JP2502689Y2 - Tripod ladder - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tripod ladder suitable for pruning garden trees for gardening. More specifically, the present invention relates to a tripod ladder that can adjust the ladder interval and can be mounted and transported at any desired location. , For a tripod ladder that is easy to store.

[0002]

2. Description of the Related Art Conventionally, there are various types of tripod ladders, but generally, as shown in FIG. 7, it has two ladder columns and one positioning column, A plurality of footrest rods are fixed to the ladder columns at predetermined intervals, and the positioning columns are used for positioning and height adjustment (Actual No. 61-20798, No. 61-53499, 61-161400
No., Jitsukai Sho 61-17198).

In the case of these tripod ladders, unlike the stepladder, since there is only one positioning column, it is advantageous in that it is lightweight, easy to carry, and versatile in the work site to be attached.

[0004]

However, in the case of the tripod ladder as described above, since each part such as the footrest rod is fixed, there are the following problems. That is, for example, when it is used for pruning a garden tree for gardening, it is difficult to install it separately from obstacles such as the garden tree, and its handling is difficult. It is bulky and difficult to carry and store. And other issues.

The present invention has been made in response to such a problem, and its intended place can be easily attached even in a place where garden trees and the like are complicated and complicated. , To provide a tripod ladder that is lightweight, easy to transport, and has a small storage space.

[0006]

A tripod ladder of the present invention as a means for achieving the above object has two ladder columns and one positioning column, and the upper ends of both columns are provided. A tripod ladder in which parts are connected and whose legs can be freely opened around the upper end, wherein the columns for both ladders have a plurality of footrest rod stoppers at predetermined intervals in the vertical direction, and It is configured such that it can be detachably connected with a foot hanging rod whose ladder interval can be freely adjusted via a rod stopper, and the positioning column and the ladder column can be locked by the escape prevention rod.

Further, the tripod ladder according to the present invention is configured such that, in the above-mentioned invention, the two columns for the ladder can be freely opened around the positioning columns.

[0008]

In the tripod ladder of the present invention, first, the mounting position of the footrest rod is adjusted according to the operator on the two ladder columns, and the legrest rod is attached to the footrest rod stopper, and then at the place of attachment. Adjust the spacing between the ladder columns. Here, the length of the footrest rod is also adjusted by sliding. And
After opening the positioning column and adjusting its position and height to make it suitable for work, it is connected / fixed to the ladder column with a escape prevention rod.

Further, when the two ladder columns are capable of opening legs around the positioning columns, the two column columns can be opened by operating the positioning columns. , Its handling becomes easy.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Here, FIG. 1 to FIG.
1 shows a perspective view of the present invention, FIG. 2 is a perspective view of a main portion with a tripod ladder closed, FIG. 3 is a perspective view of a main portion with a tripod ladder open, and FIG. 4 is a ladder. FIG. 5 is a front view and a cross-sectional view of a main part of the footrest rod stopper in the support column, FIG. 5 is a perspective view and a side view of the legrest rod, and FIG. 6 is a perspective view illustrating a usage state.

The tripod ladder of this embodiment is roughly described by connecting one positioning column 1, two ladder columns 2 and 3 and the tips of the columns 1, 2 and 3 so that they can be freely opened. Connecting part 4
, A footrest rod 5, a footrest rod stopper 6, and an escape prevention rod 7.

One positioning column 1 is formed of a column pipe, and a connecting portion 4 for connecting the two ladder columns 2 and 3 so as to be able to open the leg is provided at the tip of the column.
Further, under the support column 1, a escape prevention rod stopper 7a for mounting the escape prevention rod 7 is provided. The ladder columns 2 and 3 are formed of column pipes similarly to the positioning column 1, and a plurality of footrest stoppers 6 are provided in the length direction thereof.
Are engaged.

As shown in FIGS. 2 and 3, the connecting portion 4 is composed of a connecting ring 8, three short cylinders 9 and 9, and a connecting tool 10. The positioning support 1 and two ladders are used for the connecting portion 4. The stanchions 2 and 3 are connected so that they can be opened freely. The connecting ring 8 is
The short cylinders 9 and 9 and the positioning support pillar 1 are swingably connected, and the short cylinders 9 and 9 are mounted by covering the tips of the ladder support pillars 2 and 3. The connecting tool 10 has one operating rod 11 and two hooking claws 11a, and has an operating ring 12 at the lower end of the operating rod 11, and the operating rod 11 is vertically movable on the positioning column 1. It is installed. Here, the operation rod 11 may be arranged independently at the centers of the positioning support column 1 and the two ladder support columns 2 and 3. Then, by moving the operating rod 11 up and down via the operating ring 12, the hooking claw 1
When the 1a is engaged / disengaged with the short cylinders 9 and 9 and disengaged,
The positioning column 1 and the ladder columns 2 and 3 are configured to be swingable.

Further, the ladder 2 is attached to the ladder columns 2 and 3.
A footrest rod stopper 6 for mounting and fixing is attached. The left and right rod bodies 14, 14 are fitted into the central connecting tube 15 of the footrest rod 5, and the connecting tube 15 of the left and right rod bodies 14, 14 is connected.
In contrast, the length can be adjusted by sliding and expanding and contracting (see Fig. 5). An antislip plate is usually attached to the upper surface of the footrest rod 5. Further, the footrest rod stopper 6 is a metal fitting and includes a tubular portion 6a to be inserted / mounted on the columns 2 and 3, a tightening tool 13, and a footrest rod holder 14. Here, the tubular portion 6a
Has a length of about 20 to 25 cm, and the cylindrical portion 6a has a double pipe structure with the columns 2 and 3 to reinforce the strength of the column itself. Also, the tubular portion 6
The inner surface of a has a non-slip structure. Then, the footrest rod stopper 6 can be arbitrarily set in its mounting position with respect to the columns 2 and 3 by adjusting the fastener 13. Also, the escape prevention rod stopper 7a is
The structure is similar to that of the foothold bar stopper 6. The columns 1, 2, 3 and other parts are usually formed of steel, aluminum, synthetic resin, etc., such as cylinders, cylinders, prisms, and prisms, but cylinders and cylinders are preferred.

In the tripod ladder of this embodiment, first, the positioning rod 1 and the ladder rods 2 and 3 are pushed up via the operating ring 12 of the connecting portion 4 to push up the operating rod 11 so that the tip of the operating rod 11 is pushed. The hooking claw 11a provided on the is removed from the short cylinders 9 and 9 covering the tips of the ladder columns 2 and 3 so as to be in a swingable state. Next, depending on the worker, the footrest rod stoppers 6, 6 attached to the two ladder columns 2, 3
.. The position of the tubular portion 6a of is adjusted to adjust the mounting position of the footrest rod 5, and the fastening tool 13 is fixed at that position, and then the footrest rod 5 is fixed to the footrest rod holder 14 of the footrest rod stopper 6. Attach and fix to.

Next, after arranging the tripod ladder at the work site, the positioning support column 1 and the two ladder support columns 2 and 3 are opened,
A state suitable for work by adjusting the interval, mounting / fixing the escape prevention rod 7 on the escape prevention rod stopper 7a, opening the positioning column, and adjusting its position and height. As a result, by fixing the positions of the positioning pillar 1 and the ladder pillars 2 and 3, the assembly of the tripod ladder is completed and a predetermined work can be performed.

When the work is completed, the escape prevention rod 7
Is released from the escape prevention rod stopper 7a, and the footrest rod 5 is disengaged from the footrest rod stopper 6 so that the positioning strut 1
After the legs and the ladder columns 2 and 3 are rocked and closed around the connecting portion 4, the operating ring 12 is pulled, so that the hooking claw 11a via the operating rod 11 causes the two columns 2 and 3 for the ladder. Hooking and engaging with the short cylinders 9 and 9 covering the tip end of the container makes the storage easy. Therefore, it is easy to carry and handle.

It should be noted that the present invention is not limited to the above-described embodiment, but includes a configuration that can be modified and implemented without changing the gist of the present invention. Incidentally, the positioning support pillar and the ladder support pillar are not limited to the structure in which the tip ends thereof are connected by the connecting ring, but may be connected by a spring and may have a structure such as a jump umbrella or the like. Is.

[0019]

As is apparent from the above description, according to the tripod ladder of the present invention, the ladder column has a plurality of footrest bar stoppers at predetermined intervals in the vertical direction, and the footrest bar stoppers are provided. Via a tool, detachably connected with a footrest rod whose ladder interval can be adjusted, and the positioning column and the ladder column can be locked with a escape prevention rod so that each part can be disassembled. Without being limited, even if the ground is uneven, such as on uneven terrain, it can be easily installed,
It has an effect that workability can be improved.

Therefore, according to the present invention, a tripod ladder which can be easily attached even in a place where garden trees and the like are complicated and complicated, is lightweight, can be easily transported, and can be stored in a small space. It has the effect that it can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view of a tripod ladder according to the present invention.

FIG. 2 is a perspective view of a main part with a tripod ladder closed.

FIG. 3 is a perspective view of a main part with a tripod ladder opened.

4A and 4B are a front view and a cross-sectional view of a main part of a foothold rod stopper in a ladder column.

FIG. 5 is a perspective view and a side view of a footrest bar.

FIG. 6 is a perspective view illustrating a use state.

FIG. 7 is a perspective view of a conventional tripod ladder.

[Explanation of symbols]

1 ... Positioning columns, 2,3 ... Ladder columns, 4 ・
..Connecting parts, 5 ... footresting rods, 6 ... footresting rod stoppers, 6a ... cylindrical portion, 7 ... escape prevention rods, 7a ...
・ Escape prevention rod stopper, 8 ... Connection ring, 9 ...
Short cylinder, 10 ... connecting tool, 11 ... operating rod, 11a
..Hooking claws, 12 ... operation ring, 13 ... tightening tools, 14 ... left and right rods, 15 ... connecting cylinder

Claims (2)

(57) [Scope of utility model registration request] 1. A tripod ladder having two ladder columns and one positioning column, connecting the upper ends of both columns, and allowing the legs to freely open around the upper ends. The both columns of the ladder have a plurality of footrest rod stoppers at predetermined intervals in the vertical direction, and are detachably connected via the footrest rod stoppers with adjustable ladder leg stopper rods. A tripod ladder characterized in that the positioning support pillar and the ladder support pillar can be locked by an escape prevention rod. 2. The tripod ladder according to claim 1, wherein the two ladder columns are capable of opening legs around the positioning columns.