JPH033647Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to an attachment detachment device for an industrial vehicle that allows attachments such as buckets to be easily attached and detached.

Conventional technology Conventionally, this type of attachment/detachment device was
The one described in Japanese Utility Model Application Publication No. 58-120264 is known. In the above-mentioned known method, when the bucket cart attached to the tip of the boom is removed, the bucket cart is dumped by pulling a knob provided near the seat and with the hook engaged with the stopper.

Problems that the invention aims to solve However, with the above-mentioned conventional device, it is difficult to confirm that the lock has been released, so the bucket may be dumped even after the lock has been released, and as a result, the bucket is ejected forward. There was a problem with the product, which posed a danger.

This invention was made for the purpose of improving the above-mentioned problems.

Means and action for solving the problem: A cam is provided on the boom side of the work equipment and is rotated toggle by a driving means as appropriate, and at least two cam surfaces provided on the cam are provided on the main body side when the attachment is tilted. The first lever is made to selectively abut on the pin of the first lever, so that the first lever can freely rotate in forward and reverse directions, and the rotation of the first lever connects the main body and the attachment via a link mechanism whose legs are opened in a V-shape. This attachment/detachment device for an industrial vehicle is capable of attaching/detaching an attachment only by tilting the attachment by transmitting a signal to a lock pin 20 and moving the lock pin 20 forward or backward.

Embodiment One embodiment of this invention will be described in detail with reference to the drawings. In the figure, 1 is a boom of a working machine mounted on an industrial vehicle. An attachment 3 is detachably attached. The main body 2 has a total of six plates 2a, one pair each located at the left, right and center parts.
and a horizontal rod 2b that laterally connects the upper and lower ends of these plate bodies 2a, and a bracket 4 protruding from an attachment 3 is inserted between the plate bodies 2a located on both sides. It is becoming more and more common. The bracket 4 has a hook 4a on the upper side that is engaged with the upper horizontal rod 2b of the main body 2.
Further, in the lower part, there is a contact part 4b that comes into contact with the lower horizontal rod 2b, and a pin hole 4 is located at a position that matches the pin hole 2c drilled in the plate body 2a just above the contact part 4b.
c is provided.

On the other hand, a rotating shaft 5 is supported horizontally between the plates 2a located at the center of the main body 2. The rotating shaft 5 is biased clockwise by a tension spring 7 stretched between a lever 6 protruding from one end and a horizontal rod 2b. The bent portion of the first lever 8 and the lower end of the second lever 9 are fixed. Pins 8a and 8b are laterally protruded from the upper and lower ends of the first lever 8, and when the attachment 3 is tilted, the pins 8a and 8b are selectively applied to the cam surface 10a or 10b of the cam 10 provided on the boom 1 side. It's starting to come into contact with me.

The lower end of the cam 10 is pivotally connected to a bushable cable 11, and the bushable cable 11 connects the cam surface 10a,
The 10b side is rotated in the vertical direction. Also cam 10
A toggle spring 14 is stretched between the boom 1 and the toggle spring 14, and the toggle spring 14 makes a toggle motion as the cam 10 rotates. The surface 10a is connected to the pin 8a, and the cam surface 1 is connected to the pin 8a when released.
A knob 15 provided on the other end side of the bushable cable 11 so that the knob 0b is in contact with the pin 8b.
The cam 10 is rotated.

On the other hand, the upper end of the second lever 9 is fitted with an intermediate portion of a shaft 16 inserted into an arc-shaped long hole 2d drilled in the plate 2a, and both ends of the shaft 16 are fitted. is a pair of long links 17 that open in an almost V-shape.
The upper end of is pivoted. The other end of a short link 19, one end of which is pivotally connected to both ends of a rotating shaft 18 supported below the rotating shaft 5, is pivotally connected to the intermediate portion of each long link 17, and the lower end of the long link 17 is One end side of a lock pin 20, which is provided in the pin holes 2c and 4c and can be freely inserted and removed from the lateral direction, is pivotally attached.

Note that 21 indicates a tilt stopper that comes into contact with the boom 1 when the attachment 3 is tilted to regulate the tilt limit.

Next, the operation will be described. When attaching the attachment 3 to the boom 1, the hook 4a is engaged with the horizontal rod 2b on the upper part of the main body 2, and the attachment is tilted by a tilt cylinder (not shown). At this time, the cam 10 is upright, and the attachment 3
As the first lever 8 tilts, the upper pin 8a of the first lever 8 comes into contact with the cam surface 10a, and the first lever 8 is rotated counterclockwise by the cam surface 10a.
The shaft rod 16 is pushed down along the elongated hole 2d via the second lever 9. As a result, the lower end side of the long link 17 is opened, so that each lock pin 20 is pushed in the left and right direction, and the tip end is inserted into the pin hole 4c of the bracket 4.
The main body 2 and the attachment 3 are connected to each other.

Next, to release the lock, pull the knob 15 provided at one end of the bushable cable 11 to rotate the cam 10 to the position shown in FIG. If you tilt attachment 3 in this state, the first
The pin 8b provided on the lower side of the lever 8 is connected to the cam surface 10.
b, and the first lever 8 rotates in the clockwise direction opposite to when it is locked. This causes the second lever 9
Since the shaft rod 16 is raised inside the elongated hole 2d through the elongated hole 2d, the lower end side of the elongated link 17 is closed, each lock pin 20 is pulled out from the pin hole 4c of the bracket 4, and the lock is released.

Effects of the device As detailed above, this device is designed to unlock the attachment by tilting it in the same way as when locking, so that even if the attachment separates from the main body, it will not be ejected forward. The attachment can be unlocked safely. Further, if a tilt stopper is provided, it becomes easy to confirm that the lock has been released.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, with FIG. 1 being a side view, FIG. 2 being a front view of this device, and FIG. 3 being an explanatory view of the operation when the lock is released. 1 is the boom, 2 is the main body, 3 is the attachment,
4a is the hook, 4c is the pin hole, 8 is the first link,
8a and 8b are pins, 10 is a cam, 10a and 1b are cam surfaces, 16 is a shaft rod, 17 is a long link, and 20 is a lock pin.

Claims (1)

[Scope of utility model registration request] A main body 2 is rotatably attached to the tip of a boom 1 of a working machine a, and a horizontal rod 2b engaged with a hook 4a provided on the attachment 3 side is attached to the upper part of the main body 2.
In addition, a lock pin 20 is provided at the lower part, which can be inserted into and removed from the pin hole 4c on the side of the attachment 3, and the lock pin 20 is opened in a substantially V-shape, and the shaft rod 16 connected to the upper end is moved up and down. The lower end of the long link 17, which opens and closes in the approaching and separating direction, is connected to the lower end of the long link 17, and the first link 8 is connected to the shaft rod 16.
The pins 8a and 8b protruding from the first link 8 are connected to at least two cam surfaces 10
The cam surfaces 10a, 10 of the cam 10 have cam surfaces 10a, 10b and are toggled and rotated by an appropriate operating means.
(b) An attachment/detachment device for an industrial vehicle which selectively comes into contact with the attachment 3 when the attachment 3 is tilted.