JP7164445B2 - Crane vehicle boom head mechanism - Google Patents

Description

TECHNICAL FIELD The present invention relates to a boom head mechanism installed at the tip of a boom of a crane vehicle, and more particularly to a boom head mechanism of a crane vehicle, which is constructed such that a jib connected and held to the boom head portion is swung out and used during work. .

Conventionally, as shown in FIG. 7, for example, a crane vehicle has a boom 100 mounted on a crane vehicle body 110, an arm-shaped jib 107 pivoted downward from the tip of the boom 100, A boom head mechanism 109 is provided for pivoting and holding the arm-shaped jib 107 with respect to the boom 100 so as to be rotatable up and down.

The main parts of the boom head mechanism 109 are, as shown in FIG. and an auxiliary winding wire support unit 106 directly related to the operation at the time of swinging out.

Among them, the main hoisting wire support units 103 are pivoted on both sides of the tip of the boom 100 so as to sandwich the boom 100 from the width direction within the swing plane of the boom 100 (inside the plane of FIG. 7A). It is composed of a hoisting winch side guide sheave (hereinafter referred to as "main hoisting guide sheave") 101 and a main hoisting wire top sheave (hereinafter referred to as "main hoisting top sheave") 102, and each of these sheaves (wire pulley) ) 101 and 102 are stretched with a main hoist wire 111 that is wound/rewound by a main hoist winch (not shown) disposed on the crane vehicle main body 110 side.

The auxiliary winding wire support units 106 are pivotally mounted on both sides of the tip of the boom 100 so as to sandwich the boom 100 from the width direction within the swing plane of the boom 100 (inside the plane of FIG. 7A). It is composed of a winch-side guide sheave (hereinafter referred to as a "compound guide sheave") 104 and an auxiliary winding wire top sheave (hereinafter referred to as a "compound top sheave") 105, and each of these sheaves (wire pulley) 104 , 105 is stretched with an auxiliary hoisting wire 112 that is wound/rewound by an auxiliary hoisting winch (not shown) disposed on the crane vehicle main body 110 side.

In this case, the auxiliary hoisting guide sheave 104 is arranged at the tip of the boom 100 coaxially with the main hoisting guide sheave 101 and offset in the thickness direction of FIG. installed and equipped.

When the crane truck itself is in operation, the crane truck is first operated in its entirety according to the procedure shown in FIGS. The jib 107 and the boom 100 are configured to be integrally connected by being pulled out and pivotally attached to the boom head mechanism 109 at its tip.

Next, another conventional example is shown in FIGS.
In the conventional example disclosed in FIG. 7, the main hoisting guide sheave 101 and the auxiliary hoisting guide sheave 104 are coaxially offset from each other at the tip of the boom 100. In another conventional example shown in FIGS. 8A and 8B, a main hoisting guide sheave 201 and an auxiliary hoisting guide sheave 204 are independently supported by different spindles, and these support a boom. They are arranged and equipped in the head mechanism 209 so as to cooperate with each other, and their individual operations are ensured without interfering with each other.

Here, FIG. 8A shows a schematic side view of the boom head mechanism 209 described above when the other side plate 502 of the side plates 501 and 502 is removed. Also, FIG. 8B shows a schematic plan view of FIG. 8A with the other side plate 502 attached.
Further, reference numeral 202 denotes a main hoisting top sheave provided corresponding to the main hoisting guide sheave 201 . Reference numeral 205 denotes an auxiliary winding top sheave provided corresponding to the auxiliary winding guide sheave 204 .

Here, the main winding wire support unit 203 is constituted by the main winding guide sheave 201 and the main winding top sheave 202, and the compound wire supporting unit 203 is constituted by the compound winding guide sheave 204 and the compound winding top sheave 205. A unit 206 is constructed.
Other configurations are the same as the conventional example shown in FIG.

In the other conventional example shown in FIG. 8, a single wire rope is mainly used for the auxiliary winding wire support unit 206, and the auxiliary winding guide sheave 204 and the auxiliary winding guide sheave 204 that constitute the auxiliary winding wire support unit 206 As shown in FIG. 8B, the top sheave 205 is arranged in the center of the width of the boom head area, thereby maintaining the balance of the entire device during use and maintaining a stable operating state. It's like

JP 2003-267664 A

In the other conventional example shown in FIG. 8, the main winding wire support unit 203 is actually used for multiple wire ropes, so that it is arranged to be either left or right. .
Therefore, in the space between the support shafts of the main hoisting guide sheave 201 and the auxiliary hoisting guide sheave 204, deviation occurs as indicated by symbols P and Q in FIG. 8(B).

That is, in the space P on the side where the main hoisting guide sheave 201 is not disposed between the spindles of the main hoisting guide sheaves 201 and 202 and the auxiliary hoisting guide sheaves 204 and 205, the main hoisting wire rope can be accommodated with the rope socket attached. While there is enough room to pass through, in the space Q area on the side where the main winding guide sheave 201 is arranged, the space between the main winding guide sheave 201 and the auxiliary winding guide sheave 204 cannot be sufficiently secured. It's becoming

Therefore, the main hoisting wire rope can be directly inserted from the top surface of the boom head toward the main hoisting wire rope with a rope socket, or the main hoisting wire rope can be laterally moved from the side of the main hoisting guide sheave 201 and hung on the main hoisting guide sheave 201 . There was an inconvenience that it could not be turned and neither could be executed.

On the other hand, in order to improve such an inconvenience, for example, by moving the main hoisting guide sheave 201 closer to one side plate 501 to secure a gap between the main hoisting guide sheave 201 and the auxiliary hoisting guide sheave 204, it is possible to pass through this gap. The main hoisting wire rope can be hung around the main hoisting guide sheave 201 .

However, when the main hoisting guide sheave 201 is moved toward the one side plate 501, the force acting from the main hoisting guide sheave 201 to the one side plate 501 increases. Therefore, there arises a problem that the strength of the side plate (for example, the one side plate 501) on the side of the main hoist guide sheave 201 cannot be maintained.

Furthermore, in this case, if the side plates 501 and 502 are made thicker to increase the strength, the above inconvenience can be improved. Considering the whole, there arises a problem that the lifting performance of the crane truck is lowered.

Therefore, in this proposal, the weight increase of the boom head is suppressed to a necessary minimum, and a gap is secured between the main hoisting guide sheave and the auxiliary hoisting guide sheave, and the main hoisting wire rope is hung around the main hoisting guide sheave ( It is an object of the present invention to provide a boom head mechanism for a crane vehicle that can improve the efficiency of preparatory work for operation.

This proposal proposes a boom head mechanism for a crane vehicle in which the auxiliary hoisting guide sheave is arranged at the tip of the boom in the longitudinal direction of the mounting position of the main hoisting guide sheave. A gap is secured between the hoisting guide sheave and the auxiliary hoisting guide sheave arranged at the width center of the boom head, and the main hoisting wire rope can be hung around the main hoisting guide sheave through the gap.

At that time, in order to increase the strength of the side plate on the side of the main hoisting guide sheave, a boomerang-shaped reinforcing patch is fixed around the center of the shaft of the auxiliary hoisting guide sheave. In this case, reinforcing ribs are provided on the inner sides of the upper portions of the side plates corresponding to the wing tip portions of the reinforcing patches.
As a result, the boom run-shaped reinforcing patch and the reinforcing ribs on the upper part of the side plate are integrated so as to be connected to each other on the front and back sides of the boom head side plate.

Further, the upper end of the boomerang-shaped reinforcing patch is provided with a boss rib protruding outward so as to extend over the boss for the auxiliary winding guide shaft. so that the force acting on the side plate at the center of the main hoisting guide sheave shaft on the main hoisting guide sheave side can be transferred to the center of the auxiliary hoisting guide sheave shaft, thereby dispersing the force. It's becoming

Since the boom head mechanism of the crane vehicle according to the present proposal is configured as described above, according to this, the auxiliary hoisting guide sheave is arranged at the tip in the longitudinal direction of the boom from the mounting position of the main hoisting guide sheave, and the main By moving the hoisting guide sheave closer to the boom head side plate, it is possible to secure a gap between the main hoisting guide sheave and the auxiliary hoisting guide sheave arranged at the center of the width of the boom head. Through this gap, the main hoisting guide sheave can be hoisted. This allows the main hoisting wire rope to be hoisted around the main hoisting guide sheave from the outside even with the rope socket attached. Therefore, it is possible to provide an excellent boom head mechanism for a crane vehicle that has not been available in the past, which can improve the efficiency of the work of winding the main hoist wire rope.

Furthermore, according to this proposal, a reinforcing rib is provided on the inner upper portion of each side plate, and a boss rib is provided in the support shaft region of the auxiliary winding guide sheave on the outer upper portion of each side plate. It is possible to effectively maintain the strength of the side plate without setting a large thickness.

Also, a boomerang-shaped patch may be attached to the support shaft region of the auxiliary winding guide sheave on the outer upper portion of each of the side plates.
By doing so, it is possible to strengthen the boom head mechanism as a whole without configuring each side plate with a thick member.

It is a perspective view showing one embodiment of a boom head mechanism concerning this proposal. FIG. 2A is a perspective view showing the main body of the boom head mechanism disclosed in FIG. 1, and FIG. FIG. 4 is a plan view showing a patch member (boommerang patch) as a partial reinforcing member; It is a figure which shows the boom head mechanism disclosed in FIG. 1, FIG.3(A) is a front view seen from the arrow A direction of FIG. 1, FIG.3(B) is a schematic plan view of FIG.3(A). Explanatory diagrams showing the work procedure for passing the wire rope in the boom head mechanism disclosed in FIG. 1, FIG. 4A is an explanatory diagram showing the position where the rope is passed, and FIG. FIG. 10 is an explanatory view showing a situation in which the main hoist guide sheave is stretched over (engaged with) the main hoist guide sheave. FIG. 3 is an explanatory diagram showing a part of the overall work procedure when attaching wires in the boom head mechanism disclosed in FIG. 2 ; FIG. 6 is a clear diagram showing a continuation of the work procedure at the time of wire attachment disclosed in FIG. 5; It is explanatory drawing which shows the whole operation|movement of the crane vehicle in a conventional example. FIG. 11 is an explanatory diagram showing a boom head mechanism portion of a crane vehicle in another conventional example;

An embodiment of a boom head mechanism for a crane vehicle according to the present invention will be described below with reference to FIGS. 1 to 6. FIG.

(configuration, action)
In FIG. 1, reference numeral 100 denotes a crane vehicle boom, and reference numeral 9 denotes a boom head mechanism. The boom head mechanism 9 is provided at the tip of the boom 100 described above, and has a function of suspending and holding a working jib (identical to reference numeral 107 in the conventional example of FIG. 7 described above).

As shown in FIG. 1, the boom head mechanism 9 has one side plate 501 and the other side plate 502 facing each other. The side plates 501 and 502 are the same as the side plates 501 and 502 in the other conventional example described above.

Between the side plates 501 and 502, a main hoisting wire support unit 3 composed of a main hoisting guide sheave 1 and a main hoisting top sheave 2, which are vertically separated, is also arranged vertically. Auxiliary winding wire support units 6 each comprising an auxiliary winding guide sheave 4 and an auxiliary winding top sheave 5 are provided, and as shown in FIG. It is pivotally supported by plates 501 and 502 .

The main hoisting guide sheave 1, the main hoisting top sheave 2, the auxiliary hoisting guide sheave 4 and the auxiliary hoisting top sheave 5 are used, for example, to hold a rope for engaging and transporting work materials at a construction site. , each functioning as a pair of rope-holding pulleys.
Reference numeral 8 indicates a jib pivot pin mounted on the center shaft of the main hoist top sheave 2 .
This jib pivot pin 8 is for pivoting a jib (not shown) equivalent to the jib 107 disclosed in the above-mentioned conventional example.

In this case, in the present embodiment, the auxiliary hoisting wire support unit 6 is arranged outside the attachment position of the main hoisting wire support unit 3 (on the tip side in the longitudinal direction of the boom 100).
Further, the auxiliary hoisting wire support unit 6 is disposed in the central region of the boom 100 in the width direction, and the main hoisting guide sheave 1 of the main hoisting wire support unit 3 is arranged on one side plate of the boom 100 in the width direction. 501 is equipped (see FIG. 3(B)).

As a result, in the main hoisting top sheave 2, a rope for materials can be hung around between the main hoisting top sheave 2 and the main hook sheave (not shown), which is sufficient for hoisting heavy materials. It is possible to Further, the auxiliary winding wire support unit 6 is arranged at an intermediate position between the one side plate 501 and the other side plate 502 as in the case of the conventional example described above, thereby balancing the entire device and stabilizing its operation. Secured.

As shown in FIGS. 2(A) and 3(B), inside the upper ends of the one and the other side plates 501 and 502, supports for the auxiliary hoisting guide sheave 4 are provided from the main hoisting guide sheave 1 side. Reinforcing ribs 11, 12 are fixedly provided toward the shaft portion.
The reinforcing ribs 11 and 12 are provided with tapered portions 11A and 12A at their tip portions (tip portions near the auxiliary winding guide sheave 4 side) as shown in FIG. The side plates 501 and 502 are substantially reinforced so that they can effectively absorb impacts from the outside.

In addition, on the outer surfaces of the upper ends of the side plates 501 and 502 on the other side, there is a boom-merang shape in the region of the above-mentioned auxiliary winding wire support unit 6, and the tip of the wing is tapered from the reinforcing ribs 11 and 12 on the top of the boom head side plate. Patch members (boommerang-shaped patches) 13 and 14 are arranged in a bonded form corresponding to the portions 11A and 12A. As a result, the front and back surfaces of the side plate 501 and the side plate 502 are integrated so as to be strongly connected.

Numerals 15 and 16 indicate bosses for the auxiliary winding guide sheave 4 . In addition, boss ribs 17 and 18 are provided at the upper end portions of the side plates 501 and 502 so as to abut and protect the auxiliary winding guide sheave bosses 15 and 16 on the upper side. 501 and 502 are further strengthened.

As a result, the support shaft portions of the main hoisting guide sheave 1 and the auxiliary hoisting guide sheave 4 at the upper ends of the one and the other side plates 501 and 502 are sufficiently strengthened.
That is, by configuring in this way, the upper end portions of the side plates 501 and 502 can be adjusted without increasing the thickness of the one and the other side plates 501 and 502 (that is, without increasing the thickness of the entire side plates 501 and 502). is strengthened, and the main hoisting guide sheave 1 and the auxiliary hoisting guide sheave 4 can sufficiently cope with the vibration load during operation for a long period of time, and the stability of operation is ensured in this respect. .

Further, between the rotating surfaces of the main hoisting guide sheave 1 and the auxiliary hoisting guide sheave 4 held by the one side plate 501 and the other side plate 502, there is a material retaining material wound around the main hoisting guide sheave 1. A gap SK is provided for lateral movement of the wire rope (see FIGS. 3(B) and 4(B)).
4(A) and 4(B) show an example of the arrangement of the main hoisting guide sheave 1 and the auxiliary hoisting guide sheave 4 including the gap SK in the present invention.

As shown in FIGS. 4(A) and 4(B), the space P surrounded by the one and the other side plates 501 and 502 has a vertical space PK necessary for the wire rope 211 with the socket to pass through. , is formed on the side plate 502 located on the opposite side of the main hoist guide sheave 1 .
The space PK on the side plate 502 side does not exist on the other side plate 501 side where the main hoist guide sheave 1 is positioned.

For this reason, in this embodiment, as shown in FIG. 1, the tip of the wire rope 211 with a rope socket is inserted into the space PK portion inside the side plate 502 from above, and then this is placed in FIG. ), it can be laterally moved to pass through the clearance space SK and installed on the main hoist guide sheave 1 on the side plate 501 side.

Further, in the present embodiment, reinforcing members are provided in the support shaft regions of the auxiliary winding guide sheaves 4 and 5 at the outer upper portions of the one and the other side plates 501 and 502 as shown in FIGS. 2 and 3(B). patch members (boommerang-shaped patches) 13 and 14 are integrally attached.
Therefore, in this respect as well, there is an advantage that the strength of each of the side plates 501 and 502 can be greatly enhanced without increasing the thickness of each of the side plates 501 and 502 .
Other configurations are the same as the conventional example shown in FIG.

(Wire rope installation procedure)
Next, a procedure for attaching the wire rope 211 provided in the above embodiment will be specifically described with reference to FIGS. 5 and 6. FIG.
The boom head mechanism 9 of the crane vehicle is equipped with rope stop pins 31, 32 at its upper end to prevent the wire rope from coming off due to vibration or other reasons.
For this reason, when attaching the wire rope, first, the rope stop pin 31 on the side of the main hoist guide sheave 1 is removed (see FIG. 5 (1)).

Next, the tip (lower end) of the wire rope 211 with a rope socket is inserted along the inside of the other side plate 502 of the boom head mechanism 9 from the upper surface of the boom 100 (see FIG. 5(2)). That is, the tip of the wire rope 211 is inserted into the hatched portion in the plan view of FIG. 5(2).

Subsequently, as shown in FIG. 6(3), the wire rope 211 is inserted into the gap SK (that is, between the main hoisting guide sheave 1 and the auxiliary hoisting guide sheave 4) while the rope socket portion at the tip remains inserted. ) is moved laterally through it, and wound around the main hoisting guide sheave 1.

The present invention has great utility value in that the operation of installing the wire rope 211 to the main hoist guide sheaves 1 and 2 can be carried out quickly and smoothly without requiring particular skill.

1 Main Hoisting Guide Sheave 2 Main Hoisting Top Sheave 4 Auxiliary Hoisting Guide Sheave 5 Auxiliary Hoisting Top Sheave 9 Boom Head Mechanism 11, 12 Reinforcing Ribs 17, 18 Boss Rib 100 Boom 211 Wire Rope 501, 502 Side Plate SK Clearance

Claims (4)

An auxiliary hoisting guide sheave and an auxiliary hoisting top sheave arranged inside upper end portions of one side plate and the other side plate and supported by the both side plates; A boom head mechanism for a crane vehicle in which a sheave and an auxiliary hoisting top sheave are arranged on the tip side in the longitudinal direction of the boom from the mounting positions of the main hoisting guide sheave and the main hoisting top sheave,
The auxiliary hoisting guide sheave is arranged in the center region in the width direction of the boom, and the main hoisting guide sheave is arranged and installed near one side plate of the boom in the width direction,
A boom head mechanism for a crane vehicle, characterized in that a clearance space is provided between the auxiliary hoisting guide sheave and the main hoisting guide sheave to enable lateral movement of a wire rope for the main hoisting guide sheave. In the boom head mechanism of the crane vehicle according to claim 1,
A boom head mechanism for a crane vehicle, wherein the clearance space is set in a space between a support shaft of the auxiliary hoisting guide sheave and a support shaft of the main hoisting guide sheave. In the crane vehicle boom head mechanism according to claim 1 or 2,
A boom head mechanism for a crane vehicle, wherein a reinforcing rib is provided on the upper inner side of each of the side plates, and a boss rib is provided on the upper outer side of each of the side plates in the support shaft area of the auxiliary winding guide sheave. In the crane vehicle boom head mechanism according to any one of claims 1 to 3,
A boom head mechanism for a crane vehicle, characterized in that a boomerang-shaped patch is attached (mounted) to a support shaft region of the auxiliary winding guide sheave on the outer upper portion of each of the side plates.

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