Folding workbench

Abstract

To provide a folding work bench with high durability and capable of extending and being folded smoothly at the folding work bench with a horizontal rail.SOLUTION: In a folding work bench including a top plate 2 in a substantially rectangular shape, a main leg 3 pivoted to the top plate 2 and extends below the top plate 2, a handhold bar 4 pivoted to the top plate 2 or the main leg 3 and extends above the main leg 3. and a girder side horizontal rail 5 horizontally installed at an upper position of a long edge 2L of the top plate 2, a pair of support poles 6 pivoted to the long edge 2L of the top plate 2 spaced away and extends above the top plate 2 is provided, and the girder side horizontal rail 5 is coupled slidably in the extension direction to the support pole 6.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a folding work platform having foldable main landing gear and the like. [Background technology]

[0002] In a folding workbench that can be folded so that the main legs are stacked on the top plate and carried around, a horizontal rail is known to be provided above the side edge of the top plate to allow a worker to identify the position of the side end face of the top plate (for example, Patent Documents 1 to 3).

[0003] The folding workbench disclosed in Patent Document 1 has handrails pivotally connected to the four corners of the top plate, and a crossbar (safety bar) is provided between the tips of a pair of handrails on the long side of the top plate. One end of the crossbar is pivotally connected to the tip of one handrail, and the other end is detachably connected to the tip of the other handrail. The crossbar is formed by connecting a plurality of tubes having different thicknesses in a nested manner, and can be extended and shortened in a plurality of stages in the length direction. Therefore, when folding, the other end of the crossbar is released from the connection state between the tip of the handrail and the other end of the handrail, and then the crossbar is shortened and rotated toward the handrail bar around the one end. This allows the crossbar to be overlapped along the handrail bar. Furthermore, by rotating the handrail bar toward the top plate in this state, the crossbar together with the handrail bar can be overlapped along the side edge of the top plate.

[0004] The folding workbench disclosed in Patent Document 2 has handrail posts (handrail supports) pivotally connected to the four corners of the top plate, and a crossbar (handrail rail) is provided between the tips of a pair of handrail posts on the long side of the top plate. The crossbar is configured to be separable at the middle, and the base ends of the crossbar halves are pivotally connected to the tips of the handrail bars. Therefore, when folding, the tips of the crossbar halves are released from the mutual connection, and then each is rotated toward the handrail bar around its base end. This allows the crossbar to be overlapped along the handrail bar. Furthermore, by rotating the handrail bar toward the main landing gear in this state, the crossbar together with the handrail bar can be overlapped along the side edge of the main landing gear.

[0005] The folding workbench disclosed in Patent Document 3 has handrails pivotally connected to the four corners of the top plate, and a crossbar (guard bar) is provided between the tips of a pair of handrails on the long side of the top plate. Rails are provided on the side of the crossbar, while support rollers are provided at the tips of the handrails, and the support rollers are engaged with the rails so that they can roll. Therefore, when folding, the handrails are tilted toward the top plate, while the crossbars are lowered toward the top plate. This allows the handrails and the crossbars to be overlapped along the side edges of the top plate. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2013-2205 [Patent Document 2] Patent Publication No. 2014-37772 [Patent Document 3] Patent Publication No. 2014-173378 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the folding workbenches of Patent Documents 1 to 3, the horizontal bars are connected and supported between the upper ends of the handrails, so that every time a worker grasps the handrail and ascends or descends, a load is applied to the connection between the handrail and the horizontal bar and to the horizontal bar itself, which may cause deformation or damage. In the folding workbenches of Exhibits 1 and 2, the cross bars are formed by connecting multiple frame members (cylinders, cross bar halves) in the longitudinal direction, so there is a risk of rattling, deformation, or breakage occurring at the joints between these frame members.

[0008] On the other hand, in the folding workbench of Patent Document 3, the vertical movement of the cross bars and the rotation of the handrail can be performed simultaneously in conjunction with each other when unfolding or folding, which can reduce the labor of the work to some extent. However, in this case, the direction in which the cross bars are moved and the direction in which the tip of the handrail (the connection part with the cross bars) moves are different when unfolding or folding, so there is a problem that the cross bars and the handrail swing in an unintended direction or angle, making it impossible to unfold or fold correctly and smoothly. As a result, there is a risk that the workbench will be used in an inappropriate unfolded state or carried in an insufficiently folded state. In addition, when the cross bars or the handrail swing in an unintended direction or angle, there is a risk that the worker's hands or fingers will be caught between the top board.

[0009] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide a folding workbench with cross bars that is highly durable and can be correctly and smoothly unfolded and folded. [Means for solving the problem]

[0010] In order to solve the above problems, the folding workbench of the present invention employs the following technical measures.

[0011] The folding workbench of the present invention is a folding workbench including a substantially rectangular top plate, a main leg pivotally connected to the top plate and extending below the top plate, a handrail pivotally connected to the top plate or the main leg and extending above the main leg, and a girder-side horizontal rail horizontally installed above a long edge of the top plate, The pivot Supported and The top plate is extended above the top plate. , are provided at a distance from each other in the longitudinal direction of the top plate The girder side cross beam is provided with a pair of support columns. The pillar in question The connecting rod is connected to the connecting rod so as to be slidable in the extending direction of the connecting rod.

[0012] Preferably, the girder side crosspiece is provided with a connecting portion for connecting to the support column, and the connecting portion is provided to the support column. The pillar in question A guide portion is provided for guiding along the extending direction.

[0013] Preferably, the support pillar is provided at its tip with a connecting and fixing portion capable of fixing and holding the girder side cross bar in both an unfolded state in which it is erected approximately perpendicular to the top plate, and a folded state in which it is tilted approximately parallel to the top plate.

[0014] Preferably, the roof is provided with a girder side cross beam that is horizontally installed above the short edge of the top plate, and the girder side cross beam is provided above one and the other long edge of the top plate, and the girder side cross beam is pivotally connected at one end to the girder side cross beam on the one side, and the other end is configured to be able to be engaged and held by the girder side cross beam on the other side, and the girder side cross beam is connected to the girder side cross beam on the one side. The girder side crosspiece A receiving portion capable of receiving the container is provided along the extending direction. Effect of the Invention

[0015] According to the folding work platform of the present invention, the girder side cross bar is connected to a pair of support pillars provided separately from the handrail, so even if the worker holds the handrail when ascending or descending, no load is applied to the girder side cross bar. This significantly improves the durability of the folding work platform as a whole. In addition, when unfolding or folding, the girder side cross bar can be slid along a pair of support pillars extended above the top plate, so the girder side cross bar and support pillars do not swing in an unintended direction or angle. This allows for correct and smooth unfolding and folding. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a perspective view of the folding workbench of the embodiment. [Diagram 2] FIG. 2 is a front view of the folding workbench of the embodiment. [Diagram 3] FIG. 2 is a left side view of the folding workbench of the embodiment. [Figure 4] FIG. 2 is a right side view of the folding workbench of the embodiment. [Diagram 5] FIG. 2 is a plan view of the folding workbench of the embodiment. [Figure 6] FIG. 2 is a bottom view of the folding workbench of the embodiment. [Figure 7] FIG. 2 is a perspective view of the folding workbench of the embodiment in a folded state. [Figure 8] FIG. 2 is a front view of the folding workbench of the embodiment in a folded state. [Figure 9] FIG. 2 is a plan view of the folding workbench of the embodiment in a folded state. [Figure 10] FIG. 2 is an enlarged front view of the upper part of the folding workbench of the embodiment. [Figure 11] FIG. 4 is an enlarged front view of the periphery of a short edge of the top plate. [Figure 12] FIG. 1 is an enlarged perspective view of the periphery of a connection between a top plate and a main landing gear. [Figure 13] FIG. 2 is an enlarged perspective view of the periphery of the connection between the top plate and the main landing gear. [Figure 14] FIG. 1 is an enlarged perspective view of the periphery of a side end of a girder surface sensing bar. [Figure 15] FIG. 2 is an enlarged perspective view of the periphery of the side end of the girder surface sensing bar. [Figure 16] FIG. 4 is an enlarged perspective view of the periphery of the side end of the girder surface sensing bar; [Figure 17] FIG. 2 is an enlarged perspective view of the periphery of the side end of the girder surface sensing bar. [Figure 18] FIG. 13 is an enlarged plan view of the periphery of the side end of the girder surface sensing bar. [Figure 19] FIG. 13 is an enlarged perspective view of a side end of the girder surface sensing bar. [Figure 20] 13 is a perspective view of the periphery of a connection portion between the top plate and the sliding support column. FIG. [Figure 21] 13 is an enlarged perspective view of the periphery of the tip of the slide support in a folded state. FIG. [Figure 22]13A is a schematic plan view and FIG. 13B is a schematic front view of the vicinity of the connection between the girder surface sensing bar and the slide support in a folding workbench of another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] A folding workbench according to an embodiment of the present invention will be described below with reference to the drawings. Note that the embodiment described below is an example of the present invention, and the configuration of the present invention is not limited to this specific example.

[0018] As shown in Figures 1 to 6, the folding workbench 1 of this embodiment comprises a top plate 2, main legs 3, handrails 4, a girder surface sensing bar (girder side cross beam) 5, a sliding support (support) 6, and an end surface sensing bar (end side cross beam) 7.

[0019] The top plate 2 is a plate body having a generally rectangular shape when viewed from above. In this embodiment, the longitudinal direction of the top plate 2 is the left-right direction, the lateral direction of the top plate 2 is the front-rear direction, and the thickness direction of the top plate 2 is the up-down direction of the folding workbench 1. In this embodiment, the configuration in the unfolded state will be described as a standard, except when describing the folded state.

[0020] The main landing gear 3 is pivotally connected to the short edge 2S of the top plate 2 and extends below the top plate 2. The handrail 4 is pivotally connected to the main landing gear 3 and extends above the main landing gear 3. The girder surface sensing bar 5 is horizontally disposed above the long edge 2L of the top plate 2. The slide support 6 is The pivot The main legs 3, the handrails 4, the girder surface sensing bar 5, the sliding support 6, and the end surface sensing bar 7 are supported and connected to the support parts and extend above the top plate 2. The end surface sensing bar 7 is installed horizontally above the short edge portion 2S of the top plate 2. The folding work platform 1 can be folded flat as shown in Figures 7 to 9 by rotating or sliding these main legs 3, the handrails 4, the girder surface sensing bar 5, the sliding support 6, and the end surface sensing bar 7 relative to their respective supports.

[0021] Hinge portions 8 that pivotally connect the main legs 3 are provided on the long edge portions 2L of the top plate 2. The hinge portions 8 are provided at positions near the left and right ends of the front and rear long edge portions 2L, i.e., at the front and rear positions of the short edge portions 2S, respectively, and the main legs 3 are connected and supported by the pair of front and rear hinge portions 8.

[0022] The main legs 3 are configured in a ladder shape having a pair of front and rear leg bodies 12 and a number of steps 13. The main legs 3 are pivotally connected to the left and right positions of the tabletop 2, respectively, and extend diagonally downward toward the left and right outside when viewed from the front. The main legs 3 are configured to be rotatable within an angular range from an extended position (see FIG. 2) extending below the tabletop 2 to a folded position (see FIG. 8) extending along the underside of the tabletop 2 and approximately parallel to the tabletop 2.

[0023] The leg body 12 is a long frame body with a generally U-shaped cross section. Meanwhile, the step 13 is a long frame body with a generally rectangular cross section. The leg body 12 is connected to the hinge portion 8 at the base end 3A and extends downward. In the case of this embodiment, the leg body 12 extends diagonally downward and outward from the front to the rear when viewed from the side. In other words, the distance between the front and rear leg bodies 12 increases from top to bottom. A plurality of steps 13 are arranged side by side in the gap at predetermined intervals in the vertical direction.

[0024] As shown in Figs. 10 to 13, a bracket 14 is provided at the base end 3A of the leg body 12 to rotatably support the handrail bar 4. More specifically, the bracket 14 includes a substantially U-shaped base 14A fixed to the leg body 12, and a substantially L-shaped connecting frame 14B formed on a middle plate 14S of the base 14A. The connecting frame 14B includes a back plate 14C formed to stand from the middle plate 14S of the base 14A toward the outside of the leg body 12 (the opposite side to the top plate 2), and an outer plate 14E formed to extend from the outer edge of the back plate 14C at a predetermined interval and substantially parallel to the middle plate 14S. The handrail bar 4 is inserted into the gap between the middle plate 14S and the outer plate 14E.

[0025] As shown in Figs. 1 to 13, the handrail bar 4 is a long frame body having a substantially rectangular cross section. The handrail bar 4 is connected to the base end 3A of the front and rear leg bodies 12, respectively, and extends obliquely toward the upper left and right inner sides when viewed from the front. The base end 4A of the handrail bar 4 is inserted into the gap between the middle plate portion 14S and the outer plate portion 14E of the bracket 14, and is connected and supported by the pivot 15. The pivot 15 is provided between the substantially central portions of the middle plate portion 14S and the outer plate portion 14E. That is, the base end 4A of the handrail bar 4 is connected and supported to be rotatable around the pivot 15 provided at the substantially central position of the bracket 14. Therefore, when the handrail bar 4 is rotated upward about the pivot 15 as a fulcrum, it abuts on the upper half of the back plate portion 14C of the bracket 14, and is held in a position extended above the main leg 3. On the other hand, when it is rotated downward with the pivot 15 as a fulcrum, it comes into contact with the lower half of the back plate portion 14C and is held in a position extended in the same direction as the main legs 3. Also, the middle plate portion 14S is provided with fixing holes 16 at upper and lower positions across the insertion portion of the pivot 15, through which a lock pin 17A described later can be inserted.

[0026] A lock pin 17A is provided at the base end 4A of the handrail bar 4 to prevent the handrail bar 4 from rotating. The lock pin 17A is a cylindrical bar bent into a substantially L-shape, and is configured to be slidable in the forward and backward directions, which are the extension directions, at the pin support portion 17B of the base end 4A. Therefore, when the handrail bar 4 is rotated upward and the lock pin 17A is inserted and engaged with a fixing hole (not shown) on the upper side of the bracket 14, the handrail bar 4 is fixed and held in a rotation-preventing state in the deployed position extended above the main leg 3. On the other hand, when the handrail bar 4 is rotated downward and the lock pin 17A is inserted and engaged with a fixing hole 16 on the lower side of the bracket 14, the handrail bar 4 can be fixed and held in a rotation-preventing state in the folded position extended along the outer surface of the main leg 3.

[0027] The handrail 4 may be pivotally connected to the top plate 2, similar to the sliding support 6. In this case, it is preferable that the handrail 4 is configured so that it is fixed and held in a non-rotating state at the deployed position where it extends above the main legs 3, and at the folded position where it extends along the long edge 2L of the top plate 2, so that the whole structure is flat when folded.

[0028] As shown in Figs. 14 to 18, the girder surface sensing bar (beam side horizontal rail) 5 is a long frame body with a substantially U-shaped cross section, and a groove-like recess 5S is formed on its inner surface (surface on the tabletop 2 side) between both ends. The girder surface sensing bar 5 extends substantially horizontally in the left-right direction (longitudinal direction) of the tabletop 2, and is supported from below by a slide support 6. The girder surface sensing bar 5 is provided at an upper position of one (front side) and the other (rear side) long edge portion 2L of the tabletop 2. In the case of this embodiment, the girder surface sensing bar 5 is disposed at a height that abuts against the lower limbs (near the thighs of an ordinary adult) of a worker standing on the tabletop 2, and by abutting against the lower limbs of the worker, the worker can recognize the positions of the girder surfaces (end faces of the long edge portions 2L) at the front and rear of the tabletop 2 without visually checking them.

[0029] The girder surface sensing bar 5 is relative to the slide support 6 The slide support 6 17 to 19, a connector 18 is provided at the side end 5A of the girder surface sensing bar 5 as a connecting part for connecting to the slide support 6. The connector 18 protrudes outward from the outer surface (the surface opposite the top board 2) of the girder surface sensing bar 5. A flange 18A is formed at the tip of the connector 18, bulging outward along its periphery.

[0030] Further, the side end 5A of the girder surface sensing bar 5 is provided with a first fixing hole 19 for fixing and holding the slide support 6, and a hook portion 20 for hooking and supporting the girder surface sensing bar 5 at a lateral position of the tabletop 2. The first fixing hole 19 is a through hole, and is provided on the outer surface of the girder surface sensing bar 5 (the surface opposite the tabletop 2). The hook portion 20 is a notch formed in a substantially inverted U-shape recessed upward from the underside of the girder surface sensing bar 5, and opens below the girder surface sensing bar 5. The hook portion 20 is provided on each of the left and right side end portions 5A of the girder surface sensing bar 5.

[0031] 14 to 17, a connecting hole 21 for connecting the end face sensing bar 7 is provided at the side end portion 5A of the girder face sensing bar 5. The connecting hole 21 is a through hole, and is provided at the lower surface of the girder face sensing bar 5.

[0032] As shown in Figures 10, 14, and 15, the girder surface sensing bar 5 is provided, at a substantially central position between the left and right sides, with a second fixing hole 22 for fixing and holding the slide support 6 in the folded state, a support hook 23 for supporting the slide support 6 from below, and a hooking hole 24 as a hooking portion capable of hooking and holding the tip 7B of the end surface sensing bar 7. The second fixing hole 22 is a through hole and is provided on the outer surface of the girder surface sensing bar 5 (the surface opposite the top plate 2). The support hook 23 is a plate member bent into a substantially L-shape and is provided on the outer surface of the girder surface sensing bar 5 with the bent portion at the tip facing upward. The hooking hole 24 is a through hole and is provided on the underside of the girder surface sensing bar 5.

[0033] 10 to 18, the sliding support columns (support columns) 6 are long frames having a substantially rectangular cross section, and are provided in pairs at substantially symmetrical positions on the left and right sides of the long edge portion 2L of the tabletop 2. The pair of sliding support columns 6 are erected at positions near the left and right ends of one (front) and the other (rear) long edge portion 2L, respectively. That is, the pair of slide posts 6 are provided spaced apart from each other in the left-right direction (longitudinal direction) of the top board 2. The base ends 6A of the slide columns 6 are connected and supported to the long edge portions 2L of the tabletop 2 via pivots 25. That is, the slide columns 6 are connected and supported to the long edge portions 2L of the tabletop 2 so as to be rotatable around the pivots 25.

[0034] A generally cylindrical spacer (not shown) with a larger diameter than the pivot 25 is fitted between the base end 6A of the slide support 6 at the pivot 25 and the long edge 2L of the tabletop 2. The spacer is set to a length generally equal to the front-to-rear width of the girder surface sensing bar 5. Therefore, a gap S1 of generally equal width to the front-to-rear width of the girder surface sensing bar 5 is always defined between the base end 6A of the slide support 6 and the long edge 2L of the tabletop 2. The pivot 25 (actually, the spacer fitted around the pivot 25) is placed laterally while being exposed to the gap S1.

[0035] As shown in FIGS. 12, 13, 16, and 20, the girder at the long edge 2L of the top plate 2 A support stay 2P for supporting the slide support 6 in an upright position is provided below the surface sensing bar 5. The support stay 2P is a plate member bent into a substantially L-shape, and is provided on the end face of the long edge 2L side of the tabletop 2 with the bent part at the tip facing downward. A fixing hole 26 for fixing and holding the slide support 6 is provided in the bent part at the tip of the support stay 2P. The length of protrusion of the support stay 2P towards the outside of the tabletop 2 (front-to-back direction) is set to be substantially the same as the front-to-back width of the girder surface sensing bar 5.

[0036] A first lock mechanism 27 capable of preventing the rotation of the slide support column 6 is provided at the base end portion 6A of the slide support column 6. As shown in Figs. 11 to 13 and 20, the first lock mechanism 27 includes a lock pin 27A, a pin support portion 27B, and a spring member (not shown). The lock pin 27A is a cylindrical rod bent into a substantially L-shape, and is supported by the pin support portion 27B so as to be slidable in the front-rear direction, which is the extension direction of the lock pin 27A. The lock pin 27A is biased by the spring member so that the tip of the lock pin 27A protrudes outward from the inner surface (surface on the top plate 2 side) of the slide support column 6.

[0037] Therefore, by erecting the sliding support 6 at a substantially right angle to the tabletop 2 and inserting and engaging the lock pin 27A into the fixing hole 26 of the support stay 2P, the sliding support 6 is fixed and held in a position erected at a substantially right angle to the tabletop 2. On the other hand, by pulling the lock pin 27A in the direction opposite to the protruding direction against the pressing force of the spring member and removing it from the fixing hole 26, the fixed state of the sliding support 6 to the girder surface sensing bar 5 is released. As a result, the sliding support 6 becomes freely rotatable around the pivot 25 in its circumferential direction.

[0038] As shown in FIG. 14 to FIG. 18, the slide support 6 is provided with a connector 18 for the girder surface sensing bar 5. Slide Support 6 A groove 28 is provided as a guide section that guides the bar 5 along the extending direction. More specifically, the groove 28 is formed on the side surface of the slide support 6 on the top plate 2 side, from the base end 6A to the tip end 6B. An inner rib 28A is formed protruding from the inside of the groove 28 along the extending direction. The flange 18A provided on the outer periphery of the tip of the connector 18 engages with the inner rib 28A from the inside of the groove 28. As a result, the girder surface sensing bar 5 is connected and held in the groove 28 in a non-dislodging and slidable state.

[0039] A second lock mechanism 29 is provided at the tip 6B of the slide support 6 as a connecting and fixing part capable of fixing and holding the girder surface sensing bar 5 in both the unfolded state where the slide support 6 stands at a right angle to the top plate 2 and the folded state where the slide support 6 is inclined substantially parallel to the top plate 2. As shown in Figs. 17 and 18, the second lock mechanism 29 includes a lock pin 29A, a pin support part 29B, and a spring member (not shown) similar to the first lock mechanism 27. The lock pin 29A is a cylindrical rod bent into a substantially L-shape and is supported by the pin support part 29B so as to be slidable in the front-rear direction, which is the extension direction of the lock pin 29A. The lock pin 29A is biased by the spring member so that the tip of the lock pin 29A protrudes outward from the inner surface (surface on the top plate 2 side) of the slide support 6.

[0040] Therefore, by erecting the left and right slide supports 6 at approximately right angles to the tabletop 2 and inserting and engaging the lock pin 29A into the first fixing hole 19 of the girder surface detection bar 5, the girder surface detection bar 5 is fixed and supported at the tip 6B of the left and right slide supports 6 in a position approximately parallel to the tabletop 2. On the other hand, by pulling the lock pin 29A in the direction opposite to the protruding direction against the pressing force of the spring member and removing it from the first fixing hole 19, the fixed state of the girder surface detection bar 5 to the tip 6B of the slide support 6 is released. As a result, the girder surface detection bar 5 becomes able to slide freely up and down along the slide supports 6 erected on the left and right while remaining in a position approximately parallel to the tabletop 2.

[0041] In addition, by sliding the girder surface sensing bar 5 along the slide support 6 toward the base end 6A as described above, the hook portions 20 provided on both side ends 5A of the girder surface sensing bar 5 are respectively hooked to the base end The girder surface sensing bar 5 is engaged with the pivot 25 that is pressed into the gap S1 between the portion 6A and the tabletop 2. That is, the girder surface sensing bar 5 is engaged and supported by the pivot 25 at both side ends 5A. As a result, the girder surface sensing bar 5 is held in a position where its upper surface is flush with the upper surface of the tabletop 2.

[0042] In addition, after sliding the girder surface sensing bar 5 along the sliding support 6 to the pivot 25 below it, the sliding support 6 is tilted to a position where it is approximately parallel to the top plate 2, and the lock pin 29A of the second lock mechanism 29 is inserted and engaged with the second fixing hole 22 of the girder surface sensing bar 5, so that the sliding support 6 is fixed and held in a position tilted along the girder surface sensing bar 5. The girder surface sensing bar 5 is fixed and held in a position approximately parallel to the top plate 2 by the two second lock mechanisms 29. At this time, the sliding support 6 is supported from below by the support hook 23 as shown in FIG. 21, and the side surface portion located on the upper side is held in a position where it is flush with the upper surface portion of the girder surface sensing bar 5. On the other hand, if the lock pin 29A is pulled in the opposite direction to the protruding direction against the pressing force of the spring member and removed from the fixing hole 22, the fixed state of the sliding support 6 to the girder surface sensing bar 5 is released. As a result, the slide support 6 is able to freely rotate around the pivot 25 in its circumferential direction.

[0043] As shown in Fig. 1 and Figs. 14 to 17, the end surface sensing bar (end side horizontal bar) 7 is a cylindrical rod bent into a substantially U-shape and is provided above one (left side) and the other (right side) short edge portion 2S of the tabletop 2. The end surface sensing bar 7 extends substantially horizontally in the front-to-rear direction (short side direction) of the tabletop 2 and is connected and supported by the side end portion 5A of the girder surface sensing bar 5 facing the front-to-rear direction. In the present embodiment, the end surface sensing bar 7, like the girder surface sensing bar 5, is disposed at a height that abuts against the lower legs (near the thighs of an average adult) of a worker standing on the tabletop 2, and by abutting against the lower legs of the worker, the worker can recognize the positions of the left and right end surfaces (end faces of the short edge portions 2S) of the tabletop 2 without visually checking them.

[0044] The end face sensing bar 7 is disposed horizontally between the girder face sensing bars 5 so that the bent ends 7A, 7B at both ends extend downward, with the bent end (one end) 7A at one end pivotally connected to the girder face sensing bar 5 on one side, and the bent end (other end) 7B at the other end configured to be hooked and held by the girder face sensing bar 5 on the other side. In other words, the end face sensing bar 7 is connected to the girder face sensing bar 5 so as to be rotatable around the bent end 7A at one end.

[0045] Therefore, the end face sensing bar 7 is released from the engagement state of the bent end portion 7B on the other end side, and is rotated around the bent end portion 7A on one end side so as to overlap with the girder face sensing bar 5 on the supporting side, so that the end face sensing bar 7 is in the recess 5S on the inner surface of the girder face sensing bar 5, The corresponding digit surface sensing bar 5 In this case, the bent end portion 7B on the other end side can be hooked and held in the hook hole 24 of the girder surface sensing bar 5.

[0046] In this way, the folding workbench 1 of the above embodiment includes a substantially rectangular top plate 2, a main leg 3 pivotally connected to the top plate 2 and extending below the top plate 2, a handrail 4 pivotally connected to the top plate 2 or the main leg 3 and extending above the main leg 3, and a girder surface sensing bar (girder side horizontal crosspiece) 5 horizontally installed above the long edge portion 2L of the top plate 2. The pivot Supported and Extends above the top plate 2 , are provided at a distance from each other in the longitudinal direction of the top plate 2.The girder surface sensing bar 5 is connected to the pair of slide supports 6. The slide support 6 The connecting rods are connected so as to be slidable in the extending direction.

[0047] According to this configuration, the girder surface sensing bar 5 is connected to a pair of sliding supports 6 that are provided separately from the handrail 4, so even if the worker grasps the handrail 4 when ascending or descending, no load is placed on the girder surface sensing bar 5. This significantly improves the durability of the folding workbench 1 as a whole. Also, with this device, when unfolding or folding, the girder surface sensing bar 5 can be slid along the pair of sliding supports 6 that extend above the top plate 2, so the girder surface sensing bar 5 and sliding supports 6 will not swing in an unintended direction or at an unintended angle. Therefore, the correct This also allows for quick and smooth deployment and folding.

[0048] In addition, the girder surface sensing bar 5 is provided with a connector (connecting portion) 18 that connects to the slide support 6, and the connector 18 is connected to the slide support 6. The slide support 6 A groove portion (guide portion) 28 is provided for guiding along the extending direction.

[0049] According to this configuration, when unfolding or folding, the girder surface sensing bar 5 can be slid more smoothly in the extension direction of the slide support 6, thereby enabling more reliable and smooth unfolding and folding.

[0050] In addition, the slide support 6 is provided with a second locking mechanism (connecting and fixing part) 29 at its tip 6B, which is capable of fixing and holding the girder surface sensing bar 5 in both an unfolded state in which it is stood upright approximately at a right angle to the tabletop 2, and a folded state in which it is tilted approximately parallel to the tabletop 2.

[0051] According to this configuration, the second locking mechanism 29 provided at the tip 6B of the sliding support 6 allows the sliding support 6 to be connected and fixed to the girder surface sensing bar 5 in an unfolded state, or the sliding support 6 to be connected and fixed to the girder surface sensing bar 5 in a folded state, thereby enabling smoother and easier unfolding and folding.

[0052] The tabletop 2 also includes a gable sensing bar (gable side horizontal rail) 7 that is horizontally installed above the short edge 2S of the tabletop 2, and the girder sensing bars 5 are respectively installed above one and the other long edge 2L of the tabletop 2. The gable sensing bar 7 is configured such that a bent end portion (one end) 7A on one end side is pivotally connected to the girder sensing bar 5 on one side, and a bent end portion (other end) 7B on the other end side can be hooked and held to the girder sensing bar 5 on the other side. The gable sensing bar 7 is attached to the girder sensing bar 5 on the one side. The digit surface sensing bar 5 A recess (accommodating portion) 5S capable of accommodating is provided along the extending direction.

[0053] According to this configuration, the end surface sensing bar 7 can be accommodated in the recess 5S of the girder surface sensing bar 5 on one side along its extension direction by releasing the engagement state of the bent end portion 7B on the other end side with the girder surface sensing bar 5 on the other side and rotating it so that it overlaps with the girder surface sensing bar 5 on one side about the bent end portion 7A on one end side, so that the end surface sensing bar 7 can be prevented from getting caught on the top plate 2 or other parts when unfolding or folding. This allows for more reliable and smooth unfolding and folding.

[0054] In the above embodiment, the girder surface sensing bar 5 is slidably connected to the sliding support 6 by inserting and engaging the connector 18 provided on the girder surface sensing bar 5 into the groove 28 provided on the sliding support 6. However, as shown in Figure 22, the side end 5A of the girder surface sensing bar 5 may be provided with an approximately rectangular tubular or approximately C-shaped support holding portion 30 that can engage with the outer peripheral surface of the sliding support 6, and the girder surface sensing bar 5 may be slidably connected to the sliding support 6 by engaging this support holding portion 30 with the outer peripheral surface of the sliding support 6. [Explanation of symbols]

[0055] 1 Folding workbench 2. Tabletop 2L long edge 2S short edge 3. Main landing gear 4 Clue Stick 5. Beam surface sensing bar (beam side crosspiece) 5S Recess (receiving section) 6 Slide support (support) 6A Tip (tip of the support) 7 Gable side detection bar (gable side crosspiece) 7A Bent end on one end (one end of the gable side crosspiece) 7B: Bent end on the other end (other end of gable side crosspiece) 18 Connector (connection part) 24 Engagement hole (engaged part) 28 Groove (Guide) 29 Second lock mechanism (connection fixing part)

Claims

1. A folding workbench including a generally rectangular top plate, a main landing gear pivotally connected to the top plate and extending below the top plate, a handrail pivotally connected to the top plate or the main landing gear and extending above the main landing gear, and a girder-side horizontal rail horizontally disposed above a long edge of the top plate, A pair of support columns are pivotally connected to the long edge portion, extend above the tabletop, and are spaced apart from each other in the longitudinal direction of the tabletop, The girder side cross bar is a folding workbench slidably connected to the support in the extension direction of the support.

2. A connecting portion that connects to the support column is provided on the girder side cross beam, The folding workbench according to claim 1 , wherein the support pole is provided with a guide portion for guiding the connecting portion along an extension direction of the support pole.

3. 3. A folding workbench as described in claim 1 or 2, wherein the support pillar has a connecting and fixing portion at its tip that can fix and hold the girder side cross rail in both an unfolded state in which it stands up approximately perpendicular to the top plate, and a folded state in which it is tilted approximately parallel to the top plate.

4. A gable side crosspiece is provided at an upper position of the short edge portion of the top plate, The girder side cross beams are provided above one and the other long edge portions of the top plate, The gable side cross beam is pivotally connected at one end to the girder side cross beam on the one side, and the other end is configured to be hooked and held by the girder side cross beam on the other side, A folding workbench as described in any one of claims 1 to 3, wherein the girder side cross bar on one side is provided with a storage section capable of storing the gable side cross bar along the extension direction of the girder side cross bar.

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