JPS6312013Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a cargo loading/unloading device that is incorporated into a truck bed or a trailer that is towed and connected to a tractor to improve the efficiency of cargo handling operations. With the structure in which loading/unloading limit switches are installed on the front and rear inside of the loading platform, if the gate moves diagonally, the reference detection position will shift, making it difficult to accurately detect the loading/unloading end, and the loading platform cannot be used effectively. It was hot.

Therefore, the present invention solves the above-mentioned conventional drawbacks by installing a loading/unloading limit switch that detects the loading/unloading end. It is possible to properly detect the start and end of the movement of the machine to make maximum use of the loading platform, and since the carry-in limit switch and the carry-out limit switch are installed close to each other, the wiring structure is simplified to prevent electrical leakage, etc., and to ensure safe handling. The present invention aims to provide a cargo loading/unloading device for freight vehicles.

An embodiment of the present invention will be described in detail below with reference to the drawings. Figure 1 is a perspective view of the entire truck;
In the figure, 1 is a driver's cab equipped with a drive source for the truck such as an engine and a transmission at the bottom, 2 is a loading platform, 3 is a plurality of running wheels, 4 is a battery, 5 is a frame structure installed on the upper surface of the loading platform 2, and 6 is the Partition gates 8a, 8b, 8c that are approximately the same size as the end surface of the loading platform 2 and are installed on the gate base 7 by reciprocating inside the loading platform 2.
9a, 9b, and 9c have one end connected to the gate base 7, and left, center, and right conveyor belts that slide on the upper surface of the frame structure 5 toward the cargo loading side, and 9a, 9b, and 9c have one end connected to the gate base 7. Partition gate 6
The belts 8a, 8b, and
The other ends of the chains 9a, 9b, 9c are connected in an endless manner through left, center, and right fixing devices 10a, 10b, and 10c, with the other ends of the chains 8c facing the cargo loading side. A bearing chassis 11 is provided at the loading/unloading end of the loading platform 2, and a transmission shaft 12, which will be described in detail in FIG. The left, center, and right sprockets are pivotally supported toward the loading side, and the intermediate portions of each chain 9a, 9b, and 9c are meshed with the sprockets 13a, 13b, and 13c, and the sprockets are rotatably supported on the same shaft toward the loading side. Left/center/right belt pulleys 14a, 14
b, 14c are mounted on the floor of the loading platform 2 on the cargo loading side, and each belt 8a, 8b, 8c is bent and stretched via the belt pulleys 14a, 14b, 14c, and a pair of left and right drives are mounted on the upper surface of the chassis 11. Source 1
5, 16 are installed, and each sprocket 13a, 13b, 13c is
The belts 8a, 8b, 8c and the partition gate 6 are moved back and forth through the chains 9a, 9b, 9c by driving the belts 8a, 8b, 8c in the forward and reverse directions.
It is configured so that cargo A to be placed on the top surface is carried in and taken out.

Further, 17 is a control box that remotely controls the drive sources 15 and 16 and is connected to the rear surface of the loading platform 2; 18 is a power distribution board; 19 is a fuse box;
0 is each belt pulley 14a, 14b, 15c
This is a guide pipe that protects each belt 8a, 8b, 8c at the rear of the belt.

As shown in FIGS. 2 and 3, the frame structure 5
are belts 8a, 8b, 8 in the front and back direction of the loading platform 2.
A plurality of side frames 21 and a central frame 22 are stretched, the rear surfaces of the outer ends of which are brought into sliding contact with each other, and both ends are locked to protrusions 23 provided inside the side frames 21, and a plurality of frames are inserted through the central frame 22. A horizontal frame 24 is horizontally suspended, a vertical frame 25 is stretched over its upper surface, and each belt 8a, 8b, 8c is slid on the upper surface. Further, a chain guide 26 for slidingly contacting the left and right chains 9a, 9c is stretched over the upper surface of the horizontal frame 24 between the vertical frames 25, 25 at the center of the side frame 21 and the central frame 22, and a vertical chain guide 26 for slidingly contacting the left and right chains 9c The chain guide 27, which also serves as the frame 25, is connected to the central frame 22, 22 at the center of the vertical frame 25,
25 is stretched over the upper surface of the horizontal frame 24, and each chain 9a, 9b, 9c is slidably guided.

Furthermore, in FIG.
The connecting pipe 28 and the bearing chassis 11 are connected and fixed with the projecting pieces 29, 29 and the bolts 30, and the loading end sides of the side and central frames 21, 22 are connected to the connecting pipe 28 and the bearing chassis 1.
1, the guide pipe 20 is fitted between the side frames 21 and the central frame 22, and a tightening member 31 to be inserted into each guide pipe 20 is inserted between the side frames 21, 21. , the side portions and the output end sides of the central frames 21, 22 are connected by the pipe 20 and the tightening member 31, and each frame 21, 21, 21, 22, 2 is assembled.
2 and 22 are set to prevent deformation of the frame structure 5, such as misalignment in the direction in which the conveyor belts 8a, 8b, and 8c are stretched.

Next, in FIG. 3, the sliding support structure of the partition gate 6 and gate base 7, and each conveyor belt 8
a, 8b, 8c and each drive chain 9a, 9b,
The tension adjustment of 9c will be explained. A guide rail 32 for guiding the movement of the gate 6 and gate base 7 is provided inside the side frame 21, a sliding member 34 is attached via brackets 33 fixed to both sides of the gate base 7, and the sliding member 34 is attached to the guide rail 32. The ends of each belt 8a, 8b, 8c, which are slidably fitted into the rail 32 and bent upward through the lower end of the gate base 7, are sandwiched between the pressure plate 35 and one side of the gate base 7 by bolts. With this, each belt 8a, 8b, 8c is connected to the gate base 7.

In addition, a hinge 36 serving as a rotation fulcrum is provided on the lower surface of the partition gate 6 and the upper surface of the gate base 7, and the hinge 36 is formed to lie down in the cargo carrying direction of the cargo platform 2. Fixed arms 37 are provided on the lower sides of both sides of the partition gate 6. 6 and the gate base 7 are connected to each other via detachable bolts 38.

On the back side of the gate base 7, on the left when facing the luggage loading side.
Center and right frame bodies 39a, 39b, 39c are provided, and a guide plate 40 for bending and guiding each chain 9a, 9b, 9c upward is fixed to the inner surface thereof, and upper and lower spring seats, tension bolts, tension springs, etc. A tension adjustment member 41 having a tension adjustment member 41 is installed on the upper part of the frames 39a and 39c, and each chain 9a and 9b is connected thereto, and the central chain 9b is a tension adjustment member 41 inserted into the frame 39b. Connected to the bolts, each conveyor belt 8a, 8b, 8c and each drive chain 9
The tension adjustment member 41 is configured to keep the tensions of a, 9b, and 9c constant.

As shown in FIG. 4, reduction gear cases 42a and 42b, which are a pair of left and right drive sources 15 and 16, are mounted on the upper surface of the bearing chassis 11, and a drive motor 43 is mounted above the reduction gear cases 42a and 42b.
drive sprockets 44a, 4 which are supported on the rotating shafts of the motors 43a, 43b;
4b, the torque latches 45a, 45b of the reduction gear cases 42a, 42b, and the torque adjustment bolt 4.
Drive input sprockets 47a, 47b which are pivotally supported on the input shafts having 6a, 46b are connected via drive input chains 48a, 48b, and drive output sprockets 49a, which are pivotally supported on the output shafts of the reduction gear cases 42a, 42b. 49b, and a drive output chain 5 in which driven sprockets 50a and 50b, which are drive input shafts, are inserted into holes 51a and 51b on a transmission shaft 12 that is pivotally supported on a bearing chassis 11.
The drive motor 43 is connected via 2a and 52b.
It is formed to transmit the driving force of a and 43b to the transmission shaft 12.

As shown in FIG. 5, each sprocket 13a, 13c and 50a,
0b is fitted onto the transmission shaft 12 through a key 53, and is engaged and supported on the transmission shaft 12 using a C ring 54, so that the driving force of the drive motors 43a, 43b is transferred to the left and right sprockets 13a, 13c. The chain 9a, 9c is driven in the forward and reverse directions to move the partition gate 6 and the belts 8a, 8b, 8c back and forth, and the sprocket 13b, which is pivotally supported at the center of the transmission shaft 12, is fixed in position by the C ring 54. The sprocket 13b is rotatably supported by the transmission shaft 12, and the central chain 9b and central belt 8b are stretched, so that the skew of the partition gate 6 is alleviated.

As shown in FIG. 6, each belt 8a, 8b, 8c
A carry-in limit switch 55 that detects the carry-in end position
is installed on the upper surface of the bearing chassis 11 in the center, and the tip of the switch arm 55a of the carry-in limit switch 55 is placed between the central frames 22 and 22, and the switch arm 55a of the carry-in limit switch 55 is placed in contact with the switch operation piece 56 provided on one side of the central frame 39b at the center of the gate base 7. At the same time, the unloading limit switch 57 for detecting the unloading end position of each belt 8a, 8b, 8c is placed on one side of the vertical frame 25 between the central frames 22, 22. The switch arm 57a of the carry-in limit switch 57 is disposed at the center and is in contact with the central fixture 10b connecting the central belt 8b and the central chain 9b.
are provided downward, and the drive sources 15 and 16 are configured to be stopped by the carry-in/out limit switches 55 and 57 at the end positions of the movement of the partition gate 6.

FIG. 7 is an electrical circuit diagram of the device, in which the drive motor 4
Forward rotation and reverse rotation switches 58 and 59 provided in the control box 17 are connected to the battery 4 via a fuse 60 provided in the fuse box 19, and to a forward rotation relay 61 via a normally closed contact 55a of a carry-in limit switch 55. The forward rotation switch 58 is connected to the reverse rotation relay 62 via the normally closed contact 57a of the unloading limit switch 57, and the reverse rotation switch 59 is connected to the reverse rotation switch 59, respectively, and the forward rotation switch 58 or the reverse rotation switch 59 is operated.
1, 62 is energized, the forward rotation contact 61a or the reverse rotation contact 62a is turned on, and the drive motors 43a, 43b are operated in the forward or reverse rotation, and each belt is connected to the partition gate 6 through the left and right chains 9a, 9c. 8a, 8b, 8c, and forward/reverse switches 58, 5 through the normally open contacts 55b, 57b of each limit switch 55, 57.
9 is connected to a buzzer 63, and is configured to notify via the buzzer 63 when the partition gate 6 reaches the loading/unloading end position, and 64 is a connector provided on the rear surface of the loading platform 2; A plug 65 is provided at the tip of the control box 17 and is connected to the connector 64.

The present invention is constructed as described above, and when loading/unloading cargo a onto/from the loading platform 2 via the conveyor belts 8a, 8b, 8c, the plug 65 is first fitted into the connector 64, and the control box 17 is rotated in the normal direction. Reverse switches 58 and 59 are connected to forward and reverse relays 61 and 6.
Connect electrically to 2 etc.

When the forward rotation switch 58 is operated, the relay 61 is energized and the forward rotation contact 61a is turned on to operate the drive motors 43a, 43b in the forward rotation, thereby transmitting the output of the drive motors 43a, 43b to the transmission shaft 12 in the normal rotation. Then, the left and right chains 9a, 9c are driven to move each belt 8a, 8b, 8c to the front inside of the loading platform 2 together with the partition gate 6, and the belts 8a, 8
Baggage a is sequentially loaded on the upper surfaces of b and 8c, and the cargo is carried into the loading platform 2.

Furthermore, when the reverse rotation switch 59 is operated, the relay 62 is energized and the reverse rotation contact 62a is turned on to operate the drive motors 43a, 43b in reverse, and the output of the drive motors 43a, 43b is transmitted to the transmission shaft 12 in the reverse direction. - Drive the right chains 9a, 9c to move each belt 8a, 8b, 8c to the rear inside the loading platform 2 together with the partition gate 6,
The cargo a on the upper surfaces of 8b and 8c is sequentially lowered to the outside of the loading platform 2, and the cargo a is carried out.

As shown in the above embodiments, the present invention has a plurality of drive chains 9a, 9b, 9c connected to a plurality of conveyor belts 8a, 8b, 8c, respectively, stretched on the upper surface of a loading platform 2, and each of the belts 8a, 8b. , 8c and one end of each chain 9a, 9b, 9c with each fixture 10.
Each sprocket 13a, 13 is connected at a, 10b, 10c and provided on the transmission shaft at the loading end of the loading platform 2.
Each chain 9a, 9b, 9c via b, 13c
The intermediate portions of each belt 8a, 8b, 8c are bent through each belt pulley 14a, 14b, 14c provided at the discharge end of the loading platform 2, and each belt 8a, 8b, 8c and each chain 9a, 9b are bent. ,9
The other end of c is connected endlessly to the gate base 7 having the partition gate 6 on the top, and each belt 8a, 8b, 8c is attached to the upper surface of a vertical frame 25 installed in the moving direction of each belt 8a, 8b, 8c. In the structure in which the conveyance side is brought into sliding contact, 8a and 8 of each belt
b, 8c A carry-in limit switch 55 for detecting the carry-in end position is provided on the upper surface of the chain tensioning bearing chassis 11 at the inside front of the loading platform 2, and a switch operating piece 56 that is brought into contact with the switch 55 is mounted on the gate base 7. Provided at the center of the back surface, and each belt 8
A carry-out limit switch 57 for detecting the carry-out end positions of the central belts 8b and 8c is provided on one side of the vertical frame 25 at the carry-in end of the central belt 8b.
Since the switch 57 is configured to come into contact with the substantially central position of the center fixture 10b of the center chain 9b, the partition gate 6 can be moved diagonally to the carry-in/out limit switches 55, 57 for detecting the carry-in/out end. Even in such a case, the end of movement of the gate 6 can be properly detected at the center of the partition gate 6, where the deviation of the reference detection position is the smallest, and the loading platform 2 can be used to the maximum extent, and the loading limit switch 55 and the loading limit switch can be easily detected. 57 are placed close to each other,
This has remarkable effects such as simplifying the wiring structure, preventing electrical leakage, etc., and allowing safe handling.

[Brief explanation of the drawing]

Figure 1 is an overall perspective view of the truck, Figure 2 is a plan view of the frame structure, Figure 3 is a sectional rear view of the loading platform,
FIG. 4 is a cross-sectional view of the drive section, FIG. 5 is a cross-sectional view of the main parts, FIG. 6 is an installation view of the loading/unloading limit switch, and FIG. 7 is an electric circuit diagram. 2... Loading platform, 6... Partition gate, {8a... Left,
8b...Center, 8c...Right} Conveyor belt, {9a
...Left, 9b...Center, 9c...Right} Drive chain, {10a...Left, 10b...Center, 10c...
...Right} Fixture, 55... Carrying limit switch,
56... Switch operation piece, 57... Unloading limit switch.

Claims (1)

[Scope of utility model registration request] A plurality of conveyor belts 8a, 8b,
A plurality of drive chains 9a each connected to 8c,
9b, 9c are stretched, and each of the above-mentioned belts 8a, 8
b, 8c and one end of each chain 9a, 9b, 9c are connected with each fixing device 10a, 10b, 10c, respectively, and each chain 9a is connected via each sprocket 13a, 13b, 13c provided on the transmission shaft 12 at the loading end of the loading platform 2. , 9b, 9c intermediate portions are bent, and loading platform 2
Each belt pulley 14a, 14b provided at the discharge end,
14c, the middle of each belt 8a, 8b, 8c is bent, and the other end of each belt 8a, 8b, 8c and each chain 9a, 9b, 9c is endlessly attached to a gate base 7 having a partition gate 6 at the top. A vertical frame 25 connected in the direction of movement of each belt 8a, 8b, 8c... Each belt 8 is connected to the upper surface of the frame 25.
In the structure in which the conveyance sides of belts 8a, 8b, and 8c are brought into sliding contact, the carry-in limit switch 55 for detecting the carry-in end position of each belt 8a, 8b, and 8c is placed on the approximately central upper surface of the chain tension bearing chassis 11 at the front inside the loading platform 2. A switch operation piece 56 is provided at the center of the back surface of the gate base 7, and an unloading limit switch 57 for detecting the unloading end position of each of the belts 8a, 8b, 8c is installed on the central belt 8b. The central belt 8b and the central chain 9b are provided on one side of the vertical frame 25 at the carry-in end of the
A cargo loading/unloading device for a freight vehicle, characterized in that the switch 57 is brought into contact with a substantially central position of a central fixture 10b.