JP2002179386A - Work conveyance device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work conveyance device for conveying the work to an assembly position by one workman, without flawing it, and without imposing a work load on the workman. SOLUTION: An elevating frame 8 is elevatingly guided by an elevating cylinder 7 on a vertically extended vertical guide rail 5 attached so as to rotate around a vertical axis on a movable body 2 guided and traveling on an elevated guide rail 1. A work receiving member 12 attached so as to vertically rotate on a tip of a horizontally fixed arm 9 and changing attitudes between the vertical direction and the horizontal direction by an attitude changing cylinder 13 is provided on the elevating frame 8. A balance controlling means detecting weight of a received work and controlling a fluid pressure of the elevating cylinder 7 so as to balance the weight of the work is provided on the work receiving member 12. The work on a rack is received by the work receiving member 12 in a horizontal attitude, the work receiving member 12 having received the work is changed to a vertical attitude, and the work is conveyed to an assembly spot of a body to be assembled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work transfer apparatus for transferring a heavy work to an assembly part of an assembly.

[0002]

2. Description of the Related Art A front bumper is mounted on a cab in an assembly line of a large vehicle such as a truck.
Conventionally, the front pump is laid on the processing table installed on the line side with the back side facing up,
Necessary parts are attached, assembled to the cab, and transported from the processing table to the assembly position on the front of the cab for assembly.

[0003]

In order to transport a front pump having a weight of about 36 kg from a processing table to a cab,
There is a method in which a wire is hung on the front pump, lifted from the worktable with a hoist and a lifting tool, and transported to the assembly position on the front of the cab. Since there is a risk of damaging parts, two workers lifted them from the processing table by hand and transported them to the assembly position on the front of the cab, which required a lot of labor and labor. .

An object of the present invention is to solve the above-mentioned conventional problems,
An object of the present invention is to provide a work transfer device that can transfer a work to an assembling position without damaging the work by one worker and without burdening the work.

[0005]

In order to achieve the above object, the construction of the present invention is to provide an assembling portion for an object to be assembled by setting a work placed on a gantry sideways in a standing position. A vertical guide rail extending vertically, rotatably mounted around a vertical axis on a moving body that is guided by an elevated guide rail disposed at a high place and travels. An elevating frame that is guided by the elevating guide rail so as to be able to ascend and descend and is moved up and down by an elevating cylinder arranged in an axial direction parallel to the longitudinal guide rail;
An arm horizontally fixed to the elevating frame,
A work receiving member that is pivotally attached to the tip end of the arm so as to be pivotable in the vertical direction and that changes the posture in a vertical direction and a horizontal direction by a posture conversion cylinder; and Received by the work receiving member in the posture,
The work receiving member that has received the work is converted into a vertical posture and is conveyed to an assembling part of an assembling body.

[0006] Further, there is provided an apparatus for transporting a work, which is placed horizontally on a gantry, to a mounting position of a body to be mounted in an upright posture, wherein the elevated guide is provided at a high place. A vertically extending vertical guide rail attached to a moving body guided by a rail so as to be rotatable about a vertical axis, and a vertically guided vertical rail that is guided by the vertical guide rail and parallel to the vertical guide rail. An elevating frame, which is vertically moved by an elevating cylinder arranged in an axial direction, an arm horizontally fixed to the elevating frame, A work receiving member for converting the posture between a vertical direction and a horizontal direction by a cylinder, and detecting the weight of the work received by the work receiving member to detect the fluid pressure in the elevating cylinder; Balance control means for controlling the weight and balance of the work, receiving the work on the gantry by a work receiving member in a horizontal position, converting the work receiving member having received the work into a vertical position, and The present invention is characterized in that it is transported to a body assembling place.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1 denotes an elevated guide rail disposed at a high place, for example, an elevated guide rail directed in the line direction in a vehicle assembling line. As shown in FIG. The elevated guide rail 1 is guided by a lateral elevated guide rail 1a orthogonal to the guide rail 1 in a plane.

A moving body 2 is guided on the elevated guide rail 1 so as to be able to travel, and a support plate 3 is attached to the moving body 2 so as to be rotatable around a vertical axis by a rotating shaft 4.

The upper ends of two vertical guide rails 5 extending in the vertical direction are fixed to the support plate 3, and a vertical guide is provided by a stay 6 coupled to the vertical guide rail 5 and the support plate 3. The swing of the rail 5 is prevented.

An elevating frame 8 is guided by the vertical guide rail 5 so as to be able to move up and down, and a horizontal arm 9 is fixed to the elevating frame 8. An L-shaped work receiving member 12 is provided at the tip of the fixed arm 9.
Is mounted so as to be pivotable in the vertical direction by a pivot 11 via a pivot arm 10 so that the work receiving member 12 changes its posture between a vertical vertical direction and a horizontal horizontal direction.

An elevating cylinder 7 for moving the elevating frame 8 up and down is coaxially disposed between the two vertical guide rails 5 so as to cooperate with the vertical guide rail 5. 7 is the support plate 3
, And the piston rod 7 a is connected to the arm 9. Further, the work receiving member 12 has a posture changing cylinder 13 connected between the back surface of the work receiving member 12 and the fixed arm 9.

Further, there is provided a balance control means for detecting the weight of the work W received by the work receiving member 12 and controlling the fluid pressure in the lifting / lowering cylinder 7 in balance with the weight of the work W. This balance control means is shown in FIG.
As shown in FIG. 3, a balance load sensor 15 provided at a joint between the piston rod 7 a of the lifting cylinder 7 and the fixed arm 9, and the flow of air from the air source 16 by the balance load sensor 15 An output signal air circuit 17 using the output signal air as an output signal air.
An air filter 18 for taking in the output signal air from the air filter to eliminate air pulsation, and a speed for adjusting (sensitivity, speed) control air of the lifting / lowering cylinder 7 with respect to the output signal air leaving the air filter 18. Controller 1
9 and an air operated precision regulator 20 for controlling the air supplied from the air source 16 to the lifting / lowering cylinder 7 by the signal air from the speed controller 19. A handle 14 is fixed to the lifting frame 8 above the balance load sensor 15.

When the work W is received by the work receiving member 12 in the operation described later, the balance control means having the above-described configuration outputs signal air corresponding to the weight of the work W from the load sensor 15 for balance as described above. The weight of the work W and the output air are in a proportional relationship. The output signal air passes through an air filter 18 and a speed controller 19 and is input to an air operated precision regulator 20. The air operated precision regulator 20 applies a control air pressure proportional to the air pressure to the lifting / lowering cylinder 7 by the input air pressure. Then, the weight of the workpiece W and the air pressure in the lifting / lowering cylinder 7 are balanced.

The operation of the present invention will be described by taking as an example the operation of assembling the front bumper W to the cab C as shown in FIG. Therefore, the work W will be described below as the front bumper W. The front bumper W shown in FIG. 4 is placed on a processing table (stand) 21 installed on the line side with the back side laid sideways with the back side facing upward, and necessary parts are attached. When the installation of these parts is completed, the handle 1
4 rotates the entire apparatus so that the direction of the fixed arm 9 is directed to the direction of the processing table 21, and approaches the processing table 21. At this time, no air pressure is supplied to the elevating cylinder 7, and the fixed arm 9 is located at the lower end by its own weight with the elevating frame 8, and the work receiving member 12 is indicated by a virtual line in FIG. Thus, the shortening operation of the attitude conversion cylinder 13 results in a horizontal horizontal attitude. The work receiving member 12 in this lateral posture is inserted below the front bumper W mounted on the processing table 21 to supply air pressure to the lifting / lowering cylinder 7, and as shown in FIG. The fixed arm 9 is raised to such an extent that the work receiving member 12 does not interfere with the processing table 21 by the operation of turning the receiving member 12 in the vertical direction.

As the fixed arm 9 is lifted, the front bumper W is mounted on the work receiving member 12 so as to be scooped up by the work receiving member 12 from the processing table 21, and the extension operation of the posture changing cylinder 13 causes the solid line in FIG. The work receiving member 12 is converted into a vertical posture as shown by.

When the front bumper W is mounted on the work receiving member 12 and rises from the processing table 21, the balance load sensor 15 detects the weight of the front bumper W, and the balance control means described above controls the weight of the front bumper W. Balance the weight by supporting it. As a result, for example, the front bumper W weighing about 36 kg is about 4 kg.
It can be moved up and down with a force of up to 6 kgf.

The balance control means is, as described above,
The signal air output by the balance load sensor 15 is eliminated by the air filter 18 to eliminate the pulsation of the air, and the speed controller 19 adjusts the control air (sensitivity and speed) and then supplies the air supplied to the lifting / lowering cylinder 7 to the air operated. Since it is controlled by the precision regulator 20, the front bumper W mounted on the work receiving member 12
A proper balance state according to the weight of the vehicle.

Therefore, the arm 9 fixed by the handle 14 is provided.
Is raised to the position A in FIG. 1 corresponding to the mounting position in front of the cab C that conveys the assembly line, and the entire device is rotated so that the fixed arm 9 faces the front of the cab C. Into the assembly line,
Front bumper W mounted on work receiving member 12
The cab C and the front bumper mounting position of the cab C are adjusted in balance in the vertical direction, and assembled in a predetermined portion. In the moving state in which the cab C is carrying the assembly line at the time of this assembling, the entire apparatus follows the movement of the cab C by the elevated guide rail 1 directed in the line direction and moves between the apparatus and the cab C as shown in FIG. Is secured with an interval S. Therefore, the cab C contacts
And the device is not damaged.

In the above-described embodiment, the description has been given of the transportation of the front bumper W to be assembled to the cab C. However, the present invention is not limited to this, and other assembling members in a vehicle, for example, assembling of a machine tool or assembling of a large household electric appliance. For example, it can be widely applied to the work of transporting a work.

[0020]

As described above, according to the present invention, the work of transporting a heavy work to the assembling part of the body to be assembled can be carried out by one worker without burdening the labor and the work and the work to be assembled. This has the advantage that the attachment can be made without damaging it, and that the assembling position can be easily obtained.

[Brief description of the drawings]

FIG. 1 is a side view of the device of the present invention.

FIG. 2 is a view taken in the direction of arrow B in FIG. 1;

FIG. 3 is a circuit configuration diagram of a balance control unit.

FIG. 4 is a front view of a front bumper showing an example of a workpiece conveyed by the apparatus of the present invention.

FIG. 5 is an explanatory view of a workpiece receiving state by the apparatus of the present invention.

FIG. 6 is a diagram showing a state in which a front bumper is assembled to a cab by the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elevated guide rail 2 Moving body 3 Support plate 4 Rotation axis 5 Vertical guide rail 6 Stay 7 Elevating cylinder 7a Piston rod 8 Elevating moving frame 9 Fixed arm 10 Rotating arm 11 Axis 12 Work receiving member 13 Cylinder for posture conversion 14 Handle 15 Balance load sensor 16 Air source 17 Output signal air circuit 18 Air filter 19 Speed controller 20 Air operated precision regulator

Claims (2)

[Claims] 1. An apparatus for transporting a work, which is placed sideways on a gantry, to a mounting position of a body to be mounted in an upright posture, wherein the elevated guide is disposed at a high place. A vertically extending vertical guide rail attached to a moving body guided by a rail so as to be rotatable about a vertical axis, and a vertically guided vertical rail that is guided by the vertical guide rail and parallel to the vertical guide rail. An elevating frame which is vertically moved by an elevating cylinder arranged in an axial direction, an arm fixed to the elevating frame in a horizontal direction, and pivotally attached to a tip end of the arm so as to be pivotable in a vertical direction for posture conversion. A work receiving member for converting the posture between a vertical direction and a horizontal direction by a cylinder, and receiving the work on the gantry by a work receiving member having a horizontal position; A work transfer device, wherein a receiving member is converted into a vertical position and transferred to a mounting portion of a mounted body. 2. An apparatus for transporting a work, which is placed sideways on a gantry, to a mounting position of a body to be mounted in an upright posture, wherein the elevated guide is disposed at a high place. A vertical guide rail extending vertically, which is rotatably mounted on a moving body guided by rails so as to be rotatable around a vertical axis; and a vertical guide rail which is guided by the vertical guide rail so as to be able to move up and down and is parallel to the vertical guide rail. An elevating frame which is vertically moved by an elevating cylinder arranged in an axial direction, an arm fixed to the elevating frame in a horizontal direction, and pivotally attached to a tip end of the arm so as to be pivotable in a vertical direction for posture conversion. A work receiving member for converting the posture between a vertical direction and a horizontal direction by a cylinder, and detecting the weight of the work received by the work receiving member and detecting the fluid pressure in the elevating cylinder for the work; A balance control means for controlling weight and balance, receiving the work on the gantry by a work receiving member in a horizontal position, converting the work receiving member receiving the work into a vertical position, and A work transfer device, wherein the work is transferred to an assembly station.