JPH08479Y2 - Stepladder - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an improvement of a standing type stepladder.

[0002]

2. Description of the Related Art Conventionally, a footrest for a stepladder has a footrest formed by a pipe or the like, and its end is fastened to the upper part of the supporting leg by welding or the like. However, in this case, this protruding footrest is an obstacle when carrying or storing the stepladder.

In order to improve the above points, a locking plate 30 is welded tangentially to the front side of the supporting leg 4 as shown in FIG. The channel-shaped locking body 31 is capped and the supporting leg 4 is welded so as to be sandwiched between the locking plate 30 and the locking body 31 from the front and back.
Opposing side plates 31 'and 31' are provided so as to be opposed to the upper surface of 31 and the base portion thereof is welded to the locking body 31.
Insert the mounting plates 32 '・ 32' protruding from the base of the footrest 32 into the inside of this, and install the mounting plates 32 '・ 32' in the center of the opposing side plates 31 '・ 31'. Pivotally attach the foot rest 32 to the body
When the footrest body 32 is positioned substantially horizontally, the tip of the footrest body 32 is slidable with respect to the support leg 4, and the tip of the footrest body 32 is slid downward with the main shaft 33 as the axis. Mounting plate 32 ', 32' fixed to the base, base surface 32 ', 32' of the corner joint portion and rear side projecting end surface 34, 34 of opposite side plate 31 ", 31" come into contact with each other to mount foot 32 Is locked in a substantially horizontal state with respect to the stepladder a, but since the contact surface between the base surface 32 "・ 32" and the projecting end surface 34 ・ 34 of the opposite side plate 31 '・ 31' is small, the operator With feet 32
When I put my foot on the floor and worked, there was a problem in safety because it was erratic and unstable.

The present invention solves the above-mentioned drawbacks. The contact surfaces of the mounting plates 6 ', 6'of the footrest body 6 and the locking body 5 are provided with the upper surface of the bottom plate 5'of the locking body 5 and the opposite side plate. To provide a stepladder configured to abut on a wide area at two points with an end surface of 5 "and 5" so that the footrest body 6 is firmly locked to the stepladder a so that work can be performed safely. Is.

[0005]

The gist of the present invention will be described with reference to the accompanying drawings.

In a stepladder a in which two legs 2 and 3 are vertically provided on the left and right sides of the top part 1 and one support leg 4 is provided on the opposite rear side, the upper side of the support leg 4 is opened upward. The bottom leg 5'of the channel-type locking body 5 is fixed to the bottom leg 5'with the supporting leg 4 inserted therethrough, and is projected on the inside of the opposite side plates 5 ", 5" of the locking body 5 at the base of the footrest body 6. The attached mounting plates 6 ', 6'are inserted, and the mounting plates 6', 6'are pivotally attached to the support shaft 7 installed near the front side of the opposite side plates 5 ", 5" of the locking body 5, and the footrest body is mounted. The present invention relates to a stepladder characterized in that 6 is provided so as to be vertically slidable with respect to the locking body 5.

[0007]

Operation: The bottom plate 5'of the channel type locking body 5 is fixed to the bottom plate 5'with the supporting leg 4 inserted therethrough, and the mounting plates 6 ', 6'of the footrest body 6 are attached to the insides of the opposite side plates 5 ", 5". Insert this mounting plate 6 '・ 6'
Is pivotally attached to a support shaft 7 installed in front of the opposite side plates 5 "and 5" of the locking body 5, and the tip of the footrest body 6 is attached to the support leg 4 by the support shaft 7
When the footrest of the footrest body 6 is positioned in a substantially horizontal state by oscillating downwards about the axis, the lower end surfaces of the mounting plates 6 ′ and 6 ′ projecting from the base of the footrest body 6 are engaged with the locking body 5 Of the base plate 8 of the corner joint portion of the mounting plates 6'and 6'of the foot rest 6 and the opposite side plates 5 "and 5" of the locking body 5 protruding rearwardly. Since the end faces 9 are in contact with each other, the footrest 6 is locked in a horizontal state with respect to the stepladder a.

After the work is completed, the footrest body 6 is slid upward to fold the footrest body 6.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings illustrate a preferred embodiment of the present invention.

In a stepladder a in which two legs 2 and 3 are vertically provided on the front left and right of the top part 1 and one support leg 4 is vertically provided on the opposite rear side, the upper side of the support leg 4 is opened upward. A channel-shaped locking body 5 is provided, and welding is performed with the support leg 4 inserted into the bottom plate 5'of the locking body 5, and the opposite side plates 5 "and 5" are erected on the bottom plate 5'to face each other. Installed and weld the base end to the bottom plate 5 ′, and insert the mounting plates 6 ′ and 6 ′ protruding from the base of the footrest body 6 inside the opposite side plates 5 ″ and 5 ″ of the locking body 5. The mounting plates 6'and 6'are pivotally attached to the support shaft 7 which is provided near the front side of the opposite side plates 5 "and 5" of the locking body 5.

When the tip of the footrest body 6 is swung downward around the support shaft 7 and the footrest portion of the footrest body 6 is positioned in a substantially horizontal state, the lower end surfaces of the mounting plates 6 ', 6'are engaged. Abutment on the upper surface of the bottom plate 5'of the stopper 5 and mounting plates 6 ', 6'of the footrest 6
Base surface 8 of the corner joint part of 8 and the opposite side plate 5 "of the locking body 5
The position of the support shaft 7 is selected and set so that the rear end of the 5 "and the projecting end surface 9, 9 come into contact with each other.

Since the construction of the present invention is constructed as described above, when the tip of the footrest body 6 is swung downward about the support shaft 7 so that the footrest portion of the footrest body 6 is positioned in a substantially horizontal state. As described above, the lower end surfaces of the mounting bodies 6'and 6'abut on the upper surface of the bottom plate 5'of the locking body 5, and the mounting plate 6'of the footrest body 6
6 ', the base surface 8 of the corner joint portion and the opposite side plate 5 "of the locking body 5"
Since the rear end of the 5 "is brought into contact with the projecting end surface 9, the foot rest 6 can be firmly locked to the support leg 4.

Further, as shown in FIGS. 1 and 4, the support leg 4 is attached to the outer cylinder.
The inner cylinder 11 is inserted into the expandable / contractible leg 4, and a plurality of locking holes 12 are formed near the upper part of the vertically movable inner cylinder 11, and the bearing part 13 is formed near the lower part of the outer cylinder 10. This bearing part is attached
When the handle rod 15 is gripped on the support shaft 14 installed on the shaft 13, the handle rod 15 is constantly pressed against the bearing portion 13 so that the lock rod 16 comes out of the lock hole 12 of the inner cylinder 11 against the spring 17. There is 17
If the horizontal height of the standing surface where the supporting leg 4 is to be raised is different from the horizontal height of the shoes of the legs 2 and 3 when the step a is to be raised, slide the inner cylinder 11 from the outer cylinder 10. The figure shows a stepladder a configured to be raised and lowered and adjusted to be substantially horizontal with the top portion 1 of the stepladder a so that the stepladder a can be erected in a stable manner.

Reference numeral 18 in the figure is a chain for preventing expansion.

[0015]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, when the footrest is slid downward and the footrest is positioned in a substantially horizontal position, the mounting plate protruding from the base of the footrest is engaged. Since the contact surface with the stopper body is in contact with two portions in the horizontal direction and the vertical direction and in a wide area, the footrest can be firmly locked to the supporting leg.

When the stepladder a is moved or stowed after the work is completed, the tip of the legrest can be slid upward so that it can be stowed out of the way. It becomes an excellent stepladder that is not taken.

[Brief description of drawings]

FIG. 1 is a perspective view of the present embodiment.

FIG. 2 is a perspective view showing a structure of a locking body and a footrest according to the present embodiment.

FIG. 3 is an explanatory view showing a mechanism of a locking body and a footrest body of the present embodiment.

FIG. 4 is a side sectional view showing a structure in which the support leg of the present embodiment is configured as an expandable / contractible support leg in which an inner cylinder is inserted into an outer cylinder.

FIG. 5 is an explanatory view showing the structure of a conventional stepladder for a stepladder.

[Explanation of symbols]

 1 Top part 2, 3 Leg body 4 Support leg 5 Locking body 5'Bottom plate 5 "Opposite side plate 6 Leg rest body 6'Mounting plate 7 Support shaft

Claims (1)

[Scope of utility model registration request] 1. Two legs are hung vertically on the left and right of the front of the top,
In a stepladder in which one supporting leg is hung vertically on the opposite rear side, the supporting leg is fixedly inserted into the bottom plate of the channel-type locking body which opens upward toward the upper part of the supporting leg, and the supporting leg is fixed. Insert the mounting plate protruding from the base of the footrest inside the opposite side plate,
A stepladder characterized in that the mounting plate is pivotally attached to a support shaft erected on the front side of the opposite side plate of the locking body so that the footrest body can be vertically slid with respect to the locking body.