JPH0321885Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a cylinder block type discriminating device for discriminating the type of cylinder block of an engine.

(Prior art) In an engine assembly factory, etc., when a variety of cylinder blocks are passed onto a common conveyor assembly line and parts are assembled according to the type of cylinder block, the type of cylinder block is automatically determined. It is necessary to display the data or output it to automatic assembly equipment.

The height of the cylinder block varies depending on the model, and even if the height is the same, the cylinder bore diameter differs, so the type can be determined by detecting the height and bore diameter of the cylinder block.

By the way, in conventional cylinder block type discrimination devices, the height of the cylinder block is detected by a height measurement unit, the bore diameter is detected by a bore diameter measurement unit independent of the height measurement unit, and both measurement units are used to detect the height of the cylinder block. The type of cylinder block was determined from the combination of ON and OFF signals.

In this way, if the height measurement unit and bore diameter measurement unit are made into independent units, each must be equipped with a movement detector such as a linear scale, so the manufacturing cost increases as the number of detector parts increases. It has the disadvantage of being expensive.

(Purpose of the invention) The present invention has been made to eliminate the above-mentioned drawbacks, and is to provide a cylinder block type discrimination device that can detect the height and bore diameter of the cylinder block using a common travel amount detector. The purpose is to provide.

(Structure of the invention) The cylinder block type discrimination device of the invention is as follows:
In a device that detects the height and cylinder bore diameter of an engine's cylinder block and determines the type of cylinder block based on the height and bore diameter, the first lifting/lowering a height detection rod that is raised and lowered by a means for detecting the height; and a bore diameter detector that is raised and lowered by a second raising and lowering means that is fixed to the height detection rod via a connecting member, and that is coaxial and corresponds to various cylinder bore diameters. A bore diameter detection tool having a plurality of bore diameter detection fitting portions formed in the height detection rod detects the amount of descent from an initial position of the height detection rod and the amount of descent of the bore diameter detection device from a predetermined reference position. It is equipped with a descending amount detector, and a control device for determining the type of cylinder block by receiving the descending amount detection signal of the height detection rod and the descending amount detection signal of the bore diameter detector from the descending amount detector. It is something.

In the above configuration, when the height detection rod is first lowered by the first elevating means, the second height detection rod integrally connected to the height detection rod via the connecting member is
As the lifting means lowers integrally, the bore diameter detector also lowers integrally, so a descending amount detection signal of the height detecting rod is output from the descending amount detector and the initial position of the height detecting rod is detected. The amount of descent from In this way, the height of the cylinder block is detected from the amount of descent of the height detection rod until it comes into contact with the top surface of the cylinder block.

After the height detection rod is brought into contact with the top surface of the cylinder block, when the bore diameter detection tool is lowered by the second lifting means, the corresponding bore diameter detection fitting part is fitted into the cylinder bore of the cylinder block. The bore diameter detection tool descends until the bore diameter detection tool reaches the same position, and the descending amount detector outputs a descending amount detection signal of the bore diameter detection tool to detect the amount of descent of the bore diameter detection tool from a predetermined reference position. In this way, the cylinder bore diameter is detected from the amount of descent of the bore diameter detector.

In the control device, the height of the cylinder block is determined based on the detection signal of the descending amount of the height detection rod from the descending amount detector, and the bore diameter is determined based on the descending amount detection signal of the bore diameter detector. The type of cylinder block is determined based on the combination of the height and bore diameter of the cylinder block.

(Effects of the invention) As explained above, the present invention provides a height detection rod that is raised and lowered by the first elevating means, and a second height detection rod that is fixed to the height detection rod via a connecting member.
A bore diameter detector is provided which is raised and lowered by a lifting means, and a descending amount detector is provided to detect the amount of descent of the height detection rod from the initial position and the amount of descent of the bore diameter detector from a predetermined reference position. A control device is installed that determines the type of cylinder block by receiving the detection signal of the descending amount of the height detection rod and the descending amount detection signal of the bore diameter detector from the height detector. Since the height and bore diameter of the cylinder block can be determined and the type of cylinder block can be determined based on the detection signal of Become.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In FIG. 1, a cylinder block type discrimination device M (hereinafter referred to as type discrimination device M) detects the height and cylinder bore diameter of a cylinder block 1 of an engine assembled at an engine assembly factory to discriminate the type of cylinder block 1. The cylinder block 1 is connected to the oil pan 2 and supported on the standard pallet 3 by four supports 4 so that the lower surface 5 of the cylinder block 1 becomes the reference surface. The cylinder is loaded and conveyed in the direction of the arrow, but when it reaches the discrimination stage where the type discrimination device M is installed, the reference cylinder bore 6 is placed in a fixed position so that it is located concentrically directly below the bore diameter detector 11 of the type discrimination device M. be done.

By the way, in this embodiment, the cylinder blocks 1 to be discriminated by the type discriminating device M are classified into four types according to the height of the cylinder blocks 1: A type, B type, C type, and D type, as shown in FIG. However, D
There are three types of cylinder bore 6, D1 type and D2 type.
There are 6 types of cylinder blocks in total.The height of the cylinder block is A type > B type > C type > D type>, and the cylinder bore diameter is D1 type < D2 type < D3. It shall be of type.

The type discrimination device M is configured as follows.

In other words, the beam portion 7 of the frame 7 is erected on the floor.
a extends above the cylinder block 1, and a first air cylinder 8 is provided at the tip of the beam portion 7a.
(first elevating means) is installed in an inverted manner, and its piston rod 8a extends downward through the insertion hole of the beam portion 7a, and a height detection rod 9 is fixed to the lower end of the piston rod 8a. A circular plate 9a having a diameter larger than the largest cylinder bore 6 is fixed horizontally to the lower end of the height detection rod 9.

Further, in order to interlock and connect the second air cylinder 10 (second elevating means) and the bore detector 11 to the piston rod 8a, the piston rod 8 is attached near one end of the horizontal connecting plate 12 below the beam portion 7a.
a is inserted, this connecting plate 12 is fixed to the piston rod 8a and the height detection rod 9, and a second air cylinder 1 is attached to the upper surface of the connecting plate 12 near the other end.
0 is fixed in an inverted shape, and its piston rod 10
The piston rod 10a extends downward through an insertion hole formed in the connecting plate 12, and a bore diameter detector 11 is fixed coaxially to the lower end of the piston rod 10a.

The bore diameter detection tool 11 is of the D1 type and D2 type mentioned above.
Type, D3 type cylinder block 1d1, 1d2, 1
It has a first fitting part 11a, a second fitting part 11b, and a third fitting part 11c that fit into the cylinder bore 6 of d3, respectively.
The fitting part 11b and the third fitting part 11c having the largest diameter are formed in the shape of coaxial shafts with different diameters in order from the bottom.
The annular lower end surface of the fitting part 11b and the third fitting part 11
The annular lower end surface of c is formed as a horizontal locking surface, and the annular lower end surface of the collar portion 11d provided on the upper side of the third fitting portion 11c is also formed as a horizontal locking surface.

Furthermore, when the piston rods of the first air cylinder 8 and the second air cylinder 10 are contracted, the lower end surface of the bore diameter detector 11 is located higher than the lower surface of the circular plate 9a of the height detection rod. It's becoming like that.

In order to detect the amount of descent of the height detection rod 9 and the bore diameter detection tool 11, the linear scale mover 1 is
3a and a linear scale stator 13b, the falling amount detector 13 is provided as follows.

That is, the linear scale mover 13a is fixed vertically to the tip of the support arm 14 extending from the bore diameter detector 11, and the linear scale stator 13b is attached to the column member 7b of the frame 7 so as to face the linear scale mover 13a. It is attached to the side surface, and its detection signal is output to the control device 14 (see FIG. 2).

As shown in FIG. 3, the control device 14 includes a counter 15, a first comparator 16, and a second comparator 1.
7. Third comparator 18, fourth comparator 19, 41st comparator 20, 42nd comparator 21, 43rd comparator 22, reference value setter 23, output circuit 24, and valve drive circuit 25
The valve drive circuit 25 includes a first solenoid valve 26 that switches the air supply path to the first air cylinder 8.
and a second switching valve 27 that switches the air supply path to the second air cylinder 10.

The reference value setter 23 includes each comparator 16 to 22.
The reference value is digitally set for the A type and B type from the lower end surface of the height detection rod 9 when the height detection rod 9 is raised to the initial position.
Type/C type/D type cylinder block 1a, 1b, 1
The heights to the top surfaces of c and 1d are respectively set in the first comparator 16, the FIG. The first fitting part 11a and the second fitting part 11b of the bore diameter detection tool 10 are based on the rod 9.
and the third fitting portion 11c is a D1 type cylinder block 1d1, a D2 type cylinder block 1d2, and a third fitting portion 11c, respectively.
Cylinder bore 6 of D3 type cylinder block 1d3
The descending distance until mating with the 41st comparator 2
0 in the 42nd comparator 21 and the 43rd comparator 22.

The counter 15 is a linear scale stator 13
It receives a detection signal from b, counts it, and outputs the count signal to each comparator 16 to 19.
The fourth comparator 19 outputs the signal to the 41st comparator 20, the 42nd comparator 21, and the 43rd comparator 22, and each of the comparators 16 to 22 outputs the signal to the output circuit 24.

The output circuit 24 outputs an output to the valve drive circuit 25, and also determines the type of cylinder block 1 according to the combination of outputs from the comparators 16 to 22.
The determination signal is outputted to the display 28 or the automatic assembly device.

Next, the cylinder block type discrimination device M
The operation of this will be explained.

First, a start signal from the output circuit 24 is output to the valve drive circuit 25, and the first solenoid valve 26 is opened.The first air cylinder 8 starts operating and the height detection rod 9 descends from its initial position. Begin to. At this time, since the bore diameter detector 11 also moves down in conjunction with the height detection rod 9, a detection signal is output from the linear scale stator 13b to the counter 15.

In the case of the A type cylinder block 1a, it is output from the first comparator 16;
In the case of C type cylinder block 1c, it is output from the first, second and third comparators 16, 17, 18, and in the case of C type cylinder block 1c, it is output from the D type output block. In the case of 1d, the first,
Second, third and fourth comparators 16, 17, 18, 1
Output from 9.

When the cylinder block falls under any one of the A-type, B-type, and C-type cylinder blocks 1a, 1b, and 1c, there is no need to detect the cylinder bore diameter, so the second air cylinder 10 is not operated, and the output circuit 2
The first solenoid valve 26 is switched by the signal from the first air cylinder 8, and the first air cylinder 8 is returned to its original state.

On the other hand, when it corresponds to the D-type cylinder block 1d, it is necessary to detect the cylinder bore diameter, so the output is output from the output circuit 24 to the valve drive circuit 25, the second solenoid valve 27 is opened, and the second air cylinder 10 is activated, and the bore diameter detection tool 11 is further lowered.

In the case of the D1 type cylinder block 1d1, the first fitting part 11a of the bore diameter detection tool 11 only fits into the cylinder bore 6 and does not descend any further.
First, second, third and fourth comparators 16, 17, 1
8, 19 and the 41st comparator 20
is output from.

Similarly to the above, in the case of the D2 type cylinder block 1d2, the output is also output from the 42nd comparator 21, and in the case of the D3 type cylinder block 1d3, the output is also output from the 43rd comparator 21.
It is also output from 2.

As described above, the type of cylinder block 1 is determined based on the combination of outputs from the comparators 16 to 22,
A determination signal is outputted from the output circuit 24 as described above. After the determination is completed, the first solenoid valve 26 and the second solenoid valve 27 are switched based on the output from the output circuit 24, and the height detection rod 9 and the bore diameter detection tool 1 are switched.
1 will return to its initial position.

Next, the determination and control procedures performed by the control device 14 will be explained with reference to the schematic flowchart shown in FIG.

Incidentally, in the figure, S1 to S16 indicate each step.

After a start in S1, the height detection rod 9 is lowered in S2, and the amount of descent of the height detection rod 9 is detected in S3.

In S4, it is determined from the amount of descent whether or not it is a D-type cylinder block 1d. If it is a D-type cylinder block 1d, the bore diameter detector 11 is operated to descend in S5, and the amount of descent is detected in S6.

In S7, it is determined whether or not the D1 type cylinder block 1d1 is selected.
If so, the process moves to S13 and a determination signal is output; otherwise, the process moves to S8, where it is determined whether or not the cylinder block 1d2 is detected.
If it is the type cylinder block 1d2, the process moves to S13, otherwise it is determined in S9 that it is the D3 type cylinder block 1d3, and the process moves from S9 to S13.

On the other hand, in S4, the D type cylinder block 1d
If it is determined that the
In this step, it is determined whether or not it is a C-type cylinder bearing 1c. If it is a C-type cylinder block 1c, the process moves to S13; otherwise, the process moves to S11.

In S11, it is determined whether or not it is the B-type cylinder block 1b. If it is the B-type cylinder block 1b, the process moves to S13; otherwise, it moves to S12.
Shift to A type cylinder block 1a at S12.
It is determined that this is the case, and the process moves from S12 to S13.

After outputting the discrimination signal in S13, the bore diameter detection tool 11 is raised if necessary in S14, the height detection rod 9 is raised in S15, and the cylinder block discrimination 1 is carried out in S16.
The cycle ends.

Incidentally, as shown in FIG. 4, the reference value setter, comparator, and output circuit of the control device may be constructed of a central processing unit (MPU), ROM, and RAM.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a perspective view of cylinder blocks placed on a standard pallet and a cylinder block type discriminating device, Fig. 2 is a schematic perspective view of various cylinder blocks, and Fig. 3 is a perspective view of a cylinder block type discriminator. The figure is a block diagram showing the overall configuration of the cylinder block type discrimination device, FIG. 4 is a block diagram of a modified example of the control device, and FIG. 5 is a schematic flowchart showing the control and discrimination procedure performed by the control device. . DESCRIPTION OF SYMBOLS 1... Cylinder block, 6... Cylinder bore, 8... First air cylinder, 9... Height detection rod, 10... Second air cylinder, 11... Bore diameter detector, 11a... First fitting Gobe, 11b...
Second fitting part, 11c...Third fitting part, 12...Connecting plate, 13...Descent amount detector, 13a...Linear scale mover, 13b...Linear scale stator, 14...Control device .

Claims (1)

[Claim for Utility Model Registration] In a device that detects the height and cylinder bore diameter of an engine cylinder block and determines the type of cylinder block from the height and bore diameter, the cylinder block is placed at a fixed position. A height detection rod that is raised and lowered with respect to the upper surface by a first lifting means, and a bore diameter detection tool that is raised and lowered by a second lifting means that is fixed to the height detection rod via a connecting member. A bore diameter detection tool having a plurality of coaxially formed bore diameter detection fitting parts corresponding to various cylinder bore diameters, the amount of descent of a height detection rod from an initial position, and a predetermined reference position of the bore diameter detection tool. A descending amount detector detects the descending amount from the cylinder block, and a descending amount detection signal of the height detection rod from the descending amount detector and a descending amount detection signal of the bore diameter detector are received to determine the type of cylinder block. 1. A cylinder block type discriminating device comprising: a control device for determining the type of cylinder block;