Connecting bracket, and scaffolding unit equipped therewith
The connecting bracket with a secure attachment mechanism enhances the stability of auxiliary members on work scaffolds by preventing vertical movement and detachment, addressing the instability issues of existing connectors.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- PICA
- Filing Date
- 2022-10-28
- Publication Date
- 2026-06-17
Smart Images
Figure 0007874868000001 
Figure 0007874868000002 
Figure 0007874868000003
Abstract
Description
Technical Field
[0001] The present invention relates to a connecting bracket for connecting auxiliary members such as handrails to the top plate of a work scaffold, and a scaffold unit including the same.
Background Art
[0002] In work scaffolds used in interior construction, small-scale construction work, etc., in order to secure a wide scaffold area, an assembled scaffold unit in which a plurality of identical work scaffolds are arranged side by side and connected is known (for example, Patent Document 1).
[0003] The scaffold disclosed in Patent Document 1 is configured by arranging two scaffolds that can be used independently side by side at a predetermined interval, and hanging and connecting a plurality of connecting scaffold plates between these scaffolds. Also, considering safety, handrails are continuously provided on the top plate of the scaffold. These auxiliary members such as handrails and connecting scaffold plates are detachably connected to the edge portion of the top plate by connectors provided at the ends.
[0004] The connector has a mounting plate fixed to the above-mentioned end portion, a lock plate, a support shaft pivotally connecting the lock plate to the above-mentioned end portion, and a coil spring for biasing the lock plate in one circumferential direction (engagement direction) of the support shaft. An engagement plate and an engagement protrusion that engage with the edge portion of the top plate from above are provided on the upper portion of the mounting plate. On the other hand, a hook-shaped hook portion that engages with the lower edge portion of an attachment attached to the same edge portion from below is provided at the lower end portion of the lock plate. By bringing the engagement plate of the mounting plate into contact with the upper surface portion of the top plate, inserting and engaging the engagement protrusion into a hole provided in the upper surface of the top plate from above, and engaging the hook portion of the lock plate with the lower edge portion of the attachment from below, the auxiliary member is connected and held to the edge portion of the top plate.
Prior Art Documents
Patent Documents
[0005]
Patent Document 1
[0006] However, the above-mentioned connector is configured to hold the edge of the top plate by rotating the lock plate around the pivot shaft and engaging the lower end hook portion with the lower edge of the attachment from the outside of the side edge surface of the top plate. As a result, a gap is easily formed between the hook portion and the engaged end (the lower edge of the attachment), causing looseness in the mounting of the auxiliary member. In addition, if excessive load is applied to the connector in the circumferential direction of the pivot shaft during use, the hook portion may detach from the lower edge of the attachment, and the auxiliary member may fall off the scaffolding.
[0007] This invention was made in view of the above-mentioned problems, and aims to provide a connecting bracket with excellent mounting stability, and a scaffolding unit equipped therewith. [Means for solving the problem]
[0008] To solve the above problems, the connecting bracket of the present invention and the scaffolding unit equipped therewith employ the following technical means.
[0009] The connecting bracket of the present invention is a connecting bracket for connecting an auxiliary member to the top plate of a work scaffold, comprising: an upper engaging portion that abuts against the edge of the top plate from above; a lower engaging portion positioned opposite to the upper engaging portion below and abutting against the edge from below; a connecting shaft portion that connects the upper engaging portion and the lower engaging portion so that they can move up and down with each other; a claw portion and a claw receiving portion that fit together at a connecting position where the upper engaging portion and the lower engaging portion both abut against the edge and prevent the upper engaging portion and the lower engaging portion from moving up and down; a biasing member that biases the claw portion in the direction of fitting into the claw receiving portion; and the fitted state of the claw portion and the claw receiving portion Against the biasing force of the biasing member It includes a manually unlockable locking mechanism. The lock release operator releases the engagement state, and the upper engagement portion and the lower engagement portion are configured to be able to separate from each other in the vertical direction. It is.
[0010] Also, The connecting bracket of the present invention is a connecting bracket for connecting an auxiliary member to the top plate of a work platform, comprising: an upper engaging portion that abuts against the edge of the top plate from above; a lower engaging portion positioned opposite to the upper engaging portion below and abutting against the edge from below; a connecting shaft portion that connects the upper engaging portion and the lower engaging portion so that they can move up and down with each other; a claw portion and a claw receiving portion that fit together at a connecting position where the upper engaging portion and the lower engaging portion both abut against the edge and prevent the upper engaging portion and the lower engaging portion from moving up and down; a biasing member that biases the claw portion in the direction of fitting into the claw receiving portion; and a lock release operator that can manually release the fitted state of the claw portion and the claw receiving portion. The above-mentioned connecting bracket is provided at the lower end of the support post of the handrail, which serves as an auxiliary member erected on the edge, the upper engaging portion extends forward of the fixed frame portion fixed to the lower end of the support post, and the lower engaging portion extends forward of the sliding frame portion which is connected to the lower end of the support post so as to be vertically slidable. There are .
[0011] Also, The connecting bracket of the present invention is a connecting bracket for connecting an auxiliary member to the top plate of a work platform, comprising: an upper engaging portion that abuts against the edge of the top plate from above; a lower engaging portion positioned opposite to the upper engaging portion below and abutting against the edge from below; a connecting shaft portion that connects the upper engaging portion and the lower engaging portion so that they can move up and down with each other; a claw portion and a claw receiving portion that fit together at a connecting position where the upper engaging portion and the lower engaging portion both abut against the edge and prevent the upper engaging portion and the lower engaging portion from moving up and down; a biasing member that biases the claw portion in the direction of fitting into the claw receiving portion; and a lock release operator that can manually release the fitted state of the claw portion and the claw receiving portion. The above-mentioned connecting bracket is provided on the upper end of the support column of the ladder, which is an auxiliary member that is suspended from the edge portion, the upper engaging portion extends forward of the connecting frame portion that is horizontally installed on the upper end of the support column, and the lower engaging portion extends forward of the sliding frame portion that is connected to the connecting frame portion so as to be vertically slidable. There are .
[0012] Furthermore, the connecting bracket of the present invention is a connecting bracket for connecting an auxiliary member to the top plate of a work platform, comprising: an upper engaging portion that abuts against the edge of the top plate from above; a lower engaging portion positioned opposite to the upper engaging portion below and abutting against the edge from below; a connecting shaft portion that connects the upper engaging portion and the lower engaging portion so that they can move up and down with each other; a claw portion and a claw receiving portion that fit together at a connection position where both the upper engaging portion and the lower engaging portion abut against the edge and prevent the upper engaging portion and the lower engaging portion from moving up and down; a biasing member that biases the claw portion in the direction of fitting into the claw receiving portion; and a lock release operator that can manually release the fitted state of the claw portion and the claw receiving portion. The upper engaging portion has a substantially cylindrical upper engaging projection that can be fitted into an upper engaging hole provided on the upper surface of the end edge portion. There are .
[0013] Furthermore, the lower engaging portion may have a substantially cylindrical lower engaging projection that can be fitted into a lower engaging hole provided on the lower surface of the end edge.
[0014] Furthermore, the scaffolding unit of the present invention , heaven A board, and legs that support the top board from below. , supplement Handrails and ladders as auxiliary components, The auxiliary member is connected to the top plate. A connecting bracket, and The connecting bracket comprises: an upper engaging portion that abuts against the edge of the top plate from above; a lower engaging portion positioned opposite to the upper engaging portion below and abutting against the edge from below; a connecting shaft portion that connects the upper engaging portion and the lower engaging portion so that they can move up and down with each other; a claw portion and a claw receiving portion that fit together at a connection position where both the upper engaging portion and the lower engaging portion abut against the edge and prevent the upper engaging portion and the lower engaging portion from moving up and down; a biasing member that biases the claw portion in the direction of fitting into the claw receiving portion; and a lock release operator that can manually release the fitted state of the claw portion and the claw receiving portion. It is.
[0015] Furthermore, the scaffolding unit may be provided with a reinforcing frame that is more rigid than the top plate at the contact position of the upper engaging portion at the edge.
[0016] Furthermore, the handrail and the ladder each have a pair of connecting brackets arranged at predetermined intervals, and the top plate may have a plurality of first engagement holes arranged at the same intervals as the connecting brackets of the handrail, and a plurality of second engagement holes arranged at the same intervals as the connecting brackets of the ladder, which serve as upper engagement holes into which the upper engagement projections provided on the upper engagement portion can be fitted.
Advantages of the Invention
[0017] According to the connecting bracket of the present invention and the scaffolding unit provided with the same, auxiliary members such as handrails can be firmly connected to the top plate, so that the mounting stability is significantly improved.
Brief Description of the Drawings
[0018] [Figure 1] It is a perspective view of the scaffolding unit. [Figure 2] It is a top view of the scaffolding unit. [Figure 3] It is a longitudinal sectional view around the edge of the top plate. [Figure 4] It is a perspective view of the handrail. [Figure 5] It is a perspective view around the connecting bracket of the handrail. [Figure 6] It is a longitudinal sectional view around the connecting bracket of the handrail. [Figure 7] It is a perspective view around the upper end of the strut of the ladder. [Figure 8] It is a top view of the connecting bracket of the ladder. [Figure 9] It is a perspective view of the connecting bracket of the ladder. [Figure 10] It is a longitudinal sectional view of the connecting bracket of the ladder. [Figure 11] It is a longitudinal sectional view around the edge of the top plate showing a modified example.
Embodiments for Carrying Out the Invention
[0019] Hereinafter, the connecting bracket according to the embodiment of the present invention and the scaffolding unit provided with the same will be described based on the drawings. Note that the embodiments described below are an example of embodying the present invention, and do not limit the configuration of the present invention with specific examples.
[0020] As shown in Figure 1, the scaffolding unit 1 of this embodiment comprises a flat-shaped work platform 2 that can be used independently, and one or more handrails 3 and ladders 4 as auxiliary members. In this embodiment, the scaffolding unit 1 is equipped with two types of handrails 3 (large handrail 3A and small handrail 3B) with different dimensions in the left-right width direction, and a ladder 4. Note that either the handrails 3 or the ladders 4 may be provided individually if necessary. Furthermore, the scaffolding unit 1 may consist of two or more work platforms 2 connected side by side.
[0021] The work platform 2 is a flat platform that can be folded in half and comprises a top plate 5 that serves as a platform for workers, and a pair of left and right legs 6 that support the top plate 5 from below. In this embodiment, the short side of the top plate 5 (arrows X1 and X2 in Figures 1 and 2) is the front-to-back direction, the long side of the top plate 5 (arrows Y1 and Y2 in Figures 1 and 2) is the left-to-right direction, and the thickness direction of the top plate 5 (arrows Z1 and Z2 in Figure 1) is the up-and-down direction. Furthermore, in this embodiment, both the handrail 3 and the ladder 4 are attached to the outer edge portion 7 of the top plate 5 (top plate edge portion) by connecting brackets 8 and 9. Using the handrail 3 and ladder 4 attached to the rear edge portion 7a of the top plate edge portion 7 as a reference, the side of the rear edge portion 7a (arrow X1 in Figures 1 and 2) is the front of the handrail 3 and ladder 4, and the side opposite the rear edge portion 7a (arrow X2 in Figures 1 and 2) is the rear of the handrail 3 and ladder 4.
[0022] As shown in Figures 1 and 2, the top plate 5 is a plate that is roughly rectangular when viewed from above, and has a top plate body 11 that is roughly rectangular when viewed from above and divided in the middle between the left and right sides, and an outer peripheral frame portion 12 that covers the front, back and left and right end faces of the top plate body 11 from the outside.
[0023] As shown in Figure 3, the outer perimeter frame 12 is a frame with a roughly E-shaped vertical cross-section and is provided along the entire circumference of the end face of the top plate body 11. Multiple circular engagement holes 15 and 16 are formed in the upper surface 13 and lower surface 14 of the outer perimeter frame 12, respectively, which serve as connecting and fixing points for the handrail 3 and ladder 4.
[0024] As shown in Figure 2, the outer perimeter frame portion 12 has upper engagement holes 15 provided on the upper surface portion 13, which include a plurality of first engagement holes 15A that serve as mounting points for the large handrail 3A, and a plurality of second engagement holes 15B that serve as mounting points for the small handrail 3B and the ladder 4. The distance W1 between a pair of first engagement holes 15A is set to be greater than the distance W2 between a pair of second engagement holes 15B. Although not shown, a plurality of lower engagement holes 16 are also formed on the lower surface portion 14 of the outer perimeter frame portion 12 in a similar arrangement to that on the upper surface portion 13, opposite the first engagement holes 15A. (See Figure 3)
[0025] As shown in Figure 4, the handrail 3 has an outer frame 20 formed by bending a rectangular cross-section frame material into a roughly U-shape, a pair of left and right support posts 21 that extend vertically and are arranged side by side with a predetermined interval in the left-right direction, a horizontal rail 22 that is horizontally placed between the support posts 21, and a pair of left and right connecting brackets (handrail brackets) 8 that are respectively disposed at the lower ends (lower end of support posts) 21U of the support posts, and is erected on the edge of the top plate 7 (see Figure 3). In this embodiment, a width plate 23 is also horizontally installed between the lower end of the support posts 21U.
[0026] Furthermore, in the small handrail 3B shown in Figure 4, the left and right vertical frame sections of the outer frame 20 become support columns 21, and the distance between these support columns 21 (distance between the centers of the support columns 21) matches the distance W2 between the second engagement holes 15B provided in the outer frame section 12 of the top plate 5 (see Figure 2). On the other hand, the large handrail 3A is made of outer frame 2 Two support columns 21 extend vertically inward from the left and right vertical frame sections of 0 (see Figure 1), and the distance between these support columns 21 coincides with the distance W1 between the first engagement holes 15A provided in the outer peripheral frame section 12 of the top plate 5 (see Figure 2).
[0027] Furthermore, as shown in Figures 1 and 2, the spacing between the support posts 21 of the large handrail 3A is set to be greater than the spacing between the support posts 21 of the small handrail 3B. That is, the outer frame portion 12 has a plurality of first engagement holes 15A arranged at the spacing of the handrail brackets 8 of the large handrail 3A, and a plurality of second engagement holes 15B arranged at the spacing of the handrail brackets 8 of the small handrail 3B.
[0028] As shown in Figures 3, 5, and 6, the handrail bracket 8 includes a fixed frame portion 24 fixed along the outer surface portion (front portion) 21a of the lower end portion 21U of the support column, a sliding frame portion 25 connected to the lower end portion 21U of the support column so as to be vertically slidable, an upper engaging portion 26 provided on the fixed frame portion 24 and in contact with the outer peripheral frame portion 12 of the top plate 5 from above, a lower engaging portion 27 provided on the sliding frame portion 25 and positioned opposite to the upper engaging portion 26 below and in contact with the outer peripheral frame portion 12 of the top plate 5 from below, and a pair of upper and lower connecting shaft portions 28 that connect the upper engaging portion 26 and the lower engaging portion 27 so as to be vertically movable.
[0029] Furthermore, as shown in Figure 6, the handrail bracket 8 is fitted in a connection position (see Figure 3) where both the upper engaging portion 26 and the lower engaging portion 27 abut against the outer frame portion 12, and includes an engaging pin 29 as a claw portion and a pin insertion hole 30 as a claw receiving portion that prevents the upper engaging portion 26 and the lower engaging portion 27 from moving up and down, a pressing spring 31 as a biasing member that biases the engaging pin 29 in the direction of fitting into the pin insertion hole 30, and a lock release operator 32 that can manually release the fitted state of the engaging pin 29 and the pin insertion hole 30.
[0030] As shown in Figures 3 to 6, the fixed frame portion 24 is a plate formed by bending into a roughly rectangular U-shape, and is attached so as to surround the front portion 21a and both left and right side portions 21b of the lower end portion 21U of the support column, and is fixed to the lower end portion 21U of the support column from both the left and right sides by connecting shaft portions 28.
[0031] As shown in Figures 3, 5, and 6, the sliding frame portion 25 is a cylindrical body with a substantially rectangular cross-section and is inserted into the hollow part of the lower end portion 21U of the support column from the lower end opening. A pair of elongated oval guide holes 33, which are long in the vertical direction, are provided through the left and right side portions 25b of the sliding frame portion 25. The connecting shaft portion 28 is inserted through the guide holes 33 from the left and right directions of the side portions 25b. As a result, the sliding frame portion 25 is held so as to be able to slide up and down within the range formed by the guide holes 33 relative to the lower end portion 21U of the support column.
[0032] As shown in Figures 3 and 5, the upper engaging portion 26 is a substantially flat plate piece, and is formed extending forward from the central upper edge of the fixed frame portion 24 in a position with one plate surface portion (lower surface portion) 26A facing downward. A cylindrical upper engaging projection 35 is formed on the lower surface portion 26A of the upper engaging portion 26, which can be fitted into the upper engaging hole 15 of the outer peripheral frame portion 12. The upper engaging projection 35 is provided projecting downward at the center position between the left and right sides of the lower surface portion 26A of the upper engaging portion 26, and is fitted into the upper engaging hole 15 from above by bringing the lower surface portion 26A of the upper engaging portion 26 into contact with the upper surface portion 13 of the outer peripheral frame portion 12.
[0033] The lower engaging portion 27 is a substantially flat plate piece, and is formed extending forward from the lower end of the sliding frame portion 25 with one plate surface portion (upper surface portion) 27A facing upward. A cylindrical lower engaging projection 36 is formed on the upper surface portion 27A of the lower engaging portion 27, which can be fitted into the lower engaging hole 16 of the outer peripheral frame portion 12. The lower engaging projection 36 is provided projecting upward at the center position between the left and right sides of the upper surface portion 27A of the lower engaging portion 27, and is fitted into the lower engaging hole 16 from below by bringing the upper surface portion 27A of the lower engaging portion 27 into contact with the lower surface portion 14 of the outer peripheral frame portion 12.
[0034] As shown in Figure 6, the engagement pin 29 is a cylindrical shaft that extends from the inside of the unlocking operator 32 toward the side portion 21b of the support column 21 in a left-right direction. The tip 29T of the engagement pin 29 penetrates the side portion 21b and is then fitted into a pin insertion hole 30 opened in the side portion 25b of the sliding frame portion 25.
[0035] The compression spring 31 is a compression spring housed inside a cylinder case 37 connected and fixed to the fixed frame 24, and constantly biases the engagement pin 29 toward the support column 21 (laterally). As a result, the engagement pin 29 is held in a state where its tip 29T is fitted into the pin insertion hole 30 of the sliding frame 25. Furthermore, by manually pulling the lock release operator 32, the engagement pin 29 is disengaged from the pin insertion hole 30 against the biasing force of the compression spring 31, causing the sliding frame 25 (lower engagement portion 27) to slide downwards toward the lower end of the support column 21U due to its own weight, separating the lower engagement portion 27 from the upper engagement portion 26. In this way, the lower engagement portion 27 semi-automatically becomes disconnected from the upper engagement portion 26 by pulling the lock release operator 32.
[0036] Furthermore, when the engaging pin 29 is removed from the pin insertion hole 30 as described above and the sliding frame 25 is slid downward, the engaging pin 29 is positioned so that its tip 29T faces the side surface 25b of the sliding frame 25. If the pulling operation of the lock release operator 32 is stopped in this state, the tip 29T is pressed against the side surface 25b of the sliding frame 25 by the biasing force of the compression spring 31. As a result, the sliding frame 25 is held in the disengaged position, slid downward by the lower end 21U of the support column. This makes it less likely for the lower engaging portion 27 to get in the way when connecting the handrail 3 to the top plate 5.
[0037] Furthermore, with the lower engaging portion 27 held in the disengaged position, the upper engaging portion 26 is brought into contact with the outer frame portion 12 of the top plate 5 from above (the upper engaging projection 35 is fitted into the upper engaging hole 15 of the outer frame portion 12), and the lower engaging portion 27 is pushed up to bring it closer to the upper engaging portion 26, causing the engaging pin 29 to be inserted again into the pin insertion hole 30 by the biasing force of the compression spring 31. As a result, the lower engaging portion 27 is fixedly held in a state where it is in contact with the outer frame portion 12 of the top plate 5 from below (the lower engaging projection 36 is fitted into the lower engaging hole 16 of the outer frame portion 12). This makes it easy to connect the handrail 3 to the top plate 5.
[0038] As shown in Figures 1 and 7, the ladder 4 has a pair of left and right support columns 41 that extend vertically and are arranged side by side at a predetermined distance apart in the left and right direction, a horizontal rail 42 that is horizontally placed between the support columns 41, and a pair of left and right connecting brackets (ladder brackets) 9 that are respectively placed at the upper ends (upper end of support columns) 41T of the support columns, and is suspended from the edge of the top plate 7.
[0039] As shown in Figures 7 to 10, the ladder bracket 9 includes a connecting frame portion 44 horizontally installed between the upper ends 41T of the left and right support columns, a sliding frame portion 45 connected to the connecting frame portion 44 so as to be vertically slidable, an upper engaging portion 26 extending forward from the connecting frame portion 44 and contacting the outer peripheral frame portion 12 of the top plate 5 from above, a lower engaging portion 27 extending forward from the sliding frame portion 45 and positioned opposite to the upper engaging portion 26 below and contacting the outer peripheral frame portion 12 of the top plate 5 from below, and a pair of upper and lower connecting shaft portions 28 that connect the upper engaging portion 26 and the lower engaging portion 27 so as to be vertically movable.
[0040] Furthermore, as shown in Figure 10, the ladder bracket 9 is fitted at a connection position where the upper engaging portion 26 and the lower engaging portion 27 both abut against the outer peripheral frame portion 12, and includes an engaging pin 29 as a claw portion and a pin insertion hole 30 as a claw receiving portion that prevent the upper engaging portion 26 and the lower engaging portion 27 from moving up and down, a pressing spring 31 as a biasing member that biases the engaging pin 29 in the direction of fitting into the pin insertion hole 30, and a lock release operator 32 that can manually release the fitted state of the engaging pin 29 and the pin insertion hole 30.
[0041] As shown in Figure 7, the connecting frame portion 44 is a plate body formed by bending in a roughly L-shape, and the left and right sides The connecting frame portion 44 extends between the upper ends 41T of the support columns and is connected and supported by both upper ends 41T of the support columns. The connecting frame portion 44 has an upper plate portion 44A that extends in the front-rear direction and a rear plate portion 44B that extends downward from the rear end edge of the upper plate portion 44A, with the upper plate portion 44A constituting the upper engaging portion 26. As shown in Figure 8, the connecting shaft portion 28 is fixed at a position outward in the left-right direction from the connection position of the support column 41 on the rear surface of the rear plate portion 44B. As shown in Figure 9, the connecting shaft portion 28 is provided in a pair, one above the other, on the rear surface of the rear plate portion 44B and protrudes rearward from the rear surface.
[0042] As shown in Figures 9 and 10, the upper engaging portion 26 is formed extending forward from the upper edge of the rear plate portion 44B in a position with one of the plate surfaces (lower surface portion) 26A facing downward. The lower surface portion 26A of the upper engaging portion 26 has a cylindrical upper engaging projection 35 that can be fitted into the upper engaging hole 15 of the outer peripheral frame portion 12.
[0043] The upper engaging projection 35 is provided projecting downward from the lower surface portion 26A of the upper engaging portion 26. The upper engaging projection 35 is also provided at a position laterally outward from the connection position of the support column 41 on the upper engaging portion 26 (upper plate portion 44A) (see Figure 8), and by abutting and engaging the lower surface portion 26A of the upper engaging portion 26 with the upper surface portion 13 of the outer frame portion 12, it is fitted from above into the two upper engaging holes 15 (second engaging holes 15B). The distance between the upper engaging projections 35 is set to be the same as the distance between the upper engaging portions 26 provided on the left and right handrail brackets 8 of the small handrail 3B. That is, the spacing of the ladder brackets 9 is set to be the same as the spacing of the handrail brackets 8 of the small handrail 3B. Therefore, the ladder brackets 9 and the handrail brackets 8 of the small handrail 3B are connected to the outer frame portion 12 of the top plate 5 using the common second engaging holes 15B.
[0044] The sliding frame portion 45 is a substantially flat plate extending in the vertical direction and is arranged in a face-to-face manner on the rear surface of the rear plate portion 44B (see Figure 9). Each sliding frame portion 45 has a pair of elongated oval guide holes 33 that are vertically elongated. The connecting shaft portion 28 is inserted through each of the guide holes 33 from the front and rear directions. As a result, the sliding frame portion 45 is held so as to be able to slide vertically within the range formed by the guide holes 33 relative to the connecting frame portion 44.
[0045] As shown in Figures 9 and 10, the lower engaging portion 27 is a substantially flat plate piece, extending forward from the lower edge of the sliding frame portion 45 with one plate surface (upper surface) 27A facing upward. That is, the lower engaging portion 27 and the sliding frame portion 45 are a plate body integrally formed in an L-shape. A cylindrical lower engaging projection 36 is formed on the upper surface 27A of the lower engaging portion 27, which can be fitted into the lower engaging hole 16 of the outer peripheral frame portion 12. The lower engaging projection 36 is provided projecting upward at the center position between the left and right sides of the upper surface 27A of the lower engaging portion 27, and is fitted into the lower engaging hole 16 from below by bringing the upper surface 27A of the lower engaging portion 27 into contact with the lower surface 14 of the outer peripheral frame portion 12.
[0046] As shown in Figure 10, the engagement pin 29 is a cylindrical shaft that extends from the inside of the unlocking operator 32 toward the connecting frame 44 in a left-right direction. The tip 29T of the engagement pin 29 is fitted into a pin insertion hole 30 opened in the rear plate portion 44B of the connecting frame 44.
[0047] The compression spring 31 is a compression spring housed inside a cylinder case 37 connected and fixed to the sliding frame 45, and constantly biases the engagement pin 29 toward the connecting frame 44 (forward). As a result, the engagement pin 29 is held in a state where its tip 29T is fitted into the pin insertion hole 30 of the sliding frame 45. Furthermore, by manually pulling the lock release operator 32, the engagement pin 29 is disengaged from the pin insertion hole 30 against the biasing force of the compression spring 31, causing the sliding frame 45 (lower engagement part 27) to slide downward toward the connecting frame 44 due to its own weight, separating the lower engagement part 27 from the upper engagement part 26. In this way, the lower engagement part 27 semi-automatically becomes disengaged from the upper engagement part 26 by pulling the lock release operator 32.
[0048] Furthermore, when the engaging pin 29 is removed from the pin insertion hole 30 as described above and the sliding frame portion 45 is slid downward, the engaging pin 29 is positioned so that its tip portion 29T faces the rear plate portion 44B of the connecting frame portion 44. If the pulling operation of the lock release operator 32 is stopped in this state, the tip portion 29T is pressed against the rear plate portion 44B of the connecting frame portion 44 by the biasing force of the compression spring 31. As a result, the sliding frame portion 45 is held in the unlocked position, which is slid downward from the connecting frame portion 44. This makes it less likely for the lower engaging portion 27 to get in the way when connecting the ladder 4 to the top plate 5.
[0049] Furthermore, with the lower engaging portion 27 held in the disengaged position, the upper engaging portion 26 is brought into contact with the outer frame portion 12 of the top plate 5 from above (the upper engaging projection 35 is fitted into the upper engaging hole 15 of the outer frame portion 12), and the lower engaging portion 27 is pushed up to bring it closer to the upper engaging portion 26, causing the engaging pin 29 to be inserted again into the pin insertion hole 30 by the biasing force of the compression spring 31. As a result, the lower engaging portion 27 is fixedly held in a state where it is in contact with the outer frame portion 12 of the top plate 5 from below (the lower engaging projection 36 is fitted into the lower engaging hole 16 of the outer frame portion 12). This makes it easy to connect the ladder 4 to the top plate 5.
[0050] In the scaffolding unit 1 shown in Figure 11, a reinforcing frame 50, which is more rigid than the top plate 5, is provided at the contact position of the upper engaging portion 26 on the outer peripheral frame portion 12 of the top plate 5. Specifically, a groove 51 is recessed in the upper surface portion 13 of the outer peripheral frame portion 12 along the position where the upper engaging hole 15 is formed. Furthermore, a long, flat reinforcing frame 50, made of a material more rigid than the outer peripheral frame portion 12 of the top plate 5, is embedded and fixed in the groove 51 in a state where it is flush with the upper surface portion 13 of the outer peripheral frame portion 12.
[0051] Furthermore, through holes 52 connected to the upper engagement holes 15 are provided in the reinforcing frame 50 at positions opposite each upper engagement hole 15, and the upper engagement projection 35 provided in the upper engagement hole 15 is fitted into the upper engagement hole 15 through the through holes 52. As a result, deformation or damage is less likely to occur at the contact points, and the handrail 3 and ladder 4 can be firmly fixed and held to the top plate 5 with less rattle. Thus, the mounting stability of the handrail 3 and ladder 4 is further improved.
[0052] Although not shown in the diagram, the reinforcing frame 50 may also be provided at the contact position of the lower engaging portion 27 on the outer peripheral frame portion 12 of the top plate 5. This prevents damage or deformation of the contact positions of the upper engaging portion 26 and the lower engaging portion 27 on the outer peripheral frame portion 12 of the top plate 5, thereby allowing the handrail 3 and ladder 4 to be fixed and held more firmly to the top plate 5 with less rattling. Thus, the mounting stability of the handrail 3 and ladder 4 is further improved.
[0053] As described above, the connecting brackets 8 and 9 of the above embodiment are connecting brackets 8 and 9 for connecting auxiliary members 3 and 4 to the top plate 5 of the work scaffolding 2, and include an upper engaging portion 26 that abuts against the edge portion 7 of the top plate 5 from above, a lower engaging portion 27 that is positioned opposite to the upper engaging portion 26 at a lower position and abuts against the edge portion 7 from below, a connecting shaft portion 28 that connects the upper engaging portion 26 and the lower engaging portion 27 so that they can move up and down with each other, a claw portion 29 and a claw receiving portion 30 that fit together at a connection position where the upper engaging portion 26 and the lower engaging portion 27 both abut against the edge portion 7 and prevent the upper engaging portion 26 and the lower engaging portion 27 from moving up and down, a biasing member 31 that biases the claw portion 29 in the direction of fitting into the claw receiving portion 30, and a lock release operator 32 that can manually release the fitted state of the claw portion 29 and the claw receiving portion 30.
[0054] In this design, the upper engaging portion 26 and the lower engaging portion 27 engage with the upper surface portion 13 and the lower surface portion 14 of the edge portion 7 of the top plate 5 from above and below, respectively, causing the claw portion 29 and the claw receiving portion 30 to fit together and preventing the upper engaging portion 26 and the lower engaging portion 27 from sliding up and down. As a result, the edge portion 7 of the top plate 5 can be firmly fixed and held by the upper engaging portion 26 and the lower engaging portion 27. Therefore, looseness in the mounting state of the auxiliary member to the top plate 5 is unlikely to occur. Moreover, in this design, even if a load is applied to the connecting brackets 8 and 9 in the circumferential direction of the edge portion 7 of the top plate 5, i.e., in the direction of rotation back and forth, the upper engaging portion 26 and the lower engaging portion 27 are unlikely to come off the edge portion 7 of the top plate 5. There is little risk of materials 3 and 4 falling off the top plate 5. This makes it possible to create connecting brackets 8 and 9 with high mounting stability.
[0055] Furthermore, the connecting bracket 8 is provided on the lower end 21U of the support column of the handrail 3, which is an auxiliary member erected on the edge portion 7. The upper engaging portion 26 extends forward of the fixed frame portion 24 fixed to the lower end 21U of the support column, and the lower engaging portion 27 extends forward of the sliding frame portion 25 which is connected to the lower end 21U of the support column so as to be vertically slidable.
[0056] In this design, the handrail 3 is engaged and supported by the upper engaging portion 26 fixed to the lower end 21U of the support column, and in this state, the lower engaging portion 27 can engage and fix the edge 7 of the top plate 5 from below, thus allowing the handrail 3 to be attached to the top plate 5 more stably.
[0057] Furthermore, the connecting bracket 9 is provided on the upper end 41T of the support column of the ladder 4, which is an auxiliary member suspended from the edge portion 7. The upper engaging portion 26 extends forward of the connecting frame portion 44 which is horizontally installed on the upper end 41T of the support column, and the lower engaging portion 27 extends forward of the sliding frame portion 45 which is connected to the connecting frame portion 44 so as to be vertically slidable.
[0058] In this design, the ladder 4 is engaged and supported by the upper engaging portion 26 fixed to the upper end 41T of the support column, and in this state, the lower engaging portion 27 can engage and fix the edge 7 of the top plate 5 from below, thus allowing the ladder 4 to be attached to the top plate 5 more stably.
[0059] Furthermore, the upper engaging portion 26 has a substantially cylindrical upper engaging projection 35 that can be fitted into an upper engaging hole 15 provided on the upper surface portion 13 of the edge portion 7. In this configuration, the outer circumferential surface of the upper engaging projection 35 abuts and engages with the inner circumferential surface of the upper engaging hole 15, so the upper engaging portion 26 engages with the edge portion 7 of the top plate 5 with less rattle compared to configurations where the end face or surface of the plate body engages with the engaged portion of the top plate 5. Therefore, mounting stability is further improved.
[0060] Furthermore, the lower engaging portion 27 has a substantially cylindrical lower engaging projection 36 that can be fitted into a lower engaging hole 16 provided on the lower surface portion 14 of the edge portion 7. In this configuration, the lower engaging portion 27 engages with the edge portion 7 of the top plate 5 with less rattle compared to a configuration where the end face or surface of the plate body engages with the engaged portion of the top plate 5, thus further improving mounting stability.
[0061] The scaffolding unit 1 of the above embodiment comprises a top plate 5, legs 6 that support the top plate 5 from below, handrails 3 and ladders 4 as auxiliary members, and the connecting brackets 8 and 9. In this configuration, the handrails 3 and ladders 4 are fixedly held to the top plate 5 with minimal rattle, and there is little risk of the handrails 3 and ladders 4 falling off the top plate 5. This makes it possible to realize a scaffolding unit 1 with high mounting stability for the handrails 3 and ladders 4.
[0062] Furthermore, the scaffolding unit 1 is provided with a reinforcing frame 50 that is more rigid than the top plate 5 at the contact point of the upper engaging portion 26 on the edge 7. With this design, deformation and damage are less likely to occur at the contact point of the upper engaging portion 26 on the edge 7 of the top plate 5, so the handrail 3 and ladder 4 can be firmly fixed and held to the top plate 5 with less rattle. Thus, the mounting stability of the handrail 3 and ladder 4 is further improved.
[0063] Furthermore, the handrail 3 and ladder 4 each have a pair of connecting brackets 8 and 9 arranged at predetermined intervals, and the top plate 5 has upper engaging holes 15 into which the upper engaging projections 35 provided on the upper engaging portion 26 can be fitted, and has a plurality of first engaging holes 15A arranged at the same intervals as the connecting brackets 8 of the handrail 3 (large handrail 3A), and a plurality of second engaging holes 15B arranged at the same intervals as the connecting brackets 9 of the ladder 4. It is.
[0064] In this design, the handrail 3 and ladder 4 are firmly connected to the top plate 5 by a pair of connecting brackets 8 and 9, further improving the mounting stability of the handrail 3 and ladder 4. Moreover, in this design, the handrail 3 (large handrail 3A) and ladder 4 can be easily attached to the appropriate positions on the top plate 5, significantly improving the ease of assembly. [Explanation of Symbols]
[0065] 1 scaffolding unit 2. Work scaffolding 3. Handrail (support component) 4. Ladder (support member) 5. Top plate six legged body 7. Edge of the tabletop (edge) 8. Handrail bracket (connecting bracket) 9. Ladder bracket (connecting bracket) 15 Upper engagement hole 16 Lower engagement hole 21 Post 24 Fixed frame section 25 Sliding frame section 26 Upper engaging portion 27 Lower engagement portion 28 Connecting shaft 29 Engaging pin (claw part) 30 Pin insertion holes (claw receiving part) 31 Compression spring (biasing member) 32. Unlocking operator 35 Upper engaging protrusion 36 Lower engaging protrusion 41 Post 44 Connecting frame section 45 Sliding frame section
Claims
1. A connecting bracket for connecting auxiliary members to the top plate of a work scaffold, An upper engaging portion that abuts against the edge of the top plate from above, A lower engaging portion is positioned opposite to the upper engaging portion at a lower position below it and contacts the edge portion from below, A connecting shaft portion that connects the upper engaging portion and the lower engaging portion so that they can move up and down with each other, The upper engaging portion and the lower engaging portion are fitted together at a connecting position where they both abut against the edge portion, and the claw portion and claw receiving portion prevent the upper engaging portion and the lower engaging portion from moving up and down. A biasing member that biases the claw portion in the direction of fitting it into the claw receiving portion, The system includes a lock release operator that can manually release the engaged state of the claw portion and the claw receiving portion against the biasing force of the biasing member, A connecting bracket in which the fitted state is released by the release operation of the lock release operator, and the upper engaging portion and the lower engaging portion become able to separate from each other in the vertical direction.
2. A connecting bracket for connecting an auxiliary member to the top plate of a work platform, An upper engaging portion that abuts against the edge of the top plate from above, A lower engaging portion is positioned opposite to the upper engaging portion at a lower position below it and contacts the edge portion from below, A connecting shaft portion that connects the upper engaging portion and the lower engaging portion so that they can move up and down with each other, The upper engaging portion and the lower engaging portion are fitted together at a connecting position where they both abut against the edge portion, and the claw portion and claw receiving portion prevent the upper engaging portion and the lower engaging portion from moving up and down. A biasing member that biases the claw portion in the direction of fitting it into the claw receiving portion, The system includes a lock release operator that allows manual release of the engaged state of the claw portion and the claw receiving portion, It is provided at the lower end of the support post of the handrail, which serves as an auxiliary member and is erected on the aforementioned edge, The aforementioned upper engaging portion extends forward of the fixed frame portion fixed to the lower end of the support column, The lower engaging portion is a connecting bracket that extends forward of a sliding frame portion which is connected to the lower end of the support column so as to be vertically slidable.
3. A connecting bracket for connecting an auxiliary member to the top plate of a work platform, An upper engaging portion that abuts against the edge of the top plate from above, A lower engaging portion is positioned opposite to the upper engaging portion at a lower position below it and contacts the edge portion from below, A connecting shaft portion that connects the upper engaging portion and the lower engaging portion so that they can move up and down with each other, The upper engaging portion and the lower engaging portion are fitted together at a connecting position where they both abut against the edge portion, and the claw portion and claw receiving portion prevent the upper engaging portion and the lower engaging portion from moving up and down. A biasing member that biases the claw portion in the direction of fitting it into the claw receiving portion, The system includes a lock release operator that allows manual release of the engaged state of the claw portion and the claw receiving portion, The auxiliary member is provided at the upper end of the ladder support column, which is suspended from the aforementioned edge portion. The aforementioned upper engaging portion extends forward of the connecting frame portion that is horizontally installed at the upper end of the support column, The lower engaging portion is a connecting bracket that extends forward of the sliding frame portion and is connected to the connecting frame portion so as to be vertically slidable.
4. A connecting bracket for connecting an auxiliary member to the top plate of a work platform, An upper engaging portion that abuts against the edge of the top plate from above, A lower engaging portion is positioned opposite to the upper engaging portion at a lower position below it and contacts the edge portion from below, A connecting shaft portion that connects the upper engaging portion and the lower engaging portion so that they can move up and down with each other, The upper engaging portion and the lower engaging portion are fitted together at a connecting position where they both abut against the edge portion, and the claw portion and claw receiving portion prevent the upper engaging portion and the lower engaging portion from moving up and down. A biasing member that biases the claw portion in the direction of fitting it into the claw receiving portion, The system includes a lock release operator that allows manual release of the engaged state of the claw portion and the claw receiving portion, The upper engaging portion is a connecting bracket having a substantially cylindrical upper engaging projection that can be fitted into an upper engaging hole provided on the upper surface of the end edge.
5. The connecting bracket according to claim 4, wherein the lower engaging portion has a substantially cylindrical lower engaging projection that can be fitted into a lower engaging hole provided on the lower surface of the end edge.
6. A tabletop comprising: a tabletop; legs supporting the tabletop from below; a handrail and a ladder as auxiliary members; and connecting brackets for connecting the auxiliary members to the tabletop, The aforementioned connecting bracket is An upper engaging portion that abuts against the edge of the top plate from above, A lower engaging portion is positioned opposite to the upper engaging portion at a lower position below it and contacts the edge portion from below, A connecting shaft portion that connects the upper engaging portion and the lower engaging portion so that they can move up and down with each other, The upper engaging portion and the lower engaging portion are fitted together at a connecting position where they both abut against the edge portion, and the claw portion and claw receiving portion prevent the upper engaging portion and the lower engaging portion from moving up and down. A biasing member that biases the claw portion in the direction of fitting it into the claw receiving portion, A scaffolding unit having a lock release operator that can manually release the engaged state of the claw portion and the claw receiving portion.
7. The scaffolding unit according to claim 6, wherein a reinforcing frame with higher rigidity than the top plate is provided at the contact position of the upper engaging portion on the edge portion.
8. The handrail and the ladder each have a pair of connecting brackets arranged at a predetermined interval, The scaffolding unit according to claim 6, wherein the top plate has a plurality of first engagement holes arranged at the spacing of the connecting brackets of the handrail, and a plurality of second engagement holes arranged at the spacing of the connecting brackets of the ladder, into which the upper engagement projections provided on the upper engagement portion can be fitted.