JPS641356Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (industrial application field) This invention relates to a stabilizer for an automatic guided vehicle.

(Prior Art) Conventionally, as shown in FIGS. 3 and 4, a stabilizer S of an automatic guided vehicle for transporting tiles, etc. is mounted inside a pair of masts 2 erected on one side of a vehicle platform 1. A pair of arms 3 supported so that they can be raised and lowered
and a presser plate 4 fixed to the upper ends of both arms 3 via a connecting part 4a.
As shown in FIG. 4, a cushion 14 having a flat pressing surface 14a is adhered to the plate 6 fixed to the lower surface of the cushion. A hydraulic double-acting cylinder 15 is connected to a bracket 7 installed between the lower parts of both the masts 2, and a piston rod 15a of this hydraulic double-acting cylinder 15 is connected to a bracket 9 installed between the upper parts of both arms 3. connected. Then, by the vertical movement of the piston rod 15a, the presser plate 4 is raised and lowered via the arm 3,
As shown in FIG.
The tile T can be held between the moving device 1a on the chassis 1 and the moving device 1a on the chassis 1.

(Problem to be solved by the invention) However, since the stabilizer S uses only the hydraulic pressure of the double-acting cylinder 15 to clamp the tile T, (a) the hydraulic pump motor is not driven during this clamping. (b) Since the piston rod 15a is moved by hydraulic pressure in both reciprocating directions, piping for reciprocating is required in the hydraulic circuit. The structure is complicated and maintenance is troublesome; (c) a throttle valve is required in the hydraulic circuit to press the tile T smoothly without applying sudden force; (d) it is difficult to adjust the pressing force. There were problems such as:

Structure of the invention (means for solving the problem) In view of this problem, the present invention consists of an arm supported so as to be movable up and down with respect to a mast installed on the chassis, and a presser plate fixed to this arm. Connected between the mast and the arm is a single-acting cylinder that raises the arm, and a spring that lowers the arm in parallel with the single-acting cylinder.

(Function) When the cylinder is released with an object to be transported, such as a tile, placed on the chassis, the tension of the spring causes the presser plate to descend via the arm, and the weight of the stabilizer and the tension of the spring cause the object to be transported. is held between the holding plate and the undercarriage. on the other hand,
When the presser plate is raised together with the arm against the tension of the spring by the cylinder, the grip on the conveyed object is released.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 and 2, focusing on improvements over the prior art.

This embodiment is a hydraulic double-acting cylinder 1 of the prior art.
Hydraulic single acting cylinder 8 and spring 1 in place of 5
This method differs greatly from the conventional technology in that 0 is used. That is, a hydraulic single-acting cylinder 8 is connected to the bracket 7 of the mast 2, and its piston rod 8a is connected to the bracket 9 of the arm 3, and the lower ends of the springs 10 on both sides of the hydraulic single-acting cylinder 8 are connected to the mast 2. The spring 10 is connected to the bracket 7 via a hook 11, and the upper end of the spring 10 is connected to the bracket 9 of the arm 3 via a hook 12. The hook 11 is inserted through the bracket 7, and a double nut 13 is screwed onto the lower end of the hook 11, so that the tension of the spring 10 can be adjusted by changing the locking position of the double nut 13 with respect to the bracket 7. . Further, the pressing surface 5a of the cushion 5 of the pressing plate 4 is formed in a wave-like uneven shape as shown in FIG.

Then, with the tile T, which is the object to be transported, placed on the moving device 1a of the chassis 1, the hydraulic single-acting cylinder 8
When released, the holding plate 4 descends via the arm 3 due to the tension of the spring 10, and the tile T is moved between the cushion 5 of the holding plate 4 and the moving device 1a due to the weight of the holding plate 4 and the arm 3, and the tension of the spring 10. It is held smoothly between the two without any sudden force being applied. Note that the holding force of the tile T is adjusted by changing the tension of the spring 10. In addition, since the holding surface 5a having a corrugated concave and convex shape securely grips the tile T, it is possible to sufficiently cope with steps caused by the inclination of the tile T and external forces in the vertical and horizontal directions.
This improves the stability of the cargo and prevents the cargo from collapsing.

On the other hand, the piston rod 8 of the hydraulic single-acting cylinder 8
When a moves upward against the tension of the spring 10,
The press plate 4 is raised via the arm 3, and the grip on the tile T is released.

Effects of the invention In short, according to the invention, not only a cylinder but also a spring is used as the lifting and lowering mechanism of the stabilizer. Because of this, there is no need to drive the cylinder hydraulic pressure or the hydraulic pump motor, which reduces battery consumption and extends the operating time of the automated guided vehicle (b)
Since the cylinder may be a hydraulic single-acting type, there is no need for reciprocating piping, which simplifies the piping structure and facilitates maintenance. (c) Since the hydraulic pressure of the cylinder is not used when clamping conveyed objects such as tiles, it can be held smoothly without incorporating a throttle valve into the hydraulic circuit, and sudden force is not applied.
(d) The spring can be finely adjusted from the outside, and the presser force can be easily adjusted just by finely adjusting the spring. (e) The component for maintaining the clamping state is the spring. This has advantages such as easy maintenance.

[Brief explanation of the drawing]

Fig. 1 is a side view of an automated guided vehicle equipped with a stabilizer according to an embodiment of the present invention, Fig. 2 is a partially enlarged view showing the lifting mechanism of the stabilizer, and Fig. 3 is a tile unmanned vehicle equipped with a conventional stabilizer. FIG. 4, a side view of the transport vehicle, is a partially enlarged view showing the lifting and lowering mechanism of the stabilizer. 1 is a chassis, 1a is a moving device, 2 is a mast, 3 is an arm, 4 is a presser plate, 5 is a cushion, 5a is a presser surface, 8 is a hydraulic single-acting cylinder, 8a is a piston rod, 10 is a spring, S is a stabilizer,
T is a conveyed object such as a tile.

Claims (1)

[Scope of utility model registration request] It consists of an arm that is supported so as to be able to rise and fall on a mast that is erected on the vehicle chassis, and a presser plate that is fixed to this arm. Between the mast and the arm, there is a single-acting cylinder that raises the arm, A transport vehicle stabilizer that is connected to a spring that lowers the arm in parallel.