JP2731143B2 - Self-propelled crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention relates to a self-propelled crane.
Booms and hooks, especially for crane equipment
It is related to block improvement. [0002] 2. Description of the Related Art A self-propelled crane is generally supported by a traveling body.
Boom that rotates in a vertical plane and the tip of the boom
With a hanger attached to the wire hanging from the
To lift and lower the load suspended by the lifting device
Is done. And the lifting of the load from the horizontal reference plane of the boom
Angle (hereinafter referred to as boom angle)
The distance from the boom rotation center to the boom tip
Below, called the boom length).
Will be Also, the lifting device should be attached to the end of the boom where the wire
The lifting limit is defined as the proximity to the lower surface of the end,
The vertical distance between the vehicle and the ground, that is, the lift is
Determined by the height of the tip. [0003] In a self-propelled crane, the boom is almost vertically suspended.
Maximum head is obtained when straightened. At this time, boom
As the lifting gear approaches the boom as
Bend the tip of the system downward at a certain angle in the vertical plane,
Even if the boom is almost vertical, the clearance between the lifting device and the boom
Is to remain. [0004] However, this self-propelled
Installation of heavy objects in buildings where height is restricted by
When performing the work, the bent tip part gets in the way.
In buildings, etc., the boom should be used almost horizontally.
The boom must not touch the ceiling or other obstructions.
Even if it is raised as much as possible, the tip extends diagonally downward.
And the lift is shortened accordingly.
You. In particular, the height from the ground contact surface to the obstacle above
The load is high compared to the
If it is not possible to maintain the load, lift and move the load
Work has to be done carefully,
Is to raise the load because there is almost no work gap
A situation arises in which even impossible is possible. [0005] As described above, in crane work,
Is it desirable to secure as large a lift as possible?
However, when using the boom raised almost vertically,
Requirements, heights in places where height restrictions are strict
In some cases, it was sacrificed. The present invention
The task was to solve the problem described above.
You. [0006] Means for Solving the Problems And the gist of the present invention
Is to move the self-propelled crane in the vertical plane (a)
And (b) a vertical surface at the end of the boom.
Adjustable angle between boom and inside
Boom head and (c) the tip of the boom head.
Mounted horizontally extending boom point pins
(D) rotatably supported by the boom point pin
Multiple boom point sheaves with wide grooves
Place groove sheave and its wide groove sheave on boom point pin
With multiple narrow groove sheaves with narrow grooves sandwiched from both ends
And (e) the hook on which the load is suspended
It is supported by an extended support shaft, and a plurality of
Hook block sheave
Hook rotatably supported at the position sandwiched from the end side
Block and (f) lift the entire hook block
The boom poi
The narrow groove sheave and the support shaft at one end side of the pin
Around the hook block sheave at one end of the
It is wrapped around the wide groove sheave after being kicked, and then
Hook block sheave and boom at the other end of the support shaft
Wrap around the narrow groove sheave on the other end of the point pin
And those that are included. The boo
The boom length can be changed by expanding or contracting or bending
Fixed, and the boom length is fixed
It may be an expression type. [0007] In the self-propelled crane constructed as described above,
Is the angle between the boom and the boom head (hereinafter referred to as the boom
Adjust the head angle) as necessary. For example,
If the boom is to be used in an area with no height restrictions,
When the boom head angle is set to the maximum boom angle,
The angle at which the lifting gear does not contact the boom or boom head
And where the boom is used in height-constrained locations.
If the boom is tilted almost horizontally,
Boom head so that it is horizontal or diagonally upward
Adjust the angle. In the latter case, the workable range is limited.
And set the only angle that is best suited within that range
Well, also multiple according to different working heights within its range
May be set. In this self-propelled crane,
Are supported by the support shaft, and a plurality of
Hook block sheave supports the hook at both ends of the support shaft
It is rotatably supported at a position sandwiched from the side. Further, in this self-propelled crane,
Several boom point sheaves and wide groove sheaves
Is the wide groove sheave on both ends of the boom point pin?
A plurality of narrow groove sheaves with narrow grooves between them
As well as lifting the entire hook block
The wire to be wound is one end of the boom point pin
Narrow groove sheave and hook shaft at one end of support shaft
Wound around a wide groove sheave after being wrapped around a rock sheave
And then the boom poi on the other end of the support shaft
Narrow groove at the other end of the gear sheave and boom point pin
It is wrapped around a sheave. [0010] Therefore, according to the present invention, if necessary,
The boom head angle can be adjusted in
Crane work in high places that need to be vertical and high
Crane operation in a location where
In the latter case, a sufficient head is obtained.
It is. Therefore, according to the present invention, the upper obstacle and the upper surface of the load
For lifting loads when the working gap between them is small
Work efficiency is greatly improved,
Lifting a load that was previously impossible because the gap was too small
The effect that can be obtained is also obtained. Further, according to the present invention, the hook is supported.
Because the support shaft and the hook block sheave are coaxial,
Boom poi of the hook compared to when both are not coaxial
The approachable distance to the
Even a large lift can be obtained. Further, according to the present invention, a hook blower is provided.
And the sheep closest to the boom point sheave
When the wire wound around them is bent excessively
Is prevented by the wide groove of the wide groove sheave,
Unnecessary bending stress does not occur on the wire, and the wire
The effect that the durability is improved is also obtained. It should be noted that the invention of the present application is a boom
Boom head at the tip of the boom in the vertical plane
The hook is attached to the technology to adjust the angle
Attach multiple hook block sheaves to the supporting shaft
Can be rotated between the ends of the support shaft.
Noh support and multiple boom point seas
A wide groove sheave with a wide groove and the wide groove sheave
A plurality of narrow grooves with narrow grooves sandwiched from both ends
Groove sheave, and the entire hook block
The wire that can be wound up to lift the body
One of the narrow groove sheave and the support shaft at one end of the point pin
Wound around the hook block sheave on the end side
Later, it is wound around the wide groove sheave, and then the other end of the support shaft
Boom point sheave and boom point pin on side
That is wound around the narrow groove sheave on the other end side of
It can be thought of as a combination of technologies that perform This
The latter technology has been described by the present applicant in 1962.
Practical new on May 12, 1987 as Japanese Utility Model Application No. 62-70770
Application for draft registration was made, and on November 22, 1988
Application published as No. 180697, October 1990
The application was announced on the 12th as Jitsuhei 2-37827.
I have. On the other hand, the present application was filed by the applicant in August 1987.
Original application for Japanese Utility Model Application No. 62-130684 filed on the 27th
6-118, which was split on September 26, 1994
No. 56 was changed to a patent application. [0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention relates to a truck crane.
An embodiment applied to will be described in detail with reference to the drawings.
You. In FIG. 3, reference numeral 10 denotes a truck as a traveling body.
And the truck 10 has a truck in front of it.
The vehicle includes a cab 12 for performing 10 traveling operations. clay
During work, the outlets located before and after the rear wheel
The posture of the truck 10 is stabilized by the gauging devices 14 and 16.
Can be done. Each of the outrigger devices 14 and 16 is a truck 1
0 supports the left outrigger 18 and the right side
And the right outrigger 20. In addition,
A revolving unit 24 is installed on a gantry 22 behind the
And a turning device (not shown) housed in the turning body 24
Is to be turned. A boom 26 is provided on the revolving superstructure 24.
Supported rotatably in a vertical plane via a pin 28.
You. The boom 26 includes a first-stage boom 30 and a second-stage boom 32.
And the tip boom 34,
Hydraulic drive device not shown housed in boom 26
Stretched by. In addition, rotation of the boom 26,
That is, the undulation is performed by the undulation cylinder 36. What
The boom 26 shown in FIG. 3 is in the most contracted state.
And the lower surface of the tip boom 34 is
Storage state supported by a fixed boom rest 40
It is. The tip of the tip boom 34 and the
The attached boom head 42 is enlarged to FIG. 1 and FIG.
Shown. The end boom 34 has a vertical surface (rotation of the boom 26).
A pair of boom side plates 50 along the upper surface
2 and a boom lower plate 54 having a box-shaped cross section.
You. Each boom side plate 50 has a corner above its tip.
(Upper corner in FIG. 1)
Bosses 56 are coaxial with each other, and
Is fixed at a right angle. In addition, each boom side plate 50
Is the lower corner of its tip (the lower corner in FIG. 1)
Section), each of which has a first pin hole 66.
６８68 are welded. Both first pin holes 66 are boss 56
On a straight line parallel to the center line of. Those blocks 68
Are connected by a cylindrical member 70, and
They are also connected by a plate 54. The boom head 42 has a pair of opposed longitudinal shapes.
Side plates 72, and the side plates 72 are connected by connecting members 74.
Are connected in parallel with each other. One end of both side plates 72
(In the upper end in FIG. 1)
Is fixed coaxially and at right angles to the plate surface of the side plate 72.
I have. The distance between the inner end faces of both bosses 76 facing each other is
Slightly larger than the distance between the outer end faces of the boss 56
And their inside diameters are equal,
The state in which the tip of the drum 34 is inserted into the boom head 42
In this state, the rotation shaft 79 is inserted through the bosses 56 and 76.
That is, the tip boom 34 and the boom head 42 are
79 so that they are relatively rotatably connected.
You. The other end of both side plates 72 of the boom head 42
(Bottom end in FIG. 1)
80 are provided similarly to the boss 76, and these bosses are provided.
A boom point pin 84 is inserted through the switch 80.
The boom point pin 84 protrudes outward from the side plate 72.
A cylindrical member having a pair of flanges at each end
86 are fitted. On the side plate 72 of the boom head 42
Each has a cylindrical boss 90 close to the boss 76.
It is fixed coaxially and at right angles to the plate surface of the side plate 72,
The bosses 90 have second pin holes 92 formed therein.
Further, a boss 90 is provided on the side plate 72 of the boom head 42.
A similar boss 94 is provided in close proximity,
The boss 94 has a pair of third pin holes 96 formed therein.
You. Bosses 90 and 94 are equidistant from boss 76 and
The distance is equal to the distance between boss 56 and boss 68
You. Also, the tip boom 34 and the boom head 42 are rotated.
By rotating relatively around the shaft 79, the bosses 90, 94
Inside surface of both blocks 68 of tip boom 34
They are opposed to each other with a slight gap left. The rotation shaft 79 and the boom point pin 84
Boom point reference line L to connect_BPTo the second pin hole 9
A line connecting the second shaft 2 to the rotating shaft 79, the third pin hole 96 and the rotating shaft
The angle between each line and the line connecting 79 is the former
Smaller, α_minAnd α _maxIt has been. first,
The inner diameters of the second and third pin holes 66, 92, 96 are equal to each other.
The stopper pins 98 through them.
The first pin hole 66 and the second pin hole 92
When the cable is inserted through the loop as shown in the right side of FIG.
Boom reference line connecting the driving shaft 79 and the boom foot pin 28
L_BAnd boom point reference line L_BPAngle (hereinafter, referred to as
Boom head angle) is the minimum adjustment angle β_minTona
In addition, the stopper pin 98 is
When it is inserted through the hole 66, it is shown in the center of FIG.
The boom head angle is the maximum adjustment angle β_maxBecomes
That is, in the present embodiment, the stopper pin 98
State inserted into second pin hole 92 and first pin hole 66
And a state inserted through the third pin hole 96 and the first pin hole 66.
Boom 26 and boom head
Adjustable angle (boom head angle) with 42 in two stages
It is possible. The bosses 90 and 94 and
As shown in FIG.
The reinforcement member 99 having a U-shaped cross section is welded, and this portion is reinforced.
Have been. The stopper pin 98 is a pair of cylindrical blocks.
100 and 102 are coaxially connected by a cylindrical member 103.
It is composed. The cylindrical blocks 100 and 102
Bosses 90 and 94 of the boom head 42 and booms of the tip boom 34
Sufficient shear strength is provided at the position corresponding to the lock 68
Degree and the cylindrical member 103 is lightweight.
Is being planned. Cylindrical block 100 (s
Penetrate it diametrically through the right end of the topper pin 98)
Pin 104 is attached, and the cylindrical block 10
2 (the left end of the stopper pin 98 in the figure)
A male thread portion 106 having a diameter smaller than that of the male thread portion is formed.
Washer 108 and nut 110 are attached to 106
Have been. That is, the stopper pin 98 is
Pin holes 92 and 96 by the washer 108 and the nut 110.
It is prevented from leaving. Pin 104
Both ends protruding from the outer peripheral surface of the topper pin 98 are C-shaped
Are fixed at both ends of the metal fitting 112,
Detachment from the stopper pin 98 is prevented. Also,
The metal fitting 112 removes the stopper pin 98 from the boom head 42.
It also functions as a handle when pulling out
You. In addition, the washer 108 is used to
Washer 1 even if tightened until it touches the shoulder of
08 and the end faces of the bosses 90 and 94
The nut 110 is prevented from loosening
I have. The illustration is omitted in the rotating body 24 shown in FIG.
To wind up the wire 120 to suspend the load
A hoisting device is provided. The wire 120 is a revolving body
First idler sheave 1 rotatably mounted on 24
22, the second eye rotatably attached to the rotating shaft 79
Can rotate to drive sheave 124 and boom point pin 84
Boom point sheave 126 and flange attached to
Around the hook block sheave 130 of the hook block 128
After the call, the terminal is connected to the boom head as shown in FIG.
The socket 1 is fixed to the fixing pin 132 fixed to the side plate 72 of the
34. That is, in this embodiment,
In this case, the hook block 128 is
Drop from the boom point sheave 126 located at the tip
And the hook block 128 constitutes a hanging device.
It is doing. The boom point sheave 126 is shown in FIG.
Thus, three small sheaves (narrow groove sheaves) 136 having narrow grooves
And one large sieve having the same diameter as the small sheave 136 but having a wide groove.
138 (wide groove sheave).
138 is a state in which both sides are sandwiched by small sheaves 136, respectively.
Installed with. The hook block 128 includes a main body 142
And a pair of supports extending in opposite directions from the main body 142.
A support member 146 having a shaft 144 is provided. each
Two small sheaves 147 can rotate on the support shaft 144
To form a hook block sheave 130
And a cover attached to the support shaft 144.
148. Also, the main body 142
The shaft 152 of the hook 150 is inserted at right angles to the support shaft 144.
Has been passed. The tip of the shaft 152 extends through the body 142.
It is made larger in diameter than the through hole and from the main body 142 of the hook 150
Of the shaft 152 and the main body.
A thrust bearing is disposed between the thrust bearing and the thrust bearing.
In other words, the hook 150 rotates around the vertical axis as well as around the horizontal axis.
It is also rotatable. In this embodiment, the hook block
Center line of rotation of probe 130 and center of horizontal rotation of hook 150
Since the wire and the wire are coaxial, the hook 150
The approachable distance to the pad 42 is short, and a large head can be obtained.
Can be. However, because of this, the hook block 12
8, two small sheaves 147 are provided on the support member 1.
46 and the hook 150 are sandwiched.
Therefore, the center two small sheaves 147 are relatively far apart
Therefore, the boom point sheave 126 is changed correspondingly.
Without further modification, a conventional one consisting of a quadruple small sheave 136
If the hook block 128
When she approached sheave 126 the most,
Wire 120 is excessively bent. So
As a result, an undesired bending stress occurs in the wire 120,
This causes a problem that the durability of the ear 120 is reduced.
However, in the present embodiment, the boom point sheave 12
6 from three small sheaves 136 and one large sheave 138
With this configuration, one of the small sheaves 147 can
Via the other small sheave 147
Excessive bending of the wire 120 is avoided, and the wire 120
Is prevented from lowering in durability. The truck crane constructed as described above
Use at a maximum boom angle close to 90 °
In consideration of the use, the stopper pin 98 is
It is inserted through the second pin hole 92 and the boom head angle
Minimum adjustment angle β_minIt has become. Therefore, in FIG.
At the maximum boom angle, as shown to the left, hook
Make sure block 128 is at the tip of boom head 42
The hook block 128
Never touch the boom head 42 or tip boom 34
And a high head is obtained. On the other hand, obstacles such as ceilings in buildings
There is a restriction on the object B, and the boom 26 is used near horizontal
The boom head 42
Adjust the boom head angle to the maximum by inserting it through the third pin hole 96
Angle β_maxAnd In the present embodiment, the maximum adjustment angle
β_maxIs set as the optimal angle for the working height H
From above, as shown in the center of FIG.
The plane is almost parallel to the upper obstacle B that limits the working height.
Therefore, a large head L can be obtained. Suppose, boom
Angle β_minIf you go to
As close to the upper obstacle B as possible
And try to get enough head, as shown on the right side of FIG.
The boom head 42 before the end boom 34
The tip approaches upper obstacle B and the resulting lift
L 'is shorter by the amount that the boom head 42 is facing downward.
I will. Δ which is the difference between the head L and the head L '
However, for example, the working height H
The load W is high and the working gap S is small
Means that this difference δ has significant significance. The difference δ is
This is to be compared with the work gap S, and this difference δ
This facilitates the lifting and moving of the load W.
Work efficiency is improved, or lifting is impossible conventionally
The effect of being able to lift the load W
It is. FIG. 4 shows the most extended state of the boom 26.
It is in this state that the effect of the present invention, that is,
That is, the effect of increasing the lift is the greatest.
Even if the boom 26 is in other states,
The same effect can be obtained. It should be noted that, in this embodiment,
Use a hoisting device when pulling out and inserting the stopper pin 98
To rotate the boom head 42.
it can. First, the hoisting device is operated to set the hook block 1
28 and boom the top of hook block 128
It is brought into contact with the tip of the head 42. Wire from that state
Slightly winding 120 raises boom head 42 slightly
From the boom head 42 to the stopper pin 98.
A state in which almost no force acts. Like this
If the stopper pin 98 can be pulled out with a slight force,
And the stopper pin 98 and the first pin hole 66
Can be prevented from being damaged. From this state, hook block 1
28 is further raised, and the boom head 42 is moved to the position shown in FIG.
To rotate the first pin hole 66 and the third pin hole 9
The hoisting device is stopped when 6 substantially matches. this
In this state, the stopper pin 98 is connected to the first pin hole 66 and the third pin hole 66.
What is necessary is just to insert in the pin hole 96. Boom head 42 is equivalent
Heavy, but without the help of other cargo handling equipment
The stopper pin 98 and the boom head 42
Can be rotated. Note that the stopper pin
Pull out the second pin hole 92 from the third pin hole 96.
, The procedure may be reversed. Further, in this embodiment,
Instead of hanging the load W with the hook block 128,
The load is hung on the multipoint pin 84 via the cylindrical member 86.
The lift can be set vertically between the cylindrical member 86 and the ground G.
The distance gives a large lift. In this case, the load W
Lifting cannot be performed depending on the hoisting device,
This can be done by raising and lowering or expanding and contracting the boom 26.
Wear. The embodiment of the present invention has been described above.
The present invention can be implemented in other forms. For example,
In the present embodiment, the boom head 42 and the tip boom
The rotation shaft 79 of the arm 34 rotates the second idler sheave 124.
It also functions as a pivot axis, and the boom weight
Although the number of parts and the number of parts have been reduced,
The rotating shaft of the sheave 124 may be provided separately from the rotating shaft 79.
No. In this embodiment, the boom foot pin 2
8 and the boom point pin 84, that is, the boom
Although the length can be expanded and contracted by a multi-stage cylinder,
A fixed type that does not expand or contract may be used,
May be formed by bending the boom. Further
In the present embodiment, the boom head angle is set in two stages.
But can be adjusted in three or more stages
Also, adjust the boom head angle with warm and
Using a one-way rotation transmission mechanism such as a worm wheel
Is also good. In the latter case, the angle can be adjusted steplessly.
Wear. In addition, the present invention is limited to a truck crane.
Self-propelled cranes such as crawler cranes and wheel cranes
Various changes based on the knowledge of those skilled in the art, such as
The present invention can be implemented in a form or an improved form.
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged side view showing a boom head of a truck crane according to an embodiment of the present invention. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 is a side view showing the entire truck crane. FIG. 4 is an explanatory view showing a use state of the truck crane. [Description of Signs] 10 Track 26 Boom 42 Boom head 66 First pin hole 79 Rotating shaft 92 Second pin hole 96 Third pin hole 98 Stopper pin 120 Wire 126 Boom point sheave 128 Hook block 130 Hook block sheave 136 Small sheave 138 Large sheave 144 Support shaft 150 Hook

   ────────────────────────────────────────────────── ─── Continuation of front page    (56) References Japanese Utility Model 62-157779 (JP, U)                 62-34586 (JP, U)                 Actual opening 1981-44,841 (JP, U)                 Shokai 57-56685 (JP, U)                 Shokai Sho 57-74387 (JP, U)                 Actual opening 63-180697 (JP, U)                 Jiko 48-43560 (JP, Y1)                 Tokiko 49-1821 (JP, B1)

Claims (1)

(57) [Claims] A boom that is supported by the traveling body and rotates in a vertical plane, a boom head that is attached to the tip of the boom so that the angle between the boom and the boom in the vertical plane can be adjusted, and that is attached to the tip of the boom head A boom point pin extending in the horizontal direction, and a plurality of boom point sheaves rotatably supported by the boom point pin, wherein the wide groove sheave having a wide groove and the wide groove sheave are provided from both ends of the boom point pin. A plurality of narrow groove sheaves having narrow grooves to be sandwiched, a hook on which a load is suspended is supported by a support shaft extending in a horizontal direction, and a plurality of hook block sheaves support the hooks on the support shaft. And a hook block rotatably supported at a position sandwiched from both ends of the hook block. A wire to be raised, which is wound around the narrow groove sheave at one end of the boom point pin and the hook block sheave at one end of the support shaft, then wound around the wide groove sheave, and then supported A self-propelled crane comprising a hook block sheave at the other end of the shaft and a narrow groove sheave at the other end of the boom point pin.