JPH0330439Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is an automatic bucket reversing system used when excavated soil or other objects to be transported generated during caisson sinking work and other civil engineering works are transported in buckets. It is related to the device.

[Prior art]

Conventionally, in the construction of pneumatic caissons, when excavated soil stored in the bucket is discharged from the bucket, first, as shown in Fig. 11,
After the bucket 9 containing the excavated soil is lifted above the air lock device 11 in the neutral caisson by the crane 10, a worker on the scaffold 12 around the air lock device 11 lifts the bucket with the wire rope 13 for reversing the bucket. A hook 15 connected to the end via a link chain 14 is engaged with a locking fitting 16 at the bottom of the bucket 8, and then, as shown in FIG. After conveying to the upper part of the hopper 17, the strip for reversing the bucket consisting of the wire rope 13 and the link chain 14 is held in tension, and then the crane 1
By loosening the hanging rope 18, the bucket 9 is rotated in the direction of arrow A, and as shown in FIG. is supplied to.

However, when discharging excavated soil as described above, the worker grasps the hook 15 connected to the bucket reversing operation strip with his/her hand and engages it with the locking metal fitting 16 at the bottom of the bucket 9. The problem is that the bucket cannot be automatically turned over, which is dangerous because it is performed at a high place and on narrow scaffolding.

[Purpose of the invention, structure]

The purpose of this invention is to provide an automatic bucket reversing device that can advantageously solve the above-mentioned problems. Holding members 2 are fitted into the support column 1 so as to be able to rise and fall freely, and on both sides of a bucket receiving box 3 arranged between each holding member 2,
A reversing chain 5 has a horizontal support shaft 4 arranged on a horizontal straight line fixed, the support shaft 4 is rotatably fitted into the holding member 2, and one end is connected to the upper part of the guide column 1. is wound around a reversing sprocket 6 fixed to the support shaft 4 and a guide sprocket 7 provided above the guide column 1,
The automatic bucket reversing device is characterized in that a lifting counterweight 8 is connected to the other end of the reversing chain 5, and a bucket locking device is provided on the bucket receiving box 3.

〔Example〕

Next, this invention will be explained in detail using illustrated examples.

Figures 1 to 4 show an embodiment of this invention, in which a pair of vertical guide columns 1 are arranged at intervals in the lateral direction (left and right direction), and the lower ends of the support frames are horizontal. The supporting frame member 19 is fixed to the upper part of the frame 20 in the excavated soil storage hopper 17, and the upper and lower parts of the holding member 2, which is fitted into each guide post 1 so as to be able to rise and fall freely, are provided with guide posts. A pair of guide rollers 21 facing each other with the bucket 1 in between are installed, and a basket-shaped bucket receiving box 3 having an expansion guide section for guiding the bucket and inserting the bucket at the upper part is arranged between the left and right holding members 2. One end of a horizontal support shaft 4 arranged on a horizontal straight line extending in the left-right direction is fixed to the left and right sides of the receiving box 3, and the intermediate portion of the support shaft 4 is rotatably attached to the holding member 2. A reversing sprocket 6 of the same diameter is fitted and inserted through a vertical slit 22 provided in the guide column 1, and at the other end of each support shaft 4.
is fixed.

A support fitting 23 disposed above the rear part of the reversing sprocket 6 is fixed to the upper part of the guide column 1, and an adjustment connecting bolt 24 inserted through the support fitting 23 has an adjustment nut attached to the upper part of the support fitting 23. 26 is screwed together, and a fixing nut 26 is screwed into the lower part of the support fitting 23, and one end of the reversing chain 5 is connected to the lower end of the bolt 24, and the middle part of the reversing chain 5 is connected to the lower end of the bolt 24. , is sequentially wound around the lower part of the reversing sprocket 6, the guide sprocket 7 attached to the upper end of the guide column 1, and the guide sprocket 27 attached to the rear end of the support frame 19, and further A lifting counterweight 8 is connected to the other end of the reversing chain 5.

The lower part of the locking arm 29 is pivotally attached to the support member 28 fixed to the front part of the bucket receiving box 3 by a horizontal shaft 30 extending in the left-right direction, and the upper part of the locking arm 29 projects rearward. Bucket locking part 3
1 is integrally provided, and furthermore, a proximal end portion of a refracting arm 32 that projects forward and then protrudes downward is integrally provided at the lower part of the locking arm 29, and a counterweight 33 is provided at the tip of the refractive arm 32. The locking arm 29 having the bucket locking portion 31 and the bending arm 32 to which the counterweight 33 is fixed constitute a bucket locking device for preventing the bucket from falling off.

In order to improve the safety of preventing the bucket from falling off, bucket locking devices for preventing the bucket from falling may be provided at a plurality of locations around the bucket receiving box 3.

An upper limit stopper 34 for setting the upper limit position of the holding member 2 is fixed to the guide column 1 and is fixed to the upper limit position of the holding member 2.
A lower limit stopper 35 for setting the lower limit position is fixed to the guide column 1 or the support frame 19, or both, and the upper end of the guide column 1 and the front end of the support frame 19 are connected via a brace 36. ing.

When the bucket 9 is not stored in the bucket receiving box 3, the holding member 2 and the bucket receiving box 3 are moved upward by the weight of the lifting counterweight 8, and the excavated soil is not stored in the bucket receiving box 3. When the bucket 9 or the empty bucket 9 is stored and placed, the lifting counterweight 8 is moved so that the holding member 2 and the bucket receiving box 3 move downward against the weight of the lifting counterweight 8. weight is set.

When the holding member 2 is at the upper limit position where it abuts against the upper limit stopper 34, the bucket receiving box 3 maintains the vertical state in which it opens upward, and the weight of the counterweight 33 causes the locking arm 29 and the bucket locking portion 31 to move. It is held in the front position, that is, the position that allows entry and exit of the bucket.

When inverting the bucket 9 containing excavated soil using the apparatus of the above embodiment, as shown in FIG.
A bucket 9 containing excavated soil is lifted and transported by a crane via a hanging rope 18 and placed above the bucket 3, and then the bucket 9 is lowered and placed in the bucket receiving box 3.

In this way, the weight of the bucket 9 and the excavated soil therein causes the lifting counterweight 8 to
The bucket receiving box 3 and the holding member 2 holding the support shaft 4 fixed to the bucket receiving box 3 move downward against the weight of the bucket receiving box 3. As the holding member 2 moves downward, the reversing sprocket 6 fixed to the spindle 4 and meshing with the reversing chain 5 is rotated, so that the bucket receiving box 3 containing the bucket 9 is moved to the position shown in FIG. Then, as the bucket is rotated in the direction of arrow B in FIG. 9, the locking arm 29 and the bucket locking portion 31 are rotated toward the inside of the bucket receiving box 3 due to the weight of the counterweight 33, as shown in FIG. It will be done.

As shown in FIGS. 6 and 9, when the bucket receiving box 3 is rotated approximately 90 degrees and overturned, the bucket locking portion 31 is already facing the front of the opening edge of the bucket 9. When the bucket receiving box 3 rotates further, the opening edge of the bucket 9 engages with the bucket locking part 31 as shown in FIG. 7, so the bucket 9 does not fall downward from the bucket receiving box 3. . As the bucket receiving box 3 is rotated in the reverse direction, the excavated soil in the bucket 9 is discharged and thrown into the excavated soil storage hopper 17. As shown in FIG. 10, when the holding member 2 descends until it hits the lower limit stopper 35, the bucket receiving box 3 and the bucket 9 therein are rotated 180 degrees and turned upside down, and the excavated soil in the bucket 9 is Ejection ends.

After the excavated soil in bucket 9 has been discharged,
An empty bucket 9 is lifted up by a crane via a lifting rope 18. In this way, the bucket receiving box 3 and the holding member 2 are moved upward by the weight of the lifting counterweight 8, and the bucket is moved upward by the reversing chain 5 via the reversing sprocket 6 and the support shaft 4. The receiving box 3 and the bucket 9 therein are rotated in the direction of arrow C.

As the bucket receiving box 3 is further rotated in the direction of arrow C from the overturned position, the bucket retaining portion 3 is moved by the weight of the counterweight 33, as shown in FIG.
1 moves away from the opening edge of the bucket 9 forward, and when the holding member 2 hits the upper limit stopper 34 and stops, the bucket receiving box 3 becomes vertically opened upward, and then the empty bucket 9 is carried out by lifting from the bucket receiving box 3.

When implementing this invention, when the bucket tray receiving box 3 rotates in the reverse direction from the overturned position, the bucket tray 9
As the bucket locking device for preventing the bucket from falling off from the bucket receiving box 3, any structure other than that shown in the drawings may be adopted.

[Effect of idea]

According to this invention, when the bucket 9 containing material to be transported such as excavated soil is lowered into the bucket receiving box 3, the weight of the bucket 9 and the material to be transported pushes against the weight of the lifting counterweight 8. When the box 3 and the holding member 2 holding the support shaft 4 fixed to the bucket receiving box 3 are moved downward, and the holding member 2 is moved downward, the reversing chain is fixed to the support shaft 4. Since the reversing sprocket 6 that is engaged with the reversing sprocket 5 is rotated, simply by lowering the bucket 9 containing the objects to be transported into the bucket receiving box 3, the bucket 9 is automatically moved by a simple reversing mechanism. The object to be transported in the bucket 9 can be discharged by reversing the bucket, and since the bucket receiving box 3 is provided with a bucket locking device, the bucket 9 can be prevented from slipping out from the bucket receiving box 3 when reversing. When the empty bucket 9 is simply lifted after the objects to be transported have been discharged from the bucket 9, due to the weight of the lifting counterweight 8,
While automatically moving the bucket receiving box 3 and the holding member 2 upward, the bucket receiving box 3 and the bucket 9 therein are rotated by the reversing chain 5 via the reversing sprocket 6 and the support shaft 4. , it is possible to automatically return to the original upward opening state.

[Brief explanation of the drawing]

FIGS. 1 to 4 show an automatic bucket reversing device according to an embodiment of this invention.
The figure is a partially cutaway side view, the second figure is a front view, and the third figure is a partially cutaway side view.
The figure is a side view showing the relationship between the holding member supporting the reversing sprocket, the guide column, and the reversing chain, and FIG. 4 is a partially longitudinal side view showing the relationship between the bucket belt locking device and the bucket belt. Figures 5 to 7 are partial longitudinal side views showing the relationship between the bucket locking device and the bucket when the bucket receiving box containing the bucket is rotated in the reversing direction, and Figure 8 is a partial longitudinal side view of the bucket receiving box. Figure 9 is a side view showing the bucket tray with the bucket placed above it, Figure 9 is a side view showing the bucket tray receiving box that has been rotated to the overturned position, and Figure 10 is a side view showing the bucket tray with the bucket tray placed above it. FIG. 3 is a side view showing an inverted state. 11 to 13 show the conventional bucket cart reversing system, and FIG. 11 is a side view showing the state when the bucket cart reversing operation strip is locked to the bottom of the bucket cart being lifted; FIG. 12 is a side view showing the state when the bucket tot starts reversing operation, and FIG. 13 is a side view showing the state when the bucket tot is reversed. In the figure, 1 is a guide column, 2 is a holding member,
3 is a bucket receiving box, 4 is a spindle, 5 is a reversing chain, 6 is a reversing sprocket, 7 is a guide sprocket, 8 is a counterweight for lifting, 9 is a bucket, 17 is a hopper for storing excavated soil, 18 is a hanging rope, 19 is a support frame material, 21 is a guide roller, 2
2 is a vertical slit, 23 is a support fitting, 24 is an adjustment connection bolt, 27 is a guide sprocket, 28
29 is a support member, 29 is a locking arm, 31 is a bucket locking portion, 33 is a counterweight, 34 is an upper limit stopper, and 35 is a lower limit stopper.

Claims (1)

[Scope of utility model registration request] Holding members 2 are fitted into a pair of guide columns 1 arranged at intervals in the lateral direction so as to be able to rise and fall freely, and are arranged in a horizontal straight line on both sides of a bucket receiving box 3 arranged between each holding member 2. A horizontal support shaft 4 is fixed, the support shaft 4 is rotatably fitted into the holding member 2, and a reversing chain 5 whose one end is connected to the upper part of the guide column 1 is attached to the support shaft 4. It is wound around a fixed reversing sprocket 6 and a guide sprocket 7 provided above the guide column 1, and a lifting counterweight 8 is connected to the other end of the reversing chain 5, and the reversing chain 5 is connected to a lifting counterweight 8. 3
An automatic bucket reversing device characterized in that a bucket locking device is provided on the bucket.