Ladder fixture and ladder with spike

Abstract

To provide a user-friendly ladder fixture.SOLUTION: A ladder fixture 3 to be mounted to a support post 21 of a ladder 2 includes: a spike 4; mounting means 5 for mounting the spike 4 to the support post 21 to be turnable about a turning axis C between a use position and a non-use position; and a first toggle clamp 6 for locking the spike 4 at the use position in an unlockable manner. When the spike 4 is in the use position, a tip 41 of the spike 4 faces downward, and when the spike 4 is in the non-use position, the tip 41 of the spike 4 faces upward.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a ladder fixing device and a spiked ladder. [Background technology]

[0002] Ladders are widely used when working at height or moving to high places. However, when a ladder is used by leaning it against the wall of a building, the bottom end of the ladder may slide sideways on the ground, which is dangerous. Therefore, a fixing device has been proposed that prevents the ladder from sliding sideways on the ground by driving spikes into the ground (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-62450 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the fixing device disclosed in Patent Document 1 requires a hammer to fix the spikes into the ground, which makes it difficult to use.

[0005] The present invention aims to provide a ladder fixing device and a spiked ladder that are easy to use. [Means for solving the problem]

[0006] The ladder fixing device of the present invention is attached to a ladder post and comprises a spike, mounting means for mounting the spike to the post so that it can be rotated about a pivot axis between a use position and a non-use position, and a first locking means for releasably locking the spike in the use position, wherein when the spike is in the use position, the tip of the spike faces a first direction, and when the spike is in the non-use position, the tip of the spike faces a second direction opposite to the first direction.

[0007] In addition, the spiked ladder of the present invention comprises the above-mentioned ladder fixing device and a ladder having a support post, wherein the ladder fixing device is attached to the support post, and when the spike is in the use position, the spike extends in the first direction beyond the end of the support post.

[0008] Furthermore, the spiked ladder of the present invention comprises a ladder having a support, a spike, an attachment means for attaching the spike to the support so that it can be rotatably moved between a use position and a non-use position around a pivot axis perpendicular to the longitudinal direction of the support, and a locking means for releasably locking the spike in the use position, wherein when the spike is in the use position, the tip of the spike faces a first direction and extends in the first direction beyond the end of the support, and when the spike is in the non-use position, the tip of the spike faces a second direction opposite to the first direction, and the spike is positioned in the second direction beyond the end of the support. Effect of the Invention

[0009] According to the ladder fixing device and spiked ladder of the present invention, since it is provided with a first locking means for locking the spikes in the use position, it is possible to fix the ladder to the ground by driving the ladder post equipped with the ladder fixing device into the ground without using a hammer. Also, when the spikes are positioned in the non-use position, the tips of the spikes face in the opposite direction to when they are in the use position, so it is possible to prevent the tips of the spikes from protruding from the bottom end of the ladder post and creating a dangerous situation. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a schematic partial front view of the spiked ladder of the present embodiment, showing the spikes locked in the use position. [Diagram 2] FIG. 2 is a schematic partial front view of the spiked ladder of FIG. 1, showing how the spikes rotate about the pivot points. [Diagram 3] FIG. 2 is a schematic partial front view of the spiked ladder of FIG. 1, showing the spikes locked in a non-use position; [Figure 4] 4A is a cross-sectional view taken along line IVa-IVa in FIG. 1, showing a state in which the first toggle clamp is positioned in a clamped state, and FIG. 4B is a cross-sectional view showing a state in which the first toggle clamp shown in FIG. 4A is positioned in a non-clamped state. [Diagram 5] 3A is a cross-sectional view taken along line Va-Va in FIG. 2, showing a state in which the second toggle clamp is positioned in a clamped state, and FIG. 3B is a cross-sectional view showing a state in which the second toggle clamp shown in FIG. 3A is positioned in a non-clamped state. [Figure 6] FIG. 1 is a schematic partial front view of a spiked ladder according to a first variant embodiment of the present invention, in which (a) shows the spikes positioned in the use position, and (b) shows the spikes positioned in the non-use position. [Figure 7] 1 is a schematic partial front view of a spiked ladder according to a second variant embodiment of the present invention, in which (a) shows the spikes in the use position, and (b) shows the spikes in the non-use position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Referring to Fig. 1, a spiked ladder 1 according to this embodiment comprises a ladder 2 and a pair of ladder fixing devices 3 attached to the ladder 2. The ladder 2 comprises a pair of posts 21 arranged in parallel with a gap in the width direction D1, and a plurality of treads 22 suspended between the pair of posts 21, and an anti-slip device 23 is attached to the end of each post 21.

[0012] In the following description, the terms "up" and "down" refer to the up and down directions when the longitudinal direction D2 of the support poles 21 is oriented in the up and down direction as shown in Fig. 1. Furthermore, the ladder 2 is not limited to a single-section ladder, and may be a double-section ladder, a triple-section ladder, a stepladder, a tripod ladder, etc.

[0013] One ladder fixing device 3 is removably attached to the side of one of the pillars 21 near the lower end thereof, and the other ladder fixing device 3 is removably attached to the side of the other pillar 21 near the lower end thereof.

[0014] Each ladder fixture 3 comprises a spike 4, an attachment means 5 for attaching the spike 4 to a post 21, and first and second toggle clamps 6, 7 as first and second locking means. As shown in Fig. 2, the attachment means 5 attaches the spike 4 to the post 21 so as to be rotatable about a pivot axis C, and comprises a flat attachment member 8 and a connecting means 9 for connecting the spike 4 to the attachment member 8, and the attachment member 8 is detachably attached to the post 21 by a fastener (not shown) such as a bolt. The spike 4 is a rod-shaped stake member having a sharp tip 41, and the connecting means 9 connects the spike 4 to the attachment member 8 so as to be rotatable between a use position shown in Fig. 1 and a non-use position shown in Fig. 3.

[0015] More specifically, the connecting means 9 includes a flat first mounting member 91 fixed to the outer surface of the mounting member 8, and a flat second mounting member 92 connected to the first mounting member 91 so as to be rotatable about a pivot axis C. In this embodiment, the first mounting member 91 and the second mounting member 92 are connected to each other by a hinge 93 as a connector. The pivot axis C extends in a front-rear direction D3 (direction perpendicular to the paper surface of FIG. 4 / FIG. 1) perpendicular to the width direction D1 and the up-down direction D2, and the hinge 93 has a pair of wings 93a, 93b connected to each other so as to be rotatable about the pivot axis C. One wing 93a is attached to the outer surface of the first mounting member 91, and the other wing 93b is attached to the outer surface of the second mounting member 92, and the second mounting member 92 is located below the first mounting member 91.

[0016] With this configuration, the second mounting member 92 can rotate around the pivot axis C between the open position shown in FIG. 1 and the closed position shown in FIG. 3. In the open position shown in FIG. 1, the second mounting member 92 is aligned in a straight line with the first mounting member 91 in the longitudinal direction D2 and abuts against the outer surface of the mounting member 8, and in the closed position shown in FIG. 3, the second mounting member 92 faces the first mounting member 91 in the width direction D1.

[0017] Furthermore, the spike 4 is fixed by welding or the like to the outer surface of the second mounting member 92 at a position lower than the blades 93b. As a result, the spike 4 rotates together with the second mounting member 92 about the rotation axis C, and when the second mounting member 92 is positioned in the open position, the spike 4 is positioned in the use position, and when the second mounting member 92 is positioned in the closed position, the spike 4 is positioned in the non-use position.

[0018] 1, the spike 4 extends below the lower end of the support 21, with its tip 41 pointing downward (first direction). On the other hand, when the spike 4 is rotated to the non-use position shown in FIG 3, the spike 4 is positioned above the lower end of the support 21, with its tip 41 pointing upward (second direction).

[0019] 1 and 5, a pair of abutment parts B1 is provided on the outer surface of the first mounting member 91 (only one of the abutment parts B1 is shown in FIG. 1). The pair of abutment parts B1 are provided with a gap in the front-rear direction D3, and the spike 4 positioned in the non-use position is positioned between the pair of abutment parts B1. Each abutment part B1 protrudes a predetermined amount from the outer surface of the first mounting member 91 outward in the width direction D1 (third direction), and when the second mounting member 92 is positioned in the closed position (when the spike 4 is positioned in the non-use position) as shown in FIG. 2 and 5, the second mounting member 92 abuts against the tip of the abutment part B1.

[0020] The first toggle clamp 6 releasably locks the spike 4 in the use position shown in Figure 1, and the second toggle clamp 7 releasably locks the spike 4 in the non-use position shown in Figure 2, as described in more detail below.

[0021] 4, the first toggle clamp 6 is attached to the attachment member 8 via the support base 11, and is configured to be switchable between a clamped state shown in Fig. 4(a) and an unclamped state shown in Fig. 4(b), and includes an operating lever 61, an arm 62 that rotates by operating the operating lever 61, links 63 and 64, a pressing member 65 fixed to the arm 62, and a base 66 attached to the support base 11. The operating lever 61 and the arm 62 are connected by the links 63 and 64, thereby forming a toggle mechanism. Note that the principle of the toggle mechanism is well known, so a detailed description will be omitted.

[0022] When the first toggle clamp 6 is put into the clamped state with the spike 4 positioned in the use position, the pressing member 65 of the first toggle clamp 6 comes into contact with the spike 4 and presses the spike 4 toward the mounting member 8 (post 21), locking the spike 4 in the use position, as shown in Fig. 4(a). When the first toggle clamp 6 is switched into the non-clamped state in this state, the pressing member 65 against the spike 4 is released, as shown in Fig. 4(b), and the lock on the spike 4 is released.

[0023] Similarly, as shown in Fig. 5, the second toggle clamp 7 is attached to the mounting member 8 via the support base 12, is configured to be switchable between a clamped state shown in Fig. 5(a) and a non-clamped state shown in Fig. 5(b), and has an operating lever 71, an arm 72 that rotates by operating the operating lever 71, links 73 and 74, a pressing member 75 fixed to the arm 72, and a base 76 attached to the support base 12. The operating lever 71 and the arm 72 are connected by the links 73 and 74, which constitute a toggle mechanism.

[0024] When the second toggle clamp 7 is put into the clamped state with the spike 4 positioned in the unused position, the pressing member 75 of the second toggle clamp 7 comes into contact with the second mounting member 92 and presses the second mounting member 92 toward the mounting member 8 (the support 21), as shown in Fig. 5(a). As a result, the spike 4 attached to the second mounting member 92 is locked in the unused position. When the second toggle clamp 7 is switched from this state to the non-clamped state, the pressing member 75 against the second mounting member 92 is released, as shown in Fig. 5(b), and the lock on the spike 4 is released.

[0025] In this configuration, when using the ladder 2 with the spikes 4, the spikes 4 are positioned in the use position shown in Fig. 1 and the first toggle clamp 6 is put into the clamped state. This locks the spikes 4 in the use position and prevents the spikes 4 from rotating around the rotation axis C. In this state, the user can hold the ladder 2 and place the ladder 2 on the ground G by driving the spikes 4 into the ground G. When moving the ladder 2, the user can pull the spikes 4 out of the ground G and lift the ladder 2 upward.

[0026] On the other hand, when the spike 4 is not to be used, the first toggle clamp 6 is put into the unclamped state (Fig. 4(b)) to release the lock on the spike 4 and rotate the spike 4 to the unused position (Fig. 3). Next, the second toggle clamp 7 is put into the clamped state (Fig. 5(a)) to lock the spike 4 in the unused position. This prevents the spike 4 from rotating around the rotation axis C.

[0027] Thus, according to this embodiment, the spikes 4 can be driven into the ground G to fix the ladder 2 to the ground G, so that when the ladder 2 is used by leaning it against a wall or the like, the lower end of the support 21 can be effectively prevented from sliding sideways against the ground G, thereby improving the safety of work using the ladder 2.

[0028] In addition, the spike 4 can be firmly locked in the usage position by using the first toggle clamp 6, so that the user can drive the spike 4 into the ground G by slamming the lower end of the support 21 into the ground G, using the ladder 2's own weight as well, without using a hammer or the like.

[0029] Furthermore, when the spike 4 is not in use, the spike 4 can be locked in a non-use position by the second toggle clamp 7, so that the spike 4 does not get in the way and the tip of the spike 4 does not protrude from the tip of the support 21, creating a dangerous situation.

[0030] Since toggle clamps 6, 7 are used as the first and second locking means, the spike 4 can be locked and unlocked by a simple lever operation, making it easy to use.

[0031] 4 and 5, the first and second toggle clamps 6, 7 are not limited to those shown in Fig. 4 and 5, and may be toggle clamps of other types using a toggle mechanism. In this embodiment, the first and second toggle clamps 6, 7 are used as the first and second locking means, but the first and second locking means are not limited to those using toggle clamps, and may be fasteners such as bolts, snap locks, and latches, as long as they can lock the spikes 4 in the use position and the non-use position.

[0032] Here, a first modified embodiment using bolts as the first and second locking means will be described. With reference to Fig. 6, a ladder fixture 103 according to this modified embodiment has bolts 106, 107 instead of the first and second toggle clamps 6, 7. Also, the second mounting member 92 is provided with a screw hole 92a and a screw hole 92b, the mounting member 8 is provided with a screw hole 8a, and the first mounting member 91 is provided with a screw hole 91b.

[0033] 6(a), when the spike 4 is positioned at the use position, the screw hole 92a and the screw hole 8a face each other in the width direction D1, and the spike 4 is locked at the use position by screwing the bolt 106 into the screw holes 92a and 8a. That is, in this modified embodiment, the bolt 106 and the screw holes 92a and 8a provided in the second mounting member 92 and the attachment member 8 constitute a first locking means.

[0034] 6(b), when the spike 4 is positioned in the unused position, the screw hole 92b and the screw hole 91b face each other in the width direction D1, and the spike 4 is locked in the unused position by screwing the bolt 107 into the screw holes 92b, 91b. That is, in this modified embodiment, the bolt 107 and the screw holes 92b, 91b provided in the second mounting member 92 and the first mounting member 91 constitute a second locking means.

[0035] With this configuration, the spike 4 can be releasably locked between the use position and the non-use position, and the same effect as described above can be obtained. It is preferable to use knob bolts as the bolts 106 and 107, for example.

[0036] Next, a second modified embodiment of the present invention will be described with reference to Fig. 7. The spiked ladder 201 shown in Fig. 7 is similar to the spiked ladder according to the first modified embodiment, but the mounting member 8 is omitted from the ladder fixing device 203 of the spiked ladder 201, and the first mounting member 91 is directly attached to the support 21 of the ladder 2. In this modified embodiment, the second mounting member 92 and the support 21 are provided with insertion holes (not shown), and nuts (plate nuts) 106a are attached to the inner surface of the support 21. The bolts 106 are inserted into these insertion holes (not shown) and screwed into the nuts 106a to lock the spikes 4 in the use position.

[0037] The ladder fixing device 203 also includes a snap lock 207 as a second locking means, and when the spike 4 is positioned in the unused position, the hook 207a of the snap lock 207 hooks onto the hooked portion 207b, thereby locking the spike 4 in the unused position. The hook 207a is attached to the post 21, for example, and the hooked portion 207b is attached to the second mounting member 92, for example.

[0038] Even with this configuration, the spike 4 can be releasably locked into the use position and the non-use position using the bolt 106 and the snap lock 207, so that the same effect as described above can be obtained.

[0039] Although the embodiments and modified forms of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to such embodiments and modified forms, and various modifications and alterations are possible without departing from the scope of the present invention.

[0040] For example, the connecting means 9 in the above embodiment and modified form comprises a first mounting member 91, a second mounting member 92, and a hinge 93, but the connecting means 9 is not limited to this and may have any configuration as long as it enables the spike 4 to be displaced between an in-use position and a non-use position relative to the ladder 2.

[0041] In the second modified embodiment, the abutment portion B1 is provided on the outer surface of the first mounting member 91, but instead, the abutment portion B1 may be attached to the side surface of the support 21. In this case, it is preferable to make the vertical length of the first mounting member 91 shorter than that shown in FIG.

[0042] Furthermore, the ladder fixing device 3 (103, 203) may be upside down from that shown in Fig. 1 etc. In this case, when the second connecting member 92 is positioned in the closed position, the spike 4 is positioned in the use position, and when the second connecting member 92 is positioned in the open position, the spike 4 is positioned in the non-use position. [Explanation of symbols]

[0043] 1,101,201 Spiked ladder 2 ladder 3,103,203 Ladder fixings 4. Spike 5. Mounting means 6 First locking means (first toggle clamp) 7 Second locking means (second toggle clamp) 8 Mounting material 9 Connection means 21 Post C Rotation axis

Claims

1. A ladder fixing device attached to a ladder post, comprising: Spikes and mounting means for pivotally mounting said spike to said post between an in-use position and an out-of-use position about a pivot axis; a first locking means for releasably locking the spike in the use position; When the spikes are in the use position, the tips of the spikes face in a first direction; A ladder fastener wherein when the spikes are in the non-use position, the tips of the spikes face in a second direction opposite the first direction.

2. The mounting means includes a mounting member attached to the support and a connecting means for connecting the mounting member to the spike, 2. A ladder fixing as claimed in claim 1, wherein said first locking means is a toggle clamp attached to said mounting member.

3. the mounting means comprises a mounting member mounted on the support pole, a first mounting member mounted on the mounting member, a second mounting member connected to the first mounting member, and a contact portion protruding from the first mounting member in a third direction perpendicular to the first direction, the second mounting member is pivotable about the pivot axis relative to the first mounting member between an open position and a closed position; The spike is attached to the second mounting member and pivots about the pivot axis together with the second mounting member; 2. A ladder fastener according to claim 1, wherein when said second mounting member is positioned in said closed position, said spike is positioned in said non-use position and said second mounting member abuts said abutment portion.

4. 2. A ladder fastener as claimed in claim 1, further comprising second locking means for releasably locking said spike in said non-use position.

5. A ladder having supports; a ladder fixture attached to the post; The ladder fixture is a ladder fixture according to any one of claims 1 to 4, A spiked ladder, wherein when the spikes are in the use position, the spikes extend in the first direction beyond the ends of the posts.

6. A ladder having supports; Spikes and mounting means for mounting the spike to the support so as to be rotatable about a pivot axis perpendicular to the longitudinal direction of the support between an in-use position and an in-use position; locking means for releasably locking the spike in the use position; When the spike is in the use position, a tip of the spike faces a first direction and the spike extends in the first direction beyond an end of the support; A spiked ladder, wherein when the spikes are in the non-use position, the tips of the spikes face a second direction opposite to the first direction, and the spikes are positioned further in the second direction than the ends of the posts.

7. the mounting means comprises a first mounting member attached to the support pole and a second mounting member pivotably connected to the first mounting member about the pivot axis; 7. A spike ladder as claimed in claim 6, wherein said spike is attached to said second mounting member and is rotatable together with said second mounting member about said pivot axis.

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