JPH09249382A - Driver's cab travelling device for self-running type crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable sliding in the forward and backward directions and tilting of a driver's cab of a self-running type crane by one operation cylinder. SOLUTION: A guide rail 4 is mounted on a turn frame 2 of a self-running type crane by a four link link device constituted by a first link 11 and a second link 13 in such a manner that it can rise and fall freely. A rail 5 which is engaged with the guide rail 4 and can slide in the forward and backward directions is provided to fix a driver's cab on the rail 5. The turn frame 2 and a tip of the rail 5 are connected mutually by a cylinder 8. When the cylinder 8 is elongated, the driver's cab slides forward and moves to improve the field of vision when the crane travels. When the cylinder 8 is shortened, the driver's cab moves backward and tilts upward by the action of the four link link to improve the field of vision when the crane is operated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for sliding and tilting a driver's cab of a self-propelled crane in the front-rear direction.

[0002]

2. Description of the Related Art Many self-propelled crane operating rooms are designed to carry out a traveling operation and a work operation in a single operating room. This driver's cab is located at the center in the front-rear direction of the vehicle in order to secure the field of view during work, and therefore the forward field of view during traveling is not good. As a countermeasure, for example, a slant boom is adopted as proposed in Japanese Examined Patent Publication No. 3-69832, or a boom undulation cylinder mounting bracket is miniaturized as proposed in Japanese Utility Model Publication No. 3-38231. There are things that try to secure a forward view from. In addition, there are reclining seats for improving the upper visibility at the time of work and adjusting work implement operating levers for improving operability.

However, although the above-mentioned proposal improves the visibility during running, the viewpoint from the driver's cab does not change, and therefore there is a problem that the front underbody and the lower left of the vehicle body remain as dead zones. Regarding the field of view during work, the above proposal has a problem that it is difficult to visually recognize the display on the front panel.

As an example of measures against the above-mentioned problems in the field of view during traveling, as a practical measure, the 59-105285 is used.
Have been proposed in. Further, as an example of measures against the problem of the field of view during work, there is one proposed in Japanese Utility Model Laid-Open No. 5-69080.

In Japanese Utility Model Laid-Open No. 59-105283, as shown in FIG. 14, a swing frame 51 mounted on a lower traveling body 50 of a self-propelled crane is provided with a boom 52 so that it can be raised and lowered. A driver's cab 53 is attached to the swivel frame 51 so as to be movable in the front-rear direction.
Are connected by a cylinder 54, and the cab 53 is moved back and forth by expanding and contracting the cylinder 54. That is, when traveling, the cylinder 54 is extended,
The driver's cab 53 is moved to the vehicle front position shown by the thin double-dashed line in FIG. 14 to improve the front and side visibility, and the cylinder 54 is shortened during work to position the driver's cab 53 at the center of the vehicle shown by the solid line. , The visibility during crane work is improved.

As shown in FIG. 15, an actual Kaihei 5-69080 is an elevation angle adjusting device which supports a driver's cab 61 on a vehicle body 60 in the same direction as that of a boom 62 so that the operator's cab 61 can be raised and lowered. 63 is provided. And boom 6
2 when standing up and carrying out crane work.
The elevation angle adjusting device 63 is actuated in response to the undulating motion of 1 to tilt the cab 61 upward by α. According to this, the upward field of view during work is improved, and the visibility of the display on the front panel is not a problem.

[0007]

As described above, in a self-propelled crane, in order to improve the visibility, the cab is moved to the front of the vehicle body while traveling, and the boom is erected in the center of the vehicle body during crane work. It is desirable to tilt upward in the direction. However, in the above configuration, the sliding and tilting of the cab in the front-rear direction are operated by different devices, and it is not possible to slide or tilt the cab as needed in the same vehicle. Can not.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a driver's cab moving device for a self-propelled crane that can slide or tilt the driver's cab as necessary. Has an aim.

[0009]

In order to achieve the above object, in a driver's cab moving device for a self-propelled crane according to the present invention, a traveling operation and a work operation are performed in one operator's cab, and In a self-propelled crane that includes a slide mechanism that slides the operator's cab in the front-back direction and a tilt mechanism that tilts the operator's cab upward in the standing direction of the boom of the crane, a slide mechanism that slides the operator's cab in the front-rear direction. , A tilt mechanism for tilting the operator's cab upward in the raising direction of the boom of the crane, a cylinder for operating the slide mechanism and the tilt mechanism, and the slide mechanism when the cylinder is shortened to a predetermined length. It is configured to include a stopper for locking.

The slide mechanism is fixed to the driver's cab and is movable in the front-rear direction together with the driver's cab.
A guide rail that engages with the rail and serves as a guide when the cab and the rail are moved is provided, and the tilt mechanism is provided with a four-bar link that tiltably supports the guide rail on the vehicle body. .

Alternatively, the slide mechanism is fixed to a driver's cab and is movable in the front-rear direction together with the driver's cab, and a guide rail which engages with the rail and serves as a guide when the driver's cab and the rail are moved. The tilt mechanism is configured such that one end of the guide rail is rotatably attached to the vehicle body.

A sliding direction locking means is provided between the rail and the guide rail.

Further, a vertical locking means is provided between the guide rail and the vehicle body.

Further, between the rail and the guide rail,
The sliding direction locking means is provided, and the vertical locking means is provided between the guide rail and the vehicle body.

[0015]

With the above-mentioned structure, the operator's cab can be slid in the front-back direction by expanding and contracting one cylinder. The cylinder is shortened to a predetermined length and the slide mechanism is stopped by the stopper. After locking, the driver's cab can be tilted upward by further shortening. Further, since the sliding direction locking means is provided between the rail and the guide rail and the vertical locking means is provided between the guide rail and the vehicle body, the position of the cab is fixed at a predetermined position and stabilized. be able to.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a cab moving device for a self-propelled crane according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a side view of a self-propelled crane equipped with a first embodiment of a cab moving device according to the present invention. A boom 3 is movably mounted on a revolving frame 2 mounted on the lower traveling structure 1. A guide rail 4 is arranged in the center of the revolving frame 2, and a driver's cab 6 is provided on the guide rail 4.
A rail 5 fixed to the guide rail 4 is slidably mounted along the guide rail 4. A stopper 7 is provided at a rear end portion of the guide rail 4 and comes into contact with the rail 5 when the rail 5 is retracted by a predetermined amount. The swivel frame 2 and the tip of the rail 5 are
The cylinders 8 are connected to each other on the side of the operator's cab 6, and the operator's cab 6 is slid back and forth together with the rail 5 by expanding and contracting the cylinder 8. This figure shows a case where the cylinder 8 is extended and the cab 5 is moved forward.

FIG. 2 is a detailed plan view of the first embodiment of the cab moving apparatus, FIG. 3 is a view taken along the line AA of FIG. 2, and a detailed side view of the first embodiment of the cab moving apparatus. Is. As shown in the figure, a pair of left and right brackets 10a, 10a are fixedly installed at the rear of the revolving frame 2, and the brackets 10a, 10a
One end of each of the short first links 11 and 11 is rotatably attached to a by pins 12 and 12, and the other ends are connected to the rear portion of the guide rail 4. Further, a pair of left and right brackets 10b, 10b are fixedly mounted on the front portion of the revolving frame 2, and one ends of long second links 13, 13 are rotatably attached to the brackets 10b, 10b by pins 14, 14, respectively. The other end is connected to the front part of the guide rail 4 to form a four-bar link.

FIG. 4 is a view taken along the line BB in FIG. 3 and shows the engaged state of the guide rail 4 and the rail 5. That is, a pair of left and right guide rails 4, 4 formed in a U shape.
A plurality of upper and lower guide rollers 15 are attached to the inside of the upper and lower guide rollers 15, and a lower flange of a pair of left and right rails 5 and 5 formed in a C shape is provided between the upper and lower guide rollers 15 and 15. It is inserted and supported slidably in the front-back direction.

FIG. 5 is a view taken along the line CC of FIG. 3, showing the first lock cylinder. A pair of first lock cylinders 20, 20 are fixedly mounted on the revolving frame 2, and when the cylinder rod 21 is extended, the first lock cylinders 20 and 20 are fitted into the holes 17 of the boss 16 provided on the guide rail 4, and the vertical direction of the guide rail 4 is increased. It is designed to lock movement. The right side of the figure shows the locked state, and the left side shows the unlocked state.

FIG. 6 is a view taken in the direction of arrows D--D in FIG. 3, showing the second lock cylinder. The bracket 18 provided outside the guide rail 4 has a second lock cylinder 22
Is fixed. A boss 24 having a hole 25 is provided on the rear side surface of the rail 5, and when the cylinder rod 23 of the second lock cylinder 22 is extended at the position where the rail 5 has moved forward as shown in FIG. Insert
The movement of the rail 5 in the front-rear direction is locked.

Further, as shown in FIG. 7 which is a sectional view taken along line EE of FIG. 3, a boss 26 having a hole 27 is provided on the front side surface of the rail 5, so that the rail 5 moves rearward, At the position where it abuts on the stopper 7, the rod 23 of the second lock cylinder 22 is fitted into the hole 27 of the boss 26 to lock the rail 5 at that position.

The operation of the cab moving device will be described below. When traveling, the guide rail 4 is locked to the revolving frame 2 by the first lock cylinder 20, the cylinder 8 is extended, and the rail 5, that is, the cab 6 is moved forward, as shown in FIG. After reaching the predetermined position, the boss 2 at the rear portion of the rail 5 is moved by the second lock cylinder 22.
The rod 23 is fitted into the hole 25 of 4 and the rail 5 is locked. In this state, the front suspension around the vehicle body and the side view are good, and the movement can be performed safely and quickly.

When carrying out the work, the second lock cylinder 22 is shortened to unlock the boss 24 at the rear portion of the rail 5, and the cylinder 8 is shortened to move the cab 6 rearward. As shown in FIG. 8, when the cab 6 is retracted to a predetermined position, the rear end of the rail 5 contacts the stopper 7, and at this position, the second lock cylinder 22 moves the rod 23 into the hole 27 of the boss 26 in front of the rail 5. And fix the cab 6 in that position.

When carrying out a crane operation with the boom 3 standing upright, the guide rail 4 by the first lock cylinder 20 is used.
When the vertical lock is released and the cylinder 8 is further shortened, moments about the pins 12 and 14 are generated in the first link 11 and the second link 13, respectively. Therefore, as shown in FIG. 9, the guide rail 4 tilts upward due to the action of the four-bar link formed by the first link 11 and the second link 13. That is, the operator's cab 6 faces upward, and the visibility during crane work is improved.

FIG. 10 is a side view of a self-propelled crane showing a second embodiment of the cab moving device. The guide rail 4a has a bracket 3 whose base end is fixed to the revolving frame 2.
It is rotatably attached to the first pin 32. In addition,
Since the configuration other than the above is the same as that of the first embodiment, the description thereof will be omitted. When the cylinder 8 is shortened during crane work, the guide frame 4a rotates about the pin 32, and the cab 6 tilts upward as shown in FIG.

FIG. 11 is a plan view of the cab 6 portion showing a third embodiment of the cab moving device, and FIG. 12 is a view of F- of FIG.
It is a side sectional view which is an arrow F view, and the cab 6 has shown the state which moved to the front.

As shown in FIG. 11, the cylinder 8a is located at the center of the guide rails 4 and 5 in the left-right direction and is located in the cab 6
The base end portion of the rail 5 is rotatably attached to a bracket 33 fixed to the revolving frame 2 by a pin 34, and its tip end is connected to the tip end of the rail 5. . The guide rail 4 is connected to the revolving frame 2 by the first link 11 and the second link 13 as in the first embodiment. As shown in FIG. 12, the center line XX of the cylinder 8 a is the bracket 10 fixed to the revolving frame 2.
It is located above the center of the pin 12 that connects the first link 11 to a and the pin 14 that connects the second link 13 to the bracket 10b fixed to the revolving frame 2. Since the configuration other than the above is the same as that of the first embodiment, the description thereof will be omitted.

When performing a crane operation, the cylinder 8a is shortened. As described above, the center line of the cylinder 8a is located above the centers of the pins 12 and 14 that connect the base end portions of the first link 11 and the second link 13, so that the first link 11 and the second link Moments are generated in the links 13 about the pins 12 and 14, respectively, and the guide rails 4 and 5 are tilted upward together with the cab 6 as shown in FIG.

[0030]

The cab moving device for the self-propelled crane according to the present invention has the above-described structure, and therefore has the following effects. (1) When the vehicle is traveling, the driver's cab is moved forward to ensure the front suspension and side view of the vehicle body, enabling safe and quick movement. (2) By tilting the operator's cab upward during crane work, it is possible to take an optimum operation posture for checking the boom condition when the boom is raised and lowered, and the operator's burden can be reduced. (3) By moving the cab back and forth, it is easy to inspect and maintain the lower surface of the cab and the periphery of the revolving frame.

[Brief description of drawings]

FIG. 1 is a side view of a self-propelled crane equipped with a first embodiment of a cab moving device of the present invention (a state in which a cab is moved forward).

FIG. 2 is a plan view of FIG.

FIG. 3 is a detailed side sectional view of FIG.

FIG. 4 is a view showing an engaged state between the guide rail and the rail of FIG.

5 is a drawing of the first locking device of FIG. 1. FIG.

6 is a drawing of the second locking device of FIG. 1. FIG.

7 is a cross-sectional view of a boss provided at the tip of the rail of FIG.

FIG. 8 is a side view of the self-propelled crane showing a state in which the cab of FIG. 1 is located in the center of the vehicle body.

FIG. 9 is a side view of the self-propelled crane showing a state when the operator's cab of FIG. 1 is tilted upward.

FIG. 10 is a side view of the self-propelled crane equipped with the second embodiment of the cab moving device of the present invention (the cab is tilted upward).

FIG. 11 is a detailed plan view of a third embodiment of the cab moving device of the present invention.

FIG. 12 is a detailed side sectional view of FIG.

FIG. 13 is a side view of a self-propelled crane equipped with a third embodiment of a driver's cab moving device of the present invention (state in which the driver's cab is tilted upward).

FIG. 14 is a view showing a first conventional technique and is a side view of a self-propelled crane equipped with an operator cab front-rear moving device.

FIG. 15 is a diagram showing a second conventional technique, and is an explanatory diagram of a driver's cab tilt device of a crane.

[Explanation of symbols]

2 ... Revolving frame, 4 ... Guide rail, 5 ... Rail, 6
... Operator's cab, 7 ... Stopper, 8, 8a ... Cylinder, 10
a, 10b, 33 ... Bracket, 11 ... First link, 1
3 ... 2nd link, 15 ... Guide roller, 20 ... 1st lock cylinder, 22 ... 2nd lock cylinder.

Claims (6)

[Claims] 1. A slide mechanism for performing a traveling operation and a work operation in one cab and sliding the cab forward and backward, and a tilt mechanism for tilting the cab upward in a rising direction of a boom of a crane. In a self-propelled crane equipped with, a slide mechanism that slides the cab in the front-rear direction, a tilt mechanism that tilts the cab upward in the rising direction of the boom of the crane, and a single piece that operates the slide mechanism and the tilt mechanism. And a stopper that locks the slide mechanism when the cylinder is shortened to a predetermined length, the cab moving device for a self-propelled crane. 2. The driver's cab moving device for a self-propelled crane according to claim 1, wherein the slide mechanism is fixed to the driver's cab and is movable in the front-rear direction together with the driver's cab, and the rail is engaged with the rail. A self-propelled type that is provided with a guide rail that serves as a guide when the cab and the rail are moved, and the tilt mechanism includes a four-bar link that supports the guide rail on the vehicle body in a tiltable manner. Crane cab moving device. 3. A driver's cab moving device for a self-propelled crane according to claim 1, wherein the slide mechanism is fixed to the driver's cab and is movable in the front-rear direction together with the driver's cab, and is engaged with the rail. However, the tilt mechanism includes a guide rail that serves as a guide when the cab and the rail are moved, and the tilt mechanism is configured such that one end of the guide rail is rotatably attached to a vehicle body. -Type crane cab moving device. 4. The cab moving device for a self-propelled crane according to any one of claims 1, 2 and 3, wherein a locking device for sliding direction is provided between the rail and the guide rail. Crane cab moving device. 5. The cab moving device for a self-propelled crane according to any one of claims 1, 2 and 3, further comprising a vertical locking means provided between the guide rail and the vehicle body. Crane cab moving device. 6. A driver's cab moving device for a self-propelled crane according to claim 1, 2 or 3, wherein a sliding direction locking means is provided between the rail and the guide rail, and between the guide rail and the vehicle body. A driver's cab moving device for a self-propelled crane, which is provided with vertical locking means.