JPH0565766U - Truck tilt switch - Google Patents

Abstract

(57) [Abstract] [Purpose] This is a device for automatically opening and closing the tilt of the truck bed. It can exert a sufficient driving force without using hydraulic pressure, and the opening and closing operation is smooth and the closed state is maintained. It is also possible to provide a tilting switchgear that can be easily attached to an existing truck, is inexpensive, and is easy to maintain and inspect. [Structure] A fulcrum pin 11 is provided on the bottom surface of the floor assembly 1 of the loading platform in parallel with the supporting shaft 7 of the tilt. A drive shaft 16 driven by a motor 14 is provided in parallel with the fulcrum pin 11, and a swing arm 18 having a base end of a connecting member 17 pivotally connected to the tip of the drive shaft 16 is fixed to the seesaw lever 8 The upper end of the pivot is pivotally connected to the outer surface of the tilt 5, and the lower end is pivotally connected to the tip of the linking member 17, and when the tilt is closed, the swing arm 18 and the linking member 17 are held in a substantially straight line. A stopper 21 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device which is attached to a truck bed and automatically opens and closes the tilt of the bed.

[0002]

[Prior Art]

 BACKGROUND ART Conventionally known truck tilt opening / closing devices include ones in which a tilt is vertically slidably attached to a floor assembly and then lifted and lowered to open and close. Since this opening / closing device is located below the platform in the same posture when the tilt is opened, if the tip of the fork of the forklift is collided with the tilt in the open position due to an operation error of the loader, for example. However, there is a problem that the surface of the tilt is damaged and the appearance of the track is impaired.

On the other hand, in a structure in which a swing is provided swingably on a support shaft provided around the floor assembly of a loading platform, there is a device that automatically opens and closes by pushing a push rod from the outside. .. Since this device is opened with the inner surface of the tilt facing outward, the outer surface of the tilt will not be damaged during loading work, but this is not preferable because the push rod sticks out of the load platform.

Further, since the tilt is heavy and requires a strong force for its opening / closing operation, there are some which use a hydraulic drive device as a drive source of the opening / closing device.

[0005]

[Problems to be solved by the device]

 However, the hydraulic drive requires a pump and a hydraulic tank that generate hydraulic pressure, and a check valve is required to keep the tilt in a closed state, which increases the overall cost of the switchgear and imposes a heavy burden on the user. However, there is a drawback that maintenance and inspection becomes troublesome.

The present invention can exert sufficient driving force for opening and closing the tilt without using hydraulic pressure, can smoothly open and close and maintain the closed state, and can be easily attached to an existing truck. The aim is to provide a tilting switchgear that is inexpensive and easy to maintain and inspect.

[0007]

[Means for Solving the Problems]

 The tilt opening / closing device of the present invention has a support shaft 7 around the floor assembly 1 of the cargo bed, and is adopted in the tilt 5 mounted swingably around the support shaft 7. The tilt opening / closing device of the present invention is provided with a fulcrum pin 11 parallel to the supporting shaft 7 of the tilt on the bottom surface of the floor assembly 1, and the fulcrum pin has a base end of a link 12 pivotally connected to an intermediate portion of a seesaw lever 8. An output shaft (drive shaft) 16 of a speed reducer 15 driven by a motor 14 is provided on the floor assembly 1 so as to be parallel to the fulcrum pin 11, and a connecting member is attached to the tip of the drive shaft 16. A swing arm 18 having a base end of 17 pivotally connected thereto is fixed, an upper end of the seesaw lever 8 is pivotally connected to an outer surface of the tilt 5, and a lower end thereof is pivotally connected to a front end of the tie member 17, A stopper 21 for holding the swing arm 18 and the connecting member 17 in a substantially straight line when the tilt is closed is provided.

[0008]

[Action]

 In the tilt opening / closing device of the present invention, when the tilt is in the closed state, the swing arm 18 and the connecting member 17 are substantially aligned with each other, and the stopper 21 prevents the bending, and the tilt 5 is tilted outward. The force to do so is supported by the radial bearing of the drive shaft 16 via the seesaw lever 8 and the swing arm 18.

In order to open the tilt 5, the motor 14 is driven to swing the swing arm 18, and the seesaw lever 8 is supported by a link 12 swinging around a fulcrum pin 11 and is laid down on the floor assembly 1 sideways. Then, the tilt 5 is opened around the support shaft 7.

When the tilt 5 is closed, the motor 14 is rotated in the reverse direction to rock the rocking arm 18 in the reverse direction, and the seesaw lever 8 is rocked in the reverse direction to close the tilt 5. At this time, the swinging end of the swinging arm 18 is regulated by the stopper 21, the seesaw lever 8 comes into close contact with the outer surface of the tilt 5 in parallel, and the link 12, the swinging arm 18 and the connecting member 17 are connected to the seesaw lever 8. To the inside of the floor assembly 1 of the loading platform at a substantially right angle, and does not project to the outside of the tilt.

[0011]

【Example】

 The figure shows an embodiment of the present invention. The floor structure 1 of the truck bed is constructed by horizontally stacking about 10 horizontal joists 2 on two vertical joists (not shown), and arranging a floor board 3 on the floor joists. Is provided. The tilt 5 is attached to the floor assembly 1 by hinges 6 arranged on the floor frame 4, and can be freely opened and closed around the support shaft 7 of the hinge 6. The upper end of the seesaw lever 8 is connected to the center of the outer surface of the tilt 5 by a pin 9, and the lower end of the seesaw lever 8 extends below the floor frame 4 in parallel to the outer surface of the tilt 5.

A fulcrum pin 11 that is parallel to the support shaft 7 is provided on the lower side of the horizontal joist 2, and a basal end of a link 12 that extends to the lower edge of the floor frame 4 is pivotally supported by the fulcrum pin 11. There is. The tip of the link 12 and the middle portion of the seesaw lever 8 are swingably connected to each other by a connecting pin 13 near the floor frame 4. A speed reducer 15 driven by a motor 14 is interposed between the horizontal joists 2, and its output shaft extends in parallel with the support shaft 7 of the bobbin 5 and serves as a drive shaft 16 for opening and closing the tilt. A swing arm 18 having a base end of a connecting member 17 pivotally connected to the drive shaft 16 is fixed to the drive shaft 16, and the end of the connecting member 17 and the lower end of the seesaw lever 8 are connected by a pin 9.

The outer swing end of the swing arm 18 is regulated by a stopper 21 provided on the lateral joist 2, and the regulated position is slightly from the position where the swing arm 18 and the connecting member 17 are in a straight line. It is the position moved to the 3 side.

When the tilt is in the closed state, the swing arm 18 and the connecting member 17 are in a substantially straight line, and the stopper 21 prevents the bending at the connecting portion due to the axial force applied to both the members 18, 17. is doing. Therefore, the force that tilts the tilt 5 outward is supported by the radial bearing of the drive shaft 16 via the seesaw lever 8 and the swing arm 18, and does not act to rotate the drive shaft 16.

The opening / closing operation of the tilt will be described with reference to FIG. When the tilt 5 is in the closed state, the motor 14 is driven to swing the swing arm 18 in the clockwise direction in the drawing to swing the seesaw lever 8 around the connecting pin 13. As a result, the tilt 5 swings around the support shaft 7, and the downward movement of the pin 9 associated with the swinging motion is absorbed by the swinging motion of the link 12 that rotates around the fulcrum pin 11. In this manner, the seesaw lever 8 is supported by the link 12 swinging around the fulcrum pin 11 and moved diagonally downward to the left in the figure, the tilt 5 is opened, and the seesaw lever 8 is stored below the luggage carrier. The contact between the tilt 5 and the floor frame 4 stops the motor 14 and the opening operation is completed. If the loading operation is carried out in this state, there is no risk of damaging the outer surface of 5 even if the fork is mistakenly operated.

When the tilt 5 is in the open state, the motor 14 is rotated in the reverse direction to swing the swinging arm 18 counterclockwise in the figure, and the seesaw lever 8 is swung forward to move outward. The tilt 5 can be swung in the closing direction. When the swing arm 18 contacts the stopper 21, the driving of the motor 14 is stopped.

[0017]

[Effect of the device]

 As described above, since the swing switchgear of the present invention does not require a hydraulic drive source, the entire device can be manufactured at low cost, and the economical burden when installing it on an existing carrier can be reduced. Yes, maintenance is easy. Furthermore, a toggle link is formed by the swing arm and the connecting member, and the rotary motion of the motor is converted into a linear motion via this link, so the movement when opening and closing the tilt is smooth, and tilting of the tilt is prevented. Since it can be received by the radial bearing of the drive shaft, the tilted closed state is reliably maintained. In addition, since the swing movement of the seesaw lever that is stored below the cargo bed is used to open and close the tilt, the tilt opening / closing device does not project to the outside of the cargo bed.

[Brief description of drawings]

FIG. 1 is a perspective view of a tilt opening / closing device.

FIG. 2 is an explanatory diagram of opening / closing operation.

[Explanation of symbols]

 1 Floor assembly 5 Tilt 7 Support shaft 8 Seesaw lever 11 Support point pin 12 Link 14 Motor 15 Reducer 16 Drive shaft 17 Connecting material 18 Swing arm 21 Stopper

Claims (1)

[Scope of utility model registration request] 1. A support shaft for a floor assembly (1) of a truck bed.
(7) is provided and swings around this support shaft (7).
In a track swing opening / closing device that automatically opens and closes (5), a fulcrum pin (11) parallel to the support shaft (7) of the floor is installed inside the floor support (1) support shaft (7). The base end of a link (12) in which the middle part of the seesaw lever (8) is pivotally connected to the tip is pivotally attached to the fulcrum pin (11), and is rotationally driven by the motor (14) to the floor assembly (1). The drive shaft (16) is provided in parallel with the fulcrum pin (11), and the swing arm (18) having the base end of the tie member (17) pivotally connected to the drive shaft (16) is fixed to the seesaw. The upper end of the lever (8) is pivotally connected to the outer surface of the tilt (5), and the lower end thereof is pivotally connected to the tip of the tie member (17).
Swing arm (18) and tether (17) when tilt is closed
A tilting device for a truck provided with a stopper (21) for holding and in a substantially straight line.