JPH0475340B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a support that is attached to a stepladder or ladder (ladder, etc.) to erect a scaffold board.

(Prior Art) Stepladders and ladders are used as simple means when performing work at high places such as painting work and plastering work. However, although this method is effective for local work, when work is to be carried out over a wide area, the ladder etc. must be moved many times.
Because of this inconvenience, when a wide range of work was required, it was sometimes necessary to prepare two ladders and tie logs between them.

However, using logs as footholds is slippery and dangerous. In addition, it is not easy to securely tie the ladder to the ladder, and if the ladder is not completely tied, the work becomes extremely dangerous, so it takes a long time to tie the ladder. Therefore, a scaffolding metal fitting for attaching a scaffolding board to a ladder or the like was developed and disclosed in Japanese Utility Model Application Publication No. 57-58643.

This scaffolding metal fitting has a scaffold board mounting rod with an engaging part on one end that engages with the rung of the ladder, and a hanging rod on the other end of which a hook bolt to be hooked to the rung of the ladder is inserted and locked with a nut. The other end is pivoted by a shaft.

When using this scaffolding metal fitting, at least two or more ladders should be installed in advance in the specified positions, and the engaging part of the scaffold board mounting rod should be engaged with the rung of the ladder, and the engagement part of the scaffold board mounting rod should be engaged with the rung of the ladder, and the Hook the suspension rod's hook bolt. Then, by adjusting the position of the nut, the length from the hook portion of the hook bolt to the pivot point of the mounting rod is adjusted, and after the mounting rod is made horizontal, the scaffold board is placed.

(Problem to be Solved by the Invention) When adjusting the above-mentioned nut position, it is necessary to lift the scaffolding board mounting rod upward and loosen the suspension rod and hook bolt relative to each other so that the nut can rotate freely. . To do this, it is necessary to remove the hook part from the crosspiece, hold the hook bolt, hanging rod, and scaffolding board mounting rod with both hands and make adjustments while supporting the entire weight. Performing this work at heights was dangerous.

Therefore, an object of the present invention is to provide a support for a scaffold board that can safely and easily place the scaffold board horizontally.

(Means for Solving the Problems) Therefore, in order to achieve the above object, the present invention has two hooks, a top and a lower hook, each of which can be hooked onto a rung of a ladder, etc., and a second hook attached downward from the top foot. a support arm that extends horizontally from the lower hook and supports the scaffolding board; a second adjustment bar that has one end pivoted to the end of the support arm on the extension side; and the first adjustment bar. two or more engaging parts provided along the longitudinal direction of one of the bar or the second adjustment bar; and two or more engaging parts provided along the longitudinal direction of the other of the first adjustment bar or the second adjustment bar. A support for a scaffolding board has been created that has one or more engaged parts that are engaged by an engaging part.

(Function) According to the scaffold board support having the above structure, when installing the scaffold board, the top foot and the lower foot are first hooked onto the rungs of a ladder or the like installed at a predetermined position. As a result, the weight of the first adjustment bar, the support arm, and the second adjustment bar that constitute the support is supported by the upper foot and the lower foot, so that the operator does not need to support the weight of the support. Next, the engaged part is hooked onto the engaging part at an appropriate position so that the support arm is horizontal. All of this series of operations can be easily performed with one hand, and therefore the support arm can be easily adjusted horizontally even at high places. After the supports are attached to at least two or more ladders in this way, a scaffold board is placed between each support arm. In this way, it becomes possible to safely and easily install scaffolding boards even at high places.

(Example) Hereinafter, an example embodying the present invention will be described in detail with reference to the drawings.

In the drawings, reference numeral 1 denotes the entire metal support, which is provided with a pair of upper and lower hooks 2 and 3 that can be hooked onto rungs a1 and a2 of a ladder or the like, respectively. Then, the base piece 2a of the attachment 2 located on the upper side
A first adjustment bar 4 is fixed downwardly by welding. The first adjustment bar 4 is made up of two plates 4a and 4b facing each other at a predetermined interval, and both plates 4a and 4b have a plurality of bolt holes 5 to 5 facing each other along the longitudinal direction. , that is, they are formed coaxially. Also, this bolt hole 5
A tightening bolt 7a and a nut 7b for tightening and fixing a second adjustment bar 6, which will be described later, are attached in a removable manner.

In addition, this Atsupa. In this example, the upper hook 2 of both the lower hooks 2 and 3 is formed to be smaller. Further, in this example, in addition to the tightening bolt 7a for the first adjustment bar 4, a stopper bolt 7c for holding down the second adjustment bar 6 is provided.

A support arm 7 for supporting the scaffolding board B is horizontally welded to the base piece 3a of the lower hook 3. In addition, on the upper edge of the support arm 7,
A serrated anti-slip 8 is formed over a predetermined range. Further, the tip of the support arm 7 is bent upward at a right angle, and one end of the second adjustment bar 6 is attached to the tip by a pin 9 so as to be rotatable about the pin. This second adjustment bar 6
A plurality of adjustment grooves 10 to 10 are provided along the lower edge of the
10 are cut in with each opening diagonally downward. The other end of the second adjustment bar 6 is provided with a required adjustment groove 1 in the shaft portion of one tightening bolt 7a.
0 is inserted between both plates 4a and 4b of the first adjustment bar 4 in the engaged state.

The support 1 of this example is formed as described above, and the construction work of the scaffold board B is performed as follows. First, at least two or more ladders L are placed at appropriate intervals on the wall surface to be worked on. Next, the upper hook 2 is hooked onto the upper rung side a1 of the ladder L at a predetermined height, and the lower hook 3 is hooked onto the lower rung side a2. At this time, the lower tightening bolt 7a is inserted into the bolt hole 5 at an appropriate position of the first adjustment bar 4 in advance according to the interval between the crossbars a1 and a2, and temporarily fastened with a nut 7b. Next, by selecting the engagement position of the adjustment groove 10 of the second adjustment bar 6 with respect to the tightening bolt 7a, the support arm 7 is made horizontal. Thereafter, by tightening the first adjustment bar 4 with the tightening bolt 7a and nut 7b, the second adjustment bar 6 is held under pressure, and the support arm 7 is fixed in a horizontal state.

All of this series of operations can be easily performed with one hand, and therefore the support 1 can be mounted safely and reliably even at high places.

Furthermore, by inserting and fixing the stopper bolt 7c into the bolt hole 5 directly above the second adjustment bar 6,
The second adjustment bar 6 is more firmly held under pressure by both the plates 4a and 4b, and the second adjustment bar 6 is prevented from shifting upward and the adjustment groove 10 from coming off the tightening bolt 7a.

This procedure is repeated for other ladders L, etc., and the support 1 is attached in the same manner. Therefore, the scaffold board B is placed between the support arms 7 of each support 1.
, the scaffolding board B will be secured by the anti-slip 8.
Because it is constructed in such a way that lateral displacement is prevented,
You can safely perform high-altitude work such as painting work.

Furthermore, as a ripple effect of this embodiment, since the adjustment grooves 10 are provided diagonally downward, by simply pushing up the support arm 7, the second adjustment bar 6 can be tightened one after another by the lower adjustment grooves 10. It moves diagonally upward while engaging with the bolt 7a. Therefore, the support arm 7 can be adjusted horizontally even with the scaffold board B placed thereon, expanding the range of applications. This will not only make it possible to erect scaffolding boards in a shorter time, but also help improve the safety of working at heights.

Moreover, since the above-mentioned support has a simple structure, it can be lightweight and can be carried safely even at high places.

Although the illustration shows that the support arm 7 is installed on the outside of the ladder L, it is of course possible to install it on the inside (see FIG. 3).

(Effects of the Invention) In the present invention, a support for a scaffolding board is created which has a structure in which two hooks that can be hung on a ladder, etc., an engaging part that can be engaged at any position, and an engaged part are connected to a support arm. , Scaffolding boards can be safely and easily installed horizontally even at high places. Therefore, work at height can be performed safely and efficiently.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a support device according to an embodiment of the present invention in a usage state, FIG. 2 is a side view of the support device, and FIG. 3 is a perspective view showing another usage state. DESCRIPTION OF SYMBOLS 1...Support, 2...Upper foot, 3...Lower foot, 4, 6...First and second adjustment bars, 7
...Support arm, 5...Bolt hole, 10...
adjustment groove.

Claims (1)

[Scope of Claims] 1. Both upper and lower hooks, each of which can be hooked onto a rung of a ladder, etc., a first adjustment bar attached downward from the upper hook, and a scaffolding board horizontally extended from the lower hook. a second adjustment bar, one end of which is pivotally connected to the extending end of the support arm; two or more engaging parts provided; and one or more engaged parts provided along the longitudinal direction of the other of the first adjustment bar or the second adjustment bar and engaged by the engaging part. , A support for a scaffolding board having the following. 2. One of the engaging portion and the engaged portion is a groove, and the other is a pin that engages with the groove, and the groove is provided with the pin as it goes deeper from the opening. The scaffold board support according to claim 1, which is provided obliquely in a direction approaching the adjustment bar.