Forklift and fork member of the same

Patent metadata

Field	Value
Publication number	US-11136228-B2
Application number	US-201916696042-A
Country	US
Kind code	B2
Filing date	Nov 26, 2019
Priority date	Mar 25, 2019
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

A forklift includes a lift bracket which is supported on a mast so as to be capable of being moved upward or downward along the mast, and a fork member having a fork claw portion on which a pallet is allowed to be placed, and supported on the lift bracket. The lift bracket has a support portion which is on a tip portion of the lift bracket and supports the fork member. When a weight is applied onto the fork claw portion, the fork member is configured to rotate around the support portion which is configured to serve as a pivot, in response to an application force exerted onto the fork claw portion.

First claim

What is claimed is:

1. A forklift comprising:
a lift bracket which is supported on a mast so as to be capable of being moved upward or downward along the mast; and
a fork member having a fork claw portion on which a pallet is allowed to be placed, and supported on the lift bracket,
wherein:
the lift bracket has a support portion which is on a tip portion of the lift bracket and supports the fork member when seen from a side of a vehicle body; and
when a weight is applied onto the fork claw portion, the fork member is configured to rotate around the support portion which is configured to serve as a pivot, in response to an application force exerted onto the fork claw portion.

2. The forklift according to claim 1 , further comprising:
an elastic member between the lift bracket and the fork member facing each other in a horizontal direction,
wherein, when the weight is applied onto the fork claw portion, the fork member is configured to rotate around the support portion which is configured to serve as the pivot, in a direction of the application force due to a stress of the elastic member.

3. The forklift according to claim 2 , wherein the lift bracket includes a spacer member at a position between the lift bracket and the fork member facing each other in the horizontal direction.

4. The forklift according to claim 2 , wherein when the weight is applied to the fork member, the fork member is held on the lift bracket.

5. The forklift according to claim 4 , wherein the elastic member is fixed to the lift bracket without being fixed to the fork member.

6. The forklift according to claim 4 , further comprising:
an elastic support portion between the support portion of the lift bracket and the fork member on a surface where the support portion of the lift bracket and the fork member face each other in a vertical direction,
wherein:
the support portion of the lift bracket includes a lift bracket male-tapered surface that is tapered in the vertical direction; and
the fork member includes a fork member female-tapered surface that is tapered in the vertical direction, and is supported on the lift bracket male-tapered surface by the support portion.

7. The forklift according to claim 4 , wherein the lift bracket includes:
a shaft member extending in the horizontal direction;
a lift bracket upper member which is rotatably supported on the shaft member,
a lift bracket lower member which is below the lift bracket upper member in a vertical direction;
a damper member which is between the lift bracket upper member and the lift bracket lower member to connect the lift bracket upper member and the lift bracket lower member in the vertical direction; and
a lift bracket lateral member which has a lift bracket lateral member male-tapered surface, which is tapered in the vertical direction, in a surface facing the fork member and is provided at least partly around the lift bracket upper member and the lift bracket lower member below an uppermost portion of the lift bracket upper member.

8. The forklift according to claim 4 , wherein the lift bracket includes a receiving member which is below the fork member in a vertical direction and configured to receive the application force which is applied from the fork member in the vertical direction.

9. The forklift according to claim 4 , wherein the elastic member is fixed to the fork member without being fixed to the lift bracket.

10. The forklift according to claim 1 , wherein:
the support portion includes a V-shaped protrusion portion which is a protrusion portion having a V shape; and
the fork member includes a V-shaped recess portion which is a recess portion having a V shape which is supported by the support portion.

11. The forklift according to claim 1 , wherein:
the support portion includes an arc-shaped protrusion portion which is a protrusion portion having an arc shape; and
the fork member includes an arc-shaped recess portion which is a recess portion having an arc shape and having a curvature that is larger than a curvature of the arc-shaped protrusion portion of the support portion.

12. The forklift according to claim 1 , wherein the lift bracket further includes a tilt cylinder which is configured to tilt the fork member at an angle greater than or equal to a deflection angle of the fork member.

13. A fork member of a forklift, which is supported when seen from a side of a vehicle body, by a support portion on a tip portion of a lift bracket which is supported on a mast of the forklift so as to be capable of being moved upward or downward, wherein, when a weight is applied onto a fork claw portion of the fork member, the fork member is configured to rotate around the support portion which is configured to serve as a pivot, in response to an application force exerted onto the fork claw portion.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Hasegawa Noriyuki
• Futahashi Kensuke

Classifications

• B66F9/12

  Platforms; Forks; Other load supporting or gripping members · CPC title

• B66F9/16 Primary

  inclinable relative to mast · CPC title

• B66F9/082

  inclinable · CPC title

• B66F9/07559

  Stabilizing means · CPC title

• F16F15/022

  using dampers and springs in combination · CPC title