JP3822940B2 - Hook storage device for crane truck with jib - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hook storage device capable of storing a hook for a suspended load along a lower surface of the boom in a crane vehicle with a jib that can store a jib added to the tip of the boom along the lower surface of the boom. Is.
[0002]
[Prior art]
7 to 9 show a conventional crane vehicle with a jib. This crane vehicle with a jib is provided with a swivel base 11 on a vehicle 1, and the telescopic boom 2 and a cab 12 are provided on the swivel base 11. And the jib 3 that is used by being added to the boom tip 21 can be stored along the lower surface of the telescopic boom 2. The hoisting cylinder 13 of the telescopic boom 2 is provided between the swivel base 11 and the boom lower surface.
[0003]
The jib 3 is configured by connecting the left and right main pillars 31 and 31 with connecting members 32 and 32 and attaching a sheave block 34 to the tip of the jib. In the retracted state of the jib 3, the jib base end portion (base end portion of each main column 31, 31) is a support shaft (also used as a sheave shaft) that is provided laterally on the boom front end portion 21. (Also referred to as a sheave shaft) and is supported by two front and rear support portions 36 and 37 along the bottom surface of the boom. Further, the jib 3 can be swung left and right by a slight angle in a state along the bottom surface of the boom. In the retracted state, the jib 3 is stored with the jib axis B tilted by a predetermined small angle θ (θ = about 4 °) with respect to the boom axis A as shown in FIG. ing. The reason why the jib 3 is stored in an inclined state with respect to the telescopic boom 2 in this way is to prevent the jib 3 from interfering with the hoisting cylinder 13 and the sheave block 34 (the thickness of the main column 31 portion) at the tip of the jib. This is because the jib main column 31 can be stored closer to the bottom surface of the boom by positioning the large vertical height outward from the side surface of the boom. Further, tension rods 35, 35 used when the jib is used are stored on the lower surface of the jib 3 in the retracted posture. 9 is a lower surface equivalent view of the telescopic boom 2 and the jib 3 portion in FIG. 7, but a bracket 27, an auxiliary hook storage bracket 5, and an auxiliary hook 7, which will be described later, are omitted in FIG. This is illustrated in the state.
[0004]
The crane vehicle with a jib has a main hook 6 suspended from the boom tip 21 and an auxiliary hook 7 suspended from a sheave 34a provided at the tip of the jib 3 when the jib 3 is used. ing. The main hook 6 is suspended by the main wire rope 18 fed out from the main winch 16 via the upper sheave 22 and the lower sheave 24 of the boom tip 21 as shown in FIG. The main wire rope 18 is wound a plurality of times between the lower sheave 24 of the boom tip 21 and the sheave 61 of the main hook 6. On the other hand, the auxiliary hook 7 is attached to the upper sheave 22 of the boom tip 21 and the bracket 27 on the front surface of the boom tip as shown in FIG. 8 by the auxiliary wire rope 19 fed out from the auxiliary winch 17 in the jib retracted state. It is suspended through a sheave 28. The auxiliary hook 7 may be used by being suspended from the sheave 28 of the bracket 27 attached to the boom tip 21 even in a crane operation not using the jib 3.
[0005]
The boom tip 21 is provided with a hook storage device for automatically storing the main hook 6 and the auxiliary hook 7 on the lower surface side of the boom when the hook is wound (when each winch is fully wound). In the hook storage device on the main hook 6 side, the main hook storage fitting 4 is pivotally supported by the support shaft 41 at the lower end portion of the boom tip 21 so as to be swingable back and forth. The main hook housing 4 is configured by attaching a bottom plate 43 to the lower part of the left and right side plates 42. In the hook storage device on the auxiliary hook 7 side, the auxiliary hook storage bracket 5 is pivotally supported by the support shaft 51 at the lower end portion of the bracket 27 on the front end of the boom so as to be swingable back and forth. The auxiliary hook housing 5 is also constructed by attaching a bottom plate 53 to the lower part of the left and right side plates 52.
[0006]
Each hook storage device functions as follows. That is, for example, on the main hook 6 side, when the main hook 6 hung downward is wound up, the main hook upper surface 62 comes into contact with the lower surface of the bottom plate 43 of the main hook housing 4 (reference numeral 6 ″ in FIG. 8). When the main winch 16 is further wound from the state), the contact portion between the main hook upper surface 62 and the bottom plate 43 lower surface of the main hook housing 4 is eccentric to the rear side from the support shaft 41, so that the main hook 6 is The two members are arcuately displaced (stored) rearwardly as indicated by reference numerals 4 'and 6' while being joined to the hook storage fitting 4. Also on the auxiliary hook 7 side, the auxiliary winch is also stored. 17, after the upper surface 72 of the auxiliary hook 7 comes into contact with the lower surface of the bottom plate 53 of the auxiliary hook housing 5, the auxiliary hook housing 5 and the auxiliary hook 7 rotate backward as shown in FIG. 7. Stored in a displaced state.
[0007]
By the way, the support shaft 41 that pivotally supports the main hook housing 4 is oriented in a direction perpendicular to the boom axis A in a plan view, and the length of the shaft 41 when the main hook housing 4 is suspended. The direction axis is oriented vertically. When the main hook storage bracket 4 swings back and forth between the hanging position and the storage position, the axis of the main hook storage bracket 4 is displaced in a parallel state (overlapping state) with the boom axis A in plan view. It becomes like this.
[0008]
[Problems to be solved by the invention]
However, in a crane vehicle with a jib in which the jib 3 is stored along the lower surface of the boom with the inclination angle θ, the main hook storage bracket 4 is parallel to the boom axis A in plan view as in the conventional example shown in FIG. In the hook storage device that swings, when the main hook storage bracket 4 and the main hook 6 are stored, a part of the main hook 6 (the portion 6a in FIG. 9) is one main pillar 31 of the jib 3. Alternatively, the tension rod 35 is polymerized from below. Thus, when a part 6a of the main hook 6 overlaps with the member (main column 31 or tension rod 35) of the jib 3 from below in the hook retracted state, as shown in FIGS. Can only be tilted rearward and up to the position just before the abutment with the jib 3, so that the height position of the main hook 6 in the retracted state is lowered. In particular, the auxiliary hook 7 is positioned further below the main hook storage position in the storage state. Thus, if the height position of the hooks 6 and 7 in the retracted state becomes too low, the hooks 6 and 7 may collide with obstacles during traveling of the crane truck. For this reason, when the conventional hook storage device is applied to an undercarriage-type crane with a jib, in order to prevent the hook height position in the hook storage state from becoming too low, the expansion and contraction in the traveling state is performed. For example, as shown in FIG. 7, the height of the boom 2 is made slightly higher (for example, about an angle of 2 °) than the horizontal posture.
[0009]
However, when the telescopic boom 2 is at a high position as in the conventional example shown in FIG. 7, the center of gravity of the entire crane vehicle is at a high position, and the stability during traveling deteriorates. There was a problem that the left field of view narrowed.
[0010]
In view of the above-described problems of the conventional hook storage device, the present invention has a boom mounting height by allowing the hook to be stored closer to the lower surface of the boom in a crane vehicle with a jib. It is an object of the present invention to provide a hook storage device that can reduce the height of the hook.
[0011]
[Means for Solving the Problems]
The present invention has the following configuration as means for solving the above problems.
[0012]
The invention of the present application has two claims, claim 1 and claim 2. First, the configuration common to both claims will be described. The hook storage device of each claim of the present application is added to the tip of the boom. This is applied to a crane truck with a jib that can store the jib along the bottom surface of the boom. The hook storage bracket is pivotally supported by a pivot at the lower end of the boom tip so that it can swing back and forth. The hook can be stored along the lower surface of the boom together with the hook storage bracket at the time of winding (maximum winding).
[0013]
By the way, in a crane vehicle with a jib, it has a main hook suspended from the tip of the boom and an auxiliary hook suspended from the tip of the jib when the jib is used. The main hook is hung from the tip of the boom, and the main hook housing is a hook housing.
[0014]
The jib used in the crane vehicle with a jib in each claim of the present application is installed such that the jib axis is inclined by a predetermined angle with respect to the boom axis in a plan view in the jib retracted posture. The reason for tilting the jib axis with respect to the boom axis when the jib is stored on the lower surface of the boom is to prevent the jib tip from interfering with the hoisting cylinder when the boom hoisting cylinder is at the center of the boom lower surface. In addition, if the sheave block at the tip of the jib is large, the sheave block is positioned further outward than the side surface of the boom. The tilt angle between the jib axis and the boom axis in the retracted state may be about 4 °, for example, depending on the length of the jib.
[0015]
On the base end side of the jib, a space for accommodating the hook storage fitting and the hook is formed between the left and right main pillars of the jib. This space portion has such a large width that the space between the main column base end portions can be straddled across the left and right side surfaces of the boom tip end portion. In addition, if it is going to take the space | interval of this space part large, the width | variety of the whole jib will become large and the inconvenience that the protrusion width | variety from a boom side surface will become large in a jib storing state arises. The left and right widths of the hook storage fitting and the hook are each smaller than the space between the space portions on the jib base end side.
[0016]
In the hook storage device according to the first aspect of the present invention, the support shaft pivotally supporting the hook storage metal fitting is attached in a direction substantially perpendicular to the axis of the jib in the storage posture in plan view. In other words, the support shaft is inclined with respect to a horizontal perpendicular direction line with respect to the boom axis in a plan view by substantially the same angle as an angle at which the jib axis is inclined with respect to the boom axis (for example, about 4 °). Yes. In this way, when the support shaft of the hook storage bracket is tilted with respect to the boom axis, when the hook storage bracket swings back and forth, the axis in the length direction of the hook storage bracket is in the retracted state in plan view. Parallel to the axis of Accordingly, in the retracted state of the hook storage bracket and the hook, the hook storage bracket and the hook are accommodated in the space portion on the base end side of the jib without colliding with the jib in the retracted state. The metal fitting and the hook can be brought as close to the lower surface of the boom as possible.
[0017]
As described above, when the hook storage bracket and the hook can be brought close to the lower surface of the boom in the storage state, the storage position of the hook storage bracket and the hook becomes a high position, and accordingly, the mounting height of the boom can be lowered. Become.
[0018]
In the hook storage device according to the second aspect of the present invention, the support shaft of the hook storage bracket is attached in a direction perpendicular to the boom axis in plan view. The hook storage bracket is the length of the hook storage bracket in the storage position. It is installed in a posture in which the direction axis is inclined to the jib inclination side by substantially the same angle as the inclination angle of the jib axis with respect to the boom axis.
[0019]
In the hook storage device according to the second aspect, the support shaft of the hook storage bracket is oriented in a direction perpendicular to the boom axis as in the conventional example. (Axis in the length direction) is parallel (overlapped) to the axis of the jib in the retracted state. Therefore, in the hook storage device according to claim 2, the hook storage bracket and the hook can be accommodated in the space on the base end side of the jib without colliding with the jib in the storage state. The hook can be as close to the lower surface of the boom as possible. In the hook storage device according to claim 2, in the posture in which the hook storage bracket is suspended in a free state, when the bracket axis is viewed from the front side of the boom, the axis of the jib in the storage posture is the boom axis. On the other hand, it tilts toward the jib tilt side by substantially the same angle as the tilt angle.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present application will be described below with reference to FIGS. 1 to 6. FIGS. 1 to 4 show a first embodiment corresponding to claim 1 of the present application, and FIGS. A second embodiment corresponding to item 2 is shown.
[0021]
First, a description will be given of a crane vehicle with a jib to which the hook storage device of each embodiment of the present application is applied. The crane vehicle with a jib in this embodiment is provided with a swivel base 11 on a vehicle 1, and the telescopic boom is provided on the swivel base 11. 2 and the operator's cab 12 are attached, and the jib 3 used by being added to the boom tip 21 can be stored along the lower surface of the telescopic boom 2.
[0022]
As shown in FIG. 3, the telescopic boom 2 is raised and lowered by two right and left raising and lowering cylinders 13 and 13. Each of the hoisting cylinders 13 and 13 has the lower end of the cylinder pivoted to a position closer to the front of the swivel 11 on the left and right sides of the telescopic boom 2 (base end boom), and the upper end of the cylinder is tilted upward and rearward. In this state, the upper end of the cylinder is pivotally attached to the upper part of the proximal boom. In this way, the space for installing the hoisting cylinder 13 is not required on the lower surface side of the telescopic boom 2, and the mounting height of the telescopic boom 2 can be made lower than that of the conventional example shown in FIG. .
[0023]
The jib 3 is configured by connecting the left and right main pillars 31 and 31 with connecting members 32 and 32 and attaching a sheave block 34 to the tip of the jib. In the retracted state of the jib 3, the jib base end portion (base end portion of each main column 31, 31) is a support shaft (also used as a sheave shaft) that is provided laterally on the boom front end portion 21. (Also referred to as a sheave shaft) and is supported by two front and rear support portions 36 and 37 along the bottom surface of the boom. Further, the jib 3 can be swung left and right by a slight angle in a state along the bottom surface of the boom. Then, the jib 3 is such that the jib axis B as shown in FIG. 3 is stored in a state of being inclined with respect to the boom axis A predetermined small angle theta (theta = about 4 °) only in a plan view in the jib retracted state It has become. The reason why the jib 3 is stored in an inclined state with respect to the telescopic boom 2 is that the sheave block 34 at the tip of the jib (the vertical height is larger than the thickness of the main pillar 31 portion) is positioned outward from the side of the boom. This is because the main pillar 31 of the jib 3 can be stored closer to the lower surface of the boom. Further, tension rods 35, 35 used when the jib is used are stored on the lower surface of the jib 3 in the retracted posture.
[0024]
3 is a lower surface equivalent view of the telescopic boom 2 and the jib 3 portion in FIG. 1. In FIG. 3, the bracket 27, the auxiliary hook storage bracket 5, and the auxiliary hook 7 to be described later are omitted. ing.
[0025]
On the base end side of the jib 3, a space 33 is formed between the left and right main pillars 31, 31 of the jib 3 so that the main hook housing 4 and the main hook 6 can be accommodated. The space 33 has such a large width that the space between the main column base end portions can extend over the left and right side surfaces of the boom tip end portion 21. In addition, if it is going to take the space | interval of this space part 33 large, the width | variety of the whole jib 3 will become large, and the problem that the protrusion width | variety from a boom side surface will become large in a jib storing state arises. Needless to say, the left and right widths of the main hook housing 4 and the main hook 6 are smaller than the interval of the space 33 on the jib base end side.
[0026]
The crane vehicle with a jib has a main hook 6 suspended from the boom tip 21 and an auxiliary hook 7 suspended from a sheave 34a provided at the tip of the jib 3 when the jib 3 is used. ing.
[0027]
The main hook 6 is suspended by the main wire rope 18 fed from the main winch 16 via the upper sheave 22 and the lower sheave 24 of the boom tip 21 as shown in FIG. The main wire rope 18 is wound a plurality of times between the lower sheave 24 of the boom tip 21 and the sheave 61 of the main hook 6.
[0028]
The auxiliary hook 7 is suspended by an auxiliary wire rope 19 fed from the auxiliary winch 17 via a sheave 28 attached to an upper sheave 22 of the boom tip 21 and a bracket 27 on the front surface of the boom tip as shown in FIG. It has been. The auxiliary hook 7 may be hung from the sheave 28 of the bracket 27 even in a crane operation without using the jib 3.
[0029]
The boom tip 21 is provided with a hook storage device for automatically storing the main hook 6 and the auxiliary hook 7 on the lower surface side of the boom when the hook is wound (when each winch is fully wound).
[0030]
In the hook storage device on the main hook 6 side, the main hook storage fitting 4 is pivotally supported by the support shaft 41 at the lower end portion of the boom tip 21 so as to be swingable back and forth. The main hook housing 4 is configured by attaching a bottom plate 43 to the lower part of the left and right side plates 42, 42. Further, the pivotal support position of the main hook housing 4 by the support shaft 41 is located in front of the sheave shaft 23.
[0031]
In the hook storage device on the auxiliary hook 7 side, the auxiliary hook storage metal fitting 5 is pivotally supported by the support shaft 51 at the lower end portion of the bracket 27 (located at the lower front portion of the boom tip) so as to be swingable back and forth. The auxiliary hook housing 5 is configured by attaching a bottom plate 53 to the lower part of the left and right side plates 52.
[0032]
Each hook storage device functions as follows. That is, for example, on the main hook 6 side, when the main hook 6 suspended downward is wound up, the main hook upper surface 62 comes into contact with the lower surface of the bottom plate 43 of the main hook housing 4 (reference numeral 6 ″ in FIG. 2). When the main winch 16 is further wound from the state), the contact portion between the main hook upper surface 62 and the bottom plate 43 lower surface of the main hook housing 4 is eccentric to the rear side from the support shaft 41, so that the main hook 6 is The two members are arcuately displaced (stored) rearwardly as indicated by reference numerals 4 'and 6' while being joined to the hook storage fitting 4. Also on the auxiliary hook 7 side, the auxiliary winch is also stored. 17, after the upper surface 72 of the auxiliary hook 7 comes into contact with the lower surface of the bottom plate 53 of the auxiliary hook housing 5, the auxiliary hook 7 is stored in a state of being arcuately displaced rearward as shown in FIG. 1.
[0033]
Note that the hook storage device described in each claim of the present application is directed to the main hook 6 side, and the main hook 6 of the embodiment of the present application corresponds to the hook of each of the claims. The hook storage bracket 4 corresponds to the hook storage bracket of each claim.
[0034]
Hereinafter, individual embodiments will be described. In the hook storage device of the first embodiment (corresponding to claim 1) shown in FIGS. 1 to 4, the main hook storage bracket 4 is pivoted as shown in FIGS. The supporting shaft 41 (supporting shaft axis C) is attached in a substantially perpendicular direction to the axis B of the jib 3 in the retracted position in plan view. In other words, the support shaft 41 has an angle θ (the angle at which the jib axis B is inclined with respect to the boom axis A with respect to a horizontal perpendicular line (for example, the axis of the sheave shaft 23) with respect to the boom axis A in plan view. For example, it is inclined by substantially the same angle as 4 °. As described above, when the support shaft 41 of the main hook housing 4 is obliquely crossed with respect to the boom axis A, the length of the main hook housing 4 in plan view when the main hook housing 4 swings back and forth. The direction axis D is parallel (overlapping) with the axis B of the jib in the retracted state. Therefore, when the main hook 6 is wound off and the main hook storage bracket 4 and the main hook 6 are stored on the lower side of the boom, the main hook storage bracket 4 and the main hook 6 are denoted by reference numerals 4 and 4 in FIGS. As indicated by ′, 6 ′, it is accommodated in the proximal end side space portion 33 of the jib 3 in the retracted state without interfering with the main pillar 31 and the tension rod 35. In this manner, when the main hook storage bracket 4 and the main hook 6 are stored, when the members 4 and 6 are accommodated in the proximal end side space 33 of the jib 3 in the storage state, the main hook storage bracket 4 and the main hook 6 can be brought as close to the lower surface of the boom as possible. Further, as shown in FIG. 1, the auxiliary hook storage fitting 5 and the auxiliary hook 7 are stored close to the lower portions of the main hook storage fitting 4 and the main hook 6 stored previously.
[0035]
Therefore, in the case where this hook storage device is adopted, the main hook storage bracket 4 and the main hook 6 are placed in the proximal end side space portion 33 of the jib 3 when the hook storage brackets 4 and 6 and the hooks 6 and 7 are stored. The auxiliary hook storage bracket 5 and the auxiliary hook 7 on the lower side can be positioned at a higher position by the amount accommodated. This makes it possible to position the telescopic boom 2 further below the conventional one. In the embodiment of the present invention shown in FIG. 1, in the retracted state of the telescopic boom 2, the boom is tilted to a substantially horizontal posture and is positioned further below that of the conventional example of FIG. When the telescopic boom 2 is positioned downward in this way, the center of gravity of the entire crane vehicle is lowered, the running stability is improved, and the left view from the cab 12 is widened during running. .
[0036]
In the hook storage device of the second embodiment (corresponding to claim 2) shown in FIG. 5 and FIG. 6, the support shaft 41 (support shaft axis C ′) that pivotally supports the main hook storage fitting 4 is used in the conventional example. As in the case, it is attached in parallel with the sheave shaft 23. That is, the axis C ′ of the support shaft 41 is oriented horizontally as shown in FIG. 6 and in a direction perpendicular to the boom axis A as shown in FIG.
[0037]
On the other hand, the main hook storage bracket 4 has a posture in which the axis D in the length direction of the hook storage bracket 4 is tilted to the jib tilt side by substantially the same angle as the tilt angle θ of the jib axis B with respect to the boom axis A in the retracted posture. It is installed in. That is, in the hook storage device of the second embodiment, in the storage posture of the main hook storage metal fitting 4, the metal fitting axis D is parallel (overlapped) with the axis B of the jib 3 in the storage state. Further, when the main hook storage bracket 4 is in a free-hanging posture as shown in FIG. 6, when the bracket axis D (axis in the hook storage bracket length direction) is viewed from the front side of the boom, With respect to the vertical line E, the axis B of the jib 3 in the retracted posture is inclined toward the jib inclined side by substantially the same angle as the inclination angle θ formed with respect to the boom axis A. Note that the bottom plate 43 of the main hook housing 4 is inclined with respect to the horizontal plane by the same angle as the inclination angle θ in the suspended state shown in FIG. That is, the bottom plate 43 is a surface perpendicular to the metal fitting axis D.
[0038]
In the hook storage device according to the second embodiment, as shown in FIG. 6, the main winch is hoisted from the state in which the main hook 6 is suspended, and the main hook 6 is stored as indicated by reference numeral 6 ″. When abutting against the bottom plate 43 of the metal fitting 4, the axis of the main hook 6 ″ is parallel to the metal fitting axis D. Further, when the main winch is further wound up, the main hook storage bracket 4 and the main hook 6 are arcuately displaced rearward in a state where they are aligned on a straight line, and finally indicated by reference numerals 4 'and 6' in FIG. As described above, the main hook storage fitting and the main hook are accommodated in the space 33 on the base end side of the jib without contacting the main column 31 or the tension rod 35 of the jib 3 in the retracted state.
[0039]
Accordingly, even in the hook storage device of the second embodiment, when the main hook storage bracket 4 and the main hook 6 are stored, they can be brought as close as possible to the lower surface of the boom. Similarly, the main hook storage bracket 4 and the main hook 6 can be stored in a high position (the auxiliary hook storage bracket and the auxiliary hook can also be stored in a high position), and accordingly, the mounting height of the telescopic boom 2 can be reduced.
[0040]
In each of the above embodiments, the auxiliary hook 7 is also stored on the lower surface side of the boom by using the auxiliary hook storage bracket 5, but in the present invention, only the main hook 6 is stored on the lower surface side of the boom. It can also be applied to
[0041]
【The invention's effect】
In the hook storage device according to the claims of the present application, when the jib 3 is stored along the bottom surface of the boom, when the hook storage bracket 4 and the hook 6 are stored on the bottom surface side of the boom, the hook storage bracket 4 and the hook 6 is accommodated in the space 33 formed on the base end side of the jib. Accordingly, in the retracted state of the hook storage bracket 4 and the hook 6, they can be brought as close to the lower surface of the boom as possible, so that the boom 2 can be positioned further downward than the conventional one. is there. When the boom 2 is mounted in the low position in this way, the center of gravity of the crane truck as a whole is lowered, the stability during traveling is improved, and the left view from the cab 12 is widened during traveling.
[Brief description of the drawings]
FIG. 1 is a side view of a crane vehicle with a jib to which a hook storage device according to a first embodiment of the present application is applied.
FIG. 2 is an operation explanatory diagram of the hook storage device of FIG. 1;
3 is a bottom view of a telescopic boom and a jib portion in the crane truck of FIG. 1. FIG.
4 is a partially enlarged view of FIG. 3;
FIG. 5 is a view corresponding to FIG. 4 to which the hook storage device according to the second embodiment of the present application is applied.
6 is a view of the hook storage device of FIG. 5 as viewed from the front side of the boom. FIG.
FIG. 7 is a side view of a conventional crane vehicle with a jib.
8 is an operation explanatory view of a hook storage device used in the crane vehicle with a jib in FIG. 7; FIG.
9 is a bottom view of the telescopic boom and jib portion in the crane truck of FIG. 7. FIG.
[Explanation of symbols]
1 is a vehicle, 2 is a boom (expandable boom), 3 is a jib, 4 is a hook storage bracket (main hook storage bracket), 5 is an auxiliary hook storage bracket, 6 is a hook (main hook), 7 is an auxiliary hook, 21 is Boom tip, 31 is a main pillar, 33 is a space, 41 is a support shaft, 43 is a bottom plate, 62 is a hook top surface, A is a boom axis, B is a jib axis, and θ is an angle formed by the boom axis and the jib axis. .

Claims (2)

In a crane vehicle with a jib that can store the jib (3) to be added to the boom tip (21) along the lower surface of the boom, the hook is stored at the lower end of the boom tip (21) by a support shaft (41). A hook that pivotally supports the metal fitting (4) so that it can swing back and forth, and that the hook (6) can be stored along with the hook storage metal fitting (4) along the lower surface of the boom when the hook (6) is wound. A storage device,
The jib (3) is installed so that the jib axis (B) is inclined by a predetermined angle (θ) with respect to the boom axis (A) in plan view in the jib retracted posture,
On the base end side of the jib (3), a space (33) is formed between the left and right main pillars (31, 31) of the jib so as to accommodate the hook storage bracket (4) and the hook (6). And
The support shaft (41) of the hook storage fitting (4) was attached in a direction substantially perpendicular to the axis (B) of the jib (3) in the storage position in plan view.
A hook storage device for a crane vehicle with a jib. In a crane vehicle with a jib that can store the jib (3) to be added to the boom tip (21) along the lower surface of the boom, the hook is stored at the lower end of the boom tip (21) by a support shaft (41). A hook that pivotally supports the metal fitting (4) so that it can swing back and forth, and that the hook (6) can be stored along with the hook storage metal fitting (4) along the lower surface of the boom when the hook (6) is wound. A storage device,
The jib (3) is installed so that the jib axis (B) is inclined by a predetermined angle (θ) with respect to the boom axis (A) in plan view in the jib retracted posture,
On the base end side of the jib (3), a space (33) is formed between the left and right main pillars (31, 31) of the jib so as to accommodate the hook storage bracket (4) and the hook (6). And
While attaching the support shaft (41) of the hook storage bracket (4) in a direction perpendicular to the boom axis (A) in plan view,
In the retracted posture of the hook storage bracket (4), the longitudinal axis (D) of the hook storage bracket (4) is the angle of inclination (θ) of the jib axis (B) with respect to the boom axis (A). Installed in a posture that inclines to the jib inclined side by approximately the same angle,
A hook storage device for a crane vehicle with a jib.

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