JPH0336594Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field to which the invention pertains The present invention relates to a bucket device with a holding frame for a civil engineering excavator that can perform clamping work in addition to normal excavation work.

(b) Prior art and its problems A bucket device with a holding frame is known as one of the design-purpose attachments for civil engineering excavators, which allows clamping work in addition to normal excavation work.

FIG. 1 is a side view showing an example of a conventional bucket tote device with a presser frame. In FIG. 1, a bucket main body 3 is pivotally attached to the tip of an arm 1 of a civil engineering excavator so that its lower end can swing, and is linked to the expansion and contraction operation of a tilt cylinder 2 (not shown) supported by the arm 1. An upper end stay portion 4 is pivotally attached to the tip of a cylinder rod 6 of the tilt cylinder 2 via an upper link 5 so as to be able to swing. The upper link 5 is connected to the arm 1 via a sub-link 7 which has one end pivotally attached to the arm and the other end pivotally attached to the upper link. In addition to the above, the device further includes a presser frame 8.
The presser frame 8 is a frame body having a generally rectangular opening corresponding to the opening surface 13 of the bucket main body 3, and one end thereof is placed on the pivot pin 10 between the bucket main body 3 and the arm 1 on the bucket main body 3. It is pivotally attached, and the other end is swingable to open and close with respect to the opening surface 13 of the bucket main body. One end of a lower link 9 is pivotally connected to a position below the pivot point of one end of the presser frame 8 to the bucket main body in order to swing the presser frame in conjunction with the operation of the tilt cylinder 2, and the other end of the lower link 9 is pivotally connected to sublink 7.

With the above configuration, the bucket main body 3 and the presser frame 8 can be simultaneously swung in opposite directions using the pin 10 as a common rotation axis by the expansion and contraction operation of the cylinder rod 6 of the tilt cylinder 2.

FIG. 2 is a diagram showing a swinging state of the bucket main body 3 and the presser frame 8 of the conventional bucket cart apparatus with a presser frame shown in FIG. When the cylinder rod 6 of the tilt cylinder 2 is most contracted, the bucket main body 3 and the presser frame 8 are in the most open state as shown in FIGS. 2A and 2A. When the cylinder rod 6 of the tilt cylinder 2 is extended, the bucket main body 3 and the presser frame 8 swing further through the positions shown at B and b, respectively, and reach the positions shown at C and c, where they are in closed contact with each other. At this time, cylinder rod 6 of tilt cylinder 2
Although it is at the intermediate stroke point and still has a margin for stroke, it can no longer extend because the bucket main body 3 and the presser frame 8 butt against each other and do not permit any further swinging of the two. When the cylinder rod 6 of the tilt cylinder 2 contracts in the opposite manner to the above, the bucket main body 3 and the presser frame 8 swing in the direction away from each other. Due to the above operation of the bucket body and presser frame,
Using this device, in addition to normal excavation work using only the bucket main body 3, clamping work using the bucket main body 3 and the holding frame 8 can be performed. The above-mentioned bucket belt device with a holding frame can be manufactured by adding the holding frame 8 and lower link 9 to the standard bucket device of a civil engineering excavator, and is significantly cheaper than purchasing a new attachment exclusively for clamping work. . Moreover, it has the advantage of being able to perform two operations, excavation and clamping, with one device.

However, the above-mentioned conventional bucket tote device with a presser frame had the following problems. That is, when performing normal excavation work with this device, for example, when the bucket main body 3 swings from position A to B in FIG. 2, the presser frame swings from position a to position b in the direction approaching the bucket main body. Moreover, the bucket body 3
Because it is not in a sufficiently open position with respect to the opening surface 13 of
The presence of the holding frame 8 may become an obstacle to excavation work, impairing work efficiency. Furthermore, when attempting to remove the presser frame 8 from the device so as not to become an obstacle to excavation work, the presser frame 8 and the bucket main body 3 are pivotally connected to the arm 1 by the same pin 10, so the presser frame 8 It was not possible to remove the bag alone, and it was necessary to remove both the bucket bag and the bag at the same time and then reassemble the bucket bag, making the removal work troublesome.

(c) Purpose of the invention The present invention was created in view of the above-mentioned conventional circumstances, and has the following objectives.

(1) To provide a bucket tote device with a presser frame that allows only the presser frame to be easily removed without removing the bucket body when the holding frame is removed to perform excavation work using only the bucket body.

(2) To provide a bucket apparatus with a presser frame in which the presence of the presser frame does not impede the excavation work and does not impair work efficiency even when excavation work is performed with the presser frame attached.

(d) Structure of the invention One end of the arm 1 of the civil engineering excavator is pivotally attached 11 to the tip of the arm 1, and a portion near the one end is pivoted to the tip of the cylinder rod 6 of the tilt cylinder 2 via an upper link 5. a holding frame 14 whose one end is pivotally mounted 12 on the bucket main body and whose other end can be opened and closed with respect to the opening surface 13 of the bucket main body; and one end is pivotally mounted on the arm. a sub-link 7 whose other end is pivotally connected to the upper link 5; one end is pivotally connected 20 to a position a predetermined distance from the pivot point 12 on the bucket main body of the presser frame 14; and a lower link 9 pivotally connected to the sub-link 7, and the movement of the links 5, 7, and 9 caused by the expansion and contraction of the cylinder rod 6 of the tilt cylinder causes the excavation operation of the bucket main body 3. In the bucket tote device with a presser frame in which the clamping action is performed by the bucket body and the presser frame, the first
The pivot shaft 12 is a straight line connecting the second pivot shaft 11 between the bucket main body 3 and the tip of the arm 1, and the third pivot shaft 20 between the lower link 9 and the presser frame 14. When the cylinder rod 6 is extended, it is located approximately on the side where the arm 1 is present, but when the cylinder rod is extended or contracted, it is located on the side where the first pivot shaft 12 is located.
rotates integrally with the bucket main body around the second pivot shaft 11 and moves toward the side substantially opposite to the side where the arm exists with respect to the connecting line, thereby connecting the first and second pivots. Compared to the case where the shafts 11 and 12 are coaxial, at least in the general excavation angle range of the bucket main body, the presser frame moves to a position that is more open to the bucket opening surface, and near that position, the presser frame They are arranged at predetermined positions shifted from each other so that the swing rate is smaller.

As a result, when the holding frame is removed to perform excavation work using only the bucket main body, only the holding frame can be easily removed without removing the bucket main body. Further, even when excavation work is performed with the presser frame attached, the presence of the presser frame does not impede the excavation work and does not impair work efficiency.

(E) Embodiment of the invention FIG. 3 is a side view showing the bucket tote device with a presser frame according to the present invention, and is different from the conventional bucket tote device with a presser frame shown in FIG. The only difference is that the pivot shaft between the bucket main body 3 and the arm 1 is arranged to be shifted away from the bucket main body opening surface 13 from the pivot shaft between the bucket main body 3 and the arm 1. That is, the pivot pin 11 between the bucket main body 3 and the arm 1, and the pivot pin 11 between the bucket main body 3 and the presser frame 14.
The pivot pins 12 between the two are arranged independently from each other. This allows the presser frame 14 to be moved to the bucket main body 3.
When removing it from the bucket, it can be removed independently and easily without affecting the attachment between the bucket main body 3 and the arm 1.

In addition, as mentioned above, the presser frame 14 and the bucket main body 3
The pivot shaft 12 between the bucket main body 3 and the arm 1
By shifting the pivot shaft 11 between the presser frame and the presser frame, the swinging movement of the presser frame can be changed. The swinging motion of the presser frame varies depending on the offset position of the pivot shaft between the presser frame and the bucket main body from the pivot shaft between the bucket main body and the arm, and the design of the link mechanism that rotates the presser frame. It will be a vine, but
As an example of the effects of the present invention, FIG. 4 shows the rocking motion of the bucket main body and the presser frame in the bucket cart apparatus with presser frame shown in FIG. In the present invention, the pivot pin 12 between the bucket main body 3 and the presser frame 14 connects the pivot pin 11 between the bucket main body 3 and the arm 1 and the pivot pin 20 between the lower link 9 and the presser frame 14. Regarding the straight line, in the standby state shown in FIG. 3 (corresponding to the position D' of the bucket main body 3 and the position d' of the presser frame 14 in FIG. )It is in. However, during excavation work, the pivot pin 12 rotates clockwise around the pivot pin 11 integrally with the bucket main body 3 and crosses the connecting straight line (at this time, the bucket main body 3 and the holding frame 14 are 4) to the side opposite to the side where arm 1 exists with respect to the connecting line (hereinafter referred to as below the connecting line). Further, in the general excavation angle range of the bucket main body 3 (ie, the range A' to B' in FIG. 4), the presser frame 14 hardly swings (ie, the range a' to b' in FIG. 4). In other words,
2 and 4, other conditions being the same, show changes in the swinging motion of the presser frame due to a difference only in the position of the pivot shaft between the presser frame and the bucket main body. As mentioned above, in the conventional bucket tote apparatus with a presser frame shown in FIG. 2, the bucket main body 3 and the presser frame 8 swing from the mutually open state to the direction in which they are mutually closed due to the extension of the cylinder rod 6 of the tilt cylinder 2. While the bucket main body 3 swings at a generally constant angular velocity, the presser frame 8 tends to have a small angular velocity in the first half and a large angular velocity in the second half. In addition, in FIG. 2, in the general excavation angle range of the bucket main body 3 (the range roughly shown in A to B), the presser frame 8 swings in the range shown in a to b and opens at a certain angle with respect to the opening surface 13 of the bucket main body. position, and the swinging angle between them tends to be smaller than the swinging angle of the bucket main body. In the bucket tote device with a presser frame according to the present invention, the above-mentioned tendency can be made even more remarkable as shown in FIG. Figures 3 and 4
As can be seen from the figure, while the pivot pin 12 is above the connection line, the swinging angle of the bucket main body 3 is relatively small (range D' to C' in Fig. 4), but on the contrary, the swinging angle of the presser frame 14 is relatively small (range D' to C' in Fig. 4). The angle of movement is relatively large (range d′~
c'), while the pivot pin 12 is below the connection straight line, the swing angle of the bucket main body is relatively large (range C' to A' in the figure), but conversely, the swing angle of the presser frame 14 is becomes smaller (range c' to a' in the figure). These operations are realized by utilizing the special arrangement of the pivot pins 12, 11, 20 and the unique functions of the link mechanism. In the general digging angle range of the bucket main body 3 (approximately the range shown in A' to B'), the presser frame 14
As shown in a' to b', the opening surface 13 of the bucket main body is in a position that is wider than that shown in FIG. 2, and the swing angle between them (a'→b') is It is even smaller than the swing angle (a→b) in the figure. Therefore, in the general excavation angle range of the bucket main body, the holding frame 14 remains wide open with respect to the opening surface 13 of the bucket main body and is almost at a standstill, so the existence of the holding frame becomes an obstacle to excavation work by the bucket main body. Never. In addition, the swing angle of the bucket main body 3 is larger (see Fig. 4).
Even in the range between B' and C'), the opening angle of the holding frame 14 with respect to the opening surface 13 of the bucket main body can be made larger than in conventional bucket cart devices with a holding frame, so the presence of the holding frame poses an obstacle to excavation work. The extent to which this happens becomes smaller. Therefore, even when performing excavation work with the presser frame still attached, the bucket apparatus with a presser frame according to the present invention can achieve improved work efficiency compared to conventional apparatuses.

(f) Effects of the invention Accordingly, the above structure of the invention has the following advantages.

The first part between the presser frame 14 and the bucket main body 3
Regarding the straight line in which the pivot shaft 12 connects the second pivot shaft 11 between the bucket main body 3 and the tip of the arm 1, and the third pivot shaft 20 between the lower link 9 and the presser frame 14, When the cylinder rod 6 is extended, it is located approximately on the side where the arm 1 exists (that is, above), but when the cylinder rod is extended or contracted, the first pivot shaft 12 moves around the second pivot shaft 11 toward the bucket main body. The arm is configured to rotate integrally with the arm and move substantially toward the opposite side (ie, downward) from the side where the arm exists with respect to the connecting straight line.

Therefore, when excavating with the presser frame attached, at least in the general excavation angle range of the bucket main body, the first pivot shaft 12 is located below the connecting straight line, so the unique function of the link prevents the The holding frame is automatically moved to a position that is wide open with respect to the opening surface of the bucket, and the swing rate is made smaller near that position (i.e., it is almost stopped), so that the holding frame is used for excavating the bucket main body. I try not to get in the way of this. Therefore, the efficiency of bucket excavation work is improved, and since there is no need to remove the presser frame from the arm, the work efficiency can be further improved.

Furthermore, at the end of the excavation work using the bucket main body, the holding frame is located on the opening surface of the bucket, so
It can perform functions such as preventing cargo from spilling, and can further improve work efficiency.

Furthermore, the movement of the presser frame is achieved by a link mechanism and does not require any hydraulic actuating mechanism, which simplifies the configuration and reduces costs, and eliminates the trouble of maintenance and inspection. obtain.

Furthermore, if you want to perform excavation work using only the bucket body and remove the presser frame, you can easily remove only the presser frame from the bucket body without the extra work of once removing the bucket body from the arm. This simplifies the removal work.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of a conventional bucket tote device with a presser frame, Fig. 2 is a diagram showing the rocking movement of the bucket main body and the presser frame of the bucket tot device with a presser frame shown in Fig. 1, and Fig. 3 is a side view showing an example of a conventional bucket tot device with a presser frame. FIG. 4 is a side view showing the invented bucket tote device with a presser frame, and FIG. 4 is a diagram showing the rocking motion of the bucket tote body and the presser frame of the bucket tot device with a presser frame of FIG. 3; 1... Arm, 2... Tilt cylinder, 3...
Bucket main body, 5... Upper link, 6... Cylinder rod of tilt cylinder, 7... Sub link,
8, 14...presser frame, 9...lower link, 11...
...Pivot pin between the bucket body and the arm tip,
12... Pivot pin between the presser frame and the bucket body.

Claims (1)

[Claims for Utility Model Registration] One end of the arm 1 of a civil engineering excavator is pivotably mounted 11 to the tip of the arm 1, and a portion near the one end is connected to the tip of the cylinder rod 6 of the tilt cylinder 2 via an upper link 5. A holding frame 14 having one end pivotably mounted on the bucket main body 12 and the other end capable of opening and closing with respect to the opening surface 13 of the bucket main body, and one end mounted on the arm. a sub-link 7 which is pivotally connected and whose other end is pivotally connected to the upper link 5; one end which is pivotally connected 20 to a position a predetermined distance from the pivot point 12 on the bucket main body of the presser frame 14; The bucket body 3 is excavated by the movement of each of the links 5, 7, and 9 caused by the expansion and contraction of the cylinder rod 6 of the tilt cylinder. In a bucket cart device with a presser frame in which a clamping action is performed by the bucket cart main body and the presser frame during operation, the first
The pivot shaft 12 is a straight line connecting the second pivot shaft 11 between the bucket main body 3 and the tip of the arm 1, and the third pivot shaft 20 between the lower link 9 and the presser frame 14. When the cylinder rod 6 is extended, it is located approximately on the side where the arm 1 is present, but when the cylinder rod is extended or contracted, it is located on the side where the first pivot shaft 12 is located.
rotates integrally with the bucket main body around the second pivot shaft 11 and moves toward the side substantially opposite to the side where the arm exists with respect to the connecting line, thereby connecting the first and second pivots. Compared to the case where the shafts 11 and 12 are coaxial, at least in the general excavation angle range of the bucket main body, the presser frame moves to a position that is more open to the bucket opening surface, and near that position, the presser frame A bucket storage device with a presser frame, characterized in that the buckets are arranged at predetermined positions offset from each other so that the rate of swing is smaller.