JP2008120525A - Crane device with telescopic boom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve safety in work by avoiding interference of a tension wire and a tension adjusting cylinder with peripheral structures and preventing a change in a fleet angle of the tension wire, in a crane device with a telescopic boom. <P>SOLUTION: The tension wire 11 composing the whole or a part of a second tension member 8 is delivered from a winch 14 arranged on a mast 4 by partially overlapping a drum 14a, passed through the inside of the mast 4, and wound around sheaves 16, 17 arranged at the end 4b of the mast 4. In the mast 4, the tension wire 11 is stored inside of the mast 4. For example, when the mast 4 is separated from or approaches the telescopic boom 3 in association with erecting/storing operation of the mast, the tension wire 11 is previously and certainly prevented from being damaged by being interfered with the telescopic boom 3 or the other structures arranged around it. Thereby, reliability in work of the crane device with the telescopic boom is improved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a crane apparatus with a telescopic boom provided with a reinforcing means against bending deformation of the telescopic boom.

  In a crane apparatus equipped with a telescopic boom, in particular, a telescopic boom having a large total extension, the telescopic boom can be expanded from the standpoint of improving operational safety by suppressing bending deformation due to its own weight and suspension load. It has been proposed that the boom be provided with reinforcing means against the bending deformation (see, for example, Patent Document 1 and Patent Document 2).

  The thing of patent document 1 arrange | positions a tension base in the back surface (upper surface) of the base end side boom of an expansion-contraction boom, The wire rope paid out from the winch arrange | positioned in the base end part of this tension base, It passes through the outside of the tension base and hangs around a sheave provided at the tip of the tension base.

  In addition, a tension cylinder is attached to a rope that is stretched between the stretch base and the end of the base end side boom for tension adjustment.

  Patent Document 2 discloses a base of a telescopic boom as a reinforcing means for bending deformation in the vertical direction (direction along the boom hoisting surface) of the telescopic boom and bending deformation in the horizontal direction (direction orthogonal to the boom hoisting surface). While placing the mast on the back (upper surface) of the end-side boom, attach an arm that protrudes from the axis of the telescopic boom to both sides at the end of the telescopic boom, and connect the front end of the mast and the left and right ends of the arm with a guy rope. Concatenated.

Japanese Patent Laid-Open No. 57-184092 JP 2006-206233 A.

  However, in the one shown in Patent Document 1, a wire rope fed out from a winch arranged at the base end of the tensioning base is passed through the outside of the tensioning base in an exposed state to the tip of the tensioning base. It is designed to be hung around the sheave that is provided, and the retracting stand has a retracted position along the telescopic boom because it is necessary to keep the height dimension low in the retracted state. During the work, the wire rope may interfere with the surrounding structure and be damaged.

  Moreover, in what is shown by patent document 1, since the said tension | pulling cylinder was a structure which can move freely, there also existed a possibility of interfering with a surrounding structure and damaging in the assembly operation etc. of a crane apparatus.

  On the other hand, in the one shown in Patent Document 2, the tip of the guy rope can be selectively locked to the tip of the telescopic boom and the left and right ends of the arm. In a structure that does not open to the left and right, the arm is attached to the tip of the telescopic boom, and the tip of the guy rope is fixed to the tip of the telescopic boom without the arm attached to the tip of the telescopic boom. The fleet angle of the guy rope with respect to the mast-side sheave changes depending on the amount of extension of the telescopic boom while it is locked to the tip of the boom. There is nothing to be shown.

  Therefore, the present invention avoids interference with the surrounding structure of the tension wire and the tension adjusting cylinder in the crane apparatus with the telescopic boom, and improves work safety by preventing a change in the fleet angle of the tension wire. It was made for the purpose.

  In the present invention, the following configuration is adopted as a specific means for solving such a problem.

  In the first invention of the present application, in the crane device with an extendable boom 3 in which the extendable boom 3 is mounted on the vehicle 1 via the swivel base 2, the base end portion 4 a is connected to the extendable boom 3. A mast 4 that can be stood and stored on the rear side of the telescopic boom 3, a first tension member 7 that is disposed between the distal end 4 b of the mast 4 and the base end 3 b of the telescopic boom 3, and the mast 4, a second tension member 8 disposed between the distal end 4 b of the telescopic boom 4 and the distal end 3 a of the telescopic boom 3, and a winch 14 disposed by superposing a part of the drum 14 a on the mast 4. The two-tension member 8 is stretched by a tension wire 11 that is drawn out from the winch 14 and passes around the sheaves 16 and 17 provided on the tip 4b side of the mast 4 through the inside of the mast 4. It is characterized in that all or part is formed.

  In the second invention of the present application, in the crane device with the telescopic boom 3 in which the telescopic boom 3 is mounted on the vehicle 1 via the swivel base 2, the base end portion 4 a is connected to the telescopic boom 3, A mast 4 that can be stood and stored on the rear side of the telescopic boom 3, a first tension member 7 that is disposed between the distal end 4 b of the mast 4 and the base end 3 b of the telescopic boom 3, and the mast 4 is a second tension member 8 disposed between the tip 4b of the telescopic boom 4 and the tip 3a of the telescopic boom 3, all or part of which is drawn out from the drum 14a of the winch 14 disposed in the mast 4. It is detachable from the second tension member 8 composed of the tension wire 11 wound around the sheaves 16 and 17 provided on the tip 4b side of the mast 4 and the tip 3a of the telescopic boom 3. An arm provided with a locking fixing portion 32 to which the distal end member 33 of the second tension member 8 can be locked is positioned on the outer side in the boom width direction than the locking fixing portion 31 provided on the telescopic boom 3 side. The pull-out direction of the tension wire 11 is guided to the member 5 and the swing bracket 25 arranged so as to be swingable and rotatable in a plane substantially parallel to the undulating surface of the telescopic boom 3 on the tip 4b side of the mast 4. A guide mechanism 24 is provided, in which the guide bodies 26 and 27 are attached to be rotatable about an axis substantially orthogonal to the undulating surface.

  In the third invention of the present application, in the crane device with the telescopic boom 3 in which the telescopic boom 3 is mounted on the vehicle 1 via the swivel 2, the base end portion 4a of the telescopic boom 3 is connected to the telescopic boom 3. A mast 4 that can be stood and stored on the rear side of the telescopic boom 3, a first tension member 7 that is disposed between the distal end 4 b of the mast 4 and the base end 3 b of the telescopic boom 3, and the mast 4, a second tension member 8 disposed between the tip 4 b of the telescopic boom 4 and the tip 3 a of the telescopic boom 3, and a tension adjustment cylinder 15 for adjusting the tension of the second tension member 8. The mast 4 is arranged on the mast 4 side so as to be parallel to the mast 4.

  In the present invention, the following effects can be obtained.

  (1) According to the crane apparatus with the telescopic boom according to the first invention of the present application, the tension wire 11 constituting all or part of the second tension member 8 is connected to the mast 4 and a part of the drum 14a. Since the mast 4 is passed through the mast 4 and passed through sheaves 16 and 17 provided on the tip 4b side of the mast 4, the mast 4 portion has the tension. The wire 11 is housed inside the mast 4, so that, for example, when the mast 4 moves away from or approaches the telescopic boom 3 with its standing and retracting operation, the tension wire 11 expands and contracts. The boom 3 is prevented from being damaged by interference with other structures provided on the side of the boom 3 or its surroundings, and the telescopic boom can be prevented. Work on the reliability of the come crane equipment can be improved.

  (2) According to the crane apparatus with a telescopic boom according to the second invention of the present application, the mast 4 is disposed between the tip 4b of the mast 4 and the tip 3a of the telescopic boom 3, and all or part of the mast 4 is part of the mast. A distal end member 33 of the second tension member 8 composed of a tension wire 11 which is drawn out from the drum 14a of the winch 14 disposed at 4 and is wound around the sheaves 16 and 17 provided on the distal end 4b side of the mast 4. The locking and fixing part 31 provided on the telescopic boom 3 side and the locking and fixing part 32 on the arm member 5 side provided on the outer side in the boom width direction than the locking and fixing part 31 on the telescopic boom 3 side. Since the fleet angle of the tension wire 11 in each of the sheaves 16 and 17 can be selectively locked, the distal end member 33 of the second tension member 8 is connected to the telescopic boom. When it is locked to the locking / fixing portion 31 provided on the side 3 and when it is locked to the locking / fixing portion 32 on the side of the arm member 5, the tip member of the second tension member 8 changes laterally. Even if the locking position of 33 is the same, it changes in both the horizontal and vertical directions depending on the amount of extension of the telescopic boom 3.

  In this case, in the present invention, the pull-out direction of the tension wire 11 is placed on the swing bracket 25 arranged so as to be able to swing and swing in a plane substantially parallel to the undulating surface of the telescopic boom 3 on the tip 4b side of the mast 4. Is provided with a guide mechanism 24 that is mounted so as to be rotatable about an axis substantially orthogonal to the undulating surface. Therefore, the tip member 33 of the second tension member 8 is connected to the telescopic boom 3 side. The lateral direction based on the change of the fleet angle in the lateral direction and the extension amount of the telescopic boom 3 between the case where it is locked to the locking and fixing portion 31 and the case where it is locked to the locking and fixing portion 32 on the arm member 5 side. The change of the fleet angle in the vertical direction is prevented by the guide bodies 26 and 27, and the change of the fleet angle in the vertical direction based on the extension amount of the telescopic boom 3 is This prevents the swing bracket 25 from swinging. As a result, the fleet angle in the sheaves 16 and 17 is always kept substantially constant, and the operation of the second tension member 8 becomes more reliable, and as a result extends and contracts. The operational reliability of the boom crane apparatus will be improved.

  (3) According to the crane device with the telescopic boom according to the third invention of the present application, the tension of the second tension member 8 disposed between the tip 4b of the mast 4 and the tip 3a of the telescopic boom 3 is adjusted. Since the tension adjusting cylinder 15 is arranged on the mast 4 side so as to be parallel to the mast 4, for example, the mast like the conventional structure in which the tension adjusting cylinder 15 is freely movable. Interference between the tension adjusting cylinder 15 and the surrounding structure in the mounting / assembling process 4 can be avoided without fail.

  In addition, the mast 4 is usually set in a posture so as to take a posture substantially parallel to the telescopic boom 3 in the retracted state. In this case, the tension adjusting cylinder 15 is parallel to the mast 4. Since it is arranged on the mast 4 side so as to be maintained, the tension adjustment cylinder 15 does not extend upward from the mast 4 in the attitude in which the mast 4 is stored, and the on-site traveling attitude of the crane apparatus It is possible to keep the overall height at a low level, which is advantageous in traveling on the premises of the crane device.

  In FIG. 1, the crane vehicle Z as embodiment of the crane apparatus with an expansion-contraction boom which concerns on this invention is shown. First, the overall configuration of the crane vehicle Z will be outlined.

  The crane vehicle Z is undulated by a boom hoisting cylinder 9 in which a base end portion 3b of a telescopic boom 3 is connected to a swivel base 2 mounted on the vehicle 1 and the telescopic boom 3 is disposed between the swivel base 2. In addition, the distal end 4b of the mast 4 standing on the distal end 3Aa of the proximal boom 3A of the telescopic boom 3 and the proximal end 3b of the telescopic boom 3 are connected by a pair of left and right first tension members 7. The tip 4b of the mast 4 and the tip 3a of the telescopic boom 3, that is, the tip 3Ea of the tip boom 3E are connected by a second tension member 8, and the tension between the first tension member 7 and the second tension member 8 is connected. Thus, bending deformation of the telescopic boom 3 in the vertical direction (direction along the undulating surface) is suppressed.

  Further, the arm member 5 is detachably attached to the distal end portion 3Ea of the distal end boom 3E of the telescopic boom 3, and simultaneously with the vertical bending deformation of the telescopic boom 3, its lateral direction (direction perpendicular to the undulating surface). When it is desired to suppress the bending deformation, the tip of the second tension member 8 is locked to the arm member 5 side. A jib 6 can be detachably attached to the tip of the arm member 5.

  FIG. 2 shows the on-site traveling posture of the crane vehicle Z. In this on-campus traveling posture, the telescopic boom 3 is fully laid down with full contraction, and the mast 4 is laid down along the telescopic boom 3 on the back surface (upper surface) side of the telescopic boom 3 (hereinafter referred to as this time). The posture of the mast 4 is referred to as “storage posture”). The first tension member 7 is stored along the telescopic boom 3 in a partially folded state. Further, the second tension member 8 is stored along the mast 4 in a state in which a tension wire 11 constituting a part thereof is wound around a winch 14 provided on the mast 4 side.

  FIG. 3 shows a state where the mast 4 is erected by the mast hoisting cylinder 10 from the state of the on-site traveling posture shown in FIG. 2 (the posture of the mast 4 at this time is referred to as “standing posture”). ). In the standing position of the mast 4, the first tension member 7 extends and is stretched between the base end portion 3 b of the telescopic boom 3 and the tip end portion 4 b of the mast 4, and the second tension. The member 8 is stretched between the distal end portion 3a of the telescopic boom 3 and the distal end portion 4b of the mast 4 in a state where the tension wire 11 is wound around the winch 14, and the mast 4 is stretched by the tension between them. Maintains a standing posture. From this state, when the telescopic boom 3 is extended, the tension wire 11 of the second tension member 8 is fed out from the winch 14 following this, and the first boom is extended regardless of the extension amount of the telescopic boom 3. The mast 4 maintains the standing posture by the tension of the first tension member 7 and the second tension member 8 (see FIG. 1).

Next, the structure of each part of the crane vehicle Z will be described individually.
(A) Telescopic boom 3
As shown in FIG. 3, the telescopic boom 3 is a four-stage telescopic boom constructed by sequentially putting a proximal boom 3A, three intermediate booms 3B to 3D, and a distal boom 3E into a telescopic shape, A base end 3Ab of the base end boom 3A is connected to the swivel base 2 side. One end of a first tension member 7 composed of four tension rods 7A to 7D that can be bent and extended with each other is connected to the base end portion 3Ab of the base end boom 3A.

  Further, as shown in FIGS. 3, 4 and 7, mast fixing brackets 29 and 29 are provided on both upper side portions of the distal end portion 3Aa of the base end boom 3A. Left and right base ends 4a, 4a of a mast 4 to be described later are connected.

On the other hand, as shown in FIG. 3, FIG. 4, FIG. 8, and FIG. 9, the front end member 33 of the second tension member 8 to be described later is engaged with the left and right side surfaces of the front end portion of the front end boom 3E. A fixing portion 31 is provided. An arm member 5 described below is detachably attached to the distal end side of the distal end boom 3E, and a jib 6 is detachably attached to the distal end side of the arm member 5.
(B) Arm member 5
As shown in FIGS. 8 and 9, the arm member 5 includes a pair of left and right extending portions 5A and 5B, and the distal ends of the extending portions 5A and 5B are the distal ends on the second tension member 8 side. A locking fixing portion 32 that can lock the member 33 is provided. The interval between the pair of left and right locking and fixing portions 32 and 32 is set to be larger than the interval between the pair of left and right locking and fixing portions 31 and 31 provided on the distal end boom 3E side of the telescopic boom 3.
(C) Mast 4
As shown in FIG. 4, the mast 4 has a pair of left and right mast bodies 41, 41 and each of the mast bodies 41, 41 connected to each other with a joint member 42 at the tip side, and has a substantially portal shape. The base end portions of the mast bodies 41, 41 (that is, the base end portion 4a of the mast 4) are connected to the mast fixing brackets 29, 29 on the distal end boom 3E side so that the connection portions are rotated. It can be rotated in the front-rear direction (the direction along the undulating surface of the telescopic boom 3) as a center, and the retracted posture and the standing posture of the post hoisting cylinder 10 disposed between the telescopic boom 3 are retracted. The posture is selectively set to either one.

  As shown in FIGS. 4 and 7, a winch that is driven to rotate by a hydraulic motor 23 is located near the base end of each mast body 41, 41 of the mast 4, that is, near the base end 4 a of the mast 4. 14 is exposed to the back surface 4d side of the mast 4 (the side facing the telescopic boom 3 in the retracted position of the mast 4) in a state where a part of the drum 14a is superposed on the mast 4 in a side view. Each is arranged in a state. One end of each of the winches 14 and 14 is fixed to the drum 14a, and the tension wire 11 fed out from the drum 14a is fed out from the side closer to the front surface 4c of the mast 4 than the axis of the drum 14a. It has become. Accordingly, the tension wires 11 and 11 fed out from the drums 14 a and 14 a of the winches 14 and 14 always pass through the mast 4.

  A latch claw 19 is provided on the outer peripheral surface of the flange portion 14 b of the winch 14. The latch pawl 19 can be selectively engaged with the tip of a latch arm 20 that is disposed radially outward of the flange 14b and tilted by the lock cylinder 21. In the engaged state, the operation of the winch 14 in the feeding direction is restricted.

  On the other hand, the tip 4b of the mast 4, that is, the tip of each of the mast main bodies 41 and 41, respectively, is provided with two tip sheaves 16 and 17 as shown in FIGS. (Sheaves 16 and 17) are supported rotatably by a sheave support shaft 28 extending in a direction perpendicular to the undulating surface of the mast 4. Further, a swing bracket 25 is attached to the sheave support shaft 28 so as to be swingable about the sheave support shaft 28, and a pair of left and right guide sheaves 26 and 27 are attached to the swing bracket 25 (claims). Of the pair of mast tip sheaves 16 and 17, the opposing gap portion is positioned substantially on the extension of the receiving groove of the second tip sheave 17 located on the outer side in the mast width direction. It is installed as you do. Further, a guide pin 18 extending substantially parallel to the sheave axis line is provided at the lateral position of the first tip sheave 16 of the swing bracket 25 on the extension of the receiving groove of the first tip sheave 16 located inside the mast width direction. It is attached so that it may come off slightly inward in the width direction. In this embodiment, the pair of guide sheaves 26 and 27 and the guide pin 18 are attached to the swing bracket 25 to constitute the “guide mechanism 24” in the claims.

  As shown in FIGS. 4 and 5, a tension adjusting cylinder 15 is attached to the lower portion of the outer surface 4 e of each of the mast bodies 41, 41 of the mast 4. The tension adjusting cylinder 15 is fixedly disposed so as to be substantially parallel to the mast 4 with its rod end facing the tip 4b side of the mast 4. In this case, the relative mounting position of the tension adjusting cylinder 15 with respect to the mast 4 is such that the axis of the tension adjusting cylinder 15 is substantially in contact with the pitch circle of the second tip sheave 17 on the back surface 4d side of the mast 4. Is set to

  Here, with reference to FIG. 10 in addition to FIGS. 4 to 9, a winding form of the tension wire 11 fed from the winch 14 will be described. One end of the winch 14 is fixed to the drum 14a, and the tension wire 11 fed from the drum 14a passes through the mast 4 and is drawn to the tip 4b side of the mast 4, and the tip 4b side. , The first tip sheave 16 is wound around from the lower side to the upper side, then pulled out to the base end 4a side of the mast 4, and then folded back at the folding sheave 12 described below, and the second tip sheave 17 is drawn. Is wound from the upper side to the lower side. The tension wire 11 drawn from the lower side of the second distal end sheave 17 to the proximal end 4a side of the mast 4 is connected to the rod end of the tension adjusting cylinder 15 via the distal end member 35.

  Therefore, when the winch 14 rotates to the winding side, the folded sheave 12 is drawn toward the tip 4b side of the mast 4 via the tension wire 11, and conversely, the winch 14 rotates to the feeding side. Thus, the folded sheave 12 moves in a direction away from the tip 4 b of the mast 4 via the tension wire 11.

  In order to link the movement of the folding sheave 12 with the expansion / contraction operation of the telescopic boom 3, and to apply a required tension between the tip 4b of the mast 4 and the tip 3a of the telescopic boom 3, the folding sheave 12 is provided. Is attached with the tension wire 13 described below.

  As shown in FIGS. 4 to 5, the tension wire 13 is composed of a rod body having a predetermined length provided with a tip member 33 at one end and a tip member 34 at the other end. Then, the one tip member 33 is locked to the locking fixing portion 31 (see FIG. 8) provided on the tip boom 3E side of the telescopic boom 3, and the other tip member 34 is held by the folded sheave 12. The sheave bracket 36 is connected. As described above, one end member 33 of the tension wire 13 is selectively engaged with the locking / fixing portion 31 on the telescopic boom 3 side and the locking / fixing portion 32 on the arm member 5 side. It can be stopped.

  In this embodiment, the tension wire 11 and the tension wire 13 constitute a “second tension member 8” in the claims. In this embodiment, the two tension members 11 and 13 constituting the second tension member 8 are both constituted by wires. However, in another embodiment of the present invention, the tension wire 13 is constituted by a rod. "Tension rod 13".

On the other hand, the tension adjusting cylinder 15 has a function of adjusting the distance between the tip sheaves 16 and 17 and the folded sheave 12 by expansion and contraction, and is provided in each mast main body 41 and 41 of the mast 4. Furthermore, the tension imbalance between the pair of left and right second tension members 8, 8 can be adjusted by adjusting the expansion / contraction of the tension adjusting cylinders 15, 15.
(D) Operation of mobile crane Z, etc. Next, the operation of the mobile crane Z configured as described above, the specific operational effects, and the like will be described.

  In the crane vehicle Z, as shown in FIG. 2, the telescopic boom 3 is laid down in the fully contracted state and the mast 4 is set in the retracted position when traveling on the premises. When moving from the on-site running posture to the crane work using the telescopic boom 3, the posture of the mast 4 is first changed from the retracted posture to the standing posture by the post hoisting cylinder 10 as shown in FIG. This is supported from the front and back by the first tension member 7 and the second tension member 8. Thereafter, the telescopic boom 3 is raised and extended to the working posture shown in FIG. 1, and crane work is performed in this working posture. In this working posture, the vertical deformation due to the weight of the telescopic boom 3 or the suspension load is supported by the tension of the first tension member 7 and the second tension member 8.

  Not only the vertical deformation of the telescopic boom 3 is suppressed, but, for example, when the jib 6 is further mounted on the distal end 3a side of the telescopic boom 3, the telescopic boom 3 can be operated. When it is necessary to suppress not only the vertical bending deformation but also the lateral bending deformation, the arm member 5 is attached to the distal end 3a of the telescopic boom 3, and the locking provided on the arm member 5 is provided. The distal end member 33 provided at the distal end of the second tension member 8, that is, the distal end of the tension wire 13 is engaged with the fixing portion 32.

In the crane vehicle Z operated in this way, the following specific effects can be obtained by the above-described specific configuration.
(D-1) In the crane vehicle Z of this embodiment, the winch 14 disposed on the mast 4 is attached so that a part of the drum 14a is superposed on the mast 4, and is fed out from the drum 14a. The tension wire 11 that passes through the inside of the mast 4 and hangs around the first tip sheave 16 so that the tension wire 11 is interposed between the winch 14 and the first tip sheave 16. It is housed inside the mast 4 and is not exposed to the outside. For this reason, for example, when the mast 4 is moved away from or close to the telescopic boom 3 and its posture is changed between the standing posture and the retracted posture, the tension wire 11 is connected to the telescopic boom 3 side or its side. Interference with other structures provided in the surrounding area and damage can be prevented without fail, and the operational reliability of the crane vehicle Z is improved.
(D-2) In the crane vehicle Z of this embodiment, the crane is wound around the tip sheaves 16 and 17 that are fed from the drum 14a of the winch 14 disposed on the mast 4 and provided on the tip 4b side of the mast 4. The tension wire 11 and the tension wire 13 connected to the tension wire 11 through the folded sheave 12 constitute the second tension member 8, and the tip of the second tension member 8, that is, the above-mentioned The tip member 33 provided at the tip of the tension wire 13 is positioned on the outer side in the boom width direction with respect to the locking fixing portion 31 provided on the telescopic boom 3 side and the locking fixing portion 31 on the telescopic boom 3 side. Since it is configured so that it can be selectively locked to the locking fixing portion 32 on the side of the arm member 5 provided, the tension in each of the sheaves 16 and 17 is determined. The fleet angle of the wire 11 is locked when the tip member 33 of the second tension member 8 is locked to the locking and fixing part 31 on the telescopic boom 3 side and to the locking and fixing part 32 on the arm member 5 side. In some cases, and even if the locking position of the tip member 33 of the second tension member 8 is the same, it changes both in the horizontal direction and in the vertical direction depending on the amount of extension of the telescopic boom 3. (Refer to the angle “β” in FIG. 5 and the angles “α1” and “α2” in FIG. 6).

However, in the crane vehicle Z of this embodiment, the tension bracket 25 is disposed on the tip 4b side of the mast 4 so as to be swingable in a plane substantially parallel to the undulating surface of the telescopic boom 3. Since a pair of guide sheaves 26 and 27 for guiding the drawing direction of the wire 11 are rotatably mounted around an axis substantially orthogonal to the undulation surface, the guide mechanism 24 is provided to which the guide pin 18 is attached. The fleet angle in the lateral direction between when the tip member 33 of the two-tension member 8 is locked to the locking and fixing part 31 on the telescopic boom 3 side and when locked to the locking and fixing part 32 on the arm member 5 side. And the change in the fleet angle in the lateral direction based on the extension amount of the telescopic boom 3 are both the guide sheaves 26 and 27 and the guide pin. 8 is prevented by. As a result, the fleet angles at the tip sheaves 16 and 17 are always kept substantially constant, the operation of the second tension member 8 becomes more reliable, and the operational reliability of the crane vehicle Z is improved. It will be.
(D-3) In the crane vehicle Z of this embodiment, the tension adjusting cylinder 15 for adjusting the tension of the second tension member 8 disposed between the tip 4b of the mast 4 and the tip 3a of the telescopic boom 3 is provided. Since the mast 4 is arranged on the mast 4 side so as to be parallel to the mast 4, for example, the mounting / assembly of the mast 4 like the conventional structure in which the tension adjusting cylinder 15 is freely movable is possible. Interference between the tension adjusting cylinder 15 and surrounding structures in the process can be avoided without fail.

In addition, the mast 4 is usually set in a posture so as to take a posture substantially parallel to the telescopic boom 3 in the retracted state. In this case, the tension adjusting cylinder 15 is parallel to the mast 4. Since it is arranged on the mast 4 side so as to be maintained, the tension adjustment cylinder 15 does not extend upward from the mast 4 in the posture in which the mast 4 is stored, and the crane vehicle Z is traveling on the premises. The overall height in the posture can be kept low, which is advantageous for on-site running.
(E) Others (e-1) In this embodiment, the second tension member 8 is composed of the tension wire 11 and the tension wire 13, but the present invention is not limited to such a configuration. For example, the second tension member 8 can be constituted by only the tension wire 11, and the folded sheave 12 can be directly attached to the distal end 3a side of the telescopic boom 3 or the arm member 5 side. .
(E-2) In this embodiment, the guide member in the guide mechanism 24 disposed on the distal end 4b side of the mast 4 is configured with a sheave, but the present invention is not limited to such a configuration, For example, the guide member can be made of a pin material.

1 is an overall side view of a crane truck according to an embodiment of the present invention. It is a driving | running | working state figure of the crane vehicle shown in FIG. It is a mast overhang | projection state figure in the crane vehicle shown in FIG. FIG. 4 is an enlarged view taken along IV-IV in FIG. 3. FIG. 5 is a VV enlarged arrow view of FIG. 4. FIG. 6 is an enlarged view taken along the line VI-VI in FIG. 5. It is an enlarged view of the VII-VII part of FIG. It is an enlarged view of the VIII part of FIG. It is the IX-IX arrow directional view of FIG. It is a handling figure of an expansion-contraction tension member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ·· Vehicle 2 ·· Swing base 3 · · Telescopic boom 4 · · Mast 5 · · Arm member 6 · · Jib 7 · · First tension member 8 · · Second tension member 9 · · Boom raising and lowering cylinder 10 · · Mast hoisting cylinder 11 ·· Tension wire 12 ·· Folding sheave 13 ·· Tension wire 14 ·· Winch 15 ·· Tension adjusting cylinder 16 ·· First tip sheave 17 ·· Second tip sheave 18 ·· Guide pin 19 ··· Latch claw 20 ·· Latch arm 21 ·· Lock cylinder 22 ·· Winch shaft 23 ·· Hydraulic motor 24 ·· Guide mechanism 25 ·· Oscillating bracket 26 ·· First guide sheave 27 ·· Second guide sheave 28 ·· Sheave support shaft 29 .. Mast fixing bracket 31 .. Locking fixing portion 32 .. Locking fixing portion 33. 34 ... tip member 35 ... the tip member 36 .. sheave bracket 41 · mast body 42 .. Tsugizai Z · Crane

Claims (3)

A crane device with a telescopic boom, wherein a telescopic boom (3) is mounted on a vehicle (1) via a swivel base (2) so that it can be raised and lowered.
A mast (4) whose base end (4a) is connected to the telescopic boom (3) and can be stood and stored on the back side of the telescopic boom (3);
A first tension member (7) disposed between the tip (4b) of the mast (4) and the base end (3b) of the telescopic boom (3);
A second tension member (8) disposed between the tip (4b) of the mast (4) and the tip (3a) of the telescopic boom (3);
The mast (4) includes a winch (14) disposed by polymerizing a part of the drum (14a), and
The second tension member (8) extends from the winch (14), passes through the inside of the mast (4), and hangs on a sheave (16, 17) provided on the tip (4b) side of the mast (4). A crane apparatus with a telescopic boom, wherein the tension wire (11) to be rotated is entirely or partially configured.
A crane device with a telescopic boom, wherein a telescopic boom (3) is mounted on a vehicle (1) via a swivel base (2) so that it can be raised and lowered.
A mast (4) whose base end (4a) is connected to the telescopic boom (3) and can be stood and stored on the back side of the telescopic boom (3);
A first tension member (7) disposed between the tip (4b) of the mast (4) and the base end (3b) of the telescopic boom (3);
A second tension member (8) disposed between the tip (4b) of the mast (4) and the tip (3a) of the telescopic boom (3), all or part of which is the mast (4 ) Disposed on the winch (14) disposed on the drum (14a), and the tension wire (11) is wound around the sheaves (16, 17) provided on the tip (4b) side of the mast (4). A second tension member (8)
A locking and fixing portion (32) that can be attached to and detached from the distal end (3a) of the telescopic boom (3) and that can be engaged with the distal end member (33) of the second tension member (8) includes the telescopic boom. (3) an arm member (5) provided on the outer side in the boom width direction than the locking and fixing portion (31) provided on the side;
On the tip (4b) side of the mast (4), the tension wire (11) is attached to a swing bracket (25) disposed so as to be swingable in a plane substantially parallel to the undulating surface of the telescopic boom (3). A crane apparatus with a telescopic boom, comprising a guide mechanism (24) in which a guide body (26, 27) for guiding the pull-out direction is rotatably mounted about an axis substantially orthogonal to the undulating surface.
A crane device with a telescopic boom, wherein a telescopic boom (3) is mounted on a vehicle (1) via a swivel base (2) so that it can be raised and lowered.
A mast (4) whose base end (4a) is connected to the telescopic boom (3) and can be stood and stored on the back side of the telescopic boom (3);
A first tension member (7) disposed between the tip (4b) of the mast (4) and the base end (3b) of the telescopic boom (3);
A second tension member (8) disposed between the tip (4b) of the mast (4) and the tip (3a) of the telescopic boom (3);
A tension adjusting cylinder (15) for adjusting the tension of the second tension member (8);
The crane apparatus with a telescopic boom, wherein the tension adjusting cylinder (15) is arranged on the mast (4) side so as to be parallel to the mast (4).

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