JP2541231Y2 - Stepladder safety rod - Google Patents

Description

[Detailed description of the invention]

[0001]

Industrial Applicability The present invention combines a stepladder body and a safety rod to expand and secure the safety area and work area of stepladder work in high-place work such as replacement of fluorescent lamps, signboards, and electrical wiring. .

[0002]

2. Description of the Related Art In a conventional stepladder, as shown in FIG. 2, the legs contact at four points on the floor without a safety rod, and the angle between the legs and the horizontal plane is 7 degrees.
5 degrees or less, the folding type is equipped with a metal stopper that keeps the angle between the leg and the horizontal surface securely. To work safely, use a stepladder that matches the height. Was prepared, and the second stage from the top was determined to be an appropriate work position, and climbing to the top was prohibited.

[0003]

[Problem to be solved by the invention] The work area for working at heights is not constant depending on the building and the object. It is often thought that work can be done without any trouble if the person climbs up, and without preparing a stepladder suitable for the height, the person climbs on the tabletop, causing a crash at that moment. There was a problem that working was unstable and caused a crash. Therefore, as a simple means, a single or a plurality of safety rods shown in FIG. 1 are used, and as shown in FIG.

[0004]

[Means for Solving the Problems] In general, when working on a scaffold, etc., a safety belt is used to prevent a fall. By simply inserting it into the main body and fixing it in place at the fixed position using the principle of leverage, it has been devised so that it can be safely and easily moved up and down to the top plate, the working position, and work on the top plate. Is simple, consisting of uprights and feet, lightweight, not bulky, and easy to carry.

In the case of a single safety rod or a plurality of safety rods, the safety rod can be sufficiently fixed simply by contacting the stepladder main body with reference to FIGS. 2 (1), (2) and (3). First, insert the safety rod between (1) and (2), stand it upright as shown in Fig. 2, and put the foot on (3) while keeping it firmly in contact with the tread surfaces in Figs. 2 to 4 (1) and (2). On the tread.
In FIGS. 3 and 4, when the safety rod is used alone, the safety rod and the stepladder are connected by a chain, a string, fitting, or the like, so that the fixing is further completed. Since multiple cases are completely fixed, no chains, strings, or mating are required. Therefore, it is easy to go up and down on the top plate of the stepladder, and when going up and down, the safety rod can be used instead of a handrail, and when it is about to fall, the safety rod can be gripped to prevent the fall.

To release the fixing, the safety rod can be easily removed by pushing up the fixing body on the opposite side of the foot with a lever bar. For those with low frictional resistance, they need only be pushed by hand.

[0007] As described above, the structure is very simple, and the material can be selected from common ones. A-1 in FIG.
In the example of the above, a pipe with a square cross section of iron was used, a kokeshi-shaped hole was drilled in the upright part, fitted to the protruding part of the existing stand-up stopper metal fitting, and the end was wound with a chain and stored. ,
The safety rod can be stowed easily by simply hooking the foot to the bottom of the stepladder.

[0008]

[Function] The safety rod is fixed by placing its fixed body in the fixed position on the stepladder.

In FIG. 4, if the safety rod attempts to rotate rightward with (1) as a fulcrum, the position of (2) hinders rotation, and attempts to rotate leftward with (2) as a fulcrum. If so, the foot of (3) is obstructed to prevent rotation. The larger the frictional resistance of the contact portion, the better. Therefore, if the contact portion is square or round, the fitting or multi-face contact is better.

In order to prevent the roll from rolling in FIG. 3, any position between the columns can be easily fixed by using a chain, a string, or a fitting fitting as shown in FIG. 5, but a fitting such as a commercially available umbrella stand is used. In this case, a metal fitting is attached to the stepladder, so that it is limited to a fixed position between the columns. In the case of a plurality of safety rods, there is no rolling due to high frictional resistance, and there is no need for chains, strings, fittings, or the like.

As described above, since the safety rod is firmly fixed, it is not easy to release the fixing. In order to release the fixing rod, release the fitting or remove the chain or string wound around the stepladder. Can be easily removed by lifting the fixed body on the opposite side of the foot with a lever. In A-1 in FIG. 1, one foot is added, and two
Although it has two functions, if the foot is lifted upward in Figs. 3 and 4, the fixed safety rod can be easily removed.

[0012] As described above, the structure is extremely simple, and the material can be selected from common metals, wood, bamboo, synthetic resin, and the like. Since it is not bulky, it can be stowed on a stepladder and can be carried at any time.

[0013]

Embodiment 1 Embodiment 1 will be described with reference to the drawings. 1 to 4
The safety rod has a thickness of about 1500 mm and a thickness of about 0.5 to 1.0 mm by sheet metal working using, for example, an iron metal plate, and has a cross-sectional shape of a square with a side of 40 mm. , Is made up of an upright portion and two feet, but may have only one foot. In the example, the legs are open at right angles to each other, and at each tip off the stepladder tread there is an inverted T-shaped cut-off hole. And in the upright part in the longitudinal direction that is continuous with the foot,
There are kokeshi-shaped holes, each of which is a place to hold a chain. It is also used to connect to a stepladder or to lock a protrusion of a stepladder stopper.

(Fixing) In this method of use, the safety rod (FIG. 1) is inserted into the gap between the top plate (FIG. 2) and the work position, and the upright portion is set almost vertically so as to intersect with the side surface of the tread. The part is fixed on the tread of (3) in such a way that the safety rod and the stepladder tread are alternately combined. Therefore, the combination is free if there are two adjacent upper steps and one lower step. And a chain is stretched for the purpose of further securing. Insert the butterfly-shaped bracket at the tip of the chain into the cuts in FIGS. 1 (a) and 1 (b) and wind the opposite end of the chain around the strut on the stepladder as shown in FIGS.

(Release) The chain that has been wound around is removed, the foot that is not in contact with the tread surface is lifted upward, and the upright portion is released by lightly pressing in the direction of the left-turned arrow shown in FIG.

(Storage) Since the safety rod is provided with a kokeshi-shaped hole in the slit (b) of FIG. 1, the protruding element of the existing opening stopper is fixed to this hole in FIGS. 2 and 4. I do. The safety rod is then secured by chain wrap with the uprights of the safety rods along the columns of the stepladder. The chain is stored by connecting using the inverted T-shaped hole and the kokeshi-shaped hole shown in FIG.

Second Embodiment B-2 in FIG. 2 is a perspective view showing a second embodiment. In the case of two safety rods, a round iron pipe is used for fixing to the stepladder, but the chains, strings, and fittings described in the first embodiment are not required because of multi-face contact. When climbing to the top using the upper three steps, the bar on the top of the safety rod is located on the abdomen of the body, and you can use both hands freely. At A-2 in FIG. 1, a horizontal bar is attached and used as a scaffold or as a backrest when climbing to a position higher than the top plate. However, as shown in FIG. It can also be made into a detachable assembling type by sliding, and by removing the horizontal bar, it will be disassembled and become a single safety rod like A-1 in FIG.
The assembling type is the same as in Example 3 [when climbing to a position higher than the top plate]
In addition, the safety rods on both sides of the stepladder are obstructed, so it is necessary to release one side and make it easier to climb from one side. Then, the safety rod B-2 in FIG. 2 is put on the tread inside the stepladder, the stepladder is closed as it is, and it is stored in a sandwich shape so as to be convenient for carrying.

Third Embodiment FIG. 7 is a perspective view showing a third embodiment. A stepladder without a top plate uses the lower three steps, so insert A-2 in FIG. 1 of the safety rod of the second embodiment into the stepladder, and align the apexes of the horizontal bar and the stepladder. You can work in the same way as. In addition, when climbing to a position higher than the top plate, insert another safety rod A-2 in Fig. 1 on the opposite side of the stepladder where the safety rod was inserted, and align the heights of the horizontal bars. If you set them so that they face left and right, you can use the horizontal bar to move up to a position above the tabletop, which has the same effect as raising the stepladder. Work height 2.7
A 5 meter high fluorescent lamp is being replaced with a meter stepladder.

Embodiment 4 A joint fitting is attached to an upright portion or a horizontal bar of a safety rod, and a long rod is used in combination with the joint to provide a ceiling, a wall, or a tree retainer, thereby preventing a stepladder from overturning.

Example 5 The shape of the safety rod is square and linear in Example 1 and rectangular in shape with a horizontal bar attached in Example 2 when viewed from the front, but with or without the horizontal bar. It is also possible to integrally form a triangle, inverted triangle, U-shape, Y-shape, O-shape and the like, and the foot can also be of various shapes, such as single or multiple endless.

Effect In the conventional stepladder operation, the working position shown in FIGS.
At the limit of the work area, climbing to the tabletop was forbidden and safe work was not possible unless a stepladder suitable for the height was prepared. For example, many building companies have always been at risk of crashing, such as replacing fluorescent lights in high places, cleaning windows, and cleaning roof gutters. In order to prevent this, a safety rod that is easy to handle and can be stored and carried compactly is made as a stepladder assisting tool. By making it easier and preventing crashes, the work can be done with peace of mind.

Effects of the Invention Since the present invention is configured as described above, the following effects can be obtained.

Anyone can easily go up and down on the stepladder.

The work on the top plate, the work at the work position, and the work of delivering articles can be performed easily.

The safety of working at heights using a stepladder is increased (a safety belt can be used instead).

A fall can be prevented.

Since the work can be performed with a spread of three units by one stepladder, it is not necessary to prepare extra stepladders.

Since it is not bulky, it is convenient to carry it alone or stored in a stepladder, and the working area in time space is expanded.

Mounting, dismounting, and storage are simple and can be securely mounted.

Because of the simple structure, common materials can be selected and the cost is low.

The prohibition of footing on the top plate can be released.

The invention can be applied to any type of stepladder.

The new stepladder can be processed and integrated as an indispensable thing, and a paired stepladder with a safety rod can be commercialized.

The conventional two-person operation can be performed by one person.

Since one safety rod can be assembled into two safety rods, it can be used properly according to the purpose of use.

The three most commonly used stepladders can be effectively used.

A plurality of safety rods having horizontal bars can be combined in pairs to form a scaffold above the top plate.

If a commercially available joint fitting is added to the safety rod, the falling of the stepladder can be suppressed using the rod.

Since the stepladder can be moved while the safety rod is set, continuous work can be performed on the adjacent land.

The protruding safety rod tip can be used for loading.

[Brief description of the drawings]

FIG. 1 is a three-dimensional view (A-1.A-2) of only a safety rod.

FIG. 2 is a three-dimensional view in which a safety ladder is fixed to a stepladder (B-1 ・ B-).
2).

FIG. 3 is a front view in which one safety rod is fixed to a stepladder.

FIG. 4 is a side view in which one safety rod is fixed to a stepladder.

FIG. 5 is a reference view of a fitting.

FIG. 6 is a reference view of disassembly and assembly when a safety rod such as A-2 in FIG. 1 of Embodiment 2 is detachable.

FIG. 7 is a reference diagram showing a third embodiment.

[Explanation of symbols]

 A Safety rod Upright part, Foot side bar, B Chain locking part C Chain B Stepladder 1 Top plate 2 Working position 3 Tread surface 4 Opening stopper 5 Protrusion of opening stopper 6 Prop

FIG. 8 is a view of a situation in which the user is forced to go up to the top plate and replace the fluorescent lamps by using a stepladder without using a safety rod, but the feet are swung in an unnatural posture. It is.

[Fig. 9] In the method of B-2 in Fig. 2 using a safety rod, the fluorescent lamp is replaced on the top plate, but since the body is stable and both hands can be used freely, it is satisfactory. It is a diagram of safety work.

Claims (1)

(57) [Scope of request for utility model registration] An upright portion and a bent leg are bent at an angle of not less than 90 degrees and less than 180 degrees with a plurality of long rod-shaped members, and the bent leg is formed on the stepladder. A safety rod for a stepladder, which is inserted between upper and lower sides of the tread and is further configured so that a bent foot is locked to the outside of the lower tread and combined with a stepladder.