JP2883184B2 - Engine assembly apparatus and method - Google Patents

Description

The present invention relates to an engine assembling apparatus and an assembling method.

2. Description of the Related Art An engine assembling apparatus and an assembling method for automatically assembling a cylinder head to a cylinder block carried into an assembling station by a conveyor are conventionally known. In the method, it is difficult to accurately assemble the cylinder head at a predetermined position on the cylinder block. For this reason, in the conventional engine assembling apparatus or assembling method, an assembly failure may occur. When such an assembly failure occurs, the conveyor is temporarily stopped and the repair of the assembly failure is manually performed. I needed to do it.

In order to improve this, an assembling failure detecting means for detecting an assembling failure of the assembly is provided, and when an assembling failure of the assembly is detected, a by-pass conveyor that bypasses the assembly to the main conveyor is used. There has been proposed an engine assembling apparatus in which the assembly is sent to a rework station, where the assembling defect is reworked, and then returned to the main conveyor (for example, see Japanese Patent Application Laid-Open No. 62-218030). The engine assembling apparatus having such a reworking station has an advantage that it is not necessary to stop the main conveyer even when an assembling failure occurs, thus improving the productivity.

[Problems to be Solved by the Invention] However, in a conventional engine assembling apparatus including a bypass conveyor and a rework station as disclosed in Japanese Patent Application Laid-Open No. 62-218030, the construction cost of production equipment is large. However, since the occurrence of defective assembly itself is not reduced, it is difficult to say that the number of work steps is not substantially reduced and the productivity is sufficiently improved.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide an engine assembling apparatus or an assembling method capable of accurately assembling a cylinder head at a predetermined position on a cylinder block. Aim.

Means for Solving the Problems In order to achieve the above object, a first invention is a cylinder block positioning means including a positioning member that is inserted into a reference hole provided in a cylinder block to position the cylinder block. A guide member provided integrally with the positioning means and having a guide hole formed therein, and a cylinder head assembling means provided with a guide pin inserted into the guide hole for positioning the cylinder head. An engine assembling apparatus is provided.

A second invention provides an engine assembling apparatus according to the first invention, wherein the engine is a V-type engine.

According to a third aspect of the present invention, a positioning member provided in the cylinder block positioning means is inserted into a reference hole of the cylinder block to perform positioning of the cylinder block, and the cylinder head assembling means having guide pins grips the cylinder head. With the lower surface of the cylinder head held parallel to the mating surface with the cylinder block,
An engine assembling method is provided wherein the cylinder head is inserted into a guide hole of a guide member formed integrally with the cylinder block positioning means, and the cylinder head is assembled at a predetermined position on the cylinder block.

According to the first invention, the cylinder block is positioned by inserting the positioning member of the cylinder block positioning means into the reference hole, while the cylinder head is
The positioning is performed by inserting the guide pins of the cylinder head assembling means holding the cylinder head into the guide holes of the guide member formed integrally with the cylinder block positioning means. Therefore, the cylinder block and the cylinder head are both positioned with reference to the cylinder block positioning means. For this reason,
The assembly error that occurs between the cylinder block and the cylinder head is caused by the assembly error between the cylinder block positioning means and the cylinder block, that is, the clearance between the reference hole and the positioning member, and the cylinder block positioning means and the cylinder head. , Ie, the clearance between the guide hole and the guide pin. Here, if both clearances are set sufficiently small, the assembly error of the cylinder head with respect to the cylinder block can be greatly reduced, and the occurrence of assembly failure can be prevented. Therefore, the productivity of the engine can be improved without substantially increasing the equipment cost.

According to the second aspect, the same operation and effect as those of the first aspect can be obtained. Further, in a V-type engine, in which two cylinder heads are assembled to one cylinder block, in which assembly failures have been particularly frequent, occurrence of assembly failures is prevented. It gets even bigger.

According to the third invention, while the cylinder block is positioned by inserting the positioning member of the cylinder block positioning means into the reference hole, the guide hole of the guide member integrally formed with the cylinder block positioning means is provided.
The cylinder head is positioned by inserting the guide pins of the cylinder head assembling means holding the cylinder head. Therefore, both the cylinder block and the cylinder head are positioned with reference to the cylinder block positioning means. Therefore, the first
In the same manner as in the invention, the assembly error generated between the cylinder block and the cylinder head is only the clearance between the reference hole and the positioning member and the clearance between the guide hole and the guide pin, and The assembly error of the cylinder head with respect to the block is greatly reduced, and the occurrence of assembly failure is prevented.

[Examples] Examples of the present invention will be specifically described below.

As shown in the attached drawings, the engine assembling apparatus SH includes one bank (the right bank in the drawing) of the cylinder block 2 for the V-type engine carried into the assembly station A by the main conveyor 1, and this bank is hereinafter referred to as a right bank. ) With a cylinder head 4 carried in by the cylinder head transport means 3.

The engine assembly device SH has a base 5 as its skeleton.
And a column 6 attached to the base 5 and extending in the vertical direction, and a beam 7 attached to the upper end of the column 6 and extending in the horizontal direction.

On the base 5, a support 11 for supporting the cylinder head transport means 3 is provided. At the end of the support base 11 on the side of the assembly station (the left end in the drawing), a cylinder block position detecting means 12 for detecting whether or not the cylinder block 2 is carried in at a predetermined position of the assembly station A.
Is provided. In the following, for convenience, the assembly station side is referred to as “left” when viewed in the arrangement direction of the assembly station A and the cylinder head transport means 3 (in the left-right direction in the drawing),
The cylinder head conveying means side is referred to as “right”.

Above the assembly station A, the beam 7 is provided with cylinder block positioning means 15. The cylinder block positioning means 15 is provided with a drive unit 16 for freely moving it up and down or horizontally, and a lower end of the drive unit 16 is provided with a plate unit 17 having a horizontally expanding surface. . The reference hole of the cylinder block 2 is formed on the lower surface of the plate portion 17 as described later.
A positioning member 18 that is inserted into the cylinder block 20 and positions the cylinder block 2 is provided so as to protrude vertically downward. A guide member 21 having a divergent surface parallel to the cylinder head mounting surface 2a of the right bank of the cylinder block 2 is integrally formed at the right end of the plate portion 17, and the guide member 21 is orthogonal to the divergent surface. As a result, a guide hole 22 that penetrates this in the thickness direction, that is, penetrates in a direction perpendicular to the cylinder head mounting surface 2a is formed.

Above the cylinder head transport means 3, the beam member 7 is provided with a cylinder head assembling means 25. The cylinder head assembling means 25 is provided with a driving means 26 for moving the cylinder head vertically or horizontally. The cylinder head assembling means 25 is provided with a rotating means 27 for rotating the cylinder head around the shaft 24 and a rotation angle switch 33 for stopping the rotation at a predetermined rotation angle. Further, when the cylinder head 4 on the cylinder head conveying means 3 is gripped, the cylinder head 4 is centered on the main body 30 attached to the lower side of the driving means 26. , A centering pin 28 to be set at a predetermined position, a guide pin 29 to be inserted into the guide hole 22 when the cylinder head 4 is assembled to the cylinder block 2 and a cylinder block 4 Pair of gripping members
31a and 31b are provided. Note that the claw members 32 engaging with the cylinder head 4 are respectively provided at the distal ends of the grip members 31a and 31b.
a, 32a are attached. Further, the support portion 6 is provided with a cylinder head position detecting means 35 for detecting whether or not the cylinder head 4 is held at a correct position.

Hereinafter, a method for assembling the cylinder head 4 to the cylinder block 2 by the engine assembling apparatus SH, that is, a method for assembling the engine will be described.

The cylinder block 2 is carried into the assembly station A by the main conveyor 1.

If the cylinder block position detecting means 12 detects that the cylinder block 2 is carried in the correct position, the cylinder block positioning means 15 is lowered to the position indicated by the imaginary line, and the positioning member 18 is moved to the position of the cylinder block 2. The cylinder block 2 is positioned by inserting it into the reference hole 20 formed on the upper surface. Here, the clearance between the positioning member 18 and the reference hole 20 is set sufficiently small, so that the positioning accuracy of the cylinder block 2 is sufficiently enhanced.

After lowering the main body 30 of the cylinder head assembling means 25 to a position where it can engage with the cylinder head 4a on the cylinder head conveying means 3, the centering means 28 is brought into contact with a predetermined position of the cylinder head 4. Then, the position of the main body 30 is finely adjusted, and the main body 30 is arranged at a correct position with respect to the cylinder head 4a (centering).

The claw portions 32a, 32b of the pair of gripping members 31a, 31b are engaged with the cylinder head 4a, and the upper end portion of the cylinder head 4 is sandwiched between the claw portions 32a, 32b and the lower surface 30 of the main body portion. After the grip, the body 30 is raised to raise the cylinder head 4 to the position indicated by 4b.

If the cylinder head position detecting means 35 detects that the cylinder head 4 is lifted to a predetermined position, the rotating means 27 rotates the cylinder head assembling means 25 clockwise, and the main body 30 The rotation is stopped when the rotation angle switch 33 is contacted. Here, the rotation angle switch 33 stops rotating at a position where the lower surface of the cylinder head 4 gripped by the cylinder head assembling means 25 is parallel to the cylinder head mounting surface 2a of the right bank of the cylinder block 2. It is set to let.

The main body 30 is lowered obliquely downward along a straight line 1 perpendicular to the cylinder head mounting surface 2a, and the lower surface of the cylinder head 4 is moved downward while the guide pins 29 are inserted into the guide holes 22 of the guide member 21. And the cylinder head 4 is assembled to the cylinder block 2. Here, since the cylinder head lower surface 4 is held so as to be always parallel to the cylinder head mounting surface 2a, the cylinder head 4 can be smoothly assembled on the cylinder block 2.

In the above assembling operation, the positioning of the cylinder block 2 is performed by inserting the positioning member 18 of the cylinder block positioning means 15 into the reference hole 20.
By inserting the guide pin 29 of the cylinder head assembling means 25 into the guide hole 22 of the guide member 21 formed integrally with the cylinder block positioning means 15, the cylinder head 4
Is performed. Therefore, both the cylinder block 2 and the cylinder head 4 are positioned with reference to the cylinder block positioning means 15. For this reason,
As described above, the assembly error generated between the cylinder block 2 and the cylinder head 4 is determined by the positioning member 18 and the reference hole.
Clearance between 20 and guide pin 29 and guide hole
Since it is only the clearance between the cylinder block 22 and the cylinder head 2, the assembly error of the cylinder head 4 with respect to the cylinder block 2 can be greatly reduced, and the occurrence of assembly failure can be prevented.

Although not shown, another engine assembling apparatus having the same configuration as the engine assembling apparatus SH is provided downstream of the main conveyor 1. Then, with the engine assembly device SH shown in the drawing, the cylinder head 4 is provided in the right bank.
The cylinder block 2 on which is mounted is transported to another engine assembling apparatus after the posture in the front-rear direction is reversed by 180 degrees. For this reason, in another engine assembling apparatus, the cylinder head is assembled to the left bank of the cylinder block 2.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are elevational views of an engine assembling apparatus showing an embodiment of the present invention. SH: Engine assembly equipment, A: Assembly station, 2
…… Cylinder block, 2a …… Cylinder head mounting surface,
4 ... cylinder head, 15 ... cylinder block positioning means, 17 ... plate part, 18 ... positioning member, 21 ...
... guide member, 22 ... guide hole, 25 ... cylinder head assembling means, 29 ... guide pin, 30 ... body part.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-62622 (JP, A) JP-A-1-178091 (JP, A) JP-A-62-218030 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) B23P 19/00 301 B23P 19/04 B23P 21/00 303 B23P 19/02

Claims (3)

(57) [Claims] 1. A cylinder block positioning means having a positioning member inserted into a reference hole provided in a cylinder block for positioning the cylinder block, and a guide provided integrally with the positioning means and having a guide hole formed therein. An engine assembling apparatus, comprising: a member; and a cylinder head assembling means having a guide pin inserted into the guide hole for positioning the cylinder head. 2. The engine assembling apparatus according to claim 1, wherein the engine is a V-type engine. 3. The cylinder block is positioned by inserting a positioning member provided in the cylinder block positioning means into a reference hole of the cylinder block, and the cylinder head assembling means having guide pins is used to hold the cylinder head. With the lower surface of the head held parallel to the mating surface with the cylinder block, insert the guide pin into the guide hole of the guide member formed integrally with the cylinder block positioning means, and place the cylinder head on the cylinder block. An assembling method for an engine, wherein the engine is assembled at a predetermined position.