JP2010094775A - Device and method for gripping cylinder head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylinder head gripping technique suitable for gripping different kinds of cylinder heads. <P>SOLUTION: A cylinder head gripping device 10 is a bar inserted into a plug hole 27 as an oblique hole (refer to Fig.1), and includes support bars 32 and 32 divided so that a distal end 31 can be expandingly opened; an opening/closing rod 33 for expandingly opening the support bars 32 and 32; an opening/closing rod driving source 34 for advancing and retracting the opening/closing rod 33; a support member 35; and a control section 21 (refer to Fig.1) for carrying out a series of controls in which the support bars 32 and 32 are opened to grip the cylinder head 15, the cylinder head 15 is moved and held down by a hold-down member 24, the opening/closing rod 33 is retracted, and the support bars 32 and 32 are closed and drawn out of the cylinder head 15. Owing to a small number of components, a small simple structure is achieved, thereby reducing the load exerted on a robot. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cylinder head gripping technique during an operation of assembling a cylinder head having a plurality of oblique holes to a cylinder block.

2. Description of the Related Art Conventionally, in assembly of an engine, a cylinder head gripping device that grips and transfers a cylinder head with a gripping member has been put to practical use (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 10-24876 (FIG. 5)

Patent document 1 is demonstrated based on the following figure.
FIG. 11 is a diagram for explaining the basic principle of the conventional technique. The first cylinder 101 is operated to move the cylinder head gripping device 102 onto the cylinder head 103. The second cylinder 104 is operated to lower the cylinder head gripping device 102 to the position of the cylinder head 103. The third cylinder 105 is operated, and the gripping claws 106 and 106 are rotated about the rotation shafts 107 and 107 to perform the closing operation. As a result, the end portions 108 and 108 of the cylinder head 103 can be gripped by the gripping claws 106 and 106 from the side.

  However, in recent years, the number of cylinder head 103 models has increased along with changes in environmental friendliness and fuel efficiency technology. To cope with this, a large number of cylinder head gripping devices 102 that match each model are prepared. There is a need. Furthermore, in order to prevent displacement and dropping of the cylinder head 103 during transfer, it is necessary to provide a locking pin or the like. That is, it is not suitable for gripping cylinder heads of different types.

  It is an object of the present invention to provide a cylinder head gripping technique suitable for gripping different types of cylinder heads.

  The invention according to claim 1 is a cylinder head gripping device for gripping a cylinder head of an engine having a plurality of slant holes, and is a bar inserted into the slant hole, and a tip can be expanded. A support bar that is divided in such a manner, an open / close rod that expands the support bar when inserted into the support bar and moves forward, an open / close rod drive source that moves the open / close rod back and forth, and the open / close rod provided on the robot arm. A rod drive source and a support member that supports the support bar. The support bar is operated by opening the support bar inserted into the cylinder head by operating the open / close rod drive source and tilting the cylinder head forward. The cylinder head is gripped by applying a load of the cylinder head to the cylinder head, the cylinder head is moved onto the cylinder block, and the cylinder The head is placed on the cylinder block, closing the support bar retracting the closing rod, and wherein the extracting the support bar from the cylinder head.

  In the invention according to claim 2, the cylinder head gripping device swings the cylinder head so as to face the camera provided in the vicinity of the robot until the cylinder head moves onto the cylinder block. It is characterized by inspecting the attached parts.

  The invention according to claim 3 includes an inspection mechanism for inspecting whether or not a predetermined part is attached to the cylinder block.

  The invention according to claim 4 is characterized in that the oblique hole is a plug hole into which a spark plug of an engine is inserted.

  The invention according to claim 5 is characterized in that after the cylinder head is placed on the cylinder block, the cylinder head placed on the cylinder block is pressed by a pressing member, and the support bar is removed from the cylinder head.

  The invention according to claim 6 is a cylinder head gripping method for gripping a cylinder head of an engine having a plurality of slant holes, and is divided so that the tip can be expanded in the slant holes. A support bar inserting step of inserting a support bar; a support bar expanding step of expanding the support bar by advancing an opening / closing rod inserted into the inserted support bar; and the cylinder by the expanded support bar A gripping step of gripping the cylinder head by tilting the head forward and applying a load of the cylinder head to the support bar, a cylinder head moving step of moving the gripped cylinder head onto the cylinder block, and a moved cylinder Cylinder head pressing process for pressing the head with a pressing member, and retracting the support bar by retracting the open / close rod inserted in the support bar That to the support bar Chijimi閉 step, a support bar extraction step to extract the support bar from the cylinder head is slightly swung a reduced closed the support bar, characterized in that it consists of.

  The invention according to claim 7 is characterized in that, during the moving process, the cylinder head is swung so as to face a camera provided in the vicinity of the robot, and a mounting part of the cylinder head is inspected.

  The invention according to claim 8 is characterized by inspecting whether or not a predetermined part is attached to the cylinder block during the moving process.

  In the invention according to claim 9, in the support bar removing step, after the opening / closing rod inserted into the support bar is retracted, the cylinder head is slightly swung around the arm shaft while the cylinder head is pressed by the pressing member. The support bar is extracted from the head.

The invention according to claim 1 includes a support bar that is divided so that the tip can be expanded, an open / close rod that expands the support bar by moving forward, and an open / close rod drive source that advances and retracts the open / close rod. The opening and closing rod drive source provided on the robot arm and the support member that supports the support bar. The cylinder head is configured by opening the support bar and tilting the cylinder head forward to apply the load of the cylinder head to the support bar. Grip. Since there are few components, a small and simple structure can be achieved. As a result, the load on the robot can be reduced.
In addition, since the support bar is inserted into the oblique hole and the cylinder head is gripped, the cylinder head can be reliably positioned without being displaced.

  According to the second aspect of the present invention, until the cylinder head moves onto the cylinder block, the cylinder head is swung so as to face the camera provided in the vicinity of the robot, and the mounting parts of the cylinder head are inspected. Since only a camera is required without requiring a separate inspection device, the entire device can be simplified.

  The invention according to claim 3 includes an inspection mechanism for inspecting whether or not a predetermined part is attached to the cylinder block. By providing an inspection mechanism in the robot provided with the gripping device, a separate inspection space is not required.

  In the invention according to claim 4, the oblique hole is a plug hole into which an engine spark plug is inserted. Even if the model of the engine changes, the position of the plug hole does not change greatly, so it can be handled with the same gripping device.

In the invention according to claim 5, the cylinder head placed on the cylinder block is pressed by the pressing member, and the support bar is pulled out from the cylinder head. Since the cylinder head is pressed by the pressing member, the support bar can be easily removed.
In addition, the cylinder head can be held without shifting.

The invention according to claim 6 grips the cylinder head by applying the load of the cylinder head to the support bar inserted into the oblique hole with the cylinder head tilted forward, and moves the gripped cylinder head onto the cylinder block. The support bar that has been closed and closed is slightly swung to remove the support bar from the cylinder head. Since the cylinder head can be gripped and released with a simple operation, the number of engine assembly steps can be reduced.
In addition, since the support bar is slightly swung and extracted from the cylinder head, a firm gripping state can be reliably solved.

  According to the seventh aspect of the present invention, during the moving process, the cylinder head is swung so as to face a camera provided in the vicinity of the robot, and the mounting parts of the cylinder head are inspected. Since inspection is performed during the moving process, the number of man-hours can be reduced.

  The invention according to claim 8 inspects whether or not a predetermined part is attached to the cylinder block during the moving process. Since the inspection is performed immediately before the cylinder head is placed on the cylinder block, a missing part can be reliably detected.

  According to the ninth aspect of the present invention, in a state where the cylinder head is pressed by the pressing member, the support bar is extracted from the cylinder head by slightly swinging about the arm shaft. Since the arm shaft is slightly swung around the arm shaft, the gripping state of the support bar attached to the inner surface of the hole of the cylinder head can be reliably solved.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a layout view of a cylinder head gripping device according to the present invention. A cylinder head gripping device 10 is provided on a robot arm 12 of an industrial robot 11. A cylinder head conveyor 13 and an engine fluid conveyor 14 are arranged on both sides of the robot 11. In the vicinity of the robot 11, a camera 17 that inspects the mounting parts 16, 16 of the cylinder head 15, a side shuttle 18 that conveys the cylinder head 15 whose inspection results are unacceptable, and a control unit that performs a series of controls. 21 are arranged.
Cylinder block positioning devices 23 and 23 for positioning the cylinder block 22 so as to face the engine fluid conveyor 14, and a pressing device 25 including a pressing member 24 for pressing the cylinder head 15 moved onto the cylinder block 22, Is arranged.

The cylinder head 15 is placed on the cylinder head pallet 26 and conveyed by the cylinder head conveyor 13, and stops at a predetermined position. The conveyed cylinder head 15 is gripped by the cylinder head gripping device 10 using the plug holes 27 as a plurality of oblique holes, and placed on the cylinder block 22.
On the other hand, the cylinder block 22 is placed on the cylinder block pallet 28 and conveyed by the engine flow conveyor 14, and stops at a predetermined position. The cylinder block 22 is assembled with the cylinder head 15 and conveyed to the next step.

  FIG. 2 is a view for explaining the basic configuration of the cylinder head gripping device according to the present invention. The cylinder head gripping device 10 is a bar inserted into a plug hole 27 (see FIG. 1) as an oblique hole. The support bars 32 and 32 are divided so that the tip 31 can be expanded in the vertical direction, and the open / close rod that expands the support bars 32 and 32 by being inserted into the support bars 32 and 32 and moving forward. 33, an open / close rod drive source 34 for moving the open / close rod 33 back and forth, a support member 35 provided on the robot arm 12 for supporting the open / close rod drive source 34 and the support bars 32, 32, and an obliquely vertical The upper and lower rails 36, 36 extending to the upper and lower rails 36, 36 are movably mounted on the upper and lower rails 36, 36. The fixing members 38, 38 for fixing the support bars 32, 32 and the open / close rod drive source 34 are operated to open the support bars 32, 32 inserted into the cylinder head 15 (see FIG. 1), thereby The cylinder head 15 is gripped by tilting 15 forward and applying the load of the cylinder head 15 to the support bars 32, 32, and the cylinder head 15 is moved onto the cylinder block 22 (see FIG. 1). Is pressed by the pressing member 24, the opening / closing rod 33 is moved backward to close the support bars 32, 32, and the support bars 32, 32 are removed from the cylinder head 15 (see FIG. 1). )

  Reference numeral 41 denotes a load relaxation mechanism. The load relaxation mechanism 41 includes a base member 42 provided on the robot arm 12, a load relaxation rail 43 provided on the base member 42 and extending in the vertical direction in the figure, A load relaxation slider 44 that is hooked to the load relaxation rail 43 so as to be movable up and down, a bracket 45 that is provided on the load relaxation slider 44 and fixes the gripping device 10, and a connection rod 46 that is provided on the base member 42 via a connection rod 46. The air cylinder 47 is used to suspend the bracket 45.

  The air cylinder 47 supports the gripping device 10 with a constant pressure, but when a load exceeding a certain pressure is applied, the gripping device 10 is released via the load relaxation rail 43. As a result, damage to the gripping device 10 can be prevented.

  Reference numeral 51 denotes an inspection mechanism 51 for inspecting whether or not a predetermined part is attached to the cylinder block 22 (see FIG. 1). The inspection mechanism 51 is a support plate provided on the robot arm 12. 52, guide rods 53, 53 slidably provided on the support plate 52, a moving plate 54 provided on the guide rods 53, 53, and a cylinder provided on the moving plate 54 so as to be movable up and down. An inspection pin 55 for inspecting whether or not a predetermined part is attached to the block, a detection sensor 56 for detecting that the inspection pin 55 has been raised, and a moving plate 54 provided on the support plate 52 via a rod 57. The inspection cylinder 58 is connected.

The inspection pin 58 is moved away from the gripping device 10 by operating the inspection cylinder 58 and moving the inspection pin 55 downward in the figure. When the inspection pin 55 comes into contact with a predetermined part of the cylinder block, the inspection pin 55 rises and the detection sensor 56 detects the inspection pin 55. As a result, in a state where the cylinder head 15 (see FIG. 1) is gripped by the gripping device 10, the robot 11 is operated in accordance with teaching, and whether or not a predetermined part such as a gasket is attached to the cylinder block by the inspection pin 55. Can be inspected.
Reference numeral 59 denotes an arm shaft 59 of the robot arm 12.

  FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2, and the gripping device 10 includes two sets of support bars 32 and 32. Two sets of support bars 32 and 32 are inserted into plug holes 27 (see FIG. 1) as oblique holes of the cylinder head 15 (see FIG. 1), and the cylinder head 15 is gripped at two points, so the cylinder head Can be prevented, and can be reliably gripped.

  Here, pay attention to the left half of the figure. The gripping device 10 includes a base plate 61 that is a base, left and right rails 62 and 62 that are provided on the base plate 61 and extend left and right in the drawing, and a support member 35 that is provided movably on the left and right rails 62 and 62. A width adjustment drive source 64 provided on the base plate 61 for moving the support member 35 back and forth via the width adjustment rod 63, and a first stopper 65 and a second stopper 66 for restricting the movement of the support member 35. Yes.

  Since the width adjusting drive source 64 is operated and the position of the support member 35 on the left side of the figure is moved to adjust the distance between the two left and right support bars 32, 32, the cylinder head 15 (see FIG. 1) model is available. In contrast, the left and right support bars 32 and 32 can be inserted into the plug hole 27 even if the distance between the plug holes 27 (see FIG. 1) changes. As a result, different types of cylinder heads 15 can be gripped.

The fixing members 38, 38 are provided with pins 67, 67, 67, 67, and tension springs 68, 68 are hooked on these pins 67, 67, 67, 67. The upper and lower support bars 32 are urged by the tension springs 68 and 68 in the closing direction.
Reference numerals 71 and 71 denote third stoppers that restrict the lowering limit of the support bars 32 and 32 on the lower side in the drawing.

4 is a cross-sectional view taken along line 4-4 of FIG. 3, and tapers 72, 72, 72, 72 are provided on the inner peripheral portions of the support bars 32, 32. FIG. The opening / closing rod 33 is provided with large outer diameter portions 73, 73, 73 and small outer diameter portions 74, 74. Thereby, the support bars 32 and 32 are expanded in diameter by advancing the opening / closing rod 33.
The support member 35 is provided with sliders 75 and 75 and is hooked on the left and right rails 62 and 62.

The operation of the cylinder head gripping device constructed as described above will be described next.
FIG. 5 is a diagram for explaining the support bar insertion step. As shown by an arrow (1), the cylinder head gripping device 10 is lowered and a plug hole 27 as an oblique hole of the cylinder head 15 (see FIG. 1) The support bar 32 is inserted into.

FIG. 6 is a view for explaining the support bar expanding step. As shown in FIG. 6A, the open / close rod drive source 34 is operated to advance the open / close rod 33 in the direction of the arrow (2). Then, the support bars 32 and 32 are moved as indicated by arrows (3) and (3). As a result, as shown in (b), the support bars 32 are expanded.
Then, as shown by the arrow (4), the cylinder head gripping device 10 is moved to move to the moving step.

  FIG. 7 is a view for explaining the operation of inspecting the mounting part of the cylinder head during the moving process. The cylinder head 15 is moved to the position of the camera 17 shown in FIG. As shown by the arrow (5), the cylinder head 15 is swung so as to face the camera 17, and the mounting parts 16, 16 of the cylinder head 15 are inspected. If the inspection results are acceptable, the cylinder head 15 is moved onto the cylinder block 22 (see FIG. 1). If the result of the inspection is a failure, the cylinder head 15 is discharged to the side shuttle 18 (see FIG. 1).

  FIG. 8 is a diagram for explaining an operation for inspecting whether or not a predetermined part is attached to the cylinder block during the moving process. As shown by an arrow (8), the inspection mechanism 51 is moved so that the cylinder block 22 is moved. Let it come. The moving plate 54 of the inspection mechanism 51 is lowered and operated as taught as indicated by an arrow (9), and it is inspected whether or not a predetermined part is attached to the cylinder block 22 by the inspection pin 55. If the inspection results are acceptable, the cylinder head 15 is placed on the cylinder block 22. If the result of the inspection is a failure, the abnormality is notified by sound and the operation is stopped.

  FIG. 9 is a diagram for explaining the cylinder head pressing step, in which the pressing member 24 of the pressing device 25 is moved as indicated by an arrow (10). Further, as shown by the arrow (11), the pressing member 24 is moved to the position indicated by the imaginary line, and the cylinder head 15 is fixed. At this time, the cylinder block 22 is firmly positioned and fixed by the cylinder block positioning devices 23 and 23 from both sides.

FIG. 10 is a diagram for explaining the support bar contracting / closing process and the support bar extracting process.
(A) is a figure explaining a support bar contraction closing process, operates the opening-and-closing rod drive source 34, and makes the opening-and-closing rod 33 retreat like an arrow (12). Then, as indicated by arrows (13) and (13), the support bars 32 and 32 move, and the support bars 32 and 32 are contracted.
(B) is a diagram for explaining the support bar extraction step, and as shown by an arrow (14), the support bars 32 and 32 are slightly swung around the arm shaft 59 (see FIG. 2) of the robot 11. Then, the support bars 32 are removed from the cylinder head 15. As a result, the support bars 32 and 32 attached to the inner surface of the oblique hole 27 of the cylinder head 15 can be removed, and a firm gripping state can be reliably released.

  The cylinder head gripping device of the present invention is applied to an engine cylinder head. However, the present invention is not limited to this, and a workpiece having a plurality of oblique holes may be applied to other general mechanical parts. There is no problem.

  The cylinder head gripping device according to the present invention is suitable for a cylinder head gripping device for gripping a cylinder head of an engine.

It is a layout view of a gripping device for a cylinder head according to the present invention. It is a figure explaining the basic composition of the grasping device of the cylinder head concerning the present invention. FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is a figure explaining a support bar insertion process. It is a figure explaining a support bar expansion process. It is a figure explaining the operation | movement which test | inspects the attachment component of a cylinder head during a movement process. It is a figure explaining the operation | movement which test | inspects whether a predetermined | prescribed part is attached to the cylinder block during a movement process. It is a figure explaining a cylinder head pressing process. It is a figure explaining a support bar contraction process and a support bar extraction process. It is a figure explaining the basic principle of the prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Holding apparatus of cylinder head, 11 ... Robot, 12 ... Robot arm, 15 ... Cylinder head, 16 ... Mounting part, 17 ... Camera, 21 ... Control part, 22 ... Cylinder block, 27 ... Diagonal hole (plug hole), 32 ... Support bar, 33 ... Open / close rod, 34 ... Open / close rod drive source, 35 ... Support member, 51 ... Inspection mechanism, 68 ... Tension spring.

Claims (9)

In a cylinder head gripping device for gripping an engine cylinder head having a plurality of oblique holes,
A bar inserted into the oblique hole, the support bar being divided so that the tip can be expanded; and
An open / close rod that expands the support bar by being inserted into the support bar and moving forward;
An open / close rod drive source for moving the open / close rod back and forth,
A support member that is provided in a robot arm and supports the opening / closing rod drive source and the support bar,
Actuating the opening / closing rod drive source to open the support bar inserted into the cylinder head, and holding the cylinder head by applying the load of the cylinder head to the support bar with the cylinder head tilted forward, The cylinder head is moved onto the cylinder block, the cylinder head is placed on the cylinder block, the opening / closing rod is retracted to close the support bar, and the support bar is removed from the cylinder head. Cylinder head gripping device.   The cylinder head gripping device swings the cylinder head so as to face a camera provided in the vicinity of the robot until the cylinder head moves onto the cylinder block. The cylinder head gripping device according to claim 1, wherein an inspection is performed.   2. The cylinder head gripping device according to claim 1, further comprising an inspection mechanism for inspecting whether or not a predetermined part is attached to the cylinder block.   The cylinder head gripping device according to claim 1, wherein the oblique hole is a plug hole into which an ignition plug of an engine is inserted.   2. The cylinder head mounted on the cylinder block, the cylinder head mounted on the cylinder block is pressed by a pressing member, and the support bar is pulled out from the cylinder head after the cylinder head is mounted on the cylinder block. Cylinder head gripping device. A cylinder head gripping method for gripping a cylinder head of an engine having a plurality of oblique holes,
A support bar insertion step of inserting a support bar that is divided so that the tip can be expanded in the oblique hole;
A support bar expanding step of expanding the support bar by advancing the open / close rod inserted into the inserted support bar;
A gripping step of gripping the cylinder head by applying the load of the cylinder head to the support bar with the cylinder head tilted forward by the expanded support bar;
A cylinder head moving step of moving the gripped cylinder head onto the cylinder block;
A cylinder head pressing step of pressing the moved cylinder head with a pressing member;
A support bar shrinking step of retracting the support bar by retracting the open / close rod inserted into the support bar;
A method of gripping a cylinder head, comprising: a support bar extracting step of slightly swinging the contracted support bar to extract the support bar from the cylinder head.   The cylinder head gripping method according to claim 6, wherein, during the moving step, the cylinder head is swung so as to face a camera provided in the vicinity of the robot, and an installation part of the cylinder head is inspected. .   7. The cylinder head gripping method according to claim 6, wherein whether or not a predetermined part is attached to the cylinder block is inspected during the moving step.   In the support bar extraction step, after the opening / closing rod inserted into the support bar is retracted, the cylinder head is supported by the cylinder head by slightly swinging around the arm shaft while the cylinder head is pressed by the pressing member. The cylinder head gripping method according to claim 6, wherein the bar is pulled out.

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