JP2003166389A - Auxiliary leg for trestle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a auxiliary leg for a trestle, which can be attached to the trestle to sufficiently exert the function of the trestle. <P>SOLUTION: According to the auxiliary leg for the trestle, a receiving frame 2 is obtained by fixing two receiving rods 3 each formed of a cylinder body to both edges of a tread rod 5 formed of a cylinder body in a manner being narrower at an upper location thereof, and receiving bodies 10a, 10b each formed of a cylinder body are arranged at a central lower edge of the tread rod 5 of the receiving frame 2 and a lower edge of the receiving rod 3. Then, impact absorbing stands 9 each formed of an elastic body is attached to both edges of an arcuate bearing body 8 having calibrations on its side surface, which is then movably inserted into the receiving bodies 10a, 10b, to thereby fasten or loosen the bearing body 8 by means of a wing bolt 11. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stepladder auxiliary leg capable of easily moving a stepladder for working at a high place and supporting it for safe use even on an inclined surface.

[0002]

2. Description of the Related Art For the work and maintenance of high places such as a ceiling or a plant, it is possible to fold the foot of a stepladder that spreads under the step of a narrow plate or a pipe, etc. I am using. However, when actually used, the installation place is relatively flat, and in many cases the place is uneven. Therefore, we considered various things each time and used it with patience. And there is also one that adjusts the length of the leg by providing an adjuster at the tip of the foot so as to cope with the unstable condition of the work place.

[0003]

When used in this way, it is used with a color and ingenuity, but if it is used with patience for some unstable conditions, it may be a stepladder at any time during work. When the adjuster comes with an adjuster, it takes time to adjust the adjuster and it becomes troublesome, so it often ends up not being able to fully perform the function of the adjuster, and it requires a stepladder of different height for safety. It was troublesome to store and carry, and I felt very inconvenient to use the stepladder.

[0004]

SUMMARY OF THE INVENTION The present invention solves such inconveniences by providing two receiving columns of a cylindrical body fixed to the both ends of the cylindrical body so that the upper portions thereof are narrowed so that the upper part is narrowed. Cylindrical receiving bodies are provided at the lower end and the lower end of the supporting column, and buffer supports made of elastic material are provided at both ends of the semicircular supporting body, and the supporting body having scales on the side surfaces is movably inserted into the receiving body. It is installed and the support can be tightened and loosened with wing bolts. Further, a hooking plate bent in a U shape is provided near the upper end of the support pillar so that the upper side has an acute angle, and the hooking plate is inserted at both ends of the foot so that the upper part of the support pillar is narrowed. The latch plate is hooked to connect the support pillars.

[0005]

In operation, first, the lower end of the frame of the stepladder to be used is inserted into the support pillar, and auxiliary legs are provided at two positions on the left and right of the stepladder. In the case of flat ground, align the scale with the receiving body so that the position of the buffer cradle is horizontal, fix the support with wing bolts, open the stepladder, and fix the stepladder with the fixing tool. To use. Next, in the case of an inclination orthogonal to the opening / closing side of the frame body, loosen each wing bolt and move the support body to fix it with a wing bolt according to the inclination. In this way, the support can be adjusted in two places, so that the four supporting cushioning pedestals that are supported can be stabilized at any unevenness or slope and work can be performed safely. Moreover, the movement of the support is easily adjusted by the scale on the side surface of the support. If the stepladder to be used is inconvenient and the other stepladders are good, the auxiliary legs are respectively removed from the stepladder, and another stepladder is inserted into the auxiliary leg and used in the same manner as described above. When inserting the auxiliary leg into the stepladder, even if there is a dimensional error in the stepladder, it can be easily adjusted by moving the retaining plate, and the stepladder and the auxiliary stepladder wobble due to the weight of the person in use. The deformation of the is adjusted by the movement of the latch plate so that the work can be done safely.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the drawing, reference numeral 1 denotes the entire auxiliary leg, 2 is a receiving frame, and a cylindrical supporting column 3 has a round shape or a polygonal shape, and a hooking plate 4 bent in a U shape is provided near the upper end. It projects so that the side becomes an acute angle. Numeral 5 is a foot of a rectangular cylinder, and fasteners 6 are vertically provided at both ends thereof, and two support posts 3 are inserted at both ends of the foot support 5 so that the upper part of the support pillar 3 becomes narrow. Then, the support posts 3 are connected by being hooked on the fasteners 6. Reference numeral 7 denotes an adjuster, which is provided with buffer pedestals 9 made of an elastic material at both ends of a semicircular support 8 having scales 8a on its side surface, and supports 10a and 10b at three positions on the support 8. The center support 10a is fixed to the footrest 5, and the support 10b on both sides are fixed to the lower part of the support column 3 to enable movement of the support 8.
Reference numeral 11 is a butterfly bolt, which is screwed onto the receiving body 10a and enables the support body 8 to be tightened and loosened. Reference numeral 12 is a stepladder, and two pairs of frame bodies 15 provided with a footrest 14 on a frame 13 so that the upper part becomes narrower are connected at the upper part by a connecting member 16 and fixed by a fixing member 17 when opened and used. It is the one.

In use, first, the lower end of the frame 13 of the stepladder 12 to be used is inserted into the support post 3 to provide the auxiliary legs 1 at two positions on the right and left sides of the stepladder 12. In the case of flat ground, loosen each wing bolt 11, align the scale 8a with the receiving body 10a so that the position of the buffer cradle 9 is horizontal, and fix the supporting body 8 with the wing bolt 11. Open the stepladder 12,
The stepladder 12 is fixed by the fixing tool 17 and used. Next, in the case of a slope, loosen each wing bolt 11, first move one support 8 so as to fit the slope as shown by the chain double-dashed line in FIG. The support 8 is fixed so as not to move. Further, the other support 8 can be adjusted in the same manner to be used by providing the stepladder 12 on the slope so as to be stable, and can also be used as a "ladder" in a place where the scaffolding is poor. When the auxiliary leg 1 is inserted into the stepladder 12, even if the stepladder 12 has a dimensional error, it can be easily adjusted by moving the latching plate 4, and the stepladder 12 and the auxiliary stepladder can be adjusted depending on the weight of the person in use. 1
The wobbling and some deformation are adjusted by the movement of the retaining plate 4 so that the work can be performed safely. When the stepladder 12 to be used is inconvenient and another stepladder is good, the auxiliary leg 1 is pulled out from the stepladder 12, another stepladder is inserted into the auxiliary leg 1, and the same is used as described above.

[0008]

As described above, according to the first aspect of the present invention, the support can be inserted into the stepladder, and the support can be moved to be used according to the inclination orthogonal to the opening / closing side of the frame. Since the adjustment is done in two places, the four supporting buffer pedestals that support it can be stabilized in any uneven or sloped place, and it is possible to work safely, and by inserting and removing it Since it can also be used by inserting it into other round or polygonal stepladders, its range of use is widened.
According to the present invention, when the auxiliary leg is inserted into the stepladder, even if there is a dimensional error in the stepladder, it can be easily adjusted by moving the latching plate, and the stepladder can be adjusted depending on the weight of the person in use. According to the third aspect of the present invention, the movement adjustment of the support body is ensured by adjusting the movement of the latch plate to prevent the auxiliary stepladder from wobbling and causing some deformation. As described above, the invention has many features and is an extremely excellent invention for industrial use.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a right side view of the embodiment of the present invention.

FIG. 3 is an enlarged front view of a connecting portion for stepping on a foot according to an embodiment of the present invention.

4 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

1 auxiliary leg 2 receiving frame 3 pillars 4 hanging plate 5 feet 6 fasteners 7 adjustment body 8 support 8a scale 9 buffer cradle 10a receiver 10b receiver 11 Butterfly bolt 12 stepladder

Claims (3)

[Claims] 1. A semicircle is provided on the lower half of the center of the foot and the lower end of the support column of the receiving frame, in which the two support columns of the cylindrical body are provided at both ends of the support body so that the upper portions are narrowed. A buffer cradle made of an elastic body is provided at both ends of the support, and the support is movably inserted into the receiver.
Auxiliary legs for stepladders, characterized in that the support can be tightened and loosened with butterfly bolts. 2. A catch plate bent in a U shape is provided near the upper end of the support post so that the upper side has an acute angle, and the stop plate is inserted at both ends of the foot so that the upper part of the support post becomes narrow. The auxiliary leg for stepladder according to claim 1, wherein the retaining plate is engaged with the fastener to connect the support pillar. 3. An auxiliary leg for stepladder according to claim 1, wherein a scale is provided on a side surface of the support.