Clamping device

Abstract

To provide a clamp device capable of surely supporting a support member on a pair of locking members.SOLUTION: A clamp device has a clamp member 41 capable of being locked with each of a pair of locking members 2a, and the pair of clamp members 41 have rising parts 42 extending upward from a base end part provided on the support member, and locking claws 43 formed in a direction approaching each other from the rising parts 42 and provided so as to surround the locking members; a hydraulic jack 49 is provided as fixing / releasing means for fixing or releasing the locking claw 43 to or from the pair of locking members 2a depending on the presence or absence of a gap between the pair of locking members 2a and the locking claw 43.SELECTED DRAWING: Figure 22

Description

Technical Field

[0001] The present invention relates to a clamp device installed in a moving device such as a mobile scaffold device used for various operations in structures such as bridges, elevated roads or elevated railways, power plants, etc.

Background Art

[0002] Conventionally, mobile scaffold devices used for various operations in structures include, for example, those described in Patent Documents 1 and 2. When moving a scaffold along a hanger rail, if there are obstacles to movement, the beam member forming the scaffold is split left and right to move while crossing the obstacle, and after crossing the obstacle, the beam members are connected and the scaffold is moved again along the hanger rail.

[0003] Also, the scaffold device described in Patent Document 2 suspends the scaffold body by sandwiching the flange portion of the bridge with upper and lower rotational movement means, moves it by the rotational force of the lower rotational movement means, and stops the movement at the attachment plate, bolts of the bridge girder joint portion, or at the location where a lateral girder is connected to the bridge girder, etc. Then, the upper rotational movement means is switched to a non-moving position, and after passing through the above-mentioned location, the upper rotational movement means is switched to a moving position to move.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] <舍 Incidentally, in the mobile scaffolding device described in Patent Document 1, when the upper traveling section travels along the hanger rail, and in the scaffolding device described in Patent Document 2, when the scaffolding body is suspended and moved by clamping the flange section with upper and lower rotating moving means, it was desired that the traveling section or rotating moving means be reliably supported on the hanger rail or flange section.

[0006] Therefore, the object of the present invention is to provide a clamping device that can reliably support a support member with a pair of locking members. [Means for solving the problem]

[0007] To achieve this objective, the invention described in claim 1 provides a pair of locking members on the underside of the lower surface of the structure. (2a) These locking members are installed. (2a) to The first support member (17) is supported via a pair of first clamp members (31). Clamping device (30) and the pair First Clamp member (31) teeth, The first Support member (17) Upright portion extending upward from the base end provided therein (32) And these upright parts (32) They are formed in a direction that brings them closer to each other, and the a pair Locking member (2a) A latching claw is provided to surround it. The first support member (17) is provided with a lifting means (49) for raising or lowering the first support member (17), the lifting means (49) raises the first support member (17) relative to the pair of locking members (2a) to create a gap between the locking claw (33) and the upper surfaces of the pair of locking members (2a) thereby releasing the locking state of the locking claw (33) and making the first support member (17) movable in the longitudinal direction of the pair of locking members (2a), the lifting means (49) lowers the first support member (17) relative to the pair of locking members (2a) to eliminate the gap between the locking claw (33) and the upper surfaces of the pair of locking members (2a) and bring them into contact, thereby locking the locking claw (33) and preventing the first support member (17) from moving in the longitudinal direction of the pair of locking members (2a). It is characterized by being configured in such a way.

[0008] Furthermore, the invention described in claim 2 includes a pair of locking members on the underside of the lower surface of the structure. (2a) These locking members are installed. (2a) The second support member (12) is supported by a pair of second clamp members (41). Clamping device (40) and the pair The second clamp member (41) has an upright portion (42) extending upward from a base end provided on the second support member (12), a locking claw (43) formed in a direction approaching each other from these upright portions (42) and provided to surround the pair of locking members (2a), and a jack member (49) provided on the locking claw (43) to raise or lower the second support member (12), and the jack member (49) drives the jack member (49) while the second support member (12) is movably supported relative to the pair of locking members (2a) by the support means (17, 30) to lock the pair of locking members (2 A gap is created with respect to the upper surface of (a) to release the locking state of the locking claw (43), making the second support member (12) movable in the longitudinal direction of the pair of locking members (2a). The jack member (49) is driven while the second support member (12) is supported by the support means (17, 30) so as to be movable with respect to the pair of locking members (2a), eliminating the gap between the locking claw (43) and the upper surfaces of the pair of locking members (2a) and causing them to come into contact, thereby locking the locking claw (43) and preventing the second support member (12) from moving in the longitudinal direction of the pair of locking members (2a). It is characterized by being configured in such a way.

[0009] Furthermore, the invention described in claim 3, in addition to the configuration described in claim 1 or 2, The device is equipped with drive means (34, 44) that drive the locking claws (33, 43) so that they can slide toward and toward each other. When the drive means (34, 44) is driven to slide the locking claws (33, 43) toward each other, the locking claws (33, 43) move to a position above the pair of locking members (2a). When the drive means (34, 44) is driven to slide the locking claws (33, 43) toward each other, the locking claws (33, 43) move to a position separated from the pair of locking members (2a). It is characterized by the following.

[0010] In addition, the invention according to claim 4, in addition to the configuration according to claim 1 or 2, the pair of locking members (2a) is Each is formed at the bottom of the H-shaped steel characterized by being a horizontal flange.

[0011] In addition, the invention according to claim 5, in addition to the configuration according to claim 1 or 2 is It is characterized by horizontal flanges of L-shaped steel that are spaced apart from each other. Furthermore, the invention described in claim 6 is characterized in that, in addition to the configuration described in claim 3, the driving means (34, 44) includes a ball screw (35, 45) that is screwed into and penetrates the base end of the clamp member (31, 41) and has right-hand and left-hand threads formed coaxially, and a motor (36, 46) that rotates the ball screw (35, 45) in the forward and reverse directions, and the motor (36, 46) rotates the ball screw (35, 45) in the forward or reverse direction, and when rotated in the forward direction the locking claws (33, 43) move closer to each other, while when rotated in the reverse direction the locking claws (33, 43) move further apart from each other.

Advantages of the Invention

[0012] According to the invention described in claim 1, The lifting means (49) raises the first support member (17) relative to the pair of locking members (2a), creating a gap between the locking claw (33) and the upper surfaces of the pair of locking members (2a), thereby releasing the locking state of the locking claw (33) and allowing the first support member (17) to move in the longitudinal direction of the pair of locking members (2a). The lifting means (49) then lowers the first support member (17) relative to the pair of locking members (2a), eliminating the gap between the locking claw (33) and the upper surfaces of the pair of locking members (2a) and bringing them into contact, thereby locking the locking claw (33) and preventing the first support member (17) from moving in the longitudinal direction of the pair of locking members (2a). since it is configured as such, the support member can be reliably supported by the pair of locking members. According to the invention described in claim 2, the jack member (49) is driven while the second support member (12) is movably supported by the support means (17, 30) with respect to the pair of locking members (2a), thereby creating a gap with respect to the upper surface of the pair of locking members (2a) and releasing the locking state of the locking claw (43), thereby making the second support member (12) movable in the longitudinal direction of the pair of locking members (2a), and the jack member (49) is driven by the second support member (12) The support member (12) is configured to be securely supported by the support means (17, 30) with respect to a pair of locking members (2a). By driving the jack member (49) while the support member (12) is movably supported with respect to a pair of locking members (2a), the gap between the locking claw (43) and the upper surfaces of the pair of locking members (2a) is eliminated and brought into contact, causing the locking claw (43) to lock. This prevents the support member (12) from moving in the longitudinal direction of the pair of locking members (2a), thereby ensuring that the support member is securely supported by the pair of locking members.

[0013] In addition, according to the invention described in claim 3 when the driving means is driven to slide the latching claws in a direction approaching each other, these latching claws move to a position above the pair of locking members, while when the driving means is driven to slide the latching claws in a direction away from each other, these latching claws move to a position separated from the pair of locking members. Since it is configured as such, the support member can be reliably supported by the pair of locking members.

[0014] In addition, according to the invention described in claim 4 since the pair of locking members are horizontal flanges formed at the lower part of the H-shaped steel respectively, the support member can be reliably supported.

[0015] In addition, according to the invention described in claim 5 since the pair of locking members are horizontal flanges of L-shaped steel separated from each other, even if the locking members are L-shaped steel, the support member can be reliably supported, and the versatility can be enhanced.

[0016] Furthermore, claims 6 According to the invention described above, the ball screw is rotated by a motor in the forward or reverse direction, and the locking claws move closer together when rotated in the forward direction, while they move further apart when rotated in the reverse direction. Therefore, the locking claws can be brought closer together or further apart by a single motor, which simplifies the structure and improves operability. [Brief explanation of the drawing]

[0017] [Figure 1] This is a perspective view showing the overall structure of a mobile scaffolding device to which an embodiment of the clamping device according to the present invention is applied. [Figure 2] This is a perspective view showing scaffolding assembly procedure 1 using an embodiment of the clamping device according to the present invention. [Figure 3] This is a perspective view showing a procedure 2 for assembling a suspended scaffold using an embodiment of the clamping device according to the present invention. [Figure 4] This is a perspective view showing a procedure 3 for assembling a suspended scaffold using an embodiment of the clamping device according to the present invention. [Figure 5] This is a perspective view showing a procedure 4 for assembling a suspended scaffolding using an embodiment of the clamping device according to the present invention. [Figure 6] This is a perspective view showing another suspended scaffolding assembly procedure 1 to which an embodiment of the clamping device according to the present invention is applied. [Figure 7] This is a perspective view showing another suspended scaffolding assembly procedure 2 to which an embodiment of the clamping device according to the present invention is applied. [Figure 8] This is a side view showing the overall structure of a mobile scaffolding device to which an embodiment of the clamping device according to the present invention is applied. [Figure 9] Figure 8 is a perspective view showing the motor unit mounted to the frame. [Figure 10] Figure 9 is an enlarged front view showing the motor unit. [Figure 11] Figure 8 is an enlarged plan view showing the rack. [Figure 12]Figure 8 is an enlarged front view showing the rail suspension member. [Figure 13] Figure 12 is a plan view. [Figure 14] Figure 13 is a perspective view. [Figure 15] Figure 12 is a perspective view showing the rail suspension bracket. [Figure 16] Figure 8 is an enlarged front view showing the scaffolding suspension member. [Figure 17] This is a plan view of Figure 16. [Figure 18] Figure 17 is a perspective view. [Figure 19] Figure 16 is a perspective view showing the roller unit. [Figure 20] Figure 16 is a perspective view showing a scaffolding suspension bracket. [Figure 21] (A) to (E) are side views showing the movement sequence of the mobile scaffolding device applied in this embodiment. [Figure 22] This is an explanatory diagram showing the positional relationship between the scaffolding suspension unit and the lower flange during the movement of the mobile scaffolding device applied in this embodiment. [Figure 23] Figure 22 is an enlarged explanatory diagram showing the scaffolding suspension bracket. [Figure 24] Figure 22 is an explanatory diagram showing the positional relationship between the rail suspension unit and the lower flange of the mobile scaffolding device during movement, and also illustrating the state of the rail suspension unit when it is fixed in place. [Figure 25] This is an explanatory diagram showing the positional relationship between the scaffolding suspension member and the lower flange when the upper rail moves in the movement sequence of the mobile scaffolding device applied in this embodiment. [Figure 26] Figure 25 is an enlarged explanatory diagram showing the scaffolding suspension bracket. [Figure 27] Figure 25 shows the positional relationship between the rail suspension unit and the lower flange when the upper rail is moving, and is an enlarged explanatory diagram showing the state when the scaffolding suspension unit is fixed. [Figure 28]This diagram illustrates the positional relationship between the scaffolding suspension unit and the lower flange when the mobile scaffolding is moving and avoiding the splice plate, in the movement sequence of the mobile scaffolding device applied in this embodiment. [Figure 29] Figure 28 is an explanatory diagram showing the positional relationship between the rail suspension unit and the lower flange when the mobile scaffolding is being moved. [Figure 30] This diagram illustrates the positional relationship between the scaffolding suspension unit and the lower flange when the upper rail is moving and avoiding the splice plate, in the movement sequence of the mobile scaffolding device applied in this embodiment. [Figure 31] Figure 30 is an explanatory diagram showing the positional relationship between the rail suspension unit and the lower flange when the upper rail is moving. [Modes for carrying out the invention]

[0018] Embodiments of the present invention will be described below.

[0019] [Embodiments of the Invention] Figures 1 to 5 show a suspended scaffolding assembly method to which an embodiment of the clamping device according to the present invention is applied.

[0020] Figure 1 is a perspective view showing the overall structure of a mobile scaffolding device to which an embodiment of the clamping device according to the present invention is applied. Figure 2 is a perspective view showing scaffolding assembly procedure 1 to which an embodiment of the clamping device according to the present invention is applied. Figure 3 is a perspective view showing suspended scaffolding assembly procedure 2 to which an embodiment of the clamping device according to the present invention is applied. Figure 4 is a perspective view showing suspended scaffolding assembly procedure 3 to which an embodiment of the clamping device according to the present invention is applied. Figure 5 is a perspective view showing suspended scaffolding assembly procedure 4 to which an embodiment of the clamping device according to the present invention is applied.

[0021] Although the structure of the mobile scaffolding device is the same in Figure 1 and Figures 2 to 7, the structure of the mobile scaffolding device in Figures 2 to 7 is simplified compared to Figure 1.

[0022] The mobile scaffolding device 1 to which this embodiment is applied is used to sequentially assemble suspended scaffolding on the underside of a pair of flange members (main girders) 2 made of H-shaped steel in a bridge structure. The pair of flange members 2 are installed side by side so as to be parallel to each other in the horizontal direction. The mobile scaffolding device 1 is suspended from the underside of the horizontal lower flange 2a (locking member) of the pair of flange members 2 of the bridge and is configured to move in the direction in which the flange members 2 extend. A floor surface 3 is installed on the mobile scaffolding device 1, and a worker A stands on this floor surface 3 and drives the moving device 4, thereby moving the mobile scaffolding device 1 in the direction in which the flange members 2 extend.

[0023] Next, the procedure for assembling a suspended scaffolding according to the first embodiment of the suspended scaffolding assembly method applying an embodiment of the clamping device according to the present invention will be described with reference to Figures 2 to 5.

[0024] First, in the suspended scaffolding assembly procedure 1 shown in Figure 2, worker A, riding on the mobile scaffolding device 1, drives the movement device 4 of the mobile scaffolding device 1, thereby moving the mobile scaffolding device 1 in the direction in which the flange member 2 extends, i.e., in the direction of arrow X. Worker A then suspends and fixes the upper ends of cables 5, such as chains and wires, to the lower flanges 2a of a pair of flange members 2 located downstream of the direction of travel. These two cables 5 are suspended and fixed so as to be spaced apart in a direction perpendicular to the direction of movement of the mobile scaffolding device 1.

[0025] Subsequently, as shown in the suspension scaffolding assembly procedure 2 in Figure 3, worker A connects the saddle members 6 as connecting members between the cables 5. That is, the saddle members 6 are connected so as to extend in a direction perpendicular to the direction of movement of the mobile scaffolding device 1. Then, while moving the mobile scaffolding device 1 in the direction of arrow X, downstream, worker A connects the saddle members 6 between the cables 5, and at a certain distance from each other, the next cables 5 are suspended and fixed to the pair of lower flanges 2a as shown in the suspension scaffolding assembly procedure 3 in Figure 4, and the second saddle member 6 is connected between the cables 5 so as to be parallel to the first saddle member 6 connected by worker A.

[0026] Furthermore, as shown in the suspension scaffolding assembly procedure 4 in Figure 5, worker B, who is already standing on the existing main scaffolding 7, places multiple connecting members 8 between the first connected main member 6 and the second connected main member 6. In this case, each connecting member 8 is placed between the first connected main member 6 and the second connected main member 6 so that they are at a constant distance from each other and in the same direction as the movement direction of the mobile scaffolding device 1. Then, worker B attaches the floor material 9 as scaffolding boards onto the connecting members 8, while worker A, who is standing on the mobile scaffolding device 1, suspends and fixes the cables 5 to the pair of lower flanges 2a at a constant distance apart, as described above, and connects the third main member 6 between the cables 5 as described above, thereby assembling the suspension scaffolding 10.

[0027] As described above, in the scaffolding assembly method applying the clamping device embodiment of this embodiment, a worker A of the mobile scaffolding device 1 suspends and fixes multiple cables 5 to the lower flange 2a of a pair of flange members 2 at intervals perpendicular to the direction of movement of the mobile scaffolding device 1, connects a main member 6 extending perpendicularly between these cables 5, and while moving the mobile scaffolding device 1, connects the cables 5 and main member 6 again downstream at intervals, spans multiple support members 8 between these main member 6, and installs flooring material 9 on these support members 8 to assemble the suspended scaffolding 10. Since the work of fixing multiple cables 5 to the lower flange 2a of a pair of flange members 2 and connecting the main member 6 between these cables 5 can be performed by a worker A of the mobile scaffolding device 1, the assembly efficiency of the suspended scaffolding 10 can be significantly increased, and safety can also be enhanced.

[0028] Furthermore, according to the scaffolding assembly method to which the clamping device embodiment of this embodiment is applied, the movable scaffolding device 1 is movably mounted on the pair of flange members 2 via the moving device 4, thereby further increasing the assembly efficiency of the suspended scaffolding 10.

[0029] Furthermore, in the scaffolding assembly method to which the clamping device embodiment of this embodiment is applied, since the upper ends of the multiple cables 5 are fixed to the lower flange 2a of the flange member 2 and suspended, the work of fixing the multiple cables 5 to the lower flange 2a of the flange member 2 by the worker A of the mobile scaffolding device 1 becomes extremely easy, and work efficiency can be increased.

[0030] Next, a procedure for assembling a suspended scaffold using another suspended scaffold assembly method that applies an embodiment of the clamping device according to the present invention will be described with reference to Figures 6 and 7.

[0031] Figure 6 is a perspective view showing another suspended scaffolding assembly procedure 1 to which an embodiment of the clamping device according to the present invention is applied. Figure 7 is a perspective view showing another suspended scaffolding assembly procedure 2 to which an embodiment of the clamping device according to the present invention is applied. The components of each part in this suspended scaffolding assembly procedure will be described using the same reference numerals as in the above-mentioned suspended scaffolding assembly procedure for the same parts.

[0032] First, in the suspended scaffolding assembly procedure 1 shown in Figure 6, worker A, standing on the mobile scaffolding device 1, drives the moving device 4 of the mobile scaffolding device 1, thereby moving the mobile scaffolding device 1 in the direction in which the flange member 2 extends, i.e., in the direction of arrow X. Worker A then suspends and fixes the upper ends of the cables 5 to the lower flanges 2a of the pair of flange members 2 located downstream of the direction of travel. Next, worker B, standing on the main scaffolding (not shown), attaches the panels 11, which serve as scaffolding boards, to the lower ends of the cables 5.

[0033] Then, as shown in the suspended scaffolding assembly procedure 2 in Figure 7, while moving the mobile scaffolding device 1, worker A suspends and fixes the next cable 5 downstream at a certain interval from the previous cable 5, while worker B sequentially attaches panels 11 to the lower ends of these cables 5 to assemble the suspended scaffolding 10.

[0034] As described above, in other scaffolding assembly methods that apply the clamping device embodiment of this embodiment, a worker A of the mobile scaffolding device 1 suspends and fixes multiple cables 5 to the lower flange 2a of a pair of flange members 2 at intervals perpendicular to the direction of movement of the mobile scaffolding device 1, attaches panels 11 between these cables 5, and then, while moving the mobile scaffolding device 1, suspends and fixes the cables 5 again at intervals relative to the cables 5 on the downstream side, and sequentially attaches panels 11 between these cables 5 to assemble the suspended scaffolding 10. Since the work of fixing multiple cables 5 to the lower flange 2a of a pair of flange members 2 can be performed by a worker A of the mobile scaffolding device 1, the assembly efficiency of the suspended scaffolding 10 can be significantly increased, and safety can also be enhanced.

[0035] Next, the configuration of the mobile scaffolding device 1 and its mobile device 4 will be described in detail.

[0036] Figure 8 is a side view showing the overall structure of a mobile scaffolding device to which an embodiment of the mobile device according to the present invention is applied. Figure 9 is a perspective view showing the state in which the motor unit is attached to the frame part of Figure 8. Figure 10 is an enlarged front view showing the motor unit of Figure 9. Figure 11 is an enlarged plan view showing the rack of Figure 8. Figure 12 is an enlarged front view showing the rail suspension member of Figure 8. Figure 13 is a plan view of Figure 12. Figure 14 is a perspective view of Figure 13. Figure 15 is a perspective view showing the rail suspension bracket of Figure 12. Figure 16 is an enlarged front view showing the scaffolding suspension member of Figure 8. Figure 17 is a plan view of Figure 16. Figure 18 is a perspective view of Figure 17. Figure 19 is a perspective view showing the roller unit of Figure 16. Figure 20 is a perspective view showing the scaffolding suspension bracket of Figure 16. Note that, similar to the above, Figure 8 shows the same structure as the mobile scaffolding device of Figure 1, but the structure of the mobile scaffolding device is simplified compared to Figure 1.

[0037] As shown in Figure 8, the mobile scaffolding device 1 equipped with the moving device 4 is a device that is suspended from the underside of the lower surface of a pair of flange members (H-shaped steel) 2 of a bridge structure, as described above, and moves in a predetermined direction by the moving device 4.

[0038] As shown in Figure 8, the moving device 4 is the first moving member , first support member, support means The system consists of an upper rail 17 as a second moving member and a lower rail 18 as a support member, a motor unit 20 as a driving means, and a first lock release means. , clamping device and support means It comprises a rail suspension unit 30 and a scaffolding suspension unit 40 which constitutes a second fixing release means and a clamping device.

[0039] The upper rail 17 is formed in the shape of a rod, specifically a rectangular tube, and is provided to be movable along the direction in which the flange member 2 extends. The lower rail 18 is formed in the shape of a rod, specifically a rectangular plate, and is movable along the upper rail 17. Second It is provided on a part of the movable scaffolding 12 which serves as a support member. As a result, the movable scaffolding 12 is configured to move in conjunction with the movement of the lower rail 18. The movable scaffolding 12 has a frame portion 13, which comprises an upper frame 14 on which the lower rail 18 is provided, and a lower frame 15 attached to the upper frame 14.

[0040] As shown in Figures 9 to 11, the motor unit 20 is installed between the upper rail 17 and the lower rail 18, and is configured to allow relative movement between the upper rail 17 and the lower rail 18. Specifically, the motor unit 20 has a rack portion 21 provided along the length of the upper rail 17, a pinion 22 that meshes with the rack portion 21, and a gear motor 23 that drives the pinion 22. The pinion 22 and the gear motor 23 are installed on the lower rail 18. Therefore, by driving the gear motor 23, the pinion 22 is rotated, causing the upper rail 17 and the lower rail 18 to move relative to each other via the rack portion 21. Limit switches 24 are arranged on both sides of the gear motor 23 on the lower rail 18, and when these limit switches 24 are activated, the operation signal stops the driving of the gear motor 23 or activates the rail suspension unit 30 and the scaffolding suspension unit 40.

[0041] As shown in Figures 12 to 15, the rail suspension unit 30 is configured to allow the upper rail 17 to be fixed and released at any position relative to the lower flange 2a of the flange member 2. The rail suspension unit 30 is provided so as to be movable in a direction perpendicular to the extending direction of the pair of flange members 2, and has a pair of clamp members 31 that can be locked to the lower flanges 2a of the pair of flange members 2, and a rail suspension bracket 37 shown in Figure 15 for suspending the upper rail 17. This rail suspension bracket 37 has a fixing pin 37a, and the upper rail 17 is held on the clamp rail 38 using this fixing pin 37a.

[0042] As shown in Figures 12 to 15, each clamp member 31 includes an upright portion 32 extending upward from a base end slidably mounted on the clamp rail 38, and locking claws 33 integrally formed with the upright portions 32 in a direction approaching each other. These locking claws 33 are driven by a drive mechanism 34, which serves as a driving means, so as to be slidable in directions approaching and separating from each other.

[0043] As shown in Figure 13, the drive mechanism 34 includes a ball screw 35 that is screwed into and passes through the base end of the clamp member 31 and has right-hand and left-hand threads formed coaxially, and a motor 36 that rotates the ball screw 35 in the forward and reverse directions. Therefore, the clamp member 31 is configured such that when the ball screw 35 is rotated in the forward or reverse direction, the locking claws 33 slide along the clamp rail 38 in a direction that brings them closer together when the ball screw 35 is rotated in the reverse direction, and the locking claws 33 slide along the clamp rail 38 in a direction that moves them apart when the ball screw 35 is rotated in the reverse direction.

[0044] Furthermore, when the drive mechanism 34 is driven to slide the locking claws 33 toward each other, these locking claws 33 move to a position above the lower flange 2a of the pair of flange members 2. Conversely, when the drive mechanism 34 is driven to slide the locking claws 33 toward each other, these locking claws 33 move to an outer position spaced apart from the lower flange 2a of the pair of flange members 2.

[0045] As shown in Figures 16 to 20, the scaffolding suspension unit 40 is configured to allow the lower rail 18 to be fixed and released at any position relative to the lower flange 2a of the flange member 2. The scaffolding suspension unit 40 is provided to be movable in a direction perpendicular to the extending direction of the pair of flange members 2 and includes a pair of clamp members 41 that can be locked to the lower flanges 2a of the pair of flange members 2, a roller unit 47 (shown in Figure 19) for smooth movement when moving the upper rail 17, and a scaffolding suspension bracket 48 (shown in Figure 20) for suspending the mobile scaffolding 12.

[0046] The roller unit 47 has a roller 47a on its upper side, which supports the upper rail 17 as it moves, allowing it to move smoothly. The roller unit 47 has two fixing pins 47b, which secure it to the clamp rail 51. The scaffolding suspension bracket 48 has two rollers 48a, which bear the load of the movable scaffolding 12 when the movable scaffolding 12, i.e., the lower rail 18, moves, allowing the movable scaffolding 12 to move smoothly. The scaffolding suspension bracket 48 has two fixing pins 48b, which hold the upper rail 17 to the clamp rail 51.

[0047] As shown in Figures 16 to 18, each clamp member 41 comprises an upright portion 42 extending upward from a base end slidably mounted on the clamp rail 51, and locking claws 43 integrally formed from these upright portions 42 in a direction approaching each other. These locking claws 43 are driven by a drive mechanism 44, which serves as a driving means, so as to be slidable in directions approaching and separating from each other.

[0048] The drive mechanism 44, like the drive mechanism 34 described above, includes a ball screw 45 that is screwed into and passes through the base end of the clamp member 41, as shown in Figure 17, and has right-hand and left-hand threads formed coaxially, and a motor 46 that rotates the ball screw 45 in the forward and reverse directions. Therefore, the clamp member 41 is configured such that when the ball screw 45 is rotated in the forward or reverse direction by driving the motor 46, the locking claws 43 slide along the clamp rail 51 in a direction that brings them closer together when the ball screw 45 is rotated in the forward direction, and slide along the clamp rail 51 in a direction that moves them apart when the ball screw 45 is rotated in the reverse direction.

[0049] Furthermore, when the drive mechanism 44 is driven to slide the locking claws 43 toward each other, these locking claws 43 move to a position above the lower flange 2a of the pair of flange members 2. Conversely, when the drive mechanism 44 is driven to slide the locking claws 43 toward each other, these locking claws 43 move to an outer position spaced apart from the lower flange 2a of the pair of flange members 2.

[0050] Next, we will explain the movement sequence of the mobile scaffolding device 1 and the operation of each component during movement.

[0051] Figures 21(A) to (E) are side views showing the movement sequence of the mobile scaffolding device applied in this embodiment. Figure 22 is an explanatory diagram showing the positional relationship between the scaffolding suspension unit and the lower flange when the mobile scaffolding is moving in the movement sequence of the mobile scaffolding device applied in this embodiment. Figure 23 is an enlarged explanatory diagram showing the scaffolding suspension bracket of Figure 22. Figure 24 is an explanatory diagram showing the positional relationship between the rail suspension unit and the lower flange when the mobile scaffolding device of Figure 22 is moving, and the state when the rail suspension unit is fixed. Figure 25 is an explanatory diagram showing the positional relationship between the scaffolding suspension member and the lower flange when the upper rail is moving in the movement sequence of the mobile scaffolding device applied in this embodiment. Figure 26 is an enlarged explanatory diagram showing the scaffolding suspension bracket of Figure 25. Figure 27 is an enlarged explanatory diagram showing the positional relationship between the rail suspension unit and the lower flange when the upper rail is moving in Figure 25, and the state when the scaffolding suspension unit is fixed.

[0052] Figures 21(A) and (B) show that the lower rail 18, i.e., the movable scaffolding 12, is movable and the rail suspension unit 30 This shows the state when it is fixed (grounded) to the upper surface of the lower flange 2a. Specifically, as shown in Figure 22, the hooking part 43 of the scaffolding suspension unit 40 is not in contact with the upper surface of the lower flange 2a, and a gap G1 is formed with respect to the lower flange 2a. The scaffolding suspension bracket 48 suspends the movable scaffolding 12 via the upper rail 17 as shown in Figure 23, and this movable scaffolding 12 is in a state where it can move along the upper rail 17. On the other hand, the hooking of the rail suspension unit 30 Claw (hereinafter also referred to as the latching part) As shown in Figure 24, part 33 is in contact with the upper surface of the lower flange 2a and is fixed to the lower flange 2a.

[0053] With the upper rail 17 fixed to the lower flange 2a via the rail suspension unit 30, the gear motor 23 of the motor unit 20 is driven to rotate the pinion 22, causing the lower rail 18 to move a predetermined amount relative to the upper rail 17 via the rack section 21, as shown in Figure 21(B). In this embodiment, for example, it moves 1200 mm.

[0054] Here, as shown in Figure 24, rollers 33a are attached to the lower part of each of the pair of hooking parts 33 of the rail suspension unit 30. Also, at the lower part of the pair of hooking parts 43 of the scaffolding suspension unit 40, a roller 43a is attached to one and a fixing release mechanism is attached to the other. , lifting means, jack member A hydraulic jack 49 is installed as such.

[0055] Figures 21(C) and (D) show the state when the upper rail 17 is movable and the scaffolding suspension unit 40 is fixed (grounded) to the upper surface of the lower flange 2a. Specifically, as shown in Figure 25, the hooking portion 43 of the scaffolding suspension unit 40 is fixed to the upper surface of the lower flange 2a by driving the hydraulic jack 49 to lift it. At this time, a gap G2 is formed between the roller 43a of the hooking portion 43 of the scaffolding suspension unit 40 and the upper surface of the lower flange 2a, which is larger than the gap G1 by the amount of lifted by the hydraulic jack 49. Therefore, as shown in Figure 26, a gap G2 is formed between the roller 48a of the scaffolding suspension bracket 48 and the upper rail 17, which is the amount of lifted by the hydraulic jack 49.

[0056] Therefore, the upper rail 17 is the scaffolding suspension unit 40 Roller 48a of scaffolding suspension bracket 48 By being supported by this, only the weight of the upper rail 17 is supported. Roller 48a of scaffolding suspension bracket 48 This will be added to the system. Meanwhile, as shown in Figure 27, the gap G2 of the roller 33a of the hooking portion 33 of the rail suspension unit 30 increases by the amount of lift when the hydraulic jack 49 is lifted on the lower flange 2a, making the upper rail 17 movable.

[0057] With the upper rail 17 movable via the rail suspension unit 30 on the lower flange 2a, the gear motor 23 of the motor unit 20 is driven, and the pinion 22 is rotated, causing the upper rail 17 to move a predetermined amount relative to the lower rail 18 via the rack section 21, as shown in Figure 21(D).

[0058] Figure 21(E) shows the state when the lower rail 18, i.e., the movable scaffolding 12, is movable and fixed (grounded) to the upper surface of the lower flange 2a of the rail suspension unit, similar to Figure 21(A). In this state, with the upper rail 17 fixed to the lower flange 2a via the rail suspension unit 30, similar to the above, the gear motor 23 of the motor unit 20 is driven to rotate the pinion 22, causing the lower rail 18 to move a predetermined amount relative to the upper rail 17 via the rack section 21, as shown in Figure 21(B). By repeating this series of movements, the movable scaffolding 12 is sequentially moved along the lower flange 2a.

[0059] Next, we will describe the operation of each component of the mobile scaffolding device 1 when it is moved, in the case where the splice plate 50 is installed on the lower flange 2a.

[0060] Figure 28 is an explanatory diagram showing the positional relationship between the scaffolding suspension unit and the lower flange when the mobile scaffolding is moving and avoiding the splice plate in the movement sequence of the mobile scaffolding device applied in this embodiment. Figure 29 is an explanatory diagram showing the positional relationship between the rail suspension unit and the lower flange when the mobile scaffolding is moving in Figure 28. Figure 30 is an explanatory diagram showing the positional relationship between the scaffolding suspension unit and the lower flange when the upper rail is moving and avoiding the splice plate in the movement sequence of the mobile scaffolding device applied in this embodiment. Figure 31 is an explanatory diagram showing the positional relationship between the rail suspension unit and the lower flange when the upper rail is moving in Figure 30.

[0061] Figures 28 and 29 show the state when the lower rail 18, i.e., the movable scaffolding 12, is movable and fixed (grounded) to the upper surface of the lower flange 2a of the rail suspension unit. As shown in Figure 28, the pair of latching parts 43 of the scaffolding suspension unit 40 are separated from each other and open wider than the width of the lower flange 2a by driving the motor 46 of the clamp member 41. In this state, the pair of latching parts 43 each form a gap G3 with respect to both sides of the lower flange 2a.

[0062] Furthermore, as shown in Figure 23, the scaffolding suspension bracket 48 suspends the movable scaffolding 12 via the upper rail 17, allowing the movable scaffolding 12 to move along the upper rail 17. On the other hand, as shown in Figure 29, the latching portion 33 of the rail suspension unit 30 is in contact with the upper surface of the lower flange 2a and is fixed to the lower flange 2a.

[0063] Therefore, with the upper rail 17 fixed to the lower flange 2a via the rail suspension unit 30, the gear motor 23 of the motor unit 20 is driven to rotate the pinion 22, causing the lower rail 18 to move a predetermined amount relative to the upper rail 17 via the rack section 21, as shown in Figure 21(B).

[0064] Figures 30 and 31 show the state when the upper rail 17 is movable and fixed (grounded) to the upper surface of the lower flange 2a of the scaffolding suspension unit 40. As shown in Figure 30, by lifting the hydraulic jack 49, the latching portion 43 of the scaffolding suspension unit 40 is fixed to the lower flange 2a. At this time, a gap G2 becomes between the roller 43a of the latching portion 43 of the scaffolding suspension unit 40 and the lower flange 2a, which is larger than the gap G1 by the amount of lifted hydraulic jack 49. Therefore, as shown in Figure 26, a gap G2 is formed between the roller 48a of the scaffolding suspension bracket 48 and the upper rail 17 by the amount of lifted hydraulic jack 49.

[0065] Then, the upper rail 17 is supported by the roller 47a of the roller unit 47 of the scaffolding suspension unit 40, so that only the weight of the upper rail 17 is added to the roller 47a of the roller unit 47. On the other hand, as shown in Figure 31, the gap G2 of the roller 33a of the hooking part 33 of the rail suspension unit 30 increases by the amount of lift when the hydraulic jack 49 is lifted on the lower flange 2a, making the upper rail 17 movable.

[0066] Therefore, with the upper rail 17 movable via the rail suspension unit 30 on the lower flange 2a, the gear motor 23 of the motor unit 20 is driven, and the pinion 22 is rotated, causing the upper rail 17 to move a predetermined amount relative to the lower rail 18 via the rack section 21, as shown in Figure 21(D).

[0067] As described above, according to the moving device 4 of this embodiment, the upper rail 17 is fixed to the lower flange 2a, which is a structure, by the rail suspension unit 30, the lower rail 18 is moved a predetermined amount relative to the upper rail 17 by the motor unit 20, the lower rail 18 is fixed to the lower flange 2a by the scaffolding suspension unit 40, the fixed state of the upper rail 17 is released by the rail suspension unit 30, and then the upper rail 17 is moved a predetermined amount relative to the lower rail 18 by the motor unit 20. As a result, the upper rail 17 and the lower rail 18 can be moved alternately with a single driving means, and even if the shape of the lower flange 2a changes along the way due to the splice plate 50 or the like, it is possible to move smoothly and reliably in a predetermined direction.

[0068] Furthermore, according to the moving device 4 of this embodiment, the motor unit 20 includes a rack section 21 installed in the longitudinal direction of the upper rail 17 and a gear motor 23 that drives a pinion 22 provided on the lower rail 18 and meshing with the rack section 21, so that the upper rail 17 and the lower rail 18 can be moved alternately and smoothly.

[0069] Furthermore, according to the moving device 4 of this embodiment, a movable platform 12 is provided on the lower rail 18, and since this movable platform 12 is configured to move in conjunction with the movement of the lower rail 18, the movable platform 12 can be moved smoothly.

[0070] According to the clamp members 31 and 41 of this embodiment, a hydraulic jack 49 is provided to fix or release the locking claws 33 and 43 to the pair of lower flanges 2a depending on the presence or absence of a gap G1 between the pair of lower flanges 2a and the locking claws 33 and 43, respectively. When there is a gap G1, the locking state of the locking claws 33 and 43 to the pair of lower flanges 2a is released, while when there is no gap G1, the locking claws 33 and 43 are fixed to the pair of lower flanges 2a, respectively. This configuration makes it possible to reliably support the movable scaffolding 12 to the pair of lower flanges 2a.

[0071] Furthermore, according to the clamp members 31 and 41 of this embodiment, when the drive mechanisms 34 and 44 are driven to slide the locking claws 33 and 43 toward each other, these locking claws 33 and 43 move to a position above the pair of lower flanges 2a, while when the drive mechanisms 34 and 44 are driven to slide the locking claws 33 and 43 toward each other, these locking claws 33 and 43 move to a position separated from the pair of lower flanges 2a. This configuration makes it possible to reliably support the movable scaffolding 12 on the pair of lower flanges 2a.

[0072] Furthermore, with the clamp members 31 and 41 of this embodiment, when the drive mechanisms 34 and 44 are driven to slide the locking claws 33 and 43 in a direction away from each other, these locking claws 33 and 43 move to a position separated from the pair of lower flanges 2a. Therefore, even if an obstacle such as a splice plate 50 is installed on the lower flange 2a, the moving device 4 can be moved smoothly.

[0073] Furthermore, according to the clamp members 31 and 41 of this embodiment, since the pair of lower flanges 2a are horizontal flanges formed on the lower part of the H-shaped steel, the movable scaffolding 12 can be reliably supported.

[0074] Furthermore, according to the clamp members 31 and 41 of this embodiment, the motors 36 and 46 rotate the ball screws 35 and 45 in the forward or reverse direction. When rotated in the forward direction, the locking claws 33 and 43 move closer together, while when rotated in the reverse direction, the locking claws 33 and 43 move further apart. Therefore, since the locking claws 33 and 43 can be brought closer together or further apart by a single motor 36 or 46, the structure can be simplified and operability can be improved.

[0075] Furthermore, with the clamp members 31 and 41 of this embodiment, since the pair of lower flanges 2a are horizontal flanges of L-shaped steel that are spaced apart from each other, the movable scaffolding 12 can be reliably supported even if the lower flanges 2a are made of L-shaped steel, thereby increasing versatility.

[0076] [Other embodiments of the invention] While various embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These embodiments can be carried out in a variety of other forms, and various omissions, substitutions, modifications, and combinations are possible without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents.

[0077] For example, in each of the above embodiments, the mobile scaffolding device 1 is moved along the flange member 2 of a bridge as a structure, but it is not limited to this and can also be applied to elevated roads or railways, power plants, and other structures.

[0078] Furthermore, although the above embodiments described the case in which H-shaped steel was used for the flange member 2, the invention is not limited to H-shaped steel, and L-shaped steel may also be used. In this case, clamp members 31 and 41 may be locked to the horizontal portion of the lower flange 2a which serves as the locking member. Therefore, even if the pair of lower flanges 2a are horizontal flanges of L-shaped steel spaced apart from each other, the movable scaffolding 12 can be reliably supported, thereby increasing versatility. [Explanation of Symbols]

[0079] 1. Mobile scaffolding device 2 Flange members 2a Lower flange (locking member) 3 Floor surface 4. Mobile device 5 cables 6 Parent-child members (connecting members) 7 Main scaffolding 8. Support members (bridge members) 9. Flooring (scaffolding planks) 10. Suspended scaffolding 11 panels (scaffolding planks) 12. Mobile scaffolding (support members) 13 Frame section 14 Upper frame 15 Bottom frame 17 Upper rail (first moving member) 18 Lower rail (second moving member) 20 Motor unit (driving means) 21 Rack section 22 pinion 23 Gear motor 30 Rail suspension unit (first fixing release means, clamping device) 31 Clamp member 32 Standing part 33 Latching claw 34. Drive mechanism (driving means) 35 Ball screw 36 Motors 37 Rail suspension bracket 38 Clamp Rails 40 Scaffolding suspension unit 41 Clamp member 42 Standing part 43 Latching claw 43a Laura 44. Drive mechanism (driving means) 45 Ball screw 46 Motor 47 Roller Unit 47a Laura 48 Scaffolding suspension bracket 48a Laura 49. Hydraulic jack (means for releasing the lock) 50 Connection plate 51 Clamp Rail

Claims

1. A clamping device (30) is provided in which a pair of locking members (2a) are installed on the underside of the lower surface of a structure, and a first support member (17) is supported by these locking members (2a) via a pair of first clamp members (31), The pair of first clamp members (31) have upright portions (32) extending upward from a base end provided on the first support member (17), and locking claws (33) formed in a direction approaching each other from these upright portions (32) and provided to surround the pair of locking members (2a), A lifting means (49) is provided for raising or lowering the first support member (17). The lifting means (49) raises the first support member (17) relative to the pair of locking members (2a), thereby creating a gap between the locking claw (33) and the upper surfaces of the pair of locking members (2a), releasing the locking state of the locking claw (33), and making the first support member (17) movable in the longitudinal direction of the pair of locking members (2a). The clamping device is characterized in that the lifting means (49) is configured such that the lifting means (49) lowers the first support member (17) relative to the pair of locking members (2a), thereby eliminating the gap between the locking claw (33) and the upper surfaces of the pair of locking members (2a) and causing contact, thereby locking the locking claw (33) and preventing the first support member (17) from moving the pair of locking members (2a) in the longitudinal direction.

2. A clamping device (40) is provided in which a pair of locking members (2a) are installed on the underside of the lower surface of a structure, and a second support member (12) is supported by these locking members (2a) via a pair of second clamping members (41), The pair of second clamp members (41) each have an upright portion (42) extending upward from a base end provided on the second support member (12), a locking claw (43) formed in a direction approaching each other from these upright portions (42) and provided to surround the pair of locking members (2a), and a jack member (49) provided on the locking claw (43) for raising or lowering the second support member (12), The jack member (49) is driven while the second support member (12) is movably supported by the support means (17, 30) with respect to the pair of locking members (2a), thereby creating a gap with respect to the upper surface of the pair of locking members (2a) and releasing the locking state of the locking claw (43), thereby making the second support member (12) movable in the longitudinal direction of the pair of locking members (2a). The clamping device is characterized in that the jack member (49) is configured such that the jack member (49) is driven while the second support member (12) is movably supported by the support means (17, 30) with respect to the pair of locking members (2a), thereby eliminating the gap between the locking claw (43) and the upper surfaces of the pair of locking members (2a) and bringing them into contact, thereby locking the locking claw (43) and preventing the second support member (12) from moving in the longitudinal direction of the pair of locking members (2a).

3. The drive means (34, 44) is provided to drive the aforementioned locking claws (33, 43) so that they can slide toward and away from each other. When the drive means (34, 44) is driven to slide the locking claws (33, 43) toward each other, these locking claws (33, 43) move to an upper position on the pair of locking members (2a), The clamping device according to claim 1 or 2, characterized in that when the driving means (34, 44) is driven to slide the locking claws (33, 43) in a direction away from each other, these locking claws (33, 43) are configured to move to a position separated from the pair of locking members (2a).

4. The clamping device according to claim 1 or 2, characterized in that the pair of locking members (2a) are horizontal flanges formed on the lower part of the H-shaped steel.

5. The clamping device according to claim 1 or 2, characterized in that the pair of locking members (2a) are horizontal flanges of L-shaped steel that are spaced apart from each other.

6. The clamping device according to claim 3, wherein the driving means (34, 44) includes a ball screw (35, 45) that is screwed into and penetrates the base end of the clamp member (31, 41) and has a right-hand thread and a left-hand thread formed coaxially, and a motor (36, 46) that rotates the ball screw (35, 45) in a forward direction and a reverse direction, and the motor (36, 46) rotates the ball screw (35, 45) in a forward or reverse direction, and when rotated in the forward direction the retaining claws (33, 43) move closer to each other, and when rotated in the reverse direction the retaining claws (33, 43) move away from each other.

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