JPS6016634Y2 - Jib boom storage support device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a device for storing and supporting a jib boom in a crane.

As shown in Figs. 1 and 2, the crane has a main boom 1 consisting of a base boom 11, an intermediate boom 12, and a tip boom 13 arranged telescopically, and an angle material etc. is combined at the tip of the tip boom 13. The jib boom 2 is connected to expand the working radius.

As shown in Figures 8 and 9, this jib boom is assembled by passing a large number of sub-beams 2.2 between four main beams 21 made of angle materials, etc., and the wire wrapped around the tip is unnecessary. A sheave 2a is provided, and four shaft holes 21a (only three are shown in the figure) are provided at the base end of each main beam 21.

Each shaft hole 21a is a bracket 13a extending from both sides of the tip end of the tip boom 13.

The shaft holes 2 are aligned with the shaft holes 13b (only one side is shown) formed in each of the upper and lower shaft holes 13a.
A pair of pins (only one is shown on one side) 13c is inserted into each of 1a and 13b.

The jib boom 2 is removably connected to the tip of the tip boom 13 by 13c and 13d, as shown by imaginary lines.

When storing this jib boom 2, use the tip boom 1.
pins 13c, 13c, 1 that connect the base end of the jib boom 2 and the tip of the tip boom 13.
3d, only the pin 13d on one side is removed, and the jib boom 2 is rotated 180' around the pins 13c and 13a, so that one side of the jib boom 2 is aligned with one side of the base boom 11.

On one side of the jib boom 2, there is an L-shaped storage pin 23.23 in the middle part of the rod, and also an L-shaped locking rod 23 in the tip part.
4 are fixed with their proximal ends facing the distal end side of the jib boom 2, and on the side of the base boom 11 are a support 14 and a locking rod 24 that engage and support the storage pins 23 and 23.
A support 15 that holds the jib boom 2 is fixed.
When it is rotated by 180° around pins 13c and 13a, storage pins 23, 23 and locking rods 24 are located in front of supports 14 and 15, respectively, as shown in FIG.

When the intermediate boom 12 is moved to the complete retraction position in this state, the storage pins 23 and 23 are inserted into the insertion holes 14a and 1 of the support 14.
4a, and the locking rod 24 is placed on the support 15, so that the jib boom 2 is stored and supported on the side of the base pool 11 in a sideways state, as shown by solid lines in FIG.

Note that after the jib boom 2 is stored and supported, the pin 13c,
13c, the intermediate boom 12 and tip boom 13 of the main boom 1 can be freely moved in and out independently of the jib boom 2.

When returning the jib boom 2 from the stored position as shown in FIG. 8 to the operating position, the above-mentioned operation can be performed in reverse. With the tip boom 13 and the intermediate boom 12 in the retracted position, remove the bracket on one side of the tip boom 13. Each shaft hole 13 of 13a
b, 13b in each shaft hole 2 of the main beam 21 in the jib boom 2
1a * 21a and insert the pins 13c, 13c, then extend the tip boom 13 slightly and insert the storage pins 23, 2.
3 from the insertion holes 14a, 14a of the support 14, and the locking rod 24 is removed from the support 15.

Then move the jib boom 2 around pins 13c and 13c.
0 rotation, and each shaft hole 1 on the other side of the tip boom 13
3b and each shaft hole 21a on the other side of the jib boom 2, and insert the pins 13d into these, respectively, to connect the jib boom 2 to the tip boom 13.

By the way, in such a configuration, when the jib boom 2 is placed along the base boom 11, as shown in FIG.
4a aligns correctly, but after years of use, pin 13
c, 13c, shaft holes 13b, 13b, and 21at 21a due to wear, or jib boom 2 itself being deformed due to twisting, the jib boom 2 was rotated 180 degrees around pins 13c, 13c, as shown in the opening of Figure 10. When the storage pin 23.
23 and the insertion holes 14a, 14a in the support 14, and although not shown in the drawing, the locking rod 24
The position of the support tool 15 is shifted, and the storage pin 23.23 is inserted into the insertion hole 14a.

14a, and the locking rod 24 cannot be mounted on the support 15, which is an inconvenience.

For this reason, in the past, the storage pin 23.23, the locking rod 2
A support device for a jib boom in a crane has been proposed in which the positions of the support 14 and the support 15 can be moved and adjusted in response to the deviation of the support 14 and 15 (Japanese Utility Model Application No. 51-7987).
.

However, this conventional device allows the support to be moved back and forth or left and right along the side of the base boom.
If there is a single storage pin, it can be put to practical use, but when there are multiple storage pins, if the storage pin position deviates as shown in the opening in Figure 10, it is difficult to simply move the support to the front, back, left, or right. However, if the support member is moved only by moving the support member to the position shown in FIG.

Generally, in cranes, in order to lift and lower heavy objects, a large amount of load is applied to the tip of the jib boom, which causes bending deformation in which the tip of the jib boom gradually bends downward. The disclosed conventional device can only move the support back and forth and left and right, and is hardly effective against bending deformation in which the tip of the jib boom is lowered.

The present invention was devised in view of the above circumstances, and its purpose is to provide a support having an insertion hole into which a locking fitting such as a storage pin is inserted, and to connect both ends of the support to the main boom. The shaft is rotatably supported around an axis parallel to the longitudinal direction, each shaft is movable along the side of the main boom, and at least one of the shafts is supported so as to be movable near and far from the side of the main boom. To provide a storage support device for a jib boom, which can adjust the tilting of the support according to the deviation of a storage pin, and can reliably and safely store and support the jib boom even after years of use. be.

The present invention will be specifically explained below based on an embodiment in which the present invention is applied to a vehicle-mounted crane shown in FIGS.

Fig. 3 is a perspective view showing the storage state of the jib boom in a crane equipped with the jib boom storage and support device according to the present invention (hereinafter referred to as the device of the invention), Fig. 4 is an enlarged front view of the support in the device of the invention, and Fig. 5 Figure 6 is an explanatory diagram of the operation, in which 1 is the main boom, the base boom 11, the intermediate boom 1
2. It is constructed by telescopically disposing a tip boom 13, and a jib boom 2, which is stored and supported on the side of the base boom 11 in a sideways state, can be added to the tip boom 13 as needed. It looks like this.

The jib boom 2 is integrally assembled by passing a number of sub-beams 22 made of angle material or the like between four main beams 21 made of angle material or the like, and has a wire hook at the tip. The main beam 21 is provided with a sheave 2a, and a shaft hole 21a is provided at the base end of each main beam 21, respectively.

In order to correspond to each shaft hole 21a, a pair of upper and lower shoes, that is, four (
Shaft holes 13b (only 2 pins are shown in the drawing) are formed, and two pins 13c are formed by aligning each shaft hole 13b with 21a (only 2 pins are shown in the drawing). , 13
By inserting d, the jib boom 2 is removably connected to the extension of the tip boom 13.

In addition, the tip boom 13, the top on one side of the jib boom 2,
By removing the lower pin 13d, the jib boom 2
is rotated 180 degrees around the remaining pin 13c, so that the jib boom 2 can be moved to a position on the extension of the tip boom 13 and a position along the side of the base boom 11.

In the middle part of one side of the jib boom 2, storage pins 23.23, which are L-shaped engagement fittings, are arranged parallel to each other at a required distance apart in the width direction of the jib boom 2, with the tip side facing the tip side of the jib boom 2. A locking rod 24, which is also L-shaped, is provided at one end of the jib boom 2 with its end facing toward the end of the jib boom 2.

All of the configurations described above are exactly the same as in the conventional case.

A support 3 for supporting the storage pins 23 and 23 of the jib boom 2 and a support 4 for supporting the locking rod 24 are disposed on the side surface of the base boom 11.

The support 3 is formed into a rod shape as shown in FIG. 4, and a reinforcing ring having insertion holes 3a, 3a into which the storage pins 23 and 23 are inserted is fitted in the middle part, and reinforcing rings are fitted in the middle part, respectively. Axis 31.32 oriented parallel to the longitudinal direction of the main boom 1
It is pivoted so that it can rotate.

The shaft 31 has holes 31a, 31a near both ends, and the shaft 32 has screw holes 32a, 32a near both ends.
32a are formed, and set bolts 33.33 and screw holes 32a, 3 passed through the number holes 31a, 31a.
It is supported on a mounting base 35.36 using a set bolt 34.34 screwed through 2a.

The mounting base 35 is fixed to one side of the base boom 11 by welding at a position closer to the upper edge when the base boom 11 is horizontal, and the mounting base 36 is fixed to a position closer to the lower edge when the base boom 11 is horizontal.

The mounting base 35 is oriented parallel to the longitudinal direction of the main boom 1 to the mounting block 35a and the mounting block 35a,
It consists of a shaft 35b that is rotatably supported around the axis, and holes oriented perpendicular to the axis are drilled near both ends of the shaft 35b (only one side is shown in the figure). 35
The tips of set bolts 33 and 33, which are passed through the holes 31a and 31a of the shaft 31, are screwed into the holes 33 and 33c, respectively.

On the other hand, the mounting base 36 includes a rectangular board 36a and a rectangular board 36a.
It is composed of four pillars 36b which are vertically opposed to each other, and holes 36C and 36c which are vertically opposed to each other are located near the tips of the pillars 36b and 36b, respectively.
is formed.

The shaft 32 has both ends attached to the upper and lower supports 3 of the mounting base 36.
6b and 36b, and each screw hole 32a is connected to the support column 36.
The set bolts 34, 34 are located concentrically with the upper and lower holes 36c in b, and each set bolt 34.34 is located in the upper hole 36c, 36
C through the screw hole 32a of the shaft 32, and then pass each tip through the lower hole 36C, 36c.
Each set bolt 34.3 passed through 6 c, 36 c
A nut 34 at 34 a is screwed and tightened on the tip of 4.

Both 33b and 34b are lock nuts, and the lock nut 33b is screwed onto each set bolt 33, 33 between the shafts 31 and 35b, and is tightened in contact with the shaft 31. The set bolts 34 and 34 are screwed into each set bolt 34 and 34 between the lower support column 36b of the mounting base 36, and are tightened in contact with the shaft 32.

Then, loosen each lock nut 33b and tighten the set bolt 33.
, 33 in the negative direction, the set bolts 33, 3
3 is removed from the screw hole 35c of the shaft 35b, and the support 3 is rotated around the upper end of the shaft 32, so that the support 3 is parallel to the side surface of the base boom 11 as shown in FIG. The support 3 is tilted from the state shown by the imaginary line to the state shown by the solid line in which the inclination angle of the support 3 increases with respect to the side surface of the base pool 11, and the insertion holes 3a, 3 are moved to face the storage pins 3, 3.
The position of a will be adjusted.

By rotating the set bolts 33.
Move in a direction parallel to the side of 1.

On the other hand, loosen the lock nut 34b and set the set bolt 34,
34 in the - direction, the support 34 is moved relative to the set bolt 34.34, and the support 3 is regulated by the set bolt 33.33 and moves from the bottom shown by the solid line to the top shown by the imaginary line. If the set bolts 34 and 34 are turned in the opposite direction to the above case, the support 3 will be moved from above to below.

Therefore, by appropriately rotating and adjusting the set bolts 33, 33, 34, and 34, the positions of the support 3, in other words, the insertion holes 3a, 3a, can be adjusted two-dimensionally within a plane orthogonal to the axis thereof. It is possible.

As shown in FIG. 7, the support 4 is formed into a T-shape in plan view, and has a pair of screw holes 4a (only one side is shown in the figure) at its base. It is attached between a pair of upper and lower brackets 42, 42 using a pair of set bolts 41, 41 that are screwed through.

Each bracket 42.42 has two holes (only one hole is shown in the drawing) 4 at opposite positions on the top and bottom.
2a, 42a are formed, and the base of the support 4 is located between both brackets 42, 42, and the screw hole 4a is positioned concentrically with the upper and lower holes 42a, 42a.

Each set bolt 41, 41 is screwed from above into the hole 42a of the upper bracket 42, through the threaded hole 4a of the waist support 4, and then passed through the hole 42a of the lower bracket 42, and from this hole 4a. set pole protruding downward) 41
, 41, nuts 41a, 41a are screwed and tightened.

A lock nut 41b is screwed onto each set bolt 41 between the support 4 and the lower bracket 42, and is tightened in contact with the lower surface of the support 4.

If each lock nut 41b and nut 41a are loosened and each set bolt 41.41 is rotated in one direction, the support 4 will move relative to the set bolt 41.41, as shown by an imaginary line from below shown by a solid line. If the set bolts 41 and 41 are moved upward and the set bolts 41 and 41 are rotated in the opposite direction to the above case, the support 4 will move from the upper direction shown by the imaginary line to the lower direction shown by the solid line, and the locking rod 24 will be moved upward. It will be moved and adjusted to a position in contact with the lower surface.

In the device of the present invention configured in this way, the support 3 has both ends thereof in a direction perpendicular to the longitudinal direction of the base boom 11 connected to the shafts 31.
．． 32, and is rotatably supported around shafts 31 and 32.
are set bolts 33 and 33 for mounting bases 35 and 36 respectively.
, 34. Attach the base boom 1 to the side of the base boom 11 using the 34.
The shaft 31 is supported movably in a direction orthogonal to the longitudinal direction of the boom 1, and the shaft 31 is pivoted to the mounting base 35 using set bolts 33, 33 so as to be movable near and far from the side of the base boom 11. The support 3 is a set bolt 33.33,3
4 and 34, the movement of the pin 13c for attaching the jib boom 2 to the tip boom 13 is adjusted two-dimensionally within a plane orthogonal to the side surface of the base boom 11.

13d and a shaft hole 13b for inserting the pins 13c and 13d.
, 21b, etc., or the jib boom 2 itself is deformed and the position of the storage pin 23.23 is deviated, the movement of the support 3 will ensure that the insertion holes 3a, In addition to being able to set the jib boom 2 at a position facing the jib boom 23, it is also possible to easily align the proximal end of the jib boom 2 with the distal end of the distal end boom 11.

The support 4 is also a bracket 42, 42 fixed to one side of the base boom 11 using set bolts 41, 41.
On the other hand, since the base boom 11 is supported so as to be movable and adjustable in a direction perpendicular to the longitudinal direction, even if the locking rod 24 is displaced due to deformation of the jib boom 2 as described above, each set bolt 41 By operating step 41, the support 4 can be reliably set at a position in contact with the lower surface of the locking rod 24, and by adjusting the support 4, the base end of the stored jib boom can be moved up and down, and the tip It is possible to easily align and overlap the holes 13b of the brackets 13a, 13a in the boom 11 and the holes 21b at the base end of the jib boom 2.

As described above, in the proposed device, even if the jib boom is deformed due to long-term use and this causes a misalignment between the storage pin and the support that should support it, it can be easily operated using the set bolt. It is possible to reliably move the support to the position where the storage pin should be supported, which eliminates inconveniences such as the inability to store the jib boom, and also improves alignment between the base end of the jib boom and the tip of the main boom. The present invention has excellent effects in that the work can be done easily.

In particular, according to the present invention, since the support can be moved in the vertical direction, even if the jib boom undergoes bending deformation in the vertical direction, the storage pin and the support can be aligned without any support.

In addition, with the jib boom, torsional deformation may occur due to horizontal pulling work in which heavy objects are dragged and moved in the left and right directions. Even if such deformation occurs, the present invention allows the supports to be moved in the vertical and horizontal directions. Since it can be moved, the storage pin and the support can be easily aligned.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing how the jib boom is used in a mobile crane, Figure 2 is a schematic diagram showing how the jib boom is stored, Figure 3 is a perspective view showing how the proposed device is used, and Figure 4 is the proposed device. Enlarged front view of the support in the device, No. 5
, 6 is an explanatory diagram of the operation of the proposed device, FIG. 7 is an enlarged side view of the support in the proposed device, FIG. 8 is a plan view showing the state of use of the conventional device, and FIG. 9 is the same (explanation of the operation of the conventional device). figure,
FIG. 10A is an explanatory diagram of a conventional device in which the storage pin and the support are properly aligned, and FIG. 10B is an explanatory diagram showing a state where the storage pin and the support are misaligned. 1... Main boom, 2... Jib boom,
3... Support tool, 3a... Insertion hole, 4.
...Bearing tool, 11, curve, base boom, 12...
...Middle boom, 13...Tip boom, 13b
...Shaft hole, 13d...Pin, 23...
... Storage pin, 24 ... Locking rod, 31.32
...Shaft, 33, 34...Set bolt, 35...Mounting base, 35b...Shaft, 3
6...Mounting base, 36b...Curved support.

Claims (1)

[Scope of utility model registration request] In order to store and support the jib boom, which is used in conjunction with the tip of the main boom, in a horizontal position on the side of the main boom, a support device is attached to the side of the main boom that locks the locking metal fitting provided on the side of the jib boom. In a jib boom storage support device, one end of the support in a direction perpendicular to the longitudinal direction and width direction of the main boom is rotatably supported around an axis parallel to the longitudinal direction of the main boom, and , supports its shaft so as to be movable along the side surface of the main boom in a direction perpendicular to the longitudinal direction and width direction of the main boom, while the other end of the support is supported in a direction perpendicular to the longitudinal direction and width direction of the main boom. A storage and support device for a jib boom, characterized in that it is supported so as to be movable to the sides of the main boom, and to be movable near and far from the side of the main boom.