JPH0446833A - Small drilling machine - Google Patents

Abstract

PURPOSE:To enable the drilling of a side wall with a standard work attachment fitted by forming a lower construction body and an upper frame body as divided type, and turning the upper frame body relative to the lower construction body with an actuator. CONSTITUTION:A lower construction body 15 and an upper frame body 18 are so formed as be separate from each other, and the upper frame body 18 is so constituted as to be capable of partially turning about a cylinder section 16, relative to the lower construction body 15 via a turning cylinder 22. In the aforesaid constitution, the upper frame body 18 is turned by an angle of betarelative to the lower construction body 15, and a swing cylinder 8 is operated for keeping the center line Q0 and Q'0 of a work attachment 10 in parallel to the center line P0 to P'0 of the lower construction body 15. As a result, the work attachment 10 can be offset to the side of the lower construction body 15, thereby enabling the drilling of a side wall.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a small excavator used to save labor in light excavation work, earth grading work, soil compaction work, etc., which have heretofore been performed manually.

Prior Art FIG. 9 is a side view of a small excavator 1 according to the prior art, in which 2 is a lower structure equipped with a traveling device (not shown), 3 is an upper frame body, and 4 is an upper frame body. 3 front swing bracket attachment part, 5 seat, 6 stabilizer plate, 7 beam roller, 8 swing cylinder, 9
is the swing bracket, 10 is the work attachment, 1
1 is the boom of the work attachment 10, 12 is the arm,
13 is a packet. FIG. 10 is a front view of the small excavator 1. FIG. 11 is a plan view of the small excavator 1. In the figure, A and A' are block walls in a narrow alley, the entrance is an obstacle such as a utility pole, and P-P' is the aircraft (
In this case, the fuselage is the longitudinal center (line) of the lower structure 2 and upper frame 3 which are fixedly formed to the body shape (the lower structure 2 and the upper frame 3 are referred to as the fuselage), and Q-Q is the longitudinal center of the work attachment 1o. . FIG. 12 is a side view showing a state in which a driver (indicated by a phantom line C) is seated on the seat 5 and operating the small excavator 1.

Next, the configuration and functions of the conventional small excavator 1 will be described with reference to FIGS. 9 to 12. An upper frame body 3 is integrally fixed to the upper side of a lower traveling body 2 equipped with a traveling device (not shown), and a work attachment 10 is attached to a swing bracket 9 at the front part of the upper frame body 3.
It is attached via. The driver operates from the rear of the aircraft.

A small excavator is used instead of a shovel when performing small-scale excavation work. For this reason, small excavators are not equipped with equipment such as counterweights. Therefore, when a longitudinal load is applied to the machine body during excavation work, the operator must ride on the seat or stabilizer plate. The driver's weight is used as a counterweight to stabilize the balance of the aircraft. Further, the work attachment 1o can be rotated left and right by expanding and contracting the swing cylinder 9.

Problems to be Solved by this Invention In order to reduce the manufacturing cost and take into consideration the balance of the machine body, conventional small excavators do not have an upper swing type structure, and are capable of side excavation. A work attachment (not shown, but a so-called ditch digging attachment) is not equipped, but the small excavator 1 sometimes performs excavation work in a path where there is an obstacle as shown in FIG. Even if the work attachment 10 is swung by an angle θ in an attempt to excavate near the block walls A and A, the packet 13 collides with the block wall A, It was not possible to excavate parallel to the

The driver's seat of the small excavator is designed so that the driver sits with his legs crossed, and his left and right feet are placed on the ground as shown in Figure 12. For this reason, the driver's weight could not be sufficiently applied to the aircraft to stabilize the balance, and the feet would quickly become fatigued due to lifting the driver's legs. Furthermore, when the small excavator is operated while seated on the seat, the seated position is not normal, as the user's feet are placed on the stabilizer plate.

This invention solves the above problems and provides a small excavator that can carry out side excavation by attaching standard work attachments, and an ergonomic way for the driver to rest his left and right feet when seated on the seat. The purpose of the present invention is to provide a small excavator equipped with steps that can be used to

Means for Solving the Problems The means of the present invention taken to solve the above problems are as follows: (1) A. The lower structure and the upper frame are formed in a split form, and the upper frame is connected to the lower structure. The body was configured to partially rotate via an actuator.

(2) B. In the small excavator according to claim 1, a stabilizer plate on which a driver rides and operates the excavator as a counterweight is disposed on the upper frame body.

<3) A. A step is rotatably provided on the side of the upper frame body, and when the driver uses the step, the step extends out to the side of the upper frame body and rotates, and when not in use, the step is rotated. It is configured so that it can be rotated and stored on the side.

Function (1) A. The pivot hole in the lower part of the upper frame body is rotatably fitted into the cylindrical part that stands on the upper part of the lower structure body.

Between the mouth and the upper frame body and the lower structure body,
An actuator is provided to partially rotate both of the above parts relative to each other.

C. When the actuator is operated in the manner described in B above, the upper frame body can partially rotate around the axis of the cylindrical portion of the lower structure.

(2) A. A small excavator that can partially rotate has a work attachment attached to the front part of its upper frame body. A stabilizer plate is installed at the rear of the upper frame body for the operator to ride on and operate as a counterweight, so it can handle loads in the longitudinal direction when the small excavator makes a partial turn during excavation work. This can stabilize the balance of the aircraft.

(3) A. When the driver uses the step, the step is extended to the side of the upper frame body and rotated. When the driver sits on the seat and places his or her feet on the step, the driver can assume an ergonomically reasonable seating posture. This not only reduces the fatigue of the driver's legs, but also allows the driver's weight to be sufficiently applied to the rear of the small excavator to maintain stability of the small excavator.

When the mouth and step are not in use, the step can be rotated to the side of the upper frame body and stored in a retracted state.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a partially cutaway side view of the essential parts of a small excavator 14 according to the present invention. In the figure, the same reference numerals are given to the same components as in the prior art. 15
16 is the lower structure of the small excavator 14, and 15 is the lower structure 15.
17 is a bracket fixed to the cylindrical portion 16, 18 is an upper frame body, 19 is a turning hole drilled in the lower part of the upper frame body 18, and 20 is a pivot hole in the upper frame body 18. The fixed bracket includes a swing bracket mounting portion 21, a swing cylinder 22, a stabilizer plate 23, and an arm for the stabilizer plate 24. FIG. 2 is a partially cutaway plan view of the main parts of the small excavator 14. In the figure, O is the axis of the cylindrical portion 16, that is, the center of rotation. FIG. 3 is a plan view of an embodiment of the small excavator 14.

FIG. 4 is a partially cutaway side view of the main part of the small excavator 14. In the figure, 25 and 26 are brackets provided on the upper frame body 18, 27 is a bracket provided on the arm 24, and 28 is a stabilizer cylinder. Fifth
The figure is a side view of the main part when the driver C is seated on the seat 5 of the small excavator 14. In the figure, two steps are provided on the sides of the upper frame body 18. Figure 6 shows a small excavator 1 with two steps on the left and right extended.
FIG. 4 is a plan view of main parts of No. 4.

Next, the configuration of the small excavator 14 according to the present invention will be described with reference to FIGS. 1 to 6. The lower structure body 15 and the upper frame body 18 are formed in a split shape, and the upper frame body 18
The lower structure 15 is configured to partially rotate via a rotation cylinder 22 which is an actuator. Also, a stabilizer plate 23 on which the driver rides and operates the vehicle.
was arranged at the rear of the upper frame body 18. In addition, two steps are provided on the sides of the upper frame body 18 so as to be rotatable in the left-right direction or vertical direction, and when the driver uses the two steps, the two steps are extended to the sides of the upper frame body 18 and can be rotated. the upper frame body 18 when not in use.
It is configured so that it can be rotated and stored on the side.

Next, the functions of the small excavator 14 according to the present invention will be described. Cylindrical portion 1 erected on the upper part of the lower structure 15
6 is rotatably fitted into one pivot hole at the bottom of the upper frame body 18. Further, a swing cylinder 22 is attached between the bracket 2o of the upper frame body 18 and the bracket 17 fixed to the cylindrical portion 16 of the lower structure body 15. Therefore, when the rotation cylinder 22 is expanded or contracted, the upper frame body 18 is moved at an angle α and an angle α' to the right and left, respectively, with respect to the lower structure 15 as shown in FIG.
Therefore, the cylindrical portion 16 of the lower structure 15 can be partially rotated about the axis O of the cylindrical portion 16 as the rotation center. Therefore, as shown in FIG. 3, the upper frame body 18 (the center of the upper frame body 18 in the front-rear direction is 5o-3o") is moved to the right of the lower structure 15 (the center of the lower structure 15 in the front-rear direction is Po Po'). At the same time, the swing cylinder 8 is rotated by an angle β, and the center QoQo' of the work attachment 10 is adjusted.
are the centers p, -p of the lower structure 15. ' parallel to '. This operation moves the work attachment 10 to the lower structure 15.
Since the excavator 14 can be offset relative to the excavator 14, the small excavator 14 can be provided with a side excavation function. Therefore, for example, when excavating in a path where there are obstacles such as utility poles, the work attachment 10 can be operated along the block wall to excavate at a position close to the block wall. Next, this small excavator 14, which can partially rotate, has a front part (
A work attachment 10 is attached to the front part). A stabilizer plate 23 is provided at the rear of the upper frame body 18 on which the driver rides and operates the vehicle as a counterweight. Therefore, when the small excavator 14 makes a partial turn during excavation work, the balance of the machine body can be stabilized in response to the load in the longitudinal direction.

By expanding and contracting the stabilizer cylinder 28, the stabilizer plate 23 can be moved in the direction of arrow 2 in FIG.
It can also be lowered to function as an outrigger. Next, step 29 is attached to the side of the upper frame body 18.
Therefore, when the driver uses the steps 29, the two steps are extended to the sides of the upper frame body 18 and rotated. With the driver seated in seat 5, proceed to step 2 above.
By placing your feet on 9, you can take an ergonomically reasonable sitting posture as shown in Figure 5. Not only is the fatigue of the driver's legs reduced, but the driver's weight can be sufficiently applied to the rear of the small excavator 14 to maintain stability of the small excavator 14. When the step 29 is not used, the step 29 can be rotated to the side of the upper frame body 18 and stored in a retracted state.

FIG. 7 shows another embodiment of a small excavator 1 according to the present invention.
4' is a partially cutaway side view of essential parts.

In the figure, parts that are the same as those included in the small excavator 14 are given the same reference numerals. 15' is a small excavator 14
16' is the cylindrical part of the lower structure 15',
30 is a vertical gear shaft fixed to the top plate 31 of the cylindrical part at 16°, a gear of a 32-vertical gear shaft, 18° is an upper frame body,
20' is a swing cylinder mounting bracket provided on the upper frame body 18', and 33 is a swing cylinder. FIG. 8 is a partially cutaway plan view of essential parts of the small excavator 14'.

In the figure, 34 is a rack connected to the piston rod of the swing cylinder 33 and meshed with the gear 32 of the vertical gear shaft 3o, and 35 is a rack guide that guides the sliding movement of the rack 34. Next, other embodiments of the small excavator 14
7 and 8, the configuration and function of .degree. will be described. The lower structure 15' and the upper frame 18' are formed in a split form, and the upper frame 18' is connected to the lower structure 1.
It is rotatably connected to the upper side of 5. and lower structure 15
A vertical gear shaft 30 is erected on the top plate 31 of the frame 18', and a rack 34 is disposed on the upper frame body 18' so as to mesh with the gear 32 of the vertical gear shaft 30.

A swing cylinder 33 is connected to the rack 34, and the rack 34 is slid along a rack guide 35 by expanding and contracting the swing cylinder 33. Rack 34
Since the gears 32 of the vertical gear shaft 30 are meshed,
When the rack 34 is slid by the rotation cylinder 33,
The upper frame body 18' is rotated within the meshing range of the rack 34 and the gear 32 with respect to the lower structure body 15'. Therefore, as shown in FIG. 8, the upper frame body 18'' can be partially rotated by angles α and α° in the right and left directions with respect to the lower structure 15. Swivel cylinder 33 as
However, other actuators, such as a hydraulic motor (not shown), may be provided to slide the rack 34.

Effects of the Invention In the conventional small excavator, the upper frame body and the lower structure are constructed as an integrated body, so it is possible to perform side excavation with the centers (lines) of the machine body and the work attachment parallel to each other. could not.

However, in the small excavator according to the present invention, the lower structure and the upper frame are formed in a split form, and the upper frame is partially rotated with respect to the lower structure via an actuator. By adjusting the swing cylinder, the center of the work attachment can be made parallel to the center of the lower structure. That is, since the work attachment can be offset with respect to the lower structure, the small excavator can be equipped with a side excavation function.

Further, at the rear of the upper frame body of the small excavator of this invention,
A stabilizer plate is provided for the operator to ride on and operate the machine instead of using a counterweight, so it is possible to stabilize the balance of the machine in response to the load in the longitudinal direction when the small excavator makes a partial turn during excavation work. can.

Further, in the small excavator of the present invention, a step is rotatably provided on the side of the upper frame body. Therefore, when the step is extended laterally and rotated, and the driver sits on the seat and places his/her feet on the step, an ergonomically rational seating position can be assumed.

This not only reduces the fatigue of the driver's legs, but also allows the driver's weight to be sufficiently applied to the rear of the small excavator to maintain stability of the small excavator.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view of the main part of a small excavator according to the present invention, Fig. 2 is a partially cutaway plan view of the main part of the small excavator according to the invention, and Fig. 3 is a small excavator according to the invention. FIG. 4 is a partially cutaway side view of the main parts of the small excavator of the present invention, and FIG. 5 is a side view of the main parts when the driver is seated on the seat of the small excavator of the present invention. Figure 6 is a plan view of the main parts of a small excavator with the left and right steps extended, and Fig. 7 is a side view of the main parts of a small excavator according to another embodiment of the present invention. 8 is a partially cutaway plan view of the main part of FIG. 7, FIG. 9 is a side view of a conventional small excavator, FIG. 10 is a front view of the small excavator shown in FIG. 9, and FIG. FIG. 12 is a plan view of the small excavator shown in FIG. 1, and FIG. 12 is a side view of the conventional small excavator. 1.14.14"-111111 Small Excavator 2) 1
5. 15 ----One lower structure 3.18.18 -
---------1 Upper frame body 5 seats 6.23 Stabilizer plate 10-----1------
---------One work atta 22, 23------
−−−−−−−1−−−2 rotating cylinders
Step swing cylinder swing bracket

Claims (3)

[Claims] (1) An upper frame body is provided on the upper side of the lower structure equipped with the traveling device, and the work attachment is attached to the front part of the upper frame body via a swing bracket, and the operator operates the machine from the rear side of the machine. In a small excavator that is designed to carry out various operations, the lower structure and the upper frame are formed in a split form, and the upper frame is configured to partially rotate relative to the lower structure via an actuator. A small excavator featuring: (2) A small excavator according to claim 1, characterized in that a stabilizer plate for riding and operating the excavator is disposed on the upper frame body. (3) An upper frame body is provided on the upper side of the lower structure equipped with the traveling device, and the work attachment is attached to the front part of the upper frame body via a swing bracket, and the operator can operate the machine from the rear side of the machine. In a small excavator that is designed to operate, a step is rotatably provided on the side of the upper frame body, and when the operator uses the step, the step extends out to the side of the upper frame body and rotates, and when not in use, the step is rotated. A small excavator characterized by being configured to be rotatably stored on the side of an upper frame body.