JPH0616151Y2 - Brace that can be moved up and down and moved easily - Google Patents

Description

[Detailed description of the device] "Industrial application field" The present invention is a ladder used for pruning branches and leaves, collecting fruits, and at construction sites. It is particularly suitable for agricultural work and can be easily moved or stored. It's about a mating ladder.

"Prior art" Conventionally, as a ladder for this kind of farming work, a three-legged ladder that can be installed relatively easily on the ground having irregularities or the like, or as technical literature, for example, Japanese Utility Model Publication No. 54-24845.
A single ladder consisting of one main pillar and two auxiliary pillars pivotally attached to it, and in Japanese Utility Model No. 55-27358, a stabilizer is attached to the tip of the ladder and a stabilizing auxiliary leg to the rear end. There are ladders for pruning, etc. Further, as a technical document having a configuration in which the standing angle is variable for the same purpose as the present invention, there is
No. 6-845 Working rope with wire rope retractable and unwound, adjustable angle, Jitsuko Sho 50-3417
The adjustable ladder consisting of the No. 9 stanchion and the second connecting link, and the free-standing ladder in which the tread is always held in a horizontal state, and other lock holes of the mold material attached to the chassis of the automobile of No. 61-65199 There have been proposed moving ladders, etc., in which the lower end projections of the ladder can be inserted and removed and whose rising angle can be adjusted, and some of them have been put to practical use.

"Problems to be solved by the invention" In each of the above-mentioned examples of the prior art, a considerable effect can be expected, but lack of stability, experience in use and operation, simple and easy There are common problems such as freedom of use and inability to carry it, and when viewed individually, tripods for agricultural work or a single ladder are certainly convenient, but on the other hand Since it is used, there is a risk that the branches and leaves will be scratched and the skin will peel off, and stability and footing will not be sufficient when climbing a ladder. Mitsumi Kosho 36-845
No., Jikkō Sho 50-34179, Jikkai Sho 61-6519
No. 9 has the advantage that the angle of inclination of the ladder is variable, but it is relatively large, and it is difficult to make small turns, and the structure is complicated, so it is suitable as a ladder for pruning for agriculture, fruit collection, etc. Not suitable. In addition, when carrying or moving, in principle it is necessary to lift and grasp, which is very troublesome. Especially when it comes to moving while holding tools such as pruning for agricultural work and collecting fruits. Therefore, there is a strong demand for a ladder that can be easily carried (transported) or moved.

"Means for Solving Problems" In view of the above, the present invention is capable of being easily carried or moved, has stability, is easy to use, and is easy to stand up or store. The purpose of the present invention is to provide a braided ladder optimal for agricultural work that has the effect of, and its gist is a ladder base that is mounted in a tilting manner on a moving device such as a wheel system or a small drive vehicle system, and this ladder base. A locking mechanism provided with a locking member and a guide rod provided with the provided locking groove for muscular locking, and detachable from the locking groove of the locking member constituting the locking mechanism, and A brace that has a lock rod that is movably inserted in the gap between the locking member and the guide rod at the tip, and is pivotally attached to the rear end of the brace and the rear end of the ladder base. It is made up of a retractable ladder and is installed at the rear end of the brace. The lock rod is lifted through the handle, the lock rod is moved forward in the gap, and then the tip of the brace is fixed to the locking mechanism by fitting with the lock groove. The ladder is configured to be held in an upright state on the ladder base via the upright position, and the engagement between the brace post and the ladder base is released by removing the guide rods at both ends of the lock rod. After the pillars are stacked on the ladder base, the ladder is superposed on the pillar base to store the ladder, and the structure is freely undulating and can be easily moved.

[Operation] Next, the operation of the present invention will be outlined. When the braces and ladders are superposed on the ladder base of the moving device, the ladder is in the stored state. When using the ladder from this state, first move the ladder to the place of use. After that, the ladder is first raised, and the braces are put on or suspended from the ladder in the standing state. That is, the brace is attached to or suspended from the ladder with the pivot portion of the brace as a fulcrum, and in this state, the lock rod at the tip of the brace is slightly expanded with the guide rod constituting the locking mechanism. The guide rod is opened, and the guide rod is inserted so as to straddle the guide rod, and the guide rod and the locking member are fitted into the gap. Then, first, the handle is pushed down so that the lock rod at the tip of the brace is moved forward in such a state that the lock rod is slidably contacted with the guide rod in the gap formed by the guide rod and the locking member constituting the locking mechanism. When the ladder is moved (to the left in FIGS. 1 and 9), the ladder that was in the upright state is erected in the inclined state. In this way, when the pushing down of the handle is released when the ladder is in the predetermined upright state, the lock rod is fitted and locked in the lock groove of the locking member that constitutes the locking mechanism, and the tip end portion of the bracing column is locked. Is fixedly supported by the locking mechanism, and the ladder is supported at a predetermined inclination angle by fixing the brace. Then, by extending the second ladder on the telescopic side, the second ladder is extended on the first ladder to form an extended ladder of a certain length. Therefore, agricultural work is performed with the ladder in this stretched state.

In this way, in the case where the ladder is to be stored at the end of agricultural work or after a break, the second ladder is first stored in the first ladder. Then, push up the handle to lift up the brace, and remove the lock rod from the lock groove, and release the fitting lock between the lock rod and the lock groove. It will be located in the gap formed by the member and the guide rod. Therefore, when the guide rod is opened slightly and the lock rod is removed from the guide rod through this expanded state, the lock rod and the locking mechanism are released from each other, and thus the bracing pillar is released. The engagement relationship between the locking mechanism and the locking mechanism is released. So, position the tip of the braces to the tip of the ladder base and stack them together.
The ladder is stored by superposing the ladder on the brace. In this way, when the vehicle is stored, it is then moved or transported to the original storage place by the wheel group of the moving device or the small drive vehicle.

[Embodiment] The drawings show an embodiment of the present invention, in which reference numeral 1 is a frame-type ladder base mounted on a moving device A, and a supporting plate 2 provided at a rear end portion 1a of the ladder base 1. The ladder 3 is rotatably and pivotally attached via the. The ladder 3 is composed of a first ladder 3a and a second ladder 3b, and the second ladder 3b is housed in the first ladder 3a in a nesting manner. The step rail 4a of the first ladder 3a is fixed to the outside of the first ladder 3a as shown in the figure, and the step rail 4b inserted between the second ladders 3b is cut off from the first ladder 3a as shown in the figure. Located in the groove, the step rail 4b moves up and down in the first ladder 3a in response to the sliding movement of the second ladder 3b in the cut groove. The shape of the first ladder 3a is preferably a C-shaped steel material, but is not limited to this example.

By the way, the moving device A may be of two types, at least as shown in the figure. For example, in the wheel group type shown in FIGS. 1 to 5, a pair of wheels 6 and 6a are attached to the tip portion 1b of the ladder base 1. The wheel base 8 is pivotally mounted and pivotally mounted via a bracket provided on a support plate 7 extending to the center (widthwise center) of the frame member at the rear end 1a. , 6a and 8 are mounted in a downward slope, or in a small drive vehicle system such as a cultivator shown in FIG.
A pair of wheels 6, 6a are provided on the tip portion 1b of the ladder base 1, and a retaining ring 9 provided at the center of the frame material of the rear end portion 1a is attached to a U-shaped support tool 10a provided on the small drive vehicle 10 with a retaining pin. 11
There is also one in which the ladder base 1 is attached to the small drive vehicle 10 in a downward slope as shown in the figure. Then, in some cases, the ladder base 1 can be adopted in both of the above-mentioned methods, and in the small drive vehicle method described later, this ladder base 1 can be easily attached to and detached from the small drive vehicle 10. There is also a stopper device (not shown) for the wheel system or the like.

Reference numeral 12 is a hinge-type stopper mounted on the uppermost step rail 4a of the first ladder 3a. This stopper 12 works by extending into the first ladder 3a as shown in FIG. A desired step rail 4b such as the lowest step of the second ladder 3b is mounted on the upper side, and the appropriately extended second ladder 3b is fixedly supported on the first ladder 3a. On the contrary, the stopper 12 does not work by folding the stopper 12 to the outside of the first ladder 3a as shown in FIG.
It does not hinder the slide described above in b.

In the figure, 13 is a basket frame that can be raised and lowered.

Reference numeral 14 is a brace that is formed by pivotally attaching the rear end portion to the first ladder 3a of the ladder 3, and the brace 14 is provided with a handle 15 that pushes down the tip end thereof. Further, a lock rod 16 which is fitted into a lock groove of a locking member which constitutes a locking mechanism which will be described later is provided at the tip portion thereof.

Reference numeral 17 denotes a locking mechanism. The locking mechanism 17 is provided with a locking member 18 provided from the front end portion 1b of the ladder base 1 toward the rear end portion 1a thereof, and further on the upper surface of the longitudinal side surface member of the ladder base 1 frame member. , The lock groove 1 opened in the upper part of the locking member 18
9 and a guide rod 20 erected on the locking member 18 at an appropriate interval B. Lock groove 1
9, a lock recess 19a is provided as shown in the figure,
The lock rod 16 is securely fitted into the lock recess 19a, and thus the lock rod 16 is securely locked in the lock groove 19. Therefore, the operation of the handle 15
Specifically, unless the struts 14 are moved forward and the handle 15 is pushed up, as a general rule, the lock rod 16 from the lock recess 19a is not removed. By the way, the case where the ladder 3 is erected, inverted or stored through the locking mechanism 17 and the lock rod 16 having the above-described structure will be described in detail.
When the ladder 3 is superposed, the ladder 3 is in the stored state. Then, when the ladder 3 is raised from this state, the ladder 3 is first raised, and the braces 14 are sprinkled or hung on the ladder 3 in the raised state. That is, with the pivotal portion of the braces 14 as a fulcrum, the braces 1 are attached to the ladder 3.
4 is attached or suspended, and in this state, the lock rod 16 at the tip of the brace 14 is slightly expanded with the guide rod 20 constituting the locking mechanism 17, and the expanded guide rod 20. It is inserted so as to straddle over and is fitted into a gap B formed by the guide rod 20 and the locking member 18. Then, first, the handle 15 is pushed down and the lock rod 16 at the tip of the brace 14 is pushed.
The guide rod 20 and the locking member 1 which constitute the locking mechanism 17.
8 is moved forward in a state of slidingly contacting the guide rod 20 in the gap B constituted by 8 (toward the left in FIGS. 1 and 9).
As it is moved, the ladder 3 that was in the upright state is erected in an inclined state. In this manner, when the lock rod 16 of the brace 14 is in the upper surface of the predetermined lock groove 19, that is, when the ladder 3 is in the predetermined upright state, when the pushing down of the handle 15 is released, the lock rod 16 is locked. The tip of the brace 14 is fitted and locked in the predetermined lock groove 19 and the lock recess 19a of the mechanism 17, and is fixedly supported by the locking mechanism 17, and the ladder is fixed through the fixing of the brace 14. 3 is supported at a predetermined tilt angle. Then, by stretching the second ladder 3b on the telescopic side, the second ladder 3b is stretched on the first ladder 3a to form the stretched ladder 3 of a certain length. Therefore, agricultural work is performed with the ladder 3 in the stretched state. In this case, the cage frame 13 is rotated (counterclockwise) and mounted on the second ladder 3b at a substantially right angle as shown in FIGS. 1 and 6, and the cage is inserted into the cage frame 13. Accept.
The lock rod 16 of the brace 14 is fitted and locked in the lock groove 19 at a desired position of the locking mechanism 17, so that the ladder 3 having a predetermined inclination angle is held in an upright state.

In this way, when the ladder is to be housed after the agricultural work is completed or at a break, the basket hanging frame 13 is first rotated (clockwise), and the basket hanging frame 13 is attached to the second ladder 3b. Second
The ladder 3b is stored in the first ladder 3a. Then, the handle 15 is pushed up to lift the brace 14 so that the lock rod 16 is locked in the lock groove 19 and the lock recess 19a.
When the lock rod 16 is further removed and the fitting lock between the lock rod 16 and the lock groove 19 and the like is released, the lock rod 16 is inside the gap B formed by the lock member 18 and the guide rod 20 that form the lock mechanism 17. Will be located in. Therefore, when the guide rod 20 is slightly expanded and the lock rod 16 is removed from the guide rod 20 through the expanded state, the lock rod 1
The lock between 6 and the lock mechanism 17 is released, so that the brace 1
4 and the engagement mechanism 17 are released. Therefore,
The ladder 3 is housed by stacking the tip ends of the brace 14 so that they are positioned on the tip of the ladder base 1 and then superposing the ladder 3 on the brace 14. Thus, when stored, the wheels 6, 6a, 8 of the moving device or the small drive vehicle 10 are then used to move or carry the vehicle to the original storage location, or to another location (branch, field).
To move to.

Further, the lock rod 16 of the brace 14 is fitted and locked in the rearmost portion of the lock groove 19 of the locking portion agent 18 constituting the engaging mechanism 17, so that the locking rod 16 is held in a rearward inclined shape as shown in FIG. This is convenient for short-distance travel or temporary breaks.

[Advantage of the Invention] As described in detail above, the present invention provides the undulation of the braces by engaging and disengaging the locking rod and the locking mechanism through the operation of the handle.
Since the ladder can be erected or tilted backward, the ladder can be erected when it is used and stowed when it is not used, and can be stably and reliably erected or tilted at a predetermined angle. effective. Further, the present invention has a structure in which the ladder base is mounted in an inclined shape with respect to the moving device, so that the pruning for agricultural work can be performed on the ladder.
Even when performing agricultural work such as fruit collection or various works, there is an extremely small risk of being overturned, and various works can be performed safely and stably. Further, since the handle can be operated, the operation is simple and can be easily used by any person. In particular, in the present invention, the lock rod is configured to be detachable from the lock groove formed in the locking member that constitutes the locking mechanism, and the brace is superposed on the ladder base, and then the ladder is superposed. The size of the ladders can be reduced when they are stored, and they can be stacked and stored, which is very useful when storing or moving. Further, as described above, there are three modes of the standing state, the rearwardly inclined state and the stored state, and it is possible to provide a braced ladder optimal for agricultural work. Furthermore, it has a simple structure and is durable, making it ideal as a work ladder for agricultural pruning and fruit collection. Or, it is convenient because it can be easily moved with a moving device, and it is ideal for agricultural work in a relatively narrow place because it can be turned in a small circle.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a side view with a part omitted and a part omitted, FIG. 2 is a side view with a main part enlarged and a part omitted, and FIG. Figure is a side view with the ladder tilted backward, Figure 4 is a rear view of the main part of Figure 3, Figure 5 is a side view with the ladder stored, and Figure 6 is the first and second ladders. FIG. 7 is a side view of a partial cutout showing the relationship with the stopper, FIG. 7 is a side view of the partial cutout showing the relationship between the first ladder, the second ladder and the stopper, and FIG. 8 is the first ladder and the second ladder. FIG. 9 is a cross-sectional view showing the relationship with the ladder, and FIG. 9 is a side view showing another example with a part omitted. 1: Ladder base, 1a: Rear end part 1b: Front end part, 2: Support plate 3: Ladder, 3a: First ladder 3b: Second ladder, 4a, 4b: Steps 6, 6a, 8: Wheels 9: Stop Ring, 10: Small drive vehicle 11: Stop pin, 12: Stopper 13: Basket frame, 14: Brace post 15: Handle, 16: Lock rod 17: Locking mechanism, 18: Locking member 19: Lock groove, 20: Guide rod A: Moving device, B: Gap

Claims (4)

[Scope of utility model registration request] 1. A lock comprising a ladder base mounted on a moving device in an inclined manner, a locking member provided with a lock groove for locking a brace column provided on the ladder base, and a guide rod. A mechanism and a brace that has a lock rod at its tip, which is engageable with and disengageable from a lock groove of a locking member that constitutes this locking mechanism, and is movably inserted into a gap between the locking member and the guide rod. And a ladder pivotally attached to the rear end of the brace and the rear end of the ladder base, and the lock rod is lifted via a handle provided at the rear end of the brace, After the lock rod is moved forward in the gap, the tip of the brace is fixed by fitting with the lock groove, and at the same time, the ladder is held upright on the ladder base through the standing of the brace. With the structure, and by removing the guide rods at both ends of the lock rod, Disengaging the ladder base, stacking this bracing pillar on the ladder base, and then stacking the ladder on top of this to store the ladder. ladder. 2. A foldable and easily movable braided ladder according to claim 1, wherein the ladder is configured to be extendable and contractible. 3. A movable device is a wheel, and a ladder base is mounted on the wheel in a slanted manner. Bundling ladder. 4. A utility model registration claim in which the moving device is a wheel, and a ladder base is mounted on the wheel in a slanting shape, and a stopper is provided on the wheel.
A braided ladder that can be moved up and down freely and can be moved easily according to item (2), item (2) or item (3).