JP7680307B2 - Safety rod device for workbench - Google Patents

Description

The present invention relates to a safety rod device that is configured to surround the work space above the top plate of a workbench with handrails erected near the four corners of the top plate.

In a conventional workbench with handrails erected near the four corners of a top plate having a first and second girder side edge in the longitudinal direction and a first and second girder 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 long rod and a second long rod along the first and second girder side edges and a first short rod and a second short rod along the first and second girder side edges, thereby ensuring the safety of the worker.

Patent No. 5412456 Patent No. 5443441

In the case of the safety rod device proposed in the above patent document, the longitudinal rod is formed by an extendable tube in which a thick tube, a medium tube, and a thin tube are connected in a telescopic manner so that they can slide freely within each other, 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. As a result, when the workbench is not in use, the longitudinal rod is stored in a folded state by rotating it downward in a contracted state to align with the handrail bar, and by rotating the handrail bar toward the bottom of the tabletop.

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 to which the long rod is not pivotally attached) and its tip is removably engaged and fixed to the other grab bar. As a result, 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 store it in a folded state.

However, this type of folding structure with a pivoted rod has the problem that the pivot and other components may be deformed when subjected to external forces such as collisions with foreign objects while the workbench is moving or in use, which can interfere with smooth folding and unfolding operations.

Therefore, from the standpoint of durability, it is desirable to configure the safety rod device so that it can be removed by making it easily attachable and detachable with a single touch, rather than pivotally attaching the rod to the handrail as in the patent document.

However, in this case, 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.

Therefore, the objective of the present invention is to provide a safety rod device that is configured so that rods removed from a handrail bar can be assembled and connected together.

Therefore, the first means of the present invention is a safety rod device that is configured 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, and that is configured of a first longitudinal rod and a second longitudinal rod that can be detached 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 has a locking claw that protrudes from the ventral surface that 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, and the first longitudinal rod and the second longitudinal rod have opposing connecting holes on the ventral surfaces, and when the ventral surfaces of the two longitudinal rods are stacked facing each other, the locking claw of one longitudinal rod is removably inserted and locked into the opposing connecting hole of the other longitudinal rod, thereby connecting the two longitudinal rods.

The second aspect of the present invention is a safety rod device comprising a workbench having handrails provided 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 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 first short rod and a second short rod that are detachable and connect the ends of the first longitudinal rod and the second longitudinal rod that are adjacent to the first end side edge and the second end side edge, and a latch device is provided at both ends of the first longitudinal rod and the second longitudinal rod, and a locking claw of the latch device is protruded from the belly surface that is the lower surface of the longitudinal rod, and the locking claw is configured to be detachably inserted and locked in a connecting hole provided at the top of the handrail, and a latch device is provided at both ends of the first short rod and the second short rod, The latch device is configured so that the locking claw protrudes from the underside of the short rod and is removably inserted and engaged into a rod connecting hole provided on the back surface, which is the upper surface opposite the ventral surfaces of the first and second longitudinal rods, and the first and second longitudinal rods are configured to have opposing connecting holes on their ventral surfaces , and when the ventral surfaces of the two 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 the two longitudinal rods; and further, the first and second longitudinal rods are provided on their outer peripheral surfaces other than the ventral surfaces with overlapping connecting holes for connecting the short rods in an overlapping state , and the first and second short rods are configured to be connected to at least one of the first and second longitudinal rods by inserting and engaging the locking claws of both rods removably into the overlapping connecting holes.

Furthermore, the present invention provides 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.

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 that have been removed from the handrail 8 can be assembled and connected together without using a separate jig or the like, so that the multiple rods are not dispersed.

1 is a perspective view showing a workbench provided with a safety rod device according to an embodiment of the present invention; FIG. 2 is a perspective view showing a state in which the short rods are removed from the long rods. FIG. 11 is a perspective view showing the state in which the longitudinal rod has been removed from the handrail bar. 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. FIG. 4 is a perspective view showing a latch device provided on a longitudinal rod in an exploded state. FIG. 4 is a perspective view showing a latch device provided on a short rod in an exploded state. 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 to remove it from the connecting hole. 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. 1 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. FIG. 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. 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. 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. 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. 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. 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. FIG. 11 is a perspective view showing a whole rod combination formed by assembling and combining a first short rod and a second short rod together with a longitudinal rod combination according to the second embodiment. FIG. 11 is a perspective view showing a third embodiment relating to a connecting hole and a connecting mode for assembling and connecting a short rod to a long rod. FIG. 13 is a perspective view showing a fourth embodiment relating to a connecting hole and a connecting mode for assembling and connecting a short rod to a long rod. FIG. 13 is a perspective view showing a fifth embodiment relating to a connecting hole and a connecting mode for assembling and connecting a short rod to a long rod.

A preferred embodiment of the present invention will be described in detail below with reference to the drawings.

(Work table 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 a first girder side edge 3a and a second girder side edge 3b, and both lateral sides in the lateral direction being a first end side edge 4a and a 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 positions between an extended 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 side of the top plate 2.

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 mechanism 9. This allows the handrail bars 8 to be changed 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 stored by following the leg body 4.

(Safety Rod Device)
The safety rod device 10 is composed of a first longitudinal rod 11a facing the first girder side edge 3a and detachably connecting adjacent handrail bars 8, 8, a second longitudinal rod 11b facing the second girder side edge 3b and detachably connecting adjacent handrail bars 8, 8, a first short rod 12a facing the first girder side edge 4a and detachably connecting the ends of the adjacent first longitudinal rod 11a and second longitudinal rod 11b, and a second short rod 12b facing the second girder side edge 4b and detachably connecting the ends of the adjacent first longitudinal rod 11a and second longitudinal rod 11b. These four rods surround the work space above the tabletop 2, preventing workers from falling and ensuring safety.

The short rods 12a, 12b are configured so that they can be removed 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 Figure 2.

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

To enable this 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.

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

As shown in FIG. 4, the latch devices 13 provided on the longitudinal rods 11a and 11b are configured so that the locking claws 13a protruding from the ventral surface 14a of the rods can be 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 underside of the rods can be removably inserted and locked into the rod connecting holes 17 provided on the back surfaces 14b of the longitudinal rods 11a and 11b.

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 resiliently biasing the swinging member 19 inside the housing 18. The swinging member 19 is provided with a locking claw 13a that protrudes from the underside of the housing 18 and an operating piece 13b that protrudes from the front surface of the housing 18.

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

As shown in FIG. 6, in the illustrated embodiment, the short rods 12a and 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 the housing 18 into the opening at the end of the sleeve 23, with the locking claw 13a protruding from a notch formed on the underside of the sleeve 23.

Figure 7 shows how the locking claws 13a of the latch device 13 provided at the ends of the longitudinal rods 11a and 11b are removably inserted and locked into the connecting holes 16 of the cap member 15 provided at the top of the handrail bar 8.

As shown, the swinging member 19 of the latch device 13 has an operating piece 13b protruding in the resilient direction of the spring 20, and the lower end of the downward leg 19a of the swinging 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 swinging member 19 is inserted between a pair of plate-like walls 18a, 18a suspended from the housing 18, and the locking claw 13a is configured to protrude to the side of the plate-like walls 18a, 18a.

As shown in FIG. 7(A), when connecting the ends of the longitudinal rods 11a, 11b to the top of the handrail bar 8, the plate-shaped walls 18a, 18a of the housing 18 are inserted into the connecting hole 16 to position the ends, and then 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, and causing the locking claw 13a to retreat between the plate-shaped walls 18a, 18a. This causes the ends of the longitudinal rods 11a, 11b to descend to a position where the plate-shaped walls 18a, 18a, 18a, together with the locking claw 13a, are completely inserted into the lower space of the connecting hole 16.

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 FIG. 7(B), causing the locking claw 13a to protrude again to the side of the plate-like walls 18a, 18a, and the locking claw 13a is locked to the lower edge of the connecting hole 16, creating a locking state that prevents it from coming loose.

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

When removing the ends of the longitudinal rods 11a and 11b from the handrail bar 8 from the above 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, causing the swinging member 19 to move against the spring 20, and the locking claw 13a is retracted to release the lock from the edge of the connecting hole 16, and the locking claw 13a can then be removed from the connecting hole 16 by lifting the ends of the longitudinal rods 11a and 11b.

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

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 and 12b and the connecting hole 16 provided on the back surface 14b at the end of the long rods 11a and 11b is the same as described above, so a description will be omitted.

(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.

As shown in Figures 9 and 10, the longitudinal rods 11a and 11b are provided with opposing connecting holes 24 located on the abdominal surface 14a from which the locking claws 13a protrude, and when the abdominal surfaces 14a, 14a are stacked facing each other, the locking claws 13a of one longitudinal rod 11a are inserted and engaged detachably into the opposing connecting holes 24 of the other longitudinal rod 11b, thereby connecting the two longitudinal rods 11a and 11b to form the longitudinal rod combination 10A.

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 are opposed to each other and butt against each other, so the abdominal surfaces 14a cannot be joined together. For this reason, as shown in FIG. 9, the first longitudinal rod 11a has a facing coupling hole 24a adjacent to the second end E2, and the second longitudinal rod 11b has a facing 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).

As a result, as shown in the figure, when the abdominal surfaces 14a, 14a of the longitudinal rods 11a, 11b are opposed to each other while being displaced 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.

Therefore, when each of the locking claws 13a is pushed in while facing the opposing connecting holes 24a, the locking claws 13a lock onto the edge of the opposing connecting holes 24a from the inside, and as shown in Figure 10, the longitudinal rod combination 10A is formed in which both longitudinal rods 11a and 11b are assembled and connected.

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 and 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, 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.

As a result, in addition to when the engaging claw 13a faces the opposing connecting hole 24a with the belly 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 is possible to insert and engage the engaging claw 13a of one longitudinal rod with another opposing connecting hole 24b of the other longitudinal rod, making it easier to align the longitudinal rods when forming the longitudinal rod combination 10A.

(Assembly and connection of short rods to long rod combination body)
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. The short rods 12a, 12b are preferably connected by inserting the locking claws 13a of the short rods into holes for locking, and for this purpose, overlapping connection holes 25 are provided in the long rods 11a, 11b.

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 with 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.

As described above, the longitudinal rods 11a and 11b have rod connection holes 17, 17 near both ends (first end E1, second end E2) on the back surface 14b. 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.

As shown in FIG. 11, the first longitudinal rod 11a and the second longitudinal rod 11b each have a first overlapping hole 25a at a position on the back surface 14b that is a distance L2 away from the first rod connecting hole 17a. Similarly, a second overlapping hole 25b is provided at a position that is a distance L2 away from the second rod connecting hole 17b. In this case, they are formed so that L1 = L2.

With this configuration, the longitudinal rods 11a, 11b are assembled and connected as described above to form the longitudinal rod combination 10A. 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 connection hole 17a and the first overlapping connection 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 connection hole 17b and the second overlapping connection hole 25b of the second longitudinal rod 11b, thereby forming the total rod combination 10B.

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.

In the second embodiment, the longitudinal rods 11a and 11b are assembled and joined to form the longitudinal rod combination 10A, and two short rods 12a and 12b are assembled and joined to one of the longitudinal rods 11a to form the total rod combination 10B.

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 connection 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 connection hole 17b and the second overlapping hole 25b of the first long rod 11a.

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.

In these embodiments, the long rods 11a, 11b are provided with a pair of overlapping connection holes 25 on the first side 14c and the second side 14d, respectively, 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.

In the case of the third embodiment shown in FIG. 17, the longitudinal rod combination 10A is 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.

In the case of the fourth embodiment shown in FIG. 18, the longitudinal rod combination 10A is 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 surface 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 surface 14c (the surface facing downward in the drawing) of the second longitudinal rod 11b, thereby forming the total rod combination 10B.

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.

(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 10B, but it is also possible to form only the long rod combination 10A by assembling and connecting two long rods 11a, 11b without forming the total rod combination 10B, or to assemble and connect only one of the short rods 12a, 12b to the long rod combination 10A.

1 Work platform 2 Top plate 3a First girder side edge 3b Second girder side edge 4a First girder side edge 4b Second girder side edge 5 Main landing gear 6 Leg body 7 Folding mechanism 8 Handrail 9 Raising mechanism 10 Safety rod device 10A Longitudinal rod connecting body 10B Full rod connecting body 11a First longitudinal rod 11b Second longitudinal rod 12a First short rod 12b Second short rod 13 Latch device 13a Locking claw 13b Operation piece 14a Abdominal surface 14b Back surface 14c First side surface 14d Second side surface 15 Cap member 16 Connection hole 17 Rod connecting hole 17a First rod connecting hole 17b Second rod connecting hole 18 Housing 18a Plate-shaped wall 19 Swinging member 19a Leg 19b Guide portion 20 Spring 21 Metal plate 22 Holder 23 Sleeves 24, 24a, 24b Opposing coupling holes 25 Polymer coupling holes 25a First polymer coupling holes 25b Second polymer coupling holes 25c, 25d Side polymer coupling holes

Claims (3)

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). 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) . 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 (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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