JP2007269272A - Device for automatically opening cargo bed front door of powered conveying vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for automatically opening a cargo bed front door of a powered conveying vehicle in which the distance between a traveling road surface and a floor plate of a cargo bed is smaller than the height of a front door of the cargo bed; the front door is turned around a rotary shaft during the dumping operation of the cargo bed to form a discharge port between its lower end and an end of the inclined floor plate; the dumping angle is large; the opening angle of the front door is large; and a load such as a compost is discharged without leaving anything behind. <P>SOLUTION: This device comprises a slide pin 8 protruded aside and fixed to a body frame part 5 of a powered conveying vehicle, and a guide connection member having a long hole 10 sliding in the longitudinal direction of the powered conveying vehicle while being guided by the slide pin 8 on one end side and with the other end side being turnably connected to a mounting arm 12 protruded upward of a rotary shaft 4 of a front door 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a loading platform door opening device for a power transport vehicle that can discharge without leaving a load such as compost loaded on a floor plate of a load platform of the power transport vehicle.

As this type of conventional technology, for example, a front door of a load carrier in a power vehicle is detachably attached to a discharge port formed on a front surface of a side plate and a floor plate of the load carrier. 2. Description of the Related Art There is known a dump carrier device (for example, Patent Document 1) for a power carrier in which a side plate is provided with a holder that removes and holds a front door.

As shown in FIG. 15, conventionally, in the power vehicle A, when a large amount of compost or the like is loaded, it is necessary to increase the height of the side plate 7 and the front door 3. In this case, the side plate When 7 and the front door 3 become high, the height from the traveling road surface G will become high, and loading workability | operativity, such as compost with a scoop, will worsen.
For this reason, in order to improve the loading workability, it is necessary to lower the height of the floor plate 2 with respect to the traveling road surface G. In this case, when the loading platform 1 is dumped, it is provided at the lower end of the front door 3. Since the locked metal fitting 30 and the traveling road surface G interfere with each other, only the power vehicle A having a small dump angle can be manufactured.
Japanese Utility Model Publication No. 5-46673

In the dump carrier platform device of the power vehicle of Patent Document 1 as described above, when dumping the carrier platform and discharging a large amount of luggage, removing the front door and placing it on the traveling road surface may interfere with the operation. For this reason, the front door is removed from the discharge port of the loading platform by a human hand and is mounted and held on a holding tool provided on the side plate, but this is troublesome.

15, the distance between the traveling road surface G and the floor plate 2 of the loading platform 1 is shorter than the height of the front door 3 of the loading platform 1, and the front door 3 does not move when the loading platform 1 is dumped. In the type that rotates around the rotating shaft 4 and forms a discharge port between the lower end of the rotating shaft 4 and the end of the inclined floor plate 2, the lock fitting 30 provided at the lower end of the front door 3 and the traveling road surface G are provided. , The dump angle could not be increased to about 60 degrees. Accordingly, there has been a problem in that it cannot be discharged without leaving a load such as compost loaded on the floor plate 2 of the loading platform 1.

Further, the front door 3 pivots and opens and closes by the action of the lock claw device on the back surface of the loading platform 1 and the gravity of the front door 3. In this case, the front door 3 is tilted uphill where the front door 3 is above the slope. When the front door 3 is opened, since the gravity of the front door 3 works even if the lock claw 30 is removed by increasing the dump angle, the front door 3 is placed on the front surface of the side plate 7 of the loading platform 1. There was a problem that the front door 3 was in the way and the workability was poor in order to discharge compost etc. without opening it in contact.

The present invention has been made in view of the above circumstances and problems, the distance between the traveling road surface and the floor of the loading platform is shorter than the height of the front door of the loading platform, and when the loading platform is dumped Even in the type where the front door rotates around the rotation axis and a discharge port is formed between the lower end of the front door and the end of the inclined floor plate, the dump angle is large and the opening angle of the front door is large. An object of the present invention is to provide a loading platform door opening device for a power vehicle that discharges without leaving a load such as compost loaded on the floor plate of the loading platform.

In order to achieve the above object, the invention according to claim 1 is such that the distance between the traveling road surface and the floor of the loading platform is shorter than the height of the front door of the loading platform, and the front door has a rotating shaft at the time of dumping the loading platform. In a power carrier door opening device that rotates to the center and forms a discharge port between its lower end and the end of the inclined floor plate, it projects to the side of the main body frame of the power carrier. And a slide pin that is fixed to the front end and a long hole that slides in the front-rear direction of the power vehicle while being guided by the slide pin, and the other end projects upward from the rotating shaft of the front door. A guide connecting member rotatably connected to the arm.

  According to a second aspect of the present invention, the guide connecting member is adjustable in length.

According to a third aspect of the present invention, the connection between the rotating shaft of the front door and the other end side of the guide connecting member is detachable.

According to the first aspect of the present invention, since the front door is pulled up by the guide connecting member connected to the rotation shaft of the front door and the front door is sufficiently opened, the dump angle can be increased. The lower end of the front door does not interfere with the road surface and can be discharged without leaving compost and the like, and the workability is good.
In addition, the guide connecting member that pulls up the front door is connected to the mounting arm above the rotating shaft of the front door of the loading platform, and thus automatically opens the front door in conjunction with the dumping operation above and below the loading platform. be able to.

According to the invention of claim 2, the opening angle of the front door can be adjusted by adjusting the length of the guide connecting member.

  According to the invention of claim 3, when the guide connecting member is made detachable from the mounting arm provided above the rotating shaft of the front door, when it interferes with the loading operation, the guide connecting member temporarily Can be removed from the rotating shaft of the front door.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
First, the outline | summary of the loading platform front door automatic opening apparatus of the power carrier A which concerns on this embodiment is demonstrated using FIG.1 and FIG.2.
The power carrier A according to the present embodiment is a crawler type push-walk type, for example, a hydraulic dump truck with a dump angle of 85 degrees, and the distance between the traveling road surface G and the floor board 2 of the truck 1 is in front of the truck 1. A lower floor loading platform shorter than the height of the front door 3, and the front door 3 rotates around the rotation axis 4 with respect to the floor plate 2 of the loading platform 1 when dumping the loading platform 1, A discharge port is formed between the two.

As shown in FIGS. 1 and 2, the loading platform 1 is installed on the frame portion 5 so as to be dumpable, and crawlers 6 are provided on both sides of the frame portion 5. A slide pin 8 is fixed so as to protrude laterally at the main body frame portion 5 at the lower rear side of the side plate 7 of the loading platform 1. The guide connecting member 9 is installed so as to be movable up and down along the side plate 7 and has a long hole 10 from the rear side to the center of the power vehicle A. The long hole 10 is fitted into the slide pin 8 so as to be slidable in the front-rear direction of the power vehicle A. As clearly shown in the enlarged view of FIG. 8, the both sides of the screw portion 11a fitted into the long hole 10 of the guide connecting member 9 are sandwiched between the guide connecting member 9 and the central portion of the power vehicle A with screws 11b. Thus, the length adjusting portion 11 that adjusts the length of the screw portion 11a in the front-rear direction of the power vehicle A is provided. A mounting arm 12 is provided so as to protrude above the rotary shaft 4 at the upper part of the front door 3 of the loading platform 1, and the mounting arm 12 has a front side of the power carrier A of the guide connecting member 9. One end of each is detachably connected. As a result, the dump lever 13 is operated to dump the loading platform 1, and in conjunction with this, the front door 3 rotates upward about the rotation shaft 4, and between the lower end of the front door 3 and the floor board 2. An outlet is formed on the top.

Next, the configuration and operation for detaching the guide connecting member 9 from the mounting arm 12 will be described with reference to FIGS.
As shown in FIGS. 3 to 5, the mounting arm 12 is provided so as to protrude above the rotation shaft 4 of the front door 3, and the arm portion 14 and the attachment / detachment provided on the upper portion of the arm portion 14 are provided. It consists of pins 15. The attachment / detachment pin 15 includes a rotation pin 15b that is rotatable on a support portion 15a provided perpendicularly to the arm portion 14, and the support portion 15a is provided with an end 16 on the front side of the power carrier A of the guide connecting member 9. By inserting the formed hole 17 and rotating and locking the rotation pin 15b, it can be connected or removed.

As described above, the guide connecting member 9 can be easily detached from the mounting arm 12 provided above the rotating shaft 4 of the front door 3. Can be removed to increase work efficiency.

Next, the operation of the slide pin 8 sliding through the long hole 10 of the guide connecting member 9 will be described with reference to FIGS.
In FIG. 6, the loading platform 1 has not yet been dumped, and the slide pin 8 is substantially at the center of the long hole 10 of the guide connecting member 9. In FIG. 7, the loading platform 1 starts dumping, and the slide pin 8 gradually slides behind the power carrier A in the long hole 10 of the guide connecting member 9. At this time, the loading platform 1 is rotatably supported by the hydraulic cylinder 18. In FIG. 8, the slide pin 8 comes into contact with the rearmost end of the power carrier A in the long hole 10 of the guide connecting member 9, and the front door 3 starts to be opened as will be described later with reference to FIG. 9.

Here, as shown in the enlarged view of FIG. 8, in the central portion of the guide connecting member 9, there are a screw portion 11 a fitted in the long hole 10 of the guide connecting member 9, the inside of the long hole 10, and the outside of the long hole 10. And a length adjusting portion 11 including a pair of screws 11b sandwiching the screw portion 11a. The length of the guide connecting member 9 is fixed by loosening the screw 11b, adjusting the length of the screw portion 11a in the front-rear direction of the power vehicle A, and tightening the screw 11b with a desired length. Thus, the opening angle of the front door 3 is adjusted by changing the length of the guide connecting member 9.
That is, if the length of the guide connecting member 9 is shortened, the opening angle of the front door 3 is increased. Further, the length of the guide connecting member 9 is adjusted according to the timing of the timing of disengagement of the lock claw link rod 22 to be described later from the frame portion 5 with reference to FIG.

As described above, the guide connecting member 9 connected to the upper side of the rotating shaft 4 of the front door 3 slides the slide pin 8 in conjunction with the dumping operation of the loading platform 1. Thus, the front door 3 can be automatically opened, and workability can be improved.

Further, the workability can be further improved by adjusting the opening angle of the front door 3 by adjusting the length of the guide connecting member 9.

Next, an operation for automatically fully opening the front door 3 with the guide connecting member 9 will be described with reference to FIGS. 9 and 10.
In FIG. 9, the loading platform 1 is rotatably attached to the loading platform support portion 20 around the dump fulcrum 19 of the frame portion 5, and dumps while being supported rotatably by the hydraulic cylinder 18. In conjunction with the dumping operation of the loading platform 1, when the slide pin 8 comes into contact with the rearmost end of the power carrier A of the guide connecting member 9, the front door 3 automatically starts to open. As the loading platform 1 dumps, the guide connecting member 9 is subjected to a force pulled to the front of the power vehicle A. However, since the guide connecting member 9 is locked at the end of the slide pin 8, The guide connecting portion 9 has a strong force to push the power carrier A rearward. Accordingly, since the mounting arm 12 is strongly pulled to the rear of the power carrier A, the rotating shaft 4 connected and fixed to the mounting arm 12 rotates, and the front door 3 fixed to the rotating shaft 4 is circular. It is lifted upwards and drawn open.
In FIG. 10, the dump angle is further increased, and dumping is performed up to 85 degrees in this embodiment. At this time, the front door 3 is further opened when the force of the guide connecting member 9 stretching toward the rear of the power vehicle A is sufficiently exerted, so that the lock fitting 30 provided on the front door 3 travels. There is no interference with the road surface G.

In this way, the front door 3 is automatically fully opened by pulling the front door 3 around the rotation shaft 4 of the front door 3 with the guide connecting member 9. Even on the traveling road surface G of the uphill slope where the part door 3 is above the hill, there is no problem that the lock fitting 30 provided on the front door 3 interferes with the traveling road surface G, and the discharge workability is good. .

Next, the opening mechanism of the front door 3 provided on the back surface 31 of the loading platform 1 will be described with reference to FIGS. 11 to 14.
The operation of increasing the dump angle in order is shown according to FIGS.
11 and 12, the loading platform 1 is rotatably supported by the loading platform support portion 20 around the dump fulcrum 19 of the frame portion 5. The hydraulic cylinder 18 is supported by a cylinder fulcrum 21 so that the loading platform 1 can be dumped. The upper end of the lock claw link bar 22 is rotatably connected to the lock claw link bar rotation fulcrum 23. While the dump angle is small and the distance between the loading platform 1 and the frame portion 5 is short, the lower end of the lock claw link bar 22 is in front of the power carrier A because of the rotation position of the lock claw link bar rotation fulcrum 23. It is in contact with the frame portion 5 in a tilted state. The lock claw link rod rotation fulcrum 23, which is the other end of the lock claw link rod rotation fulcrum 23, rotates in conjunction with the rotation of the lock claw link rod 22 and is connected to one end of the lock claw link rod 25. The other end of the lock claw connecting rod 25 is rotatably connected to the lower end of the lock claw link 26. One end of a lock claw connection rod adjustment spring 27 is connected to the center of the lock claw connection rod 25, and the other end of the lock claw connection rod adjustment spring 27 is connected to the lower end of the loading platform 1. As shown in FIG. 13, the right side of the upper end of the lock claw link 26 is rotatably connected to one end of the lock claw rotation fulcrum 28, and the other end of the lock claw rotation fulcrum 28 is connected to the back surface 31 of the loading platform 1. Yes. The tip of the upper end of the lock claw link 26 is also connected to a pair of lock claw 29 provided at the lower end of the front door 3 through a hole provided at the lower end of the front door 3 of the loading platform 1. At the lower end of the front door 3 of the loading platform 1, the pair of lock claws 29 are locked in a state of being fitted into the lock fitting 30.

As shown in FIGS. 13 and 14, when the dump angle is increased and the distance between the loading platform 1 and the frame portion 5 is increased, the lock claw link rod 22 is inclined at the lower end of the power carrier A. As a result of the reaction from the contact state, the power carrier A rotates toward the rear, and the lower end of the lock claw link rod 22 is detached from the frame portion 5. As the lock claw link bar 22 rotates, the lock claw link bar rotation fulcrum 23 connected to the upper end of the lock claw link bar 22 rotates rearward of the power carrier A and the lock claw link bar rotates. The lock claw connecting rod rotation fulcrum 24 which is the other end of the fulcrum 23 rotates in front of the power vehicle A.
As a result, the lock claw connection rod 25 having one end connected to the lock claw connection rod rotation fulcrum 24 moves to the front of the power carrier A with the lock claw connection rod rotation fulcrum 24 as a starting point. Further, as the lock claw connecting rod 25 moves, the lock claw connecting rod adjusting spring 27 connected to the center of the lock claw connecting rod 25 also applies a force toward the front of the power carrier A so as to promote the movement of the lock claw connecting rod 25. Will occur.
Therefore, the lower end of the lock claw link 26 connected to the other end of the lock claw connecting rod 25 is rotated forward of the power carrier A around the lock claw rotation fulcrum 28 connected to the back surface 31 of the loading platform 1. At the same time, the upper end of the lock claw link 26 connected to the lock claw rotation fulcrum 28 rotates rearward of the power carrier A.
Therefore, the pair of lock claws 29 connected to the tip of the upper end of the lock claw link 26 through the hole of the front door 3 of the loading platform 1 and provided on the surface of the front door 3 of the loading platform 1 try to go up. The lock claw 29 is detached from the pair of lock fittings 30, and the front door 3 is rotatable in the opening direction.

Hereinafter, the operation of reducing the dump angle of the loading platform 1 will be described.
When the dumping angle is reduced and the front door 3 is closed, the pair of lock claws 29 provided at the lower end of the surface of the front door 3 of the loading platform 1 are again attached to the pair of lock fittings 30 by the weight of the front door 3. It is inserted. In conjunction with the movement of the lock claw 29, the upper end of the lock claw link 26 connected to the lock claw 29 is located in front of the power carrier A around the lock claw rotation fulcrum 28 provided on the back surface 31 of the loading platform 1. While rotating, the lower end of the lock claw link 26 rotates rearward of the power carrier A.
As a result, the lock claw connecting rod 25 having one end connected to the lower end of the lock claw link 26 moves to the rear of the power carrier A, and the lock claw connecting rod adjusting spring 27 connected to the center of the lock claw connecting rod 25 is also In order to promote the movement of the lock claw connecting rod 25, a force toward the rear of the power carrier A is generated.
Therefore, the lock claw connection rod rotation fulcrum 24 connected to the other end of the lock claw connection rod 25 rotates rearward of the power carrier A and the lock claw link which is the other end of the lock claw connection rod rotation fulcrum 24. The rod rotation fulcrum 23 rotates in front of the power vehicle A.
Here, the lock claw link bar 22, which is detached from the main body frame portion 5 and whose upper end is connected to the lock claw link bar rotation fulcrum 23, is rotated by the lock claw link bar rotation fulcrum 23. The link rod rotation fulcrum 23 is the center of rotation, and the power vehicle A is rotated forward, and the lower end thereof abuts against the main body frame 5 again. The hydraulic cylinder 18 contracts slowly, and the loading platform 1 is installed on the main body frame portion 5.

In this way, in conjunction with the dumping operation of the loading platform 1, the locking claw release mechanism of the back surface 31 of the loading platform 1 forcibly releases the locking claw 29 from the lock fitting 30 and the front door 3 starts to open. The front door 3 can be opened and closed without a problem that the lock fitting 30 of the front door 3 interferes with the traveling road surface G even on the traveling road surface G of the uphill slope where the front door 3 is above the hill.

According to this embodiment, the distance between the traveling road surface G and the floor plate 2 of the loading platform 1 is shorter than the height of the front door 3 of the loading platform 1, and the front door 3 is rotated by the rotating shaft 4 when the loading platform 1 is dumped. In the load carrier door opening device of the power carrier A that forms a discharge port between the lower end thereof and the inclined end portion of the floor board 2, the front door 3 has a large dump angle. Can be discharged without leaving a load of compost or the like loaded on the floor plate 2 of the loading platform. By operating one dump lever, the dumping operation can be performed in conjunction with the loading platform dump. The front door 3 can be automatically opened sufficiently with a time difference.

  As described above, the automatic loading device front door opening device for the power carrier A according to the present invention is loaded on the floor plate 2 of the loading platform by increasing the dump angle and increasing the opening angle of the front door 3. It is suitable for discharging without leaving a load such as compost.

The perspective view which shows the loading platform door open | release apparatus of the motive power vehicle which concerns on embodiment. The side view which shows the state in which the slide pin is being fixed to the main body frame part. The enlarged view of the arm part and attachment / detachment pin of an attachment arm. The perspective view which shows the state which connected the guide connection member to the attachment arm. The perspective view which shows the state which removed the guide connection member from the attachment arm. The side view which shows the state of the slide pin before dumping start. The side view which shows the state of the slide pin at the time of dumping start. The side view which shows the state which the slide pin contact | abutted to the rearmost end part of the back of the power carrier of the long hole of a guide connection member (enlarged view of the length adjustment part of the center part of a guide connection member). The side view which shows the operation | movement which a front part door begins to open. The side view which shows the operation | movement which fully fully opens a front door. The front view which shows a lock nail | claw release mechanism. The side view which shows a lock nail | claw opening | release mechanism. The rear view which shows a lock nail | claw opening | release mechanism. The rear view which shows a lock nail | claw opening | release mechanism. The side view which shows a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Loading platform 2 Floor board 3 Front door 4 Rotating shaft 5 Main body frame part 8 Slide pin 9 Guide connection member 10 Long hole 11 Length adjustment part 12 Mounting arm A Power carrier

Claims (3)

The distance between the traveling road surface and the floor plate of the loading platform is shorter than the height of the front door of the loading platform, and the front door rotates around the rotation axis at the time of dumping the loading platform, and the floor plate inclined with the lower end thereof In the automatic door opening device of the power carrier that forms a discharge port with the end of the
A slide pin that protrudes and is fixed to the side of the main body frame of the power carrier,
A long hole that slides in the front-rear direction of the power vehicle while being guided by the slide pin is provided on one end side, and the other end side is rotatably connected to a mounting arm that protrudes above the rotation axis of the front door. The automatic door opening device for the front of the loading platform of the power transport vehicle.   2. The automatic door opening mechanism for a power carrier according to claim 1, wherein the guide connecting member is adjustable in length. 3. The automatic loading door front door opening of the power transport vehicle according to claim 1, wherein the connection between the rotating shaft of the front door and the other end side of the guide connecting member is detachable. 4. apparatus.

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