JPS611554A - Mobile truck device - Google Patents

Abstract

PURPOSE:To make a bumper project during self-traveling an thereby detect the presence of an obstacle without a moment;s delay, by installing a sensor for obstacle detection in the bumper set up displaceably in a separating direction to the side of a mobile truck. CONSTITUTION:A bumper 6 is attached to the side of a truck through an expansion member 12 via a sensor 5. The expansion member 12 is constituted of a hydraulic cylinder 7, and so designed as to be operated pressure oil out of an expansion driving control part 9. The bumper 6 is projected out of a self-propelled truck 1 free of expansion or contraction by means of the expansion member 12, while since its expansion member 61 at both ends is elastically constituted in structure, a collision range by the bumper 6 is alterable at will. During operation of the self-propelled truck, the bumper is projected outward so that a collision between the bumper and an obstacle is promptly detectable, thus a possibility of the self-propelled truck coming into collision with the obstacle can be held back to the minimum.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a mobile trolley device, and particularly to a device for detecting a collision with an obstacle.

[Prior art]

Conventional mobile cart devices of this type have been constructed as shown in FIG. 1 and FIG. 2. That is, in FIGS. 1 and 2, - (1) is a self-propelled truck having a wheel drive unit, (8) is a device for controlling this self-propelled truck (1), and (4) is this self-propelled truck (1). The arm part (5) is attached to the mounting part of the self-propelled trolley (1) and the bumper (6), and is attached to the arm part (5) for grasping an object to be grasped (not shown), and is a touch sensor for detecting collisions with obstacles such as people or objects. Or it is part of a sensor such as a limit switch.

In this conventional device, an object to be gripped is gripped by an arm portion (4) and conveyed by driving a wheel drive portion (2).

In this case, if an obstacle such as an object or a person hits the bumper (2) while the self-propelled trolley (1) is moving or grasping an object, the sensor part (6) detects this and the self-propelled trolley The structure is designed to minimize collisions and runaway accidents.

However, since this conventional collision detection device is installed with a fixed distance between the bumper and the running truck, the collision detection area is limited. Furthermore, in the case of a self-propelled trolley (1) that moves while gripping an object, there are drawbacks such as the arm (4) getting in the way when detecting obstacles in the direction in which the arm (4) is attached. [Summary of the Invention] This invention has been made to eliminate the drawbacks of these conventional devices, and includes a bumper disposed on the side of a movable cart so that it can be displaced in the isolation direction, and an end portion of the bumper that is extendable and retractable. To provide a movable trolley device which is safe and reliable in operation, and is configured to detect a collision between a bumper and an obstacle using a sensor, so that the collision detection area for the obstacle can be changed.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 8 to 6. That is, in Figures 8 to 6 (7) (8)
is an oil field cylinder to which pressure oil is supplied from the telescopic drive control unit (9), which is a part of the control device (8) including the pressure oil supply unit, via the pressure oil pipe ←0)α; (b) is the oil pressure Cylinder (γ)
a bellows-like telescopic member 11 which is telescopically driven by and isolates the hydraulic cylinder (8) from the self-propelled trolley (1);
) are arranged at both ends of the bumper (6) and hydraulic cylinders (8
) is a bellows-like telescopic member for a bumper that is telescopically driven. In addition, other configurations are in section trgJ.
Since it is the same as the conventional one shown in FIG. 2, the explanation will be omitted.

In this way, the object to be grasped is grasped by the arm section (4) and moved by the wheel drive section (2). Here, while the self-propelled trolley (1) is moving and previously grasping the object to be grasped, a part of the sensor (5) attached to the mounting part of the bumper (6) detects an object or person on the bumper (6). As with the conventional system, it detects when the self-propelled trolley (1) hits an obstacle and minimizes collisions and runaways of the self-propelled trolley (1).

By the way, the bumper (6) is telescopically protruded from the self-propelled cart (1) by the telescopic member α, and the telescopic members 111 at both ends are configured to be telescopic, so that the collision detection area by the bumper (6) is It can be changed. In this case, the telescopic part #a2an is the telescopic drive control part (9)
The expansion and contraction can be synchronized and adjusted.

However, when the self-propelled trolley (1) is stopped and obstacle collision detection is not required, or when the arm (4) grasps an object, the bumper (6) may interfere with the work of the arm (4). When it becomes
What is necessary is to reduce the size of the bumper (6).

Therefore, when the self-propelled trolley is operating, the bumper should be protruded to quickly detect collisions between the bumper and obstacles to minimize collisions between the self-propelled trolley and obstacles! This allows the driver to drive safely.

Additionally, in the above embodiment, a self-propelled trolley that moves by gripping an object with an arm part was explained, and the telescoping bumper was configured as shown in the figure. Any method may be used as long as it can change the collision detection area against an obstacle.

〔Effect of the invention〕

As described above, the mobile cart device according to the present invention is configured so that the collision detection area of an obstacle can be changed.
You can enjoy safe driving and refreshing movements.

[Brief explanation of the drawing]

Figures 1 and 2 show a conventional mobile trolley system M of this type, with Figure 1 being a perspective view, Figure 2 being a plan view, and Figures 8 to 8.
Each of FIG. 6 shows an embodiment of the present invention.
The figure is a perspective view, Figure 4 is a plan view, and 5th TgJ is 7 in Figure 4.
FIG. 6, which is an enlarged view of a portion, is a plan view showing operation mode III. In the figure, (1) is a self-propelled trolley, (2) is a drive wheel, (8) is a control device part, (4) is an arm part; 5) is a part of a sensor,
(6) is a bumper, (7) and (8) are oil field cylinders, (9
) is the telescopic drive control unit, ni)(b) is the pressure oil piping, and shiyu is the telescopic member. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] (1) A bumper disposed so as to be displaceable in the isolation direction with respect to the side surface of the movable trolley, and whose end portion is formed to be extendable and retractable;
A mobile trolley device that includes a sensor that detects when the bumper collides with an obstacle, and is configured to change the area of collision detection with respect to the obstacle. (2) The movable trolley device according to claim 1, wherein the displacement of the bumper and the extension/contraction operation of the end portion are performed by a hydraulic mechanism. (8) The movable trolley device according to claim 1 or 2, wherein the sensor is provided at a portion where the bumper is attached to the movable trolley.