JP7153823B1 - Underslung crane gondola - Google Patents

Abstract

INDUSTRIAL APPLICABILITY The present invention enables a gondola used in a crane for high-altitude work to be efficiently positioned at a desired position by threading between branches while removing obstructive branches, thereby preventing accidents that occur when felling trees. The challenge is to provide gondola technology that protects workers and emphasizes safety and efficiency. A gondola for a suspended crane, the gondola having a boarding frame that secures a space for a worker to board and work, and a bottom part of the boarding frame. The most characteristic feature is the structure having a lower branch-removing conical part formed in a conical or polygonal shape that can be advanced while removing branches. [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a gondola technology for high-place work, and more particularly to a suspension gondola technology capable of efficiently felling trees while removing branches and ensuring the safety of workers.

In recent years, in Japan, there is a huge number of trees such as garden trees and forests that need to be felled. In such a case, it is necessary to entrust a professional such as a landscaper, especially when cutting trees that are far from the roadside, trees that are over 30 meters tall, or trees that are adjacent to buildings. For example, we will borrow the power of sky masters and cranes who climb trees and work on felling.

However, the work of a sora-shi is a special and dangerous work, and since it involves climbing trees and working in high places for a long time, it is necessary to make decisions based on tree-climbing skills and experience rather than physical strength. In recent years, the number of deaths in the forestry industry has been around 50 per year, and there is data on the number of deaths of just under 80 in many years. In this way, the work is always close to death, so even in the forestry industry, karashi, in particular, are on the decline, while the number of felling large trees is on the rise, and it is expected to increase even more in the future. situation.

In addition, when felling large trees, it is possible to use a gondola attached to a crane truck that can ensure safety. It goes without saying that the cost of logging will be a high burden.

Also, crane truck work can be said to be safer than airman work, but the work involves hanging a gondola from the top of the crane and having people on it. This work is also dangerous, and it is important to take steps when cutting down large trees. First of all, the work of cutting off the obstructing branches is done, but it is necessary to push through many branches to attach the gondola to the desired place, and each time the crane is operated and the work of cutting off the obstructing branches is repeated. Become. At present, this cannot be said to be efficient work, and it can be said that there is a need for a technology that can avoid danger and efficiently cut down trees.

One of the most promising advancements in the technology is the improvement of gondolas. I think that there is a way to solve the above problems by paying attention to this gondola and improving it.

Therefore, in view of the above problems, various technical proposals have been made. For example, a technique entitled "Unique Arm Suspension Scaffolding" has been disclosed (see Patent Document 1). The related technology "provides a scaffold for suspending the unic arm that is attached to the end of the arm of the unic and is suitable for performing work on the side where the unic is placed and the opposite side straddling the work." Specifically, the scaffold is a gondola-shaped scaffold formed by laying scaffolding boards on the bottom and enclosing the upper part with handrail frames on all four sides. A support socket is provided in which the lower end of the support rod is fitted, and the support rod whose lower end is fitted in the support socket is detachably attached to the back of the handrail frame with a clamp member, and the hoist is hooked to the support rod. The scaffold is attached detachably to the clamp member, and by winding the wire rope, the scaffold is raised and lowered with the upper end of the support rod being guided by the guide hole attached to the tip of the arm. It is a scaffold.” However, the technique described in Patent Document 1 is a scaffold that is hung on a unique arm, and since the bottom is flat, it cannot be moved by sewing tree branches, and the frame is light. Therefore, it is not suitable for felling trees, and there is a risk that felled trees will collide with the work.

Also, a technique entitled "Gondola for Crane Mounting" is disclosed (see Patent Document 2). Specifically, "Two arms equipped with attachments that can be attached to the holes of the jig tension rod attachment part at the tip of the beam of the crane vehicle, and an arm with attachments that can be hung on the bracket of the jig foot bin attachment part. The center of gravity of the basket B is the center of gravity of the cage B, with the tip portion of the support frame constructed by connecting the two arms with a fork shape on both sides and the back part of the support frame is recessed inward. A ratchet wheel is fixed to the direction of the fixed shaft H, a locking device provided with a pawl with which the ratchet wheel engages, and a break disk on the other side of the fixed shaft. and a handbrake device provided with a brake band that holds the brake disk is provided in the cage." . However, although the technology described in Patent Document 2 is common to the present invention in that the gondola is attached to a crane vehicle, the problem of the present invention is to provide a gondola that can move between trees that are problematic in felling. I haven't reached a solution yet.

Also, a technique entitled "Gondola for aerial work vehicle" has been disclosed (see Patent Document 3). Specifically, "In a gondola for high-place work, a scaffold for operation is provided on the lower stage of the gondola, a scaffold for work is provided on the upper stage of the gondola, and the front part of the gondola is curved. Characteristic high altitude work gondola”. The technology described in Patent Document 3 is common to the present invention in that it is a gondola for high-place work and that the shape of the gondola is curved at the front to facilitate work. However, by improving the shape of the gondola side, it cannot be said to be very effective in felling trees that are forced to move up and down. This is different from the technology of the present invention, which aims to improve work efficiency.

Utility Model Registration No. 3124057 Public practical use S53-7650 Published Practical Application No. S60-96400

The present invention makes it possible for a gondola suspended from a crane to thread between branches while removing obstructive branches, and to efficiently move the gondola to a desired position, thereby saving workers from accidents that occur when felling trees. The challenge is to provide gondola technology that can protect, protect, and emphasize safety and efficiency.

The present invention is a gondola for a hanging crane, which has a boarding frame that secures a space where a worker can board and work, and a bottom of the boarding frame that can move forward while removing branches. Alternatively, a configuration having a lower branch-removing conical portion formed in a polygonal shape is adopted.

Also, in the present invention, the boarding frame has an upper branch-removing conical part and a bottom branch-removing conical part formed in a conical or polygonal shape that can move forward while removing branches at the top and bottom. can also be adopted.

It is also possible to employ a configuration provided with a safety belt that connects the crane by bypassing the top and bottom of the hook.

It is also possible to employ a configuration in which a weight is provided at the bottom of the boarding frame or at the conical portion for removing lower branches.

According to the gondola for a suspended crane according to the present invention, since the bottom of the gondola has a flat shape in the existing gondola, the bottom can be caught by branches during descent, thereby smoothing the descent. However, in the present invention, the boarding frame is threaded between the branches of the tree when the boarding frame descends due to the lower branch guard conical part provided at the bottom of the boarding frame in the hanging gondola. It exerts an excellent effect that it becomes possible to move by pressing.

In addition, in the gondola for hanging cranes according to the present invention, when a configuration is adopted in which an upper branch-removing conical portion is provided on the upper part of the boarding frame, the boarding frame will sew between tree branches when ascending. It exerts an excellent effect that it becomes possible to move by pressing.

In addition, in the gondola for a suspended crane according to the present invention, when it is configured to have both the branch-removing conical portions above and below the boarding frame, the lower branch-removing conical portion and the upper branch-removing conical portion It has the excellent effect of being able to move through tree branches both when ascending and descending.

In addition, in the gondola for a suspended crane according to the present invention, when it is configured to have a branch-repellent cone-shaped portion at the top and bottom of the boarding frame, it is possible to minimize getting wet even when it rains. It has the excellent effect of making it possible to work in a controlled state, and because it is not affected by the weather, it is possible to reduce the burden of damage due to weather-related schedule changes, such as crane truck lease fees and workers' daily wages. It has excellent effects such as

In addition, according to the gondola for a hanging crane according to the present invention, when a weight is attached to the lower branch guard conical portion, even the branches of a thick standing tree T can be easily moved through the space. It has an excellent effect of becoming

Further, according to the gondola for a hanging crane according to the present invention, when it has a boarding frame part, a lower branch-removing conical part, and an upper branch-removing conical part, the operator can board The above-mentioned members cover the space to be cut, thereby exhibiting an excellent effect that it is possible to prevent an accident such as a worker being hit by a cut branch or the like.

In addition, in the gondola for a suspended crane according to the present invention, if a crane having a main hoisting hook and an auxiliary hoisting hook is used, it is possible to carry out the work of hooking the branches to the crane while riding on the gondola before cutting the branches. Since the cutting work can be performed by moving the branch, the burden of the fixing work of the branch by the conventional kashishi can be reduced, and even an inexperienced person can work safely.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a basic configuration explanatory diagram for explaining the basic configuration of a gondola for a suspended crane according to the present invention; FIG. 2 is an explanatory diagram of an implementation state showing an example for explaining the state of the gondola for a suspended crane according to the present invention; FIG. 4 is a first work state explanatory diagram for explaining the work state of the gondola for suspension type crane according to the present invention; It is a second work state explanatory view explaining the work state of the gondola for suspension type cranes according to the present invention. FIG. 5 is a third work state explanatory diagram for explaining the work state of the gondola for suspension type crane according to the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a first embodiment for explaining an embodiment of a gondola for hanging cranes according to the present invention; FIG. 2 is an explanatory diagram of a second embodiment for explaining an embodiment of a gondola for a suspended crane according to the present invention;

The present invention is a gondola for a hanging crane, which has a boarding frame that secures a space where a worker can board and work, and a bottom of the boarding frame that can move forward while removing branches. Or, it is most characterized by having a lower branch-removing conical part formed in a polygonal shape. Description will be made below with reference to the drawings. However, the shape and configuration are not limited to those described in the drawings, and can be changed within the range where the effect exhibited as the creation of the technical idea of the present invention can be obtained.

FIG. 1 is a basic configuration explanatory diagram for explaining the basic configuration of a gondola for a hanging crane according to the present invention, and FIG. FIG. 1(b) shows a configuration in which only the conical portion for removing lower branches is provided. FIG. 1(c) shows a configuration in which an opening/closing door 11 for entry/exit of the worker H is provided in a part of the boarding frame portion 10. As shown in FIG.

The present invention is a gondola for a suspended crane, which has a boarding frame 10 that secures a space for a worker H to board and work, and a branch is removed from the bottom of the boarding frame 10. It has a lower debranching conical portion 30 which is formed in the shape of a cone or polygon which can be advanced.

The boarding frame portion 10 is a frame portion that creates a space area for the operator H to ride on, and is a frame that forms a gondola. The shape is formed in a round or polygonal shape in plan view, and the one shown in the drawing is configured in a hexagonal shape. As for the material, metals such as iron, aluminum, and stainless steel can be considered. Most ordinary structures are intended to be lightweight, but in the present invention, it can be said that it is more convenient to have a large weight, which is convenient for avoiding branches and the like. Therefore, the boarding frame portion 10 can be designed to have a strong structure.

The opening/closing door 11 facilitates entry and exit of the worker H into and out of the boarding frame portion 10 . Although not particularly shown in the drawings, it is desirable to provide the opening/closing door 11 with a fixing mechanism for restricting opening/closing in consideration of safety.

The hanging ring 20 is a hook F that hangs the boarding frame 10 from the crane K, and is sufficiently durable even if the boarding frame 10, the worker H, and the equipment used for felling are loaded. It must be strong and must be able to withstand strong winds and rain. The suspended ring 20 is engaged with the auxiliary winding hook F2 on the auxiliary winding side of the two winding devices for the main winding and the auxiliary winding.

The lower branch removing conical portion 30 removes branches that obstruct movement to a desired location when moving the gondola for a hanging crane downward during felling work. However, by providing a cone-shaped branch-removing conical part at the bottom of the boarding frame part 10, it is possible to sew between the branches. It is possible to move efficiently.

The upper branch removing conical portion 40 removes branches that obstruct movement to a desired location when moving the gondola for a suspended crane upward during tree felling work. However, by providing a cone-shaped branch-removing conical part on the upper part of the boarding frame part 10, it is possible to sew between the branches. It is possible to move efficiently.

The safety belt is 50, and it is a string-like thing such as a wire that is hung on the hook F. In the unlikely event that the gondola for the suspended crane comes off the hook F or a heavy tree or the like collides with it, an unexpected situation may occur. It is a life-saving auxiliary tool for preventing the gondola 1 for a suspended crane from falling even when the gondola 1 falls.

The weight 60 is a weight 60 for attaching the cone-shaped branch-removing conical part 30 provided at the bottom of the boarding frame part 10 so that the conical part 30 can smoothly move downward. The weight 60 is only an auxiliary one for facilitating the downward movement of the boarding frame portion 10 while removing the branches.

In the description of the present invention, the crane K is a hoist-type lifting device provided in a working vehicle, also called a mobile crane vehicle C1 used for felling, and is used to fell tall trees to the felling site. It needs to be stable so that it has a long reachable boom B1 and can also carry felled branches and standing trees T by hanging.

The hook F is a hook F attached to the crane K, and is used for hooking the gondola 1 for the suspension type crane to the tip of the crane K and fixing it. The hooks F are a hook F2 for hanging the gondola and a hook F1 for hanging pruned branches and the like. Two so-called main winding hooks F1 and auxiliary winding hooks F2 are required. In addition, the weight of the gondola must be strong, considering the weight of the gondola body, the worker H, and the base material used for logging, and considering various conditions such as strong winds.

2A and 2B are diagrams illustrating an embodiment of the gondola for a hanging crane according to the present invention. FIG. It shows the state of working with FIG. 2(a) shows a configuration in which both the lower branch-removing conical portion 30 and the upper branch-removing conical portion 40 are provided. FIG. 2(b) shows a state in which the worker H is working with a pruning tool such as a chainsaw for felling or the like in a configuration in which only the conical portion 30 for removing lower branches is provided. ing.

FIG. 3 is a first working state explanatory diagram for explaining the working state of the gondola for hanging crane according to the present invention. Fig. 3(a) shows a state in which the gondola for hanging crane according to the present invention is placed sideways, and Fig. 3(b) shows a state in which a worker H is on board. Fig. 3(c) shows a state in which the gondola 1 for a suspended crane according to the present invention is lifted by a crane K, and Fig. 3(d) ) shows a state in which the hook F of the crane K is lowered from the suspended state to lower the gondola 1 for the suspended crane.

4A and 4B are explanatory diagrams of the second working state for explaining the working state of the gondola for a suspended crane according to the present invention, and FIG. FIG. 4(b) shows a state in which the branches are pushed aside by the lower branch-removing conical portion 30 at the bottom to work between the branches.

FIG. 5 is a third working state explanatory diagram for explaining the working state of the gondola for a hanging crane according to the present invention, and FIG. , and FIG. 5B is a plan view showing an explanatory state for explaining the procedure for cutting off a branch. As shown in FIG. 5(a), first, considering the weight balance of the branches to be pruned by operating the auxiliary hoisting crane K that hangs the boarding frame 10, a shackle or wire is placed at the binding position P1, which is the center of gravity of the branches. etc., and hooked on the main winding hook F1. The bundling position P1 depends on the operator H's experience and sense, but the position varies depending on the state of the branches, the degree of attachment of leaves, and the like. Next, the auxiliary hoisting crane K is operated to move the suspension type crane gondola 1 to the cutting position P2 for cutting off the branch, and the branch is cut off. As shown in FIG. 5(b), the gondola seen from above in a plan view has a wider area near the center that can be entered, and the thinner branches are denser toward the tip of the branches, and it is necessary to avoid the branches in order to descend straight. Must-have. In the gondola for hanging cranes according to the present invention, it is possible to penetrate branches by pushing them by means of the lower branch protection conical portion 30 provided at the bottom. Also, as shown in the drawing, at the binding position P1, after binding to the main hoisting hook F1, the crane K is operated to the base of the branch to move the gondola 1 for hanging crane to the cutting position P2. It is what is done.

The main hoisting hook F1 is usually provided with two hoisting devices in the mobile crane K, and is for heavy loads with an increased number of hoisting wire ropes, such as three or four. is called the main hoist, and the main hoist hook F1 (also called the parent hook) is suspended from this. In the present invention, it is a hook F that predicts the center of gravity of a branch to be felled, hangs a rope on it, lifts the cut branch, and connects it to move it to a desired position.

In the mobile crane K, the auxiliary hoist for hoisting a load with a single rope is called an auxiliary hoist, and the auxiliary hoist hook F2 (also called a grandchild hook) is suspended from this. In the present invention, it is a hook F that connects the gondola 1 for a suspended crane on which the felling worker H is placed so as to ascend and descend. In the case of the main hoist with a maximum rated total load of 25 tons, the auxiliary hoist has a lifting load of about 4 tons. Even if a large worker H with a weight of 150 Kg gets on, the total load does not pose a problem.

The safety belt 50 uses a shackle, a wire, or the like to prevent the gondola 1 for hanging crane from falling even if the auxiliary hoisting hook F2 comes off in order to ensure the safety of the felling operator H. It should be preliminarily connected.

FIG. 6 is an explanatory diagram of a first embodiment for explaining an embodiment of the gondola for suspended crane according to the present invention. In the embodiment shown in the drawings, the gondola 1 for hanging crane according to the present invention, which uses the crane K of the mobile crane vehicle C1, is wide even in places where the gondola cannot reach the aerial work vehicle C2 due to the obstruction of the house. It indicates that the work place is reachable in the range.

FIG. 7 is an explanatory view of a second embodiment of the gondola for suspended crane according to the present invention. In the embodiment shown in the drawings, when it is necessary to prune or cut trees grown on a cliff or the like, the gondola cannot reach even if the boom B2 is extended when approaching from a low place with the aerial work vehicle C2. Sometimes. Even in such a situation, if it is within the range of the lifting height below the ground surface (underground lifting height) of the total lifting height, it is possible to work from a high place using the crane K of the mobile crane car C1. ing.

According to the gondola 1 for a suspended crane according to the present invention, it is possible to safely and efficiently cut down standing trees with danger, so it is considered to have high industrial applicability in the forestry industry. is.

1 Gondola for Suspended Crane 10 Boarding Frame 11 Opening/Closing Door 20 Suspension Ring 30 Conical Section for Lower Branch Protection 40 Conical Section for Upper Branch Protection 50 Safety Belt 60 Weight K Crane F Hook F1 Main Hoist F2 Auxiliary Hoist Hook H Worker T Standing tree P1 Binding position P2 Cutting position B1 Boom B2 Boom C1 Mobile crane C2 Aerial work vehicle

Claims (4)

A gondola (1) for a suspended crane, having a boarding frame (10) that secures a space for a worker (H) to board and work,
It has a hanging ring (20) that can be hung using a crane (K) on the top, and the bottom of the boarding frame (10) is formed in a conical or polygonal shape that can move while removing branches. A gondola (1) for an underslung crane, characterized in that it has a lower debranching cone (30) which is shaped like a sling. 2. The upper part of the boarding frame part (10) also has an upper branch-removing conical part (40) formed in a conical or polygonal shape that can move forward while removing branches. gondola (1) for underslung cranes. The gondola (1) for a suspended crane according to claim 1 or 2, further comprising a safety belt (50) that connects the crane (K) by bypassing the top and bottom of the hook (F). . 3. The gondola for a hanging crane according to claim 1 or 2, characterized in that a weight (60) is provided on the bottom of the boarding frame (10) or the lower branch-removing conical portion (30). 1).

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