JP3157811B2 - Tripod Step Opener - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tripod on which the upper end of a ladder-like leg which is open in a front C-shape and the upper end of one support leg on the rear side are openably and closably connected. .

[0002]

2. Description of the Related Art Unlike a quadruple stepladder, this type of tripod is a three-point support, so that it can be stably stood even if the supporting surface is not flat and obstacles are complicated. Even when it is complicated, the rear support legs can be set up between those obstacles, so that it is widely used for garden tree pruning and the like.

FIG. 4 shows how to use a conventional tripod. First, the overall configuration of a conventional tripod stepladder will be described with reference to FIG. 1 showing one embodiment of the present invention. Reference numeral 1 denotes a tripod stepladder, which is a front ladder-shaped leg 2 opened in a C-shape and one rear stepped leg. A support leg 3 is provided, and the upper ends thereof are connected by a connecting portion 4 so as to be openable and closable. The ladder-like leg 2 is composed of side frames 2a arranged in a C-shape on both sides, and a step bar 2b erected between the side frames 2a, 2a at appropriate intervals in the height direction. A reinforcing frame 2c is attached along the frames 2a, 2a. An extendable leg 5 is attached to a lower end of the support leg 3 so as to be extendable and adjustable by a locking pin 6.

[0004] The above configuration is the overall configuration of a conventional tripod, and its use is as shown in FIG. That is,
As described above, the ladder-like leg 2 of the tripod step 1 has a complicated structure and is heavy. On the other hand, the support leg 3 is formed of a single rod-like body, so that the structure is simple and lightweight, so that the user M When carrying or storing the tripod stepladder 1, the ladder-shaped leg 2 is on the lower side. Naturally, when the tripod stepladder 1 is to be leaned, as shown in FIG. As shown in FIG. 4 (b), when the tripod step 1 in a closed state from the side of the ladder-like leg 2 is gradually raised, and the tripod step 1 is in a state of standing substantially vertically upright, the user sets the ladder-like step. The tripod is moved while holding the tripod 1 on the opposite side of the body 2, that is, on the side of the support leg 3 on the rear side, and the support leg 3 and the ladder-like leg 2 are manually held on the support leg 3 side. Holding, and in this state, FIG.
As shown in FIG. 4 (d), the user is positioned between the two legs 2 and 3 and gradually opens them, and as shown in FIG. 4 (d), opens the legs to a desired opening angle. At this point, the user moves again to the side of the ladder-like leg 2 as shown in FIG. 4E, and climbs from the step 2b of the leg 2 to perform pruning work and the like.

Further, in order to shift the tripod step 1 from the open state to the closed state, the steps (e) to (d), (c), (b) and (a) are performed in reverse to the above steps. The user must also perform this closing operation by carefully moving between the support leg 3 side and the ladder-like leg 2 side.

[0006] As described above, in the conventional tripod step 1, both legs are opened from the closed state to a predetermined angle, and at least until the pruning operation or the like is performed, the legs are opened as shown in FIGS. The operation must be performed, and the closing operation must be performed in the same manner as in (e) to (a), and as described at the beginning, this type of tripod is different from a quadruped, It is often used in places with severe irregularities such as gardens, so when performing the above troublesome opening and closing leg operation, the balance is lost and the tripod 1 is dropped, or the user falls down and the user himself falls down He was giving too much fatigue.

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, the present invention allows a user to move a tripod from a closed state to an open state as easily as possible, and vice versa. The aim is to propose a tripod that can be operated.

[0008]

In order to achieve the above object, according to the present invention, there is provided a ladder-like leg 2 having a front-side opening in a C-shape and a rear supporting leg. One end of the tripod 1 is connected to the upper end of the body 3 so as to be openable and closable, and one end is pivotally connected to the rear supporting leg 3 to form a pivotal support 7, and the other end is a ladder-like leg. An open / close operation rod 9 having a free end portion 8 having a length extending forward of the ladder-like leg 2 is provided. Can be opened and closed with respect to the ladder-like leg 2.

The invention according to claim 2 is characterized in that the opening and closing operation rod 9
The pivot support 7 has a configuration according to claim 1, wherein the operating rod 9 comprises a universal joint 7A capable of swinging up, down, left and right with the pivot 7 as a fulcrum.

According to a third aspect of the present invention, the opening and closing operation rod 9 is provided.
3. An engaging portion 10 for engaging the operating rod 9 with the ladder-like leg 2 at an appropriate position is provided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, most of the construction of a tripod 1 is the same as described in the section of the prior art. That is, a ladder-like leg 2 opened in a front C-shape and one support leg 3 on the rear side are provided.
The ladder-like leg 2 is erected between the side frames 2a, 2a arranged at an appropriate interval in the height direction and the side frames 2a arranged in a C-shape on both sides. A reinforcing frame 2c is appropriately attached along both side frames 2a, 2a, and an extendable leg 4 is attached to a lower end of the support leg 3 by a locking pin 5 so as to be adjustable in extension and contraction. I have.

The difference between the present invention and the prior art is that
Of the front ladder leg 2 and the rear support leg 3, one end is pivotally connected to the rear support leg 3 to form a pivot support 7, and the other end is a ladder leg. An open / close operation rod 9 which is a free end portion 8 having a length extending forward from
A configuration is adopted in which the support leg 3 can be opened and closed with respect to the ladder-like leg 2 by pushing and pulling the opening and closing operation rod 9 forward and backward on the front side of the ladder-like leg 2. It is becoming.

As described above, the present invention relates to a conventional tripod stepladder 1
Since the opening / closing operation rod 9 is attached to the supporting leg 3, the opening / closing operation of the leg of the tripod stepladder 1 can be performed very easily. That is, when leaning the tripod step 1, as shown in FIG. 3A, the user M gradually leans the tripod step 1 in a state of being closed from the ladder-like leg 2 side.
FIG. 3B shows a state in which the tripod stepladder 1 stands substantially vertically upright.
As shown in the figure, the user holds the ladder-like leg 2 with one hand from the side of the ladder-like leg 2 and holds the vicinity of the free end 8 of the opening / closing operation rod 9 with the other hand. The support leg 3 is opened by performing an operation of pushing the support leg 3 into the support leg 3 side,
When the leg is opened at a predetermined opening angle between the ladder-like leg 2 and the support leg 3 as shown in (c), the user climbs directly from the step 2b of the ladder-like leg 2. Pruning work or the like may be performed.

Further, when the legs are closed, the same ladder-like leg 2 is moved from the state shown in FIG. 3C to the state shown in FIG.
It is only necessary to move the lightweight support leg 3 toward the ladder-like leg 2 by operating the opening and closing operation rod 9 on the side.

As described above, according to the present invention, the user:
Since both the open leg operation and the closed leg operation of the tripod leg 1 can be performed easily on the ladder-like leg 2 side, there is an advantage that these operations can be performed quickly and easily without fatigue.

If the pivot 7 of the opening / closing operation rod 9 is formed by a universal joint 7A which can swing up, down, left and right with the pivot 7 as a fulcrum as shown in FIG. The leg operation and the closing operation can be performed at any position of the ladder-like leg 2 as shown in FIG. 1. Further, when climbing the ladder-like leg 2 and performing a pruning operation or the like, the opening / closing operation rod 9 is used. It can be freely moved to a position where it does not hinder the work.

Further, as also shown in FIG. 2, the operating rod 9 is put in place on the open / close operating rod 9 by the step 2b of the ladder-like leg 2.
3C, the ladder-like leg 2 with respect to the horizontal plane is most stable when the tripod stepladder 1 is installed on a horizontal plane as shown in FIG. 3C, for example. When the inclination angle α is about 75 °, the engaging portion 10 engages with the step bar 2b, so that the support leg 3 can be safely operated without accidentally opening and closing during the operation. Can be. Of course, adjustment of the opening / closing angle between the ladder-like leg 2 and the support leg 3 can be easily performed by pushing and pulling the opening / closing operation rod 9 at the front side of the ladder-like leg 2.

[0018]

According to the first aspect of the present invention, in a tripod comprising a ladder-like leg and a single support leg, the user can perform both the leg opening operation and the leg closing on the front side of the ladder-like leg. Operation,
In addition, the opening and closing angle can be easily adjusted, and since only the simple operation of opening and closing the support leg is mainly performed, these operations can be performed quickly and easily without fatigue.

According to the second aspect of the present invention, the pivoting portion of the opening / closing operation rod is formed by a universal joint which can swing up, down, left and right with the operation rod as a fulcrum. When performing a pruning operation or the like by climbing or closing a leg or a ladder-like leg, the opening and closing operation rod can be freely moved to a position where the above operation and operation are not hindered.

According to the third aspect of the present invention, an engaging portion for engaging the operating rod with the step of the ladder-like leg is provided at an appropriate position of the opening and closing operation rod, so that the operating rod can be climbed on the ladder-like leg. When performing a pruning operation or the like, the support leg can be safely operated without being opened and closed unexpectedly.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of the main part.

FIG. 3 is an explanatory diagram showing the same use state.

FIG. 4 is an explanatory diagram showing a use state of a conventional technique.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 tripod stand 2 ladder leg 3 support leg 7 pivot 7A universal joint 8 free end 9 opening and closing operation rod 10 hook

Claims (3)

(57) [Claims] 1. A tripod on which a top end of a front ladder-shaped leg opened in a C-shape and an upper end of a single support leg on the rear side are openably and closably connected. An open / close operation rod having one end pivotally connected to the body to form a pivot, and the other end serving as a free end having a length extending forward from the ladder-like leg; A tripod on which the supporting leg can be opened and closed with respect to the ladder-like leg by pushing and pulling the opening and closing operation rod back and forth on the front side of the body. 2. The tripod according to claim 1, wherein the pivot portion of the opening / closing operation rod is a universal joint capable of swinging the operation rod up, down, left and right with the pivot portion as a fulcrum. 3. The tripod stepladder according to claim 1, further comprising a hook portion for hooking the operation rod to the ladder-like leg at an appropriate position of the opening / closing operation rod.