JPS61171657A - Transport truck - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transport trolley that tilts in a direction to cancel the influence of centrifugal force when making a curve.

Traditionally, in factories, etc., i! was used to transport goods. ! Transport carts are used, but if the center of gravity of the goods and the cart as a whole is high, or if the cart is running at high speed, a large overturning moment will be applied due to centrifugal force when making a curve. However, there is a risk that the transport cart may come off the guide rail or fall over. To prevent this situation, build an embankment on the side opposite to the center of curvature of the curve to form a cant and tilt the entire truck when making a curve, or suspend the loading platform from the frame of the transportation truck to create a pendulum hole. However, in the former case, not only would the equipment cost be expensive, but it would also be a hindrance to changing the layout, and in the latter case, the manufacturing cost of the trolley would be expensive and the structure would be complicated. There is a problem.

- is ・′ Let's P. This invention solves the conventional problem that the structure is complicated and expensive, which becomes an impediment to changing the layout.

1. Tips for divination on mountain 8: This kind of problem lies in the frame and the space in front of this frame.
A substantially vertical pivot axis that is rotatably supported at the rear and tilted downward toward the center of the frame, an axle that is connected at right angles to each pivot axis and has wheels at both ends, and a front This problem can be solved by providing a tie rod that connects one end of the side axle and the other end of the rear axle.

1” When traveling straight, each axle is aligned perpendicular to the front and back direction of the frame (
The frame is horizontal.

Next, when the truck approaches a left curve, for example, the front axle rotates counterclockwise, while the rear axle rotates clockwise in the opposite direction to the front axle due to the tie rod. At this time, since the pivoting axes are all inclined so as to approach the center of the frame as they go downward, the rotation causes the entire frame of the truck to be evenly inclined so that the left side thereof is lowered. As a result, the frame becomes substantially perpendicular to the direction of the resultant force of centrifugal force and gravity generated when making a curve, and the influence of centrifugal force is canceled out as much as possible.

Also, at this time, since both axles rotate in opposite directions, a counterclockwise couple is generated on the frame due to wheel slippage.
This causes one bogie to curve to the left. in this way,
The influence of centrifugal force can be minimized without providing any facilities on the floor side and with a simple and inexpensive trolley structure.

Support 1 Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Figure 1.2.3, l is a transport trolley used in factories, etc. This transport trolley 1 has a horizontal, approximately rectangular frame, and the articles to be transported are placed on this frame 2. be done. The frame 2 has a front boss 3 on the lower front surface, and a bearing 4 is attached to the front boss 3 to support the frame 2.
A front pivot shaft 5 substantially perpendicular to the front pivot shaft 5 is rotatably supported. Further, the frame 2 has a rear post 8 on the rear lower surface, and a rear pivot shaft 8 substantially perpendicular to the frame 2 is rotatably supported on the rear boss 6 by a bearing 7.

0ゎ、、、□□１． and ヮ□□1□2, O, - As it goes downward, it is inclined so as to approach the center (center of gravity) of the frame 2, and the inclination angle a of these front rotation axis 5 and rear rotation axis 8 is
Both are preferably in the range of 5 degrees to 15 degrees. This makes it possible to minimize the influence of centrifugal force due to normal truck speed and curve radius. These front pivot axes5. The lower end of the rear pivot shaft 8 is provided with the front pivot shaft 5, respectively.
, axles 9 and 10 perpendicular to the rear pivot axis 8 are connected at their longitudinal centers, and the central portions of these axles 9 and 10 are cut from both sides to have a rectangular cross section. each axle 8.10
Wheels 11, 12, 13, 14 are attached to the shaft 1 at both ends of the
It is rotatably supported via 5. When the axles 9 and 10 are perpendicular to the longitudinal direction of the frame 2, the transport vehicle 1 moves straight in the front-rear direction. A bracket) 1G is fixed to one end of the axle 9, and an axle lO
A bracket 17 is fixed to the other end. These brackets 16 and 17 have ball and socket joints 18 and 18 at both ends.
They are connected by tie rods 20 having 19. Further, horizontal arms 21.22 projecting forward are attached to the longitudinal center of the axle 8°10, and guide rollers 23.24 are attached to the lower surface of the tip of each arm 21.22.
Each member is rotatably supported. These guide rollers 23 and 24 are housed within a guide rail 213 laid on the floor surface 25. The tip of the arm 21 is
By means of a connecting rod 29 having a ball and socket joint 28 at both ends,
It is connected to another transport trolley (not shown) running in front. As a result, the illustrated transport trolley l travels while being towed by the transport trolley on the front side. Also, the axle lO
An arm 30 that protrudes toward the rear is attached to the center of the arm 3o, and the tip of this arm 3o has ball joints 3 at both ends.
It is connected by a connecting rod 32 with 1 to another transport vehicle (not shown) running behind. As a result, the illustrated transport vehicle 1 pulls the rear transport vehicle 9.

Next, the operation of one embodiment of the present invention will be explained.

First, when the transport vehicle 1 is moving straight ahead, the guide rollers 23.2 are attached to the linear guide rail 28.
4 is guided, so the axle 8.10 is the frame
It is perpendicular to the longitudinal direction of 2. At this time, the frame 2 is horizontal, and the centrifugal force due to the curve is not acting on the articles on the frame 2.Next, when the transport vehicle 1 approaches, for example, a left curve, the guide roller 23 moves around the curve. The arm 21 is pushed by the guide rail 26 that is
．． The axle 9 and the front pivot shaft 5 integrally rotate counterclockwise about the front pivot shaft 5. The rotation of the axle 8 is transmitted to the axle 10 by the tie rod 20.

The axle 10 is integrated with the rear pivot shaft 8 and rotates in a clockwise direction opposite to the axle 8 by an equal angle to the axle 9. At this time, since both the front pivot shaft 5 and the rear pivot shaft 8 are inclined so as to approach the center of the frame 2 as they move downward, the wheels 11 and 13 approach the frame 2 due to the rotation, and on the other hand, The wheels 12,14 are spaced apart from the frame 2, with the result that the frame 2 is tilted generally down on the left side.

As a result, the frame 2 becomes substantially perpendicular to the direction of the resultant force of centrifugal force and gravity generated during the curve, and in particular, the influence of centrifugal force on the article is negated as much as possible. Also, at this time, since the axles 8 and 10 rotate in opposite directions, a counterclockwise couple acts on the frame 2 due to the slippage of the wheels 11.12 and 13.14 and the floor surface 25. As a result, the carriage l curves to the left in the same direction as the curve direction of the guide rail 28.

As explained above, according to the present invention, the influence of centrifugal force can be minimized without providing any facilities on the large side, and with a simple and inexpensive trolley structure. .

[Brief explanation of drawings]

1 is a plan view showing the right half of an embodiment of the present invention in cross section, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line B-B in FIG. FIG.

Claims (1)

[Claims] A frame, a substantially vertical pivot shaft that is rotatably supported at the front and rear of the frame and tilted downward toward the center of the frame, and wheels connected at right angles to each pivot shaft and mounted at both ends. What is claimed is: 1. A transport trolley comprising: an axle provided with a front axle; and a tie rod connecting one end of the front axle and the other end of the rear axle.