JPS62268432A - Excavator with crane - Google Patents

Abstract

PURPOSE:To exactly and safely lift up and move heavy objects a well as to provide both a soil excavating function and a lifting function for heavy objects together with a craning function for an excavator to be used in soil-excavating and discharging work. CONSTITUTION:A nearly a chevron-shaped first boom 6 is provided on a mobile vehicular body 1 in a vertically movable manner, and the second boom 8 is rotatably provided at the tip of the boom 6. A bucket 9 is connected to the tip of the second boom 8, and a crane mechanism 15 expandible to the longitudinal direction of the <-shaped upper side of the boom 6. During the usual excavating operation, the mechanism 15 is housed in the side face of the boom 6, and soil is excavated by the bucket 9. When lifting up heavy objects, the bucket 9 is temporarily taken in the downside of the boom 6, and heavy objects are lifted up and moved by the crane mechanism 15.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to excavating earth and sand in civil engineering and construction work,
The present invention relates to an excavator used for earth removal work, and particularly to an excavator with a crane, which is characterized by having a boom with a crane function.

[Conventional technology]

BACKGROUND ART Excavators with a bucket attached to the tip of a boom have traditionally been widely used for trenching, hole digging, etc., and are also widely used for road construction and buried object work. The only function of this excavator is to dig deep into the ground, and it is extremely effective in excavating large amounts of earth and sand with mechanical power.
The work efficiency was improved compared to manual labor. However, at work sites, in addition to the work of digging up earth and sand, there is also the work of burying pipes and pipes after digging them out, and covering the holes with iron plates, etc. , lifting heavy objects, and lifting and unloading fish were also required at the same time. When lifting heavy objects, there is no problem if the work can be done manually, but if, for example, lifting pipes or iron plates is required, a special crane truck must be used. It was something. However, at work sites where excavators are working, there are only a few work processes where a crane truck may be used at the same time, and it is not common for two vehicles to be prepared at the same time. .

In addition, in work sites where the left and right sides are narrow, only an excavator can do the work, and it was not possible to introduce a crane truck due to regional characteristics. Furthermore, the work of fishing heavy objects is extremely time-consuming compared to the work of digging earth and sand, and if a crane truck dedicated solely to the fishing function was introduced, time would be wasted driving the crane truck. Met.

For this reason, when lifting heavy objects during excavation work, conventional methods often involved hooking a wire to the bucket of an excavator and moving the boom supporting the bucket up and down. This was the current situation. It is extremely easy to lift heavy objects by hooking a wire to a bucket, but since excavators are not originally equipped to lift heavy objects, the wire can come off and scrape, creating a dangerous situation. At the same time, because they were used in ways that deviated from their original capabilities, the limit of the weight that could be caught was unknown, and highly dangerous work was performed.

[Problem that the invention seeks to solve]

In view of the above-mentioned drawbacks, the present invention provides an excavator with a crane function, thereby making it possible to simultaneously perform the work of digging earth and sand and the function of lifting heavy objects using the crane.

[Means for solving problems]

The present invention provides a first boom bent in a dogleg shape on a movable vehicle body so as to be swingable up and down.
A second boom is rotatably provided at the tip of the boom, and a bucket is connected to the tip of the second boom, and the upper side of the first boom bent in a dogleg shape is bent in the length direction. The present invention provides an excavator with a crane, characterized in that a telescopic crane m structure is provided at the top.

[Effect]

In the present invention, in the case of normal excavation work, the crane mechanism is
Store it out of the way on the side of the boom.
A bucket is used to excavate earth and sand.9 When fishing a heavy object, the bucket is temporarily attached to the bottom of the first boom, and the crane function is used to lift the heavy object.0Usually, civil engineering During work, the time required to lift heavy objects is extremely short, and most of the time is spent digging up dirt and sand, so the digging function can be used alternately depending on the purpose of use. It is possible.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

A front wheel 2 and a rear wheel 3 are pivotally supported on the front, rear, left and right sides of the vehicle body 1, respectively, and an endless crawler 4' is wound around between the front wheel 2 and the rear wheel 3. A swivel base 5 that can rotate 360 degrees with respect to the vehicle body 1 is placed at the top of the vehicle body 1, and a first boom 6 bent into a dogleg shape is mounted vertically at the center of the front surface of the swivel base 5. It is pivoted so that it can swing freely in the direction. Two hydraulic cylinders 7 are interposed between the right and left sides of the boom 6 at a slightly intermediate position and the swivel base 50, and the hydraulic cylinders 7 allow the boom 6 to move up and down. A boom 8 is connected to the tip of the boom 6, and a bucket 9 is connected to the tip of the boom 8. A hydraulic cylinder 10 is interposed between the boom 6 and the boom 80, and a hydraulic cylinder 11 is interposed between the boom 8 and the bucket socket 9. A cabin 12 in which a driver rides is fixed on the upper surface of the swivel base 5 on the front side, and a drive mechanism 13 housing an engine and the like is mounted at the rear of the swivel base 5. These configurations are conventionally well known excavator configurations.

The first boom 6 is bent into the dogleg shape.
On the side surface, a crane mechanism 15 is attached to the upper straight side surface. This crane mechanism 15 is equipped with a hydraulic cylinder and a winding mechanism inside, and has a conventionally known structure. The crane mechanism 15 is covered with a box-shaped cover 16 having a rectangular cross section, and a boom 17 having a rectangular cross section is inserted through the opening at the end of the cover 16 so that it can come out and retract in the length direction. has been done. A head with a built-in pulley, etc. is fixed at the tip of this boom 17, and a wire 19 is suspended from this head 18, and a pulley etc. is stored at the lower end of the wire 19, and the wire 19 is suspended from the head 18.
A hook receiver 20 is attached to change the direction of movement of the hook 9, and a hook 21 for slinging is attached to the lower end of the hook receiver 20. A retaining wire 22 for hooking and storing the hook 21 is attached to the lower end of the cover 16.

Next, the operation of this embodiment will be explained.

FIG. 2 shows the situation when lifting a heavy object using the crane function, in which the hydraulic cylinder 10.17 is extended to its maximum extent, directing the boom 8 to the underside of the boom 6, and lifting the bucket 9. It is stored by being rolled up on the underside of the boom 6. When operating the crane mechanism 15, the hydraulic cylinder 10
．． 11 is not activated. When the bucket 9 is stored on the lower surface of the boom 6, the sling is used to lift heavy objects, and the boom 17 is extended along its length from the cover 16, and the head 1
8 above the heavy object to be fished. By increasing the length of the wire 19, the hook receiver 2
0 in the vertical direction to bring the hook 21 close to the top of the heavy object. Further, in the work of lowering the crane, the tilting position of the crane mechanism 15 can be changed by expanding and contracting the hydraulic cylinder 7 to adjust the elevation angle of the boom 6, if necessary. After a heavy object is slung onto the hook 21, the wire 19 is pulled up by a winder built in the cover 16, so that the heavy object is hung onto the hook 21 and lifted. Thereafter, the length of the boom 17 can be varied and the hydraulic cylinder 7 can be controlled to move the heavy object to a predetermined position. In addition, if the distance to be moved is long, the crawler 4 may be operated in the lifted state to move the entire vehicle body 1 and move the heavy object to another work site.

Next, FIG. 3 shows the situation when the lowering function is temporarily stopped and the excavation work is performed. In this case, the boom 17 is retracted into the cover 16, and the head 18 provided at its tip is moved to near the tip of the boom 6 and stored out of the way. Then, by hooking the hook 21 onto the fastening wire 22 and pulling the wire 19, the hook receiver 20 and the hook 21 are fixed to the fastening wire 22, and the boom 6
Lock it so that it does not come into contact with other structures even if it is swung up and down.

By operating the hydraulic cylinders 7, 10, and 11 in cooperation with each other, the boom 6.8 and the bucket 9 can be linked to perform a conventional digging operation.

〔Effect of the invention〕

Since the present invention is configured as described above, the same excavator can perform the work of digging up earth and sand and the work of lowering and lowering heavy objects, and can satisfy both functions. be. In addition, since it has a dedicated crane function for lifting heavy objects, it is possible to reliably lift heavy objects, and it is not a temporary method of use such as hooking a wire on a bucket etc. with a conventional excavator, but a regular one. It can be used in a variety of ways, making it possible to safely and reliably lift and move heavy objects.

[Brief explanation of drawings]

FIG. 1 shows an excavator with a crane showing an embodiment of the present invention.
Figure 2 is a side view showing the state in which the crane function is activated;
FIG. 3 is a side view showing the state in which the excavation function is performed. 6.8...Boom, 7...Hydraulic cylinder, 15...
・Crane function, 16...Cover, 17...Boom, 19...Wire, 20...Hook receiver, 21.
··hook.

Claims (1)

[Claims] The first part is bent into a dogleg shape on the movable body.
A boom is provided to be able to swing up and down, and a second boom is provided to be rotatable at the tip of the first boom, and a bucket is connected to the tip of the second boom. An excavator with a crane characterized by having a crane mechanism that is extendable and retractable in the length direction of the side surface of the upper part that is bent into a dogleg shape.