JP3502352B2 - Boom foot pin removal equipment for construction machinery - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boom foot pin attaching / detaching device for a construction machine, and more particularly to a boom foot pin inserting means for connecting a boom foot and an upper swing body in a crawler crane or the like. The present invention relates to a boom foot pin attachment / detachment device for a construction machine configured to be attached and detached by using.

[0002]

2. Description of the Related Art A conventional boom foot pin attaching / detaching device for a construction machine of this type will be described with reference to FIGS. In FIG. 5, reference numeral 1 indicates a crawler crane, in which the upper swing body 3 is rotatably mounted on a lower traveling body 2, and a boom 4 is erected up and down in front of the upper swing body 3. A gantry 5 is provided at the rear of the gantry 5, and a wire rope 6 fed from a winch (not shown) installed on the upper revolving structure 3 is hung around a sheave 7 provided on the upper end of the gantry 5 to The boom 4 is locked to the upper end of the boom 4, and the boom 4 is configured to perform a hoisting motion by the hoisting and unwinding operations of the wire rope 6, and another winch (not shown) installed on the upper swing body 3 is used. (Not shown)
The wire rope 8 drawn out from is hung around the sheave 9 provided at the upper end of the boom 4 to suspend the hook 10.

As shown in FIG. 6, the boom foot 11, 11 located below the boom 4 is connected to a boom foot bracket 12 fixed to the upper swing body 3 via a boom foot pin 13, and the boom foot pin 13 is connected to the boom foot bracket 12. The foot pin 13 is provided with a boom foot pin attaching / detaching device 14.

The boom foot pin attaching / detaching device 14 is connected to the boom foot pin 13 and is connected to the boom foot pin 13.
Hydraulic cylinder 15 for attaching and detaching, and the hydraulic cylinder 15
And a substantially cylindrical cylinder bracket 16 for fixing the boom foot 11 to the boom foot 11. The cylinder bracket 16 has a flange 17 provided at one end of the cylinder bracket 16 secured by bolts 18, 18 ... Screwed to the hydraulic cylinder 15
Is an annular body 20 in which a flange 19 provided on the hydraulic cylinder 15 is provided at the other end of the cylinder bracket 16.
Are screwed to the bolts 21, 21 ...

The boom foot pin 13 is attached to and detached from the holes 11a, 11a formed in the boom foot 11, 11 and the hole 12a formed in the boom foot bracket 12 by the expansion and contraction of the hydraulic cylinder 15. The boom foot pin 13 is configured so that the tip portion 13a of the boom foot pin 13 projects to the outside of the boom foot 11 when the boom foot pin 13 is mounted. A boss portion 11b that supports the protruding tip portion 13a is fixedly provided to the boom foot 11, and a pin 22 is inserted through the boss portion 11b and the boom foot pin 13 to insert the boom foot pin 13 into the boom foot pin 13. It is configured to prevent the slipping and rotation of the.

FIG. 7 shows another boom foot pin attaching / detaching device 23. The boom foot pin attaching / detaching device 23 is provided with a notch in the upper rear end portion of the boom foot pin 24 in order to prevent the boom foot pin 24 from coming off. The portion 24a is formed,
When the boom foot pin 24 is attached to the boom foot 11 and the boom foot bracket 12, the notch 24
A flat plate-shaped key plate 25 is brought into contact with a to fasten the key plate 25 to the flange 17 of the cylinder bracket 16 with bolts 26, 26, thereby restraining the movement of the boom foot pin 24, and the boom. The foot pin 24 is prevented from coming off and the boom foot pin 2 is
4 is configured to prevent rotation.

Although not shown in the drawings, there is also known a boom foot pin attaching / detaching device having an indicator which slides together with the boom foot pin in order to confirm the connected state of the boom foot pin.

[0008]

In the boom foot pin attaching / detaching device for the construction machine of the above-mentioned conventional example, when the boom foot pin is mounted, the tip of the boom foot pin is projected to the outside of the boom foot, and the boom foot pin is projected. The boom foot pin is configured to be inserted through the tip of the boom foot pin and the boss portion provided on the boom foot to prevent the boom foot pin from coming off and rotating.

However, since the boom foot pin attaching / detaching device projects the boom foot pin to the outside of the boom foot, it often causes a space problem.

Further, in another boom foot pin attaching / detaching device, when the boom foot pin is mounted, the key plate is brought into contact with the notch of the boom foot pin and the key plate is bolted. It is configured to prevent the boom foot pin from coming off and prevent the boom foot pin from rotating.

However, the boom foot pin attaching / detaching device has a problem in workability because it requires the work of preparing a key plate and attaching the key plate with a bolt.

Therefore, in the boom foot pin attaching / detaching device of the construction machine, there is a technical problem to be solved in order to easily prevent the boom foot pin from rotating and coming off without causing a space problem. The present invention aims to solve this problem.

[0013]

SUMMARY OF THE INVENTION The present invention has been proposed in order to achieve the above object, and a boom foot pin for connecting a boom foot and an upper swing body of a construction machine is attached and detached by using an inserting means. In a boom foot pin attachment / detachment device of a construction machine configured to perform, an indicator for confirming a connection state of the boom foot pin is fixed to the boom foot pin, and means for restraining the indicator is provided. A boom foot pin attachment / detachment device for a construction machine configured to restrict the movement of the boom foot pin by restricting the indicator by the restricting means when the boom foot pin is mounted.
A boom foot pin attachment / detachment device for a construction machine, wherein a boom foot pin for connecting a boom foot of a construction machine and an upper swing body is attached / detached using an insertion means. While fixing the indicator for confirming the connection state of the pins,
A means for fixing a restrained member that slides integrally with the boom foot pin to the boom foot pin and restraining the non-restraining member is provided, and when the boom foot pin is mounted, the restraining means causes the restraint means to restrain the restraint member. A boom foot pin attaching / detaching device of a construction machine configured to restrict the movement of the boom foot pin by restraining a restraining member, and
Provided is a boom foot pin attaching / detaching device for a construction machine, in which the indicator is provided at an end portion of the boom foot pin on the insertion means side, and a boom foot pin attaching / detaching device for a construction machine, in which the restraining means is a detachable pin. It is a thing.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail below with reference to FIGS. For convenience of description, the same components as those of the conventional example will be designated by the same reference numerals and the description thereof will be omitted. 1 is a front view of a boom foot pin attaching / detaching device of a construction machine, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line BB of FIG. 1 to 3, 2
Reference numeral 7 denotes a boom foot located below the boom 4, and the boom foot 27 is connected to boom foot brackets 28, 28 fixed to the upper swing body 3 via a boom foot pin 29, and the boom foot pin 29 has a boom. A foot pin attaching / detaching device 30 is provided. In the figure,
Reference numeral 31 is a plate integrally fixed to the boom foot 27.

Then, the boom foot pin attaching / detaching device 3
Reference numeral 0 denotes a hydraulic cylinder 15 as an insertion means that is connected to the boom foot pin 29 to attach and detach the boom foot pin 29, and a substantially cylindrical cylinder bracket for fixing the hydraulic cylinder 15 to the boom foot bracket 28. 32, the cylinder bracket 32 is screwed to the boom foot bracket 28 by fastening a flange 33 provided at one end of the cylinder bracket 32 to the boom foot bracket 28, and the hydraulic cylinder 15 is attached to the hydraulic cylinder 15. The flange 19 provided on the annular body 20 arranged at the other end of the cylinder bracket 32 is fixed to the bolt 2
1, 21 ... are screwed together. It should be noted that instead of the hydraulic cylinder 15, other means such as a combination of an electric motor and a screw may be used as the inserting means.

Further, an indicator 35 for confirming the connected state of the boom foot pin 29 is fixed to the rear end of the boom foot pin 29 (the end portion on the hydraulic cylinder 15 side).

The indicator 35 is, as shown in FIG.
The indicator portion 3 includes an annular portion 36 and an indicator portion 37 provided so as to project from the upper portion of the annular portion 36.
Reference numeral 7 is composed of a protrusion 36a formed by the annular portion 36 protruding upward, and a plate 38 standing upright from the upper portion of the annular portion 36 to the protrusion 36a.

On the other hand, in FIGS. 1 to 3, a slit 39 is formed in the cylinder bracket 32 in the axial direction for allowing the indicator portion 37 of the indicator 35 to project and slide.

Further, on the flange 33 of the cylinder bracket 32 with which the indicator portion 37 slides and abuts, a pair of brackets 40, 40 are provided upright near the abutting position.

Pin holes 41, 41 are formed in the brackets 40, 40 so as to face each other, and the pin holes 41, 41 are formed.
By inserting the pin 42 as a restraint means into the
It is configured to restrain the indicator portion 37 and regulate the movement of the boom foot pin 29.

Thus, the boom foot pin attaching / detaching device 3
0, when the boom foot pin 29 is inserted, the boom foot pin 29 of the boom foot 27 is
The insertion hole 27a, the boom foot bracket 28,
Boom foot pin 29 insertion holes 28a, 28
When the hydraulic cylinder 15 is extended after aligning with a, the boom foot pin 29 causes the boom foot 2 to move.
7 hole 27a and the boom foot brackets 28, 2
The holes 28a, 28a of No. 8 can be confirmed by the indicator portion 37 protruding from the slit 39 of the cylinder bracket 32.

When the boom foot pin 29 is sufficiently mounted and the indicator portion 37 abuts on the flange 33 of the cylinder bracket 32, the pin holes 41, 41 of the pair of brackets 40, 40 are fitted in the pin holes 41, 41. Four
2 is inserted to restrain the movement of the indicator portion 37.

As a result, the indicator portion 37 can function as an indicator and can prevent the boom foot pin 29 having the indicator portion 37 fixed thereto from coming out and rotating. Further, since the boom foot pin attaching / detaching device 30 can restrain the indicator portion 37 only by inserting the pin 42, the workability is good and the space is not obstructed.

Furthermore, when the boom foot pin 29 is pulled out from the mounted state, the pin 42 is pulled out, and the hydraulic cylinder 15 is contracted.
Is extracted from the hole 27a of the boom foot 27 and the holes 28a, 28a of the boom foot brackets 28, 28, and the extracted state can be confirmed by the movement of the indicator portion 37. Therefore, the pin 4
Since the boom foot pin 29 can be pulled out only by pulling out 2, the work is extremely easy.

Although not shown in the drawings, an indicator is attached to the boom foot pin, and a constrained member such as a plate that slides integrally with the boom foot pin is fixed to the boom foot pin, and the non-restraint is provided. A boom foot pin attachment / detachment device comprising means for restraining a member, wherein when the boom foot pin is mounted, the movement of the boom foot pin is restrained by restraining the restrained member by the restraining means. It may be configured.
Even in that case, the same effect as that of the boom foot pin attaching / detaching device 30 can be obtained. Then, for example, the pin 42 can be used as the restraint means, but other means can also be used.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified one.

[0027]

As described in detail in the above one embodiment, the invention of claim 1 is a boom foot pin attaching / detaching device for a construction machine, wherein the boom foot pin is connected to the boom foot pin. An indicator for confirmation is fixedly provided, and a means for restraining the indicator is provided, and when the boom foot pin is mounted, the movement of the boom foot pin is regulated by restraining the indicator by the restraining means. Since the indicator has a function as an indicator, the boom foot pin on which the indicator is fixed can be easily prevented from rotating and coming off by restraining the indicator, and the boom foot pin can be attached and detached. The device does not hinder space.

According to a second aspect of the present invention, in a boom foot pin attaching / detaching device for a construction machine, an indicator for confirming a connected state of the boom foot pin is fixedly mounted on the boom foot pin, and the boom foot pin is attached. A means for fixing the restrained member that slides integrally with the boom foot pin to the foot pin and restraining the non-restraining member is provided, and when the boom foot pin is mounted, the restraining means causes the restrained member to be restrained. Since the movement of the boom foot pin is restricted by restraining the restraint of the boom foot pin, the indicator functions as an indicator, and the restrained means restrains the restrained member to fix the restrained means. The boom foot pin can be easily prevented from rotating and coming off, and the boom foot pin attaching / detaching device is space-saving. Nor hinder.

Further, in the invention according to claim 3, since the indicator is provided at the end portion of the boom foot pin on the insertion means side, the same effect as that of the invention according to claim 1 or 2 can be expected.

Furthermore, in the invention according to claim 4, since the restraint means is a detachable pin, the same effect as that of the invention according to claim 1, 2 or 3 can be expected, and the restraint and restraint by the restraint means can be expected. It is an invention that has a truly remarkable effect such as being extremely easy to release.

[Brief description of drawings]

FIG. 1 is a front view of a boom foot pin attaching / detaching device for a construction machine according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

3 is a sectional view taken along line BB of FIG.

FIG. 4 (a) is a front view of the indicator of FIG. (B) The side view of the indicator of FIG.

FIG. 5 is a side view of a crawler crane showing a conventional example.

FIG. 6A is a vertical cross-sectional view of a boom foot pin attaching / detaching device showing a conventional example. (B) The CC arrow line view of Fig.6 (a).

FIG. 7 (a) is a view on arrow D-D of FIG. 7 (b). (B) A vertical sectional view of a boom foot pin attaching / detaching device showing another conventional example.

[Explanation of symbols]

3 Upper revolving structure 27 Boom Foot 29 Boom Foot Pin 30 Boom foot pin attachment / detachment device 35 indicator 42 pin

Claims (4)

(57) [Claims] 1. A boom foot pin attaching / detaching device of a construction machine, wherein a boom foot pin for connecting a boom foot of a construction machine and an upper swing body is attached / detached using an inserting means. An indicator for confirming the connection state of the boom foot pin is fixed to the pin, and means for restraining the indicator is provided, and when the boom foot pin is mounted, the indicator is restrained by the restraining means. A boom foot pin attachment / detachment device for a construction machine, characterized in that the movement of the boom foot pin is regulated by the above. 2. A boom foot pin attaching / detaching device of a construction machine, wherein a boom foot pin for connecting a boom foot of a construction machine and an upper swing body is attached / detached by using an inserting means. An indicator for confirming the connection state of the boom foot pin is fixed to the pin, a restrained member that slides integrally with the boom foot pin is fixed to the boom foot pin, and the non-restraining member is restrained. Means for controlling the movement of the boom foot pin by restraining the restrained member by the restraining means when the boom foot pin is mounted. Foot pin removal device. 3. The boom foot pin attaching / detaching device for a construction machine according to claim 1, wherein the indicator is provided at an end portion of the boom foot pin on the insertion means side. 4. The boom foot pin attaching / detaching device for a construction machine according to claim 1, wherein the restraint means is a detachable pin.