JP2014201211A - Movable carriage and transport device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movable carriage and a transport device that smoothly conduct transfer operation of a load even under unfavorable conditions of the ground, for example, when the ground has a slight degree of unevenness and bumps or when the ground is soft.SOLUTION: A movable carriage 4 is obtained by: mounting sprocket wheels 14 and 18 respectively to a carriage body 5 carrying a load 2, in a horizontal direction in the front and the rear at a prescribed interval between shafts; winding and mounting an annular roller chain 19 onto the sprocket wheels 14 and 18; and attaching a track plate 25 having a plate surface contacting the ground G, on a ground contact surface side of each link in the roller chain 19. A transport device 1 is obtained by: constituting a transport carriage 3 in which a rotation drive device 33 for rotation driving the sprocket wheel 18 is disposed on the movable carriage 4; mounting the transport carriage 3 one by one correspondingly onto both front side corner parts of the load 2 respectively; and mounting the movable carriage 4 one by one correspondingly onto both rear side corner parts of the load 2 respectively.

Description

  The present invention relates to a moving carriage and a transfer device used for moving a load, and more particularly to a moving carriage and a transfer device suitable for use in transferring and installing a heavy object.

As a conventional movable carriage, a carriage body on which a load is placed has been proposed in which a predetermined roller is disposed at a predetermined distance in the horizontal direction (see, for example, Patent Document 1).
Patent Document 1 describes a method in which the movable carriage is laid on the four corners of the luggage and the luggage is moved using the four movable carriages.

Registered Utility Model No. 3051835

  However, in the above moving carriage, the rotation of the roller is prevented only by a slight unevenness or a step on the ground, or when the ground is soft because the ground contact pressure of the roller against the ground is large, the roller sinks into the ground. There is a problem that it is difficult to move the luggage on the ground under such bad conditions.

  In view of the above-described problems of the prior art, the present invention provides a movement that can smoothly move a load even on an unfavorable ground such as a slight unevenness or a step on the ground or a soft ground. It aims at providing a trolley | bogie and a conveying apparatus.

  In order to achieve the above object, a mobile carriage according to a first aspect of the present invention is a mobile carriage that is laid under a load and moves the load, and is separated from the main body of the load by a predetermined axial distance in the horizontal direction. A first wheel and a second wheel are respectively arranged, and a chain formed by connecting a plurality of links in an annular shape is wound around these wheels and attached, and a shoe plate having a plate surface in contact with the ground is attached to each link. It is attached to the ground side.

  In this case, a chain guide having an engagement portion that engages with the non-grounding surface side of the lower portion of the chain between the first wheel and the second wheel is provided, and the engagement portion of the chain guide is It is preferable to have a shape having a convex bulge downward (second invention).

  Next, a transport device according to a third aspect of the present invention provides a transport cart by providing a rotary drive device that rotationally drives the first wheel or the second wheel in the mobile cart according to the first or second invention. It is characterized in that at least one transport cart is provided corresponding to each of the left side portion and the right side portion of the luggage.

According to the mobile carriage of the first invention, when traveling on the ground with slight irregularities and steps, an endless track formed by a crawler belt composed of a crawler plate and a chain is laid on the irregularities and steps on the ground. Therefore, the rotational movement of each wheel is performed on the endless track, and the rotation of each wheel is not hindered by the unevenness or level difference of the ground, and the movement operation of the load can be performed smoothly.
In addition, since the load of the load is transmitted to the ground via the crawler plate between the first wheel and the second wheel, the ground pressure against the ground can be reduced, and even if the ground is soft, the crawler belt is on the ground. It is possible to prevent intrusion and to smoothly move the luggage.

  According to the movable carriage of the second invention, the crawler belt bulges downward between the first wheel and the second wheel due to the swelling of the engaging portion of the chain guide, so that the crawler belt is linearly grounded with respect to the ground. Thus, each operation of steering and turning of the movable carriage can be easily performed.

In the transfer device according to the third aspect of the present invention, at least one transfer trolley configured by providing a rotational drive device for the wheel on the movable trolley is disposed corresponding to each of the left side portion and the right side portion of the load. By controlling the peripheral speed of each crawler track of the carriage, each of straight movement, steering and turning operations is performed.
That is, by making the circumferential speeds of the crawler belts in the left and right transport carts the same, the transport device moves straight. Further, by providing a difference in the circumferential speed of the crawler belts between the left and right transport carts, the steering operation of the transport device is performed according to the difference. Further, the crawlers in the left and right transport carts are rotated in opposite directions to rotate the transport device.
According to the transport apparatus of the third invention, since the transport cart configured to be self-propelled based on the mobile cart according to the first or second invention is combined, there are some unevenness and steps on the ground. Even if the above-mentioned straight-ahead, steering, and turning operations are performed on the ground under adverse conditions such as the ground is soft, the rotation of each wheel is not hindered by unevenness or steps on the ground, and The crawler belt does not sink into the ground, and the cargo can be transported smoothly.

1 is an overall perspective view of a transport device according to an embodiment of the present invention. 1 is an overall perspective view of a mobile carriage according to an embodiment of the present invention. It is the sectional view on the AA (BB) line of FIG. It is CC sectional view taken on the line of FIG. It is a whole perspective view of the conveyance trolley of this embodiment. It is the DD sectional view taken on the line of FIG.

  Next, embodiments of the movable carriage and the transfer device of the present invention will be described with reference to the drawings.

<Overview of the conveying device>
A transport apparatus 1 shown in FIG. 1 includes transport carts 3 and 3 that are laid on the front left and right corners of the load 2, and mobile carts 4 and 4 that are laid on the rear left and right corners of the load 2, respectively. Has been.

<Description of moving cart>
As shown in FIG. 2, the movable carriage 4 includes a carriage body 5.
The cart body 5 includes an upper plate 6 having a placement surface on which the luggage 2 is placed, and the front plate 7, the rear plate 7, and the rear plate 6 correspond to the front end, rear end, left side, and right side of the upper plate 6, respectively. The side plate 8, the left side plate 9, and the right side plate 10 are disposed so as to be positioned below the upper plate 6, and the upper plate 6 and the side plates 7 to 10 are fastened with required bolts (not shown). The side plates 7, 9; 7, 10; 8, 9; 8, 10 that are adjacent to each other are also fastened with necessary bolts (not shown) to form a strong box structure.
In addition, although illustration description is abbreviate | omitted, in order to fasten the load 2 and the mobile trolley 4 which loaded the load 2 and to prevent the load 2 from slipping off from the mobile trolley 4, the nut fixed to the upper plate 6 and its It is preferable to provide a fastening fixture comprising a bolt that is screwed onto the nut (the same applies to the transport carriage 3).

A front shaft 11 and a rear shaft 12 are disposed between the front side plate 7 and the rear side plate 8 with a predetermined inter-axis distance in the horizontal direction.
Both ends of the front shaft 11 are non-rotatably supported by the left side plate 9 and the right side plate 10 by shaft fixing means 13 such as a key plate, for example, and both ends of the rear shaft 12 are similarly fixed to the shaft fixing means 13. Therefore, the left side plate 9 and the right side plate 10 are supported so as not to rotate.

<Description of sprocket>
As shown in FIG. 3, a pair of sprockets 14, 14 are mounted on the front shaft 11 at a predetermined interval in the axial direction, and both sprockets are used to regulate the interval between the sprockets 14, 14. The half collar 15 is externally fitted so as to be positioned between the fourteen and fourteen.
A bearing 16 such as a bush is inserted between the sprocket 14 and the front shaft 11, and the sprocket 14 is rotatably supported with respect to the front shaft 11.
A thrust bearing 17 with a spherical seat is inserted between the sprocket 14 and the left and right side plates 9, 10, and a thrust load acting from the sprocket 14 toward the left and right side plates 9, 10 by the thrust bearing 17. Can be received without obstructing the rotational movement of the sprocket 14.

The peripheral structure of the rear shaft 12 is basically the same as that of the front shaft 11. For this reason, except for distinguishing the sprocket 14 on the front shaft 11 as the sprocket 18 on the rear shaft 12, redundant description will be omitted with the aid of FIG. 3.
In addition, since the movable carriage 4 has a symmetrical structure with respect to the center line of the carriage 4, the following description will mainly focus on the structure of the left half of the movable carriage 4. It is assumed that the structure of the right half of the movable carriage 4 has been explained with explanation.

<Description of roller chain>
As shown in FIG. 4, a roller chain 19 formed by connecting a plurality of links in a ring shape is wound around the sprocket 14 and the sprocket 18.
As shown in FIG. 3, in the roller chain 19, one unit link is mainly composed of a pair of left and right inner link plates 20 and 20, a pair of left and right outer link plates 21 and 21, a roller 22, a bush 23, and a pin 24. And a pair of inner link plates 20 and 20 and a pair of outer link plates 21 and 21 are arranged so that their ends overlap each other, and a cylindrical roller 22 is arranged in this overlapping portion, Both ends of a cylindrical bush 23 penetrating the center of the roller 22 are press-fitted into the pair of inner link plates 20, 20, and both ends of a pin 24 penetrating the roller 22 and the bush 23 are paired with the pair of outer link plates 21. , 21 and press-fitting.
The roller 22 is freely rotatable with respect to the bush 23 and the inner link plates 20, 20, and the bush 23 and the inner link plate 20 are freely rotatable with respect to the outer link plate 21 and the pin 24.

<Description of footwear>
As shown in FIG. 4, a footplate mounting plate 20 a is integrally connected to an edge portion on the grounding surface side of the inner link plate 20 so as to project horizontally outward, and the outer link plate 21 is in contact with the outer link plate 21. Similarly, a footwear mounting plate 21a is integrally connected to the ground side edge portion, and each footwear mounting plate 20a, 21a has a belt-like plate surface that is narrow in the front-rear direction and wide in the left-right direction. The plate 25 is fixed by fasteners 26 such as bolts and nuts.

<Description of crawler belt>
In the present embodiment, an endless crawler belt 27 is constituted by the roller chain 19 and the crawler plate 25 fastened to each link in the roller chain 19, and an endless track is laid on the ground G by the crawler belt 27. be able to.

<Description of chain guide>
A chain guide 28 is fixed to the left side plate 9 by fixing means 29 such as a bolt.
The chain guide 28 includes a first engagement portion 28a that engages with the non-grounding surface of the upper portion of the roller chain 19 in the central section between the front and rear sprockets 14 and 18, and a lower portion of the roller chain 19 in the same section. It is comprised by the plate-shaped member which has the 2nd engaging part 28b engaged with the non-grounding surface side.
Note that both side portions of the chain guide 28 are notched in an arc shape in order to avoid interference with the front and rear sprockets 14 and 18.

The first engaging portion 28a is shaped so as to extend flat and straight between the front and rear sprockets 14, 18, so that the roller chain 19 does not meander left and right while simultaneously contacting the plurality of rollers 22 in the roller chain 19. It serves to guide the movement in the longitudinal direction.
The second engaging portion 28b is shaped to have a convex arcuate shape (which may be trapezoidal or the like) between the front and rear sprockets 14 and 18, and has the same guidance as the first engaging portion 28a. It has a function and serves to bulge the crawler belt 27 downward.

<Description of transport cart>
Next, the transport cart 3 will be described with reference to FIGS. 5 and 6.
In addition, since the conveyance trolley | bogie 3 is comprised on the basis of the mobile trolley | bogie 4, about the same or similar thing as the mobile trolley | bogie 4, only the same code | symbol is attached | subjected to a figure and the detailed description is abbreviate | omitted. In the following, the description will focus on the points that are different from the moving carriage 4.

As shown in FIG. 6, the rear shaft 30 is rotatably supported by the left side plate 9 and the right side plate 10 by bearings 31 such as bushes, for example, and one end side of the rear shaft 30 is outside the right side plate 10. It is protruding.
A key 32 for torque transmission is inserted between the rear shaft 30 and each sprocket 18 attached to the rear shaft 30, and the rotational power input from one end side of the rear shaft 30 is the key 32. The rear shaft 30 and the sprocket 18 are integrally rotated together.
As shown in FIG. 5, the cart body 5 is equipped with a rotation drive device 33. The rotational drive device 33 is configured by attaching a reduction gear 34 to the right side plate 10 so that rotational power can be transmitted to one end portion of the rear shaft 30, and an electric motor 35 attached to the reduction gear 34 so that rotational power can be transmitted. By the operation of the electric motor 35, the rotational power from the electric motor 35 can be transmitted to the sprocket 18 via the speed reducer 34, the rear shaft 30 and the key 32 (see FIG. 6), and the sprocket 18 can be driven to rotate. It is like that.

As shown in FIG. 5, a rod-like handle 36 is attached to the front side plate 7 so as to protrude forward, and an operation box 37 is attached to the tip of the handle 36.
The operation speed of the electric motor 35 can be controlled by operating the operation unit 37a such as a lever or a switch provided in the operation box 37, and the forward / backward movement of the transport carriage 3 can be switched or the travel speed can be adjusted. It can be done. Further, the conveyance carriage 3 can be steered by operating the handle 36 in the right direction or the left direction while moving the conveyance carriage 3 forward or backward.

<Effect>
In the transport apparatus 1 configured as described above, as shown in FIGS. 1, 2, and 5, the crawler belts 27, 27 of the left and right transport carts 3, 3 at the front side corners of the luggage 2, respectively. By controlling the peripheral speed, it is possible to perform straight movement, steering and turning operations.
That is, by making the peripheral speeds of the crawler belts 27 and 27 in the left and right transport carts 3 and 3 the same, the straight movement operation of the transport device 1 can be performed. Further, by providing a difference in the peripheral speeds of the crawler belts 27 and 27 in the left and right transport carts 3 and 3, the steering operation of the transport device 1 can be performed according to the difference. In addition, the crawlers 27 and 27 in the left and right transport carts 3 and 3 can be rotated in the opposite directions to rotate the transport device 1.
Note that the left and right movable carriages 4, 4 at both rear corners of the luggage 2 are driven by the carriages 3, 3.

When the transport carriage 3 and the moving carriage 4 travel on the ground G having some unevenness and steps, an endless track formed by the crawler belt 27 shown in FIG. 4 is laid on the unevenness and steps of the ground G. For this reason, the rotational movement of each sprocket 14 and 18 is performed on the endless track, and the rotation of each sprocket 14 and 18 is not hindered by the unevenness or level difference of the ground G.
Further, the load of the load 2 is transmitted to the ground G through a plurality of crawler plates 25 between the front and rear sprockets 14 and 18. For this reason, the ground contact pressure with respect to the ground G can be reduced, and even when the ground G is soft, the crawler belt 27 can be prevented from sinking into the ground G.
Further, since the crawler belt 27 bulges downward between the front and rear sprockets 14 and 18 due to the swelling of the second engaging portion 28b of the chain guide 28, the crawler belt 27 is linearly grounded with respect to the ground G. Since the frictional force at the time of the horizontal rotational movement of each of the carriages 3 and 4 can be reduced, the above-described steering and turning operations can be easily performed.

  According to the transport device 1 of the present embodiment, the transport operation of the luggage 2 can be smoothly performed even on the ground G having an unfavorable condition such as a slight unevenness or a step on the ground G or the ground G being soft. it can.

  As mentioned above, although the mobile trolley | bogie and conveying apparatus of this invention were demonstrated based on one embodiment, this invention is not limited to the structure described in the said embodiment, The structure is suitably in the range which does not deviate from the meaning. Can be changed.

For example, in the above embodiment, as the “first and second wheels” of the present invention, the sprockets 14 and 18 that are in meshing contact with the roller 22 are used. However, the sprockets 14 and 18 are used instead. An idle wheel can be used as appropriate.
The idle wheel is a wheel having a ring-shaped protrusion that fits between the pair of inner link plates 20 and 20 and makes rolling contact with the roller 22.
In the transport carriage 3, the sprocket 18 functioning as a driving wheel is used as it is, and an idle wheel can be used instead of the sprocket 14 functioning as a driven wheel.
In the mobile carriage, the sprocket 14 or the sprocket 18 functioning as a driven wheel in the sense of rotating according to the towing operation of an external towing vehicle (the conveyance carriage 3 in the above embodiment) or both sprockets 14 and 18 are used instead. An idle wheel can be used.

  Since the mobile carriage and the transport device of the present invention have the characteristics that an endless track can be laid on the ground and the ground pressure against the ground can be lowered, there are some unevenness and steps on the ground. Or can be suitably used for the operation of moving / carrying the luggage on the ground under unfavorable conditions such as the ground being soft.

DESCRIPTION OF SYMBOLS 1 Conveying device 2 Luggage 3 Conveying cart 4 Moving cart 5 Dolly body 14, 18 Sprocket (first wheel, second wheel)
DESCRIPTION OF SYMBOLS 19 Roller chain 25 Track plate 28 Chain guide 28a 1st engaging part 28b 2nd engaging part 33 Rotation drive device

Claims (3)

  A movable carriage that lays under the luggage and moves the luggage, wherein the carriage main body on which the luggage is placed has a first wheel and a second wheel arranged at a predetermined inter-axis distance in the horizontal direction, A mobile carriage characterized in that a chain formed by connecting a plurality of links in an annular shape is wound around and mounted on these wheels, and a crawler plate having a plate surface in contact with the ground is attached to the grounding surface side of each link.   A chain guide having an engagement portion that engages with the non-grounding surface side of the lower portion of the chain between the first wheel and the second wheel is provided, and the engagement portion of the chain guide has a downwardly convex shape. The movable carriage according to claim 1, wherein the movable carriage has a bulging shape.   The mobile carriage according to claim 1 or 2 is provided with a rotation driving device for rotationally driving the first wheel or the second wheel to constitute a conveyance carriage, and the conveyance carriage is respectively provided on the left side portion and the right side portion of the luggage. A conveying apparatus characterized in that at least one unit is arranged correspondingly.

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