Safety rod device for workbench

Abstract

To provide a safety rod device in a workbench on which handhold bars are erected in the vicinity of four corners of a top plate, in which a work space on the top plate is surrounded by rods.SOLUTION: There is provided a safety rod device composed of a detachable first longitudinal rod (11a) and a second longitudinal rod (11b) connecting adjacent handhold bars facing a side edge of a top plate. Engaging claws (13a) of latch devices provided at both ends of both longitudinal rods are protruded from a ventral surface (14a) of the longitudinal rod, and the engaging claws (13a) are removably inserted and locked into a connecting hole (16) provided at the top of a handhold bar (8). Both longitudinal rods (11a) (11b) are provided with opposing coupling holes (24) on the ventral surface, and when detached from the handle bar (8), the engaging claw (13a) of one longitudinal rod is removably inserted and locked into the opposing coupling hole (24) of the other longitudinal rod, thereby coupling both longitudinal rods (11a) (11b).SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention relates to a safety rod device for a workbench having handrails erected near the four corners of the top plate, the device being configured so that the work space above the top plate is surrounded by rods. [Background technology]

[0002] Conventionally, in a workbench having handrails erected near the four corners of a top plate having a first girder side edge and a second girder side edge in the longitudinal direction and a first end side edge and a second end side edge in the lateral direction, a safety rod device is provided that surrounds the work space above the top plate by providing a first longitudinal rod and a second longitudinal rod along the first girder side edge and a first short rod and a second short rod along the first end side edge and a second end side edge, thereby ensuring the safety of the worker. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5412456 [Patent Document 2] Patent No. 5443441 Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of the safety rod device proposed in the above-mentioned patent document, the longitudinal rod is formed of an extendable tube in which a thick tube, a medium tube, and a thin tube are slidably connected in a nested manner, and the base end of the rod is pivotally attached to the upper end of one of the handrail bars, and the tip end of the extended rod is removably engaged and fixed to the other handrail bar. In this way, when the workbench is not in use, the longitudinal rod is rotated downward in a contracted state to align with the handrail bar, and the handrail bar is rotated downward toward the bottom of the tabletop to be stored in a folded state.

[0005] The short rod is configured so that its base end is pivotally attached to the upper end of one of the grab bars (the grab bar not pivotally attached to the long rod) and its tip end is removably engaged and fixed to the other grab bar. Thus, when the workbench is not in use, the short rod is rotated downward to align with the grab bar, and the grab bar is rotated downward toward the bottom of the tabletop to be stored in the folded state.

[0006] However, such a folding structure using a pivoted rod has the problem that when the workbench is subjected to external force, such as a collision with a foreign object while it is being moved or used, the pivot and other components may be deformed, which may hinder smooth folding and unfolding operation.

[0007] Therefore, from the viewpoint of durability, it is desirable to configure the safety rod device so that it can be removed by being easily attached and detached with a single touch, rather than pivotally attaching the rod to the handrail as in the patent document.

[0008] In this case, however, the removed rods are separate and independent, which makes them inconvenient to handle during transportation and storage, and there is a risk that some of the rods may get lost.

[0009] Therefore, an object of the present invention is to provide a safety rod device that is configured so that rods detached from a handrail bar can be assembled and connected together. [Means for solving the problem]

[0010] The first aspect of the present invention is a safety rod device that is configured as a safety rod device for a workbench having handrails installed in the vicinity of the four corners of a top plate having a first girder side edge and a second girder side edge in the longitudinal direction and a first end side edge and a second end side edge in the lateral direction, the safety rod device being configured of a first longitudinal rod and a second longitudinal rod that are detachable and connect adjacent handrails facing the first girder side edge and the second girder side edge, and a latch device is provided at both ends of the first longitudinal rod and the second longitudinal rod. The latch device is configured so that the locking claw protrudes from the ventral surface which is the underside of the longitudinal rod, and the locking claw is removably inserted and engaged into a connecting hole provided at the top of the handrail bar, and the first and second longitudinal rods have opposing connecting holes provided on their ventral surfaces, and when the ventral surfaces of both longitudinal rods are stacked opposite each other, the locking claw of one longitudinal rod is removably inserted and engaged into the opposing connecting hole of the other longitudinal rod, thereby connecting both longitudinal rods.

[0011] The second means of the present invention is a safety rod device for a workbench having handrails erected near the four corners of a top plate having a first girder side edge and a second girder side edge in the longitudinal direction and a first end side edge and a second end side edge in the lateral direction, the safety rod device being made up of first and second long rods that are detachable and connect adjacent handrails facing the first and second girder side edges, and first and second short rods that are detachable and connect the ends of the first and second long rods that are adjacent facing the first and second end side edges. a latch device is provided at both ends of the first longitudinal rod and the second longitudinal rod, the latch device has a locking claw protruding from the ventral surface which is the lower surface of the longitudinal rod, and the locking claw is removably inserted and locked into a connecting hole provided at the top of the handrail bar; a latch device is provided at both ends of the first short rod and the second short rod, the latch device has a locking claw protruding from the lower surface of the short rod, and the locking claw is removably inserted and locked into a rod connecting hole provided at the back surface which is the upper surface opposite to the ventral surface of the first longitudinal rod and the second longitudinal rod; It has been The first longitudinal rod and the second longitudinal rod have opposing coupling holes on the abdominal surface. Both longitudinal rodsWhen the abdominal surfaces of the two longitudinal rods are placed opposite each other, the locking claws of one longitudinal rod are removably inserted into and locked in the opposing connecting holes of the other longitudinal rod, thereby connecting the two longitudinal rods together; Furthermore, overlapping holes are provided on the outer peripheral surfaces of the first longitudinal rod and the second longitudinal rod other than the abdominal surfaces to overlap the short rods. The first short rod and the second short rod are configured to be connected to at least one of the first long rod and the second long rod by inserting and engaging the locking claws of both rods removably into the overlapping connecting holes.

[0012] Furthermore, the present invention is configured as a third means in that, while the second means is configured to insert and engage the locking claws of the short rod into overlapping connecting holes provided on the outer peripheral surfaces other than the ventral surfaces of the first longitudinal rod and the second longitudinal rod, the third means is configured to provide overlapping connecting holes on the ventral surfaces with a predetermined distance between them and the rod connecting holes, and to insert and engage the locking claws of the short rod into and into the overlapping connecting holes and the rod connecting holes so as to be freely inserted and removed. Effect of the Invention

[0013] According to the present invention, when the workbench 1 is not in use, the rods 11a, 11b, 12a, and 12b of the safety rod device 10 detached from the handrail 8 can be assembled and connected together so that the multiple rods are not dispersed, without using a separate jig or the like. [Brief description of the drawings]

[0014] [Figure 1] 1 is a perspective view showing a workbench provided with a safety rod device according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a perspective view showing a state in which the short rods are removed from the long rods. [Diagram 3] FIG. 11 is a perspective view showing the state in which the longitudinal rod has been removed from the handrail bar. [Figure 4] This is an oblique view showing a connecting hole provided in the handrail bar, a locking claw of a latch device provided at the end of a longitudinal rod, a superimposed coupling hole provided on the back surface of the longitudinal rod, and a locking claw of a latch device provided at the end of a short rod. [Diagram 5] FIG. 4 is a perspective view showing a latch device provided on a longitudinal rod in an exploded state. [Figure 6] FIG. 4 is a perspective view showing a latch device provided on a short rod in an exploded state. [Figure 7]The figure shows the operation of the latch device, where (A) is a cross-sectional view showing the state when the locking claw is inserted into the connecting hole, (B) is a cross-sectional view showing the inserted and locked state, and (C) is a cross-sectional view showing the state when the locking claw has been released so that it can be removed from the connecting hole. [Figure 8] Regarding the outer surface of the longitudinal rod, (A) is an oblique view with the back surface facing upward, (B) is an oblique view with the ventral surface facing upward, (C) is an oblique view with the first side surface facing upward, and (D) is an oblique view with the second side surface facing upward. [Figure 9] FIG. 2 is a perspective view of a state in which the ventral surfaces of a first longitudinal rod and a second longitudinal rod face each other. [Figure 10] 1 is a perspective view showing a longitudinal rod combination formed by assembling and connecting a first longitudinal rod and a second longitudinal rod together. FIG. [Figure 11] FIG. 2 is a perspective view showing a first embodiment relating to a coupling hole and a coupling mode for assembling and coupling a short rod to a long rod. [Figure 12] FIG. 11 is a perspective view showing a method of assembling and coupling a first short rod and a second short rod to a longitudinal rod combination body according to the first embodiment. [Figure 13] FIG. 1 is a perspective view showing a total rod combination formed by assembling and connecting a first short rod and a second short rod to a longitudinal rod combination according to the first embodiment. [Figure 14] FIG. 11 is a perspective view showing a second embodiment relating to a coupling hole and a coupling mode for assembling and coupling a short rod to a long rod. [Figure 15] FIG. 11 is a perspective view showing a method of assembling and coupling a first short rod and a second short rod to a longitudinal rod combination body according to the second embodiment. [Figure 16] FIG. 11 is a perspective view showing a whole rod combination formed by assembling and connecting a first short rod and a second short rod to a longitudinal rod combination according to the second embodiment. [Figure 17] FIG. 11 is a perspective view showing a third embodiment relating to a coupling hole and a coupling mode for assembling and coupling a short rod to a long rod. [Figure 18]FIG. 13 is a perspective view showing a fourth embodiment relating to a coupling hole and a coupling mode for assembling and coupling a short rod to a long rod. [Figure 19] FIG. 13 is a perspective view showing a fifth embodiment relating to a coupling hole and a coupling mode for assembling and coupling a short rod to a long rod. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0016] (Workbench configuration) As shown in Figures 1 to 3, the workbench 1 has a substantially rectangular top plate 2, with both longitudinal sides of the top plate 2 being the first girder side edge 3a and the second girder side edge 3b, and both lateral sides in the lateral direction being the first end side edge 4a and the second end side edge 4b, with main legs 5, 5 provided facing the end side edges. Although not shown in detail, each main leg 5 is configured in a ladder shape with steps installed between a pair of legs 6, 6, and each leg 6 is pivotally connected to the four corners of the top plate 2 via a folding mechanism 7. As a result, both main legs 5, 5 are configured to be able to change their position between a deployed position supported outward from the end side edge of the top plate 2 as shown in the figures, and a stored position (not shown) rotated toward the bottom of the top plate 2.

[0017] A total of four handrail bars 8 are erected near the four corners of the tabletop 2, and the lower ends of each of the handrail bars 8 are attached to the outer surface of the leg body 6 via a raising and lowering mechanism 9. As a result, the handrail bars 8 are configured to be able to change their position between an upright position in which they are erected upward as shown in the figure, and a stored position (not shown) in which they are rotated downward and aligned with the outer surface of the leg body 4. Therefore, when the main legs 5 are rotated toward the underside of the tabletop 2 to assume the stored position, the handrail bars 8 that have rotated downward can be made to follow the leg body 4 and be stored.

[0018] (Safety rod device) The safety rod device 10 is composed of a first long rod 11a that faces the first girder side edge 3a and detachably connects adjacent handrail bars 8, 8, a second long rod 11b that faces the second girder side edge 3b and detachably connects adjacent handrail bars 8, 8, a first short rod 12a that faces the first end side edge 4a and detachably connects the ends of the first long rod 11a and the second long rod 11b that are adjacent to each other, and a second short rod 12b that faces the second end side edge 4b ​​and detachably connects the ends of the first long rod 11a and the second long rod 11b that are adjacent to each other.These four rods surround the work space above the tabletop 2, preventing workers from falling and ensuring safety.

[0019] The short rods 12a, 12b are configured so that they can be detached from the long rods 11a, 11b with a single touch when an operator climbs onto or descends from the tabletop 2 via the main legs 5, as shown in FIG.

[0020] The longitudinal rods 11a, 11b are configured so that they can be detached from the handrail 8 with a single touch when the workbench 1 is not in use.

[0021] To enable such one-touch attachment and detachment, latch devices 13 are provided at both ends of the long rods 11a and 11b and at both ends of the short rods 12a and 12b. In the illustrated embodiment, a total of eight latch devices 13 are of the same configuration.

[0022] The longitudinal rods 11a, 11b are formed from metal square pipe material such as aluminum, and have four flat surfaces on their outer circumferential surfaces. For ease of explanation, the lower surface is referred to as the belly surface 14a, the upper surface as the back surface 14b, one of the two side surfaces as the first side surface 14c, and the other as the second side surface 14d, as shown in FIG. 8, and will be described below.

[0023] 4, the latch devices 13 provided on the long rods 11a and 11b are configured so that the locking claws 13a protruding from the abdominal surface 14a of the rods are removably inserted and locked into the connecting holes 16 of the hollow cap member 15 provided at the top of the handrail 8. The latch devices 13 provided on the short rods 12a and 12b are configured so that the locking claws 13a protruding from the lower surfaces of the rods are removably inserted and locked into the rod connecting holes 17 provided on the back surfaces 14b of the long rods 11a and 11b.

[0024] As shown in Figures 5 and 6, the latch device 13 is composed of a housing 18, a swinging member 19 inserted into the housing 18, and a spring 20 that controls the swinging motion by elastically biasing the swinging member 19 inside the housing 18. The swinging member 19 is provided with a locking claw 13a protruding from the underside of the housing 18 and an operating piece 13b protruding from the front side of the housing 18.

[0025] As shown in FIG. 5, with respect to the longitudinal rods 11a, 11b, the latch device 13 is attached by inserting and fixing a housing 18 into the opening at the end of the rod, with the locking claw 13a protruding from a notch formed in the ventral surface 14a at the end of the rod.

[0026] As shown in Figure 6, in the illustrated embodiment, the short rods 12a, 12b are configured with a rectangular cylindrical sleeve 23 fixed to the ends of a pair of upper and lower metal plates 21 via retainers 22, and the latch device 13 is attached by inserting and fixing a housing 18 into the opening at the end of the sleeve 23, with the locking claw 13a protruding from a notch formed in the underside of the sleeve 23.

[0027] FIG. 7 shows a method for removably inserting and locking the locking claws 13a of the latch device 13 provided at the ends of the longitudinal rods 11a and 11b into the connecting holes 16 of the cap member 15 provided at the top of the handrail bar 8.

[0028] As shown in the figure, the swing member 19 of the latch device 13 has an operation piece 13b protruding in the resilient direction of the spring 20, and the lower end of the downward leg 19a of the swing member 19 protrudes in the resilient direction to form the locking claw 13a, and a tapered guide portion 19b is provided on the lower edge of the locking claw 13a. In the illustrated embodiment, the leg 19a of the swing member 19 is inserted between a pair of plate-like walls 18a, 18a vertically attached to the housing 18, and the locking claw 13a is configured to protrude laterally from the plate-like walls 18a, 18a.

[0029] As shown in Fig. 7(A), when connecting the ends of the longitudinal rods 11a, 11b to the top of the handrail bar 8, in a state where the plate-like walls 18a, 18a of the housing 18 are inserted into the connecting hole 16 to position them, a downward force is applied to the ends of the longitudinal rods 11a, 11b as shown by the arrow in the figure. This causes the guide portion 19b of the locking claw 13a to be pushed along the edge of the connecting hole 16, causing the swinging member 19 to swing against the spring 20 as shown in the figure, and causing the locking claw 13a to retreat between the plate-like walls 18a, 18a. This causes the ends of the longitudinal rods 11a, 11b to descend to a position where the plate-like walls 18a, 18a, 18a together with the locking claw 13a are completely inserted into the lower space of the connecting hole 16.

[0030] As soon as the locking claw 13a reaches the space below the connecting hole 16, the spring 20 returns the oscillating member 19 to its original position, as shown in Figure 7 (B), thereby causing the locking claw 13a to protrude laterally from the plate-like walls 18a, 18a again, and by engaging with the lower edge of the connecting hole 16, a locking state is formed to prevent it from coming loose.

[0031] In this way, the operation for connecting the ends of the longitudinal rods 11a, 11b to the top of the handrail bar 8 can be performed with a single touch.

[0032] When removing the ends of the longitudinal rods 11a, 11b from the handrail bar 8 from the above-mentioned connected state, as shown in Figure 7 (C), the operating piece 13b of the latch device 13 is pushed toward the inside of the housing 18, whereby the oscillating member 19 moves against the spring 20, causing the locking claw 13a to retract and thereby release the locking from the edge of the connecting hole 16. Then, the ends of the longitudinal rods 11a, 11b can be lifted to remove the locking claw 13a from the connecting hole 16.

[0033] In this way, the operation of removing the ends of the longitudinal rods 11a, 11b from the top of the handrail bar 8 can also be performed with a single touch.

[0034] Although not shown in the figure, the method and function of attachment and detachment between the latch device 13 provided at the end of the short rods 12a, 12b and the connecting hole 16 provided in the back surface 14b at the end of the long rods 11a, 11b is the same as described above, so explanation will be omitted.

[0035] (Assembly and connection of the longitudinal rod when not in use) When the workbench 1 is not in use, the two longitudinal rods 11a, 11b removed from the handrail 8 can be assembled and connected together without using a separate jig such as a cable tie.

[0036] As shown in Figures 9 and 10, the longitudinal rods 11a, 11b are provided with opposing connecting holes 24 located on the ventral surface 14a from which the locking claws 13a protrude, and when the ventral surfaces 14a, 14a are stacked opposite each other, the locking claws 13a of one longitudinal rod 11a are inserted and engaged in the opposing connecting holes 24 of the other longitudinal rod 11b in a freely insertable and detachable manner, thereby connecting both longitudinal rods 11a, 11b to form a longitudinal rod combination 10A.

[0037] When the abdominal surface 14a of the first longitudinal rod 11a and the abdominal surface 14a of the second longitudinal rod 11b are opposed to each other over their entire length, the engaging claws 13a, 13a face each other and butt against each other, so that the abdominal surfaces 14a cannot be joined together. For this reason, as shown in Fig. 9, the first longitudinal rod 11a has an opposed coupling hole 24a adjacent to the second end E2, and the second longitudinal rod 11b has an opposed coupling hole 24a adjacent to the first end E1, at both ends of each longitudinal rod 11a, 11b, that is, the first end E1 (the end where the housing 18 of the latch device 13 is installed on the side where the first short rod 12a is supported) and the second end E2 (the end where the housing 18 of the latch device 13 is installed on the side where the second short rod 12b is supported).

[0038] As a result, as shown in the figure, when the ventral surfaces 14a, 14a of the longitudinal rods 11a, 11b are opposed to each other while being shifted in position in the longitudinal direction, the locking claw 13a provided on the first end E1 of the first longitudinal rod 11a faces the opposing connecting hole 24a of the second longitudinal rod 11b, and the locking claw 13a provided on the second end E2 of the second longitudinal rod 11b faces the opposing connecting hole 24a of the first longitudinal rod 11a.

[0039] Therefore, when each locking claw 13a is pushed in while facing the opposing connecting hole 24a, the locking claw 13a locks into the edge of the opposing connecting hole 24a from inside, and a longitudinal rod combination body 10A is formed in which both longitudinal rods 11a, 11b are assembled and connected, as shown in Figure 10.

[0040] In the illustrated embodiment, in addition to the above-mentioned opposing coupling holes 24a, another opposing coupling hole 24b is provided adjacent to both the first end E1 and the second end E2 of the longitudinal rods 11a, 11b. That is, in addition to the opposing coupling hole 24a provided adjacent to the second end E2 of the first longitudinal rod 11a, another opposing coupling hole 24b is provided adjacent to the first end E1 of the first longitudinal rod 11a, and similarly, in addition to the opposing coupling hole 24a provided adjacent to the first end E1 of the second longitudinal rod 11b, another opposing coupling hole 24b is provided adjacent to the second end E2 of the second longitudinal rod 11b.

[0041] As a result, in addition to the case where the locking claw 13a is opposed to the opposing connecting hole 24a with the ventral surfaces 14a, 14a of the longitudinal rods 11a, 11b shifted in position in the longitudinal direction as shown in Figure 9, even when one of the longitudinal rods is inverted (with the first end E1 and the second end E2 facing in opposite directions), it becomes possible to insert and lock the locking claw 13a of one longitudinal rod in opposition to another opposing connecting hole 24b of the other longitudinal rod, making it easier to align the positions when forming the longitudinal rod combination 10A.

[0042] (Assembly and connection of short rods to long rod assembly) The long rod combination 10A formed as described above is further configured to be able to form a full rod combination 10B by assembling and connecting two short rods 12a, 12b. It is preferable that the short rods 12a, 12b are assembled and connected by inserting the locking claws 13a of the short rods into holes for locking, and therefore overlapping connection holes 25 are provided in the long rods 11a, 11b.

[0043] (First embodiment) 11 to 13 show a first embodiment of the structure for forming the total rod combination 10B, which is structured so that the short rods 12a, 12b are assembled and combined to the back surface 14b of the long rods 11a, 11b. At this time, the locking claws 13a, 13a protruding from the undersides of both ends of the short rods 12a, 12b are spaced apart by a distance L1.

[0044] As described above, the longitudinal rods 11a and 11b have rod connection holes 17, 17 provided on the back surface 14b near both ends (first end E1, second end E2). In Fig. 11, a first rod connection hole 17a for inserting and locking the locking claw 13a of the first short rod 12a is provided near the first end E1 of the longitudinal rods 11a and 11b, and a second rod connection hole 17b for inserting and locking the locking claw 13a of the second short rod 12b is provided near the second end E2.

[0045] 11, the first longitudinal rod 11a and the second longitudinal rod 11b are provided with a first overlapping hole 25a at a position spaced apart by a distance L2 from the first rod connecting hole 17a on the back surface 14b. Similarly, the second overlapping hole 25b is provided at a position spaced apart by a distance L2 from the second rod connecting hole 17b. In this case, the rods are formed so that L1=L2.

[0046] With this configuration, the longitudinal rods 11a, 11b are assembled and connected as described above to form the longitudinal rod combination body 10A, and then, as shown in Figures 12 and 13, the locking claws 13a, 13a at both ends of the first short rod 12a are inserted and locked into the first rod connecting hole 17a and the first overlapping connecting hole 25a of the first longitudinal rod 11a, and the locking claws 13a, 13a at both ends of the second short rod 12b are inserted and locked into the second rod connecting hole 17b and the second overlapping connecting hole 25b of the second longitudinal rod 11b, thereby forming the total rod combination body 10B.

[0047] Second embodiment 14 to 16 show a second embodiment relating to a configuration for forming a total rod combination body 10B, in which the rod connection hole 17 and the overlapping combination hole 25 are configured in the same manner as in the first embodiment.

[0048] In the second embodiment, a total rod combination 10B is formed by assembling and connecting two short rods 12a, 12b to one of the longitudinal rods 11a, which is a longitudinal rod combination 10A formed by assembling and connecting longitudinal rods 11a, 11b.

[0049] In the illustrated example, the first short rod 12a has the locking claws 13a, 13a at both ends inserted and locked into the first rod connecting hole 17a and the first overlapping hole 25a of the first long rod 11a. The second short rod 12b has the locking claws 13a, 13a at both ends inserted and locked into the second rod connecting hole 17b and the second overlapping hole 25b of the first long rod 11a.

[0050] (Other embodiments) Regarding the configuration for forming the whole rod combination body 10B, FIG. 17 shows a third embodiment, FIG. 18 shows a fourth embodiment, and FIG. 19 shows a fifth embodiment.

[0051] In these embodiments, the long rods 11a, 11b are provided on the first side surface 14c and the second side surface 14d with a pair of overlapping connection holes 25 for inserting and locking the locking claws 13a, 13a at both ends of the short rods 12a, 12b. That is, a pair of side overlapping connection holes 25c, 25c for inserting and locking the locking claws 13a, 13a of the first short rod 12a and a pair of side overlapping connection holes 25d, 25d for inserting and locking the locking claws 13a, 13a of the second short rod 12b are provided.

[0052] In the third embodiment shown in Figure 17, in the longitudinal rod combination 10A formed by assembling and connecting the longitudinal rods 11a and 11b, the first short rod 12a has its locking claws 13a, 13a inserted and locked into the side overlapping connection holes 25c, 25c provided on the first side 14c of the first longitudinal rod 11a, and the second short rod 12b has its locking claws 13a, 13a inserted and locked into the side overlapping connection holes 25d, 25d provided on the second side 14d of the second longitudinal rod 11b, thereby forming the total rod combination 10B.

[0053] In the fourth embodiment shown in Figure 18, the longitudinal rod combination 10A is formed by assembling and connecting the longitudinal rods 11a and 11b, and the first short rod 12a has its locking claws 13a, 13a inserted and locked into the side overlapping connection holes 25c, 25c provided on the first side 14c of the first longitudinal rod 11a, and the second short rod 12b has its locking claws 13a, 13a inserted and locked into the side overlapping connection holes 25d, 25d provided on the first side 14c (the downward surface in the drawing) of the second longitudinal rod 11b, thereby forming the total rod combination 10B.

[0054] In the case of the fifth embodiment shown in Fig. 19, the first short rod 12a and the second short rod 12b are connected to one of the longitudinal rods (the first longitudinal rod 11a in the illustrated example) in the longitudinal rod combination 10A formed by assembling and connecting the longitudinal rods 11a and 11b. That is, the first short rod 12a has the locking claws 13a, 13a inserted and locked into the side overlapping connection holes 25c, 25c on the first side surface 14c of the first longitudinal rod 11a, and the second short rod 12b is inserted and locked into the side overlapping connection holes 25d, 25d on the same first side surface 14c, thereby forming the total rod combination 10B.

[0055] (Configuration of the present invention) The present invention is not limited to the illustrated embodiment, and it is possible to select characteristic configurations. When the workbench 1 is not used, the safety rod device 10 is most preferably formed by assembling and connecting four rods, the long rods 11a, 11b and the short rods 12a, 12b, as in the above embodiment, to form a total rod combination body 10B, but it is also possible to form only the long rod combination body 10A by assembling and connecting two long rods 11a, 11b without forming the total rod combination body 10B, or to assemble and connect only one of the short rods 12a, 12b to the long rod combination body 10A. [Explanation of symbols]

[0056] 1 Workbench 2. Tabletop 3a 1st digit side edge 3b 2nd digit side edge 4a First gable side edge 4b Second gable side edge 5 Main landing gear six legged body 7 Folding mechanism 8 Clue Stick 9 Raising mechanism 10 Safety rod device 10A Longitudinal Rod Combination 10B All rods combined 11a First longitudinal rod 11b Second longitudinal rod 12a First short rod 12b 2nd short rod 13 Latching device 13a Locking claw 13b Operation piece 14a ventral surface 14b Back 14c 1st side 14d 2nd side 15 Cap member 16 Connection hole 17 Rod connection hole 17a First rod connection hole 17b Second rod connection hole 18 Housing 18a Plate Wall 19 Swinging member 19a Legs 19b Guide part 20 Spring 21 Metal plate 22 Holder 23 Sleeve 24, 24a, 24b Opposing binding holes 25 Polymerization bond pore 25a 1st polymerization bond hole 25b Second polymerization bond hole 25c, 25d Side polymerization bonding hole

Claims

1. A safety rod device is provided for a workbench having handrails provided in the vicinity of four corners of a top plate having a first girder side edge and a second girder side edge in a longitudinal direction and a first end side edge and a second end side edge in a lateral direction, the safety rod device being constituted by a first longitudinal rod (11a) and a second longitudinal rod (11b) which are detachable and connect adjacent handrails facing the first girder side edge and the second girder side edge, A latch device (13) is provided at both ends of the first longitudinal rod (11a) and the second longitudinal rod (11b), and a locking claw (13a) of the latch device is protruded from a bottom surface (14a) of the longitudinal rod, and the locking claw (13a) is configured to be removably inserted into and locked in a connecting hole (16) provided at the top of the handrail bar (8); The first longitudinal rod (11a) and the second longitudinal rod (11b) have opposing connecting holes (24) on their ventral surfaces, and when the ventral surfaces (14a) of the two longitudinal rods are placed opposite each other and overlapped, the engaging claws (13a) of one longitudinal rod are removably inserted and engaged into the opposing connecting holes (24) of the other longitudinal rod, thereby connecting the two longitudinal rods (11a) and (11b).

2. A workbench has handrails erected near the four corners of a top plate having a first girder side edge and a second girder side edge in the longitudinal direction and a first end side edge and a second end side edge in the lateral direction, and the safety rod device is composed of a first longitudinal rod (11a) and a second longitudinal rod (11b) that are detachable and connect adjacent handrails facing the first girder side edge and the second girder side edge, and a first short rod (12a) and a second short rod (12b) that are detachable and connect the ends of the first longitudinal rod and the second longitudinal rod that are adjacent to each other facing the first end side edge and the second end side edge, A latch device (13) is provided at both ends of the first longitudinal rod (11a) and the second longitudinal rod (11b), and a locking claw (13a) of the latch device is protruded from a bottom surface (14a) of the longitudinal rod, and the locking claw (13a) is configured to be removably inserted into and locked in a connecting hole (16) provided at the top of the handrail bar (8); A latch device (13) is provided at both ends of the first short rod (12a) and the second short rod (12b), and a locking claw (13a) of the latch device is made to protrude from the lower surface of the short rod, and the locking claw (13a) is configured to be removably inserted and locked into a rod connection hole (17) provided in a back surface (14b) which is the upper surface opposite to the abdominal surface of the first long rod (11a) and the second long rod (11b), The first longitudinal rod (11a) and the second longitudinal rod (11b) are provided with opposing coupling holes (24) on their abdominal surfaces, and when the abdominal surfaces (14a) of both longitudinal rods are placed opposite each other and overlapped, the locking claws (13a) of one longitudinal rod are detachably inserted into and locked in the opposing coupling holes (24) of the other longitudinal rod, thereby coupling both longitudinal rods (11a) and (11b); Furthermore, overlapping connection holes (25c, 25d) for connecting the short rods in an overlapping state are provided on the outer peripheral surfaces of the first longitudinal rod (11a) and the second longitudinal rod (11b) other than the abdominal surface (14a), A safety rod device for a workbench, characterized in that the first short rod (12a) and the second short rod (12b) are configured to be connected to at least one of the first long rod and the second long rod by inserting and engaging the locking claws (13a) of both rods into and removably engaging the overlapping connecting holes (25c, 25d).

3. A safety rod device in a workbench having handrails erected near the four corners of a top plate having a first girder side edge and a second girder side edge in the longitudinal direction and a first girder side edge and a second girder side edge in the lateral direction, the safety rod device being composed of a first longitudinal rod (11a) and a second longitudinal rod (11b) which are detachable and connect adjacent handrails facing the first girder side edge and the second girder side edge, and a first short rod (12a) and a second short rod (12b) which are detachable and connect the ends of the first longitudinal rod and the second longitudinal rod which are adjacent facing the first girder side edge and the second girder side edge, A latch device (13) is provided at both ends of the first longitudinal rod (11a) and the second longitudinal rod (11b), and a locking claw (13a) of the latch device is protruded from a bottom surface (14a) of the longitudinal rod, and the locking claw (13a) is configured to be removably inserted into and locked in a connecting hole (16) provided at the top of the handrail bar (8); A latch device (13) is provided at both ends of the first short rod (12a) and the second short rod (12b), and a locking claw (13a) of the latch device is made to protrude from the lower surface of the short rod, and the locking claw (13a) is configured to be removably inserted and locked into a rod connection hole (17) provided in a back surface (14b) which is the upper surface opposite to the abdominal surface of the first long rod (11a) and the second long rod (11b), The first longitudinal rod (11a) and the second longitudinal rod (11b) are provided with opposing coupling holes (24) on their abdominal surfaces, and when the abdominal surfaces (14a) of both longitudinal rods are placed opposite each other and overlapped, the locking claws (13a) of one longitudinal rod are detachably inserted into and locked in the opposing coupling holes (24) of the other longitudinal rod, thereby coupling both longitudinal rods (11a) and (11b); Furthermore, overlapping connection holes (25a, 25b) are provided in the abdominal surfaces (14a) of the first longitudinal rod (11a) and the second longitudinal rod (11b) at a predetermined interval between the rod connection holes (17), A safety rod device for a workbench, characterized in that the locking claws (13a, 13a) of the latch device (13) at both ends of the first short rod (12a) and the second short rod (12b) are configured to be removably inserted and locked into the overlapping coupling holes (25a, 25b) and the rod connecting hole (17), respectively.

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