WO1995013240A1

WO1995013240A1 - Device for extending and storing horizontal boom

Info

Publication number: WO1995013240A1
Application number: PCT/JP1994/001876
Authority: WO
Inventors: Hiroyuki Sawabe; Shinichi Ohta
Original assignee: Komatsu Ltd.; Komatsu Mec Kabushiki Kaisha
Priority date: 1993-11-08
Filing date: 1994-11-08
Publication date: 1995-05-18
Also published as: JPH07125986A; TW298901U; CN1136798A; DE69427033D1; EP0728695B1; EP0728695A4; DE69427033T2; KR960705731A; JP3258472B2; KR100332941B1; CN1038574C; EP0728695A1

Abstract

The invention relates to a device for extending and storing a horizontal boom, said apparatus enabling turning of the horizontal boom to a side surface of a vertical boom for storing in parallel with the latter, and easy extending of the same. Therefore, pin bores (6) are formed in brackets (5) secured to a tip end of the vertical boom (2), brackets (11) are secured to a support frame (10) mounted to the horizontal boom (3), pin bores (12) are formed longitudinally of the brackets (11), the pin bores (6) and the pin bores (12) are turnably connected to each other by connection pins (14), and a turning drive device (16) is provided on a center line of the connection pins (14).

Description

Description Overhang of horizontal boom, storage device technology

The present invention relates to a horizontal boom overhang and storage device, and more particularly to a mobile crane horizontal boom overhang and storage device in which a horizontal boom is stored side by side on a vertical boom. Background technology

Conventionally, as a folding crane of a mobile crane, for example, the one shown in Japanese Utility Model Laid-Open No. 63-41092 is known. In this folding boom, a vertical boom is attached to the vehicle body so as to be vertically rotatable between a standing posture and a lying posture, and a horizontal boom is connected to the vertical boom so as to be vertically rotatable. This allows the vertical boom to fall down while traveling, and the horizontal boom to be stored in a folded position superimposed on the top of the vertical boom, and the vertical boom to be upright when crane work. It is designed to rotate.

However, such a folding boom has a problem that the horizontal boom overlaps the upper part of the vertical boom at the time of storage, so that the vertical dimension of the boom becomes large, and the visibility of the operator during traveling deteriorates.

To solve this problem, an unpublished Japanese Utility Model Application No. 4-091512 has been proposed. That is, the bracket provided in the width direction of the tip of the vertical boom has a pin hole in the longitudinal direction. In addition, the support frame with the horizontal boom mounted up and down is provided with a bracket in the width direction and a pin hole in the longitudinal direction, and the pin holes of the vertical boom and the support frame are connected with pins. are doing. Thus, the support frame can be rotated in the width direction of the vertical frame. When retracting, set the horizontal boom in the maximum lying position, then rotate the support frame by 180 ° to move the horizontal boom vertically. —They are stored in parallel on the side of the memory. Therefore, the upper and lower dimensions of the boom when retracted are reduced, and do not hinder the operator's view when traveling.

However, according to the above configuration, there is no power unit for extending or retracting the horizontal boom, and it has to rely on humans. As a result, extra work is required and there is danger. In addition, when the horizontal boom is in the retracted position, the winch wire between the vertical boom and the horizontal boom is bent into a U-shape, causing an unreasonable shape and causing damage. Disclosure of the invention

The present invention has been made in order to solve the drawbacks of the related art, and has as its object to provide a horizontal boom overhang and storage device that can be easily operated in a driver's seat and has no risk of damage to a wincher. I do.

The horizontal boom overhang and storage device according to the present invention includes horizontal boom overhang and storage means, and means for fixing the vertical boom and the horizontal boom, and can be controlled by a driver's seat. I do. The overhanging and storing means is such that a bracket is fixed to the end of the vertical boom in the width direction, a pin hole is provided in the longitudinal direction of the bracket, and the bracket is mounted in the width direction of the support frame on which the horizontal boom is freely undulated. A pin hole is provided in the longitudinal direction of the bracket of the support frame, and the pin hole of the vertical boom and the pin hole of the support frame are rotatably connected in the width direction by a connecting pin. A rotation drive device may be provided on the center line of the pin. The fixing means secures the brackets in the width direction of the tip of the vertical boom and in the width direction of the support frame, respectively, and when the horizontal boom extends, the brackets of the vertical boom and the support frame are fixed. A hydraulic cylinder having a connecting pin fitted into the pin hole may be provided on the center line of the pin hole so as to penetrate the pin hole at a position where the pin holes match. In addition, the fixing means fixes the connecting shaft to the support frame, and hooks to the vertical boom, which engage with the connecting shaft in the horizontal boom extending posture, and actuator for engaging and releasing the hook. May be provided. In addition, the winch is located at the tip of the vertical boom or at the Guides for wires may be provided. In this configuration, the gap between the winch wire sheave and the guide attached to the tip of the vertical boom, and the gap between the winch wire sheave and the guide attached to the base end of the horizontal boom. A wire guide may be provided between them. Further, a spring for adjusting the positions of the guide and the wire guide may be provided. Furthermore, the mounting position of the wire guide is such that, when the horizontal boom is in the extended position, the wire that is aligned with the vertical end of the vertical boom and the horizontal end of the horizontal boom is not in contact with the wire. The position may be as follows. Further, the overhanging and storing means are a hydraulic cylinder mounted on the support frame to raise and lower the vertical boom and the horizontal boom, and a hydraulic cylinder mounted on the tip of the vertical boom to translate the support frame in the width direction. A four-bar link and a hydraulic cylinder mounted on the tip of the vertical boom to operate the four-bar link may be provided.

With this configuration, control of various actuators such as a hydraulic cylinder can be performed in the driver's seat. That is, the operation of rotating the horizontal boom in the width direction of the vertical boom to extend the horizontal boom and the operation of fixing the vertical boom and the support frame in the extended posture can be performed in the driver's seat. In addition, since the guide sheave and the wire guide for the winch wire are provided and the position can be adjusted by a spring, the wire does not have an unreasonable shape when the horizontal boom is stored. And, in the horizontal boom overhanging posture, when the wires are aligned, the wire guides are attached at positions where they do not come into contact with the wires. Wear can be prevented. In addition, by installing the four-bar link and the hydraulic cylinder for operating the same, the horizontal boom can be moved in parallel when the horizontal boom is retracted, and the horizontal boom can be raised and lowered. This allows the horizontal boom to be placed side by side on the vertical boom and stored. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view of a wheeled crane in which a horizontal boom according to an embodiment of the present invention is stored on the side of a vertical boom, Fig. 2 is a right side view of the wheeled crane of Fig. 1,

Fig. 3 is a plan view of the front part of the wheeled crane of Fig. 1,

Fig. 4 is a side view of the horizontal boom overhang posture of the wheeled crane according to the embodiment, and Fig. 5 is a first embodiment of the horizontal boom overhang and storage device according to the embodiment. Perspective view of the connecting portion configuration,

6a and 6b are diagrams of the first embodiment of the fixing means according to the embodiment, FIG. 6a is an explanatory diagram when the hydraulic cylinder is extended, and FIG. 6b is an explanatory diagram when the hydraulic cylinder is contracted. ,

FIG. 7 is a side view of a second embodiment of the fixing means according to the embodiment,

FIG. 8 is a sectional view taken along the line A--A in FIG.

FIG. 9 is a detailed perspective view of the bracket of FIG. 7,

FIGS. 10a to 10c are diagrams of the operation of the second embodiment of the fixing means, FIG. 10a is an explanatory diagram when the horizontal boom is extended, and FIG. 10Ob is the connection between the vertical boom and the support frame. Explanatory diagram at the time of release, FIG. 10 c is an explanatory diagram at the time of opening the connecting shaft,

FIG. 11 is a plan view of the second embodiment of the overhang and storage device when the horizontal boom is overhanging according to the embodiment,

FIG. 12 is a plan view of the second embodiment of the storage device overhanging when the horizontal boom is retracted, FIG. 13 is a perspective view showing components of the second embodiment of the overhanging storage device,

FIG. 14 is a front view of the vertical and horizontal boom tips when the horizontal boom is retracted showing the third embodiment of the horizontal boom overhang and storage device according to the embodiment,

FIG. 15 is a front view of the vertical and horizontal boom tips when the horizontal boom is being extended and the horizontal boom is being extended according to the third embodiment of the storage device.

FIG. 16 is a front view of the vertical and horizontal boom tips when the horizontal boom is extended and the horizontal boom is extended according to the third embodiment of the storage device.

FIG. 17 is an explanatory diagram of a guide boom and a guide position adjusting spring of the third embodiment of the horizontal boom overhang and storage device. BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the horizontal boom overhang and storage device according to the present invention will be described below in detail with reference to the accompanying drawings.

Fig. 1 to Fig. 3 show the wheeled crane with the boom retracted. The vertical boom 2 attached to the main body 1 is raised and lowered, and the horizontal boom 3 is stored in parallel on the side. FIG. 4 shows a state in which the vertical boom 2 is erected and the horizontal boom 3 is extended, and the horizontal boom 3 is in the maximum lying posture.

FIG. 5 shows a first embodiment of the overhanging and storing device, in which a horizontal boom 3 and a hydraulic cylinder 4 for raising and lowering the horizontal boom are mounted on a support frame 10 so as to be able to raise and lower. A bracket 5 is fixed to the vertical boom 2 in the width direction, and a pin hole 6 is provided in one longitudinal direction and a pin hole 7 is provided in the other longitudinal direction. A bracket 11 is fixed to the supporting frame 10 in the width direction, and a pin hole 12 is provided in one longitudinal direction and a pin hole 13 is provided in the other longitudinal direction. The pin holes 6 on one side and the pin holes 12 are rotatably connected by connecting pins 14. Bracket 8 is fixed on the center line of pin hole 6 on one side of vertical boom 2, and bracket 15 is fastened on the center line of pin hole 12 on one side of support frame 10. And are connected via a rotation motor 16. The rotation motor 16 can be controlled from the driver's seat, and by driving the rotation motor 16, the support frame 10 rotates about the connecting pin 14 in the width direction of the vertical boom 2. It has become.

Next, a first embodiment of the means for fixing the vertical boom 2 and the horizontal boom 3 will be described. In FIGS. 5, 6a and 6b, the pin holes 7 on the other side of the vertical boom 2 and the pin holes 13 on the other side of the support frame 10 are mutually opposed when the horizontal boom 3 is in the extended position. The hydraulic cylinder 17 having the connecting pin 18 is mounted on the center line of the pin hole 7 of the vertical boom 2 at the position where it is aligned. The hydraulic cylinder 17 can be controlled from the driver's seat, and as shown in FIG. 6 a, by extending the hydraulic cylinder 17, the connecting pin 18 is connected to the pin hole 7 of the vertical boom 2. The support frame 10 is fixed to the vertical boom 2 with the support frame 10 in a protruding posture by penetrating and inserting into the pin holes 13 of the support frame 10. On the other hand, when the hydraulic cylinder 17 is shortened, as shown in FIG. The support frame 10 is released from the pin hole 13 of the support frame 10 and the support frame 10 is released.

The operation of the first embodiment of the fixing means will be described. When extending the boom in the stowed state as shown in Fig. 1 and Fig. 2, erect the vertical boom 2 and drive the rotation motor 16 from the driver's seat to move the support frame 10 to the vertical frame 2 Rotate in the width direction of, and make the overhang posture shown in Fig. 4. After the pin hole 7 of the vertical boom 2 and the pin hole 13 of the support frame 10 are aligned, extend the shortened hydraulic cylinder 17 to connect the connecting pin 18 to the pin holes 7 and 13. Insert and fix support frame 10 to vertical boom 2. When storing the horizontal boom 3 in the working state, the work may be performed in the reverse procedure.

7 to 10c show a second embodiment of the fixing means. The connecting shaft 21 is fixed to the support frame 10 by a bracket 20. A bracket 22 having a concave portion 23 is fixed to the vertical boom 2. The bracket 22 is provided with a receiving portion 25 having a notch 24. A rotor 30 is rotatably fitted in the recess 23 of the bracket 22. The rotor 30 is provided with a receiving portion 32 having a notch 31 and a lever 33. I have. The lever 33 and the vertical boom 2 are connected by a hydraulic cylinder 34 that can be controlled from the driver's seat, and the rotor 30 rotates by expanding and contracting the hydraulic cylinder 34. . When the horizontal boom 3 is in the overhanging posture, the receiving portion 25 of the bracket 22 and the receiving portion 32 of the rotor 30 are engaged with the connection rod 21.

The operation of the second embodiment of the fixing means having such a configuration will be described. When the horizontal boom 3 is in the overhanging posture, the connecting shaft 21 is fitted into the receiving portion 25 of the bracket 22 and the receiving portion 32 of the rotor 30 as shown in FIG. 10a. As a result, the hydraulic cylinder 34 (see FIG. 7) is extended, the rotor 30 is rotated, and the notch 31 and the bracket notch 24 are staggered to fix the connecting shaft 21. And connect support frame 10 to vertical boom 2. To release the connection between the vertical boom 2 and the supporting frame 10, shorten the hydraulic cylinder 34 and lower it as shown in Figure 10b. Rotate evening 30 in the direction of the arrow so that notch 24 of bracket 22 and notch 31 of mouth 30 coincide. Next, as shown in FIG. 10c, the connecting shaft 21 is released from the bracket 22 and the rotor 30.

FIGS. 11 to 13 show a second embodiment of the horizontal boom overhang and storage device. Brackets 40 and 41 are fixed to the end of the vertical boom 2 in the width direction. One side of the bracket 40 and the bracket 41 are provided with pin holes 42 and 43 penetrating therethrough, and the other side of the bracket 40 is provided with a pin hole 44. The horizontal boom 3 and the hydraulic cylinder 4 for the horizontal boom are mounted on the support frame 50 so as to be able to move up and down by pins 51 and 52, and the support frame 50 is provided with pin holes 53 for connection, and 54 and 55 are provided. The pin holes 4 2 and 4 3 of the vertical boom 2 and the pin holes 53 of the support frame 50 are connected by pins 45 and 56 via the first link 60 having pin holes 61 at both ends. The pin hole 4 of the vertical boom 2 and the pin hole 54 of the support frame 50 are connected via a second link 62 having pin holes 63 at both ends, as shown in FIG. Thus, a parallel 4-bar link is configured.

In addition, a bracket 64 having a pin hole 65 is provided on the side surface of the first link 60, and the pin hole 55 of the support frame 50 and the pin hole 6 of the first link 60 are provided. 5 is connected to a pin 6 via a hydraulic cylinder 66. Thus, by extending and contracting the hydraulic cylinder 66, the horizontal boom 3 is moved in parallel in the width direction via the parallel 4-bar link.

The operation of this configuration will be described. When the hydraulic cylinder 66 is extended, the vertical boom 2 and the horizontal boom 3 are arranged in a straight line as shown in FIG. 11, and the horizontal boom 3 is in an overhanging posture. When the hydraulic cylinder 66 is shortened, the support frame 50 moves in the width direction as shown in Fig. 12 and is arranged in parallel on the side of the vertical boom 2 by bringing the horizontal boom 3 into the down state. , And the storage position.

Next, a third embodiment of the horizontal boom extension and storage device will be described with reference to FIGS. In Fig. 14, 70 and 71 are sheaves for the winch wire attached to the: 'section of the vertical boom 2, and 72 and 73 are bases of the horizontal boom 3. Sheave attached to the end. Wires 74 and 75 pass through the sheaves 70 and 72 and the sheaves 71 and 73, respectively. The bracket 5 at the tip of the vertical boom 2 and the support frame 10 of the horizontal boom 3 are connected with the hole 6 as the center of rotation. A guide sheave 80 is provided on the extension of the center line of the hole 6 so that when the horizontal boom 3 is in the retracted position, the guides of the wires 74 and 75 which become U-shaped are provided. . A guide 81 is provided between the guide sheave 80 and the sheaves 70 and 71, and a guide 8 is provided between the guide sheave 80 and the sheaves 72 and 73. 2 is provided to guide the wires 74 and 75 from being subjected to excessive bending force. The guide sheave 80 need not rotate, and may be a member for guiding the wire. FIG. 15 shows a state in which the horizontal boom 3 is being shifted from the retracted position to the extended position, and FIG. 16 shows a case in which the horizontal boom 3 is in the extended position. As shown in FIG. 16, guides 81 and 82 are driven by wires 74, 75, between sheave 70 and sheave 72, and between sheave 71 and sheave 7. The wire is placed so that it does not touch the wires 74 and 75 when it is linear with the wire 3, preventing sliding wear. Therefore, there is no danger of shortening the life of wires 74 and 75.

In FIG. 17, a guide sheave 80 and a guide 81 are provided with a position adjusting spring. A lever 83 for swingably mounting the guide sheave 80 is urged by a spring 84. Also, a lever 85 for swingably mounting the guide 81 is urged by a spring 86. When a large force is applied to the wire by the springs 84, 86, the respective positions are automatically adjusted. Industrial applicability

According to the present invention, the horizontal boom can be extended, stored and fixed in a safe and easy manner by controlling the actuator in the driver's seat, and wire abrasion can be prevented. Due to the ups and downs, it can be easily stored and extended in parallel to the side of the vertical boom, and is useful as a horizontal boom overhang and storage device.

Claims

The scope of the claims

1. A movable crane in which a horizontal boom is freely mounted on an end of a vertical boom that can be raised and lowered, and the horizontal boom is stored in parallel on a side surface of the vertical boom. An extension and storage device for a horizontal boom, comprising: a vertical boom and a fixing means for fixing the horizontal boom, wherein the horizontal boom can be controlled from a driver's seat.

2. The overhanging and storing means secures a bracket in the width direction at the tip of the vertical boom, provides a pin hole in the longitudinal direction of the bracket, and the width of the support frame on which the horizontal boom is mounted so as to be able to move up and down. The support frame is fixed in the direction, a pin hole is provided in the longitudinal direction of the bracket of the support frame, and the pin hole of the vertical boom and the pin hole of the support frame are rotatable in the width direction by a connecting pin. The horizontal boom overhang and storage device according to claim 1, wherein a rotation drive device is disposed on a center line of the connection pin.

3. The fixing means fixes the brackets in the width direction of the tip of the vertical boom and in the width direction of the support frame, respectively, and in the overhang posture of the horizontal boom, the bracket of the vertical boom and the support frame 2. A hydraulic cylinder having a pin through a pin hole at a position where the bracket is aligned with the bracket, and a hydraulic cylinder having a connecting pin fitted into the pin hole on a center line of the pin hole. Or the horizontal boom overhang or containment device as described in either.

4. The fixing means fixes a connecting shaft to the support frame, and engages and releases the hook engaging with the connecting shaft in the horizontal boom extending posture with the vertical boom. The horizontal boom overhang and storage device according to any one of claims 1 and 2, characterized in that the storage device includes an actuator.

5. The horizontal boom overhang and storage device according to claim 2, wherein a guide for a winch wire is provided at a distal end of the vertical boom or a proximal end of the horizontal boom.

6. Between the winch wire sheave mounted on the distal end of the vertical boom and the guide, and the winch wire sheave and the guide mounted on the proximal end of the horizontal boom. 6. The horizontal boom overhang and storage device according to claim 5, wherein a wire guide is provided between the horizontal booms.

7. The overhanging and storing device for a horizontal boom according to claim 6, further comprising a spring for adjusting positions of the guide and the wire guide.

8. The mounting position of the wire guide is such that, in the protruding posture of the horizontal boom, the wire that is in a straight line between the sheave at the tip of the vertical boom and the sheave at the base end of the horizontal boom, The horizontal boom extension and storage device according to any one of claims 6 and 7, wherein the storage device is located at a predetermined position.

9. The overhanging and storing means is a hydraulic cylinder mounted on a support frame for raising and lowering the vertical boom and the horizontal boom, and a hydraulic cylinder mounted on a distal end of the vertical boom to move the support frame in a width direction. 2. The horizontal boom according to claim 1, further comprising: a four-bar link that translates in parallel with the hydraulic cylinder, and a hydraulic cylinder that is attached to a tip of the vertical boom and operates the four-bar link. Overhanging, containment.