Fall prevention device
The fall prevention device addresses the lack of dual-sided installation in existing ladder fixing devices by using a long flat plate and ladder-improved plates secured with bolts and screws, ensuring the ladder's stability and safety on both sides.
Patent Information
- Application Number
- JP2023203578
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-12-01
- Publication Date
- 2025-06-12
AI Technical Summary
Existing ladder fixing devices lack dual-sided installation, leaving ladders without adequate fall prevention measures on both sides.
A fall prevention device is configured with a long flat plate installed on a roof, featuring circular and rectangular holes for bolts and screws, which secure ladder-improved plates on both sides of the ladder, ensuring stability and safety.
The device effectively prevents ladder falls by providing secure attachment points on both sides of the ladder, enhancing safety and stability during use.
Smart Images
Figure 2025088834000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a fall prevention device and provides safety measures for a movable ladder.
Background Art
[0002] Conventionally, a ladder fixing device has been known (Patent Document 1).
[0003] This ladder fixing device has a clamping plate 20 provided with a contact portion 21, and pin holes 23A and 23B are respectively provided at both ends of the contact portion 21 (see FIG. 4 of JP-A-2013-199824). The movable frame 40 is provided with a pair of pins 42 to be inserted into the respective pin holes 23A and 23B. The pair of pins 42 protrude by operating a set knob 43, and by protruding the pins 42, they are inserted into the pin holes 23A and 23B to attach the clamping plate 20 to the movable frame 40. The clamping plate 20 has a plurality of clamping plates 20A and 20B with different clamping widths, and any one of the clamping plates 20 is attached to the movable frame 40 for use.
Prior Art Documents
Patent Documents
[0004]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0005] By the way, Patent Document 1, JP-A-2013-199824 (see FIG. 6), shows a state where a ladder is attached to the eaves of a house by the ladder fixing device. The clamping plate 20 is pulled up toward the receiving plate 10 side and presses the area under the eaves from below. The receiving plate 10 and the clamping plate 20 sandwich the eaves, preventing the lateral sliding of the ladder 100. However, there is only one ladder fixing device. There is no ladder fixing device on both sides.
[0006] The present invention has been made in view of the above-described conventional problems, and provides safety measures for a fall prevention device 32 and a long flat plate 10 fixed to a ladder 33 with bolts B and screws B'.
Means for Solving the Problems
[0007] To achieve the above object, the present invention First, the long flat plate (10) is installed on the roof (36), the long flat plate (10) has holes (6'), the flat plate (12) has holes (17), and the long flat plate (10) and the holes (6') are installed with bolts (B) and screws (B'). The flat plate (12) has a left circular flat plate (13) and a right circular flat plate (14) installed on both sides. The flat plate (1) has a left circular flat plate (2) and a right circular flat plate (3) installed on both sides, and they are tightened facing each other. The flat plate (1) has a hole (7) horizontally adjacent to the right circular flat plate (2). The right circular flat plate (13) of the flat plate (12) has one hole (18), and a circular hole (19) is between the edge (13') and the hole (18). The hole (7) and the hole (18) are tightened facing each other with a bolt (B) and a screw (B'). The circular hole (19) and the hole (7) are tightened to the depth with a bolt (B) and a screw (B') facing each other. The flat plate (1) has a hole (8) horizontally adjacent to the left circular flat plate (3). The flat plate (12) has a left circular flat plate (14) with one hole (21), and a circular hole (22) is between the edge (14') and the hole (21). The hole (8) and the hole (21) are tightened facing each other with a bolt (B) and a screw (B'). The circular hole (22) and the hole (8) are tightened to the depth with a bolt (B) and a screw (B') facing each other. The flat plate (1) has a hole (6), and a ladder-improved plate (30) is on its right side with a hole (24), and they are tightened facing each other with a bolt (B) and a screw (B'). A ladder (33) is installed on the right side of the ladder-improved plate (30). The flat plate (1) has a hole (6), and a ladder-improved plate (31) is on its left side with a hole (26), and they are tightened facing each other with a bolt (B) and a screw (B'). A ladder (33) is installed on the left side of the ladder-improved plate (31), thus constituting a fall prevention device.
[0008] The long flat plate (10) is installed on the roof (36), and the hole (6’) is installed. The flat plate (12) has the circular flat plates (13) and (14) installed on both sides, and the hole (17) is installed. The flat plate (12) has the holes (17) and (6’) tightened with the bolts (B) and nuts (B’) facing each other. The flat plate (1) has the circular flat plate (2) and the hole (7) horizontally. The circular flat plate (13) of the flat plate (12) has one hole (18), and the circular hole (19) is between the edge (13’) and the hole (18). The holes (7) and (18) are tightened with the bolts (B) and nuts (B’) facing each other. The circular hole (19) and the hole (7) are tightened with the bolts (B) and nuts (B’) to the back, facing each other. The flat plate (1) has a hole (6), and there is the modified ladder plate (30), and there is the hole (24), tightened with the bolts (B) and nuts (B’) facing each other. The ladder (33) is installed on the right side of the right modified ladder plate (30). The flat plate (1) has a hole (6), and there is the left modified ladder plate (31), and there is the hole (26), tightened with the bolts (B) and nuts (B’) facing each other. A fall prevention device is configured with the ladder (33) installed on the left side of the modified ladder plate (31).
[0009] Second, the flat plate (1) has a rectangular hole (5), and the flat plate (12) has a rectangular hole (16), and it is constituted by the fall prevention device described in the first item.
[0010] The flat plate (1) has a rectangular hole (5), and the flat plate (12) has a rectangular hole (16) for weight reduction.
[0011] Third, the flat plate (12) has convex flat plates (20’) on both the upper and lower sides, and the flat plate (1) has convex flat plates (1’) on both the upper and lower sides, and it is constituted by the fall prevention device described in the first or second item.
[0012] The above flat plate (12) has the convex flat plates (20') on both the upper and lower sides, and the above flat plate (1) has the convex flat plates (1') on both the upper and lower sides, for reinforcement.
Advantages of the Invention
[0013] As described above, in the present invention, the long flat plate (10) is installed on the roof (36), the hole (6') is installed, the flat plate (12) has the circular flat plates (13) and (14) installed on both sides, the hole (17) is installed, the flat plate (12) has the holes (17) and (6') tightened with the bolts (B) and nuts (B') facing each other, the flat plate (1) has the circular flat plate (2) and the hole (7) horizontally, the circular flat plate (13) of the flat plate (12) has one hole (18), the circular hole (19) is between the edge (13') and the hole (18), the holes (7) and (18) are tightened with the bolts (B) and nuts (B') facing each other, the circular hole (19) and the hole (7) are tightened with the bolts (B) and nuts (B') to the deepest with them facing each other, the flat plate (1) has the hole (6), the ladder-improved plate (30) thereon, the hole (24), tightened with the bolts (B) and nuts (B') facing each other, the ladder (33) is installed on the right side of the right ladder-improved plate (30), the flat plate (1) has the hole (6), the ladder-improved plate (31) on the left side, the hole (26), tightened with the bolts (B) and nuts (B') facing each other, and the ladder (33) is installed on the left side of the ladder-improved plate (31). A fall prevention device is configured in terms of safety.
[0014] The above flat plate (1) has the rectangular hole (5), and the above flat plate (12) has the rectangular hole (16), for weight reduction.
[0015] The above flat plate (12) has the convex flat plates (20') on both the upper and lower sides, and the above flat plate (1) has the convex flat plates (1') on both the upper and lower sides, for reinforcement.
Brief Description of the Drawings
[0016]
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Embodiments for Carrying Out the Invention
[0017] Hereinafter, the ladder fixing device 32 according to the present invention will be described in detail.
[0018] The circular biconvex shape 9 in Fig. 1 consists of: (a) a rectangular flat plate 1 in the bottom view, (b) a circular flat plate 2 in the left side view (the circular flat plate 2 on the left side in the side view of (d)), (c) a circular flat plate 3 in the right side view (the circular flat plate 3 on the right side in the side view of (d)), and the side view of (d) shows a circular biconvex shape 4 formed by the circular flat plate 2 on the left side and the circular flat plate 3 on the right side. Also, convex flat plates 1', 1' (in the bottom view of (a)) are located on both the upper and lower sides of the flat plate 1. The convex flat plates 1', 1' are for reinforcement. Moreover, the flat plate 1 has a central rectangular hole 5 (in the bottom view of (a)). This is for weight reduction of the flat plate 1 (the rectangular hole 5).
[0019] Also (see Fig. 1), on both sides of the rectangular hole 5, there are holes 6, 6 (6, 6), with four vertical holes. In (b), the holes 7, 7 in the circular flat plate 2 in the left side view have two horizontal holes. In (c), the holes 8, 8 in the circular flat plate 3 in the left side view have two horizontal holes. Also, in the up - down direction, the flat plate 1 has "lower part" and "upper part", and in the left - right direction, the circular flat plate 2 has "left end" and "right end", and in the left - right direction, the circular flat plate 3 has "left end" and "right end".
[0020] Fig. 3 shows: (a) in the plan view, a long flat plate 10, (b) in the side view, the long flat plate 10, and both holes 6', 6' (6', 6') have four vertical holes. Also, in the up - down direction, the flat plate 10 has "upper part" and "lower part".
[0021] The circular biconvex shape 11 in Fig. 2 consists of: (a) a rectangular flat plate 12 in the bottom view, (b) a circular flat plate 13 in the left side view (the circular flat plate 13 on the left side in the side view of (d)), (c) a circular flat plate 14 in the right side view (the circular flat plate 14 on the right side in the side view of (d)), and the side view of (d) shows a circular biconvex shape 15 formed by the circular flat plate 13 on the left side and the circular flat plate 14 on the right side. Also, convex flat plates 20', 20' (in the bottom view of (a)) are located on both the upper and lower sides of the flat plate 12. The convex flat plates 20', 20' are for reinforcement.
[0022] Also (see Fig. 2), the above-mentioned flat plate 12 has a central rectangular hole 16 at its center ((a) bottom view). This is for weight reduction of the above-mentioned flat plate 12 (the above-mentioned rectangular hole 16). Also, on both sides of the above-mentioned rectangular hole 16, there are holes 17, 17 (17, 17), and there are four vertical holes. The left side view in (b) shows that the hole 18 in the above-mentioned circular flat plate 13 has one hole (1 hole). The left side view in (c) shows that the hole 21 in the above-mentioned circular flat plate 14 has one hole (1 hole). Also, there is a circular hole 19 on the left side of the above-mentioned circular flat plate 13 between the edge 13' and the above-mentioned hole 18. There is a circular hole 22 on the right side of the above-mentioned circular flat plate 14 between the edge 14' and the above-mentioned hole 21. Also, vertically, the above-mentioned flat plate 12 has "upper" and "lower", and horizontally, the above-mentioned circular flat plate 13 has "left end" and "right end", and horizontally, the above-mentioned circular flat plate 14 has "left end" and "right end".
[0023] As shown in Fig. 6, the holes 6', 6' in the long above-mentioned flat plate 10 have two vertical holes. The above-mentioned circular double-convex shape 11 of the rectangle has the above-mentioned flat plate 12 (the left side is the above-mentioned rectangular hole 16), and the right side has the holes 17, 17 with two vertical holes. The holes 6', 6' and the holes 17, 17 coincide. Two bolts B enter the holes 6', 6' and the holes 17, 17 from the bottom. From the upper part of the above-mentioned flat plate 12, two screws B' tighten the holes 6', 6' and the holes 17, 17 from the tips B" of the two bolts B and are screwed in. The above-mentioned flat plate 12 has the above-mentioned convex flat plate 20' on the lower side.
[0024] As shown in Fig. 7, the holes 6', 6' in the long above-mentioned flat plate 10 have two vertical holes. The above-mentioned circular double-convex shape 11 of the rectangle has the above-mentioned flat plate 12 (the right side is the above-mentioned rectangular hole 16), and the left side has the holes 17, 17 with two vertical holes. The holes 6', 6' and the holes 17, 17 coincide. Two bolts B enter the holes 6', 6' and the holes 17, 17 from the bottom. From the upper part of the above-mentioned flat plate 12, two screws B' tighten the holes 6', 6' and the holes 17, 17 from the tips B" of the two bolts B and are screwed in. The above-mentioned flat plate 12 has the above-mentioned convex flat plate 20' on the lower side.
[0025] As shown in Fig. 6, the circular flat plate 3 on the right side of the flat plate 1 (the left side is the rectangular hole 5) and the circular flat plate 14 on the right side of the flat plate 12 are tightened facing each other. The flat plate 12, the circular flat plate 14 on the right side and the circular flat plate 13 on the left side, the flat plate 12 is slightly longer (see Fig. 6 and Fig. 7). The hole 21 of the circular flat plate 14 and the hole 8 of the circular flat plate 3 are aligned. The hole 21 and the hole 8 are tightened facing each other with the bolt B (one) with the tip B” of the bolt B (from the “right end”) and the screw B’ (one) (from the “left end”). Also, the circular hole 22 of the circular flat plate 14 and the hole 8 of the circular flat plate 3 are aligned. Also, the circular hole 22 of the circular flat plate 14 and the hole 8 of the circular flat plate 3 are tightened facing each other with the bolt B (one) with the tip B” of the bolt B (from the “right end”) and the screw B’ (one) (from the “left end”). The convex flat plate 1’ of the flat plate 1 is on the lower side.
[0026] As shown in Fig. 7, the circular flat plate 2 on the left side of the flat plate 1 (the rectangular hole 5 on the right side) and the circular flat plate 13 on the left side of the flat plate 12 are tightened facing each other. The flat plate 12, the circular flat plate 14 on the right side and the circular flat plate 13 on the left side, the flat plate 12 is slightly longer (see Fig. 6 and Fig. 7). The hole 18 of the circular flat plate 13 and the hole 7 of the circular flat plate 2 are aligned. The hole 18 and the hole 7 are tightened facing each other with the bolt B (one) with the tip B” of the bolt B (from the “left end”) and the screw B’ (one) (from the “right end”). Also, the circular hole 19 of the circular flat plate 13 and the hole 7 of the circular flat plate 2 are aligned. Also, the circular hole 19 of the circular flat plate 13 and the hole 7 of the circular flat plate 2 are tightened facing each other with the bolt B (one) with the tip B” of the bolt B (from the “right end”) and the screw B’ (one) (from the “left end”). The convex flat plate 1’ of the flat plate 1 is on the lower side.
[0027] Figure 4(a) is a bottom view, (b) is a side view, and (c) is a cross-sectional view (refer to the X-X line cross-sectional view of (a)). In Figure 4(a), for the improved ladder plate 30, the holes 24, 24 in the flat plate 20 ((c): the "upper part" of the flat plate 20 is the "front", and the "lower part" of the flat plate 20 is the "back") are vertical holes (two). The right angle of the flat plate 20 is at the flat plate 37 (refer to the cross-sectional view of Figure 4(c)). The right angle of the flat plate 37 is at the bottom plate 38 (refer to the cross-sectional view of Figure 4(c)). Also, the right angle of the bottom plate 38 is at one-end flat plate 39 (refer to the cross-sectional view of Figure 4(c)).
[0028] Figure 5(a) is a bottom view, (b) is a side view, and (c) is a cross-sectional view (refer to the Y-Y line cross-sectional view of (a)). In Figure 5(a), for the improved ladder plate 31, the holes 26, 26 in the flat plate 25 ((c): the "upper part" of the flat plate 25 is the "front", and the "lower part" of the flat plate 25 is the "back") are vertical holes (two). The right angle of the flat plate 25 is at the flat plate 29 (refer to the cross-sectional view of Figure 4(c)). The right angle of the flat plate 29 is at the bottom plate 27 (refer to the cross-sectional view of Figure 4(c)). Also, the right angle of the bottom plate 27 is at one-end flat plate 28 (refer to the cross-sectional view of Figure 4(c)).
[0029] As shown in Figure 6, for the fall prevention device 32, the holes 24, 24 in the flat plate 20 coincide with the holes 6, 6 in the flat plate 1. The flat plate 20 is installed at the "right end" on the flat plate 1. Also, the flat plate 37 is installed at the right angle of the flat plate 20. Also, the bottom plate 38 is installed at the right angle of the flat plate 37. There, with two bolts B, at the holes 24, 24 and the holes 6, 6 in the flat plate 1, at the tips B” of the two bolts B (the "lower part" of the flat plate 20 is the "back"), with two nuts B’ (the "upper part" of the flat plate 20 is the "front"), tighten them face to face. There, the flat plate 37, the bottom plate 38, and the flat plate 39 (the improved ladder plate 30) have the right-side ladder 33 installed. The convex flat plate 1’ of the flat plate 1 is on the lower side. The convex flat plate 20’ of the flat plate 12 is on the lower side.
[0030] As shown in Fig. 7, the fall prevention device 32 has the holes 26, 26 in the flat plate 25 aligned with the holes 6, 6 in the flat plate 1. The flat plate 25 is installed at the "left end" on the flat plate 1. Also, the flat plate 29 is installed at a right angle to the flat plate 25. Further, the bottom plate 27 is installed at a right angle to the flat plate 29. There, with bolts B (2) (the "lower part" of the flat plate 25 is the "back"), the tips B” of the bolts B (2) are used to screw with the holes 26, 26 in the flat plate 25 and the holes 6, 6 in the flat plate 1, and nuts B’ (2) (the "upper part" of the flat plate 25 is the "front") are used to tighten them in a facing manner. There, the flat plate 29, the bottom plate 27, and the flat plate 28 (the modified ladder plate 31) have the left ladder 33 installed on them. The convex flat plate 1’ of the flat plate 1 is on the lower side. The convex flat plate 20’ of the flat plate 12 is on the lower side.
[0031] As shown in Fig. 6, the right ladder 33 is installed. The footrest 34 of the ladder 33 is installed horizontally. As shown in Fig. 7, the left ladder 33 is installed. The footrest 34 of the ladder 33 is installed horizontally.
[0032] As shown in Fig. 8, it is a side view of the right side of the fall prevention device 32. The roof 36 of the fall prevention device 32 leans against the building 35. The flat plate 10 leans against the roof 36 at a right angle to the fall prevention device 32. And the circular flat plate 14 on the right side of the flat plate 12 and the circular flat plate 3 on the right side of the flat plate 1 have the holes 8, 8, the circular hole 22, and the hole 21 aligned. The right circular flat plate 14 has the circular hole 22, the hole 8 in the circular flat plate 3, the tip B” (right end) of the bolt B (1) (left end), and the nut B’ (1) (right end) are tightened in a facing manner (see Fig. 6). The tip B“ (right end) of the bolt B (1) (left end) reaches to the depth of the circular hole 22 (up to the upper part of the circular hole 22), and the nut B’ (1) (right end) is tightened in a facing manner (see Figs. 8 and 6). The circular flat plate 14 has the hole 21, and the circular flat plate 3 of the flat plate 1 has the hole 8 aligned. Also, the tip B” (left end) of the bolt B (1) (right end) and the nut B’ (1) (left end) are tightened in a facing manner (see Figs. 8 and 6).
[0033] As shown in Fig. 8, the improved ladder plate 30 is provided, and the ladder 33 on the right side is installed. On the flat plate 20, the ladder 33 on the right side of the flat plate 37, the bottom plate 38, and the flat plate 39 is installed. The bolts B, B are tightened in a facing manner with the holes 24, 24 in the flat plate 20 and the holes 6, 6 in the flat plate 1 (see Figs. 6 and 8).
[0034] Fig. 9 shows a side view of the left side of the fall prevention device 32. The roof 36 of the fall prevention device 32 and the building 35 are attached to the fall prevention device 32. The flat plate 10 is attached to the roof 36 at a right angle to the fall prevention device 32. And the circular flat plate 13 on the left side of the flat plate 12 and the circular flat plate 2 on the left side have the holes 7, 7, and the circular hole 19 on the left side and the hole 18 are aligned. The circular flat plate 13 of the circular hole 19, the hole 7 of the circular flat plate 2, the tip B” (left end) of the bolt B (one) (right end), and the screw B’ (one) (left end) are tightened in a facing manner (see Figs. 9 and 7).
[0035] The bolt B (one) (right end) (see Figs. 9 and 7) reaches to the back of the circular hole 19 (to the upper part of the circular hole 19), the tip B” (left end), and the screw B’ (one) (left end) are tightened in a facing manner (see Figs. 9 and 7). The circular flat plate 13 and the circular flat plate 2 of the flat plate 1 have the holes 18 and 7 aligned. Also, the tip B” (left end) of the bolt B (one) (right end) and the screw B’ (one) (left end) are tightened in a facing manner (see Figs. 9 and 7).
[0036] Fig. 9 shows the improved ladder plate 31, and the ladder 33 on the left side is installed. On the flat plate 25, the ladder 33 on the left side of the flat plate 29, the bottom plate 27, and the flat plate 28 is installed. The bolts B, B are tightened in a facing manner with the holes 26, 26 in the flat plate 25 and the holes 6, 6 in the flat plate 1 (see Figs. 7 and 9).
[0037] The operation will be described (see Fig. 10). The upper flat plate 10 has vertical holes (4 in number) in the holes 6’, 6’ (6’, 6’). The upper flat plate 12 has vertical holes (4 in number) in the holes 17, 17 (17, 17). With the bolts B (4 in number), the holes 6’, 6’ (6’, 6’), the holes 17, 17 (17, 17), and with the screws B’ (4 in number), they are tightened in a facing manner, and the screws B’ (4 in number) are screwed in with the tips B”. The circular flat plate 13 on the left side and the circular flat plate 14 on the right side protrude (see FIGS. 7 and 6).
[0038] The upper flat plate 1 faces each other, the circular flat plate 3 on the right side and the circular flat plate 2 on the left side protrude (see FIGS. 6 and 7). The circular flat plate 3 on the right side of the upper flat plate 1, the circular flat plate 2 on the left side, the circular flat plate 14 on the right side of the upper flat plate 12, and the circular flat plate 13 on the left side are tightened in a facing manner (see FIGS. 6 and 7).
[0039] The circular hole 19 and the hole 7 are tightened with the bolt B (1 in number) and the screw B’ (1 in number) in a facing manner. The tip B” (left end) of the bolt B (1 in number) (right end) and the screw B’ (1 in number) (left end) are tightened in a facing manner (see FIG. 7). To the depth of the circular hole 19 (to the upper part of the circular hole 19), the bolt B (1 in number) (left end), the tip B” (right end), and the screw B’ (right end) are tightened in a facing manner (see FIGS. 7 and 9). The hole 18 and the hole 7 are tightened with the tip B” (right end) of the bolt B (1 in number) (left end) and the screw B’ (1 in number) (right end) in a facing manner (see FIGS. 7 and 9).
[0040] The circular hole 22 and the hole 8 are tightened with the bolt B (1 in number) and the screw B’ (1 in number) in a facing manner. The tip B” (right end) of the bolt B (1 in number) (left end) and the screw B’ (1 in number) (right end) are tightened in a facing manner (see FIG. 6). To the depth of the circular hole 22 (to the upper part of the circular hole 22), the bolt B (1 in number) and the screw B’ are tightened in a facing manner (see FIGS. 6 and 8). The hole 21 and the hole 8 are tightened with the tip B” (left end) of the bolt B (1 in number) (right end) and the screw B’ (1 in number) (left end) in a facing manner (see FIGS. 6 and 8).
[0041] The back surface of the above-mentioned flat plate 1 and the above-mentioned flat plate 20 face each other, and the above-mentioned holes 24, 24 and the above-mentioned bolts B (two) (inside) and (the tip B”) (outside) of the above-mentioned holes 6, 6, and the above-mentioned screws B’ (two) (outside) are faced and tightened and screwed in (see Fig. 6). The back surface of the above-mentioned flat plate 1 and the above-mentioned flat plate 25 face each other, and the above-mentioned holes 26, 26 and the above-mentioned bolts B (two) (inside) and (the tip B”) (outside) of the above-mentioned holes 6, 6, and the above-mentioned screws B’ (two) (outside) are faced and tightened and screwed in (see Fig. 7).
[0042] The above-mentioned ladders 33, 33 on the left and right sides have the above-mentioned footrests 34, 34, 34 installed horizontally (see Figs. 6, 7, and 10).
[0043] Fig. 10 is a perspective view of the above-mentioned fall prevention device 32. The above-mentioned fall prevention device 32 is installed on the above-mentioned roof 36. The long above-mentioned flat plate 10 is installed on the above-mentioned roof 36. The above-mentioned bolts B (four) (lower part) of the long above-mentioned flat plate 10 and (the tip B”) (upper part), the above-mentioned two holes 6’, 6’, the above-mentioned holes 17, 17 of the above-mentioned flat plate 12, and the above-mentioned screws B’ (four) (upper part) are faced and screwed in (see Figs. 6, 7, and 10). Also, the above-mentioned flat plate 12, the above-mentioned circular flat plate 14 on the right side, and the above-mentioned circular flat plate 13 on the left side are tightened with the above-mentioned flat plate 1, the above-mentioned circular flat plate 2 on the left side, and the above-mentioned circular flat plate 3 on the right side facing each other (see Figs. 6, 7, and 10).
[0044] To the depth of the above-mentioned circular hole 19 of the above-mentioned circular flat plate 13 on the left side (to the upper part of the above-mentioned circular hole 19), the above-mentioned hole 7 of the above-mentioned circular flat plate 2, the above-mentioned bolt B (one) (right end) and (the tip B”) (left end), and the above-mentioned screw B’ (one) (left end) (the above-mentioned screw B’ (one)) are faced and tightened (see Figs. 7 and 9). The above-mentioned hole 7 of the above-mentioned circular flat plate 2 and the above-mentioned hole 18 of the above-mentioned circular flat plate 13 are tightened with the above-mentioned bolt B (one) (left end) and (the tip B”) (right end), and the above-mentioned screw B’ (one) (right end) facing each other (see Figs. 7 and 9).
[0045] To the depth of the circular hole 22 (to the upper part of the circular hole 22) of the circular flat plate 14 on the right side, the hole 8 of the circular flat plate 3, the bolt B (one) (left end) (the tip B”) (right end), and the screw B’ (one) (right end) (the screw B’ (one)) are tightened facing each other (see FIGS. 6 and 8). The hole 8 of the circular flat plate 3 and the circular flat plate 14 are tightened facing each other with the hole 21, the bolt B (one) (right end) and (the tip B”) (left end), and the screw B’ (one) (left end) (see FIGS. 6 and 8).
[0046] Install the ladder-improved plate 30 to the right side of the flat plate 1 (see FIGS. 8 and 10). Install the ladder-improved plate 31 to the left side of the flat plate 1 (see FIGS. 9 and 10).
[0047] The holes 6, 6 of the flat plate 1 and the holes 24, 24 of the ladder-improved plate 30 (the flat plate 20) are tightened facing each other with the ladder 33 on the right side, the bolts B (two) (back) and (the tips B” (two)) (front), and the screws B’ (two) (front) (see FIGS. 6, 8, and 10).
[0048] The holes 6, 6 of the flat plate 1 and the holes 26, 2 of the ladder-improved plate 31 (the flat plate 25) are tightened facing each other with the ladder 33 on the left side, the bolts B (two) (back) and (the tips B” (two)) (front), and the screws B’ (two) (front) (see FIGS. 7, 9, and 10).
[0049] The right-angled flat plate 37, the bottom plate 38, and the flat plate 39 of the flat plate 20 are tightening the ladder 33 on the right side (see FIGS. 6, 8, and 10). The holes 6, 6 of the flat plate 1 and the holes 26, 26 of the ladder-improved plate 31 (the flat plate 25) are tightened facing each other with the ladder 33 on the left side, the bolts B (two) and (the tips B”), and the screws B’ (two) (see FIGS. 7, 9, and 10).
[0050] Also, the footrests 34, 34, 34 are installed horizontally on the ladder 33 on the left side and the ladder 33 on the right side (see FIG. 10).
[0051] First, the long flat plate (10) is installed on the roof (36). The long flat plate (10) has holes (6’). The flat plate (12) has a hole (17), and the long flat plate (10) has a hole (6’). They are installed with bolts (B) and screws (B’). The flat plate (12) has a circular flat plate (13) on the left side and a circular flat plate (14) on the right side, which are installed on both sides. The flat plate (1) has a circular flat plate (2) on the left side and a circular flat plate (3) on the right side, which are installed on both sides and are tightened face to face. The flat plate (1) has a hole (7) horizontally with the circular flat plate (2) on the right side. The circular flat plate (13) on the right side of the flat plate (12) has one hole (18). A circular hole (19) is between the edge (13’) and the hole (18). The hole (7) and the hole (18) are tightened face to face with bolts (B) and screws (B’). The circular hole (19) and the hole (7) are tightened to the depth with bolts (B) and screws (B’) face to face. The flat plate (1) has a hole (8) horizontally with the circular flat plate (3) on the left side. The flat plate (12) has a circular flat plate (14) on the left side with one hole (21). A circular hole (22) is between the edge (14’) and the hole (21). The hole (8) and the hole (21) are tightened face to face with bolts (B) and screws (B’). The circular hole (22) and the hole (8) are tightened to the depth with bolts (B) and screws (B’) face to face. The flat plate (1) has a hole (6), and there is a modified ladder plate (30) on its right side with a hole (24). They are tightened face to face with bolts (B) and screws (B’). A ladder (33) on the right side of the modified ladder plate (30) is installed on its right side. The flat plate (1) has a hole (6), and there is a modified ladder plate (31) on its left side with a hole (26). They are tightened face to face with bolts (B) and screws (B’). A fall prevention device is configured with a ladder (33) on the left side of the modified ladder plate (31) installed.
[0052] Second, the flat plate (1) has a rectangular hole (5), and the flat plate (12) has a rectangular hole (16). It is constituted by the first fall prevention device.
[0053] Third, the flat plate (12) has convex flat plates (20’) on both the upper and lower sides, and the flat plate (1) has convex flat plates (1’) on both the upper and lower sides. It is constituted by the fall prevention device described in the first or second item.
[0054] As described above, in the present invention, the long flat plate (10) is installed on the roof (36), the hole (6’) is installed, the flat plate (12) has the circular flat plates (13) and (14) installed on both sides, the hole (17) is installed, and the flat plate (12) has the holes (17) and (6’) tightened with the bolts (B) facing the screws (B’). The flat plate (1) has the circular flat plate (2) and the hole (7) horizontally. The circular flat plate (13) of the flat plate (12) has one hole (18), and the circular hole (19) is between the edge (13’) and the hole (18). The holes (7) and (18) are tightened with the bolts (B) facing the screws (B’). The circular hole (19) and the hole (7) are tightened with the bolts (B) facing the screws (B’) to the back. The flat plate (1) has the hole (6), the ladder-improved plate (30), the hole (24), and is tightened with the bolts (B) facing the screws (B’). The ladder (33) is installed on the right side of the right ladder-improved plate (30). The flat plate (1) has the hole (6), the left ladder-improved plate (31), the hole (26), and is tightened with the bolts (B) facing the screws (B’). A fall prevention device with the ladder (33) installed on the left side of the ladder-improved plate (31) is configured in terms of safety.
[0055] The flat plate (1) has the rectangular hole (5), and the flat plate (12) has the rectangular hole (16) for weight reduction.
[0056] The flat plate (12) has convex flat plates (20’) on both the upper and lower sides, and the flat plate (1) has convex flat plates (1’) on both the upper and lower sides for strengthening.
Industrial Applicability
[0057] In the present invention, the above-mentioned fall prevention device 32 is installed on the above-mentioned roof 36 with the long above-mentioned flat plate 10, and has stability. The above-mentioned flat plate 1 has the above-mentioned rectangular hole 5, the above-mentioned flat plate 12 has the above-mentioned rectangular hole 16, and is constituted by the above-mentioned fall prevention device 32.
Explanation of Signs
[0058] 1 Flat plate 2 Circular flat plate 3 Circular flat plate 5 Rectangular hole 6 Hole 6’ Hole 7 Hole 8 Hole 12 Flat plate 13 Circular flat plate 13’ Edge 14 Circular flat plate 14’ Edge 16 Rectangular hole 17 Hole 18 Hole 19 Circular hole 20 Flat plate 21 Hole 22 Circular hole 24 Hole 25 Flat plate 26 Hole 27 Bottom plate 28 Flat plate 29 Flat plate 30 Ladder-improved plate 31 Ladder-improved plate 36 Roof 37 Flat plate 38 Bottom plate 39 Flat plate B Bolt B’ Screw
Claims
1. The long flat plate (10) is installed on the roof (36). The long flat plate (10) has holes (6') installed. The flat plate (12) has holes (17), and the long flat plate (10) has holes (6'). They are installed with the screws (B') of the bolts (B). The flat plate (12) has a circular flat plate (13) on the left side and a circular flat plate (14) on the right side, which are installed on both sides. The flat plate (1) has a circular flat plate (2) on the left side and a circular flat plate (3) on the right side, which are installed on both sides and are tightened facing each other. The flat plate (1) has the circular flat plate (2) on the right side and a hole (7) horizontally. The circular flat plate (13) on the right side of the flat plate (12) has one hole (18). A circular hole (19) is between the edge (13') and the hole (18). The hole (7) and the hole (18) are tightened facing each other with the screw (B') by the bolt (B). The circular hole (19) and the hole (7) are tightened to the depth with the screw (B') by the bolt (B) facing each other. The flat plate (1) has the circular flat plate (3) on the left side with a hole (8) horizontally. The flat plate (12) has the circular flat plate (14) on the left side with one hole (21). A circular hole (22) is between the edge (14') and the hole (21). The hole (8) and the hole (21) are tightened facing each other with the screw (B') by the bolt (B). The circular hole (22) and the hole (8) are tightened to the depth with the screw (B') by the bolt (B) facing each other. The flat plate (1) has a hole (6), and there is an improved ladder plate (30) on its right side with a hole (24). They are tightened facing each other with the screw (B') by the bolt (B). The ladder (33) is installed on the right side of the improved ladder plate (30). The flat plate (1) has a hole (6), and there is an improved ladder plate (31) on its left side with a hole (26). They are tightened facing each other with the screw (B') by the bolt (B). A fall prevention device is installed with the ladder (33) on the left side of the improved ladder plate (31).
2. The flat plate (1) has a rectangular hole (5), and the flat plate (12) has a rectangular hole (16). The fall prevention device according to Claim 1.
3. The flat plate (12) has convex flat plates (20') on both the upper and lower sides, and the flat plate (1) has convex flat plates (1') on both the upper and lower sides. The fall prevention device according to Claim 1 or 2.
Citation Information
Patent Citations
Ladder fixing device
JP2013199824A