JP2900214B2 - Control device in loading / unloading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage cylinder and a lifting cylinder, which move a receiving table between a projecting position at the rear of a vehicle body and a storing position at a lower part of the vehicle body. The present invention relates to a control device in a loading tray elevating device that is raised and lowered at a rear overhang position.

[0002]

2. Description of the Related Art Such a loading tray lifting device is disclosed by the present applicant.
It has already proposed in the open flat 5-238304 JP.

[0003]

By the way, in order to store the loading tray with the above-mentioned conventional loading tray elevating device, first, the upper link and the lower link which are located at the 0-position at the rear of the vehicle body by the lifting cylinder are moved to the first predetermined angle. After that, both the links are rotated to the second predetermined angle by the storage cylinder and moved to the lower part of the vehicle body, and both links are raised by the lifting cylinder to move the load receiving table to the storage position.

However, since the conventional had confirmed the angle of the upper link and lower link by actuating the lifting cylinders and storage cylinder Linda visually, operation is complicated, yet there is a problem that requires skill to the operation Was.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a control device in a loading tray lifting device capable of storing and extending the loading tray with a simple operation. .

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method of manufacturing a vehicle in a lower part of a vehicle body around a left-right rotation axis thereof.
A first mounting member rotatably mounted, and the first mounting member;
The member pivots between a predetermined storage position and a use position.
A second mounting member connected a storage cylinder for driving the first mounting member, the first mounting member via the upper link and lower link constituting a flat row link mechanism, provided in the second mounting member And a lifting cylinder that rotates the upper link and the lower link with respect to the first mounting member, and lifts while holding the first mounting member in the use position.
Activate the lowering cylinder to move the upper link and lower link
The load is received by rotating up and down with respect to the first mounting member.
The platform can be moved up and down with the rear of the vehicle extended.
When storing the loaded cradle, the lifting cylinder
Link and lower link to the first predetermined angle with respect to the vertical line
After turning, the first mounting member is moved by the storage cylinder.
Rotate to the retracted position and lead the upper link and lower link
Rotate to a second predetermined angle with respect to the straight line,
The upper link and lower link are raised and rotated by the
The upper link and lower
Link that can detect the rotation angle of the part link with respect to the vertical line
The rotation angle detection sensor and the output of the link rotation angle detection sensor
Control means for controlling both cylinders based on the force,
The control means is configured to first control the link rotation angle when the receiving table is stored.
Based on a comparison between the detection angle of the detection sensor and the first predetermined angle
Operate the lifting cylinder to move the upper link and lower link
By turning it upward or downward
The angle is approached to the first predetermined angle, and then the detected angle is set to the first predetermined angle.
As soon as the angle is reached, the operation of the lifting cylinder is stopped, and the operation of the storage cylinder is started.
As the angle becomes the second predetermined angle, the storage cylinder
Stop the operation and start the operation of the lifting cylinder.
Characterized in that that.

[0007]

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

FIGS. 1 to 11 show an embodiment of the present invention. FIG. 1 is a rear side view of the body of a luggage carrier, and FIG.
FIG. 3 is an enlarged sectional view taken along the line 3-3 in FIG. 1, FIG. 4 is an enlarged sectional view taken along the line 4-4 in FIG. 2, FIG. 8 is an explanatory diagram of the operation, FIG. 9 is an enlarged view in the direction of the arrow 9 in FIG. 6, FIG. 10 is a configuration diagram of the control system, and FIG.

As shown in FIGS. 1 to 3, a packing box 5 supported on a vehicle body 2 of a luggage carrier 1 via main beams 3, 3 extending in the front-rear direction and auxiliary beams 4 extending in the left-right direction. A rear door 6 for opening and closing the rear opening is provided. A pair of left and right brackets 7, 7 provided at the rear end of the vehicle body 1 rotatably support a pipe-shaped rotating shaft 8 extending in the left-right direction via a pair of bearings 9, 9. An arm 10 fixed to the center of the rotating shaft 8
The tip has an output rod 11 ₁ of the storage cylinder 11 which is supported on the vehicle body 2 is connected, the rotary shaft 8 is rotated by expansion and contraction drives the storage cylinder 11.

A pair of first mounting members 12, 12 are fixed to both left and right ends of the rotating shaft 8. The first mounting members 12 and 12 are each formed of an equilateral triangular plate, and are fixed to the rotation shaft 8 at one vertex, and substantially L at the other two vertices.
Upper links 13, 13 and lower links 14, 14 in the shape of a letter
Is pivoted. A pair of left and right second mounting members 1 are provided at the distal ends of the upper links 13, 13 and the lower links 14, 14.
5 and 15 are pivotally supported, and these first mounting members 12 and
12, upper links 13, 13, lower links 14, 14, and second mounting members 15, 15 constitute a parallel link mechanism.

[0011] receiving platform 16 which is pivotally supported on lower ends of the pair of second attachment members 15 and 15, the front side of the main body portion 16 _1, and a subsequent is pivotally supported on the side folds 16 _2. When placing the luggage receiving platform 16, the main body portion 16 ₁ and the second mounting member 1 to hold the receiving platform 16 in the use position of the horizontal position
5,15 and are connected by a bending link 17, 17, and folded portion 16 ₂ pivots on the body portion 16 ₁ and the same plane. When the receiving table 16 is not used, the receiving table 16 stands between the pair of second mounting members 15, 15, and the pin holes 16 ₃ , 16 ₃ of the main body 16 _{1 and} the pins of the second mounting members 15, 15. is secured by a pin 18 which is inserted into the hole 15 _1, 15 ₁ (see FIG. 6). At this time, the folding unit 16 ₂ is rotated to a position overlapping with the main body portion 16 _1. Receiving platform 16
There when in the upright position shown in FIG. 6, receiving platform lock detecting sensor 2 consisting proximity switch magnet 19 provided on one end surface of the main body portion 16 ₁ is provided on one of the second mounting member 15
0 (see FIG. 9).

A pair of first fixed first and second ends fixed to the left and right ends of the rotating shaft 8.
A pair of auxiliary mounting members 21 and 21 of the same shape are fixed to the inside of the mounting members 12 and 12, and the first mounting members 12 and 12 are fixed to each other.
Lifting cylinder 2 between the auxiliary mounting members 21 and 21
2,22 are pivoted. The output rods 22 ₁ , 221 of the lifting cylinders 22, 22 are connected to the left and right upper links 13, _1.
3 are fixed to the first mounting members 12 and 12 and are pivotally supported by the first mounting members 12;
3 and 23 are connected to arms 25 fixed to pins 24, 24 pivotally supported coaxially.
By swinging the upper links 13 and 13 by extending and retracting the upper and lower links 2 and 22, the loading tray 16 can be moved up and down between the solid line position and the chain line position in FIG. The lifting cylinders 22 are also used when the loading table 16 is stored in the lower part of the vehicle body 2.

As is apparent from FIG. 2, a non-contact type link rotation angle detection sensor 27 is provided on the end face of the pin 23 integrated with the upper link 13 on the left side. The link rotation angle detection sensor 27 detects the rotation angle of the pin 23 with respect to the vertical line,
That is, the rotation angle θ of the upper links 13, 13 with respect to the vertical line can be detected over each of 45 ° before and after. Therefore , the state of the upper links 13, 13 in FIG. First predetermined angle θ = α = 40 ° formed with base of upper link 13)
7 ( the second predetermined angle θ = β = 40 between the vertical line L and the base of the upper link 13).
°) and is detectable.

Next, the structure of the safety device 28 for locking the rotating shaft 8 between the loading tray elevating operation state and the loading tray storage state will be described with reference to FIGS.

The safety device 28 includes a pair of locking members 30, 30 fixed to the outer periphery of the rotating shaft 8 via cylindrical members 29, 29.
And bearing members 31 fixed to the left bracket 7
The operating lever 32 pivotally supported by the brackets, the driven shaft 33 pivotally supported by the bearing members 31 fixed to the right bracket 7, and the locking members 30 fixed to the operating lever 32 and the driven shaft 33 respectively. Engageable stoppers 34, 34
And a connecting rod 36 for mutually connecting the arms 35, 35 fixed to the operating lever 32 and the driven shaft 33, respectively.

When the operating lever 32 is gripped and rotated, the operating lever 32 and the driven shaft 33 are rotated in conjunction with each other, and the stoppers 34, 34 are locked at a locked position shown by a solid line in FIG. Stop at any of the locked positions. As shown in FIG. 4, when the stoppers 34, 34 are in the locked position, the first contact surfaces 34 ₁ , 34 ₁ ,
34 ₁ pivot shaft 8 when in contact with the locking member 30, 30 is locked to the receiving platform lift operating state and the second abutment surface 3
4 _2, 34 ₂ when comes into contact with the locking member 30, 30 pivot shaft 8 is locked before receiving platform retracted state. When the rotation shaft 8 is locked, that is, when the first mounting members 12 and 12 fixed to the rotation shaft 8 are locked, the stopper 34
A mounting member lock detecting sensor 38 comprising a proximity switch provided between the bearing members 31
Is turned on.

As shown in FIG. 10, an oil pump P for supplying oil from an oil tank T and the lift cylinder 2
Between the second and storing cylinder 11, the first solenoid valve V ₁ and the second solenoid valve V ₂ is interposed, respectively. Solenoid SO of first solenoid valve V ₁
L1, SOL2 and the second solenoid solenoid valve V ₂ SOL3, SOL4 are connected to the electronic control unit U comprising a microcomputer. The electronic control unit U is connected to an operation switch S provided on the left rear portion of the vehicle body 2 in addition to the loading tray lock detection sensor 20, the link rotation angle detection sensor 27, and the attachment member lock detection sensor 38 (FIG. 1). reference). The operation switch S is the first button B ₁
And the second button B ₂ , the first button B ₁ is used both when raising the receiving tray 16 and when extending the receiving tray 16, and the second button B ₂ is used to lower the receiving tray 16. The case and the case where the receiving tray 16 is stored are shared.

Next, the operation of the embodiment of the present invention having the above-described configuration will be described with reference to the flowchart of FIG.

When loading / unloading the cargo box 5 by raising / lowering the loading table 16, the stopper 3 of the safety device 28 is used.
The first mounting members 12, 12 are locked by locking the rotating shaft 8 by engaging the first contact surfaces 34 ₁ , 34 ₁ of the rotating shafts 4 with the locking members 30, 30 of the rotating shaft 8. used as shown in FIG. 1, 6
Lock in position for use . In this state, the operation switch S is moved in step S1 of the flowchart in order to raise and lower the receiving tray 16.
Is operated, the first mounting members 12, 12 are locked, that is, since the rotating shaft 8 is locked and the mounting member lock detection sensor 38 is ON, step S2 is performed.
Is NO and the process moves to step S3.

In step S3, step S1
In If the first button B ₁ of the operation switch S to raise the receiving platform 16 is pressed, the lift by the first solenoid solenoid SOL1 of valve V ₁ is excited by a command from the electronic control unit U in FIG. 10 The loading cylinder 22 is driven to extend, and the load receiving table 16 is raised via the upper links 13 and 13 and the lower links 14 and 14 while maintaining the horizontal posture (step S4). On the other hand, in step S3, the if second button B ₂ of the operation switch S so as to lower the receiving platform 16 in step S1 is only to be pressed, the first solenoid cylinder lifting solenoid SOL2 is energized the valve V ₁ 22 Is driven to contract and the receiving platform 1
6 descends while maintaining the horizontal posture (step S5).

As described above, the mounting member lock detection sensor 3
If the 8 is ON, the first button B ₁ and the second button B ₂ of the operation switch S is preferentially function as a lifting of the receiving platform 16, by selectively pressing one of them The receiving table 16 can be raised and lowered.

When the loading / unloading operation of the package is completed, the
First, the operating lever 32 of the safety device 28 is operated to release the stoppers 34, 34 from the locking members 30, 30, thereby making the rotating shaft 8 rotatable. Is rotated to a position overlapping the second mounting members 15 and 15 and locked by the pins 18 and 18.

From this state, in step S1, the receiving table 16
When pressing the second button B ₂ of the operation switch S so as to store, since the mounting member lock detection sensor 38 is OFF in step S2, the process proceeds to step S6. In step S6, the second storage for storing the receiving tray 16 in step S1 is performed.
Since the button B ₂ is pressed, the answer proceeds to step S7 becomes to YES. In step S7, as described above, the loading tray 16 is locked at the standing position overlapping the second mounting members 15, 15, and the loading tray lock detection sensor 20
Is ON, the answer is YES, and the routine goes to Step S8.

In step S8, the angle θ detected by the link rotation angle detection sensor 27 is compared with a first predetermined angle α = 40 ° (see FIG. 6). That is, if the detected angle θ is larger than α, the lifting / lowering cylinder 22 is contracted to drive the upper links 13 and 13 and the lower link 1 in step S9.
4 and 14 are lowered, and if the detected angle θ is smaller than α, in step S10 the lifting cylinder 2
2 is extended and the upper links 13, 13 and the rotating member links 14, 14 are raised. And the detection angle θ
Is equal to α and the state shown in FIG. 6 is reached, step S1
Move to 1.

In step S11, the electronic control unit U
Storing cylinder 11 by the second solenoid solenoid SOL3 of the valve V ₂ is energized by a command from
Are driven to extend, and the rotation shaft 8 rotates, so that the upper links 13, 13 and the lower links 14, 14, together with the first attachment members 12, 12, rotate from the state of FIG. 6 to the state of FIG. Eventually, the first mounting members 12, 12 are shown in FIG.
When the storage position is reached and the detection angle [ theta] of the link rotation angle detection sensor 27 reaches the second predetermined angle [beta] = 40 [deg.] And the state shown in FIG. The cylinder 22 is driven to contract, and the upper link 13,
The storage of the receiving table 16 is completed by the rotation of the lower link 13 and the lower links 14 from the state of FIG. 7 to the state of FIG.

When the receiving table 16 is stored in this way, the rotation shaft 8 is locked by the safety device 28 so that the receiving table 16 is not lowered during traveling of the vehicle.

On the other hand, the loading tray 1 in the stored state shown in FIG.
6 when the protruding state shown in FIG. 6, when pressing the first button B ₁ of the operation switch S to issue a receiving platform 16 Zhang in step S1 after releasing the safety device 28, the step S
Since the attachment member lock detection sensor 38 has been turned off in step 2, the process proceeds to step S6. In step S6, since the first button B ₁ of receiving platform 16 ChoIzuruyo at step S1 is pressed, step the answer becomes NO S1
Move to 4. In step S14, the first solenoid lifting cylinders 22 solenoid SOL1 is energized the valve V ₁ is driven extended, upper link 13 and lower link 14, 14 toward the state of FIG. 7 from the state of FIG. 8 Rotate.

Subsequently, in step S15, the angle θ detected by the link rotation angle detection sensor 27 is a predetermined angle β = 40 °
When a state of Fig. 7 reached, in step S16 the second solenoid valve V ₂ storage cylinder solenoid SOL4 is energized is deflated driven, first mounting member 1
Upper links 13 and 13 and lower link 1 together with 2 and 12
4, 14 rotate from the state of FIG. 7 toward the state of FIG.
The extension of the cradle 16 is completed.

In this way, when the overhang of the receiving table 16 is completed, the safety device 28 is operated to push the first button B ₁ or the second button B ₂ of the operation switch S to raise and lower the receiving table 16. Can be done.

Thus, the first button B is used in both the case where the receiving table 16 is stored and the case where the receiving table 16 is extended.
Simply pressing the _first or second button B _2, since the operation of the storage cylinder 11 and the operation of the elevating cylinder 22 is automatically switched at the appropriate time, receiving platform without requiring a complicated operation 16 Can be easily stored and extended.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various design changes can be made.

For example, the first solenoid valve V ₁ and the second solenoid valve V ₂ may be controlled by a relay circuit instead of being controlled by the electronic control unit U. In the embodiment, the link rotation angle detection sensor 2
7, when the angle of the first link 13 is detected, the link rotation angle detection sensor 27 is supported by a pin 23 that rotates integrally with the first link 13. May be supported by the first link 13 itself or another pin 24, and the angle of the second link 14 may be detected instead of detecting the angle of the first link 13.

[0033]

As described above, according to the present invention, the upper phosphorus
The angle of rotation of the link and lower link with respect to the vertical line can be detected.
Link rotation angle detection sensor and this link rotation angle detection sensor.
Cylinder for raising and lowering and syringe for storage based on sensor output
Control means for controlling the
When storing the loading table, first detect the link rotation angle detection sensor.
Lift cylinder based on a comparison between the angle and the first predetermined angle.
Activate the upper link and lower link to determine
By rotating the roller, the rotation angle is set to a first predetermined angle.
Degrees, and then the detection angle becomes the first predetermined angle.
In response, the operation of the lifting cylinder is stopped and the storage
The operation of the cylinder is started, and then the detected angle is set to the second predetermined angle.
When the operation of the storage cylinder is stopped
In both cases, the operation of the lifting cylinder is started , so the operator does not need to judge the operation timing of both cylinders one by one. , So the loading in the storage process
Ku always is properly up and down the rotation such that the colliding on the ground cradle
It can be stored compactly below the vehicle body.

In particular, when starting storage, each link (subordinate
No matter what the rotation position of the loading table) is,
The position of each link (accordingly, the load
Pedestal) in both directions up and down to the first predetermined position
Because you can get to the store quickly,
You can start efficiently and quickly.

[Brief description of the drawings]

FIG. 1 is a side view of a rear part of a vehicle body of a luggage carrier.

FIG. 2 is a view in the direction of arrows in FIG. 1;

FIG. 3 is a view taken in the direction of arrows 3-3 in FIG. 1;

FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. 2;

FIG. 5 is a view in the direction of arrows in FIG. 4;

FIG. 6 is an explanatory diagram of an operation.

FIG. 7 is an explanatory diagram of an operation.

FIG. 8 is an explanatory diagram of an operation.

FIG. 9 is an enlarged view in the direction of arrow 9 in FIG. 6;

FIG. 10 is a configuration diagram of a control system.

FIG. 11 is a flowchart illustrating an operation.

[Explanation of symbols]

8 pivot shaft 11 storing cylinder 12 first attachment member 13 the upper link 14 lower link 15 second mounting member 16 receiving platform 22 lifting cylinders 27 linked rotation angle detecting sensor α first predetermined angle β second predetermined angle U electronic control unit (control means)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-238304 (JP, A) JP-A-59-96024 (JP, A) JP-A-59-53239 (JP, A) JP-A-63-1988 22740 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) B60P 1/44

Claims (1)

(57) [Claims] 1. A left-right rotation axis around a lower part of a vehicle body.
A first mounting member (12) rotatably mounted on the
Of the first mounting member (12) is in a predetermined storage position and a predetermined use position.
A storage cylinder for driving the first mounting member (12) so as to pivot between (11), first through the upper links constituting the flat row link mechanism (13) and lower link (14) 1 The second mounting member (1) connected to the mounting member (12)
5) and a loading table (1) provided on the second mounting member (15).
6) and an elevating cylinder (22) for rotating the upper link (13) and the lower link (14) with respect to the first mounting member (12), using the first mounting member (12).
The lifting cylinder (22) while holding it in the working position
The upper link (13) and the lower link (14)
1 by vertically rotating with respect to the mounting member (12).
With the loading platform (16) extended to the rear of the vehicle.
When storing the receiving stand (16),
The upper link (13) and the lifting cylinder (22)
The lower link (14) is at a first predetermined angle (α) with respect to the vertical line.
Until it is rotated by the storage cylinder (11).
1 Rotate the mounting member (12) to the retracted position and
(13) and lower link (14)
Rotate to a predetermined angle (β), and then move the cylinder up and down (2
2) upper link (13) and lower link (14)
In the lifting / lowering device for rotating the pallet, the upper link (13) and the lower link (14)
Link rotation angle detection sensor that can detect the rotation angle with respect to
(27) and the output of the link rotation angle detection sensor (27).
Control means (U) for controlling both cylinders (11, 22);
Comprising a, the control unit (U) is ahead when stored in receiving platform (16)
Angle (θ) of the link rotation angle detection sensor (27)
Lifting cylinder based on a comparison with a first predetermined angle (α)
(22) to operate the upper link (13) and the lower link
By turning the lock (14) upward or downward.
Approach the first rotation angle (α), and then
Detection angle (theta) is to initiate the operation of the storage cylinder (11) stops the operation of the lifting cylinders (22) in response to become the first predetermined angle (alpha), followed by detection angle
(Θ) becomes the second predetermined angle (β),
Cylinder for lifting and lowering the operation of the Linda (11)
(22) A control device in the loading / unloading device, which starts the operation of (22) .