounting plate 13 that is welded and fixed to the upper surface of the connecting portion 12, and a notification bar 14 that is rotatably attached to the mounting plate 13. It has. In the present embodiment, the four position notification mechanisms 11 respectively attached to the four clue bars 4 are the same.

  As shown in FIG. 4, the inner dimension of the connecting portion 12 is configured to be larger than the outer dimension of the upper end portion of the clue bar 4. Furthermore, a pair of side wall portions of the connecting portion 12 are respectively formed with holes penetrating in the thickness direction, and nuts 15 are welded and fixed in accordance with the holes. Then, after the connecting portion 12 is put on the upper end portion of the clasp bar 4, the bolts 16 are screwed to the pair of nuts 15, and the clasp bar 4 is clamped by the pair of bolts 16, thereby the position notification mechanism 11. Is fixedly attached to the clue bar 4.

  The mounting plate 13 includes a protruding portion 18 that protrudes outward from one side of the upper surface of the connecting portion 12, and the position notification mechanism 11 is a clue bar in a direction in which the protruding portion 18 protrudes to the side of the leg portion 3. 4 is attached. Further, the overhanging portion 18 has a substantially U-shape in plan view by forming a notch portion 19 at the center of the side portion on the leading end side in the overhanging direction. A pair of bearings 21 having a substantially cylindrical shape are welded and fixed to the upper surface side of the overhanging portion 18 with the notch portion 19 interposed therebetween. Further, a cylindrical sleeve 22 (see FIG. 4) is rotatably installed inside each bearing 21.

  The notification bar 14 has a substantially quadrangular prism shape, and is entirely made of a rubber material having elasticity. Further, a shaft hole 24 (see FIG. 4) penetrating in the thickness direction is formed on one end portion side of the notification bar 14. The one end side where the shaft hole 24 of the notification bar 14 is formed is positioned between the pair of bearings 21, the sleeve 22 inserted into the pair of shaft holes 24, and the shaft hole 24 of the notification bar 14. On the other hand, a shaft pin 26 having a head on one end side and threaded on the other end side is inserted, and a nut 27 is fixed to the end of the insertion destination of the shaft pin 26. As a result, the sleeve 22 and the shaft pin 26 are attached to the end of the notification bar 14, and the notification bar 14 is pivotally supported by the shaft pin 26 via the sleeve 22.

  As described above, the notification bar 14 has a direction perpendicular to the extending direction of the clue bar 4 and the extending direction of the short side 2a of the work floor 2 with respect to the clue bar 4 in the rotation axis direction. As it is mounted rotatably. In the present embodiment, the notification bar 14 extends substantially horizontally along the short side portion 2a of the work floor 2 from the shaft pin 26 toward the inside of the leg portion 3 (the center side in the lateral width direction of the leg portion 3). It is possible to rotate between a position and a storage position (see a two-dot chain line in FIG. 3) that extends downward from the shaft pin 26 through the notch 19 of the mounting plate 13 and is juxtaposed on the outer surface of the clue bar 4. It is configured. In this embodiment, the pair of sleeves 22 sandwiching the notification bar 14 is fixed to the end of the notification bar 14 by being crimped by the shaft pin 26 and the nut 27. The notification bar 14 may be rotatably supported with respect to the shaft pin 26 by being fixed so as not to rotate with respect to the bearing 21.

  In addition, the notification bar 14 in the functional position has a lower surface supported by the mounting plate 13, and most of the notification bar 14 projects inward of the leg portion 3 from the mounting plate 13 and is located in the upper area of the work floor 2. . In this embodiment, the protrusion length from the mounting plate 13 of the notification bar 14 in the functional position is about 200 mm. Furthermore, the distance between the notification bars 14 that are the functional positions of the pair of position notification mechanisms 11 provided corresponding to the respective short sides 2a of the work floor 2 is about 150 mm. When the side of the body faces the notification bar 14 with a slender worker, even if the thigh of the body hits the notification bar 14 in a level manner, if the interval between the notification bars 14 is 150 mm, be sure to wear clothes. Thus, at least one of the notification bars 14 can be touched and contact with the notification bar 14 can be detected. Further, as described above, the leg portion 3 forms an angle of about 100 degrees with respect to the lower surface of the work floor 2 in the standing state of the portable worktable 1, and the clue bar 4 is formed by the support portion 6 of the leg portion 3. It extends above the work floor 2 along the extending direction. For this reason, the notification bar 14 of the position notification mechanism 11 provided at the upper end portion of the clue bar 4 is located on the center side in the longitudinal direction of the work floor 2 relative to the short side portion 2 a of the work floor 2.

  An operator who works on the work floor 2 of the portable workbench 1 configured as described above is positioned in the vicinity of the short side 2a of the work floor 2 so that a part of his body is attached to the notification bar 14. When the contact is made and the contact is noticed, the work is performed with care not to step on the short side 2a of the work floor 2. Further, since the notification bar 14 has elasticity and is configured to be deformable in a follow-up manner, an operator who finishes the work on the work floor 2 and gets off the work floor 2 displaces the notification bar 14 to the storage position. Without doing so, the notification bar 14 in the functional position is pushed away with the body as it is, passes through the short side 2a of the work floor 2, and descends the leg 3. Furthermore, the operator who has performed the work on the work floor 2 again does not perform the work of displacing the notification bar 14 to the storage position and then returning it to the functional position. 14 is pushed away by the body as it is and goes up to the work floor 2, and the notification bar 14 which is deformed following when the worker passes through the short side part 2 a of the work floor 2 is separated from the worker by his own elastic force. Will return to a stationary state at the functional position.

  In addition, the notification bar 14 resists the operator's pushing-out force by the elastic force that increases in accordance with the amount of bending while bending when contacting the worker. For example, if it is assumed that the notification bar 14 is a bar that hardly bends and the shaft pin 26 has a hinge, a rotational torque as a force against the pushing-out force is generated in the hinge portion. Then, it is desirable that the rotational torque be in the range of 5 Nm to 50 Nm, assuming that the operator's pushing force is applied to the tip of the notification bar 14.

  As described in detail above, according to the present embodiment, the upper ends of the pair of clue bars 4 provided corresponding to both ends of each short side 2a of the work floor 2 are respectively located above the work floor 2. A notification bar 14 protruding in the area is provided. For this reason, the worker who works on the work floor 2 is in the vicinity of the short side 2a of the work floor 2 without touching the work floor 2 by touching the notification bar 14 in the functional position. Can recognize that Therefore, when the work to a relatively high place such as the ceiling or the back of the ceiling is performed while moving along the longitudinal direction of the work floor 2, the worker passes through the short side 2a of the work floor 2 without knowing it. Thus, a situation where the work floor 2 is stepped off can be avoided.

Further, the notification bar 14 is made of a rubber material having elasticity, and is pressed against an operator who moves up and down between the work floor 2 and the leg 3 to allow the operator to pass therethrough. In addition to bending flexibly, the worker is separated to return to a state (functional position) extending along the short side 2a of the original work floor 2. For this reason, the operator can perform the raising / lowering operation between the work floor 2 and the leg 3 in the same manner as in the case where the notification bar 14 is not provided, and is not forced to perform any special work. 14 can be pushed away and the short side 2a of the work floor 2 can be passed. Furthermore, after the operator passes through the short side 2a of the work floor 2, the notification bar 14 is restored to its original state by its own elastic force, so that the operator can return the notification bar 14 to the functional position. There is no need to do work. Therefore, it is possible to move up and down relatively smoothly between the work floor 2 and the legs 3 while ensuring safety as described above.

  Further, the notification bar 14 protrudes from the pair of clue bars 4 provided corresponding to both ends of each short side 2a of the work floor 2 to the upper area of the work floor 2, and the pair of clue bars 4 are In the direction along the short side 2a of the work floor 2, they are provided apart from each other. For this reason, the length of each notification bar 14 can be made as short as possible and, as a result, as light as possible. As a result, the function for notifying the operator of the position is lowered due to, for example, the notification bar 14 hanging down, or the notification bar 14 is too hard to prevent the drooping, and the notification bar 14 is pushed away. The situation where it becomes relatively difficult to pass can be suppressed. In addition, since the tip portions of the pair of notification bars 14 are separated from each other in the extending direction of the short side portion 2a, when the worker gets off the work floor 2, the worker is pushed away and elastically deformed. Then, it is possible to suppress a situation in which the notification bar 14 that vibrates until it stops at the functional position contacts the operator's face or the like. Furthermore, since the tip portions of the pair of notification bars 14 are separated in the extending direction of the short side portion 2a, the amount of deflection of the notification bar 14 when the operator passes through the central portion of the short side portion 2a is reduced. Since it becomes small, deterioration of the notification bar 14, etc. can be suppressed as much as possible.

  Further, the notification bar 14 is located on the center side in the longitudinal direction of the work floor 2 with respect to the short side portion 2 a of the work floor 2. For this reason, the front of the body is directed to one long side of the work floor 2 and the worker who is working with the feet wider than the shoulder width is in contact with the notification bar 14 before the worker contacts the worker. It is possible to more reliably prevent a situation in which the other foot dive below the notification bar 14 and step outside the short side 2a of the work floor 2. Since the notification bar 14 has elasticity and can be deformed in a follow-up manner, even if the notification bar 14 is arranged on the inner side of the short side portion 2a of the work floor 2, the short side portion 2a of the work floor 2 is The worker who has grasped by visual observation can move his / her foot to the vicinity of the short side 2a of the work floor 2 while pushing the notification bar 14 slightly, and the short of the work floor 2 without being obstructed by the notification bar 14. It can be used as a scaffold to the vicinity of the side 2a. Of course, there is no need to push the notification bar 14 by hand at this time, and workability when using the portion near the short side 2a of the work floor 2 as a scaffold is not reduced.

  In addition, in the present embodiment, the notification bar 14 is configured to be able to be rotationally displaced in an emergency avoidance between the functional position and the storage position. For this reason, the workability | operativity at the time of raising / lowering a comparatively big load with respect to the work floor 2 via the short side part 2a of the work floor 2 can be improved. Furthermore, when the clue bar 4 is set to the immersive position or the portable work table 1 is folded, the notification bar 14 can be stored more suitably.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the above embodiment, the position notification mechanisms 11 are provided on both of the pair of clue bars 4 provided corresponding to both ends of the short side 2a of the work floor 2, but provided on at least one of them. It only has to be done. Moreover, in the said embodiment, although the clue stick | rod 4 is provided corresponding to the four corners of the work floor 2, what is necessary is just to be provided in at least one of the both ends of each short side part 2a of the work floor 2. FIG. . However, in the case where the position notification mechanism 11 is provided only on one end side of the short side 2a, it is necessary to configure the notification bar 14 to be relatively long and to project a relatively long distance from the mounting plate 13. . In this case, since the notification bar 14 may hang down or the notification bar 14 may become too hard, the position notification mechanism 11 is provided corresponding to both ends of the short side portion 2a as in the above embodiment. It is desirable.

  (B) In the above embodiment, the bar detection means (sensor, switch, etc.) for detecting the notification bar 14 in the storage position and the notification sound generation means are provided, and the bar detection means is set after the portable worktable 1 is in the standing state. The notification sound may be generated by the notification sound generating means while the notification bar 14 is detected. In this case, the use of the notification bar 14 will be more thorough. In addition, although the structure which detects the operator located in the short side part 2a vicinity of the work floor 2 with a sensor and generate | occur | produces a notification sound is also considered, there exists a possibility that a notification sound cannot be heard in a construction site etc. with a noisy noise. As in the above embodiment, it is desirable to provide the notification bar 14 and notify the worker by contact.

  (C) Further, in the above embodiment, the notification bar 14 is configured to be displaceable between the functional position and the storage position, but is configured to remain in a position protruding to the upper area of the work floor 2. May be. In this case, when the portable worktable 1 is used, the notification bar 14 is used without fail, so that safety can be further ensured.

  In addition, in the said embodiment, although the alerting | reporting bar 14 in a functional position is extended substantially horizontal, you may incline up and down. In the above embodiment, the notification bar 14 extends along the short side 2a of the work floor 2. However, the notification bar 14 does not necessarily have to be parallel when viewed in plan. You may incline toward the direction center side. In this case, the front end portion of the notification bar 14 is set to the longitudinal center side of the work floor 2 to notify the worker of the short side portion 2a of the work floor 2 at an early stage and elastically deformed when the worker gets off the work floor 2. It is possible to suppress a situation in which the notification bar 14 that vibrates due to the contact with the face of the operator is caused.

(D) In the above-described embodiment, the clue bar 4 is configured to be relatively slidable along the longitudinal direction of the leg 3. For example, the clue bar 4 is configured with the vicinity of the upper end of the leg 3 as the center of rotation. You may comprise so that rotation is possible, and the clue stick | rod 4 may be attached to the leg part 3 so that relative displacement is impossible using attachment members, such as a volt | bolt. In addition, the clue bar 4 can be attached to the work floor 2. However, as in the above embodiment, when mounting slidably along the clue rod 4 in the longitudinal direction of the leg portion 3, to avoid a situation notification bar 14 will flapping during displacement cues rod 4 Can do.

  Moreover, in the said embodiment, although the clue stick | rod 4 is inclined and extended in the longitudinal direction center part side of the work floor 2 along the longitudinal direction of the leg part 3, the extension direction of the clue stick | rod 4 and the leg part 3 are extended. For example, the clue bar 4 may be extended vertically. However, the position of the notification bar 14 is short of the work floor 2 so that the worker's feet do not pass the lower part of the notification bar 14 and step on the work floor 2 when the worker spreads his / her legs. It is desirable that it is located closer to the center in the longitudinal direction of the work floor 2 than the side 2a.

  (E) In the above embodiment, a handrail that extends along each long side portion of the work floor 2 and connects the upper portions of the pair of clue bars 4 provided corresponding to both ends of the long side portion of the work floor 2 It is good also as providing. When a handrail or the like is attached to the upper end portion of the clue bar 4, the position notification mechanism 11 can be configured to be attached in the vicinity of the upper end portion of the clue bar 4, Both the notification mechanism 11 and the handrail can be configured to be attachable. For example, a relay member provided with an attachment portion attached to the upper end portion of the clue bar 4, a handrail engagement portion that engages one end portion of the handrail, and an attached portion to which the position notification mechanism 11 is attached, It is good also as providing the handrail latching | locking part which latches the one end part of a handrail with respect to the attachment board 13 of the position alerting | reporting mechanism 11. FIG. When a handrail is provided, the notification bar 14 may be configured to be attachable to the handrail.

  (F) In the above embodiment, the configuration for attaching the position notification mechanism 11 to the clue bar 4 is not particularly limited. For example, as shown in FIG. 5, a pair of locking pieces 41 that protrude downward from the lower surface of the mounting plate 13 and have locking claws 42 at the tip are provided, and are generally covered with the upper end of the clue bar 4. The cap is formed on the clasp bar 4 for removing the cap, inserting a pair of locking pieces 41 inside the square cylindrical clasp bar 4, and locking the claw portion formed on the inner surface of the cap. The position notification mechanism 11 may be attached by locking the locking claw 42 with respect to the locking hole 44.

  In addition, the cap which covers the upper end part of the clue bar 4 is removed by adopting a configuration in which the substantially box-shaped connecting part 12 which opens downward is applied to the upper end part of the clue bar 4 as in the above embodiment. There is no need.

  (G) In the above embodiment, the entire notification bar 14 is made of rubber. However, the notification bar 14 is not particularly limited to such a configuration, and at least a part of the notification bar 14 in the longitudinal direction has elasticity. It suffices to be configured. For example, as shown in FIG. 6, the notification bar 14 includes a coil spring 51 and a rubber portion 52 provided on one end portion side of the coil spring 51, and the rubber portion 52 of the coil spring 51 is provided. The side opposite to the formed side may be cantilevered by an elbow tubular fixing portion 53 fixed to the mounting plate 13.

  Note that at least the surface of the tip of the notification bar 14 is preferably made of a relatively soft material. In this case, even if the notification bar 14 that vibrates due to the elastic deformation when the worker passes through the short side 2a of the work floor 2 collides with the worker, the impact on the worker is reduced. Can be made. On the other hand, the portion of the notification bar 14 that is supported by being in contact with the upper surface of the mounting plate 13 and the portion where the shaft hole 24 is formed are made of a relatively hard material in order to suppress scraping and scraping. It is good as well. However, the notification bar 14 is composed of an elastic portion made of a material (rubber, spring, etc.) that has elasticity in its longitudinal direction and a non-elastic portion made of a material (such as hard resin) that is not so elastic. In such a case, at least on the reporting bar 14 on the root side (axial pin 24 side) of the longitudinal center portion so that the distal end side can be relatively greatly deformed while reducing the burden on the elastic portion as much as possible. It is desirable that a part of the part is constituted by an elastic part.

  Moreover, in order to suppress the situation where the notification bar 14 is caught by the worker when the worker passes, it is desirable that the surface of the notification bar 14 be made of a material having a relatively high slidability (small friction). Further, it is desirable that the notification bar 14 be as light as possible. For example, the notification bar 14 may be configured to be hollow (tubular or open downward and provided with reinforcing ribs that connect the side walls). Good.

  (H) In the above embodiment, the height position (at the tip) of the notification bar 14 may be adjustable. For example, the notification bar 14 can be configured to be slidable up and down while maintaining the angle of the notification bar 14, or the angle of the notification bar 14 can be changed, and the notification bar 14 can be held at a desired height (angle). It may be configured. In this case, the height of the notification bar 14 can be adjusted to a height suitable for the height of the worker. For example, when the worker wears a tool bag or the like on the waist, the notification bar 14 It is also possible to set the height so that it becomes a height position avoiding the tool bag or the like.

  (I) In the above embodiment, a plurality of notification bars 14 may be provided so as to be lined up and down with respect to one clue bar 4. Moreover, it is good also as changing the height of a pair of alerting | reporting bar 14 provided corresponding to the both ends of the short side part 2a of the work floor 2, or changing inclination. When these configurations are adopted, the notification bar 14 can prevent the worker from touching only a portion where it is difficult to detect contact such as a pocket of a work clothes or a belt. It can be made to recognize more reliably that 14 touched the operator.

  Furthermore, in the said embodiment, although it has comprised so that the front-end | tip parts of a pair of alerting | reporting bar 14 provided corresponding to the both ends of the short side part 2a may mutually space apart in the direction along the short side part 2a. , May be substantially in contact with each other, or may partially overlap. However, even if the notification bar 14 is shortened as much as possible and the notification bar 14 is not hardened, the notification bar 14 can be smoothly deformed by being pressed by an operator passing through the short side portion 2a while preventing the notification bar 14 from hanging down. From the point of view, the short side portion 2a is provided between the tip portions of the pair of notification bars 14 while considering that the situation where the operator passes the short side portion 2a without touching the notification bar 14 does not occur. It is desirable to make them separate in the longitudinal direction. In addition, in order to avoid the situation where an operator passes without touching the notification bar 14 in a sideways direction (a direction in which the width of the shoulder coincides with the longitudinal direction of the work floor 2), the tips of the pair of notification bars 14 The interval between the parts is preferably 300 mm or less, more preferably 200 mm or less, and further preferably 150 mm or less.

  (J) In the above embodiment, the amount of deformation on the base side (shaft pin 26 side) of the notification bar 14 that protrudes upward from the upper surface of the mounting plate 13 and that is deformed following the raising and lowering of the worker to the work floor 2 is determined. It is good also as providing the root side deformation amount restriction | limiting convex part to restrict | limit. In this case, deformation of the base side of the notification bar 14 can be suppressed, and damage or deterioration of the peripheral portion of the shaft hole 24 or the contact portion with the bearing 21 in the notification bar 14 can be suppressed. .

  Although not specifically mentioned in the above embodiment, when the clue bar 4 is displaced to the immersive position while the notification bar 14 is in the functional position, the lower side of the notification bar 14 is on the upper surface of the work floor 2. If the structure is such that it is guided and rotated to the storage position side, there is a risk that problems such as pinching the operator's hand holding the upper portion of the clasp bar 4 and pushing down the clasp bar 4 may occur. For this reason, even if the clue bar 4 is in the immersive position, the notification bar 14 is configured to be positioned above the work floor 2, or even if the notification bar 14 rotates while being guided by the work floor 2. 14 may be configured so that the rotation is as slow as possible by the action of a weight connected to the wire 14 via a wire (the notification bar 14 can be automatically and safely accommodated).

  DESCRIPTION OF SYMBOLS 1 ... Portable worktable, 2 ... Work floor, 2a ... Short side part, 3 ... Leg part, 4 ... Cue stick | rod, 11 ... Position notification mechanism, 14 ... Notification bar.

Claims (3)

A substantially rectangular plate-like work floor;
Ladder-like legs that extend downward from a pair of opposing short sides of the work floor and can support the work floor at a predetermined height position;
In a portable workbench provided with a corner bar of the work floor or a clue bar protruding upward from the vicinity thereof,
The cue stick provided corresponding to at least one of the both ends of each short side portion of the work floor, from the upper end portion thereof, or from the vicinity of the upper end portion, the short side portion of the work floor A notification bar is provided in which one end is supported and the other end protrudes into the air above the work floor,
The notification bar has elasticity in at least a part of the protruding direction, and is pressed against an operator who moves up and down between the work floor and the leg portion, thereby allowing the operator to pass therethrough. A portable worktable characterized by being bent and returning to a state extending along the short side of the original work floor when the worker is separated. The clue bar protrudes upward from the four corners of the work floor or its vicinity,
The notification bar protrudes from a pair of the clue bars provided corresponding to both ends of each short side of the work floor to the upper area of the work floor, and the pair of clue bars are the work floor The portable workbench according to claim 1, wherein the worktables are spaced apart from each other in a direction along the short side portion.   The portable work according to claim 1 or 2, wherein at least a front end portion in the protruding direction of the notification bar is located on a longitudinal center side of the work floor with respect to a short side portion of the work floor. Stand.

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