JP2011226149A - Portable workbench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable workbench which gives no excessive sense of security to a worker and allows the worker to recognize effectively the end of a top plate.SOLUTION: In a portable workbench which has leg bodies 2, 2 at both ends of a top plate 1, at least one of the legs being ladder-shaped, and four handrail posts 5 erected at the four corners of the top plate 1 respectively, a girder-side end sensing rope 7 is extended between two handrail posts 5, 5 opposed to each other in the longitudinal direction of the top plate 1, for making a user recognize the girder-side end of the top plate 1.

Description

  The present invention relates to a portable work table used when performing work such as interior finishing of a ceiling, wiring in a ceiling, piping, and the like at a construction site or the like. Here, the portable work table is a work table that is not fixed to the floor but can be carried and easily moved by a caster or the like.

  In a portable work table intended for work on the top plate, in order to prevent the operator's feet and body from protruding from the top plate as the work floor and to prevent a fall accident, This is achieved by using a band-like protrusion having a width that can be sensed by the sole in the vicinity of the head and / or the end on the side of the wife (Patent Document 1), or by using a clue bar erected at the four corners of the top plate. A handrail consisting of a handrail post fitted and attached to the rail and a horizontal rail that spans between the opposite handrail posts is used as a sensing bar. When an operator touches this sensing bar, There is one (Patent Document 2) that senses that it is a girder side end or a wife side end of the top plate.

JP 2004-293290 A JP 2008-8135 A

  In the workbench of patent document 1, it is difficult to make an operator know effectively that it is an edge part of a top plate. Moreover, although the handrail structure installed using a clue bar like patent document 2 has a problem in intensity | strength, there exists a danger which gives an operator excessive sense of security. That is, there is a problem in providing a handrail on the workbench as in Patent Document 2, and in particular, when the workbench is portable, only the rollover resistance of the workbench main body is secured without fixing the workbench main body to the floor or the like. In most cases, the stability of the work table itself is ensured by providing strong handrails on the workbench, although the strength between the workbench and the handrail is maintained. There is a risk that overwork given to the worker may cause a sense of security and cause the worktable body to roll over.

  In view of the above circumstances, the present invention provides a portable workbench that can effectively inform the operator of the end of the top plate without giving an excessive sense of security to the operator. With the goal.

  Means for solving the above-described problems will be described with reference numerals of the embodiments described later. The invention according to claim 1 is that the legs 2, 2 having a ladder shape at least at one end at both ends of the top plate 1. In the portable work table in which handrail columns 5 are erected at the four corners of the top plate 1, the end side of the top plate 1 between the handrail columns 5 and 5 facing the longitudinal direction of the top plate 1 It is characterized in that a girder side end sensing cord 7 for informing that it is an end is stretched.

  Claim 2 is the portable workbench according to claim 1, wherein the top end of the top plate 1 is the end of the top end 1 between the two handrail support columns 5, 5 facing the short side of the top plate 1. It is characterized in that a wife-side end sensing cord 22 for informing is stretched.

  The third aspect of the portable workbench according to the first aspect of the present invention informs that it is the end portion side end portion of the top plate 1 between the two handrail columns 5 and 5 facing the longitudinal direction of the top plate 1. The girder-side end sensing cable body 7 is stretched, and the gable-side end side end portion of the top plate 1 is positioned between the two handrail struts 5 and 5 facing the transversal direction of the top plate 1. It is characterized in that a wife-side end sensing cord 22 for informing is stretched.

  According to a fourth aspect of the present invention, in the portable worktable according to any one of the first to third aspects, the one of the two handrail struts 5 and 5 on which the rope bodies 7 and 22 are stretched is connected to the rope bodies 7 and 22. An alarm device 9 is provided that issues an alarm when a certain level of tension is applied.

  A fifth aspect of the present invention is the portable worktable according to any one of the first to third aspects, wherein one end of the rope bodies 7 and 22 is attached to one of the two handrail struts 5 and 5 on which the rope body 7 is stretched. It is connected to the provided cable body winding device 8 so that it can be wound and pulled out, and the other end is connected to the other handrail support column 5 so as to be detachable.

  A sixth aspect of the present invention is the portable work bench according to any one of the first to third aspects, wherein one end portion of the rope bodies 7 and 22 is provided between the handrail support columns 5 and 5 on which the rope bodies 7 and 22 are stretched. It is connected to a rope take-up device 8 provided on one side so as to be able to be wound and pulled out, and the other end is provided on the other handrail support column 5, and the ropes 7 and 22 have a certain tension or more. It is characterized in that it is detachably connected to an alarm device 9 that issues an alarm when an error occurs.

  The effect of the invention by the above-described solution means will be described with reference numerals of embodiments to be described later. According to the invention according to claim 1, between the handrail support columns 5 and 5 facing the longitudinal direction of the top plate 1, Since the girder-side end sensing cord 7 is stretched, an operator working on the top plate 1 touches the girder-side end sensing cord 7 so that the touched point is the top plate 1. It is possible to detect that it is the end portion of the girder side and to prevent accidents such as falling from the end portion of the girder side. In this case, the operator is in a dangerous state because the girder edge detection cable 7 is not a structurally stable structure such as a handrail, but is pushed outward when it leans down. Since it is recognized in advance, it is possible to effectively sense the danger such as falling by just touching the cable body 7 without giving the worker an excessive sense of security.

  According to the second aspect of the present invention, since the wives side end sensing rope 22 is stretched between the two handrail struts 5 and 5 facing in the short direction of the top board 1, The worker who works works by touching the wife side end sensing cable 22 to sense that the touched point is the wife side end of the top board 1, and falls from the wife side end. Accidents can be prevented. In this case, the worker is not in a structure that is stable in strength, like the side rail of the handrail, but the wife side end sensing cable body 22 is pushed outward and puts it in a dangerous state. Since it is recognized in advance, the operator can effectively sense the danger of falling by touching the cable body 22.

  According to the third aspect of the present invention, the girder-side end sensing rope 7 is stretched between the two handrail struts 5, 5 facing the longitudinal direction of the top plate 1, and in the short direction of the top plate 1. Since the wife side end sensing cord 22 is stretched between the opposite handrail support columns 5 and 5, the operator working on the top board 1 touches the girder end sensing cord 7. , It is possible to sense that the touched point is the end of the top side of the top plate 1, and the touched point is the end of the top side of the top plate 1 by touching the wives side end detecting cord 22. It is possible to prevent accidents such as falling from the end portion of the girder and the end portion of the wife. In this case, when the operator leans on the girder-side end sensing cord 7 and the wife-side end sensing cord 22 instead of a structurally stable structure such as a handrail horizontal rail, Since it is recognized in advance that it will be pushed out and become dangerous, it is possible to make the worker effectively sense the danger of falling by touching the cable body 22.

  As in the invention according to claim 4, an alarm is issued when a certain level of tension is applied to one of the two handrail struts 5, 5 on which the cable bodies 7, 22 are stretched. When the alarm device 9 is provided, the worker senses a certain degree of danger when the operator touches the cords 7 and 22, and the operator's body strongly touches the cord 7 and the alarm device 9 is brought into contact. By operating, it is possible to inform the operator of the danger more effectively.

  As in the invention according to claim 5, the rope body winding device in which one end portion of the rope bodies 7 and 22 is provided on either one of the handrail struts 5 and 5 on which the rope bodies 7 and 22 are stretched. When the work table is not used, the other ends of the ropes 7 and 22 are connected to the other handrail support column 5 so that the other end can be separated and wound. By separating the portion from the handrail support column 5 and winding it around the rope body winding device 8, the rope bodies 7 and 22 can be stored compactly.

  As in the invention according to claim 6, a rope winding device in which one end portion of the rope bodies 7 and 22 is provided on either one of the two handrail struts 5 and 5 on which the rope bodies 7 and 22 are stretched. 8 is connected to the other handrail support column 5 so that it can be wound and pulled out, and an alarm device 9 that issues a warning when a certain level of tension is applied to the ropes 7 and 22 is applied. In such a case, the worker senses a certain degree of danger when touching the rope bodies 7 and 22, and the worker's body strongly touches the rope bodies 7 and 22. When the alarm device 9 is activated, the operator can be notified of the danger more effectively, and when the work table is not used, the other ends of the ropes 7 and 22 are connected to the handrail column 5. The cords 7 and 22 are stored compactly by separating from the cord and winding it on the cord take-up device 8 Rukoto can.

(a) is a top view which shows embodiment of the portable worktable which concerns on this invention, (b) is a front view. (a) is an enlarged view of a portion indicated by an arrow A in FIG. 1 (b), and (b) is a partially sectional front view of the portion shown in (a). FIG. 3 is a partial cross-sectional front view similar to FIG. 2 (b) showing a state in which a tension is applied to a girder-side end sensing cable body and an alarm device is activated. It is an external appearance perspective view which shows the state which connected the one end part side of the rope body to the rope body winding apparatus, and connected the other end part to the rope body edge part attachment tool.

  A preferred embodiment of the portable worktable of the present invention will be described below with reference to the drawings. In the worktable T shown in FIG. 1, ladder-like legs 2, 2 are respectively provided at the left and right ends of the top plate 1. As shown in FIG. 1 (b), the rotating bracket 3 lies between an open leg state that is tilted upright and a closed leg state that is folded along the lower surface of the top plate 1 (not shown). The stay 4 is provided between the top plate 1 and the leg 2 so as to be freely bent. As shown in FIG. 1 (a), each ladder-like leg 2 is composed of a pair of leg columns 2a, 2a arranged in a divergent shape, and a step horizontally laid in a plurality of stages between the two leg columns 2a, 2a. It is comprised by the crosspiece 2b. In the illustrated embodiment, both the legs 2 and 2 are formed in a ladder shape, and the legs 2 and 2 are work benches in a side view trapezoidal shape inclined in a divergent shape in an open leg posture. However, the portable worktable according to the present invention provided with a sensing device as described below is limited to a worktable having a trapezoidal shape in a side view in which both legs 2 and 2 form a ladder that can be lifted and lowered. It is not a thing, the raising and lowering surface forms a ladder shape that can be raised and lowered only on one side, that is, only one leg 2, and the other leg 2 is a mere leg and cannot be raised or lowered, It is assumed that the pair of pedestal columns on both sides forming the leg is not widened at the end, and includes a work table composed of a pair of parallel pedestal columns.

  Handrail struts 5 are provided at the four corners of the top plate 1 so as to be positioned at the elevators between the legs 2 and the top plate 1, and each handrail strut 5 has a lower end portion outside the leg body 2. It is pivotally attached by a mounting bracket 6 attached to the upper end of the side surface, and stands up as shown by a solid line in FIG. 1 (b), and a leg of a leg 2 as shown by an imaginary line in FIG. The posture can be changed to a folded posture folded along the pillar 2a. Incidentally, the handrail support column 5 is originally used as a support post for handrails when the handrail is installed on the top board 1, but like the portable work table according to the present invention. When the sensing device is provided, it is used as a support for stretching the girder edge sensing cable as described below, and by itself, an operator can go up from the leg 2 to the top 1 or from the top 1 It is used as a clue bar when descending the leg 2.

  And between the upper end part of one handrail support column 5 and the upper end part of the other handrail support column 5 of both handrail support columns 5, 5 facing the longitudinal direction of the top plate 1, the end part on the side of the top plate 1 A girder end sensing cord 7 for informing that is stretched. One end of each girder-side end sensing rope 7 is wound around a rope take-up device 8 attached to one handrail strut 5 of the handrail struts 5 and 5 on which the rope 7 is stretched. The other end of the cable body 7 is connected to the other handrail support column 5 so that it can be pulled out. The other end of the cable body 7 is separated from the alarm device 9 that issues an alarm when a certain level of tension is applied to the cable body 7. Connected as possible.

  The spar-side end sensing cord 7 shown in this embodiment is made of a long belt-like tape formed of a material such as a fiber belt. As shown schematically in FIG. 4, a cable body winding device 8 in which one end portion of the cable body 7 made of this tape is connected so as to be able to wind and withdraw, and a cylindrical case 10 that houses the cable body 7, A reel (not shown) that is pivotally supported in the case 10, winds and holds the cord body 7 and rotates the cord body 7 in a clockwise and counterclockwise rotation, and a case 10 One end portion is attached to a support shaft (not shown) provided on the other end, and the other end portion is composed of a spiral spring (not shown) fixed to the reel. The winding force is acting inside. For this reason, a lock mechanism (not shown) for holding the drawn cable body 7 at a fixed length is provided inside the case 10, and a lock button 11 for turning on / off the lock state by the lock mechanism. Is disposed in the case 10. The case 10 is provided with an attachment member 12 for attaching the case 10 to the handrail support column 5.

  In the alarm device 9 in which the other end of the cable body 7 is detachably connected, as illustrated in FIGS. 2 and 3, when the buzzer 13 rings when a certain level of tension is applied to the cable body 7. At the same time, the rotating lamp or lighting lamp 14 rotates or lights up to emit light. That is, this alarm device 9 is provided in the cable body end fitting 15 attached to the other end of the girder side edge sensing cable 7 and the upper end of the handrail column 5, and is connected via the wire 16. A tension coil spring 17 that pulls the cable body 7 and attracts and fixes the cable body end fixture 15 to the upper end of the handrail support column 5 and is always in an off state. A switch 18 that is turned on in conjunction with the wire 16 when the above tension is applied, for example, a tension that pushes the cable body 7 to the outside of the top board 1 by touching the operator's body; The rotating lamp (or lighting lamp) 14, the power source 19, and the switch 18, the rotating lamp (or lighting lamp) 14 and the power source 19 are connected to the power source 19.

  As shown in FIG. 2B and FIG. 3B, the wire 16 of the alarm device 9 is connected to the other end 17b of the coil spring 17 in which one end 17a is fixed in the handrail support column 5. 16a is connected, and the intermediate portion thereof is supported by the guide support shaft 21, and the other end portion 16b extending horizontally from the guide support shaft 21 is fixed to the attachment body 15a of the cable body end attachment tool 15. The predetermined portion 16c of the horizontal portion of the wire 16 is fixed to the tip of the operation bar 18a of the switch 18. Therefore, when the wire 16 moves when a tension of a certain level or more is applied to the girder side end sensing cord 7, the operation bar 18a of the switch 18 swings as shown in FIG. By pressing the terminal 18b of the switch 18, the switch 18 is turned on and the buzzer 13 sounds. At the same time, the rotating lamp or the lighting lamp 14 rotates or lights up to emit light, thereby promoting the risk of falling. What is necessary is just to make it connect the other end part 16b of the said wire 16 to the fixing member 23 embed | buried under the fixture main body 15a, for example. In this embodiment, both the sound of the buzzer 13 and the light of the rotating lamp or the lighting lamp 14 are warned at the same time, but only the buzzer 13 is operated or only the rotating lamp or the lighting lamp 14 is operated. Good. In FIG. 2 (a), reference numeral 24 denotes a cushion member for absorbing and mitigating the impact at the time of rollover when the work table T rolls over.

  As shown in FIG. 4, the cable body end fitting 15 is fixed to the fixture main body 15a and the other end of the spar-side end sensing rope 7, and is above the fixture main body 15a. The engagement member 15b is detachably engaged, and the engagement member 15b is kept in an integral state engaged with the fixture body 15a when the girder side end sensing cord 7 is used. When the cable body 7 is not used, the engaging member 15b is pulled out from the fixture main body 15a as shown by the phantom line in FIG. 4, and the cable body 7 is wound on the reel (not shown) of the cable body winding device 8 by a spiral spring. It is wound and stored with an urging force (not shown), and the engaging member 15b is kept in a state of being locked to the case 10.

  Explaining how to use the portable work table T configured as described above, FIG. 1 shows the use state of the work table T, both legs 2 and 2 are opened, and each handrail support column 5 is Between the upper ends of the handrail struts 5 and 5 that are held in a standing posture and are opposed to each other in the longitudinal direction of the top plate 1, the girder side end sensing ropes 7 are suspended in use.

  Therefore, an operator who goes up from the leg 2 to the top plate 1 can go up to the top plate 1 while securing safety by grasping the handrail support column 5 as a clue bar. Since the girder side end sensing cord 7 is bridged between the handrail struts 5 and 5 facing the longitudinal direction of the top plate 1, the operator working on this top plate 1 When the sensing cord 7 is touched, it can be sensed that the touched point is the end portion of the top side of the top plate 1, and accidents such as falling from the end portion of the top side can be prevented. In this case, if a part of the operator's body is in a state that protrudes from the end of the spar of the top plate 1, the cord 7 is always touched. Can let you know.

  In addition, not only the operator's body touches the spar-side end sensing cord 7 but also the operator's body protrudes from the spar-side end of the top plate 1 and the cord 7 is pushed out. When a certain tension or more is applied to the cable body 7, the wire 16 of the alarm device 9 attached to the cable body end fitting 15 pulls the coil spring 17, as shown in FIG. The switch 18 is turned on by the movement of the wire 16 and the buzzer 13 sounds. At the same time, the rotating lamp or the lighting lamp 14 rotates or lights up to emit light (in this case, only the buzzer 13 may be activated, Only the rotating lamp or the lighting lamp 14 may be operated), and the risk of falling is positively promoted. In this case, the operator is not sure that the spar-side edge sensing cable body 7 is not a structurally stable structure like a handrail, but will be pushed out of the body and become dangerous. Since it has been recognized in advance, a certain degree of danger is sensed when the cord 7 is touched, and the alarm device 9 is activated such that the operator's body is in strong contact with the cord 7 and the buzzer 13 sounds. By doing so, it is possible to inform the worker of the danger more effectively.

  After the use of the work table T, the engaging member 15b of the fixture 15 attached to the end of the cable body 7 is moved upward from the fixture main body 15a as shown by the phantom line in FIG. When the cable body 7 is pulled out and pulled out, the cable body 7 is wound around the reel of the cable body winding device 8 attached to one handrail support column 5 by the urging force of the spiral spring and is stored compactly.

  Thus, after the rope body 7 is stored on one handrail support column 5 side, each handrail support column 5 is folded along the leg 2a of the leg body 2, and although not shown in the drawings, both leg bodies 2, 2 are attached to the top plate. 1 is folded so as to be parallel to the lower surface of 1 and is closed so that the entire work table T is in a flat state. Thus, by folding the entire work table T in a flat state, it becomes convenient for transportation and storage.

  In the embodiment described above, the girder side end sensing cable for notifying that the girder side end side end of the top plate 1 is only between the two handrail support columns 5 and 5 facing in the longitudinal direction of the top plate 1. Although the body 7 is stretched, as shown schematically in phantom lines in FIG. 1 (a), the end of the top plate 1 on the wife side between the two handrail struts 5 and 5 facing the short side of the top plate 1 By extending the wife side end sensing cable body 22 for informing that it is the part side edge part, when the worker touches the wife side edge part detection cable body 22, the touched point is It is possible to detect that it is the end of the top side of the top 1 and to prevent an accident such as a fall from the end of the end of the top.

  In this way, the girder side end sensing rope 7 is stretched between the two handrail struts 5, 5 facing the longitudinal direction of the top board 1, and the both handrail struts 5 facing the lateral direction of the top board 1. , 5, when the operator touches the girder-side end sensing cable body 7, the touched point is the girder-side end of the top board 1. Can be sensed, and when touching the wives side end sensing cable 22, it can be sensed that the touched point is the wive end of the top board 1. The safety of the above work can be further improved.

  Further, if necessary, the installation of the wives side end sensing rope 22 between the two handrail struts 5 and 5 facing in the short direction of the top board 1 is omitted, and both hands facing the longitudinal direction of the top board 1 are omitted. The girder side end sensing cord 7 may be stretched only between the sliding struts 5 or 5, or the girder side end sensing cord 7 is omitted and the wife side end sensing cord 7 is omitted. Only 22 may be installed.

  In the case where the wives side end sensing cord 22 is stretched between the two handrail struts 5 and 5 facing in the short direction of the top board 1, one end of the cord 22 is stretched by the cord 22. It is connected to the rope winding device 8 provided on either one of the two handrail support columns 5 and 5 that are mounted so as to be able to wind and withdraw, and the other end portion is connected to the other handrail support column 5 so as to be detachable. In addition, one end portion of the rope body 22 is connected to a rope body winding device 8 provided on either one of the two handrail support columns 5 and 5 on which the rope body 7 is stretched so as to be wound and pulled out. The other end may be provided on the other handrail support column 5 so as to be detachably connected to an alarm device 9 that issues an alarm when a certain level of tension is applied to the cable body 7.

  As described above, one end portion of the end-side sensing cable body 22 is wound and pulled out to the cable body winding device 8 provided on one of the two handrail struts 5 and 5 on which the cable body 22 is stretched. When the other end is detachably connected to the other handrail support column 5, the other end portion of the cable body 22 is disconnected from the handrail support column 5 when the work table is not used, By winding the take-up device 8, the cable body 22 can be stored in a compact manner. Further, one end portion of the rope body 22 is connected to the rope body winding device 8 provided on one of the two handrail struts 5 and 5 on which the rope body 22 is stretched so as to be able to be wound and pulled out, and the other end portion is connected. When it is provided on the other handrail support column 5 and is releasably connected to an alarm device 9 that issues an alarm when a certain level of tension is applied to the rope 22, the operator A certain degree of danger is sensed when touching 22, and the alarm device 9 is activated when the worker's body is in strong contact with the cable body 22, thereby informing the worker of the danger more effectively. When the work table is not used, the cable body 22 can be stored compactly by separating the other end portion of the cable body 22 from the handrail support column 5 and winding it around the cable body winding device 8.

  The alarm device 9 shown in FIGS. 2 to 4 is only one embodiment, and is not limited to the structure shown in the figure, and issues an alarm when a certain level of tension is applied to the cable body 7. Any structure is acceptable.

  Further, the girder side end sensing cord 7 and the wife side end sensing cord 22 are made of a long strip tape formed of a material such as a fiber belt in the above-described embodiment. However, in addition to such tapes, metal chains and belts, fiber threads, various strings, wires, ropes, ribbons, and the like can be employed.

  The girder-side end sensing cable body 7 and the wife-side edge sensing cable body 22 are preferably the upper ends of the opposed handrail struts 5, 5, but are not limited to the upper ends, and the handrail struts 5 , 5 can be bridged between the required height parts. Although the alarm device 9 is also provided at the upper end portion of the handrail support column 5 in the above-described embodiment, it can be provided at a position corresponding to the attachment position of the rope bodies 7 and 22. A plurality of alarm devices 9 can be installed on one handrail support column 5 as required. The alarm device 9 is detachably installed on the handrail support column 5 so that maintenance is facilitated and replacement to the required handrail support column 5 is facilitated.

  Moreover, when the extension bar member which extends height to the handrail support | pillar 5 is attached, the said ropes 7 and 22 and the alarm device 9 can be attached to the extension bar member. In addition, when an extension top is spanned between the tops 1 of the plurality of work tables T, the ropes 7 and 22 and the alarm device 9 are attached to the handrail struts 5 positioned at the four corners of the extension top. It can be arranged in the same manner as in the previous embodiment.

DESCRIPTION OF SYMBOLS 1 Top plate 2 Leg body 5 Handrail support | pillar 7 Girder side edge detection cable body 8 Rope body winding device 9 Alarm device 22 Wife side edge detection cable body

Claims (6)

  In a portable worktable with legs that have at least one ladder shape at both ends of the top plate and handrail support columns installed upright at the four corners of the top plate, the top plate is placed between the two handrail support columns facing the longitudinal direction of the top plate. A portable work table with a girder-side end sensing cord for informing that it is a girder-side end-side end of the board.   The wives side end sensing cord for informing that the end of the top side is the end of the top side of the top plate is stretched between both handrail struts facing the short side of the top plate. Portable workbench.   Girder side end sensing cords are stretched between the handrail struts facing the longitudinal direction of the top plate to indicate that it is the end side of the top side of the top plate, and the short direction of the top plate The portable workbench according to claim 1, wherein a wives side end sensing cord for informing that the end of the couch is a wive end portion side end is stretched between both handrail struts facing each other.   4. The alarm according to any one of claims 1 to 3, wherein an alarm device is provided on one of the two handrail struts on which the cable body is stretched to issue an alarm when a certain level of tension is applied to the cable body. Portable workbench.   One end portion of the rope body is connected to a rope winding device provided on one side of the two handrail struts on which the rope body is stretched, and the other end portion is connected to the other handrail pillar. The portable worktable in any one of Claims 1-3 connected so that isolation | separation is possible.   One end portion of the rope body is connected to a rope winding device provided on one side of the two handrail struts on which the rope body is stretched, and the other end portion is connected to the other handrail pillar. The portable worktable according to any one of claims 1 to 3, which is provided and is detachably connected to an alarm device which issues an alarm when a certain tension or more is applied to the cable body.

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