JP2658784B2 - Camshaft assembly device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camshaft assembling apparatus used in a process of assembling a camshaft to a cylinder head of an engine.

[0002]

2. Description of the Related Art A cylinder head of an engine is provided with a camshaft constituting a part of a valve mechanism. For example, the cylinder head a shown in FIG. 14 has a camshaft insertion hole b, and the camshaft c is inserted into the camshaft insertion hole b. The camshaft c is provided with a predetermined number of cams d according to the model of the engine, and is also provided with a plurality of journals e. The journal portion e is rotatably supported by a bearing portion f formed on the inner surface of the cam shaft insertion hole b.

Conventionally, the operation of inserting the camshaft c to a predetermined position of the camshaft insertion hole b relies on manual work, but at this time, it is necessary to use some kind of guide member. Because the cam shaft c has the largest diameter of the journal portion e and the other portions have a smaller diameter, even if the cam shaft c is to be inserted as it is, the journal portion e passes through the bearing portion f. At this point, the cam shaft c falls at the small diameter portion, and the journal portion e is caught by the front bearing portion f even if the cam shaft c is further inserted.

For this reason, conventionally, before inserting the camshaft c into the camshaft insertion hole b, a cylindrical guide member is inserted into the camshaft insertion hole b in advance, and the camshaft c In the state where the ends of the camshafts are fitted, an operation of inserting the camshaft c into the camshaft insertion hole b while moving the guide member in the direction of pulling out from the camshaft insertion hole b has been performed.

[0005]

For this reason, the conventional manual work is inefficient in work efficiency, and requires a great deal of labor to handle heavy camshafts and guide members. Instead of such manual work, a camshaft assembling machine that can insert the guide member by mechanical force has been considered, but a mechanism that simply pushes the guide member into the camshaft insertion hole has been considered. If the center of the guide member and the center of the guide member are slightly deviated from each other, when the guide member is inserted into the cam shaft insertion hole,
In some cases, the guide member cannot be inserted because the leading end surface of the guide member is hooked on the edge of the camshaft insertion hole. Moreover, the camshaft can be inserted only from a specific direction on the front side or the rear side with respect to the cylinder head, and there is room for improvement such as lack of versatility.

Accordingly, an object of the present invention is to enable a camshaft to be smoothly inserted into a camshaft insertion hole of a cylinder head by mechanical force, and to insert the camshaft from any direction of the front and rear of the cylinder head. It is an object of the present invention to provide a camshaft assembling apparatus that can perform the above operations.

[0007]

A camshaft assembling apparatus according to the present invention, which has been developed to achieve the above object, comprises a base, a first guide member provided on the base, and the first guide. A movable base movably provided in a direction along the member, a movable base driving actuator for moving the movable base in a direction along the first guide member, and a movable base driving actuator provided on the movable base and provided on the first guide member. A second guide member extending in the direction along the first unit, a first unit movably provided along the second guide member, a first unit driving actuator for driving the first unit,
A second unit movably provided along the second guide member, a second unit driving actuator for driving the second unit, and a second unit drive actuator provided on the first unit and provided on the second guide member. A first support shaft extending in a direction along the axis, a floating mode provided on the support shaft and movable in the axial direction with respect to the support shaft, and movable in the radial direction with respect to the support shaft; A first guide cylinder that can be displaced over a lock mode, a first switching actuator that moves the first guide cylinder over the floating mode and the lock mode, and a first switching unit provided in the second unit and A second support shaft extending in the opposite direction; and a second support shaft provided on the second support shaft and having an axis with respect to the second support shaft. A second guide cylinder displaceable over a floating mode that is movable in a radial direction with respect to the support shaft and a lock load that is not movable in a radial direction with respect to the support shaft; And a second switching actuator that moves over the lock mode.

[0008]

When the camshaft is assembled from one side of the cylinder head using the camshaft assembling apparatus of the present invention, for example, the guide cylinder of the first unit is set to the floating mode by the first switching actuator, and the second mode is set to the floating mode. The guide cylinder of the unit is set in the lock mode by the second switching actuator. In this state, the first guide cylinder is inserted into the camshaft insertion hole by the first unit driving actuator.

When the first guide cylinder is set in the floating mode, the first guide cylinder can be moved to some extent in the radial direction with respect to the first support shaft. Even if the center is slightly displaced, the first guide cylinder can be smoothly inserted into the camshaft insertion hole. Then, the first guide cylinder is inserted until the distal end thereof is fitted to the end of the camshaft. Since the other end of the cam shaft is supported by the second guide tube, the cam shaft is sandwiched between the first guide tube and the second guide tube.

Then, the entire movable base is moved in the direction of inserting the camshaft into the camshaft insertion hole by the movable base driving actuator. By doing so, the camshaft is inserted into the camshaft insertion hole following the guide cylinder while the first guide cylinder moves in the direction to come out of the camshaft insertion hole. In this case, the center of the first guide cylinder and the center of the camshaft are held in alignment with each other, and the first guide cylinder is in the floating mode with respect to the support shaft. It is smoothly inserted into the camshaft insertion hole while being guided by the cylinder.

When the camshaft is assembled from the other side of the cylinder head, the guide cylinder of the second unit is set to the floating mode by the second switching actuator, and Are set in the lock mode by the first switching actuator.
In this state, the second guide cylinder is inserted into the camshaft insertion hole by the second unit driving actuator.

In this case, the second guide cylinder is in the floating mode, and the second guide cylinder is movable in the radial direction with respect to the support shaft. Can be inserted smoothly. Then, with the cam shaft sandwiched between the first guide cylinder and the second guide cylinder, the movable base as a whole is moved by the movable base driving actuator in the direction in which the cam shaft is inserted into the cam shaft insertion hole. By doing so, the second guide cylinder moves in the direction in which it comes out of the camshaft insertion hole,
Following this guide cylinder, the camshaft is inserted into the camshaft insertion hole.

[0013]

An embodiment of the present invention will be described below with reference to the drawings. The camshaft assembling apparatus 10 shown in FIG. 1 includes a base 11 on an upper part thereof, and a guide rail 12 as a first guide member extending in the horizontal direction is provided on a lower surface side of the base 11.

A movable base 15 is provided on the lower surface of the first guide rail 12. The movable base 15 is movable in a horizontal direction (left and right directions in the figure) along the first guide rail 12. As shown in FIG. 2, a movable base driving actuator 16 is provided on the base 11.

The actuator 16 is a cylinder mechanism using a fluid such as hydraulic pressure. The cylinder body 17 is supported on the base 11 side, and a rod 18 is connected to the movable base 15 via a bracket 19. Therefore, when the rod 18 moves to the contraction side, the movable base 15 moves in the direction of arrow F in FIG. 2 with respect to the base 11, and when the rod 18 moves to the extension side, the movable base 15 moves in the direction of arrow R.

On the lower surface of the movable base 15, a guide rail 22 as a second guide member is provided. The second guide rail 22 extends in the horizontal direction similarly to the first guide rail 12. The first unit 25 is provided on the right side of the movable base 15 in the figure, and the second unit 26 is provided on the left side of the movable base 15 in the figure. Each of the units 25 and 26 includes a slider 27 and 28 that is movable along the second guide rail 22.

As shown in FIG. 2, the first unit 25
The slider 27 of the second unit 26 is driven along the guide rail 22 by the first unit driving actuator 31, and the slider 28 of the second unit 26 is driven along the guide rail 22 by the second unit driving actuator 32. It has become.

The first unit driving actuator 31 is a cylinder mechanism using hydraulic pressure or the like. The cylinder body 35 is mounted on the movable base 15 side, and the rod 36 projecting from the cylinder body 35 is connected to the slider 27 of the first unit 25. It is connected to. Therefore, when the rod 36 moves to the contraction side, the first unit 2
5 moves in the direction of arrow F in FIG. 2, and when the rod 36 moves to the extension side, the first unit 25 moves in the direction of arrow R.

The second unit driving actuator 32 is also a cylinder mechanism utilizing hydraulic pressure or the like. The short-sized cylinder body 38 and the long-sized cylinder body 3 are used.
9 are connected in series back to back. The rod 40 projecting from the short-sized cylinder body 38 is connected to the bracket 41 of the movable base 15 and the rod 42 projecting from the long-sized cylinder body 39.
Are connected to the slider 28 of the second unit 26. Therefore, when the rod 42 moves to the contraction side, the movable base 1
5, the second unit 26 moves in the direction of arrow R2 in FIG. 2, and when the rod 42 moves to the extension side, the second unit 26 moves in the direction of arrow F2. Further, by moving the short-sized rod 40 to the extension side or the contraction side, the initial position of the second unit 26 can be switched in two stages according to the length of the cylinder heads a and a '.

The first unit 25 is configured as shown in FIG. That is, a bracket 45 is attached to the slider 27 of the first unit 25, and a hollow support shaft 46 is fixed below the bracket 45. The support shaft 46 extends in the horizontal direction. Large-diameter portions 48 and 49 are provided on the outer peripheral surface of the distal end portion of the support shaft 46 and the outer peripheral surface of the intermediate portion in the axial direction, respectively.

A through hole 51 is provided in the center of the support shaft 46 along the axial direction, and a hollow operation shaft 53 is inserted through the through hole 51. This operation shaft 53 is
The bearings 54 and 55 support the shaft so as to be relatively movable in the axial direction. A spring seat 56 is provided at the tip of the operation shaft 53.

A base 60 on the right side of the operation shaft 53 is fixed to a drive arm 61. The drive arm 61 includes a bearing 62 and is supported movably in a direction along a guide shaft 63 provided on the bracket 45. The guide shaft 63 is parallel to the support shaft 46.

The drive arm 61 is driven by a first switching actuator 65 in the axial direction of the guide shaft 63. The first switching actuator 65 is a fluid cylinder mechanism such as a compact cylinder.
6 is fixed to the bracket 45 side, and the rod 67 is connected to the drive arm 61. Therefore, when the rod 67 moves to the extension side, the operation shaft 53 retreats to the position shown in FIG. 3, and when the rod 67 moves to the contraction side, the operation shaft 53 moves to the position shown in FIG.
Move forward to the position shown in.

A through hole 70 is provided at the center of the operation shaft 53 along the axial direction, and a center rod 71 is inserted through the through hole 70. The outer diameter of the center rod 71 is sufficiently smaller than the inner diameter of the through hole 70, so that the center rod 71 can move to some extent in the radial direction with respect to the operation shaft 53.

The first guide cylinder 7 is provided outside the support shaft 46.
5 are provided. The guide cylinder 75 has a hollow hole 76 into which the support shaft 46 is inserted. Guide tube 7
A compression coil spring 78 is provided between the inner wall 77 of the fifth and the spring seat 56. The spring 78 is provided on the guide cylinder 7
5 is urged in a direction to protrude from the support shaft 46. The outer diameter of the guide cylinder 75 is a dimension that can be just inserted into the cam shaft insertion hole b of the cylinder head a.

Inside the guide cylinder 75, convex portions 80, 8 having an inner diameter that can be fitted exactly with the large diameter portions 48, 49 of the support shaft 46.
1 is provided. The inside diameter of the part other than the convex parts 80 and 81 is sufficiently larger than the outside diameter of the large diameter parts 48 and 49.
The distance between the convex portions 80 and 81 is substantially equal to the distance between the large diameter portions 48 and 49.

Therefore, as shown in FIG. 3, when the guide cylinder 75 is at a position retracted by a predetermined amount with respect to the support shaft 46, the projections 80 and 81 of the guide cylinder 75 are
By moving away from the large-diameter portions 48 and 49 of 6, the guide cylinder 75 enters a floating mode in which the guide cylinder 75 can move in the radial direction of the support shaft 46. Conversely, as shown in FIG. 4, when the guide cylinder 75 is at the forward position with respect to the support shaft 46, the projections 80 and 81 of the guide cylinder 75 are fitted to the large diameter parts 48 and 49 of the support shaft 46. As a result, the guide cylinder 75
Becomes a lock mode in which it cannot move in the radial direction with respect to the support shaft 46.

As shown in an enlarged manner in FIG.
5 is provided with an end member 85 for receiving the first end C1 of the cam shaft c. The end member 85 is the guide cylinder 7
5, and is urged by a spring 86 in a direction protruding from the guide cylinder 75. An elongated hole 87 extending in the axial direction is provided on a side surface of the end member 85, and a stopper 88 enters the elongated hole 87.
The stopper 88 is fixed to the guide cylinder 75,
The end member 85 can be moved in the above-mentioned direction within the length range of 7.

The tip of the center rod 71 is fixed to the inner wall 77 of the guide cylinder 75. Center rod 7
A detection section 90 is provided on the other end side of 1. As shown in FIG. 3, when the center rod 71 is located fully forward with respect to the operation shaft 53, the detected portion 90 is detected by a sensor 91 such as a proximity switch. When the center rod 71 is retracted with respect to the operation shaft 53, the detected portion 90 moves in a direction away from the sensor 91 as shown by a two-dot chain line in FIG.

The second unit 26 is configured as shown in FIG. That is, the bracket 145 is attached to the slider 28 of the second unit 26, and the hollow support shaft 146 is fixed below the bracket 145. The support shaft 146 extends horizontally in a direction facing the first unit 25. The large-diameter portions 1 are provided on the outer peripheral surface at the tip end of the support shaft 146 and the outer peripheral surface at the intermediate portion in the axial direction.
48 and 149 are provided.

A through hole 151 is provided at the center of the support shaft 146 along the axial direction, and a hollow operation shaft 153 is inserted through the through hole 151. Operation shaft 153
Are supported by bearings 154 and 155 so as to be relatively movable in the axial direction. Spring seat 1 at the tip of the operation shaft 153
56 are provided.

The base 160 on the left side of the operation shaft 153 is fixed to the drive arm 161. The drive arm 161 includes a bearing 162 and is supported movably in a direction along a guide shaft 163 provided on the bracket 145. The guide shaft 163 is parallel to the support shaft 146.

The drive arm 161 is driven in the axial direction of the guide shaft 163 by the second switching actuator 165. The second switching actuator 165 is a fluid cylinder mechanism such as a compact cylinder. The cylinder body 166 is fixed to the bracket 145 side, and the rod 167 is connected to the drive arm 161. Therefore, when the rod 167 moves to the extension side, the operation shaft 153 is
When the rod 167 moves to the retracted side, the operation shaft 153 moves forward to the position shown in FIG.

A through hole 170 is provided in the center of the operation shaft 153 along the axial direction, and a center rod 171 is inserted through the through hole 170. Center rod 1
The outer diameter of 71 is sufficiently smaller than the inner diameter of through-hole 170, so that center rod 171 can move to some extent in the radial direction with respect to operation shaft 153.

A second guide cylinder 175 is provided outside the support shaft 146. The guide cylinder 175 has a hollow hole 176 into which the support shaft 146 is inserted.
A compression coil spring 178 is provided between the inner wall 177 of the guide cylinder 175 and the spring seat 156. The spring 178 urges the guide cylinder 175 in a direction to protrude from the support shaft 146. The outer diameter of the guide cylinder 175 is a dimension that can be inserted into the camshaft insertion hole b of the cylinder head a.

The support shaft 14 is provided inside the guide cylinder 175.
6 are provided with protrusions 180 and 181 having an inner diameter that can be fitted exactly with the large diameter portions 148 and 149. Convex portions 180, 181
The inner diameters of the other parts are sufficiently larger than the outer diameters of the large diameter parts 148 and 149. The distance between the convex portions 180 and 181 is substantially equal to the distance between the large diameter portions 148 and 149.

Therefore, as shown in FIG.
When the guide cylinder 175 is at a position retracted by a predetermined amount with respect to the projection 6, the projections 180 and 181 of the guide cylinder 175
By moving away from 8, 149, the guide cylinder 175 enters a floating mode in which the guide cylinder 175 is movable in the radial direction of the support shaft 146. Conversely, when the guide cylinder 175 is at the forward position with respect to the support shaft 146 as shown in FIG.
8, 149, the guide cylinder 175 is in a lock mode in which the guide cylinder 175 cannot move in the radial direction with respect to the support shaft 146.

As shown in an enlarged manner in FIG.
An end member 185 for receiving the second end C2 of the camshaft is provided at the distal end of 75. The end member 185 is movable in the axial direction of the guide cylinder 175,
6 is urged in a direction to protrude from the guide cylinder 175. Long hole 1 along the axial direction in the side surface of end member 185
87 are provided.
8 has entered. The stopper 188 is a guide cylinder 175
Is fixed to the end member 1 within the length range of the long hole 187.
85 is movable in the above direction.

The tip of the center rod 171 is fixed to the inner wall 177 of the guide cylinder 175. The detected part 190 is provided on the other end side of the center rod 171. As shown in FIG. 5, when the center rod 71 is located fully forward with respect to the operation shaft 153, the detected portion 190 is detected by a sensor 191 such as a proximity switch. In addition, the center rod 1 is
When the 71 is retracted, the detected portion 190 moves in a direction away from the sensor 191 as shown by a two-dot chain line in FIG.

Next, the operation of the camshaft assembling apparatus 10 having the above configuration will be described. As shown in FIG. 1, when the cam shaft c placed on the right side of the cylinder head a is inserted from the right side of the cylinder head a, the guide cylinder 75 of the first unit 25 is moved by the first switching actuator 65. While the lock mode (the state shown in FIG. 4) is set, the guide cylinder 175 of the second unit 26 is set in the floating mode (the state shown in FIG. 5) by the second switching actuator 165. First unit 25
When the guide cylinder 75 is set in the lock mode, the guide cylinder 75
Move to some extent in the direction of the cam shaft c, the first end C1 of the cam shaft c is supported by the end member 85.

Then, the second guide cylinder 175 is moved to the position shown in FIG. 7 by the second unit drive actuator 32, whereby the second guide cylinder 175 is inserted into the cam shaft insertion hole b. Thus, the second guide cylinder 175
Is inserted into the cam shaft insertion hole b.
5 is in the floating mode, and the guide cylinder 175 can move to some extent in the radial direction with respect to the support shaft 146. Therefore, even if the center of the cam shaft insertion hole b and the center of the support shaft 146 are shifted from each other, The second guide cylinder 175 can be smoothly inserted into the camshaft insertion hole b. Then, the tip of the second guide cylinder 175 is fitted to the second end C2 of the cam shaft c, so that the cam shaft c is sandwiched between the first guide cylinder 75 and the second guide cylinder 175. (The state shown in FIG. 7).

When the guide cylinder 175 is displaced in the direction of compressing the spring 178 when the distal end surface of the guide cylinder 175 is hooked on the edge of the cam shaft insertion hole b when the guide cylinder 175 is inserted, the operating shaft is moved. When the center rod 171 is relatively retracted with respect to 153, the detection unit 190 is displaced as shown by a two-dot chain line in FIG. In this case, sensor 1
With 91, it is possible to detect that the center rod 171 has retreated, and to know that the insertion has been hindered.

After the guide cylinder 175 has been inserted to the predetermined position of the camshaft insertion hole b, the direction in which the camshaft c is inserted into the camshaft insertion hole b by the movable base driving actuator 16 (see FIG. 7). (In the direction of arrow F). By doing so, the second guide cylinder 175 moves in a direction to come out of the cam shaft insertion hole b, and the cam shaft c is inserted into the cam shaft insertion hole b while being guided by the guide cylinder 175. The cam shaft c is held in a state where its center coincides with the center of the second guide cylinder 175, and the second guide cylinder 175 is in the floating mode with respect to the support shaft 146. 8 while being guided by the second guide cylinder 175.
As shown in (2), it is smoothly inserted to a predetermined position of the cam shaft insertion hole b.

As shown in FIG. 9, when another type of camshaft c 'is inserted from the left side of the cylinder head a' in the figure, the receiving side is opposite to the case of the camshaft c. 2
The guide cylinder 175 of the unit 26 is set in the lock mode (the state shown in FIG. 6) by the second switching actuator 165, and the guide cylinder 7 of the first unit 25 is set.
5 is set in the floating mode (the state shown in FIG. 3) by the first switching actuator 65. Second
When the guide cylinder 175 of the unit 26 is in the lock mode, the guide cylinder 175 moves to some extent in the direction of the cam shaft c ', so that the second end C2 of the cam shaft is supported by the end member 185 of the guide cylinder 175.

When the length of the cylinder head a 'is shorter than the cylinder head a, the rod 40 of the short-sized cylinder body 38 of the second unit driving actuator 32 (see FIG. 2) is moved to the contraction side. As a result, the second unit 26 is moved in the direction of the arrow R2 in FIG. 2 by the length of the cylinder head a '.

Then, the first guide cylinder 75 is moved in the direction of arrow F in FIG. 9 by the first unit driving actuator 31 to insert the first guide cylinder 75 into the cam shaft insertion hole b '. . In this case, since the first guide cylinder 75 is in the floating mode and the guide cylinder 75 can move to some extent in the radial direction with respect to the support shaft 46, the center of the cam shaft insertion hole b 'and the support shaft 46 Of the first guide cylinder 7
5 can be smoothly inserted into the camshaft insertion hole b '.
By fitting the tip of the first guide cylinder 75 to the first end C1 of the cam shaft c ', the cam shaft c' is sandwiched between the first guide cylinder 75 and the second guide cylinder 175. (State in FIG. 10).

When the guide cylinder 75 is displaced in the direction of compressing the spring 78 when the leading end surface of the guide cylinder 75 is hooked on the edge of the cam shaft insertion hole b when the guide cylinder 75 is inserted, the operating shaft is moved. When the center rod 71 retreats relatively to the position 53, the line detection unit 90 is displaced as shown by a two-dot chain line in FIG. In this case, the sensor 91 can detect that the center rod 71 has retreated, and it can be seen that the insertion has been hindered.

After the guide cylinder 75 has been inserted to the predetermined position of the cam shaft insertion hole b ', the cam shaft c' is then moved by the movable base driving actuator 16 to the cam shaft insertion hole b '.
The entire movable base 15 is moved in the direction of insertion (the direction of arrow R in FIG. 10). By doing so, the first guide cylinder 75 moves in a direction to come out of the cam shaft insertion hole b ', and the cam shaft c' is inserted into the cam shaft insertion hole b 'while being guided by the guide cylinder 75. Go on. Cam shaft c '
Is held in a state where its center coincides with the center of the first guide cylinder 75, and since the first guide cylinder 75 is in the floating mode with respect to the support shaft 46, the cam shaft c ' While being guided by the guide cylinder 75, as shown in FIG. 11, it is smoothly inserted to a predetermined position of the cam shaft insertion hole b '.

According to the camshaft assembling apparatus 10, the two types of camshafts c and c 'can be inserted from both front and rear sides of the cylinder heads a and a' without any problem. By selecting and switching one of the guide cylinders 75 and 175 to the floating mode or the lock mode, the guide cylinders 75 and 175 can be smoothly inserted into the cam shaft insertion holes b and b '.

[0050]

According to the present invention, the camshaft can be smoothly inserted from either the front or rear side of the cylinder head according to the type of the camshaft or the cylinder head, and the efficiency of the camshaft assembling operation can be improved. This is extremely effective in saving equipment.

[Brief description of the drawings]

FIG. 1 is a front view of a camshaft assembling apparatus showing one embodiment of the present invention.

FIG. 2 is a bottom view of the device shown in FIG.

FIG. 3 is a sectional view showing a first unit of the apparatus shown in FIG. 1;

FIG. 4 is a cross-sectional view showing a state where the guide cylinder of the first unit shown in FIG. 3 is in a lock mode.

FIG. 5 is a sectional view showing a second unit of the device shown in FIG. 1;

FIG. 6 is a sectional view showing a state where the guide cylinder of the second unit shown in FIG. 5 is in a lock mode.

7 is a front view showing a state where a second guide cylinder of the device shown in FIG. 1 is inserted into a cylinder head.

FIG. 8 is a front view showing a state where the camshaft is inserted into the cylinder head by the device shown in FIG. 1;

FIG. 9 is a front view showing a state before a first guide cylinder of the device shown in FIG. 1 is inserted into a cylinder head.

FIG. 10 is a front view showing a state where a first guide cylinder of the device shown in FIG. 1 is inserted into a cylinder head.

FIG. 11 is a front view showing a state where another type of camshaft is inserted into the cylinder head by the device shown in FIG. 1;

FIG. 12 is a sectional view showing a distal end portion of a first unit of the apparatus shown in FIG. 1;

FIG. 13 is a sectional view showing a distal end portion of a second unit of the device shown in FIG. 1;

FIG. 14 is a front view showing a cam shaft and a part of a cylinder head in a cross section.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Cam shaft assembly apparatus, 11 ... Base, 12 ... First guide member, 15 ... Movable base, 16 ... Movable base drive actuator, 22 ... Second guide member, 25 ... First unit, 26 ... 2 units, 31: first unit driving actuator, 32: second unit driving actuator, 46: support shaft, 65: first switching actuator, 75: first guide cylinder, 146: support shaft, 165 ... Second switching actuator, 175 ... second guide cylinder, a, a '... cylinder head, b, b' ...
Cam shaft insertion holes, c, c '... cam shafts.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Mikio Kobayashi 10-3-10 Nakaune, Kurashiki-shi, Okayama Pref. Sanyo Giken Co., Ltd. (56) References JP-A-62-102930 (JP, A) Showa 52-57399 (JP, U)

Claims (1)

(57) [Claims] 1. A base, a first guide member provided on the base, a movable base movably provided in a direction along the first guide member, and a first guide member provided with the movable base. A movable base driving actuator that moves in a direction along the axis, a second guide member provided on the movable base and extending in a direction along the first guide member, and movably provided along the second guide member. A first unit, a first unit driving actuator for driving the first unit, a second unit movably provided along the second guide member, and a second unit for driving the second unit. A two-unit drive actuator, a first support shaft provided on the first unit and extending in a direction along the second guide member, and a first support shaft provided on the support shaft. A first guide cylinder displaceable between a floating mode movable in the axial direction with respect to the support shaft and radially movable with respect to the support shaft and a lock mode immovable in the radial direction with respect to the support shaft; A first switching actuator for moving a cylinder between the floating mode and the lock mode;
A second support shaft provided on the unit and extending in a direction facing the first unit; and a second support shaft provided on the second support shaft and movable in the axial direction with respect to the support shaft. A second guide cylinder displaceable between a radially movable floating mode and a radially immovable lock load;
A second switching actuator for moving the guide cylinder in the floating mode and the lock mode.