JPH0632948Y2 - Push-pull device for cargo handling vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a push-pull device for a cargo handling vehicle.

[Prior Art] In a push-pull device of a cargo-handling vehicle that pulls a load on a fork or pushes a load on a fork by a face and a gripper that can be moved back and forth, a link mechanism for adjusting the angle of a face to move back and forth is hydraulically adjusted. It was done using a cylinder.

[Problems to be solved by the device]

With a structure that moves the face back and forth with a hydraulic cylinder, there is a limit to the responsiveness until the hydraulic cylinder is pressed by the push-pull operation lever, and the controllability when a slight movement of the face is required, and the movement of the face is sudden. There were times when the movement was jerky.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a push-pull device for a cargo handling vehicle that can smoothly move a face.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a push-pull device for a cargo handling vehicle that pulls a load on a fork or pushes a load on a fork by a face and a gripper that can move back and forth. The angle of the link mechanism is adjusted by rotating the gear fixed to the link with the gear that rotates by the rotation drive of the electric motor, and the rotation speed control circuit controls the rotation speed of the electric motor according to the operating force of the operating lever. I did it.

[Action]

By moving the push-pull operation lever, the rotation speed of the molding is controlled by the rotation speed control circuit according to the operation force, the electric motor is driven to rotate the gear, and the gear fixed to the link The rotation is given to adjust the angle of the link mechanism.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the push-pull device of a cargo handling vehicle is provided with a base member 2 which can be moved up and down by a mast device 1, and the base end of the base side links 3 and 4 has pins 5 and 6 on the base member 2. The base links 3 and 4 are connected to each other by a pin 7 at their central portions. The front side links 8 and 9 are attached to the tip ends of the base side links 3 and 4.
The rear ends of the front links 8 and 9 are swingably connected in the vertical direction, and the front links 8 and 9 are connected to each other by a pin 12 at the center thereof. The tips of the front links 8 and 9 are face 13
Are connected with pins 14 and 15 to form a link mechanism A. The face 13 is provided with a gripper 16.

A fork 17 is attached to the base member 2.

The base side link 3 and the front side link 8 are connected by a pin 10.

A bracket 18 is formed at the tip of the base side link 4, and a bracket 19 is also formed at the rear end of the front side link 9.
The brackets 18 and 19 are pivotally connected to each other by a shaft 20. An electric motor 21 is attached to the bracket 18 of the base side link 4, and the rotating side of the electric motor 21 is connected to the shaft 20. A gear 22 is fixed to the shaft 20, a gear 23 is fixed to the rear portion of the front link 9, and the gear 22 is a gear 23.
Meshes with.

The electric motor 21 is controlled by a rotation speed control circuit 25 at a rotation speed corresponding to the operation force of moving the push-pull operation lever 24.

Next, the operation will be described.

By moving the push-pull operation lever 24, the rotation speed control circuit 25 controls the rotation speed of the motor according to the operation force, and the electric motor 21 is driven to rotate. The gear 22 is rotated by the rotational driving of the electric motor 21, and the link mechanism A is swung through the gear 23 meshing with the gear 22 to adjust the angle of the link mechanism A, and the face 13 is moved in the front-rear direction. The load 26 is pushed out and the load 26 is pulled up to the fork 17.

[Effect of device]

As described in detail above, the push-pull device for a cargo handling vehicle according to the present invention is a push-pull device for a cargo handling vehicle that pulls a load onto a fork or pushes a load on the fork by means of a face and a gripper that can move back and forth. The angle of the link mechanism for back-and-forth movement is adjusted by rotating the gear fixed to the link with the gear that rotates by the rotational drive of the electric motor, and the electric motor is controlled by the rotation speed control circuit according to the operating force of the operating lever. It is characterized in that the rotation speed is controlled.

Therefore, when the push-pull operation lever is moved, the rotation speed of the motor according to the operation force is controlled by the rotation speed control circuit, the electric motor is driven to rotate the gear, and this gear fixes the gear fixed to the link. The angle of the link mechanism can be adjusted by applying rotation to the.

For this reason, the responsiveness until the electric motor is driven by operating the push-pull operation lever is instantaneous, and the controllability when subtle movement of the face is required is good, so that the movement of the face is smooth. become.

[Brief description of drawings]

FIG. 1 is a side view of a cargo handling vehicle equipped with a push-pull device according to the present invention, FIG. 2 is a perspective view of a II portion of FIG. 1, and FIG. 1 is a mast device, 2 is a base member, 3 and 4 are base links, 8 and 9 are front links, 13 is a face, 16 is a gripper, 17 is a fork, 21 is an electric motor, 22, 23
Is a gear, 24 is a push-pull operation lever, 25 is a rotation control circuit, and A is a link mechanism.

Claims (1)

[Scope of utility model registration request] 1. In a push-pull device of a cargo handling vehicle for pulling a load on a fork or pushing a load on a fork by means of a face and a gripper that can move back and forth, the angle of a link mechanism for moving the face back and forth is electrically adjusted. The rotation of the motor causes the gear that is fixed to the link to rotate, and the electric motor is controlled by the rotation speed control circuit to a rotation speed that corresponds to the operating force of the operating lever. Push-pull device for cargo handling vehicles.