JPH11131824A - Crusher and working machine having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the application of excessive forces to a crusher and a hydraulic shovel type working machine by preventing the application of stresses when crushing blades catch and crush a concrete part. SOLUTION: A crusher A has a mounting base 1 and a moving base 2, with a mounting bracket 10 hanging from the top of the mounting base 1. A guide part 11 is formed at the lower part of the mounting base 1, and the moving base 2 has a guide shaft 20. The guide shaft 20 is slidably guided to the guide part 11. A moving base main body 21 is provided at one end of the guide shaft 20. A stopper member 22 is provided at the other end of the guide shaft 20. The moving base main body 21 has a hydraulic cylinder 3 and has a pair of crushing blades 40 provided at its top. The crushing blades 40 can be opened and closed by the expansion and contraction of the hydraulic cylinder 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher which is used by attaching it to the tip of an arm of a working machine such as a hydraulic excavator when disassembling an aged concrete structure. The present invention relates to a work machine provided with the apparatus. More specifically, the stress generated in the direction in which the crushing blade is drawn to the crushed portion when the crushing blade is crushed across the crushed portion is eliminated, so that an unreasonable force does not reach the crushing machine and the working machine having the same. It was done.

[0002]

2. Description of the Related Art Conventionally, crushers have been used for demolition work of aged concrete structures. The crusher is
The crushing blade is provided with a pair of crushing blades, and the crushing blade is closed at the front end side to crush the portion to be crushed.

[0003] As the crusher described above, there are generally known a crusher of a type used by an operator while holding it and a type of crusher used by being attached to the tip of an arm of a working machine such as a hydraulic shovel system. ing. These are used properly according to the environment in which the work is performed. In this specification, the latter will be mainly described below.

FIG. 5 shows an example of a conventional crusher used by being attached to the tip of an arm of a hydraulic shovel type working machine. The crusher 6 includes an attachment base 60 having an attachment fitting 600 for attachment to the tip of the arm of the hydraulic shovel-based working machine. The attachment base 60 has an upper plate 610 and a lower plate (not shown in the drawing) provided at required intervals, and a support base 61 rotatable in the circumferential direction is attached. The supporting base 61 is provided with a pair of crushing blades 62 having a symmetrical shape. The crushing blade 62 is driven by a hydraulic cylinder 63 provided between the upper plate 610 and the lower plate of the support base 61, and the shaft pins 64, 6 provided on the front side of the support base 61.
The front side can be opened and closed with the center of rotation 4. The crusher 6 is provided with an attachment metal 600 for attaching the attachment base 60 to the tip of the arm of the hydraulic shovel-based working machine.
It is attached via an attachment pin or the like. An oil pipe is connected to the hydraulic cylinder 63 that drives the crushing blade 62, but is omitted in the figure.

[0005]

However, the conventional crusher as described above has the following problems. The conventional crusher 6 operates the hydraulic cylinder 63 and
The crushing blade 62 is crushed by closing the crushing blade 62 with the shaft pin 64 provided on the front side of the shaft 1 as a rotation center and sandwiching the crushed portion.

FIG. 6 is a schematic diagram showing the opening / closing drive state of the leading end side of the crushing blade and the moving state of the crushing machine when the crushed portion to be crushed by the crushing machine is a stationary one such as a building. FIG. In FIG.
Is the crushing blade 62 when the crushing blade 62 sandwiches the portion to be crushed.
3 shows the distance in the vertical direction between the front end of the crushing blade 62 and the shaft pin 64 serving as the center of rotation of the crushing blade 62. Further, in (b), the symbol L4 is the pivot point of the tip side of the crushing blade 62 and the rotation center of the crushing blade 62 when the crushing blade 62 is rotated from the state of (a) to crush the portion to be crushed. The vertical distance from the shaft pin 64 is shown. It should be noted that the “front side” is not a concept that points to a required point, and therefore cannot be clearly shown in the drawing. Therefore, in this drawing, the length of the distance between L3 and L4 is determined by determining a required location for convenience.

A comparison of the lengths of L3 and L4 with FIG. 6 shows that L4 is clearly shorter than L3. This indicates that when the crushing blade 62 rotates inward, the distance between the tip of the crushing blade 62 and the shaft pin 64 decreases. When the tip side of the crushing blade 62 crushes the crushed portion,
The tip side of the crushing blade 62 is in a state of being substantially fixed to the crushed portion. That is, when the tip side of the crushing blade 62 crushes the crushed portion, not only the shaft pin 64 but also the support base 61 and the attachment base 60 having the same are in L3 and L4 from the state before crushing. It is drawn to the above-mentioned crushed portion side by the difference distance and tries to move (see FIG. 6 (b)).

When the crushed portion to be crushed by the crusher 6 does not move, such as a building, the crusher 6 moves the crushed portion by a distance equal to the difference between L3 and L4 in FIG. Since the crusher 6 is drawn to the crushing portion and is likely to move, considerable stress is generated in the crusher 6. Therefore, the crusher 6 was fragile and difficult to extend its life.

The stress generated in the crusher 6 is also transmitted to a hydraulic shovel-based working machine to which the crusher 6 is attached. In some cases, this stress acts as an excessive force on the arm or the boom that is a drive system, and this may damage the relevant portion.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is intended to prevent the above-mentioned stress from being generated when a crushing blade crushes a concrete portion, and to provide a crushing machine and a hydraulic shovel system having the same. It is an object of the present invention to provide a crusher for preventing an excessive force from being applied to a working machine such as the above, and a working machine having the same.

[0011]

Means of the present invention taken to achieve the above object are as follows. According to a first aspect of the present invention, there is provided a crusher used by being attached to a tip of an arm of a work machine, wherein the attachment base has attachment means for attaching to the tip of an arm of the work machine; A moving base movably provided on the base, crushing means provided on the moving base, and closing and rotating the tip side inward to crush the portion to be crushed, and opening and closing the crushing means And a driving means for rotating, wherein the movable base is moved in a direction to be drawn toward the crushed portion when the crushing device crushes the crushed portion. Crusher.

According to a second aspect of the present invention, there is provided a crusher used by being attached to a tip of an arm of a work machine, wherein the attachment has attachment means for attaching to the tip of an arm of the work machine, and an attachment having a guide portion. The base and the slide body are inserted through the guide portion, and the movable base is movably provided on the attachment base, and the movable base is provided on the movable base, and the distal end side is closed and rotated inward, whereby: A crushing means for crushing the crushed portion, and a driving means for opening and closing the crushing means, wherein the movable base is crushed when the crushing means crushes the crushed portion. Characterized in that it is moved in a direction to be drawn toward the crushing point side,
It is a crusher.

According to a third aspect of the present invention, there is provided a working machine equipped with a crusher, wherein the working machine is provided with the crusher according to the first or second aspect.

The "crushed portion" is a concept indicating a portion to be crushed by a crusher, and mainly refers to a portion formed of concrete.

[0015]

[Operation] When the crushing means is used to crush the crushed area, the moving base is moved in a direction to be drawn to the crushed area. Therefore, the crushed area to be crushed by the crusher is, for example, a building. Even in the case of an immovable object such as an object, the attached base is not drawn to the crushed portion unlike the conventional crusher, and no excessive force is generated in the crusher. Therefore, the crusher according to the present invention is hard to break and can be long-lasting. Consequently, the working machine provided with the same can also improve the durability.

[0016]

Embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of the crusher according to the present invention. Reference symbol A indicates a crusher. The crusher A has an attachment substrate 1. On the upper side of the attachment base 1, an attachment fitting 1 as attachment means for attaching to a tip of an arm of a working machine such as a hydraulic shovel system.
Numerals 0 and 10 are provided at two places with a required interval.

Attachment fittings 10 have two attachment holes 100 for inserting attachment pins P1 for connecting the crusher A to a working machine such as a hydraulic shovel system. On the lower side of the mounting base 1, a guide portion 11 is formed to slidably pass a guide shaft 20, which is a slide body provided on the moving base 2. Inside the guide portion 11, a front portion and a rear portion are open, and a guide shaft insertion portion 110 formed in a substantially rectangular tube shape is formed. Notch portions 11 are formed on both front side surfaces of the guide portion 11 so that the flexible oil pipes F1 and F1 passing through the inside of the guide shaft 20 do not contact the outer edge of the guide portion 11.
1,111 are formed.

The movable base 2 is provided with the guide shaft 20 which is slidably guided in the guide shaft insertion portion 110 as described above. The length of the guide shaft 20 is set to be longer than the entire length of the guide shaft insertion portion 110 described above. In addition, the outer shape of the guide shaft 20 is formed in a substantially quadrangular prism shape so that the inner shape of the guide shaft insertion portion 110 does not substantially rattle.

At one end in the axial direction of the guide shaft 20, a movable base body 21 is provided rotatably in the circumferential direction via a swivel joint S (details of the structure are omitted).
The moving base body 21 is provided with an upper plate 2 provided at a required interval.
11 and a lower plate 212. The guide shaft 20 is provided at the other end in the axial direction of the guide shaft 20 so as to be inserted through the guide shaft insertion portion 110. Even when the movable base 2 slides, the guide shaft insertion portion 11 is provided.
Stopper member 2 so that it does not come off from zero
2 is provided detachably. Note that, in the present embodiment, the movable base body 21 can be rotated forward and backward in the circumferential direction by, for example, human power without using power such as hydraulic pressure or electricity. However, the present invention is not limited to this, and the movable base body 21 may be configured to be rotatable in the circumferential direction by using, for example, the power described above.

The above-described flexible oil pipe F1,
One end of F1 is connected to the above-described swivel joint S through the inside of the guide shaft 20, and the other end is connected to a hydraulic pump device (not shown) for applying pressure to supplied oil.

The upper plate 211 and the lower plate 21 of the movable base body 21
2 is provided with a hydraulic cylinder 3 that can be extended and contracted in a direction orthogonal to the axial direction of the guide shaft 20. A pair of symmetrical crushing blades 40, 40, which are crushing means, are rotatably supported at the leading end of the movable base body 21 by axial pins 210, 210, whose intermediate portions are arranged side by side. It is attached. The base end of the crushing blades 40, 40 is connected to the rod 3 of the hydraulic cylinder 3 via the pins 41, 41.
0 and the base end of the cylinder 31. With the above configuration, the crushing blades 40, 40 can be driven to open and close by operating the hydraulic cylinder 3 to expand and contract.

Symbols F2 and F2 denote flexible oil pipes, one end of which is connected to the above-mentioned hydraulic cylinder 3 and the other end of which is connected to the above-mentioned swivel joint S. That is, the flexible oil pipes F2, F
Reference numeral 2 is connected to the above-described flexible oil pipes F1 and F1 via a swivel joint S.

FIG. 2 shows the opening / closing drive state of the leading end side of the crushing blade and the moving state of the movable base when the crushing machine shown in FIG. 1 crushes a crushed part in an immovable place such as a building. FIG. 3 is an explanatory view of a hydraulic shovel-based working machine provided with the crusher shown in FIG. 1, and FIG. 4 is an explanatory view showing a rotary connecting device. The crusher A described in detail above is a hydraulic shovel-based working machine K as a working machine.
Of the arm R is mounted via a rotary connecting device 5. In the present embodiment, the work machine is of a hydraulic shovel type, but is not limited to this.

The rotary connection device 5 will be briefly described with reference to FIGS. The rotation coupling device 5
It comprises a rotating shaft (not visible in the figure) and two disks 50a, 50b connected by the rotating shaft. Attachment pieces 51 and 5 on the outer surface of one of the disks 50a so as to be connectable to the tip of the arm R of the hydraulic shovel-based working machine K.
1 are vertically suspended at a required interval. On the outer surface of the other disk 50b, attachment pieces 52, 52 that can be connected to the attachment fitting 10 of the crusher A are vertically provided at a required interval. The attachment pieces 51, 51 are provided with attachment holes 510, 510 for inserting the attachment pins P2, respectively.
2, mounting holes 520 through which the mounting pins P1 are inserted,
520 are formed in two places (see FIG. 4).

At a required position of the disk 50a, a screw fastener 500 having a thread groove formed therein is fixed so as to protrude slightly upward from the surface. A bolt 501 is screwed to the screw fitting 500. At the place where the screw fastener 500 is provided on the disk 50a, a bolt 501 is screwed into the through-hole 50 so that the disk 50a can be penetrated.
2 are provided. Also, a plurality of through holes 503 are provided on the lower disk 50b at positions corresponding to when the bolts 501 are screwed in over the entire circumference.

In this embodiment, the crusher A is
Although it is attached to the hydraulic excavator-based working machine K via the rotary connecting device 5, the rotary connecting device 5 is appropriately used as needed, so the mounting method of the crusher A is limited to this. Not something. Therefore, the attachment 10 of the crusher A may be directly attached to the tip of the arm R of the hydraulic shovel-based working machine K without using the rotary connection device 5 or the like.

(Operation) The operation of the embodiment of the present invention will be described with reference to FIGS. The crusher A crushes the crushed portions by sandwiching the crushed portions with the crushing blades 40 in such a state that the moving base 2 can move in the direction of being drawn to the crushed portions along the attachment base 1. Of FIG.
In (a), the symbol L1 indicates the tip side of the crushing blades 40 and 40 and the crushing blade 4 when the crushing blades 40 and 40 sandwich the crushed portion.
The vertical distance between the shaft pins 210 and 210, which are the rotation centers of 0 and 40, is shown. In FIG. 3B, reference numeral L2 denotes the tip side of the crushing blades 40, 40 when the crushing blades 40, 40 are rotated from the state of FIG. Shaft pin 21 which is the center of rotation of
0, 210 in the vertical direction.

When the lengths of L1 and L2 are compared, it can be seen that L2 is clearly shorter than L1 also in the case of the crusher A as shown in the section of the prior art. However, crusher A
Is provided with a slidable moving base 2,
Since the guide shaft 20 of the movable base 2 is slidably inserted into the guide insertion portion of the guide portion 11, the crushing blade 4
When 0 and 40 are crushed with the crushed portion interposed therebetween, even if they are drawn to the crushed portion, only the movable base 2 is drawn in the direction. In other words, unlike the conventional crusher, the attachment substrate 1 is not drawn to the crushed portion, and no unreasonable stress is generated in the crusher A. Therefore, the crusher A is hard to break and can be made to last. As a result, the durability of the hydraulic shovel-based working machine K can be improved.

In the crusher A shown in this embodiment,
In particular, since it is attached to the tip of the arm R of the hydraulic excavator-based working machine K via the rotary connecting device 5, the rotary connecting device 5 can also rotate in the circumferential direction. Therefore,
The setting of the direction of the crusher A is easier and the operation is easier than when the rotary connection device 5 is not provided, and the workability can be improved.

The rotary coupling device 5 rotates the crusher A to a required position about the rotation axis so that the crushed portion can be sandwiched, and screws the bolt 501 provided on the disk 50a into a circular shape. Crusher A can be fixed by penetrating through hole 503 formed in disk 50b through through hole 502 formed in plate 50a. In order to release the fixation of the crusher A and to rotate the crusher A to another position, the bolt 501 may be turned in a direction in which the bolt 501 comes off.

The terms and expressions used in the present specification are merely illustrative and not restrictive, and terms and equivalents of the features described in this specification and some of them are used. There is no intention to exclude expression. It goes without saying that various modifications are possible within the scope of the technical idea of the present invention.

[0032]

The present invention has the above configuration and has the following effects. When the crushing means crushes the crushed portion across the crushed portion, the moving base is moved in a direction to be drawn to the crushed portion, so that the crushed portion to be crushed by the crusher is, for example, a building or the like. Even when the crusher does not move, the attached base is not drawn to the crushed portion unlike the conventional crusher, and no excessive force is generated in the crusher. Therefore, the crusher according to the present invention is hard to break and can be long-lasting. In turn,
A working machine equipped with the same can also improve durability.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a crusher according to the present invention.

FIG. 2 shows the opening / closing drive state of the tip side of the crushing blade and the moving state of the movable base when the crushing machine shown in FIG. 1 crushes a crushed part in a place that does not move, such as a building. FIG.

FIG. 3 is an explanatory view of a hydraulic shovel-based working machine including the crusher shown in FIG. 1;

FIG. 4 is an explanatory view showing a rotary connection device.

FIG. 5 is an explanatory view showing an example of a conventional crusher attached to the tip of an arm of a hydraulic shovel-based working machine.

FIG. 6 is a schematic explanatory view showing the opening / closing drive state of the leading end side of the crushing blade and the moving state of the crusher when the crushed portion to be crushed by the crusher is a stationary part such as a building.

[Explanation of symbols]

 Reference Signs List A crusher K hydraulic excavator-based working machine P1, P2 Mounting pin F1, F2 Flexible oil pipe S Swivel joint R arm 1 Mounting base 10 Mounting bracket 100 Mounting hole 11 Guide section 110 Guide shaft insertion section 111 Notch 2 Moving Substrate 20 Guide Shaft 21 Moving Substrate Main Body 210 Shaft Pin 211 Upper Plate 212 Lower Plate 22 Stopper Member 3 Hydraulic Cylinder 30 Rod 31 Cylinder 40 Crushing Blade 41 Pin 5 Rotary Connection Device 50a, 50b Disk 500 Screw Bolt 502 Through hole 503 Through hole 51 Attachment piece 510 Attachment hole 52 Attachment piece 520 Attachment hole 6 Crusher 60 Attachment base 600 Attachment fitting 61 Support base 610 Upper plate 62 Crusher blade 63 Hydraulic cylinder 64 Axle pin

Claims (3)

[Claims] 1. A crusher used by being attached to a tip of an arm of a work machine, comprising: an attachment base (1) having attachment means for attaching to a tip of an arm of the work machine; The moving base (2) movably provided on (1)
A crushing means provided on the moving base (2), the crushing means being crushed across the crushed portion by closing and rotating the tip side inward, a driving means for opening and closing the crushing means, Wherein the moving base (2) is adapted to move in a direction to be drawn toward the crushed portion when the crushing means is crushed across the crushed portion, Machine. 2. A crusher used by being attached to the tip of an arm of a work machine, comprising: an attachment means for attaching to the tip of an arm of the work machine; and an attachment base (1) having a guide portion (11). A movable body (2) movably provided on the attachment body (1) by inserting a slide body through the guide portion (11); and a movable body (2) provided on the movable body (2). The moving base (2) is provided with: a crushing means for crushing the portion to be crushed by closing and rotating the crushing means inward, and a driving means for opening and closing the crushing means. A crusher, characterized in that the crusher moves in a direction to be drawn toward the crushed portion side when the means crushes across the crushed portion. 3. A work machine equipped with a crusher, wherein the work machine is provided with the crusher according to claim 1 or 2.