JPH04310334A - Conveyor truck for engine assembly - Google Patents

Abstract

PURPOSE:To provide an engine assembling conveyor car capable of setting a support base mounting the engine to be assembled at a sufficiently low position, capable of narrowing the opposite distance of the above engine and a worker and capable of executing the two kinds of assembly works hose assembly positions differ in opposition vertically to the body to be assembled by the same transfer truck and capable of improving the workability drastically. CONSTITUTION:A monorail type conveyor truck 1 self-travelling along a guide rail 2 and a horizontal support base 3 revolvably supported around a horizontal axis Y as well as supported in a cantilever shape to the same conveyor truck 1 with its being overhang horizontally to the side part from this conveyor truck 1 are equipped, and attachments 5A, 5B for supporting an engine respectively are provided at the upper face and lower face sides of the above horizontal support base 3.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine assembly vehicle used in an engine assembly line for automobiles and the like.

0002

[Prior Art] Conventionally, this type of engine assembly vehicle was
For example, the system includes a transport vehicle that moves by itself by engaging with guide rails laid on the floor, and an attachment for supporting the engine is attached to a support base provided on the upper surface of the transport vehicle.

For example, when assembling a cylinder head to a cylinder block on an engine body assembly line, the cylinder block is placed in a normal upright position on a support stand of a conveyor cart, and the cylinder block is The lower part is supported by an attachment for supporting the lower part of the cylinder block that is provided in advance on the support base, and in this state, the transport vehicle is moved to the head assembly station,
Therefore, the cylinder head is assembled on the top of the cylinder block. Afterwards, when assembling the oil pan to this cylinder block, first turn this cylinder block upside down so that the top and bottom are reversed, and then use a support stand on another transport vehicle equipped with an attachment for supporting the top of the cylinder block. The other transport vehicle is moved to the oil pan assembly station while being supported by the upper support attachment, and the oil pan is assembled.

0004

[Problems to be Solved by the Invention] Conventional engine assembly vehicles are equipped with a support stand on the top of the vehicle as described above, which makes it difficult to assemble cylinder heads to cylinder blocks on engine assembly lines. In this case, the cylinder head was installed at a considerably high position, resulting in very poor workability. Furthermore, when assembling a manifold or the like to the side surface of a cylinder block, the worker can do so at a fixed location by rotating the turntable, but since the carrier itself has a considerable width, The distance between the operator and the cylinder block on the turntable became considerably large, and work efficiency was also poor from this point of view.

Furthermore, in conventional transport vehicles, each transport vehicle is provided with an attachment for supporting the engine at only one place on the upper surface of the support base, so that the attachment position for supporting the engine is located above and below the cylinder block. When assembling cylinder cylinder heads and oil pans that face each other and are different from each other, separate transport vehicles are required for each.

[0006]

[Means for Solving the Problems] In order to solve the above-mentioned conventional problems, the present invention provides a monorail-type transport vehicle that runs on its own along a guide rail, and a horizontally extending horizontal direction from the transport vehicle. a horizontal support stand that extends out from the top and is supported in a cantilever manner with respect to the transport vehicle and is rotatably supported around a horizontal axis, and engine support is provided on the upper and lower sides of the horizontal support stand, respectively. This paper proposes a transport vehicle for engine assembly, which is equipped with an attachment for engine assembly.

[0007]

[Embodiments] The embodiments of the present invention will be explained below based on the attached illustrative drawings. In FIGS. 1 and 2, 1 is a transport vehicle that runs on its own along a guide rail 2, and 3 is a horizontal support platform. It extends horizontally from the transport vehicle 1 and is supported in a cantilever manner with respect to the transport vehicle 1. Horizontal support stand 3
A turntable 4 rotatable around a vertical axis X is provided above, an engine support attachment 5A is provided on the bottom surface of the horizontal support 3, and another engine support attachment 5B is provided on the top surface of the turntable 4. It is provided. The attachment 5A supports the cylinder head CH assembled to the cylinder block CB.
It is also assumed that the attachment 5B supports the lower part of the cylinder block CB.

[0008] To explain the above structure in more detail,
The transport trolley 1 consists of a driving trolley 6 and a driven trolley 7 arranged at front and rear positions in the traveling direction, and a machine frame 8 that connects these. The moving drive wheels 10 and the guide rail 2
vertical axis roller 11 for steady rest sandwiching the drive wheel 1;
The driven trolley 8 is composed of a support frame 13, idle wheels 14 rolling on the upper surface of the guide rail 2, vertical shaft rollers 15 for steady rest, etc. configured. In addition, the drive trolley 6
The driven trolleys 7 and 7 are each rotatably connected to the machine frame 8 via a bearing unit 16 about its vertical axis, so that they can travel on the curved portion of the guide rail 2. The driving trolley 6 is provided with a current collecting unit 17, which is arranged so as to be in sliding contact with the power supply line 18 laid on the side surface of the guide rail 2, and is connected to the electric motor 12 and other control equipment. Supplies power voltage, etc. The guide rail 2 is mounted at a constant height by rail mounting stands 19 provided at a plurality of locations.

The horizontal support 3 is integrally connected to the lower end of the vertical support frame 20 and forms an L-shaped support frame 21 together with the vertical support frame 20.
It is installed at a low position close to the floor F. Further, between the vertical support frame 20 of the L-shaped support frame 21 and the vertical frame portion 8a of the machine frame 8 in the transport vehicle 1, there is provided a turning mechanism for rotating the horizontal support stand 3 around the vertical axis Y. A driving means 22 is provided. As the turning drive means 22, in addition to an electric type, an air drive type or a mechanical drive type can be selected and adopted as appropriate. In the case of electric method, direct drive motor, AC
A servo motor (including a pulse motor), a geared motor with a brake, etc. can be used, and as an air drive system, for example, a high rotor system, and as a mechanical drive system, a guide roller system including a Geneva system can be used.

The turntable 4 is driven by a rotation drive means 23 provided on the horizontal support base 3, and the rotation drive means 23, like the rotation drive means 22, is an electric type, An air drive system or a mechanical drive system can be adopted as appropriate, and in the case of an electric system, a direct drive motor, an AC servo motor, a geared motor with a brake, etc. can be used.

In using the engine assembly carrier having the above-mentioned configuration, as shown in FIG. The carriage 1 is moved along the guide rail 2 to, for example, a head assembly station while being supported by the attachment 5B and a predetermined clamp (not shown), and the cylinder head CH is assembled there. In this case, since the horizontal support stand 3 is at a low position close to the floor surface F, even if the height of the cylinder block CB itself is considerably high, the cylinders supported on the turntable 4 from this floor surface F are The height to the top of the block CB is significantly lower than in the case of a conventional carrier, and therefore the work of assembling the cylinder head CH becomes much easier.

When, for example, a manifold is to be assembled to a desired side surface of the cylinder block CB supported on the turntable 4, the rotation drive means 23 is actuated to move the manifold assembly location of the cylinder block CB into place. The turntable 4 is appropriately rotated so as to face the worker, and the work is performed. In this case, unlike conventional transport vehicles, there is no transport vehicle near the worker's feet, and only the horizontal support platform 3 extending laterally from the transport vehicle 1 exists, so the worker and cylinder block The distance between the CB and the side surface is shortened, and therefore the manifold assembly work becomes easier.

Next, as described above, the cylinder head C
When assembling the oil pan OP to the cylinder block CB to which H has been assembled, first remove the cylinder block CB from the horizontal support stand 3 of the transport vehicle, and then move the horizontal support stand 3 horizontally using the swing drive means 22. 180 around axis Y
3, and the cylinder head support attachment 5A, which had been in a downward position on the lower surface of the horizontal support base 3 (see FIG. 1), is brought into an upward position as shown in FIG. Then, the cylinder block CB is turned upside down, and the cylinder head CH, which has already been assembled to the cylinder block CB, is clamped (
(not shown), and in this state, the oil pan OP is assembled to the cylinder block CB.

The engine assembly transport vehicle shown in FIGS. 1 and 3 has a horizontal support base 3 that can be rotated and rotated around a vertical axis X and a horizontal axis Y, respectively. , an engine assembly in which the horizontal support stand 3 can rotate and pivot around the vertical axis X and the horizontal axis Y as described above, and in addition, the horizontal support stand 3 can move up and down in the vertical direction with respect to the transport vehicle 1. The figure shows a transportation vehicle.

That is, a turning drive means 22 for driving the horizontal support stand 3 to turn around the horizontal axis Y is interposed between the vertical support frame 20 of the L-shaped support frame 21 and the lifting frame 24, and The frame 24 can be raised and lowered by a raising and lowering drive mechanism 25. This elevating drive mechanism 25 includes a rotary drive means 26 provided on the upper part of the machine frame 8, a vertically extending ball screw shaft 27 rotated by the rotary drive means 26, and the elevating frame 24.
The lift block 24a is attached to the ball screw shaft 27, and is guided and supported in a non-rotatable manner by a guide member (not shown) provided on the machine frame 8 side. The rotation of the ball screw shaft 27 caused by the drive of the vertical support frame 26 causes the elevating frame 24 to move up and down, and therefore the horizontal support stand 3 to move up and down. The rotation drive means 26 of the lifting drive mechanism 25 may be an electric drive means such as a servo motor (including a pulse motor) or a motor with a brake using an inverter control method, or an air drive rotation drive means such as an air motor with a brake. Can be used.

Furthermore, as the elevating mechanism 25, instead of a mechanism consisting of a combination of a rotary motion mechanism and a linear motion mechanism as described above, an independent linear motion mechanism such as an air cylinder with a brake may be adopted. .

As described above, according to the engine assembly transport vehicle shown in FIG. 4, the horizontal support table 3 can be raised and lowered by the lifting mechanism 25, so that the height of the worker assembling the engine or the height of the engine assembly position can be adjusted. The horizontal support base 3 can be raised or lowered as desired, so that work can always be performed at a desired work position. In this FIG. 4, the state in which the horizontal support base 3 is raised to the highest level is shown by a virtual line.

In the embodiment described above, FIGS.
As shown in FIG. 4, only the attachment 5B is provided on the top surface of the turntable 4, and only the attachment 5A is provided on the bottom surface of the horizontal support base 3. Two types of attachments may be arranged side by side on each lower surface.

[0019]

According to the engine assembly carrier of the present invention, the horizontal support platform on which the engine to be assembled is mounted is horizontally extended from the monorail-type carrier to the side and cantilevered with respect to the carrier. Since it is supported in a shape, the working position can be lowered sufficiently, and
The facing distance between the engine on the horizontal support stand and the operator can be shortened. Therefore, the work becomes very easy to perform, and work efficiency can be greatly improved.

[0020] Moreover, in this transport vehicle, attachments for attaching the engine are provided on the upper and lower sides of the horizontal support, respectively, so that, for example, on an assembly line for the engine body, the position for assembling the cylinder block to the cylinder head and If the oil pan is located vertically opposite to the cylinder block, one of the attachments on both the top and bottom sides of the horizontal support should be used to support the lower part of the cylinder block, and the other attachment should be used to support the cylinder head. It can be done. Therefore, by appropriately reversing the horizontal support base, two types of parts can be assembled at different vertically.
It can be assembled using the same carrier without changing the carrier.

Further, according to the engine assembly transport vehicle of the present invention, a turntable rotatable around a vertical axis is provided on the horizontal support, and an engine support attachment on the upper surface of the horizontal support is mounted on the turntable. By providing this, the engine supported on the turntable can be rotated as appropriate, and therefore it is possible to always work close to the operator.

Furthermore, according to the engine assembly conveyance vehicle of the present invention, the horizontal support base is supported so as to be movable up and down relative to the conveyance vehicle. The working position can be set arbitrarily, thereby further improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a front view of an engine assembly vehicle according to the present invention.

FIG. 2 is a front view showing a state in which the horizontal support base of the carrier vehicle is inverted.

FIG. 3 is a side view of the carrier shown in FIG. 1;

FIG. 4 is a front view of another engine assembly vehicle according to the present invention.

[Explanation of symbols]

1 Transport vehicle 2 Guide rail 3 Horizontal support base 4 Turntable 5A Engine support attachment 5B Engine support attachment 22 Turning drive means 23 Rotation drive means 25 Lifting drive mechanism

Claims (3)

[Claims] Claim 1: A monorail-type transport vehicle that runs on its own along a guide rail, and a monorail-type transport vehicle that extends horizontally from the transport vehicle and is supported in a cantilever manner with respect to the transport vehicle, and that rotates around a horizontal axis. What is claimed is: 1. A transport vehicle for engine assembly, comprising: a horizontal support base rotatably supported on the horizontal support base; and engine support attachments provided on the upper and lower sides of the horizontal support base, respectively. 2. The engine according to claim 1, wherein a turntable rotatable around a vertical axis is provided on the horizontal support, and an attachment for supporting the engine on the upper surface of the horizontal support is provided on the turntable. Transport vehicle for assembly. 3. The engine assembly transport vehicle according to claim 1, wherein the horizontal support base is supported so as to be movable up and down relative to the transport vehicle.