JP2012250783A - Truck crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a truck crane that moves more safely.SOLUTION: The truck crane 1 includes: a first frame 10 having a first axle 13 with wheels 3a disposed on the right and left sides, and a freely raising/lowering telescopic boom 11; and a second frame 20 having a second axle 23 with wheels 3b disposed on the right and left sides, and a cab 21. The first frame 10 and second frame 20 are connected so as to be relatively bendable with respect to the left and right directions around a vertically provided articulate pin. A seat 25 provided in the cab 21 can be turned toward the first frame 10 and its opposite side. When the front face of the seat 25 faces the first frame 10, traveling operation and crane operation are available. When the front face of the seat 25 faces the opposite side of the first frame 10, only the traveling operation is available.

Description

  The present invention relates to a crane vehicle, and more particularly to a crane vehicle that can move while hanging a load.

  Conventionally, as shown in FIG. 3, a front frame 910 having a front axle 913 with wheels 93a on the left and right, a telescopic boom 911 with hooks suspended at the tip, and a rear axle 923 with wheels 93b on the left and right, A pick and carry crane 900 including a rear frame 920 having a cab 921 for traveling and crane operation is known. In the illustrated example, a hoisting cylinder 917 is provided between the front axle 913 and the telescopic boom 911, whereby the telescopic boom 911 can be hoisted freely. In such a pick-and-carry crane 900, the driver's seat 925 is fixedly provided in the operator cab 921 toward the front side. Therefore, not only the crane operation but also a case where a certain amount of high-speed traveling operation is performed, for example, when traveling on a public road or the like, the crane device (the telescopic boom 911) is arranged in front of the driver. Therefore, the field of view was not always good. Further, the distance from the driver's cab to the front end of the vehicle (the tip of the telescopic boom 911 in this conventional example) is long, and the driver's skill is required for traveling operation.

  Therefore, for example, Patent Document 1 discloses a lift that moves a wheel loaded on a pair of axles and a container mounted on the transport vehicle and placed on the ground surface toward a predetermined container base provided on the transport vehicle. The transport vehicle between the container and the wheel closest to the container so that the device and one end of the transport vehicle adjacent to the container are secured to the ground surface where the container is moved up and positioned in the transport position relative to the transport vehicle. A container transport vehicle having a device for vertically moving one end portion of the transport vehicle is provided with a structure in which a housing for a drive motor including a drive wheel can be turned around a support shaft together with an operation place of a driver's cab. It is disclosed. Certainly, according to such a transport vehicle, by turning the drive motor housing, the forward direction of the transport vehicle can be reversed forward and backward, so that it is expected to improve operability in traveling. .

Japanese Patent Publication No. 1-24651

  However, the turning operation of the housing for the drive motor in the transport vehicle as disclosed in Patent Document 1 is a large scale, and furthermore, the drive wheels may be unstable because they are orthogonal to the front-rear direction during the turning operation. is there.

  Then, this invention is made | formed in view of the situation mentioned above, and it aims at providing the crane vehicle which can move more safely by solving at least one among the said subjects. To do.

  In order to solve the above-mentioned problem, in the invention according to claim 1, a first frame having a first axle having wheels on the left and right sides and a telescopic boom provided in a undulating manner, and a first frame having wheels on the left and right. A second frame having two axles and a driver's cab, wherein the first frame and the second frame can be bent relative to the left and right directions around an articulate pin provided in the vertical direction. A connected crane vehicle, wherein a seat provided in the cab can be reversed in two directions, the first frame side and the opposite side, and the front side of the seat faces the first frame side. When facing, traveling operation and crane operation are possible, and when the front of the seat faces the opposite side of the first frame side, only traveling operation is possible. .

  In the invention according to claim 2, a first operation part for performing a traveling operation and a crane operation is provided on the first frame side in the cab, and on the opposite side of the first frame side. A second operation unit for performing a traveling operation is provided, and the first operation unit can be operated only when the front of the seat faces the first frame side, and the second operation unit The section can be operated only when the front of the seat faces the opposite side of the first frame.

  According to a third aspect of the present invention, the hoisting fulcrum of the telescopic boom is arranged substantially immediately above the articulate pin.

  According to the first and second aspects of the invention, the forward direction can be changed simply by reversing the seat without performing a large-scale operation such as reversing the drive wheel (drive motor housing). be able to. In addition, when the direction opposite to the crane is set to the forward direction, the crane operation is limited, so there is no malfunction.

  Further, according to the invention described in claim 3, for example, as compared with the case where the hoisting fulcrum of the telescopic boom is arranged shifted from the position of the articulate pin to the side opposite to the driver's cab, from the driver seat to the tip of the boom. , And the operability during operation when the crane side is in the forward direction is enhanced.

1 is a schematic side view of a crane truck according to an embodiment of the present invention. (A) It is a schematic diagram at the time of driving | running | working of the crane vehicle which concerns on one embodiment of this invention. (B) It is a schematic diagram at the time of driving | running | working of the crane vehicle which concerns on one embodiment of this invention. It is a side surface schematic diagram of the crane vehicle of a prior art example.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. In addition, the same code | symbol is attached | subjected about the same or equivalent component, and the description is abbreviate | omitted when description overlaps. As shown in FIG. 1, a crane 1 includes a first frame 10 having a first axle 13 having wheels 3a on the left and right sides, and a telescopic boom 11 for hanging a hook (not shown) on the tip, and wheels on the left and right. And a second frame 20 having a second axle 23 provided with 3b and a cab 21 for running and crane operation. The first frame 10 and the second frame 20 can be bent relative to the left and right directions around an articulate pin (rotation center 34 shown in FIG. 1) as a rotation axis provided in the vertical direction. It is connected to. For the sake of convenience, the following description will be made assuming that the first frame 10 side is “front” and the second frame 20 side is “rear” unless otherwise specified.

  The first frame 10 includes a first axle 13 on one end side (front side) and a connecting portion (articulate pin) with the second frame 20 on the other end side (rear side) (the left-right direction in FIG. 1). ), And an inclined portion 10b provided to be inclined from the upper end of the connecting portion of the lower frame 10a toward the other end side (first axle 13 side) of the lower frame 10a. It is prepared for. Accordingly, the first frame 10 is provided such that the lower frame 10a and the inclined portion 10b are integrated on the front side, and the lower frame 10a and the inclined portion 10b are vertically overlapped with a predetermined space on the rear side. In the illustrated example, the lower end of the inclined portion 10b is shifted from the position of the first axle 13 to the rear side (the second frame 20 side), so that it is between the first axle 13 and the inclined portion 10b. Predetermined intervals (spaces) are provided.

  A telescopic boom 11 configured in a multistage manner is pivotally supported at the upper end of the inclined portion 10b so as to be raised and lowered. In the illustrated example, the telescopic boom 11 is provided with a winch 12 around which a wire (not shown) is wound so as to protrude from the rear end, and the telescopic boom is wound and unwound by the winch 12. A hook (not shown) provided on the wire at the tip of 11 can be moved up and down. The telescopic boom 11 is provided with a hoisting cylinder 17 between a substantially intermediate position of the base end boom 11a pivotally supported by the inclined portion 10b and a predetermined position above the middle in the vertical direction of the inclined portion 10b. The entire telescopic boom 11 can be raised and lowered by extending and retracting the hoisting cylinder 17. In addition, by providing the hoisting cylinder 17 at a position on the upper side (the telescopic boom 11 side) of the inclined portion 10b, not only can a predetermined space be ensured on the front side of the inclined portion 10b, but the length of the hoisting cylinder 17 can be shortened. can do. Therefore, in the illustrated example, since the strength of the undulating cylinder 17 can be increased as compared with the case where a long cylinder is employed, only one undulating cylinder 17 is arranged. However, it goes without saying that the undulating cylinder 17 is not limited to one.

  The telescopic boom 11 is provided as close as possible to the cab 21 at a position where the telescopic boom 11 (the winch 12 in the telescopic boom 11 in the illustrated example) does not interfere with the cab 21 by the hoisting operation. It is like that. In the embodiment, the hoisting fulcrum 31 (pivot position) of the telescopic boom 11 is provided at the upper end of the inclined portion 10b, and the position of the hoisting fulcrum is substantially directly above the articulate pin. In this case, the winch 12 provided protruding from the rear end portion of the telescopic boom 11 draws a circular track 32 in a side view on the rear end side with the hoisting fulcrum 31 as the center in accordance with the hoisting operation of the telescopic boom 11. Moving. Therefore, in order to prevent the cab 21 and the telescopic boom 11 from interfering with each other, the cab 21 and the telescopic boom 11 are provided with a predetermined distance (in the embodiment, a distance from the hoisting fulcrum to the outer edge of the winch 12). It is done. If the space between the cab 21 and the telescopic boom 11 is too large and unnecessarily large, the distance from the cab 21 to the tip of the telescopic boom 11 becomes long, and the crane 1 is moved with the first frame 10 side in the forward direction. When moving, the operability of driving may be reduced. Therefore, it is preferable that the telescopic boom 11 is provided as close as possible at a position in a range where the cab 21 and the telescopic boom 11 do not interfere with each other. In the embodiment, for example, the telescopic boom 11 is made into a multistage type of six stages, so that the length of the telescopic boom 11 in the contracted state is shortened, and the distance from the cab 21 to the tip of the telescopic boom 11 does not increase. I am doing so.

  In the first frame 10, a mounting table 19 is provided above the first axle 13 for mounting the load 50 a lifted by a crane or for supporting a part of the lifted load 50 b. The mounting table 19 in the illustrated example is supported by being fixed to a support portion (not shown) provided so as to protrude upward from the position where the first axle 13 is provided in the first frame 10, and the inclined portion 10b. Are fixed and supported below the pivot position 33 of the hoisting cylinder 17 in FIG. As a result, the mounting table 19 is provided at a position lower than the height at which the undulating cylinder 17 is provided and above the first axle 13. Therefore, when the load 50a (see FIG. 2 (a)) is placed on the mounting table or when a part of the load 50b (see FIG. 2 (b)) is supported, the hoisting cylinder 17 and the loads 50a, 50b Are prevented from interfering with each other. Note that one end side of the mounting table 19 is not necessarily fixed to the inclined portion 10b. For example, if a support portion is provided in addition to the support portion provided at the position of the first axle 13, the inclined portion 10b You may make it provide the mounting base 19 in the space | interval between. Moreover, although the mounting base 19 of the example of illustration is provided with the fence-shaped part protrudingly provided by the upper side in the left-right direction, it is not limited to this.

  The second frame 20 includes a lower frame 20a extending in the front-rear direction (left-right direction in FIG. 1) and a vertical frame 20b provided on the front side of the lower frame 20a. The lower frame 20a includes a second axle 23 having a driving wheel 3b on the rear side, and an engine E for driving the wheel 3b and a hydraulic actuator such as a hoisting cylinder 17 and a winch on the front side. The vertical frame 20b extends upward so as to surround the engine E on the front side of the lower frame 20a, and includes a connecting portion (articulate pin) with the first frame 10. In addition, the vertical frame 20b in the illustrated example has a substantially triangular prism shape, and is configured in a triangular shape in a side view with an upper end portion as one vertex and a lower end portion as one side. The upper end portion is provided so as to be rotatable with respect to the upper end of the inclined portion 10 b in the first frame 10, and the lower end portion is provided so as to be rotatable with respect to the lower frame 10 a of the first frame 10. The center is a connecting portion with the first frame 10. In the second frame including the lower frame 20a and the vertical frame 20b, a cab 21 for performing a crane operation and a traveling operation is provided above the second axle 23.

  A seat 25 is provided in the cab 21 for a driver to perform crane operation and traveling operation. The seat 25 is arranged in two directions, the first frame 10 side (front side) and the opposite side (rear side). It can be reversed. As shown in FIG. 1, when the front side of the seat 25 faces the opposite side of the first frame 10, only a traveling operation is possible, as shown in FIGS. 2 (a) and 2 (b). As described above, when the front surface of the seat 25 faces the first frame 10, the traveling operation and the crane operation are possible.

  In the illustrated example, on the front side (first frame 10 side) in the cab 21, as a first operation unit, a handle 26 for performing a traveling operation (not shown except for the handle) and a crane operation are performed. The operation rod 27 is provided. For example, when the seat 25 is fixed with the front side facing the front by detecting the orientation of the seat 25 by a sensor or the like, various operations are performed by the first operation unit (the handle 26 and the like, the operation rod 27). Can be done. Further, on the rear side (the side opposite to the first frame 10) in the cab 21, a handle 28 and the like (not shown except for the handle) are provided as a second operation unit for performing a traveling operation. Then, for example, by detecting the orientation of the seat 25 by a sensor or the like, when the seat 25 is fixed with the rear side facing the front, the traveling operation can be performed by the second operation unit (the handle 28 or the like). It can be done.

  With such a configuration, for example, when traveling at a certain high speed as in traveling on a public road or the like, as shown in FIG. 1, the front of the seat 25 is fixed toward the rear side, and the second frame 20 is fixed. The traveling operation of the crane vehicle 1 is performed by the second operation unit with the side (rear side) as the forward direction. And when moving a predetermined load, etc., as shown in FIG. 2, the front of the seat 25 is fixed to the front side, the first frame 10 side is set as the forward direction, and the crane is operated by the first operation unit. The cargo is suspended by a crane by operating the. In this state, the load 50a is placed on the mounting table 19 as shown in FIG. 2A by the crane, or a part of the luggage 50b is placed on the mounting table 19 as shown in FIG. It is something to support. Thus, since the forward direction can be changed simply by reversing the seat 25, the second frame 20 side can be set as the forward direction when moving the crane 1 and the forward direction side There is no telescopic boom 11 or luggage, and the field of view is good. In this case, since the first operation unit for crane operation does not function, there is no malfunction of the crane.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention.

  For example, in the cab, an example is shown in which a first operation unit for performing a traveling operation and a crane operation is provided on the front side, and a second operating unit for performing a traveling operation is provided on the rear side. Not limited to this. It is sufficient that the seat can be reversed, the traveling operation and the crane operation can be performed when the front of the seat is facing the front side, and only the traveling operation can be performed when the seat is facing the rear side. An operation unit for traveling and crane operation may be provided in the center, and the seat may be reversed by turning around the operation unit. In this case, when the front of the seat is facing backward, the operation unit is controlled so that crane operation cannot be performed. Further, for example, instead of a handle or the like for performing a traveling operation in the first operation unit provided on the front side of the cab, an operating rod capable of performing the same traveling operation may be provided.

  Further, the configuration is such that the orientation of the seat is detected by a sensor or the like, and the first operation unit can be used when the seat is facing forward, and the second operation unit can be used when the seat is facing backward. Although shown, it is not limited to this. When the crane is operated by the first operation unit with the seat facing forward, the PTO for taking out engine power is turned on, and the traveling operation is performed by the second operation unit with the seat directed rearward Since the PTO is off, for example, the orientation of the seat may be determined by determining whether the PTO is on or off. In this case, the traveling operation and crane operation can be performed by the first operation unit when the PTO is on, and the traveling operation can be performed by the second operation unit when the PTO is off.

DESCRIPTION OF SYMBOLS 1 Crane vehicle 3a, 3b Wheel 10 1st frame 11 Telescopic boom 13 1st axle 20 2nd frame 21 Driver's cab 23 2nd axle 25 Seat

Claims (3)

A first frame having a first axle with wheels on the left and right and a telescopic boom provided in a freely swingable manner; a second frame with a second axle with wheels on the left and right; and a cab. A crane vehicle in which the first frame and the second frame are connected to be able to be bent relative to the left and right direction around an articulate pin provided in the up and down direction,
The seat provided in the driver's cab can be reversed in two directions, the first frame side and the opposite side,
When the front of the seat faces the first frame side, traveling operation and crane operation are possible,
A crane vehicle, wherein only a traveling operation is possible when a front surface of the seat faces an opposite side of the first frame side. In the driver's cab, a first operation unit for performing a traveling operation and a crane operation on the first frame side is provided, and a second operation unit for performing a traveling operation on the opposite side of the first frame side. Is provided,
The first operation unit can be operated only when the front of the seat faces the first frame side,
2. The crane according to claim 1, wherein the second operation unit can be operated only when a front surface of the seat faces an opposite side of the first frame side.   The crane vehicle according to claim 1 or 2, wherein the hoisting fulcrum of the telescopic boom is disposed substantially immediately above the articulate pin.

Images