JPH08282973A - Outrigger device - Google Patents

Abstract

PURPOSE: To easily further surely manage a height direction clearance between an outrigger box and an outrigger beam, by providing a clearance adjusting mechanism comprising a pad from a shim inserting port formed between a notch and a roof and a shim inserted between the pad and the roof. CONSTITUTION: In a clearance adjusting mechanism 10, with an opening side of a notch facing to a side of a roof 1a further toward an overhanging direction of an outrigger beam 2, a frame unit 11 is secured, to form a shim inserting port 11b by these notch and roof 1a. A lower surface of a pad 12 is supported by a pad retaining jig formed by bending a flat plate, to insertion fit the outrigger beam 2 to an outrigger box 1, thereafter to remove the pad retaining jig. Next, a shim is pressed in sheet by sheet from the shim inserting port to be inserted between the pad 12 and the roof 1a, also to mount a shim extraction preventing mechanism, so as to assemble the clearance adjusting mechanism 10. In this way, clearance in a lower surface of the pad 12 can be freely adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outrigger device capable of freely adjusting a heightwise clearance between a tip portion of an outrigger box and an outrigger beam.

[0002]

2. Description of the Related Art A typical outrigger device (conventional example 1) used in a self-propelled crane (not shown) is a self-propelled crane as shown in FIG. An outrigger box 1 is fixed to a lower frame (not shown), and an outrigger beam 2 having a jack cylinder 4 having a float 4a at its lower end on the tip side is fitted into the outrigger box 1. The outrigger beam 2 is configured to be extended and stored by the expansion and contraction operation of the rod of the extension cylinder 3 provided in the outrigger box 1.

Therefore, when carrying out a crane operation,
As shown by the phantom line in the figure, the outrigger beam 2 is extended outward in the width direction of the self-propelled crane by the extension operation of the rod of the extension cylinder 3, and the rod of the jack cylinder 4 is extended downward to float 4a. By grounding the vehicle and lifting the self-propelled crane from the ground to ensure its stability, the self-propelled crane is prevented from tipping over during crane work.

More specifically, the outrigger box 1 is
FIG. 6 (b) of the plan view showing the half section and F of FIG. 6 (b).
As shown in FIG. 6C of the cross-sectional view taken along the line F, by the top plate 1a, the bottom plate 1b, the side plates 1c, 1c on the outer side in the width direction, and the side plate 1d arranged at the center of these side plates 1c, 1c It is formed in a rectangular tube shape. Also, the outrigger box 1
Are formed in a state in which two self-propelled cranes (not shown) are stacked in the advancing / retreating direction, and the outrigger beams 2 are configured to project in opposite directions and to be retracted and stored in opposite directions. The outrigger devices having such a structure are respectively provided at two positions in the advancing / retreating direction of the self-propelled crane.

In order to stabilize the self-propelled crane in a horizontal state during crane work with the outrigger device,
Top plate 1a and outrigger beam 2 of outrigger box 1
It is extremely important to control the clearance between the upper surface of the and the upper surface. That is,
As shown by an imaginary line in FIG. 6A, when the outrigger beam 2 is extended, a thrust force from the ground surface acts on the outrigger beam 2 via the jack cylinder 4. And
This thrust force is supported by the tip portion of the outrigger box 1, but if there is a gap at the tip portion of the outrigger box 1 due to a large dimensional difference in the height direction, the jack cylinder 4 side is high and the outrigger box 1 is fitted. The outrigger beam 2 is inclined such that the insertion side is lowered. This causes the following problems. During crane work, the outrigger beam rattles, causing the self-propelled crane to sway, adversely affecting crane work efficiency. As described above, since the outrigger beam 2 that is bulged during crane work is in an inclined state, a bending force acts on the jack cylinder 4 that is mounted at a right angle to the outrigger beam 2, and the jack cylinder 4 leaks oil. Is more likely to occur. This is not desirable in appearance and leads to a decrease in commercial value.

Therefore, the top plate 1a of the outrigger box 1
The clearance in the height direction between the upper surface of the outrigger beam 2 and the outer trigger beam 2 must be managed with high accuracy. A device that enables such gap management is disclosed in, for example, Japanese Utility Model Application Laid-Open No. 4-117895 filed by the applicant of the present application. Hereinafter, the outline of the outrigger device according to Conventional Example 2 will be described with reference to FIG.
(A) and FIG. 7 (b) of the GG line sectional view of FIG. 7 (a).
And FIG. 7C of the enlarged view taken along the line HH of FIG. 7A, the description will be given with the same reference numerals described in the specification.

That is, the top plate 12 is divided into a tip plate portion 12b provided at the tip portion of the outrigger box 11 which serves as an entrance / exit of the outrigger beam, and a main body plate portion 12a other than the tip portion of the outrigger box 11. . The end surface of the tip plate portion 12b and the end surface of the main body plate portion 12a are butted against each other and welded together, and the tip plate portion 12b is also welded.
The height h between the bottom plate 13 and the bottom plate 13 is adjusted, and the end faces in the width direction of the tip plate portion 12b and the main body plate portion 12a are welded to the side surfaces of the side plates 14 and 15 which face each other. ing. Note that, similar to the case of the top plate 12, even if the bottom plate 13 is divided into a tip plate portion and a main body plate portion, the same effect can be expected.

[0008]

However, since the outrigger box and the outrigger beam are both canned products, even in the outrigger box according to the above-mentioned conventional example in which the gap is controlled, the welding distortion and the twisting are caused. It is impossible to avoid such things. Therefore, in order to avoid interference at the time of inserting the outrigger beam into the outrigger box and to smoothly extend and store the outrigger beam, it is necessary to allow the fitting to have a certain amount of space, and the above-mentioned problems occur. It cannot be completely eliminated. Further, in order to improve the dimensional accuracy of the outrigger box and the outrigger beam to some extent, an expensive can-making jig has to be used, and there is an economic problem to be solved to prevent the reduction of these manufacturing costs. .

Therefore, in view of the above situation, it is an object of the present invention to provide an outrigger device capable of easily and reliably managing the gap between the outrigger box and the outrigger beam in the height direction.

[0010]

In order to solve the above-mentioned problems, the features of the means adopted by the outrigger device according to claim 1 of the present invention are that they are provided before and after in the forward and backward direction of the self-propelled crane. In an outrigger device formed by a top plate, a side plate, and a bottom plate formed into a rectangular tube shape, an outrigger beam having a jack cylinder provided with a float at the lower end on the tip side is bulged and retractable. The lower surface of the top plate at the tip of the outrigger beam of the outrigger box has a notch forming a shim insertion opening, and the opening side of the notch faces the top plate side, and the outrigger beam overhangs. A frame fixed to the side, a pad housed inside the frame, a shim insertion opening formed between the notch and the top plate to connect the pad and the top plate. There is to provided a clearance adjustment mechanism consisting of a shim to be inserted into.

In order to solve the above-mentioned problems, the means adopted by the outrigger device according to claim 2 of the present invention is characterized in that in the outrigger device according to claim 1, the shim insertion port is closed. There is provided a shim removal prevention mechanism including a plate for fixing the plate and a fixing means for fixing the plate to the outrigger box.

[0012]

According to the outrigger device according to the first aspect of the present invention, a notch for forming a shim insertion opening is formed on the lower surface of the top plate at the tip of the outrigger box, which is the entrance and exit of the outrigger beam. Formed between the notch and the top plate, a frame body fixed with its opening side facing the top plate side, and facing the overhanging side of the outrigger beam, a pad housed inside the frame body, Since a gap adjusting mechanism including a shim inserted between the pad and the top through the shim insertion opening is provided, the shim is formed between the notch of the frame of the gap adjusting mechanism and the top. By inserting the shim between the pad housed in the frame and the top plate through the shim insertion opening, the gap between the lower surface of the pad and the upper surface of the outrigger beam can be freely adjusted.

Further, according to the outrigger device according to the second aspect of the present invention, a plate for closing the shim insertion port,
Since the shim pull-out preventing mechanism including the fixing means for fixing the plate to the outrigger box is provided, in addition to the action of the outrigger device according to the above-mentioned claim 1, the shim may cause a shim insertion opening due to vibration or the like. Even if you try to pull it out, it will be blocked by the shim pullout prevention plate.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An outrigger device according to an embodiment of the present invention will be described below with reference to FIG.
FIG. 1B is a view taken along the arrow A in FIG. 1A and BB in FIG.
1C of the line sectional view, FIG. 2A of the C portion enlarged view of FIG. 1C, FIG. 2B of the arrow D view of FIG. 2A, and the gap adjusting mechanism 2C of the perspective view of the frame body of FIG. 3, FIG. 3 of the cross-sectional view of the gap adjusting mechanism, and FIG. 4 of the explanatory drawing of the shim removal preventing mechanism.
The description will be made with reference to (a) and (b) and FIG. 5 which is an explanatory view of inserting the outrigger beam into the outrigger box.
However, the difference between the outrigger device according to the present embodiment and the typical prior art example 1 is the presence or absence of a gap adjusting mechanism, and therefore the description of the configuration of the outrigger device will be omitted here. The same parts and those having the same functions as those of the conventional example will be described with the same reference numerals.

Reference numerals 1 and 1 shown in FIGS. 1 and 2 denote outrigger boxes, which are exactly the same as the typical prior art example 1 described above, and include a top plate 1a and a bottom plate 1.
b and the side plates 1c, 1c and the side plate 1d are formed into a rectangular tube shape. Each of the surfaces of the top plate 1a facing the bottom plate 1b at the tip end side of the outrigger box 1 has two
The gap adjusting mechanisms 10 and 10 having the configuration described later are provided one by one.

The gap adjusting mechanism 10 is shown in FIG.
As shown in (C), the opening side of the notch 11a is placed on the top plate 1a.
The frame body 11 is fixed toward the side and toward the overhanging direction of the outrigger beam 2 not shown. A shim insertion port 11b is formed by the notch 11a and the top plate 1a. In addition, as shown in FIG. 3, a pad 12 is housed inside the frame body 11, which is in sliding contact with the outrigger beam 2 that is extended and stored, and a shim insertion opening is provided between the pad 12 and the top plate 1a. A plurality of shims 13 (5 in this example) inserted from 11b are accommodated.

Further, as shown in FIGS. 4 (a) and 4 (b), the plate 21 fitted into the shim insertion opening 11b of the clearance adjusting mechanism 10 and the female screw threaded on the top plate 1a is screwed. There is provided a shim removal prevention mechanism 20 including a bolt 22 which is a fixing means for fixing the plate 21 to the outrigger box 1 by doing so. The shim removal prevention mechanism 20 is aimed at improving the reliability of the gap adjusting mechanism 10. That is, from a long-term viewpoint, when the outrigger beam 2 is extended, the shim 13 may be pulled out from the shim insertion port 11b when the shim 13 is slightly pulled by the moving pad 12. Of course, it is not necessary to provide the shim removal prevention mechanism 20 in the short term.

By the way, as described above, the gap adjusting mechanism 10 is provided on the surface of the top plate 1a facing the bottom plate 1b. Therefore, when the outrigger beam 2 is fitted into the outrigger box 1, the pad 1 housed in the frame 11 is inserted.
It is conceivable that the gap adjusting mechanism 10 cannot be assembled due to the dropping of the gap adjusting mechanism 2. However, the gap adjusting mechanism 10 can be assembled without dropping the pad 12 by utilizing the pad holding jig having the configuration described later.

Hereinafter, how to assemble the clearance adjusting mechanism 10 will be described with reference to FIG. 5. First, the pad 1 is attached to the frame body 11.
Accommodates 2. Then, the lower surface of the pad 12 is supported by a pad holding jig 30 formed by bending a flat plate, and after the outrigger beam 2 is fitted into the outrigger box 1,
The pad holding jig 30 is removed. Next, the shims may be pushed one by one from the shim insertion openings to insert them between the pad 12 and the top plate 1a, and a shim removal preventing mechanism may be attached. After the pad 12 is temporarily attached to the top plate 1a with double-sided tape, the outrigger beam 2 is attached to the outrigger box 1.
It is also possible to adopt a simple method of inserting into.

Therefore, even if there is a dimensional allowance between the outrigger box 1 and the outrigger beam 2 as in the prior art, the outrigger device according to this embodiment provides
By adjusting the number of shims to be inserted between the pad 12 and the top plate 1a, the clearance in the height direction between the lower surface of the pad 12 and the outrigger beam 2 can be freely adjusted. Since the rattling of the outrigger beam 2 can be prevented, the work efficiency of the crane can be improved, the outrigger beam 2 can be held horizontally, and the bending force does not act on the jack cylinder, which reduces oil leakage troubles. In addition to improving the appearance of the self-propelled crane during crane work, the rigor of dimensional accuracy between the outrigger box 1 and the outrigger beam 2 does not need to be increased so much, and a simple jig is sufficient. Can also contribute to the reduction of

[0021]

As described in detail above, the first aspect of the present invention
According to the outrigger device according to the second aspect, the gap in the height direction between the outrigger box and the outrigger beam can be freely adjusted by the gap adjusting mechanism provided in the outrigger box. Since the beam 2 does not rattle, the crane work can be performed with high efficiency, and oil leak troubles do not occur frequently in the jack cylinder, improving the reliability of the self-propelled crane, and also the self-propelled crane during crane work. In addition to the improved appearance, the dimensional accuracy of the outrigger box 1 and the outrigger beam 2 does not need to be increased so much, so that the manufacturing cost of the outrigger device can be significantly reduced.

[Brief description of drawings]

1A is a plan view of an outrigger box of an outrigger device according to an embodiment of the present invention, and FIG. 1B is a plan view of FIG.
1A is a view as viewed from the direction of arrow A, and FIG. 1C is a cross-sectional view taken along line BB of FIG. 1B.

2 (a) is an enlarged view of a C portion of FIG. 1 (c), FIG.
2B is a view taken in the direction of arrow D in FIG. 2A, and FIG. 2C is a perspective view of the frame body of the gap adjusting mechanism.

FIG. 3 is a cross-sectional view of the gap adjusting mechanism of the outrigger device according to the embodiment of the present invention.

4 (a) and 4 (b) are explanatory views of a shim removal preventing mechanism.

FIG. 5 is an explanatory diagram of inserting the outrigger beam into the outrigger box of the outrigger device according to the embodiment of the present invention.

6A is a sectional view showing a main part of a typical outrigger device according to Conventional Example 1, FIG. 6B is a half sectional plan view of an outrigger box, and FIG. Figure 6 (b)
6 is a cross-sectional view taken along line FF of FIG.

7 (a) is a plan view showing a half section of an outrigger box of an outrigger device according to Conventional Example 2, FIG. 7 (b) is a sectional view taken along line GG of FIG. 7 (a), and FIG. c) is shown in FIG.
3 is a cross-sectional view taken along line HH of FIG.

[Explanation of symbols]

1 ... Outrigger box, 1a ... Top plate, 1b ... Bottom plate, 1
c ... Side plate, 1d ... Side plate 2 ... Outrigger beam, 3 ... Overhanging cylinder, 4 ... Jack cylinder, 4a ... Float, 10 ... Gap adjusting mechanism, 1
DESCRIPTION OF SYMBOLS 1 ... Frame body, 11a ... Notch, 11b ... Shim insertion opening, 12
... Pads, 13 ... Shims, 20 ... Shim removal prevention mechanism, 2
1 ... Plate, 22 ... Bolt, 30 ... Pad restraining jig.

Claims (2)

[Claims] 1. An outrigger box, which is provided in front of and behind the self-propelled crane in the advancing / retreating direction and is formed in a rectangular tube shape with a top plate, side plates, and a bottom plate, has a jack cylinder having a float at its lower end on the front end side. In an outrigger device in which an outrigger beam is bulged and retractably inserted, a cutout for forming a shim insertion opening is formed on a lower surface of a top plate at a tip end portion of the outrigger box that serves as an entrance and exit of the outrigger beam. Between the notch and the top plate, a frame body fixed with the opening side of the notch facing the top plate side and the overhanging side of the outrigger beam, a pad housed inside the frame body, and the notch and the top plate. An outrigger device comprising a gap adjusting mechanism including a shim inserted between the pad and the top plate through a formed shim insertion opening. 2. A plate for closing the shim insertion opening,
The outrigger device according to claim 1, further comprising a shim removal preventing mechanism including a fixing means for fixing the plate to the outrigger box.