JP2010254070A - Trailing truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a trailing truck in the technical field of demonstrating the braking force to the braking and the stopping of a tow vehicle, more specifically, a trailing truck capable of demonstrating the braking force by effectively using the inertia force by a very simple structure. <P>SOLUTION: A slide plate 3 which is slidable in the towing direction is installed on a base plate 2 on which cargoes of a trailing truck 1 to be towed by a tow vehicle are loaded. A towing plate 7 to be connected to the tow vehicle 10 is provided on a front part of the slide plate 3. A braking wheel 9 is installed on a lower side of the slide plate 3 at the position immediately before a rear wheel 6 installed on a rear lower side of the base plate 2, and the rear wheel 6 is brought into contact with the braking wheel 9 to generate the braking force when the tow vehicle 10 is braked. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention belongs to the technical field of a towed truck that exhibits braking force in accordance with braking and stopping of a tow vehicle, and more specifically, exhibits a braking force by effectively utilizing inertial force with a very simple structure. Related to towed trucks.

  If the towed vehicle towed by the towed vehicle does not have a braking device, when the towed vehicle stops, the following towed towed vehicle pushes the towed vehicle from the back by the action of inertial force and places an excessive load on the towed vehicle. There is a risk of damaging the main body of the carriage and the transported goods. In order to solve such problems, a lot of towed trolleys that are equipped with a hydraulic control device, an anti-lock control device, etc. and that exert a braking force common to the towing vehicle have been disclosed and are known for practical use. It is provided.

  Among them, Patent Document 1 describes a towed truck that exhibits braking force using inertial force. This towed truck is mainly composed of a base frame on which a transported article is loaded and a connecting body that connects the base frame to a manned vehicle (towing vehicle). In the connecting body, the slide shaft provided in the connecting body is operated by the inertial force of the towed carriage, the counter lever interlocked with the slide shaft is operated, and the brake disc mounted on the wheel is operated by the operation of the counter lever. It is set as the structure which can exhibit a braking force by moving the connection metal fitting which attached the brake wire pressed to the side to the front-back direction.

JP 2000-170801 A

It can be noted that the invention of the above-mentioned Patent Document 1 uses the inertial force generated in the towed truck to exert a braking force.
However, this towed carriage has a structure in which a counter lever, a brake disc, a brake wire, and the like are connected in a complicated manner so as to move in conjunction with a slide shaft that moves by inertial force. Therefore, the assembly work is complicated, and repair and maintenance are troublesome. In addition, there is a problem that durability is poor such as a reduction in braking force due to long-term use, and there is a risk that braking will not occur reliably when the towing vehicle is stopped.

Furthermore, since this towed truck is towed by a manned vehicle (towed vehicle), it is described that the lock is manually released in order to release the braking. Recently, many automated guided vehicles (AGVs) that are self-propelled by automation are used at manufacturing sites, but this known invention is considered to be a technology that is difficult to apply to a towed truck that is pulled by such an automated guided vehicle.
Incidentally, at present, no technology has been seen to effectively demonstrate the braking force of a towed truck pulled by an automated guided vehicle with a simple structure, and an effective invention is expected.

  The object of the present invention is to solve the above-mentioned problems, and it is possible to perform braking using an inertia force effectively and reliably with a very simple structure, and can always exhibit a stable braking force. The object is to provide a towed truck having excellent applicability to the vehicle.

As means for solving the above-described problems of the prior art, the towed cart according to the invention described in claim 1 is:
A slide plate 3 that can be moved back and forth in the towing direction is installed on a base plate 2 on which a load of the towed truck 1 to be pulled by the towing vehicle is loaded. Plate 7 is provided,
A control wheel 9 is installed on the lower surface of the slide plate 3 immediately before the rear wheel 6 installed on the rear lower surface of the base plate 2, and the rear wheel 6 is connected to the braking wheel 9 when the towing vehicle 10 is braked. It is configured to generate a braking force upon contact.

The invention described in claim 2 is the towed truck described in claim 1,
The front wheel 5 of the base plate 2 is a free wheel that can turn, and the rear wheel 6 is a fixed wheel that does not turn.

The invention according to claim 3 is the towed carriage according to claim 1,
The control wheel 9 of the slide plate 3 is an omni wheel that can move only forward, backward, left and right without turning.

  In the towed cart 1 according to the invention described in claim 1, a slide plate 3 that can be moved back and forth in the towing direction is installed on a base plate 2 on which a load is loaded, and a tow vehicle 10 is disposed at the front of the slide plate 3. And a control wheel 9 is installed on the lower surface of the slide plate 3 immediately before the rear wheel 6 installed on the rear lower surface of the base plate 2. When the towing vehicle 10 starts braking, the base plate 2 moves forward (slides) relatively forward due to inertial force with respect to the slide plate 3 that is connected by the towing vehicle 10 and the towing plate 7 and moves integrally. The rear wheel 6 of the base plate 2 comes into contact with the control wheel 9 of the slide plate 3. At that time, the towed truck is braked by the frictional force generated at the contact point between the wheels 6 and 9. That is, when the traveling tow vehicle 10 is braked and stopped, the towed cart 1 is also braked and stopped accordingly.

Since the present invention has a very simple structure in which braking force is generated simply by contact between wheels, assembly and maintenance work can be easily performed and braking by contact between wheels is always performed when the towing vehicle 10 is stopped. Since it demonstrates its function, it is equivalent to a configuration equipped with a brake mechanism.
In addition, since the wheels 6 and 9 are always separated when the towing vehicle 10 starts, no operation such as unlocking is required. Therefore, as a towed cart of an automated guided vehicle (AGV) that is frequently used in recent years, it can be easily implemented without changing the design, and is highly versatile.

  In the inventions of claims 2 and 3, the rear wheel 6 of the base plate 2 is a fixed wheel that does not turn, and the control wheel 9 of the slide plate 3 is also an omni wheel that does not turn. When the wheel contacts the control wheel 9 of the slide plate 3, the two wheels do not move unnecessarily or carelessly such that the two wheels turn, and the two wheels are surely in contact with each other and stably contact each other. Demonstrates great braking power. The presence of the control wheel 9 (omni wheel) does not hinder the direction change of the towed truck.

It is a top view which shows the outline | summary of the towed truck which concerns on this invention. It is a side view of the towed truck according to the present invention. It is a bottom perspective view of the towed truck according to the present invention. It is a disassembled perspective view which shows the structure of a slide means. A, B, and C are reference diagrams showing the operating conditions of the brake mechanism of the towed truck according to the present invention.

In the towed cart 1 of the present invention, a slide plate 3 that can be moved back and forth in the towing direction is installed on a base plate 2 on which a load of the towed cart 1 towed by the towed vehicle 10 is loaded. The traction plate 7 connected to the traction vehicle 10 is provided in the section.
A control wheel 9 is installed on the lower surface of the slide plate 3 immediately before the rear wheel 6 installed on the rear lower surface of the base plate 2, and the rear wheel 6 is connected to the braking wheel 9 when the towing vehicle 10 is braked. It is set as the structure which contacts and generate | occur | produces braking force.

Below, the Example of the towed trolley | bogie which concerns on this invention is described based on drawing.
FIG. 1 shows a plan view of a towed truck of the present invention, and FIG. 2 shows a side view thereof. FIG. 3 is a bottom perspective view of the towed truck.
As shown in FIG. 5, the towed cart 1 of the present invention is an automatic guided vehicle (AGV) that is used in various manufacturing sites in recent years and that self-travels a travel route determined in advance by destination guide guidance control. It is suitably implemented as a towed truck that is towed.

  As shown in FIGS. 1 and 2, the towed cart 1 shown in the figure is basically movable on the base plate 2 on which a load is loaded, and on the lower surface side of the base plate 2, and can be moved back and forth in the towing direction. It consists of a slide plate 3. The base plate 2 and the slide plate 3 are connected by two parallel slide means 4 and 4 attached to the left and right ends of the lower surface of the base plate 2, and the base plate 2 and the slide plate 3 are restrained only in a certain direction. It is possible to slide.

As shown in FIG. 4, the slide means 4 includes a guide rail 40 having a U-shaped cross section, a bearing holder 41 having a plurality of bearing balls mounted on both side surfaces that slide in the groove of the guide rail 40, and It comprises a slide rail 42 that moves in conjunction with the bearing holder 41. The guide rail 40 is coupled to the lower surface of the base plate 2, and the slide rail 42 is coupled to the upper surface of the slide plate 3, so that the base plate 2 and the slide plate 3 are slidably coupled.
The length and the mounting position of the guide rail 40 will be described in accordance with the relationship with the wheels attached to the base plate 2 and the slide plate 3.

  Two front wheels 5 and two rear wheels 6 are respectively attached to the lower surface of the base plate 2 by bolting in a predetermined arrangement. The front wheels 5 and 5 are so-called free wheels that can turn and can freely change the traveling direction in order to correspond to the direction change of the automatic guided vehicle 10. The rear wheels 6 and 6 that simply follow the vehicle are fixed wheels that do not turn.

Next, the slide plate 3 will be specifically described. In the slide plate 3, a traction plate 7 for pulling the towed carriage 1 to the automatic guided vehicle 10 (AGV) (see FIG. 5) is parallel to an intermediate position between the two slide means 4, 4. Are connected to each other by bolts by connecting means 8.
The connecting means 8 in the illustrated example is provided to reduce the stress concentrated on the traction plate 7 at the time of towing and braking, and the same configuration as the above-described sliding means 4 is omitted although details of the structure are omitted. It is said that.

That is, the slide means 8 is constituted by a U-shaped guide rail 80, a bearing holder 81 that travels within the guide rail 80, and a slide rail 82 that moves in conjunction with the bearing holder 81. The guide rail 80 is coupled to the lower surface of the base plate 2 and the slide rail 82 is coupled to the upper surface of the traction plate 7 so that the slide plate 3 and the traction plate 7 slide smoothly together.
Of course, the connecting means 8 is not limited to this, and as shown in FIG. 3, the connecting means 8 can be implemented without slidable fixing by simply attaching the connecting plate and bolting them together, It is also possible to provide a single unit protruding from the slide plate 3 and omitting the connecting means 8.

It is also preferable that the two slide means 4 and the slide means 8 described above be implemented with a configuration in which a buffer means such as rubber or a spring is provided at an end portion in the traveling direction.
A through hole 70 is provided at the tip of the pulling plate 7 and is connected to a connecting means 11 (see FIG. 5) extending from the automatic guided vehicle 10.

Two control wheels 9 are attached to the lower surface of the slide plate 3.
The mounting position of the control wheel 9 is set at a position immediately before the rear wheels 6 and 6 installed on the lower rear surface of the base plate 2, that is, at a front position on a horizontal line R passing through the rear wheel 6 in the traveling direction. Yes. In short, the rear wheel 6 that moves forward by the action of inertial force is attached so as to be in the same line contact with the control wheel 9 during braking of the towing vehicle.

  Specifically, the control wheel 9 is a wheel called an omni wheel which can move back and forth and right and left without turning, which is often used in the robot field. Therefore, when the rear wheel 6 of the base plate 2 comes into contact with the control wheel 9 of the slide plate 3, the two wheels 6 and 9 do not inadvertently move so as to come into contact with each other. They can contact each other with certainty and exhibit a stable braking force, so that the direction change of the towed truck 1 is not hindered. Since the control wheel 9 is an omni wheel that can move in the front-rear and left-right directions, the direction of the towed truck 1 can be freely changed even if it has a three-wheel structure in the front-rear direction.

  Here, the length and attachment position of the two slide means 4 that enable the above operation will be described. The slide means 4 is slidable until the control plate 9 and the rear wheel 6 of the base plate 2 come into contact with each other in a rearward direction, and the control wheel 9 is in front of the base plate 2 turning forward. It is attached at a length and a position where it can slide to a range where it does not contact the wheel 7.

Next, the operation state and concept of the brake mechanism of the towed truck of the present invention will be described based on FIGS. 5A to 5C.
First, FIG. 5A shows a situation in which the towed truck 1 loaded with the conveyed product G is being pulled by the automatic guided vehicle (AGV) 10 via the pulling plate 7 and traveling.
At this time, the slide plate 3 of the towed truck 1 is at the tip position of the slide means 4, and the control wheel 9 is located between the front wheel 5 and the rear wheel 6 of the base plate 2 in the illustrated example.
FIG. 5B shows a situation in which braking is started by the brake system mounted on the automatic guided vehicle 10.
When the automatic guided vehicle 10 starts braking, the base plate 2 moves forward (slides) forward relative to the slide plate 3 connected to the automatic guided vehicle 10 by the traction plate 7 and moving integrally. come. When the automatic guided vehicle 10 stops (or strong braking works), the rear wheel 6 of the base plate 2 comes into contact with the control wheel 9 of the slide plate 3 as shown in FIG. 5C. At this time, a braking force is generated by the frictional force generated on the contact surfaces of both wheels, so that the towed cart 1 is reliably braked.

  Although the embodiments have been described with reference to the drawings, the present invention is not limited to the illustrated examples, and includes a range of design changes and application variations that are usually made by those skilled in the art without departing from the technical idea thereof. I will add that just in case. For example, the present embodiment has been described by taking the towed truck 1 towed by a self-propelled automated guided vehicle as an example, but can also be applied to a towed truck such as a trailer towed by a manned towed vehicle such as a large truck. It is.

DESCRIPTION OF SYMBOLS 1 Towed trolley 2 Base plate 3 Slide plate 4 Slide means 5 Front wheel 6 Rear wheel 7 Tow plate 8 Slide means 9 Control wheel 10 Traction vehicle

Claims (3)

A slide plate that can be moved back and forth in the towing direction is installed on the base plate that loads the towed cart that is towed by the towing vehicle, and a tow plate that connects to the towing vehicle is provided at the front of the slide plate And
A control wheel is installed on the lower surface of the slide plate immediately before the rear wheel installed on the rear lower surface of the base plate. When braking the towing vehicle, the rear wheel contacts the braking wheel and generates braking force. A towed carriage characterized by being configured to perform.   The towed cart according to claim 1, wherein the front wheel of the base plate is a free wheel that can turn, and the rear wheel is a fixed wheel that does not turn.   The towed carriage according to claim 1, wherein the control wheel of the slide plate is an omni wheel capable of moving only in the front-rear and left-right directions without turning.

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