JPH0447256Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a side ditch excavator with an earth removal plate device, which is equipped with a side ditch digging mechanism and an earth removal mechanism for removing excavated earth and sand.

[Conventional technology]

FIGS. 6 to 12 show a conventional hydraulic excavator as a side ditch excavator equipped with an earth removal plate device.

In the figure, 1 is an undercarriage having a frame 1A and a track 1B, 2 is an upper revolving body rotatably mounted on the undercarriage 1, and the upper revolving body 2 is
A box-shaped operator's cab 3 is provided on the front left side of the vehicle.

Reference numeral 4 denotes a trench front which is located on the side of the driver's cab 3 and is movable up and down in the center of the upper revolving body 2, and the base end side of the front 4 is pivoted to the center of the upper revolving body 2; A lower boom 5 that can be rotated upward and downward, an atsupah boom 6 that is pivotally attached to the tip side of the lower boom 5 and can be rotated in the left and right direction of the upper revolving structure 2, and an atsupah boom 6 that is pivoted to the tip of the atsupah boom 6. The arm stay 7 is movable in the left-right direction while being held parallel to the lower boom 5 by a link mechanism (not shown), and the base end side is pivoted to the distal end side of the arm stay 7, and the arm stay 7 is movable in the vertical direction. It has an arm 8 which is rotatable, and an excavation bucket 9 which is pivotally attached to the distal end side of the arm 8.

10 is a boom cylinder provided between the lower boom 5 and the upper revolving structure 2 for rotating the lower boom 5; 11 is an offset cylinder for rotating the upper boom 6 (see FIGS. 9 and 10);
The end of the tube 11A of the offset cylinder 11 is pivotally attached to a mounting bracket 5A protruding from the side surface of the tip side of the lower boom 5 via a connecting shaft 12, and the tip of a piston rod 11B that protrudes from the tube 11A so as to be movable forward and backward is It is pivotally attached to a mounting bracket 6A protruding from the side surface of the top end side of the upper boom 6 via another connecting shaft 13. Further, an arm cylinder 14 for vertically rotating the arm 8 is provided between the arm stay 7 and the arm 8, and a bucket cylinder 16 is connected between the arm 8 and the bucket 9 via a parallel link 15. is provided.

Reference numeral 17 denotes a bucket belt 9 which can be moved from a position A at the center of the upper revolving structure 2 to positions A ₁ and A ₂ in the left and right directions by driving the offset cylinder 11. This is a stopper member for restricting movement to position ₁ , and the stopper member 17 is an elongated member having a shaft hole (not shown) on the proximal end side and a long hole 17A as an escape hole on the distal end side. It consists of a flat plate (see Figures 8 and 9). The stopper member 17 has its proximal end rotatably fitted into one of the connecting shafts 12 that pivotally supports the offset cylinder 11, and the stopper member 17 has a long hole 17A on its distal end.
is slidably inserted into the other connecting shaft 13 that pivotally supports the offset cylinder 11, and is removably held by nuts 18, 18 screwed onto the respective connecting shafts 12, 13. There is.

On the other hand, reference numeral 19 denotes a soil removal plate device located in front of the driver's cab 3 and provided on the undercarriage body 1. As shown in FIG. Fixed mounting bracket 19A, 1
A pair of left and right blade stays 19B, 19B consisting of a long plate body pivoted on the base end side of the blade stay 9A,
A cylindrical reinforcing member 19C installed near the tips of the blade stays 19B, 19B, a blade 19D for earth removal work fixed to the tips of the blade stays 19B, 19B, and a mounting bracket 19E fixed to the frame 1A. and a blade lifting cylinder 19G provided between the mounting bracket 19E fixed to the reinforcing member 19C.

The conventional technology is configured as described above, and its operation will be explained next. First, when performing ditch digging work, the upper boom 6 is rotated in the left-right direction of the upper rotating structure 2 by driving the offset cylinder 11, so that the arm stay 7 is moved parallel to the lower boom 5 by the link mechanism. The bucket belt 9 can move leftward and rightward of the upper revolving body 2 within the range from _A1 to A and _A2 as shown in FIG.

In addition, a boom cylinder 10, an arm cylinder 1
4 and the bucket cylinder 16, the bucket 9 performs excavation work in a working range B having a trajectory as shown in FIG.
The excavated earth and sand are removed by the blade 19D of the earth removal plate device 19.
It is now being excluded.

During the above-mentioned operation, the ditch digging front 4 is sometimes positioned above the upper revolving body 2 as shown in FIG. If the bucket belt 9 is offset to the position _A1 on the driver's cab 3 side in this state, there is a problem that the bucket truck 9 will hit the front upper part 3A of the driver's cab 3 in the area shown by diagonal lines in the figure. Therefore, the stopper member 17 restricts the range of movement of the upper boom 6 toward the left side, that is, toward the driver's cab 3, to prevent collision between the bucket 9 and the driver's cab 3.

[The problem that the idea aims to solve]

However, as described above, since the stopper member 17 restricts the leftward movement of the bucket 9 to a certain range, there is a problem that the working range in the leftward direction is narrower than when the stopper member 17 is not provided. For this reason, some users operate the hydraulic excavator by removing the stopper member 17 and expanding the working range in the left direction, assuming that the bucket 9 is operated within a range that does not interfere with the operator's cab 3. There is.

Accordingly, in the prior art, the stopper member 17 removed from the trench excavation front 4 as described above
Since there is no place to proactively store the stopper member 17, there is a drawback that the stopper member 17 gets lost during work, and in the case of a model in which the turning radius R of the upper revolving body 2 is set small, the long stopper member 17 is difficult to secure on the upper revolving structure 2 side.

Furthermore, if the driver is replaced with the stopper member 17 removed, the new driver may not notice that the stopper member 17 has been removed and the bucket 9 may be removed.
As a result, there is a problem in that the bucket 9 collides with the driver's cab 3 and the driver's cab 3 is damaged.

The present invention was devised in view of the above-mentioned drawbacks of the prior art.The present invention allows the removed stopper member to be easily stored, and also allows the driver to reliably visually confirm whether or not the stopper member is being used. It is an object of the present invention to provide a side ditch excavator with an earth removal plate device capable of preventing accidents.

[Means to solve the problem]

The feature of the means of the present invention constructed to solve the above-mentioned problems is that the stopper member removed from the lower boom and the upper boom is attached to and detached from the lower boom and the top boom at a position where it can be seen from the driver's cab. The present invention is provided with a stopper member storage device that can store the stopper member.

[Effect]

In case the stopper member that restricts the range of movement of the bucket in the left and right direction is removed, the earth removal plate device is provided with a stopper member storage device at a position that can be seen from the operator's cab. With this storage device, a long stopper member can be easily stored, and moreover, whether or not the stopper member is being used can be reliably visually confirmed from the driver's cab.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Note that the same reference numerals are given to the same components as those of the prior art described above, and the explanation thereof will be omitted.

1 and 2 show a first embodiment of the invention. In the figure, reference numeral 21 denotes a stopper member storage device for storing the stopper members 17 removed from the lower boom 5 and upper boom 6;
The blade stay 19B is installed on the back surface _19D1 of the blade 19D so that the driver can visually see it from the driver's cab 3.
It is located above 19B. 22
is a fixing part that constitutes the stopper member storage device 21, and the fixing part 22 has a bolt screwing hole and a boss 22A fixed to the back surface _19D1 of the blade 19D.
, a fixing bolt 22B that is removably screwed into a bolt threading hole of the boss 22A, and a washer 22C that is fitted into the fixing bolt 22B. On the other hand, the reference numeral 23 designates a hook as a locking portion located in the lateral direction of the fixing portion 22 and protruding from the back surface 19D ₁ of the blade 19D. It is shaped like a T. Then, only when the stopper member 17 is placed in a vertical position, the elongated hole 17A can be fitted into the engagement protrusion 23A of the hook 23, and when the stopper member 17 is placed in a horizontal position, it does not fall off from the hook 23. The hook 23 is an engagement protrusion 23A
is placed vertically.

The present embodiment is constructed as described above, and the functions of operating the ditch digging device 4 to excavate earth and sand with the bucket 9, and operating the earth removal plate device 19 to remove the earth and sand are substantially based on the conventional technology. There is no difference in terms.

According to this embodiment, the driver is in the driver's cab 3.
A stopper member storage device 21 is provided on the back surface ₁₉₁ of the blade 19D that can be seen from above. Therefore, when the operator removes the stopper member 17 from the lower boom 5 and upper boom 6 in order to operate the bucket belt 9 at the position _A1 on the operator's cab 3 side shown in FIG. The stopper member 17 can be stored on the back surface 19D ₁ of the blade 19D by the stopper member storage device 21 in the following manner.

That is, the fixing bolt 22B and washer 22C on the fixing portion 22 side of the storage device 21 are removed from the boss 22A. Next, after making the stopper member 17 vertical and fitting the elongated hole 17A into the hook 23, the stopper member 17 is laid down horizontally, and a washer 22C is inserted and fitted in advance into the shaft hole on the base end side. bolt 22
B and screw the bolt 22B onto the boss 22A. Thus, the stopper member 17
It is fixed on the back surface _19D1 of 9D so that it can be seen by the driver.

On the other hand, when using the stopper member 17,
It may be removed from the stopper member storage device 21 in the reverse order to that described above. The driver determines whether or not to use the stopper member 17 using the stopper member storage device 21.
This can be easily and reliably confirmed by visually observing the stopper member 17, so even if the driver is replaced, it is possible to reliably prevent misunderstanding whether or not the stopper member 17 is being used.

Next, FIGS. 4 and 5 show a second embodiment of the present invention, and the feature of this embodiment is that the stopper member storage device 31 is arranged in an earth removal plate device located in front of the driver's cab 3. 19 is provided on the inner surface of the blade stay 19B on one side.

Note that the fixing portion 32 constituting the stopper member storage device 31 has a boss 32 similar to that of the first embodiment.
A, a fixing bolt 32B, and a washer 32C, and the hook 33 is also formed in a substantially "T" shape with an engaging protrusion 33A as in the first embodiment, and the action of the storage device 31 is as follows. There is no substantial difference from that of the first embodiment.

As mentioned above, in the stopper member storage devices 21, 31 of any of the embodiments, the base end side of the stopper member 17 is provided with fixing bolts 22B, 32B and bosses 22A, 32.
A, and the distal end side is configured to be locked to the hooks 23, 33 using the elongated hole 17A, so the stopper member 17 can be easily attached and detached, and can be reliably stored. Moreover, it is possible to prevent the blade 19D from interfering with the soil removal work.

[Effect of idea]

The present invention is as described in detail above, and since the earth removal plate device is provided with a stopper member storage device that removably stores the stopper member removed from the front side of the trench excavation, in a position that can be seen from the operator's cab, the upper turning Even in the case of a type of ditch excavator with a small turning radius of the body, the stopper member can be easily stored and loss of the stopper member can be prevented. In addition, the driver can easily and reliably visually check the storage status of the stopper member from the driver's cab, so even if the driver is replaced, the driver can visually check whether the stopper member is being used before starting the operation. It is possible to reliably eliminate accidents that cause collisions.

[Brief explanation of the drawing]

Figures 1 to 3 relate to the first embodiment of the present invention, where Figure 1 is a plan view of the main parts showing the attachment relationship between the lower traveling body and the earth removal plate device, and Figure 2 is the same as in Figure 1. 3 is a sectional view in the direction of the - arrow in Fig. 1.
The enlarged cross-sectional view in the direction of the arrows, FIGS. 4 and 5, relate to the second embodiment of the present invention, and FIG. 4 shows the attachment relationship between the lower traveling body and the earth removal plate device in the same way as FIG. 1. A plan view of the main part, FIG. 5 is a sectional view in the direction of the - arrow in FIG. 4, and FIGS. 6 to 12 are related to the prior art.
FIG. 6 is a plan view of the hydraulic excavator, FIG. 7 is a left side view, and FIG. 8 is a configuration diagram showing the attachment relationship of the offset cylinder to the lower boom and upper boom.
Fig. 9 is a bottom view of Fig. 8, Fig. 10 is a right side view of Fig. 8, Fig. 11 is an explanatory diagram showing the reduced state of the offset cylinder at the same position as Fig. 10, and Fig. 12 is a lower part. It is a principal part top view which shows the attachment relationship of a traveling body and an earth removal board apparatus. 1... Lower traveling body, 2... Upper revolving body, 3...
Driver's cab, 5...Lower boom, 6...Atsupa boom, 7...Arm stay, 8...Arm, 9...
bucket, 17...stopper member, 19...earth removal plate device, 21, 31...stopper member storage device.

Claims (1)

[Scope of utility model registration request] a lower traveling body; an upper rotating body which is rotatably mounted on the lower traveling body and has a driver's cab on one side of its front portion; A side ditch excavation front in which the upper boom, arm stay, and arm are sequentially connected from the lower boom on the base end side, and the bucket belt attached to the tip of the arm is supported movably in the left and right directions, and the side ditch excavation front. a stopper member that is removably provided between the lower boom and the top boom and that restricts movement of the bucket to the driver's cab; and a soil removal plate that is located in front of the driver's cab and is provided on the lower traveling body. In the ditch excavator with an earth removal plate device, the earth removal plate device includes a stopper member storage device for removably storing the stopper members removed from the lower boom and the upper boom in a position visible from the operator's cab. A side ditch excavator with an earth removal plate device.