JP2527028Y2 - Carrier - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention relates to a transport vehicle capable of always keeping a loading platform horizontal even if there is an inclined portion in a transport path, and capable of lifting and lowering the loading platform in a horizontal state.

[Conventional technology]

Conventionally, as means for transporting goods in factories and the like,
A carrier having a carrier is used, and in addition to a manned carrier, an unmanned carrier that is remotely operated or operated unmanned by a program is used.

In the conventional carrier, the carrier is fixedly provided on the carrier, and even if the height can be adjusted like a table lifter, the carrier is provided in parallel with the carrier, so there is an inclined portion in the carrier path. And the carrier tilts with the carriage, and there is a risk that the load may be lost or spilled. For this reason, it is necessary to take measures such as fixing the conveyed goods to the loading platform, reducing the load amount, and carefully performing traveling and transportation of the inclined portion. In particular, the influence is great for liquids and powders, and conveyed objects are placed in a closed container and conveyed, or lifted by a crane or the like and conveyed while being kept horizontal. Further, in an automatic guided vehicle developed in recent years, it is not possible to manage a conveyed object during conveyance, and thus it is not possible to cope with occurrence of a load collapse and a load spill.

In addition, it has been proposed that a jack is provided at the front or rear of the cart to support one end of the carrier and move the other end up and down to keep the carrier horizontal, but it is not possible to raise and lower the carrier in a horizontal state, In order to keep the truck level when tilted, it is usually necessary to keep the platform high,
In addition to an increase in the center of gravity, there is a problem that a stress is applied during the ascent and descent, and the ascent and descent cannot be performed smoothly.

[Problems to be solved by the invention]

The purpose of the present invention is to solve the above-mentioned problems, while keeping the transported product horizontal even if there is an inclined portion in the transport path,
In addition to being able to transport stably without causing collapse or spillage of the load, the platform can be raised and lowered in a horizontal state, and when lifting or lowering one of the platforms, the platform can rotate smoothly and the bending rod is not subjected to bending stress. To provide a transport vehicle.

[Means for solving the problem]

 The present invention is the next carrier.

(1) One set of jacks provided on the front left and right of the bogie, and one set of jacks provided on the rear right and left, a carrier supported by these jacks so as to be able to move up and down, and the front and rear jacks And a plurality of drive units provided to move up and down separately, detecting the inclination of the bogie or carrier during transport, raising only the jack on the lower side, keeping the carrier level with the center of gravity low, And, when loading and unloading, all the jacks are moved up and down in a state where the loading platform is kept horizontal, and a detection control device that sends a drive signal to the drive unit to raise and lower the loading platform in a horizontal state, Of the pair of jacks at the rear, one set of jacks is fixed to the bogie,
The other set of jacks is fixed to a supporting table which is swingably supported with respect to the bogie so as to absorb a difference caused by rotation of the loading platform.

(2) The carrier according to (1), wherein the jack is a screw-type jack.

In the present invention, jacks are typically provided at the front and rear portions of the bogie and driven separately, but in this case, the jacks are provided at the left and right sides of the front and rear portions to drive the left and right simultaneously,
Can be driven separately. Any type of jack can be used, such as a screw type, a rack and pinion type, or a hydraulic type, but the screw type is easy to control and can be fine-tuned, and can maintain horizontality when the engine stops. It is preferable because it is excellent.

[Action]

In the transport vehicle of the present invention, a transported object is loaded on a carrier supported by a jack and transported. When loading or unloading goods from the loading platform, each jack is driven by the same amount to raise and lower the loading platform in a horizontal state, and the height is adjusted to the loading or unloading path for loading or unloading. I do.

When transporting the transported article, each jack is lowered to keep the loading platform horizontal, and transport is performed. Then, when the transport vehicle approaches the inclined portion of the transport path, the bogie or the loading platform begins to gradually incline accordingly, so that the detection control device detects the tilt and raises the jack on the lower side, so as to respond. A drive signal is sent to the drive unit to drive the drive unit, thereby leveling the bed. The same control is carried out even if the cart is further inclined, and the carrier is kept horizontal. At this time, one set of jacks is fixed to the bogie, and one set of jacks is fixed to a supporting table swingably supported by the bogie, among the set of jacks provided at the front and rear portions. Therefore, the difference in the position of the carrier caused by the rotation of the carrier is absorbed by the swing of the support, and no bending stress is applied to the lifting rod, and the rotation of the carrier is performed smoothly and safely. As a result, the carrier is kept horizontal at a low position, and the conveyed goods on the carrier have a lower center of gravity, and are conveyed without causing collapse or spillage.

〔Example〕

 Hereinafter, the present invention will be described with reference to the drawings.

FIG. 1 is a side view of a transport vehicle of an embodiment, FIG. 2 is a side view showing a transport state by a flat transport path, FIG. 3 is a side view showing a transport state of an inclined portion, and FIG. Main part side view,
FIG. 5 is a view in the direction of arrow A in FIG. 4, and FIG. 6 is a view in the direction of arrow B in FIG.

In the figure, reference numeral 1 denotes a carrier, one set of jacks 3 provided on the left and right of the front part of the bogie 2 and another set of jacks 4 provided on the right and left of the rear part. The vehicle has a supported carrier 5 and a detection control device 6 that detects the inclination of the carrier 2 or the carrier 5 and sends a drive signal to the jacks 3 and 4 so as to maintain the carrier 5 horizontal. , And travel on the transport path 9 by the wheels 8.

The jacks 3 are of a screw type and are provided one on each of the left and right sides of the front of the bogie 2. A drive unit 11 fixed to the bogie 2 causes a lifting rod 12 made of a screw bar to move up and down. ing. The driving unit 11 is composed of a combination of a worm and a gear rotated by a motor 14, and is formed on the inner surface of the gear, so that the male screw of the lifting rod 12 meshes with the screw, and the rotation of the gear causes the lifting rod 12 to move up and down. , But details are omitted in the figure.

A spherical support portion 15 is provided at the upper end of the lifting rod 12 and engages with an engagement portion 17 formed below the support plate 16 to support the support plate 16 in point contact. The carrier 5 is rotatably attached to the support plate 16 by a hinge 18.

The jacks 4 are also of a screw type, and are provided one on each of the left and right sides of the rear part of the bogie 2. These jacks 4 are provided with a drive unit 23 fixed to a support base 22 having a trunnion structure which is swingably supported by pins 21 at the rear of the bogie 2 so that a lifting rod 24 formed of a screw rod moves up and down. I have. The drive unit 23 also has a configuration including a worm and a gear similarly to the drive unit 11, but is not illustrated in detail.

A motor 25 is provided at the center of the support base 22, and rotational force is distributed left and right in the bevel gear box 26,
The rotation is transmitted to the left and right drive units 23 via the rotation shaft 27, and the left and right lifting rods 24 are simultaneously moved up and down. A support portion 28 is provided at an upper end portion of the lifting rod 24, and the loading platform 5 is rotatably supported by a hinge 29.

The detection control device 6 is provided on the loading platform 5 so as to detect the inclination of the loading platform 5, and drives the motors 14 and 25 so as to maintain the loading platform 5 horizontal according to the detected inclination, and controls the jacks 3 and 4. A drive signal for moving up and down is sent.

In the carrier 1 having the above-described structure, the rotation of the motor 14 causes the worm and the gear in the drive unit 11 of the jack 3 to rotate, and the elevating rod 12 made of a male screw engaged with the female screw on the inner surface of the gear moves up and down. I do. The jacks 3 are provided one by one on the left and right, and are driven by different motors 14. These are simultaneously operated at the same speed.
In the case of the jack 4, by rotating the motor 25, the rotational force is distributed to the left and right rotation shafts 27 by the bevel gears in the bevel gear box 26, and the left and right drive units 23
The worm and gears inside rotate and the left and right lifting rods 24
Move up and down at the same speed.

When loading or unloading the load 7 to or from the carrier 5 of the transport vehicle 1, as shown in FIG. 1, the motors 14 and 25 are simultaneously driven by a program or manually to move all the lifting rods 12 and 24 to the same position. The load 7 is moved up by the same stroke at a high speed, and is raised while keeping the loading platform 5 horizontal to adjust the height of the carry-in path or the carry-out path to carry in or carry out the load 7.

When transporting the transported object 7 by the transport vehicle 1, the motor 1
4 and 25 are driven in the opposite directions to lower the lifting rods 12 and 24, and as shown in FIG.

As shown in FIG. 3, when the transport vehicle 1 approaches the transport path 9 uphill, the carrier 5 gradually starts to incline, and the detection control device 6 detects the incline and sends a drive signal to the motor 25 at the rear. Send. As a result, the motor 25 rotates to raise the lower lifting rod 24, raise the rear side of the carrier 5 by an angle θ corresponding to the inclination angle θ of the transport path 9, and keep the carrier 5 horizontal. At this time, as shown in FIG. 4, the loading platform 5 rotates to the position 5a with the hinge 18 as a fulcrum, but the difference d caused by the rotation is absorbed by the swing of the support platform 22 with the pin 21 as a fulcrum. , No bending stress is applied to the lifting rod 24,
The rotation of the loading platform is performed safely and smoothly.

When the transport vehicle 1 has gone up the transport path 9 on an uphill, the inclination is no longer present, so the detection control device 6 detects this and sends a drive signal, the motor 25 rotates in reverse, the lifting rod 24 descends, and the loading platform 5 Return to horizontal.

When the transport vehicle 1 approaches the transport path 9 on the downhill, a drive signal is output by the detection of the detection control device 6, the front left and right motors 14 rotate, and the lower lifting rod 12 rises, thereby The front side of 5 rises to keep the bed 5 horizontal. At this time, the carrier 5 rotates about the hinge 29 as a fulcrum. The difference d generated by the rotation is absorbed by the swing of the support 22. When the downhill transport path 9 is completed, the operation returns to the original state by the reverse operation.

By the above operation, the loading platform 5 travels on the transport path 9 while always maintaining a horizontal state at a low position, and the transported object 7 is transported with a low center of gravity.

In the above embodiment, the front left and right jacks 3 are driven by separate motors 14.
In the same manner as described above, it may be driven by one motor. Further, the rear left and right jacks 4 are driven by one motor 25, but may be driven by another motor. Further, in the above-described embodiment, the left and right jacks 3 and 4 are simultaneously operated on both the front and rear portions so as to correspond to only the front-back inclination, but the detection control device 6 detects the left-right inclination,
The left and right jacks 3, 4 can be individually controlled to cope with left and right inclinations.

The jacks 3 and 4 may be of a screw type, a rack and pinion type, a hydraulic type, or the like, but are preferably of a screw type.
Further, the support mechanism of the jacks 3 and 4 or the carrier 5 is not limited to the embodiment and can be changed. The detection control device 6 may control the jacks 3 and 4 by detecting the inclination of the cart 2.

[Effect of the invention]

According to the present invention, a set of jacks is provided at the front and rear of the truck to support the carrier, and one jack is supported by a swingable support and moved up and down by another drive unit, and the truck or the carrier is moved. The jack on the lower side is raised according to the inclination of the lower part, and the whole can be raised and lowered in a horizontal state, so even if there is an inclined part in the transport path, the transported object is kept horizontal at a low position, In addition to being able to transport stably without causing collapse or spillage of the load, the load can be moved up and down in a horizontal state to carry in and out the goods at any position, and even liquids and powders can be transported safely. . Further, the difference in position caused by the rotation of the carrier is smoothly absorbed by the swing of the support, and no bending stress is applied to the lifting rod, so that the carrier can be safely and smoothly rotated.

[Brief description of the drawings]

FIG. 1 is a side view of the carrier of the embodiment, FIG. 2 is a side view showing a carrying state by a flat carrying path, FIG. 3 is a side view showing a carrying state of an inclined portion, and FIG. FIG. 5 is a side view in the direction of arrow A in FIG. 4, and FIG. 6 is a view in the direction of arrow B in FIG. In the drawings, the same reference numerals indicate the same or corresponding parts, 2 is a truck, 3 and 4 are jacks, 5 is a loading platform, 6 is a detection control device,
7 is a conveyed product, 11 and 23 are driving parts, 12 and 24 are lifting rods, 1
4, 25 are motors, 18, 29 are hinges, 21 is pins, 22 is a support, and 26 is a bevel gear box.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-127882 (JP, A) JP-A-51-111831 (JP, U) JP-A-61-175035 (JP, U)

Claims (2)

(57) [Scope of request for utility model registration] 1. A set of jacks provided on the front left and right sides of a truck, a set of jacks provided on the rear left and right sides, a loading platform supported by these jacks so as to be able to ascend and descend, and the front and rear parts And a plurality of drive units provided to move the jacks up and down separately.Detects the inclination of the bogie or carrier during transport, raises only the jack on the lower side, and keeps the carrier level with the center of gravity low. And a detection control device that sends a drive signal to the drive unit to move all jacks up and down while keeping the loading platform horizontal during loading and unloading, and to lift and lower the loading platform in a horizontal state. Of the pair of jacks, one for the part and one for the rear,
One set of jacks is fixed to the bogie, and the other set of jacks is fixed to a support base that is swingably supported with respect to the bogie so as to absorb the difference caused by the rotation of the carrier. A transport vehicle characterized by that: 2. The carrier according to claim 1, wherein the jack is a screw-type jack.