JP2001315564A - Body loading-unloading device in truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively provide a body loading-unloading device for reducing motive power and a work space required for loading and unloading in a truck capable of loading a cargo on a body by loading and unloading the body loaded on a car body frame between the car body frame and the ground surface. SOLUTION: The car body frame F is provided with a slider device S longitudinally movable by being connected to the body 3. An auxiliary frame A is overhung in the rear part, and is arranged so as to be collapsible. The slider device S unloads the body 3 on the ground according to the retreat movement, and folds up the auxiliary frame A, and loads the body 3 on the car body frame F according to an advance movement, and overhangs the auxiliary frame A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for loading and unloading a body mounted on a body frame between the body frame and the ground, and loading or unloading the body on the body. The present invention relates to an apparatus for loading and unloading a body of a truck, which can be unloaded.

[0002]

2. Description of the Related Art Conventionally, as an unloading apparatus for a body in the above-mentioned lorry, one disclosed in Japanese Patent No. 2539947 is well known.

In this conventional vehicle, a long lift frame is provided on a vehicle body frame so as to extend rearward from a rear end of the vehicle body frame so as to be tiltable rearward by a lift device. A body provided on the lift frame so as to be able to move back and forth along the lift frame can be unloaded between the vehicle body frame and the ground.

[0004]

However, in such a conventional unloading device, the lift frame for tilting the body on the body frame is formed long enough to protrude from the rear end of the body frame. It is heavy and expensive.

[0005] The lift device requires a driving means such as a high-power cylinder for tilting a long lift frame together with a similarly long body, and the lift device itself becomes expensive.

[0006] Since the lift frame is tilted rearward while being mounted over substantially the entire length of the vehicle body frame, the tilt angle of the lift frame at the time of loading / unloading the cargo becomes large, and a large space is required.

There are problems such as:

The present invention has been made in view of the above circumstances, and provides a new body unloading apparatus for a lorry which improves the conventional body unloading apparatus so as to solve the above problems. It is intended to do so.

[0009]

In order to achieve the above object, the invention according to the first aspect of the present invention is mounted on a body frame so as to be movable back and forth, and can be unloaded between the body frame and the ground. The body and the rear end of the body frame are connected so as to be able to take an extended position and a folded position so as to be rotatable in a vertical direction, and when the body is mounted on the body frame, The body is extended so as to form an extension of the body frame, but is connected to an auxiliary frame that is folded in conjunction with the retreat of the body and a front part of the body, and can move forward and backward along the body frame. A slider device, and a slider drive device for forcibly driving the slider device in the front-rear direction of the vehicle body frame. It is characterized in that it is folded and the body is loaded on the vehicle body frame as it moves forward, and the auxiliary frame is extended. According to this feature, the conventional loading and unloading of the body of this type of truck is performed. The equipment eliminates the need for a long, heavy, and expensive lift frame, which is an essential component, and requires a low-power drive device such as a cylinder to operate the unloading device. Can be provided to
Since the tilt angle at the time of loading and unloading the body can be smaller than that of the conventional one, not only can the above-mentioned work be stabilized, but also the space required for the work, especially the space occupied in the vertical direction is the same as the conventional one. Smaller than things.

According to the second aspect of the present invention, in order to achieve the above object, in the first aspect,
The slider device is provided with a slider provided on the vehicle body frame so as to be movable back and forth, an arm connected to the slider so as to be able to move up and down, and an end to which the body is connected,
And an up-and-down cylinder for forcibly raising and lowering the arm. According to this feature, in addition to the same effect as the invention according to claim 1, a slider for moving and raising and lowering the body is provided. The structure of the device can be simplified, the power required for the movement can be reduced, and the movement of the body and the undulating operation can be facilitated.

Further, in order to achieve the above object, the present invention is characterized in that:
According to the invention described in claim 1, in the apparatus according to claim 1 or 2, the jack for holding the body frame on the ground is provided integrally with the auxiliary frame, and such a feature is provided. According to the present invention, the same effect as that of the first or second aspect of the invention is provided, and the attachment of the jack to the vehicle body frame is simplified.

Further, in order to achieve the above-mentioned object, the present invention is applied to a fourth aspect.
According to the invention described in any one of claims 1, 2, and 3, the body is moved forward on the vehicle body frame so as to be mounted on the vehicle body frame. The jack is automatically folded to the storage position, and the jack is automatically moved to the use position in conjunction with moving the body backward on the body frame so as to be unloaded from the body frame. According to such a feature, the same effects as those of the first, second, and third aspects of the invention are provided, and it is not necessary to separately perform the operation of extending and storing the jack.

According to a fifth aspect of the present invention, in order to achieve the above object, the slider device according to the first or second aspect, wherein the slider device retreats to an intermediate position in the front-rear direction of the vehicle body frame. In response to the temporary stop, the body is tilted backward by a predetermined angle, and in conjunction with the tilt of the body at a predetermined angle, the slider device again holds the body at a predetermined tilt angle while maintaining the body at a predetermined tilt angle. The body can be unloaded to the ground in conjunction with retreating and the slider device retreating to the rearmost position of the vehicle body frame. According to such a feature, the invention according to claim 1 or 2 is provided. In addition to achieving the same effect, the unloading operation of the body can be automated, and the operation by the operator becomes easy.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below based on embodiments of the present invention illustrated in the accompanying drawings.

FIG. 1 is a side view of a lorry equipped with the body unloading device of the present invention, and FIG. 2 is a plan view of the lorry taken along line 2 of FIG.

In FIGS. 1 and 2, a body frame F of a truck has a chassis frame 1 for suspending front and rear wheels.
It is composed of a subframe 2 integrally connected to the chassis frame 1.

A body 3 for carrying an automobile and other luggage is mounted on the body frame F, that is, the sub-frame 2, and the body 3 is slidable in the front-rear direction on the sub-frame 2, and It can be separated from the subframe 2 and grounded on the ground. The body 3 has a deck plate 5 integrally laid on a square frame 4, a front panel 6 is erected at a front end thereof, and a pair of tail gates 7 can be raised and lowered at a rear end thereof. Further, rolling rollers 8 are rotatably supported on both sides of the lower edge of the rear end. A bracket 9 for connecting an arm 12 of a slider device S described later is integrally provided on a lower surface of a front portion of the body 3. When the body 3 is mounted on the vehicle body frame F, the rear portion has a front-rear length that projects rearward from the vehicle body frame F.

The sub-frame 2 is provided with a slider device S connected to the body 3 for moving the body 3 back and forth, and a slider drive device, ie, a chain drive device C, for driving the slider device S. Have been.

Hereinafter, the structures of these devices are shown in FIGS.
3 will be described in detail with reference to FIGS. 3 to 6. FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 2, and FIG. 4 is a partially broken plan view taken along line 4 in FIG. 3. 5, FIG. 5 is a sectional view taken along line 5 of FIG. 4, and FIG. 6 is an enlarged sectional view taken along line 6-6 of FIG.

The slider device S includes a slider 11 and
The arm 1 supported by the slider 11 so as to be able to move up and down.
And an up-and-down cylinder 13 for raising and lowering the arm 12
A pair of left and right slider members 11 extending in parallel with each other and having a channel-shaped cross section.
a is connected integrally by a connecting shaft 15. The arm 12 is formed by integrally connecting a pair of left and right arm members 12a extending parallel to each other by a connecting plate 16, and the base ends of the pair of arm members 12a are:
Short left and right support shafts 1 at the rear end, ie, free end, of slider 11
The arm member 12a is connected to the front lower surface of the body 3 at the front end, i.e., the free end thereof, so that the arm member 12a is rotatable up and down. That is, the free ends of the pair of left and right arm members 12a are rotatably connected to the left and right brackets 9 protruding from the lower surface of the front part of the body 3 by the connecting pins 19. The up-and-down cylinder 13 has a cylinder barrel 13 a connected to an intermediate portion of the connection shaft 15 so as to be rotatable in the up-down direction, and a tip of the piston rod 13 b is connected to a connection plate 16 of the arm 12. Pin connection 20 is provided on the lower surface. Therefore, according to the extension operation of the undulating cylinder 13, the arm 12 is erected as shown by the chain line in FIG. 5, and the front part of the body 3 can be lifted. The front and rear portions of the left and right sides of the slider device S, that is, the left and right ends of the support shaft 22 and the outer ends of the short left and right connection shafts 17 and 18 integrally mounted on the front end of the slider 11, Front and rear rolling wheels 23 and 24 are rotatably supported, respectively, and front and rear rolling wheels 23, 24 and 2 on the left and right sides thereof.
3 and 24 are left and right vertical frames 2a and 2 of the subframe 2.
The rollers are rotatably engaged in left and right guide rails 25 (see FIGS. 5 and 6) formed at a. And
In this slider device S, the rolling wheels 23, 24
By rolling in the left and right guide rails 25, the sub-frame 2 can reciprocate in the front-rear direction.

The slider device S is forcibly driven by a chain drive device C as a slider drive device. Next, the structure of the chain driving device C will be mainly described with reference to FIGS. 1 to 6. As shown in FIGS. 2 and 3, a driving shaft 27 is rotatable at the front of the sub-frame 2. Laid on the
A drive motor 28 is connected to the drive shaft 27. A driven shaft 29 is rotatably supported at the rear of the sub-frame 2. A pair of drive and driven sprockets 30 and 31 are fixed to the drive shaft 27 and the driven shaft 29, respectively, and a pair of chains 32 is suspended between the sprockets 30 and 31. Both ends are symmetrically connected to the front and rear portions of the support shaft 22 that are integrally bridged below the front end of the slider member 11a. Therefore, the slider device S can be forcibly reciprocated along the front-rear direction of the sub-frame 2 by the forward / reverse driving of the drive motor 28.

An auxiliary frame A is provided at the rear of the sub-frame 2. Next, the structure of this auxiliary frame A will be described with reference to FIGS. 1 and 2 and FIGS. 7 to 10. FIG. 7 is an enlarged sectional view taken along line 7-7 in FIG.
Is a sectional view taken along line 8-8 in FIG. 7, and FIG.
FIG. 10 is a cross-sectional view taken along line 9 and FIG. 10 is a side view showing a state where the auxiliary frame is stored.

An auxiliary frame A is provided at the rear end of the sub-frame 2 so as to extend to a use position, ie, an extension position, or to be folded to a storage position. The auxiliary frame A includes a pair of extension frames 38, and these extension frames 38
Is rotatably mounted on the lower edge of the rear end via a bearing 37,
The hinge shaft 36 is rotatably supported in the vertical direction at predetermined intervals in the axial direction at both ends of the hinge shaft 36, and the interval between the extension frames 38 is set to be an extension of the sub-frame 2. , The interval between the vertical frames 2 a of the sub-frame 2. The extension frame 38 is constituted by straight frames having an open front end at the front end and formed in a U-shaped cross section.
As will be described later, the slider 1 is moved from its open front end.
One pair of slider members 11 a is configured to be received together with the rear rolling wheel 24. A stay 39 is provided on the outer surfaces of the pair of extension frames 38 of the auxiliary frame A.
Cylindrical outer jack 40 extending obliquely rearward through
The upper end of the jack outer 40 is also fixed to both ends of the hinge shaft 36. From the lower end of the jack outer 40, a jack inner 41 having a grounding plate 42 fixed to the lower surface is inserted in an extendable manner. It can be fixed. A jack J is constituted by the jack outer 40 and the jack inner 41.

As shown in FIGS.
A stopper 45 is fixed to the rear lower end. When the auxiliary frame A is stored at the folding position, the stopper 45 engages with the jack outer 40 to lock the auxiliary frame A at the storage position. In the free state, the auxiliary frame A rotates downward around the hinge shaft 36 by its own weight, and is folded to the storage position. At this time, the jack inner 41 is adjusted to expand and contract, and the ground plate 42 is placed on the road surface. Grounded. When the auxiliary frame A is stored at the folding position, the jack outer 40 engages with the stopper 45 to lock the auxiliary frame A at the storage position (FIG. 10).
reference). Further, when the auxiliary frame A is pivoted upward around the hinge shaft 36 and protrudes to the protruding position, it can be held so that its upper surface is flush with the upper surface of the sub-frame 2. The extension frame 38 can be an extension of the sub-frame 2 (see FIGS. 7 and 8). In order to hold the auxiliary frame A at the extended position, the locking means E described below is used.
The holding means E is, as shown in FIGS. 7 to 9, fixed to a pair of left and right contact members 46 fixed to the upper left and right ends of the auxiliary frame A, and correspondingly fixed to the rear left and right of the body 3. The body 3 is composed of a pair of abutting members 47. As will be described later in detail, in a process in which the body 3 is loaded on the vehicle body frame F and advances, the abutting member 47 abuts on the abutted member 46, The auxiliary frame A is rotated upward around the hinge shaft 36 against its own weight, and when the mounting of the body 3 on the vehicle body frame F is completed, the auxiliary frame A is held at the use position, that is, the extended position. .

The raising / lowering cylinder 13 of the slider device S and the drive motor 38 of the chain drive device C are both hydraulically driven by a hydraulic pump P driven by a running engine of a truck. FIG. 11 shows the hydraulic circuit. Hereinafter, the hydraulic circuit will be described with reference to FIG.
First and second electromagnetic three-position switching valves V1 and V2 of the valve unit U are connected to an oil passage connecting the hydraulic pump P driven via the PTO and the oil reservoir T, and The first three-position switching valve V1 is connected to the hoisting cylinder 13 via a cylinder driving circuit 50, and the second three-position switching valve V2 is connected to the hydraulic motor 2 via a motor driving circuit 51.
8 is connected. Then, the first three-position switching valve V1
Is switched to the right, the up-and-down cylinder 13 extends, and when it is switched to the left, the up-and-down cylinder 13 contracts. When the second three-position switching valve V2 is switched to the right, the hydraulic motor 28 is driven in the lowering direction, and when it is switched to the left, the hydraulic motor 28 is driven in the lifting direction.

The hydraulic circuit used heretofore is of a conventionally known type and is not the gist of the present invention, so that a detailed description thereof will be omitted.

Next, the operation of this embodiment will be described mainly with reference to FIGS.

FIG. 12 is a side view showing the movement of the slider device at the time of unloading the body, FIG. 13 is a view showing the unloading process of the body onto the body frame, and FIG.
It is a 4 arrow view enlarged view.

FIGS. 1 and 12 schematically show the arrangement of detection sensors necessary for carrying out the unloading operation of the body 3 described below, ie, the first, second and third proximity sensors S1, S2 and S3. The first proximity sensor S1 detects that the slider device S has reached an intermediate position, and the second proximity sensor S2 has
The tilt at a predetermined angle is detected.
The proximity sensor S3 detects that the slider device S has reached the rearmost position.
2 and S3 are disposed between the subframe 2 and the slider device S, for example.

First, FIG. 13A shows a state in which a body 3 carrying a passenger car as a load is mounted at a traveling position on a body frame F of a lorry. The frame A extends to the use position and forms an extension of the sub-frame 2, while the jack J provided on the auxiliary frame A is in the storage position, and the slider device S is in the front position (FIG. A) position).

Next, when the hydraulic motor 23 of the chain drive unit C is driven in the lowering direction to unload the passenger car from the loaded state shown in FIG. 13A to the ground, the chain drive unit C is operated, and the slider is moved. Apparatus S performs subframe 2
Starting to move backward upward, the body 3 connected to the slider device S also moves backward. When the slider device S reaches the intermediate position (the position (b) in FIG. 12), the body 3 moves to the position shown in FIG.
As shown in FIG. 2 (b), when the first proximity sensor S1 moves to the intermediate position on the sub-frame 2, the first proximity sensor S1
, The operation of the hydraulic motor 28 is stopped, the slider device S stops at the intermediate position, and the up-and-down cylinder 13 of the slider device S is extended halfway. Thereby, as shown in FIG. 13C, the body 3 tilts backward by a predetermined angle. At this time, since the center of gravity of the body 3 is moving backward, the thrust of the undulating cylinder 13 can be small. In addition, the rearward movement of the body 3 causes the contact member 47 provided there to be separated from the contacted member 46 of the auxiliary frame A. Therefore, the auxiliary frame A is folded by its own weight around the hinge shaft 36 to the folded position. Pivots, while jack J is in the overhang position.
Due to the weight of the body 3 having moved rearward, the body frame F, which receives the weight thereof, has its rear portion slightly lowered slightly due to the bending of the rear wheel suspension spring, and the grounding plate 42 of the jack J is grounded. The frame F is stably supported.

When the tilt of the body 3 at a predetermined angle is detected by the second proximity sensor, the extension operation of the up-and-down cylinder 13 is stopped, and the hydraulic motor 28 is restarted.

According to the restart of the hydraulic motor 28, the slider device S moves rearward again, and the body 3 moves rearward while maintaining the predetermined tilt angle, and as shown in FIG. The end rolling roller 8 is grounded on the ground.

Further, as the hydraulic motor 28 continues to be driven, the slider device S also continues to move backward, and the slider 11 of the slider device S moves from the vertical frame 2a of the sub-frame 2 to the extension frame 38 of the auxiliary frame A. To the slider 1 as shown most clearly in FIG.
The rear rolling wheel 24 at one rear end rolls in the extension frame 38 to reach the rear end, and the front rolling wheel 23 reaches the rear end position of the vertical frame 2 a of the sub-frame 2. When the slider 11 comes to the rearmost position (the position (c) in FIG. 12),
The third proximity sensor S3 detects this and detects the undulating cylinder 1
3 is again extended, and the arm 12 of the slider device S
Can be rotated rearward to ground the body 3 on the ground as shown in FIG. As a result, the load of the body 3 and the passenger car does not act on the body frame F, and the grounding plate 42 of the jack J floats above the ground.
The passenger car on the body 3 can travel on its own and be unloaded to the ground.

In order to load the body 3 on the vehicle body frame F, the operation reverse to the above is performed.

As described above, in this embodiment, the body 3 is stacked between the vehicle body frame F and the ground by moving the relatively lightweight, small, and small-capacity slider 11 along the vehicle body frame. Since it can be unloaded, the power for loading and unloading is greatly reduced as compared with the conventional one equipped with a lift frame, and a small capacity is sufficient, and the body 3 is moved backward on the body frame F. Since it is moved and then tilted, its tilt angle is reduced, and the height of the body 3 can be kept low when loading and unloading luggage, and the space required for the unloading work, especially the space in the height direction, is reduced. It is possible to shorten the work time and work indoors. Also, since the jack J is provided integrally with the auxiliary frame A, their attachment to the body frame is simplified, It is possible to overhang of jack J in conjunction with the wholesale work of the duck body 3. Further, the unloading work can be automated, and the operation of the worker becomes easy.

Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various embodiments are possible within the scope of the present invention. For example, in the above-described embodiment, the body frame of the lorry is constituted by the chassis frame and the subframe. However, this may be constituted only by the chassis frame. Further, in the above-described embodiment, the free end of the arm of the slider device is supported by the lower part of the body, and they are always connected.However, the arm and the body can be separated. For example, if they are connected so that they can be inserted and removed with pins, the body can be made detachable. Further, the extension and storage of the auxiliary frame and the extension and storage of the jack may be performed by separate driving means, for example, a cylinder.

[0038]

As described above, according to the first aspect of the present invention, the conventional unloading apparatus for a body of a truck of this type requires a long and heavy component which is an essential component. There is no need for an expensive and expensive lift frame, and a low-power driving device such as a cylinder for operating the unloading device can be provided at a low cost. Since the corners are smaller than in the conventional case, the work can be stabilized, and the space required for the work, particularly the space occupied in the vertical direction, can be reduced.

According to the second aspect of the present invention, the same effect as that of the first aspect of the present invention can be obtained, and the structure of the slider device for moving and raising and lowering the body can be simplified. The power required for the movement can be reduced, and the movement and the undulating operation of the body can be facilitated.

Further, according to the third aspect of the present invention,
The same effect as that of the first or second aspect of the invention is obtained, and the attachment of the jack to the vehicle body frame is simplified.

Further, according to the fourth aspect of the present invention,
In addition to providing the same effects as those of the first, second, or third aspect of the present invention, it is not necessary to separately perform the operation of extending and storing the jack.

Further, according to the fifth aspect of the present invention, the same effects as those of the first or second aspect of the present invention can be obtained, and further, the unloading and unloading of the body can be automated. Operation becomes easy.

[Brief description of the drawings]

FIG. 1 is a side view of a lorry equipped with a body unloading device.

FIG. 2 is a plan view of the lorry as viewed in the direction of arrows 2 in FIG.

FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is a view taken in the direction of arrow 4 in FIG. 3;

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

FIG. 6 is an enlarged sectional view taken along line 6-6 in FIG. 3;

FIG. 7 is an enlarged sectional view taken along line 7-7 in FIG. 2;

8 is a sectional view taken along line 8-8 in FIG. 7;

9 is a sectional view taken along lines 9-9 in FIG.

FIG. 10 When the auxiliary frame is folded (when the jack is overhanging)
Side view showing the state of

FIG. 11 is a hydraulic circuit diagram.

FIG. 12 is a side view showing the movement of the slider device when unloading the body.

FIG. 13 is a view showing a process of loading and unloading the body on the body frame.

FIG. 14 is an enlarged view of FIG.

[Explanation of symbols]

 2 ··· Sub-frame 11 ··· Slider 12 ··· Arm 13 ··· Undulating cylinder A ··· Auxiliary frame C ··· Slider driving device (chain driving device) F ··· Body frame J: Jack S: Slider device

Claims (5)

[Claims] 1. A body (3) mounted on a body frame (F) so as to be movable back and forth, and capable of being unloaded between the body frame (F) and the ground, and a rear end of the body frame (F). The body (3) is connected rotatably in the vertical direction so as to be able to take an overhang position and a folding position, and when the body (3) is mounted on the body frame (F), (F) is extended so as to form an extension, but is connected to an auxiliary frame (A) which is folded in conjunction with the retreating movement of the body (3), and is connected to a front part of the body (3); Slider device (S) movable back and forth along body frame (F)
A slider driving device (C) forcibly driving the slider device (S) in the front-rear direction of the vehicle body frame (F),
The slider device (S) unloads the body (3) to the ground with the backward movement and folds the auxiliary frame (A), and also moves the body (3) on the body frame (F) with the forward movement. A loading / unloading apparatus for a body in a lorry, wherein the loading and unloading of the auxiliary frame (A) is performed. 2. The slider device (S) includes a slider (11) provided on the vehicle body frame (F) so as to be movable back and forth, and a slider (11) connected to the slider (11) so as to be able to move up and down. Arm (1) to be connected to (3)
2. The body loading and unloading device for a lorry vehicle according to claim 1, further comprising 2) and an up / down cylinder (13) forcibly operating the arm (12). 3. 3. A jack (J) for holding the vehicle body frame (F) on the ground is provided on the auxiliary frame (A).
3. The apparatus for unloading and loading a body in a lorry according to claim 1, wherein the apparatus is integrally provided. 4. The jack (J) is retracted in conjunction with moving the body (3) forward on the body frame (F) so as to be mounted on the body frame (F). Position so that the body (3) can be automatically unfolded from the body frame (F).
The cargo according to claim 1, 2 or 3, wherein the jack (J) is automatically extended to a use position in conjunction with moving backward on the vehicle body frame (F). An unloading device for bodies in automobiles. 5. The body (3) is tilted rearward by a predetermined angle in conjunction with the slider device (S) retreating to an intermediate position in the front-rear direction of the vehicle body frame (F) and temporarily stopping. In conjunction with the tilt of the body (3) at a predetermined angle, the slider device (S) retreats again while holding the body (3) at the predetermined tilt angle, and the slider device (S) is The body loading / unloading device according to claim 1 or 2, wherein the body (3) can be unloaded to the ground in conjunction with retreating to the rearmost position of the frame (F).