JPS6015796Y2 - Bucket steadying device for Kramsiel Bucket - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for stabilizing a clamshell packet in which the excavation packet is pivotally supported on an arm via a hanger so as to be swingable in a direction perpendicular to the opening and closing direction of the excavation packet.

Conventionally, clamshell packets have been equipped with brake discs to prevent excessive vibration, but the packet is pivotally supported by a connecting pin between the arm and the hanger, and vibration of the packet around the connecting pin is free. This avoids problems such as when excavating hard soil, the packet rotates due to reaction force and escapes, making it difficult to dig properly, and when excavating a narrow hole, the packet swings, making it difficult to position the excavation position accurately. There wasn't.

This invention was made to solve the above-mentioned conventional problems. Before starting excavation (while the packet is open), the arm and hanger (packet) are locked to prevent the packet from swinging, and positioning and excavation are performed. Packets in clamshell packets that are reliable and easy to use, and that the arm and packet (hanger) can be unlocked after excavation is completed (when the packet is closed and dumped), allowing dumping operations to be carried out without any hindrance. The purpose of this invention is to provide a steady restraint device.

The feature of this invention is that the hanger pivotally supported on the arm is provided with a pin that is orthogonal to the pivot pin of the hanger, a pair of lock levers are pivotally attached to the pin, and an elastic material such as a spring is installed between the lock levers, so that the arm is always attached to the hanger. At the same time, the packet and the lock lever are connected by a connecting device such as a chain, and the engagement between the arm and the lock lever is released in conjunction with the packet closing operation. There is a particular thing.

Hereinafter, the present invention will be explained with reference to illustrative embodiments.

A hanger 2 is pivotally supported on the arm 1 by a connecting pin 3 attached to the arm 1, and a packet 4 is pivotally supported on the hanger 2 by a pin 5 so as to be openable and closable in a direction perpendicular to the swinging direction of the hanger. There is.

This packet 4 has one end attached to packet 4 and the other end attached to hanger 2.
They are opened and closed by packet opening/closing cylinders 6 which are respectively pivotally supported.

A pair of lock levers 8 are pivotally supported on the pin 7 which pivotally supports the packet opening/closing cylinder 6 on the hanger 2 side, so that the lock levers 8 can be opened and closed in a direction perpendicular to the swinging direction of the hanger, with the arm 1 in between.

This lock lever 8 is provided with a locking protrusion 9 on the inside of the upper end (on the arm 1 side), and a lock return spring 10 is stretched between the lock levers 8, so that a closing force is always applied in the arm direction. There is.

Further, the lock lever 8 is connected to the packet 4 by a connecting member such as a chain 11 or a spring.

A locking recess 12 is formed in the arm 1 at a position that can be engaged with a locking protrusion 9 of a lock lever 8.

The shape of the locking protrusion 9 and the locking recess 12 is such that the lock lever 8 is prevented from rotating in the hanger swinging direction in the engaged state, for example, a square shape.

When the packet is closed, the chain 11 is linked to the extension of the opening/closing cylinder 6, overcomes the biasing force of the lock return spring 10, rotates the lock lever 8, and moves the locking protrusion 9 into the arm 1.
The length or strength is adjusted so that the lock return spring 10 is engaged by the biasing force of the lock return spring 10 when the packet is opened.

In the above configuration, when excavation is started (packet open state), the left and right lock levers 8 are pressed against the arm 1 side by the elastic force of the lock return spring 10, and the locking protrusion 9 is engaged and held in the locking recess 12. Therefore, the lock lever 8 prevents the hanger 2 (packet 4) from swinging around the arm-hanger connection pin 3, and the packet 4 cannot swing relative to the arm 1.
The packet 4 can be positioned reliably and easily, and even if the packet 4 is strongly pressed against hard soil, it will not rotate and escape, so powerful excavation can be performed easily.

In addition, in the state at the end of excavation (packet closed state), the lock lever 8 is rotated outward around the pin 7 by the chain 11 etc. due to the extension (closing operation) of the packet opening/closing cylinder 6, and the locking protrusion of the lock lever 8 is rotated outward. 9 is removed from the locking recess 12 of the arm 1, and the hanger 2 is attached to the arm 1.
Since the hanger is only pivotally supported via the connecting pin 3 and can swing around the connecting pin 3, dumping operations etc. can be performed without any trouble.

In addition, the lock lever 8 returns to clamp the tip of the arm 1 from both sides by the elastic force of the lock return spring 10 due to the opening operation of the packet 4, and the locking protrusion 9 of the lock lever 8 fits into the locking recess of the arm 1. 12, the packet 4 will be locked to the arm 1 again.

As described above, the present invention uses an elastic material such as a lock return spring to bias the lock lever in the locking direction in order to lock the arm and the hanger, and when the packet is closed, the lock can be released by overcoming the elastic force. Since the positioning of the packet before the start of excavation and the powerful excavation can be performed reliably and easily, and the dumping operation after excavation can be carried out as usual, the efficiency of the excavation operation can be improved.

Furthermore, the configuration is simple and can be easily applied to existing clamshell packets.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention in a packet open state;
FIG. 3 is a partially sectional front view showing the packet in a closed state. 1...Arm, 2...Hanger, 3.
...Arm hanger series connection pin, 4...
Packet, 5, 1...Pin, 6...Packet opening/closing cylinder, 8...Lock lever-19
...Latching protrusion, 10...Lock return spring, 11...Chain, 12...
...Latching recess.

Claims (1)

[Scope of utility model registration request] In a clamshell packet in which a hanger is swingably supported on an arm, and the packet is attached to the hanger so that it can be opened and closed by an opening/closing device, the hanger is pivotally attached to a connecting pin attached to the arm, and A pin is provided perpendicular to the connecting pin, and a locking portion is provided on the pin for pivoting a pair of lock levers that are constantly biased in the arm direction by an elastic material, and for mutually engaging the lock levers and the arm. Furthermore, the lock lever and the packet are connected with a connecting device such as a chain, and the lock lever is moved in conjunction with the packet closing operation.
A device for stabilizing a packet in a clamshell packet, characterized in that the latching between the holder and the arm is released.