JPH0615983Y2 - Forklift hinged device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a hinged device which is one of attachments of a forklift, and more particularly to a swinging mechanism of its finger bar.

[Prior Art] FIG. 4 is a general perspective view of a general forklift with a hinged device, and FIG. 5 is a side view of the hinged device.

The swinging mechanism of the finger bar in the conventionally known hinged device is as shown in FIG. 5, and includes a carriage 1 having a function of a lift bracket that moves up and down in the inner mast, and a support projecting below the carriage 1. The arm 2 includes a finger bar 4 pivotally attached to the arm 2 via a pin 3 and a dump cylinder 5 for giving a swinging force to the finger bar 4.

The finger bar 4 supports the fork F via the upper and lower main members 6 and 7, and expands and contracts the dump cylinder 5 to swing the finger bar 4 to rotate the fork F upward by α ° and downward by β °. It can be moved.

[Problems to be Solved by the Invention] In such a vehicle with a hinged device, in order to increase the maximum load that can be mounted on the fork F, the thickness of the entire hinged device (load center loss amount) is reduced. It is necessary to shorten the distance l between the center of the front wheel (load wheel) of the vehicle and the front surface of the fork.

However, in order to reduce the load center loss amount, if a limit design that minimizes the clearance of each part is attempted, the upper and lower main members 6 and 7 are placed on the upper surface or the lower surface of the support arm 2 when the finger bar 4 swings. Not only do they come into contact with each other to generate shock and vibration, but also cause noise due to impact sound (tapping sound). Therefore, it is necessary to ensure a gap between the upper and lower main members 6 and 7 and the support arm 2 so that the upper and lower main members 6 and 7 do not contact each other even when the finger bar 4 is maximally swung, and there is a limit to the compression of the load center loss amount. Was said.

As described above, there is a problem that impact and noise are generated when the load center loss amount is reduced, and the load center loss amount has to be sacrificed when the impact and noise are prevented.

The present invention aims to solve the above problems and enable a limit design, and an object thereof is to prevent impact and noise at the time of dumping of a hinged device and to minimize load center loss. It is what

[Means for Solving the Problem] The present invention provides a means for solving the above-mentioned problems, in which a support arm 2 projecting from a lower portion of a carriage 1 that can move up and down in an inner mast is provided. A finger bar 4 pivotally mounted via a pin 3 is made swingable by a dump cylinder 5, and a fork F is supported via upper and lower main members 6 and 7 provided laterally on the finger bar 4. At the same time, a hinged device for a forklift is devised, in which a shock absorbing vibration isolator 9 for supporting the back surfaces of the main members 6 and 7 of the finger bar 4 is arranged at the base end of the support arm 2. It is a summary.

[Embodiment] The construction of the present invention will be described with reference to an embodiment shown in the drawings.

The same reference numerals as those in FIG.

Reference numeral 1 denotes a carriage having a function of a lift bracket that moves up and down in the inner mast, and a finger bar 4 is pivotally attached via a pin 3 to a support arm 2 protruding from the lower portion thereof.

Reference numeral 5 denotes a dump cylinder that gives a swinging force to the finger bar. When the cylinder 5 is extended, the finger bar 4 swings clockwise about the pin 3 as an axis, and conversely when the cylinder 5 is contracted, the finger bar 4 rotates counterclockwise. Rock.

The finger bar 4 supports the fork F via the upper and lower main members 6 and 7, and expands and contracts the dump cylinder 5 to swing the finger bar 4 to rotate the fork F upward by α ° and downward by β °. It can be moved.

The above is known in the art.

Reference numeral 8 denotes a bracket attached to both left and right sides of the base end portion of the support arm 2, and a shock absorbing vibration isolator 9 is detachably attached to the bracket 8 with bolts, nuts and the like.

The anti-vibration material 9 is attached obliquely downward (FIG. 1) or / and obliquely upward (FIG. 2) so as to support the back surface of the main members 6, 7 of the finger bar 4, and the inclination angle thereof is the finger bar. 4 is substantially the same as the maximum downward angle β ° or the maximum upward angle α °.

The vibration-proof material 9 can be made of any elastic material such as rubber or synthetic resin.

[Operation] Since the present invention has the above-described configuration, as shown in FIG. 3, when the finger bar 4 swings downward, the rear surface of the main member 7 at the point A before reaching the maximum inclination angle β °. The shock absorbing anti-vibration material 9 comes into contact with the anti-vibration material 9 until the end point B of the rocking, and the back surface of the main member 7 absorbs the impact at the maximum inclination angle β °. It can be supported by the vibration isolator 9.

Therefore, the gap between the pin 3 and the finger bar 4, the gap between the finger bar 4 and the support arm 2 and the like are pressed by the restoring force of the vibration isolator 9, and the relative movement between these parts is suppressed. It is possible to reduce the impact noise while reducing the impact.

Although the above description has been made on the state where the finger bar 4 is swung downward, the finger bar 4 is swung upward by attaching the vibration isolator 9 obliquely upward as shown in FIG. It goes without saying that the impact noise can be alleviated in the same way when the impact is applied.

[Effects] According to the present invention, the load absorbing loss is reduced by disposing the shock absorbing vibration isolator supporting the back surface of the main member of the finger bar at the base end of the support arm. Then, shock and noise are generated, and the conventional problem that the load center loss amount had to be sacrificed in order to prevent shock and noise was solved at once, and shock and noise during dumping of the hinged device were prevented. In addition, there is an effect that the load center loss amount can be minimized.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment in which a vibration isolator is attached downward,
FIG. 2 is a side view of the embodiment similarly mounted upward, FIG. 3 is an explanatory view of the operation, FIG. 4 is an overall perspective view, and FIG. 5 is a side view of a general hinged device. 1: Carriage 2: Support arm 3: Pin 4: Finger bar 5: Dump cylinder 6,7: Main member of finger bar 8: Bracket 9: Shock absorbing anti-vibration material F: Fork

Claims (1)

[Scope of utility model registration request] 1. A finger bar (4) swingably pivoted through a pin (3) to a support arm (2) projecting from a lower part of a carriage (1) which can move up and down in an inner mast. Is made swingable by a dump cylinder (5) to support the fork via upper and lower main members (6) and (7) provided laterally on the finger bar (4) and to support the base of the support arm (2). At the end,
A hinged device for a forklift, comprising a shock absorbing vibration isolator (9) for supporting a back surface of a main member of the finger bar (4).