Ladder fixture

Abstract

Provided is a ladder fixture that has good attachment workability and securely fixes a ladder. 【Solution means】The ladder fixture 10 includes a main body portion 11, a clamp mechanism 20, and a ladder fixing mechanism 30. The clamp mechanism 20 has a first clamping portion 21 provided on the main body portion 11, a clamp arm 22 that shifts between a clamping position where the arm tip portion 22a abuts against the first clamping portion 21 and an open position where the arm tip portion 22a is separated from the first clamping portion 21, and an operation lever 23 that rotates the clamp arm 22. The rain gutter is fixed by sandwiching it between the first clamping portion 21 and the arm tip portion 22a of the clamp arm 22. The ladder fixing mechanism 30 has a second clamping portion 31 provided on the main body portion 11 and a hook arm 32 provided on the main body portion 11 and movable in a direction to change the width interval from the second clamping portion 31. The ladder post is fixed by sandwiching it between the second clamping portion 31 and the hook arm 32.

Description

Technical Field

[0001] The present invention relates to a ladder fixing device for fixing a ladder leaned against a structure such as a roof of a house.

Background Art

[0002] As a conventional ladder fixing device, the one disclosed in Patent Document 1 has been proposed. The ladder fixing device disclosed in Patent Document 1 includes a chain and two fastening fittings fixed to both ends of the chain, and each fastening fitting has two fastening plates and an adjustment screw for changing the gap between the two fastening plates. This ladder fixing device of Patent Document 1 wraps a chain around each support column of a ladder leaned against the roof of a house, and fixes each fastening fitting to the tip of the roof (the eaves) by screwing.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above conventional example, it is necessary to wrap a chain around each support column of the ladder and fix two fastening fittings to the tip of the roof by screwing respectively. Therefore, there is a problem that the installation work is troublesome, time-consuming, and the installation workability is poor.

[0005] In addition, since the ladder is only fixed by the chain wrapped around the support column of the ladder, there is a problem that the ladder cannot be securely fixed depending on the way the chain is wrapped. Therefore, an object of the present invention is to provide a ladder fixing device with good installation workability and capable of securely fixing a ladder.

Means for Solving the Problems

[0006] The present invention has been made in view of the above problems, and includes a main body portion, a clamp mechanism that is attached to the main body portion and fixed to the structure at an upper position of a ladder leaned against the structure, and a ladder fixing mechanism that is attached to the main body portion and fixed to the upper portion of the ladder. The clamp mechanism includes a first clamping portion provided on the main body portion, a clamp arm that is rotatably provided on the main body portion and shifts between a clamping position where the tip of the arm abuts against the first clamping portion and an open position where the tip of the arm is separated from the first clamping portion, and an operation lever that is rotatably provided on the main body portion and rotates the clamp arm. The first clamping portion and the tip of the clamp arm sandwich and fix an object to be clamped of the structure. The ladder fixing mechanism includes a second clamping portion provided on the main body portion and a hook arm that is provided on the main body portion and is movable in a direction to change the width interval from the second clamping portion. The ladder fixing mechanism is characterized in that the column of the ladder is clamped and fixed between the second clamping portion and the hook arm.

Effect of the Invention

[0007] According to the present invention, the attachment workability is good, and moreover, the ladder can be securely fixed.

Brief Description of the Drawings

[0008] The drawings show specific embodiments of the present invention according to the present disclosure, including not only essential configurations of the invention but also optional and preferred embodiments.

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0010] Hereinafter, each embodiment will be described in detail with reference to the accompanying drawings. In this embodiment, descriptions of technologies already known are omitted. Also, what is illustrated is an apparatus and method for embodying the technical idea of the invention, and the technical idea of this invention is not limited to the following. The technical idea of this invention can be variously modified within the scope of the matters described in the claims for utility model registration. In particular, it should be noted that the drawings are schematic and different from the actual ones.

[0011] FIGS. 1 to 7 show an embodiment of the present invention. First, the ladder 1 will be described. As shown in FIG. 1, the ladder 1 is composed of two support columns 2 arranged at intervals and a plurality of treads 3 connecting between the two support columns 2. Each tread 3 is arranged at equal intervals in the longitudinal direction of the support column 2.

[0012] As shown in FIG. 2, when the ladder 1 is hung on the roof 5 of a house which is a structure, its lower end surface is simply placed on the installation surface 4, and its upper end part is obliquely leaned against the eaves of the roof 5. Just below the eaves, a rain gutter 6 which is an object to be clamped is provided along the direction in which the eaves extend.

[0013] The user can climb onto the roof 5 while hooking their foot on the tread 3 of the ladder 1, and conversely, can descend to the installation surface 4 while hooking their foot on the tread 3 of the ladder 1.

[0014] As shown in FIGS. 3 to 5, the ladder fixture 10 includes a main body portion 11, a clamp mechanism 20 for fixing the rain gutter 6 at an upper position of the ladder 1 leaned against the eaves of the roof 5, and a ladder fixing mechanism 30 for fixing the upper portion of the ladder 1.

[0015] One end side of the main body portion 11 is provided wide when viewed from the side, and the other end side is gradually formed narrower toward the tip. The other end side of the main body portion 11 is configured as an auxiliary handle portion 12. A carabiner 13 is attached to the tip of the other end side. The main components such as the main body portion 11 are formed of glass fiber reinforced nylon which can be expected to have high strength.

[0016] The clamp mechanism 20 includes a first clamping portion 21 provided on the outer surface of the main body portion 11, a clamp arm 22 rotatably provided on the main body portion 11, and an operation lever 23 rotatably provided on the main body portion 11 for operating the clamp arm 22.

[0017] The first clamping portion 21 has a main clamping portion 21a slidably disposed on the main body portion 11 and a sub clamping portion 21b fixed to the main body portion 11. The main clamping portion 21a can change its position by sliding. For example, the clamping position may be changed according to the type, dimensions, etc. of the rain gutter 6, and the clamping position of the main clamping portion 21a can be changed to cope with such cases. Cushion members 24 are provided on the surfaces of the main clamping portion 21a and the sub clamping portion 21b. The cushion members 24 are made of rubber, for example.

[0018] The clamp arm 22 rotates about a first rotation support portion 25 with respect to the main body portion 11 between a clamping position (the position in FIG. 3) where the arm tip portion 22a abuts against the first clamping portion 21 and an open position (the position in FIG. 4) where the arm tip portion 22a is separated from the first clamping portion 21. A cushion member 24 is provided on the surface of the arm tip portion 22a. The cushion members 24 are made of rubber, for example.

[0019] The operation lever 23 is provided rotatably with respect to the main body 11 about the second rotation support portion 26. The tip side of the operation lever 23 from the second rotation support portion 26 is rotatably connected via a link pin (not shown) to the base end side (opposite to the arm tip portion 22a) of the first rotation support portion 25 of the clamp arm 22. Thereby, the clamp arm 22 is rotated by the rotation operation of the operation lever 23.

[0020] That is, the operation lever 23 rotates between a first operation position (the position in FIG. 3) where the clamp arm 22 is in the clamping position and a second operation position (the position in FIG. 4) where the clamp arm 22 is in the open position.

[0021] A spring force of a spring (not shown) that biases the operation lever 23 toward the second operation position acts on the operation lever 23. Thereby, when the user rotates the clamp arm 22 from the open position to the clamping position, it is necessary to rotate the operation lever 23 against the spring force. Conversely, when rotating the clamp arm 22 from the clamping position to the open position, the operation lever 23 is rotated by the spring force.

[0022] The operation lever 23 is provided with a lever lock portion 27 (shown in FIG. 4) that locks the operation lever 23 in the first operation position, a safety lever 28 (shown in FIG. 3) that unlocks the lever lock portion 27, and an unlock button 29.

[0023] The lever lock portion 27 is provided at the base end portion of the operation lever 23. The lever lock portion 27 has a locked position where it enters a recess (not shown) of the main body 11 and an unlocked position where it protrudes out of the recess.

[0024] The safety lever 28 is disposed on the outer peripheral surface above the operation lever 23 and can be operated to an operation position that allows the rotation of the operation lever 23 by a sliding operation. The unlocking button 29 is disposed on the inner peripheral side above the operation lever 23. The unlocking button 29 is of the push-down type and is operated to be pushed into the operation lever 23. The unlocking button 29 is configured to be push-down operable only when the safety lever 28 is operated to the operation position that allows the rotation of the operation lever 23. That is, the lever lock portion 27 is unlocked only when the user operates the safety lever 28 and the unlocking button 29 simultaneously.

[0025] The ladder fixing mechanism 30 includes a second clamping portion 31 provided on the main body portion 11 and a hanging arm 32 provided on the main body portion 11. The second clamping portion 31 is constituted by both side surface portions of the main body portion 11. A high-strength member is disposed on the surface of the side surface portion of the main body portion 11.

[0026] The hanging arm 32 passes through a pair of long holes 14 of the main body portion 11 and a pair of round holes 36a of a height adjusting member 36 described below, and is composed of a horizontal arm portion 32a whose both end sides protrude outward from both side surface portions, and a pair of tip arm portions 32b bent at right angles from both tips of the horizontal arm portion 32a. The hanging arm 32 is provided to be movable on the condition that the arm lock portion 33 is unlocked in the longitudinal direction of the horizontal arm portion 32a, that is, in the direction of changing the width interval from the second clamping portion 31.

[0027] The arm lock portion 33 includes a pair of left and right leaf spring locking pieces 34 each having one end fixed to the height adjusting member 36, and a pair of coil springs 35 that bias the free end sides of the respective leaf spring locking pieces 34 toward the center side of each other. Each hole (not numbered) of the pair of left and right leaf spring locking pieces 34 is penetrated by the horizontal arm portion 32a, and each leaf spring locking piece 34 interferes with the horizontal arm portion 32a in a tilted state by the spring force of each coil spring 35.

[0028] When the leaf spring locking piece 34 located on the side opposite to the side where the user wants to move with a finger or the like is displaced in the vertical direction (outward direction) against the spring force of the coil spring 35, the interference between the leaf spring locking piece 34 and the horizontal arm portion 32a of the hook arm 32 is released. As a result, the lock of the arm lock portion 33 is released, and the hook arm 32 can be moved to the side where the user wants to move it. For example, as shown in FIG. 7, when the user displaces the right leaf spring locking piece 34 in the vertical direction and presses the right tip arm 32b to the left, the hook arm 32 moves in the left direction in FIG. 7. When the user removes a finger or the like from the leaf spring locking piece 34, the leaf spring locking piece 34 returns to its original inclined position by the spring force of the coil spring 35, the arm lock portion 33 becomes locked, and the hook arm 32 is locked. The hook arm 32 can thus change the width interval from the second clamping portion (side surface portion) 31 and can be locked at a desired position.

[0029] Since the arm lock portion 33 has a pair of left and right leaf spring locking pieces 34 and a pair of coil springs 35, it is configured to lock against the movement of the hook arm 32 in both directions and to be unlockable. Therefore, the hook arm 32 can sandwich the support column 2 of the ladder 1 at an outer position on either side of the main body portion 11.

[0030] The height adjustment member 36 is configured such that its height can be changed with respect to the main body portion 11 by rotating the height adjustment screw 37. Thereby, the ladder fixing mechanism 30 is provided so as to be movable also in a direction orthogonal to the direction in which the width interval between the hook arm 32 and the second clamping portion (side surface portion) 31 is changed (the height direction in this embodiment). That is, the height of the hook arm 32 can be adjusted according to the height position of the support column 2 of the ladder 1.

[0031] Next, the mounting operation of the ladder fixture 10 will be described. The ladder fixture 10 will be described assuming that the operation lever 23 is located at the first operation position and the clamp arm 22 is located at the clamping position. The user attaches the ladder fixture 10 to, for example, a belt (not shown) using the carabiner 13 and climbs the ladder 1 up to near the rain gutter 6 of the roof 5. The user first removes the ladder fixture 10 from the belt.

[0032] Next, with the user holding the support column 2 of the ladder 1 loosely between the second clamping part (side surface part) 31 of the ladder fixture 10 and the tip arm part 32b of the hook arm 32, the user presses the unlock button 29 while sliding the safety lever 28 of the operation lever 23. Then, the lever lock part 27 is unlocked, and the operation lever 23 is rotationally operated from the first operation position to the second operation position by the spring force. As a result, the clamp arm 22 rotates from the clamping position to the release position. When rotationally operating the operation lever 23 from the first operation position to the second operation position, it is preferable to perform the operation while also gripping the auxiliary handle part 12 so that a stable operation is possible.

[0033] The user positions the rain gutter 6 in the space between the arm tip part 22a of the clamp arm 22 and the first clamping part 21, and rotates the operation lever 23 from the second operation position to the first operation position against the spring force. Then, the arm tip part 22a of the clamp arm 22 gradually approaches the rain gutter 6, and finally, the arm tip part 22a of the clamp arm 22 abuts against the inner surface of the rain gutter 6, and the rain gutter 6 is clamped without a gap between the arm tip part 22a of the clamp arm 22 and the first clamping part 21 (see FIG. 6). The operation lever 23 returned to the first operation position is locked by the lever lock part 27.

[0034] Next, if there is a gap between the horizontal arm part 32a of the hook arm 32 and the support column 2, the user adjusts the height of the horizontal arm part 32a of the hook arm 32 so that there is almost no gap between the horizontal arm part 32a and the support column 2. Then, the user releases the locking of the leaf spring locking piece 34 located on the side opposite to the side where the user wants to move, adjusts the width of the tip arm part 32b of the hook arm 32, and adjusts it to a position where the support column 2 of the ladder 1 is clamped without a gap between the tip arm part 32b and the second clamping part (side surface part) 31 (see FIG. 7). When the user removes a finger or the like from the leaf spring locking piece 34 after the width adjustment is completed, the leaf spring locking piece 34 returns to its original position by the spring force of the coil spring 35, and the hook arm 32 is locked. Thus, the installation work is completed.

[0035] When it is desired to fix the ladder fixture 10 to both struts 2 of the ladder 1, another ladder fixture 1 is attached to the other strut 2 by the same operation as described above.

[0036] By the above attachment operation, the rain gutter 6 is fixed by being sandwiched between the clamp arm 22 and the first clamping portion 21 of the ladder fixture 10, and the ladder 1 is fixed by being sandwiched between the hook arm 32 and the second clamping portion (side surface portion) 31 of the ladder fixture 10. Since the rain gutter 6 and the ladder 1 are both fixed by being sandwiched by the ladder fixture 10 in this way, even if some external force acts on the ladder 1, the ladder 1 will not be displaced in the left - right direction or rotated in the direction opposite to the leaning direction.

[0037] As described above, the ladder fixture 10 includes a main body portion 11, a clamp mechanism 20 that is attached to the main body portion 11 and fixes to the rain gutter 6 at the upper position of the ladder 1 leaned against the roof 5, and a ladder fixing mechanism 30 that is attached to the main body portion 11 and fixes to the strut 2 of the ladder 1. The clamp mechanism 20 has a first clamping portion 21 provided on the main body portion 11, a clamp arm 22 that is rotatably provided on the main body portion 11 and shifts between a clamping position where the arm tip portion 22a abuts against the first clamping portion 21 and an open position where the arm tip portion 22a is separated from the first clamping portion 21, and an operation lever 23 that is rotatably provided on the main body portion 11 and rotates the clamp arm 22. The rain gutter 6 is fixed by being sandwiched between the first clamping portion 21 and the arm tip portion 22a of the clamp arm 22. The ladder fixing mechanism 30 has a second clamping portion 31 provided on the main body portion 11 and a hook arm 32 that is provided on the main body portion 11 and is movable in a direction to change the width interval from the second clamping portion 31. The strut 2 of the ladder 1 is fixed by being sandwiched between the second clamping portion 31 and the hook arm 32.

[0038] Therefore, for the installation work of the ladder fixture 10, it is only necessary to rotate the operation lever 23 to rotate the clamp arm 22 to sandwich the rain gutter 6, and to operate the position of the hook arm 32 to sandwich the ladder 1. Only simple operations of the operation lever 23 and the hook arm 32 are required. Also, since the ladder fixture 10 is fixed by sandwiching both the ladder 1 and the rain gutter 6, the ladder 1 is firmly fixed to the rain gutter 6 via the ladder fixture 10. From the above, the installation workability is good, and moreover, the ladder 1 can be reliably fixed.

[0039] The ladder fixing mechanism 30 is provided such that the hook arm 32 is also movable in a direction orthogonal to the direction in which the width interval from the second clamping portion (side surface portion) 31 is changed (in this embodiment, the height direction).

[0040] Therefore, since the hook arm 32 can be moved in both the direction in which the width interval is changed and the direction orthogonal thereto (in this embodiment, the height direction), the position of the hook arm 32 can be adjusted according to the position of the rain gutter 6, and the rain gutter 6 can be reliably fixed by the hook arm 32.

[0041] Cushion members 24 are provided at the first clamping portion 21 and the arm tip portion 22a of the clamp arm 22. Therefore, damage to the rain gutter 6 can be prevented.

[0042] The ladder fixing mechanism 30 is such that the hook arm 32 protrudes in both directions of the main body portion 11, and the ladder 1 can be sandwiched on the outer surface on either side of the main body portion 11. Therefore, the ladder fixture 10 can be attached to either of the two columns 2 of the ladder 1. Also, two ladder fixtures 10 can be attached to the two columns 2 of the ladder 1, and the fixing force of the ladder 1 can be improved.

[0043] A lever lock portion 27 for locking the operation lever 23 at the first operation position is provided, and a safety lever 28 and an unlocking button 29 are provided on the operation lever 23. The operation of the unlocking button 29 is permitted only when the safety lever 28 is operated to an operation position that permits the rotation of the operation lever 23.

[0044] Therefore, the rotation of the operation lever 23 becomes possible only when both the safety lever 28 and the unlocking button 29 are operated, and the operation lever 23 does not rotate by operating the unlocking button 29 alone. Thus, the operation lever 23 can be prevented from being inadvertently operated, improving safety.

[0045] In this embodiment, the rain gutter 6 is round (semicircular), but it can also be applicable to common types such as square or reversible types.

[0046] In this embodiment, the structure is the roof 5 and the object to be clamped by the structure is the rain gutter 6. However, the ladder fixture 10 of the present invention can also be applied to other objects. For example, the structure may be a temporary scaffold installed during building exterior decoration, and the object to be clamped by the structure may be a flat plate extending in the horizontal direction.

[0047] In this embodiment, the ladder fixing mechanism 30 is structured to be fixed to the support column 2 of the ladder 1, but it may also be configured to be fixed to the rung 3.

[0048] As described above, each embodiment has been described in detail, but it is not limited to a specific embodiment, and various modifications and changes are possible within the scope described in the utility model registration claims.

[0049] Also, the present invention can include at least the following embodiments. The embodiments can be adopted separately or in combination with each other.

[0050] (1) The ladder fixing mechanism is characterized in that the hook arm is provided so as to be movable in a direction orthogonal to the direction in which the width interval with the second clamping portion is changed. (2) The first clamping portion and the arm tip of the clamp arm are provided with cushion members. (3) The ladder fixing mechanism is characterized in that the hook arm protrudes in both directions of the main body, and the ladder can be sandwiched between the outer surfaces of both sides of the main body portion. (4) A lever lock part for locking the operation lever at the first operation position is provided. The operation lever is provided with a safety lever and an unlocking button. The operation of the unlocking button is permitted only when the safety lever is operated to an operation position that permits the rotation of the operation lever. When the unlocking button is operated to an operation position that permits the rotation of the operation lever, the lever lock part changes from the locked position to the unlocked position.

Explanation of Signs

[0051] 1 Ladder 2 Support column 5 Roof (structure) 6 Gutter (object to be clamped) 10 Ladder fixture 11 Main body part 20 Clamping mechanism 21 First clamping part 22 Clamping arm 22a Arm tip part 23 Operation lever 24 Cushion member 27 Lever lock part 28 Safety lever 29 Unlocking button 30 Ladder fixing mechanism 31 Second clamping part 32 Hooking arm 33 Arm lock part

Claims

1. The ladder includes a main body, a clamp mechanism attached to the main body and fixed to the structure at an upper position of the ladder leaned against the structure, and a ladder fixing mechanism attached to the main body and fixed to the upper portion of the ladder, the clamp mechanism includes a first clamping portion provided on the main body, a clamp arm rotatably provided on the main body and movable between a clamping position where an arm tip abuts against the first clamping portion and an open position where the arm tip is separated from the first clamping portion, and an operating lever rotatably provided on the main body for rotating the clamp arm, and fixes the structure by clamping an object to be clamped between the first clamping portion and the arm tip of the clamp arm, The ladder fixing mechanism has a second clamping portion provided on the main body portion and a hooking arm provided on the main body portion and capable of moving in a direction to change the width distance between the second clamping portion, and is characterized in that the ladder is fixed by clamping it between the second clamping portion and the hooking arm.

2. The ladder fixing device according to claim 1, characterized in that the ladder fixing mechanism is also movable in a direction perpendicular to the direction in which the width distance between the hooking arm and the second clamping portion is changed.

3. 2. The ladder fixing device according to claim 1, wherein a cushion member is provided on the first clamping portion and the arm tip of the clamp arm.

4. The ladder fixing device according to claim 1, characterized in that the ladder fixing mechanism has hooking arms that protrude in both directions of the main body and can clamp the ladder on either outer surface of the main body.

5. a lever lock portion that locks the operating lever at a first operating position; the operating lever is provided with a safety lever and a lock release button, and the operation of the lock release button is permitted only when the safety lever is operated to an operating position that permits rotation of the operating lever, 2. A ladder fixing device as described in claim 1, characterized in that when the unlock button is operated to an operating position that allows rotation of the operating lever, the lever lock portion changes from the locked position to the unlocked position.

Images