JP5315181B2 - Reversing device for cylinder cover - Google Patents

Description

  The present invention relates to a reversing device for reversing the top and bottom of a cylinder cover of an engine, particularly a large engine.

  Generally, an engine has a cylinder block and a cylinder cover (cylinder head). An example of such an engine is shown in FIG. In FIG. 1, reference numeral 1 denotes a cylinder liner that forms part of a cylinder block. A cylinder cover 2 is placed and fixed on the upper surface of the cylinder liner 1. The cylinder cover 2 is provided with various members 3 </ b> A to 3 </ b> E having a rod shape such as a pilot fuel injector, and the members 3 </ b> A to 3 </ b> E stand upward from the upper surface of the cylinder cover 2. A cover case 4 is fixed to the upper surface of the cylinder cover 2. The cover case 4 covers most of the upper surface of the cylinder cover 2 and the members 3A to 3E.

  By the way, the cylinder cover 2 is removed from the cylinder liner 1 at the time of periodic maintenance or failure of the engine. Then, the cylinder cover 2 is turned upside down in order to inspect the lower part of the cylinder cover 2, particularly the lower part facing the cylinder liner 1, or to replace parts such as packing. That is, the cylinder cover 2 is rotated 180 ° so that the lower surface thereof faces upward.

  Conventionally, the cylinder cover 2 is reversed using a chain block or the like. That is, a wire is attached to a plurality of appropriate locations on the cylinder cover 2 and the wire is lifted by a chain block. Thereby, the cylinder cover 2 is removed upward from the cylinder liner 1. Thereafter, the cylinder cover 2 is lowered to the floor surface. At this time, the cylinder cover 2 is slightly rotated up and down by hand, and the intersection of the lower surface and one side surface of the cylinder cover 2 is placed on the floor surface. Then, the cylinder cover 2 is rotated (rolled over) around the intersection while lowering the wire. When the entire side surface of the cylinder cover 2 is in contact with the floor surface, the wire is removed from the cylinder cover 2 and attached to another appropriate location. Then, the wire is lifted and lifted while rotating the cylinder cover 2 around the intersection between the upper surface and the side surface of the cylinder cover 2. And it is rotated until the lower surface of the cylinder cover 2 faces right above. This completes the reversal of the cylinder cover 2. The inverted cylinder cover 2 is lowered onto a dedicated work surface so that the members 3A to 3E do not get in the way for inspection or the like.

  Patent Document 1 below discloses a cylinder head reversing device, but this reversing device is completely different from the reversing device according to the invention of this application.

JP 2000-141148 A

  The reversing operation using the chain block and the wire requires manpower. However, since the cylinder cover 2 of a large engine is heavy, even though the cylinder cover 2 is suspended by a wire, the work has a great deal of labor. Moreover, there is a problem that it involves danger.

In order to solve the above problem, the present invention is a reversing device for reversing the top and bottom of a cylinder head having a plurality of through-holes whose axes are directed in the vertical direction, and a frame and a horizontal axis that is horizontal to the frame And a rotating member supported so as to be able to rotate approximately 180 ° between the supporting position and the reversing position, and a rotating means provided on the frame for rotating the rotating member. When the rotating member is located at the support position, a mounting portion is provided on which the cylinder head is mounted in a state where the axis of the through hole is directed in the vertical direction. The mounting portion includes the cylinder A plurality of fixed rods that are inserted through the through holes of the head in a penetrating state are erected, and the tip portion protruding from the through hole of the fixed rod has the above-mentioned when the rotating member rotates to the reverse position. A support member for supporting the Linda head is provided, and either the fixing rod is detachably provided on the mounting portion or the support member is detachably provided on the fixing rod. It is characterized by having.
In this case, the movable member is provided in the frame so that the position of the movable member can be adjusted in the vertical direction, and moving means for moving the movable member in the vertical direction is provided. The rotating member and the rotating means are provided in the movable member. It is desirable that
It is desirable that the fixed rod is detachably provided on the mounting portion in the axial direction of the fixed rod so that the fixed rod can be extracted from the through hole in the axial direction.
When the cylinder head is inverted while standing on the floor, a plurality of through holes inserted into the other through holes in the through holes of the cylinder head through which the fixed rod is not inserted And a contact portion that supports the cylinder head by abutting against the upper surface of the inverted cylinder head at an intermediate portion in the vertical direction of the support rod. The vehicle is provided with traveling wheels so that the vehicle can travel on the floor surface, and the frame is disposed below the inverted cylinder head until the support rod can be inserted into the other through hole. It is desirable that an introduction space in which an end on the front side in the traveling direction is opened is formed so as to be able to enter.

  According to the present invention, the cylinder cover can be reversed without the operator directly touching the cylinder cover. Therefore, the labor required for the reversing work can be reduced and the danger can be eliminated.

FIG. 1 is a front view showing a part of an essential part of an engine having a cylinder cover which is a reversal target of a reversing device for a cylinder cover according to the present invention. FIG. 2 is a plan view of the cylinder cover of the engine shown in FIG. FIG. 3 is a front view of the cylinder cover. FIG. 4 is a side view of the cylinder cover. FIG. 5 is a front view showing an embodiment of a cylinder cover reversing device according to the present invention. FIG. 6 is a plan view of the same embodiment. FIG. 7 is a side view in which a part of the embodiment is cut away. FIG. 8 is a rear view of the same embodiment. FIG. 9 is a side view showing the embodiment with the support member inverted. FIG. 10 is a side view showing a state immediately before the cylinder cover is placed on the support member of the embodiment. FIG. 11 is a side view showing a state in which the cylinder cover is placed and fixed on the support member of the embodiment. FIG. 12 is a side view showing a state in which the support member and the cylinder cover of the embodiment are inverted. FIG. 13 is a side view showing the embodiment in which the support member and the cylinder cover are inverted and moved to a predetermined work place. FIG. 14 is a side view of the embodiment shown in a state where the support member and the cylinder cover are moved downward to a predetermined position and the cylinder cover is placed on a support rod erected on the work place. FIG. 15 is a side view showing a state in which the fixed rod of the same embodiment is extracted downward from the inverted cylinder cover. FIG. 16 is a side view showing a state where the support member of the embodiment is moved upward by a predetermined distance. FIG. 17 is a side view showing a state where the embodiment is moved away from the work place.

The best mode for carrying out the present invention will be described below with reference to the drawings.
5 to 9 show an embodiment of the present invention. The cylinder cover reversing device 10 of this embodiment is for reversing the cylinder cover 2 of the engine shown in FIG. Therefore, first, the cylinder cover 2 that is the object of upside down will be described in more detail.

As shown in FIGS. 2 to 4, the cylinder cover 2 has a horizontal upper surface 2 a and a lower surface 2 b. The upper surface 2a and the lower surface 2b may have a step or a protruding portion for positioning or the like. The cylinder cover 2 is formed with a plurality (five in this embodiment) of bolt insertion holes (through holes) 2c, 2d, 2e, 2f, 2g. Each of the bolt insertion holes 2c to 2g is arranged with its axis line directed in the vertical direction, and extends from the upper surface 2a of the cylinder cover 2 to the lower surface 2b. That is, it penetrates the cylinder cover 2 in the vertical direction. A protruding portion 2 h that protrudes in the horizontal direction is formed at the upper end portion of one side surface of the cylinder cover 2. The protruding portion 2h is formed with rod insertion holes (through holes) 2i and 2j penetrating up and down. Push rods (both not shown) used to open and close the air supply / exhaust valves are inserted into the rod insertion holes 2i and 2j. A plurality (four in this embodiment) of screw holes 2k are formed in the upper surface 2a of the cylinder cover 2. A bolt (not shown) penetrating the cover case 4 is screwed into the screw hole 2k. The cover case 4 is detachably attached to the upper surface 2a of the cylinder cover 2 by tightening the bolts.

  Next, a cylinder cover reversing device 10 for reversing the cylinder cover 2 will be described. As shown in FIGS. 5 to 9, the reversing device 10 has a frame 11. The frame 11 has a pair of base materials 12 and 12. The pair of base materials 12 and 12 are made of hollow square members having a square cross section, and are disposed horizontally and parallel to each other. The pair of base materials 12 and 12 are connected to each other by a connecting member 13 at a position slightly rearward (rightward in FIG. 6) from each intermediate portion. Thereby, a pair of base materials 12 and 12 are integrated, and it behaves integrally. Wheels 14 are respectively provided at both front and rear ends of the base material 12. As a result, the reversing device 10 can travel on the floor surface F.

  A column member 15 is erected and fixed at a location where the connecting member 13 of the base 12 is connected. An upper connecting member 16 is stretched between the upper end portions of the support members 15 and 15. The upper connecting member 16, the connecting member 13, and the support columns 15, 15 form a quadrangular frame. The support member 15 is provided with a handle 17 for an operator to push and pull when the reversing device 10 is moved. The wheel 14 may be rotated by a rotational drive source (not shown) such as a motor.

  A movable member 21 is provided between the two support columns 15 and 15 so as to be movable in the vertical direction via a roller 22. A hydraulic jack (moving means) 23 is provided between the movable member 21 and the connecting member 13. With the hydraulic jack 23, the movable member 21 is moved in the vertical direction, and the vertical position thereof is appropriately adjusted. As moving means for moving the movable member 21 in the vertical direction and adjusting its position, a known device other than the hydraulic jack 23, for example, an electric jack, a manual jack, a hydraulic cylinder, or the like may be used.

  A rotating member 31 is disposed on the front side of the movable member 21, and the rotating member 31 has a substantially L-shape in a side view as shown in FIG. The mounting portion 33 extends from the lower end of the vertical portion 32 to the front in the horizontal direction. The vertical portion 32 is rotatably supported by the movable member 21 via a bearing 34. The rotation axis of the vertical portion 32 is arranged in parallel with the base material 12. That is, the vertical portion 32 is rotatable around a rotation axis that extends horizontally in the front-rear direction.

A rotating means 40 is provided on the back surface of the movable member 21. The rotating means 40 incorporates a worm gear mechanism (not shown). When the handle 41 is turned, the worm rotates and the gear meshing with the worm rotates. This gear is connected to the vertical portion 32. Therefore, when the handle 41 is turned, the rotating member 31 rotates. The rotating means 40 may be electrically operated instead of manually. Further, instead of the worm gear mechanism, another rotation mechanism built-in may be used.

The placement portion 33 is for supporting the cylinder cover 2, and the cylinder cover 2 is placed on the upper surface 33 a of the placement portion 33. The mounting portion 33 can rotate 180 ° between at least the mounting position (supporting position) shown in FIG. 7 and the reverse position shown in FIG. 9 as the vertical portion 32 rotates. When the placement portion 33 is located at the placement position, the upper surface 33a faces vertically upward, and when it is located at the reversal position, the upper surface 33a faces vertically downward.

  A plurality of (three in this embodiment) fixing rods 35 a, 35 b, and 35 c are erected vertically on the mounting portion 33. The lower ends of the fixed rods 35a to 35c penetrate the mounting portion 33, and nuts 36 are respectively screwed there. By fixing the nut 36, the fixing rods 35a to 35c are fixed to the placement portion 33, respectively. When the nut 36 is removed from the fixed rods 35a to 35c, the fixed rods 35a to 35c can be removed upward from the placement portion 33. Of course, when the mounting portion 33 is located at the reverse position, the fixing rods 35 a to 35 c are removed downward from the mounting portion 33.

  The fixed rods 35a, 35b, 35c are arranged with the same positional relationship as the rod insertion holes 2i, 2j and the bolt insertion holes 2e of the cylinder cover 2 when viewed from above. Therefore, the fixing rods 35a, 35b, and 35c can be inserted into the rod insertion holes 2i and 2j and the bolt insertion hole 2e from their lower end openings. The fixing rods 35a to 35c are not necessarily inserted into the rod insertion holes 2i, 2j and the bolt insertion holes 2e, but are inserted into any three bolt insertion holes of the other bolt insertion holes 2c, 2d, 2f, 2g. It may be. In this case, the fixing rods 35a to 35c are bolt insertion holes 2c, 2d, 2g or 2f or bolt insertion so that the cylinder cover 2 can be stably supported when the mounting portion 33 is rotated to the reverse position. It is desirable to pass through the holes 2f, 2g, 2c or 2d. Four fixing rods may be provided.

When the cylinder cover 2 is placed on the upper surface 33a of the placement part 33, the upper ends of the fixation rods 35a, 35b, 35c pass through the rod insertion holes 2i, 2j and the bolt insertion holes 2e. The length of the cylinder cover 2 is set so as to protrude upward from the upper surface 2a of the cylinder cover 2. A fixing nut (support member) 37 is screwed to each upper end portion of the fixing rods 35 a to 35 c protruding upward from the cylinder cover 2. When the fixing nut 37 is tightened, the cylinder cover 2 is pressed and fixed to the mounting portion 33. When the rotating member 31 is inverted 180 ° in this state, the cylinder cover 2 is supported by the mounting portion 33 via the fixing nut 37 and the fixing rods 35a, 35b, and 35c.

As described above, the cylinder cover 2 placed on the placement portion 33 is pressed and fixed to the placement portion 33 by a screw mechanism constituted by the fixing rods 35 a to 35 c and the fixing nut 37. However, it is not always necessary to press and fix with a screw mechanism, and other mechanisms such as a bayonet mechanism may be used to press and fix. Further, the fixing nut 37 is not necessarily required to press and fix the cylinder cover 2 to the mounting portion 33. When the mounting portion 33 is rotated to the reverse position, the fixing nut 37 abuts against the upper surface 2a of the cylinder cover 2, thereby What is necessary is just to be able to support the cover 2.

  When the rotating member 31 is located at the placement position, the introduction space 51 is partitioned by the pair of base materials 12, 12, the connecting member 13, and the placement portion 33. Since the pair of base materials 12 and 12 are separated in the horizontal direction, the introduction space 51 is opened forward.

  Next, the case where the cylinder cover 2 is reversed using the reversing device 10 having the above configuration will be described with reference to FIGS. First, the bolts fixing the cover case 4 are loosened and removed from the screw holes 2k, and the cover case 4 is removed from the cylinder cover 2. Then, as shown in FIG. 10, the eyebolt A is screwed and fixed to each screw hole 2k. Then, the wire B is inserted into the eyebolt A, and the upper end portion of the wire B is supported by a chain block or other support moving means (not shown). At this time, it is desirable that the wire B is slightly stretched.

  Next, the push rod is extracted from the rod insertion holes 2i and 2j, and the bolts that fix the cylinder cover 2 to the cylinder liner 1 are extracted from the bolt insertion holes 2c to 2g. Then, as shown in FIG. 10, the cylinder cover 2 is lifted via the wire B by the chain block. Thereafter, the chain block is moved and positioned above the placement portion 33. Thereafter, the positions of the cylinder cover 2 and / or the reversing device 10 are finely adjusted, and the fixing rods 35a to 35c are aligned with the rod insertion holes 2i and 2j and the bolt insertion holes 2e so that their axes substantially coincide. . Of course, at this time, the rotating member 31 is positioned at the mounting position, and the fixing nut 37 is removed from the fixing rods 35a to 35c. Next, the cylinder cover 2 is moved downward, and the fixing rods 35a to 35c are inserted into the rod insertion holes 2i and 2j and the bolt insertion holes 2e from the respective lower end openings. At this time, since the tapered portions are formed at the respective distal end portions of the fixing rods 35a to 35c, the axes of the fixing rods 35a to 35c and the rod insertion holes 2i and 2j and the bolt insertion holes 2e are slightly shifted. In addition, when the fixing rods 35a to 35c are respectively inserted into the rod insertion holes 2i and 2j and the bolt insertion holes 2e, the cylinder cover 2 and / or the reversing device 10 automatically move so as to eliminate the deviation of the axis. . Accordingly, the fixing rods 35a to 35c can be easily inserted into the rod insertion holes 2i and 2j and the bolt insertion hole 2e.

  When the cylinder cover 2 is moved downward and placed on the placement portion 33, the upper ends of the fixing rods 35 a to 35 c protrude upward from the upper surface 2 a of the cylinder cover 2. Therefore, as shown in FIG. 11, a fixing nut 37 is screwed into each of the fixing rods 35a to 35c and tightened. Thereby, the cylinder cover 2 is fixed to the mounting portion 33.

  Next, the handle 41 of the rotating means 40 is turned to rotate the rotating member 31 from the placement position to the reverse position as shown in FIG. In this state, the cylinder cover 3 is supported by the mounting portion 33 via the fixing nut 37 and the fixing rods 35a to 35c.

  Next, as shown in FIG. 13, the reversing device 10 is moved to the inspection work place of the cylinder cover 3. A plurality of (four in this embodiment) support rods 61 are erected and fixed to the floor F of the inspection workshop. The support rod 61 is disposed in the same positional relationship in the horizontal direction as the bolt insertion holes 2c, 2d, 2f, 2g, which are through holes other than the rod insertion holes 2i, 2j and the bolt insertion holes 2e. Therefore, the bolt insertion holes 2c, 2d, 2f, 2g and the four support rods 61 can be opposed to each other by moving the reversing device 10 appropriately. Here, when the four support rods 61 are inserted into the bolt insertion holes 2c, 2d, 2f, 2g, they will enter the introduction space 51, but the front end of the introduction space 51 is open. That is, since the front end portions of the pair of base materials 12 and 12 are separated from each other, the four support rods 61 can enter the introduction space 51 without any problem by advancing the reversing device 10 in the longitudinal direction of the base material 12. Can be made.

  Thereafter, as shown in FIG. 14, the movable member 21 is moved downward by the hydraulic jack 23, and the rotating member 31 and the cylinder cover 2 are moved downward. And each upper end part of the four support rods 61 is inserted in bolt insertion hole 2c, 2d, 2f, 2g from the upper end opening part (lower end opening part in the inverted state). On the outer peripheral surface of the intermediate portion of each support rod 61, an annular protrusion (contact portion) 61a is formed. When the upper surface 2a of the cylinder cover 2 hits the upper surface of the annular protrusion 61a of each support rod 61, the downward movement of the movable member 21 by the hydraulic jack 23 is stopped. At this time, since the distance from the floor F to the upper surface of the annular protrusion 61a is longer than the protruding amount of the members 3A to 3E from the cylinder cover 2, the members 3A to 3E do not hit the floor F.

  Next, as shown in FIG. 15, the nut 36 is removed from each of the fixing rods 35a to 35c. In this state, the cylinder cover 2 is supported by the support rod 61. Then, each fixed rod 35a-35c is extracted below from the rod insertion holes 2i and 2j and the bolt insertion hole 2e. Next, as shown in FIG. 16, the movable member 21 and the rotating member 31 are moved upward to an appropriate position by the hydraulic jack 23, and the placement portion 33 is separated upward from the cylinder cover 2. Thereafter, as shown in FIG. 17, the reversing device 10 is moved backward, and the entire reversing device 10 is separated from the cylinder cover 2. As a result, the lower part of the cylinder cover 2 is exposed upward. Therefore, maintenance inspection of the lower part of the cylinder cover 2 can be performed.

  By reversing the above procedure, the inverted cylinder cover 2 can be fixed on the cylinder liner 1. That is, after the reversing device 10 is moved to the position shown in FIG. 16, as shown in FIGS. 15 and 14, the fixing rods 35a to 35c are respectively inserted into the rod insertion holes 2i and 2j and the bolt insertion holes 2e. Insert from (opening in upper surface 2a). Next, the fixing rods 35 a to 35 c are fixed to the mounting portion 33 by the nut 36. Thereby, the cylinder cover 2 is fixed to the mounting portion 33. Thereafter, as shown in FIG. 13, the movable member 21 is moved upward, and the support rod 61 is extracted from the bolt insertion holes 2c, 2d, 2f, 2g. Next, as shown in FIGS. 12 and 11, the rotating member 31 is reversed and the vertical direction of the cylinder cover 2 is returned to the original vertical direction. Thereafter, the fixing nut 37 is removed from the fixing bolts 35a to 35c. Then, as shown in FIG. 10, the cylinder cover 2 is lifted from the placement portion 33 by the wire B and the chain block, and placed on the cylinder liner 1 and fixed.

  Thus, according to the reversing device 10 described above, there is no need to touch the cylinder cover 2 when the cylinder cover 2 is reversed. Therefore, not only the labor required for the reversing work can be almost eliminated, but also the danger to the operator can be eliminated.

In addition, this invention is not limited to said embodiment, A various modification is employable in the range which does not deviate from the summary.
For example, in the above embodiment, the frame 11 is constituted by the pair of base materials 12, the connecting member 13, the pair of support members 15, and the upper connecting member 16, but the frame 11 may have another structure. Is possible.
Further, in the above embodiment, in order to support the inverted cylinder cover 2 on the support rod 61, the movable member 21 is provided and the rotating member 31 is moved in the vertical direction. When the cover 2 is supported by a forklift or the like, it is not necessary to move the rotating member 31 in the vertical direction. Therefore, in such a case, the movable member 21 and the hydraulic jack (moving means) 27 become unnecessary.
In the above embodiment, the fixing rods 35a to 35c are detachably provided on the mounting portion 33, and the fixing nut 37 is detachably provided to the fixing rods 35a to 35c. ˜35c may be detachably provided on the mounting portion 33, the fixing nut 37 may be detachably attached to the fixing rods 35a to 35c, and conversely, the fixing nut 37 may be detachably attached to the fixing rods 35a to 35c. When provided, the fixing rods 35 a to 35 c may be provided on the mounting portion 33 so as not to be detachable.

  The cylinder cover reversing device according to the present invention can be used for reversing a cylinder cover of a large engine up and down 180 degrees.

2 Cylinder head 2c Bolt insertion hole (through hole)
2d Bolt insertion hole (through hole)
2e Bolt insertion hole (through hole)
2f Bolt insertion hole (through hole)
2g Bolt insertion hole (through hole)
2i Rod insertion hole (through hole)
2j Rod insertion hole (through hole)
DESCRIPTION OF SYMBOLS 10 Cylinder head reversing device 11 Frame 21 Movable member 23 Hydraulic jack (moving means)
31 Rotating member 33 Mounting portion 35a Fixed rod 35b Fixed rod 35c Fixed rod 37 Fixed nut (support member)
40 Rotating means 51 Introduction space 61 Support rod 61a Annular protrusion (contact part)

Claims (4)

A reversing device for reversing the top and bottom of a cylinder head having a plurality of through-holes with the axis line directed vertically.
A frame, a rotating member supported so as to be rotatable by approximately 180 ° between a support position and a reversing position about an axis horizontal to the frame, and a rotating means provided on the frame and rotating the rotating member. The rotating member is provided with a mounting portion on which the cylinder head is mounted in a state in which the axis of the through hole is directed in the vertical direction when the rotating member is located at the support position. A plurality of fixed rods that are inserted through the through holes of the cylinder head in a penetrating state are erected on the mounting portion, and the rotating member is inverted at a tip portion protruding from the through hole of the fixed rod. A support member that supports the cylinder head when rotated to a position, the fixed rod is detachably provided on the mounting portion, and the support member is detachable from the fixed rod. That either one of the be provided is adopted reversing apparatus for a cylinder head according to claim. In the frame, a movable member is provided so that the position of the movable member can be adjusted in the vertical direction, and a moving means for moving the movable member in the vertical direction is provided. The rotating member and the rotating means are provided in the movable member. The reversing device for a cylinder head according to claim 1 .   The fixed rod is detachably provided on the mounting portion in the axial direction of the fixed rod so that the fixed rod can be extracted from the through hole in the axial direction thereof. The reversing device for a cylinder head as described. When the cylinder head is inverted while standing on the floor, a plurality of through holes inserted into the other through holes in the through holes of the cylinder head through which the fixed rod is not inserted The support rod is further provided, and an abutting portion for supporting the cylinder head by being abutted against the upper surface of the inverted cylinder head is provided at an intermediate portion in the vertical direction of the support rod,
The frame is provided with traveling wheels so that the frame can travel on the floor surface, and the frame is inverted to a position where the support rod can be inserted into the other through hole. 4. The reversing device for a cylinder head according to claim 2, wherein an introduction space having an open end on the front side in the traveling direction is formed so as to enter the lower side of the cylinder head.

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