Attachment / detachment jig

Abstract

The present invention provides a highly versatile attachment / detachment jig that allows for easy insertion and removal of the object to be attached into the mounting hole formed in the mounting body. [Solution] The attachment / detachment jig 1 of the embodiment is attached to the on / off valve 106 and comprises a feed screw portion 2 extending axially in the valve insertion recess 111, a nut portion 3 that engages with the feed screw portion 2, a support shaft portion 4 attached to the engine block 105, and a connecting portion 5 that is connected to the nut portion 3 and the support shaft portion 4 and connects the feed screw portion 2 and the support shaft portion 4. The connecting portion 5 is provided so as to be able to adjust the axial distance between the feed screw portion 2 and the support shaft portion 4.

Description

Technical Field

[0001] The present invention relates to a detachable jig.

Background Art

[0002] For example, a fuel pump is used in an actuator of a fuel injection system for a marine engine. Some fuel pumps reciprocate a piston in a cylinder to send out fuel. In some cases, the reciprocating motion of this cylinder is controlled using a pressure accumulator. The pressure accumulator reciprocates the cylinder by controlling the pressure of the hydraulic oil acting on the cylinder. The pressure accumulator includes two on-off valves provided in the middle of a flow path formed in the engine block of the marine engine, and a solenoid valve that controls the opening and closing operations of each on-off valve.

[0003] More specifically, an on-off valve insertion hole communicating with the flow path is formed in the engine block. The on-off valve is attached to the engine block by inserting the on-off valve into this on-off valve insertion hole. For example, an O-ring is provided on the on-off valve. Thereby, the space between the engine block and the on-off valve is sealed.

[0004] The solenoid valve is provided on the engine block via a pipe seat, for example. A pilot flow path communicating with the flow path of the engine block is formed in the pipe seat. The pipe seat is fixed by fastening bolts to a female screw portion formed in the engine block. The solenoid valve is connected to the pilot flow path of such a pipe seat. Thereby, the opening and closing operations of the two on-off valves are switched by the pilot pressure generated by the solenoid valve, and the cylinder reciprocates.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] Incidentally, inserting or removing a mounting object, such as an on-off valve, into a mounting hole (on-off valve insertion hole) formed in a mounting body such as an engine block requires considerable effort to prevent damage to the O-ring and impair the sealing performance, as well as to prevent damage to the mounting object itself. In particular, shut-off valves used in marine engines have the problem of being heavy, which makes them a burden to operate.

[0007] To reduce the workload, it is conceivable to prepare a jig that utilizes fixing holes, such as female threaded sections, formed on the engine block or other components for attaching other parts. That is, the jig is fixed to the fixing hole, and the position of the object to be attached is stabilized through this jig before the object to be attached is inserted into or removed from the mounting hole. In such cases, the positional relationship between the mounting holes and the fixing holes varies depending on the design of the engine block, etc. Therefore, it is necessary to prepare a jig each time to match the position of the mounting holes and fixing holes. Consequently, there was a problem in that the number of parts required to insert or remove the object to be mounted into or out of the mounting holes increased.

[0008] The present invention provides a highly versatile attachment / detachment jig that allows for easy insertion and removal of an object to be attached into a mounting hole formed in the mounting body. [Means for solving the problem]

[0009] A detachable jig according to one aspect of the present invention is a detachable jig for inserting and removing an object to be mounted into a mounting hole formed in a mounting body, comprising: a feed screw portion attached to the object to be mounted and extending in the axial direction of the mounting hole; a nut portion that engages with the feed screw portion; a support shaft portion attached to the mounting body; and a connecting portion connected to the nut portion and the support shaft portion, which adjusts the axial distance between the feed screw portion and the support shaft portion.

[0010] With this configuration, when the lead screw is rotated, the lead screw is pushed out toward the mounting hole relative to the nut, or pulled in toward the opposite side of the mounting hole. Therefore, the object to be mounted can be inserted into the mounting hole along the axial direction of the mounting hole, or removed from the mounting hole. Thus, the object to be mounted can be easily inserted into and removed from the mounting hole formed in the mounting object. Furthermore, the connecting section adjusts the distance between the lead screw and the support shaft. Therefore, by adjusting the distance between the axes to match the shape of the mounting body, the attachment / detachment jig can be used with various mounting bodies. Thus, a highly versatile attachment / detachment jig can be provided.

[0011] In the above configuration, multiple support shafts are provided.

[0012] Another aspect of the present invention relates to a detachable jig for inserting and removing an object to be mounted into a mounting hole formed in a mounting body, comprising: a feed screw portion attached to the object to be mounted and extending in the axial direction of the mounting hole; a nut portion that engages with the feed screw portion; a plurality of support shaft portions attached to the mounting body; and connecting portions separately connected to the nut portion and each of the support shaft portions, respectively, for adjusting the distance between adjacent support shaft portions in the circumferential direction.

[0013] With this configuration, when the lead screw is rotated, the lead screw is pushed out toward the mounting hole relative to the nut, or pulled in toward the opposite side of the mounting hole. This allows the object to be mounted to be inserted into the mounting hole along the axial direction of the mounting hole, and the object to be mounted to be removed from the mounting hole. In addition, since the lead screw can be supported by multiple support shafts, the position of the lead screw can be stabilized. Therefore, the object to be mounted can be easily inserted into and removed from the mounting hole formed in the mounting body. Furthermore, the connecting section adjusts the distance between adjacent support shaft sections in the circumferential direction. Therefore, by adjusting the distance between each support shaft section according to the shape of the mounting body, the attachment / detachment jig can be used with various mounting bodies. Thus, a highly versatile attachment / detachment jig can be provided.

[0014] Another aspect of the present invention relates to a detachable jig for inserting and removing an object to be mounted into a mounting hole formed in a mounting body, comprising: a feed screw portion attached to the object to be mounted and extending in the axial direction of the mounting hole; a nut portion that engages with the feed screw portion; a plurality of support shaft portions attached to the mounting body; and connecting portions separately connected to the nut portion and each of the support shaft portions, for adjusting the axial distance between the feed screw portion and the support shaft portions, and for adjusting the distance between adjacent support shaft portions in the circumferential direction.

[0015] With this configuration, when the lead screw is rotated, the lead screw is pushed out toward the mounting hole relative to the nut, or pulled in toward the opposite side of the mounting hole. This allows the object to be mounted to be inserted into the mounting hole along the axial direction of the mounting hole, and the object to be mounted to be removed from the mounting hole. In addition, since the lead screw can be supported by multiple support shafts, the position of the lead screw can be stabilized. Therefore, the object to be mounted can be easily inserted into and removed from the mounting hole formed in the mounting body. Furthermore, the connecting section adjusts the distance between the lead screw section and the support shaft section, as well as the distance between adjacent support shaft sections in the circumferential direction. Therefore, by adjusting the distance between the axes and the distance between each support shaft section according to the shape of the mounting body, the attachment / detachment jig can be used with various mounting bodies. Thus, a highly versatile attachment / detachment jig can be provided.

[0016] In the above configuration, the nut portion comprises a cylindrical nut body that engages with the lead screw portion and has a male thread portion formed on its outer circumference, a first nut provided on the nut body into which the lead screw portion is inserted, and a second nut that engages with the male thread portion, the connecting portion is formed to be elongated in one direction and comprises two connecting plates positioned between the first nut and the second nut, each of which comprises a plate body provided on the nut body so as to be slidable in the radial direction, and a support shaft mounting portion provided on the plate body radially outward from the nut body and to which the support shaft portion is attached.

[0017] In the above configuration, the nut portion comprises a cylindrical nut body that engages with the lead screw portion and has a male thread portion formed on its outer circumference, a first nut provided on the nut body into which the lead screw portion is inserted, and a second nut that engages with the male thread portion, the connecting portion is formed to be elongated in one direction and comprises two connecting plates positioned between the first nut and the second nut, each of which comprises a plate body rotatably provided on the nut body and a support shaft mounting portion provided radially outward from the nut body on the plate body and to which the support shaft portion is attached.

[0018] In the above configuration, the nut portion comprises a cylindrical nut body that engages with the lead screw portion and has a male thread portion formed on its outer circumference, a first nut provided on the nut body into which the lead screw portion is inserted, and a second nut that engages with the male thread portion, the connecting portion is formed to be elongated in one direction and comprises two connecting plates positioned between the first nut and the second nut, each of the connecting plates comprises a plate body formed in the unidirectional elongated oval shape and having an elongated hole into which the nut body is inserted, and a support shaft mounting portion formed radially outward from the elongated hole in the plate body in the lead screw portion and to which the support shaft portion is attached.

[0019] In the above configuration, the connecting portion includes a support plate provided on the nut portion, two upper shafts provided on both sides of the nut portion of the support plate with the nut portion interposed therebetween, and two rails provided on each of the upper shafts so as to be slidable in the radial direction. On the side opposite to the upper shaft of each rail, the support shaft portion is rotatably provided.

[0020] In the above configuration, the connecting portion includes a support plate provided on the nut portion, two upper shafts provided on both sides of the nut portion of the support plate with the nut portion interposed therebetween, and two rails provided on each of the upper shafts so as to be rotatable. On the side opposite to the upper shaft of each rail, the support shaft portion is rotatably provided.

[0021] In the above configuration, the connecting portion includes a support plate provided on the nut portion, two upper shafts provided on both sides of the nut portion of the support plate with the nut portion interposed therebetween and extending along the axial direction of the feed screw portion, and two rails having insertion holes into which each of the upper shafts is inserted and extending in the radial direction of the upper shaft. The insertion holes are formed in an oval shape along the rails, and on the side opposite to the upper shaft of each rail, the support shaft portion is rotatably provided.

[0022] In the above configuration, the attachment body includes an engine block used for a marine engine, and the attached body includes an on-off valve that is connected to a flow path formed in the engine block and drives a hydraulic actuator used for the marine engine.

Advantages of the Invention

[0023] The above-described attaching / detaching jig can easily insert and remove the attached body into / from the attachment hole formed in the attachment body, and can enhance versatility.

Brief Description of the Drawings

[0024] [Figure 1]This figure shows the state of use of the attachment / detachment jig in the first embodiment of the present invention. [Figure 2] This is a perspective view of the attachment / detachment jig in the first embodiment of the present invention. [Figure 3] This is a perspective view of the valve holder in the first embodiment of the present invention. [Figure 4] This is an exploded perspective view of the nut portion in the first embodiment of the present invention. [Figure 5] This figure shows the state of use of the attachment / detachment jig in the second embodiment of the present invention. [Figure 6] This is a perspective view of a detachable jig according to a second embodiment of the present invention. [Modes for carrying out the invention]

[0025] Next, embodiments of the present invention will be described with reference to the drawings.

[0026] [First Embodiment] <Fuel supply device> <Attachment / Detachment Tool> Figure 1 shows the state of use of the attachment / detachment jig 1 in the first embodiment. Figure 2 is a perspective view of the attachment / detachment jig 1. As shown in Figures 1 and 2, the attachment / detachment jig 1 is used to attach or detach the on-off valve 106 to the engine block 105 that constitutes the fuel supply and exhaust system 100.

[0027] First, let me explain the fuel supply and exhaust system 100. The fuel supply and exhaust system 100 is a device for supplying fuel to a marine engine (not shown) and for exhausting exhaust gases from a marine engine (not shown). An on / off valve 106 is used to operate the fuel injection valve and the exhaust valve for exhausting the exhaust gases.

[0028] In addition to the on-off valve 106, a pipe seat (not shown) is fixed to the engine block 105. Multiple female threaded portions 105b for fixing the pipe seat (not shown) are formed on the pipe seat fixing surface 105a of the engine block 105. A valve insertion recess 111 for inserting the on-off valve 106 is formed on the pipe seat fixing surface 105a of the engine block 105. The valve insertion recess 111 is connected to a flow path 110 formed in the engine block 105 that connects to the injection valve and exhaust valve. The valve insertion recess 111 has an opening 111a that opens to the outside on the pipe seat fixing surface 105a side of the engine block 105. The on-off valve 106 is inserted into the valve insertion recess 111 through this opening 111a. A detachable jig 1 is used to insert the on-off valve 106 into the valve insertion recess 111.

[0029] The attachment / detachment jig 1 is used by attaching it to two of the multiple female threaded portions 105b of the engine block 105. The attachment / detachment jig 1 is used in a temporary insertion state in which the on / off valve 106 is partially inserted into the valve insertion recess 111. The attachment / detachment jig 1 comprises a lead screw portion 2 attached to the on / off valve 106, a nut portion 3 that engages with the lead screw portion 2, two support shaft portions 4 that are separately attached to the engine block 105, and a connecting portion 5 that connects the lead screw portion 2 and each support shaft portion 4.

[0030] <Lead screw section> The feed screw section 2 comprises a round-shaped male threaded rod 6, a valve holder 8 rotatably supported on the first end 6a of the male threaded rod 6 via a bearing 7, and a handle 9 provided on the second end 6b of the male threaded rod 6 opposite to the first end 6a.

[0031] Figure 3 is a perspective view of the valve holder 8. As shown in Figures 1 to 3, the valve holder 8 comprises a rectangular plate-shaped bearing boss 11 on which a bearing 7 is provided, a disc-shaped base portion 12 integrally molded on the side of the bearing boss 11 opposite to the male threaded rod 6, and a holder body 13 integrally molded on the side of the base portion 12 opposite to the bearing boss 11. The holder body 13 has a cylindrical portion 14 that protrudes from the base portion 12 on the side opposite to the male threaded rod 6. A pair of claw plates 15 are integrally molded at the end of the cylindrical portion 14 opposite to the base portion 12.

[0032] The claw plates 15 are positioned on both sides of the threaded rod 6 when viewed from the axial direction of the threaded rod 6. The outer circumference of the claw plates 15 follows the outer circumference of the cylindrical portion 14. Flat portions 15a are formed on the radially inward side of the claw plates 15. Each claw plate 15 is positioned so that each flat portion 15a is parallel to the others. The flat portions 15a protrude radially inward from the inner circumference of the cylindrical portion 14. The head 106a of the on-off valve 106 is hooked onto this protruding portion. This attaches the valve holder 8 to the on-off valve 106. With the valve holder 8 attached to the on-off valve 106, the on-off valve 106 and the threaded rod 6 are coaxially positioned.

[0033] <Nut part> Figure 4 is an exploded perspective view of the nut portion 3. As shown in Figures 1, 2, and 4, the nut portion 3 comprises a cylindrical nut body 16 that engages with the male threaded rod 6, a first nut 17 integrally molded at the axial end of the nut body 16, and a second nut 18 provided separately from the nut body 16 and the first nut 17. The nut body 16 has a female threaded portion 16a formed on its inner circumferential surface that engages with the male threaded rod 6, and a male threaded portion 16b formed on its outer circumferential surface.

[0034] The first nut 17 has a female thread portion (not shown) that is identical to the female thread portion 16a of the nut body 16. The male threaded rod 6 is continuously engaged with the female thread portion 16a of the first nut 17 and the nut body 16. The outer circumferential surface of the first nut 17 is formed in a hexagonal shape, for example. Six flat surfaces 17a formed on the outer circumferential surface of the first nut 17 each have an insertion hole 17b. The gripping rod 19 can be inserted into each insertion hole 17b.

[0035] The second nut 18 engages with the male threaded portion 16b. The outer surface of the second nut 18 is also formed in a hexagonal shape, for example. Six flat surfaces 18a formed on the outer surface of the second nut 18 each have an insertion hole 18b. A gripping rod 19 can be inserted into each insertion hole 18b.

[0036] <Support shaft section> The support shaft portion 4 comprises a shaft body 21 and a male threaded portion 22 integrally molded at the axial end of the shaft body 21. The outer diameter of the male threaded portion 22 is smaller than the outer diameter of the shaft body 21. Therefore, a stepped surface 21a is formed at the end of the shaft body 21. This support shaft portion 4 is attached to the engine block 105 by tightening the male threaded portion 22 to the female threaded portion 105b of the engine block 105. At this time, the stepped surface 21a of the support shaft portion 4 abuts against the pipe seat fixing surface 105a of the engine block 105. This positions the support shaft portion 4.

[0037] Each shaft body 21 has two set collars 23 attached to it. A connecting part 5 is attached between the two set collars 23 on each shaft body 21.

[0038] <Connection part> The connecting portion 5 comprises two connecting plates 25, 26 (a first connecting plate 25 and a second connecting plate 26). Of the two connecting plates 25, 26, the first connecting plate 25 has an oval-shaped first plate body 27 that is elongated in the radial direction of the male threaded rod 6. The thickness direction of the first plate body 27 coincides with the axial direction of the male threaded rod 6. The first plate body 27 has an elongated hole 27a formed in most of its center.

[0039] The elongated hole 27a is formed in an elongated oval shape along the longitudinal direction of the first plate body 27. The nut body 16 is inserted into the elongated hole 27a. When the nut body 16 is inserted into the elongated hole 27a, the first plate body 27 is positioned between the first nut 17 and the second nut 18.

[0040] The first end 27b of the first plate body 27 in the longitudinal direction is formed in an arc shape when viewed from the thickness direction of the first plate body 27. A support shaft mounting portion 30 is integrally molded at the second end 27c of the first plate body 27, opposite to the first end 27b in the longitudinal direction. The support shaft mounting portion 30 comprises a plate-shaped gripping portion 28 and a locking portion 29 provided on the gripping portion 28. The gripping portion 28 is integrally molded with the first connecting plate 25.

[0041] The thickness direction of the gripping portion 28 coincides with the thickness direction of the first plate body 27. The thickness of the gripping portion 28 is greater than the thickness of the first plate body 27. For this reason, a stepped portion 28c is formed at the end of the gripping portion 28 on the first plate body 27 side. The stepped portion 28c is formed in an arc shape similar to the first end 27b of the first plate body 27. The gripping portion 28 has a receiving recess 28b formed on both sides and on one side 28a in the short direction of the first connecting plate 25, which is open. The shaft body 21 of the support shaft portion 4 is inserted into the receiving recess 28b.

[0042] The locking portion 29 is positioned on one side 28a of the gripping portion 28. The locking portion 29 opens and closes the side 28a of the gripping portion 28 in the receiving recess 28b. More specifically, the locking portion 29 is formed in a rod shape and is provided to slide along the side 28a of the gripping portion 28. A hook portion 29a is provided at one end of the locking portion 29 in the axial direction. The hook portion 29a is detachable from the gripping portion 28. As a result, the locking portion 29 can release (open) or lock (maintain the closed state of the receiving recess 28b) the side 28a of the gripping portion 28 in the receiving recess 28b.

[0043] Of the two connecting plates 25 and 26, the basic configuration of the second connecting plate 26 is the same as that of the first connecting plate 25. The second connecting plate 26 is positioned symmetrically with respect to the first connecting plate 25, with the male threaded rod 6 at its center. In other words, the second connecting plate 26 has an oval-shaped second plate body 31 that is elongated in the radial direction of the male threaded rod 6. The second plate body 31 has an elongated hole 31a formed in most of its center. The nut body 16 is inserted into the elongated hole 31a. Therefore, when the nut body 16 is inserted into the elongated hole 31a, the second plate body 31 is positioned between the first nut 17 and the second nut 18.

[0044] The thickness of the second plate body 31 is greater than the thickness of the first plate body 27. More specifically, the thickness of the second plate body 31 is the same as the thickness of the gripping portion 28. Therefore, both sides of the gripping portion 28 in the thickness direction and both sides of the second plate body 31 in the thickness direction are located on the same plane.

[0045] In this second plate body 31, a slit 32 is formed in the center in the thickness direction. The thickness of the slit 32 is the same as or slightly thicker than the thickness of the first plate body 27. The slit 32 is formed throughout the entire second plate body 31. The first plate body 27 is inserted into the slit 32. In this state, the first plate body 27 is sandwiched by the second plate body 31.

[0046] The first end 31b of the second plate body 31 in the longitudinal direction is formed in an arc shape when viewed from the thickness direction of the second plate body 31. This arc shape is identical to the arc shape of the stepped portion 28c formed on the gripping portion 28 of the first connecting plate 25. A support shaft mounting portion 30 is integrally molded at the second end 31c of the second plate body 31, opposite to the first end 31b in the longitudinal direction.

[0047] The support shaft mounting portion 30 integrally molded on the second plate body 31 and the support shaft mounting portion 30 integrally molded on the first plate body 27 have the same configuration. Therefore, the explanation of the support shaft mounting portion 30 integrally molded on the second plate body 31 will be omitted, as it will be given the same reference numerals as the support shaft mounting portion 30 integrally molded on the first plate body 27. Although not shown in the illustration, the side of the gripping portion 28 of the second connecting plate 26 that is exposed within the slit 32 is formed in the same arc shape as the first end portion 27b of the first plate body 27.

[0048] <Method for installing and removing an on / off valve using a detachable jig> Next, we will explain how to attach the on-off valve 106 to the engine block 105 and how to remove the on-off valve 106 from the engine block 105 using the attachment / detachment jig 1. First, I will explain how to attach the on-off valve 106 to the engine block 105.

[0049] In this case, the on-off valve 106 is partially inserted into the valve insertion recess 111 of the engine block 105, leaving it in a temporary inserted state. After this, the support shaft portion 4 is tightened to the female thread portion 105b of the engine block 105. Any two of the multiple female thread portions 105b can be selected to tighten the support shaft portion 4. However, it is preferable to select the two female thread portions 105b located on either side of the on-off valve 106. The reason for this will be explained later.

[0050] Next, the valve holder 8 is attached to the head 106a of the shut-off valve 106. At this time, the second nut 18 of the nut portion 3 is loosened. With the valve holder 8 attached to the shut-off valve 106, the shut-off valve 106 and the male threaded rod 6 are located coaxially. In this state, the male threaded rod 6 and the support shaft portion 4 are parallel. Next, the locking parts 29 of each gripping part 28 are released, and the position of each gripping part 28 is adjusted to the position of a separate support shaft part 4.

[0051] Here, each plate body 27 and 31 of each connecting plate 25 and 26 has elongated holes 27a and 31a formed therein. Therefore, when the second nut 18 is loosened, each connecting plate 25 and 26 can slide freely relative to the nut portion 3. In other words, each connecting plate 25 and 26 can adjust the distance between the lead screw portion 2 and the support shaft portion 4. In addition, when the second nut 18 is loosened, each connecting plate 25, 26 can rotate freely around the male threaded rod 6 relative to the nut portion 3. In other words, by rotating each connecting plate 25, 26, the distance between two adjacent support shaft portions 4 in the circumferential direction can be adjusted.

[0052] Furthermore, the first plate body 27 is inserted into the slit 32 of the second plate body 31, and the first plate body 27 is held in place by the second plate body 31. This prevents the connecting plates 25 and 26 from becoming distorted or loose. Therefore, with the valve holder 8 attached to the on-off valve 106, the positions of each gripping portion 28 can be easily aligned with the positions of separate support shaft portions 4.

[0053] Next, the receiving recesses 28b of each gripping portion 28 are pushed into the shaft body 21 of each support shaft portion 4. After this, the locking portion 29 of each gripping portion 28 is locked. This connects each support shaft portion 4 to each gripping portion 28 (connecting plates 25, 26). At this time, the two set collars 23 attached to the shaft body 21 of each support shaft portion 4 are positioned on both sides of the gripping portion 28. This restricts the axial movement of each connecting plate 25, 26 relative to the support shaft portion 4.

[0054] Next, the second nut 18 is tightened. The first nut 17 is integrally molded with the nut body 16. Therefore, by tightening the second nut 18, the plate bodies 27 and 31 are pressed against and fixed by the second nut 18 and the first nut 17. As a result, the position of the nut portion 3 relative to each support shaft portion 4 is fixed. When tightening the second nut 18, one gripping rod 19 can be inserted into each of the insertion holes 17b and 18b of the nuts 17 and 18, respectively, and the second nut 18 can be tightened by gripping these gripping rods 19. In this way, the second nut 18 can be tightened without using any tools.

[0055] Next, the male threaded rod 6 is rotated using the handle 9 and pushed toward the on / off valve 106. At this time, the operability of the handle 9 can be improved by operating the handle 9 while gripping the gripping rod 19.

[0056] When the male threaded rod 6 is rotated and pushed toward the shut-off valve 106, the valve holder 8 attached to the shut-off valve 106 is rotatably supported relative to the male threaded rod 6. Therefore, the valve holder 8 and the shut-off valve 106 do not rotate together with the male threaded rod 6. Since the nut portion 3 is fixed, the male threaded rod 6 and the shut-off valve 106 do not lose their position. Each connecting plate 25, 26 is restricted from axial movement relative to the support shaft portion 4. Therefore, the male threaded rod 6 and the shut-off valve 106 are precisely pushed toward the valve insertion recess 111 along the axial direction. As a result, the shut-off valve 106 is fully inserted into the valve insertion recess 111, and the installation of the shut-off valve 106 to the engine block 105 is completed.

[0057] To remove the on-off valve 106 from the engine block 105, simply rotate the male threaded rod 6 in the reverse direction using the handle 9. This will pull the male threaded rod 6 into the nut portion 3, and the on-off valve 106 will be removed from the valve insertion recess 111. This completes the removal of the on-off valve 106 from the engine block 105.

[0058] As described above, the attachment / detachment jig 1 in the first embodiment comprises a lead screw portion 2, a nut portion 3, a support shaft portion 4, and a connecting portion 5. Therefore, when the lead screw portion 2 is rotated, the lead screw portion 2 slides along the axial direction relative to the nut portion 3. As a result, the on-off valve 106 is pushed into the valve insertion recess 111 along the axial direction by the lead screw portion 2, or pulled out of the valve insertion recess 111 along the axial direction. At this time, the lead screw portion 2 (nut portion 3) can be supported by the two support shaft portions 4. As a result, the position of the lead screw portion 2 can be stabilized. Therefore, the on-off valve 106 can be easily inserted into and removed from the valve insertion recess 111.

[0059] Furthermore, the connecting portion 5 adjusts the axial distance between the lead screw portion 2 and the support shaft portion 4, as well as the distance between adjacent support shaft portions 4 in the circumferential direction. Therefore, the axial distance between the lead screw portion 2 and the support shaft portion 4 can be adjusted according to the position of the female screw portion 105b formed in the engine block 105, and the distance between adjacent support shaft portions 4 in the circumferential direction can be adjusted. Thus, the attachment / detachment jig 1 can be used with various fuel supply and exhaust devices 100, thereby increasing the versatility of the attachment / detachment jig 1.

[0060] More specifically, the detachable jig 1 comprises a nut body 16, a first nut 17 integrated with the nut body 16, and a second nut 18 that engages with the male threaded portion 16b of the nut body 16. This configuration allows the connecting portion 5 to be fixed to the nut portion 3 with a simple structure, and also allows the male threaded rod 6 to slide relative to the nut portion 3.

[0061] More specifically, the connecting portion 5 of the attachment / detachment jig 1 comprises two oval-shaped plate bodies 27 and 31, and a gripping portion 28 integrally molded to each plate body 27 and 31. Each plate body 27 and 31 has elongated oval-shaped holes 27a and 31a that are long in the longitudinal direction of the plate bodies 27 and 31. By inserting the nut body 16 into these elongated holes 27a and 31a, the axial distance between the feed screw portion 2 and the support shaft portion 4 can be adjusted, as well as the distance between adjacent support shaft portions 4 in the circumferential direction. With this simple structure, it is possible to adjust the axial distance between the feed screw portion 2 and the support shaft portion 4, and to adjust the distance between adjacent support shaft portions 4 in the circumferential direction.

[0062] Furthermore, since the lead screw section 2 is supported by two support shaft sections 4 and two connecting plates 25 and 26, the position of the lead screw section 2 can be stabilized compared to, for example, the case where there is only one support shaft section 4. This makes it even easier to insert and remove the on-off valve 106 into the valve insertion recess 111. By positioning the support shaft sections 4 on both sides of the on-off valve 106, the position of the lead screw section 2 can be stabilized more reliably.

[0063] When the attachment / detachment jig 1 is not in use, the plate bodies 27 and 31 can be made as compact as possible by sliding them so that their gripping portions 28 are close together. The stepped portion 28c formed on the first end 31b of the second plate body 31 and the gripping portion 28 of the first connecting plate 25 are both formed in the same arc shape. Therefore, the first end 31b of the second plate body 31 is housed in this stepped portion 28c. Similarly, the first end 27b of the first plate body 27 is housed in the side of the gripping portion 28 of the second connecting plate 26 that is exposed in the slit 32. Thus, the position of the attachment / detachment jig 1 when not in use can be stabilized.

[0064] In the first embodiment described above, the case in which the attachment / detachment jig 1 has two support shaft portions 4 was explained. However, it is not limited to this, and the attachment / detachment jig 1 may have at least one support shaft portion 4. The attachment / detachment jig 1 may have three or more support shaft portions 4. The number of connecting plates 25, 26 may be changed according to the number of support shaft portions 4. Each support shaft portion 4 is attached to the female thread portion 105b of the engine block 105.

[0065] In the first embodiment described above, the case in which the connecting portion 5 adjusts the axial distance between the lead screw portion 2 and the support shaft portion 4, or adjusts the distance between adjacent support shaft portions 4 in the circumferential direction, was explained. To achieve this, the case in which elongated holes 27a and 31a into which the nut body 16 is inserted are formed in each plate body 27 and 31 was explained. However, it is not limited to this, and the connecting portion 5 may be configured to adjust only the axial distance between the lead screw portion 2 and the support shaft portion 4. In this case, each connecting plate 25 and 26 should be provided so as to be slidable relative to the nut body 16.

[0066] Alternatively, the connecting portion 5 may be configured to adjust only the distance between adjacent support shaft portions 4 in the circumferential direction. In this case, the attachment / detachment jig 1 comprises two or more support shaft portions 4. Each connecting plate 25, 26 may be rotatably mounted on the nut body 16.

[0067] In the first embodiment described above, the case was explained in which the first nut 17 of the nut portion 3 has a female thread portion (not shown) that is identical to the female thread portion 16a of the nut body 16. The case was explained in which the male thread rod 6 is inserted into the first nut 17 by continuously engaging the female thread portion 16a of the first nut 17 and the nut body 16. However, the invention is not limited to this, and the first nut 17 may be configured so that the male thread rod 6 can be inserted regardless of whether or not it is engaged with the male thread rod 6. The first nut 17 may be provided on the nut body 16. For example, both nuts 17 and 18 may be engaged with the male thread portion 16b of the nut body 16. Even in this configuration, the same effects as in the first embodiment described above are achieved.

[0068] In the first embodiment described above, the case in which the outer surfaces of each nut 17, 18 are formed in a hexagonal shape was explained. However, it is not limited to this, and the outer surfaces of the nuts 17, 18 can be any shape. Preferably, the outer surfaces of the nuts 17, 18 should be shaped so that a tool such as a wrench can be used.

[0069] In the first embodiment described above, the method of attaching the on-off valve 106 to the engine block 105 using the attachment / detachment jig 1 was described in which the valve holder 8 is attached to the head 106a of the on-off valve 106, and then the support shafts 4 and gripping parts 28 (connecting plates 25, 26) are connected. However, the method is not limited to this, and the valve holder 8 may be attached to the head 106a of the on-off valve 106 after the support shafts 4 and gripping parts 28 (connecting plates 25, 26) have been connected. The order of the attachment method does not matter as long as the positions of the lead screw part 2 and the support shaft part 4 can be adjusted.

[0070] In the first embodiment described above, two set collars 23 are provided on the shaft body 21 of each support shaft portion 4, and the axial movement of each connecting plate 25, 26 relative to the support shaft portion 4 is restricted. However, the invention is not limited to this, and it is sufficient as long as the axial movement of each connecting plate 25, 26 relative to the support shaft portion 4 is restricted. For example, instead of the set collars 23, a male threaded portion may be formed on the support shaft portion 4, and two nuts may be engaged.

[0071] [Second Embodiment] <Attachment / Detachment Tool> Next, the attachment / detachment jig 201 of the second embodiment will be described based on Figures 4 and 5. Figure 5 shows the state of use of the attachment / detachment jig 201. Figure 6 is a perspective view of the attachment / detachment jig 201. In the following description, the same reference numerals are used for parts identical to those in the first embodiment described above, and their descriptions are omitted.

[0072] As shown in Figures 5 and 6, in the second embodiment, the attachment / detachment jig 201 is used by attaching it to two of the multiple female threaded portions 105b of the engine block 105, similar to the first embodiment described above. The attachment / detachment jig 201 is used to fully insert the on-off valve 106 into the valve insertion recess 111, in a state of temporary insertion where the on-off valve 106 is partially inserted into the valve insertion recess 111, similar to the first embodiment described above.

[0073] The attachment / detachment jig 201 is the same as in the first embodiment described above in that it includes a feed screw portion 2 attached to the on / off valve 106, a nut portion 203 that engages with the feed screw portion 2, two support shaft portions 4 that are separately attached to the engine block 105, and a connecting portion 205 that connects the feed screw portion 2 and each support shaft portion 4.

[0074] The difference between the aforementioned first embodiment and this second embodiment lies in the configuration of the nut portion 3 and connecting portion 5 in the first embodiment and the nut portion 203 and connecting portion 205 in the second embodiment. In the following explanation, for the sake of clarity, with the attachment / detachment jig 201 attached to the engine block 105, the side facing the engine block 105 will be referred to as "down," and the side opposite the engine block 105 will be referred to as "up." In other words, in the feed screw section 2, the valve holder 8 is located at the lower end of the male threaded rod 6. The handle 9 is located at the upper end of the male threaded rod 6.

[0075] <Nut part> The nut portion 203 comprises a cylindrical nut body 216 that engages with the male threaded rod 6, and a flange portion 41 integrally molded to the axial lower part of the nut body 216. A connecting portion 205 is connected to the flange portion 41.

[0076] <Connection part> The connecting portion 205 includes a support plate 51 provided on the nut portion 203, two upper shafts 52 provided on the support plate 51, and two rails 53 separately connected to each upper shaft 52. The support plate 51 is formed in a plate shape, and a shaft insertion hole 51a is formed in the center of its longitudinal direction into which the nut body 216 is inserted. The support plate 51 is positioned on the flange portion 41 of the nut portion 203 with the nut body 216 inserted into the shaft insertion hole 51a. The support plate 51 is fixed to the flange portion 41 by bolts 54. In this way, the connecting portion 205 is connected to the flange portion 41.

[0077] On both sides of the support plate 51 in the longitudinal direction, shaft insertion holes 51a are formed. An upper shaft 52 is inserted into each shaft insertion hole 51a. The upper shaft 52 is, for example, a bolt. The upper shaft 52 has its head 52a facing downwards, and its male threaded portion 52b is inserted into the shaft insertion hole 51a from below. In this state, fixing nuts 55 are engaged with the male threaded portion 52b on both sides of the support plate 51. By tightening these fixing nuts 55, the upper shaft 52 is fixed to the support plate 51.

[0078] The rail 53 is formed in the shape of a rectangular plate that is elongated in the radial direction of the upper shaft 52. The rail 53 has an upper shaft insertion hole 53a and a support shaft insertion hole 53b. The upper shaft insertion hole 53a is formed in an oval shape along the longitudinal direction of the rail 53, from the center of the rail 53 in the longitudinal direction to near one end in the longitudinal direction. The support shaft insertion hole 53b is formed near the other end in the longitudinal direction of the rail 53.

[0079] The upper shaft 52 is inserted into the upper shaft insertion hole 53a. That is, the rail 53 is positioned on the head 52a of the upper shaft 52. An adjustment nut 56 is engaged with the male threaded portion 52b of the upper shaft 52, between the rail 53 and the fixing nut 55. The support shaft insertion hole 53b is circular in shape into which the shaft body 21 of the support shaft section 4 is inserted. Therefore, the support shaft section 4 and the male threaded rod 6 are parallel. The shaft body 21 is prevented from coming out of the rail 53 by set collars 23 attached to both sides of the rail 53. In this way, the support shaft section 4 is connected to the rail 53.

[0080] <Method for installing and removing an on / off valve using a detachable jig> Next, we will explain how to attach the on-off valve 106 to the engine block 105 and how to remove the on-off valve 106 from the engine block 105 using the attachment / detachment jig 201. First, I will explain how to attach the on-off valve 106 to the engine block 105. In this case, the on-off valve 106 is partially inserted into the valve insertion recess 111 of the engine block 105, leaving it in a temporary insertion state. After this, the valve holder 8 is attached to the head 106a of the on-off valve 106. At this time, the adjustment nut 56 is loosened. With the valve holder 8 attached to the on-off valve 106, the on-off valve 106 and the male threaded rod 6 are located coaxially.

[0081] Next, the position of the support shaft portion 4 is aligned with the position of the female thread portion 105b of the engine block 105. Here, the rail 53 of the connecting portion 205 has an upper shaft insertion hole 53a into which the upper shaft 52 is inserted. It is formed in an oval shape along the longitudinal direction of the rail 53. Therefore, when the adjustment nut 56 is loosened, each rail 53 can slide freely relative to the upper shaft 52. In other words, each rail 53 can adjust the distance between the feed screw portion 2 and the support shaft portion 4.

[0082] In addition, when the adjustment nut 56 is loosened, each rail 53 can rotate freely around the upper shaft 52. In other words, by rotating each rail 53, the distance between two adjacent support shaft sections 4 in the circumferential direction can be adjusted.

[0083] The female threaded portion 105b that fastens the support shaft portion 4 can be any two of the multiple female threaded portions 105b. However, it is preferable to select the two female threaded portions 105b that are located on either side of the on-off valve 106. After aligning the support shaft portion 4 with the female thread portion 105b, the support shaft portion 4 is tightened into the female thread portion 105b. Then, the rail 53 is fixed by tightening the adjustment nut 56. As a result, the position of the nut portion 3 relative to each support shaft portion 4 is fixed.

[0084] Next, the handle 9 is used to rotate the male threaded rod 6, pushing it towards the shut-off valve 106. This causes the male threaded rod 6 and the shut-off valve 106 to be precisely pushed axially towards the valve insertion recess 111. As a result, the shut-off valve 106 is fully inserted into the valve insertion recess 111, completing the installation of the shut-off valve 106 to the engine block 105.

[0085] To remove the on-off valve 106 from the engine block 105, simply rotate the male threaded rod 6 in the reverse direction using the handle 9. This will pull the male threaded rod 6 into the nut portion 3, and the on-off valve 106 will be removed from the valve insertion recess 111. This completes the removal of the on-off valve 106 from the engine block 105.

[0086] Therefore, the second embodiment described above provides the same effects as the first embodiment described above. In addition, the attachment / detachment jig 201 can integrate the feed screw portion 2, the nut portion 203, the support shaft portion 4, and the connecting portion 205. This makes it easier to operate the attachment / detachment jig 201 and also makes it easier to manage the attachment / detachment jig 201.

[0087] An upper shaft insertion hole 53a and a support shaft insertion hole 53b were formed separately in the rail 53. The upper shaft insertion hole 53a was formed in an oval shape, while the support shaft insertion hole 53b was simply circular in shape into which the shaft body 21 of the support shaft portion 4 was inserted. As a result, the distance between the axis of the lead screw portion 2 and the support shaft portion 4 can be easily adjusted compared to the case where both the upper shaft 52 and the support shaft portion 4 are configured to slide freely relative to the rail 53.

[0088] In the second embodiment described above, the case in which the attachment / detachment jig 201 has two support shaft portions 4 was described. However, it is not limited to this, and the attachment / detachment jig 201 may have at least one support shaft portion 4. The attachment / detachment jig 201 may have three or more support shaft portions 4. The number of upper shafts 52 and rails 53 may be changed according to the number of support shaft portions 4. Each support shaft portion 4 is attached to the female thread portion 105b of the engine block 105.

[0089] In the second embodiment described above, the case in which the connecting portion 205 adjusts the axial distance between the feed screw portion 2 and the support shaft portion 4, or adjusts the distance between adjacent support shaft portions 4 in the circumferential direction, was described. To achieve this, the case in which an oval-shaped upper shaft insertion hole 53a is formed in each rail 53 was described. However, it is not limited to this, and the connecting portion 205 may be configured to adjust only the axial distance between the feed screw portion 2 and the support shaft portion 4. In this case, each rail 53 should be provided so as to be slidable relative to the upper shaft 52.

[0090] Alternatively, the connecting portion 205 may be configured to adjust only the distance between adjacent support shaft portions 4 in the circumferential direction. In this case, the attachment / detachment jig 201 includes two or more support shaft portions 4. Each rail 53 should be rotatably mounted relative to the upper shaft 52. In addition, the upper shaft insertion hole 53a of each rail 53 may be a simple circular hole, and the support shaft insertion hole 53b may be oval-shaped along the rail 53. The support shaft insertion hole 53b may also be an arc-shaped hole along the circumferential direction. If the support shaft insertion hole 53b is an arc-shaped hole along the circumferential direction, at least the end of each rail 53 on the side where the support shaft insertion hole 53b is formed should be extended in the circumferential direction.

[0091] In the second embodiment described above, the case in which the upper shaft insertion hole 53a and the support shaft insertion hole 53b are formed separately in the rail 53 was explained. However, the invention is not limited to this, and the upper shaft insertion hole 53a and the support shaft insertion hole 53b may be formed to be continuous.

[0092] In the second embodiment described above, the method of attaching the on-off valve 106 to the engine block 105 using the attachment / detachment jig 201 was described in which the valve holder 8 is attached to the head 106a of the on-off valve 106, and then the position of each support shaft portion 4 is aligned with the position of the female thread portion 105b of the engine block 105. However, the method is not limited to this, and the position of each support shaft portion 4 may be aligned with the position of the female thread portion 105b of the engine block 105, and then the valve holder 8 may be attached to the head 106a of the on-off valve 106. The order of the attachment method does not matter as long as the positions of the feed screw portion 2 and the support shaft portion 4 can be adjusted.

[0093] In the second embodiment described above, two set collars 23 were provided on the shaft body 21 of each support shaft portion 4 to restrict the axial movement of each rail 53 relative to the support shaft portion 4. However, the invention is not limited to this, and it is sufficient as long as the axial movement of each rail 53 relative to the support shaft portion 4 is restricted. For example, instead of the set collars 23, a male threaded portion may be formed on the support shaft portion 4 and two nuts may be engaged.

[0094] The present invention is not limited to the embodiments described above, but includes various modifications to the embodiments described above, without departing from the spirit of the invention.

[0095] For example, the first and second embodiments described above described a case in which the attachment / detachment jig 1,201 was used to attach an on-off valve 106 to the engine block 105 of a fuel supply / exhaust device 100 used in a marine engine. However, it is not limited to this, and the attachment / detachment jig 1,201 can also be used when inserting and removing an object to be attached (in this embodiment, the on-off valve 106) into a mounting hole (in this embodiment, the valve insertion recess 111) of a various mounting object instead of the engine block 105.

[0096] Among the embodiments disclosed herein, those composed of multiple objects may be integrated, and conversely, those composed of a single object may be divided into multiple objects. Whether or not they are integrated, the invention can be constructed in a way that achieves its objective. [Explanation of Symbols]

[0097] 1,201...Attachment / Detachment Jig 2... Lead screw section 3,203... Nut part 4…Support shaft section 5,205...Connection part 16,216... Nut body 16b...Male threaded section 17…First nut 18...2nd nut 25…First connecting plate (connecting plate) 26...Second connecting plate (connecting plate) 27…First plate body (plate body) 27a, 31a…long hole 30...Support shaft mounting section 31…Second plate body (plate body) 51…Support plate 52…Upper shaft 53... Rail 53a…Upper shaft insertion hole (insertion hole) 105…Engine block (mounting body) 106... On / off valve (mounted body) 110...flow channel 111... Valve insertion recess (mounting hole)

Claims

1. A detachable jig for inserting and removing an object to be mounted into a mounting hole formed in the mounting body, A feed screw portion attached to the mounting body and extending in the axial direction of the mounting hole, A nut portion that engages with the aforementioned lead screw portion, A support shaft portion attached to the mounting body, It comprises a connecting portion that connects the nut portion and the support shaft portion, The connecting portion is provided so as to be able to adjust the axial distance between the feed screw portion and the support shaft portion. A jig for attaching and detaching.

2. Multiple support shafts are provided. The attachment / detachment jig according to claim 1.

3. A detachable jig for inserting and removing an object to be mounted into a mounting hole formed in the mounting body, A feed screw portion attached to the mounting body and extending in the axial direction of the mounting hole, A nut portion that engages with the aforementioned lead screw portion, Multiple support shaft portions attached to the mounting body, The device comprises a connecting portion that separately connects the nut portion and each of the support shaft portions, The connecting portion is a detachable jig provided so that the distance between each of the adjacent support shaft portions in the circumferential direction can be freely adjusted.

4. A detachable jig for inserting and removing an object to be mounted into a mounting hole formed in the mounting body, A feed screw portion attached to the mounting body and extending in the axial direction of the mounting hole, A nut portion that engages with the aforementioned lead screw portion, Multiple support shaft portions attached to the mounting body, The device comprises a connecting portion that separately connects the nut portion and each of the support shaft portions, The connecting portion is provided in such a way that the distance between the axial axes of the lead screw portion and the support shaft portion, and the distance between adjacent support shaft portions in the circumferential direction, can be freely adjusted. A jig for attaching and detaching.

5. The nut portion is, A cylindrical nut body that engages with the aforementioned lead screw portion and has a male threaded portion formed on its outer surface, A first nut is provided on the nut body into which the lead screw portion is inserted, A second nut that engages with the male threaded portion, Equipped with, The connecting portion is formed to be elongated in one direction and comprises two connecting plates positioned between the first nut and the second nut. Each of the aforementioned connecting plates is A plate body is provided on the nut body so as to be slidable in the radial direction, A support shaft mounting portion is provided on the plate body radially outward from the nut body, to which the support shaft portion is attached, Equipped with, A detachable jig according to any one of claims 2 to 4.

6. The nut portion is, A cylindrical nut body that engages with the aforementioned lead screw portion and has a male threaded portion formed on its outer surface, A first nut is provided on the nut body into which the lead screw portion is inserted, A second nut that engages with the male threaded portion, Equipped with, The connecting portion is formed to be elongated in one direction and comprises two connecting plates positioned between the first nut and the second nut. Each of the aforementioned connecting plates is A plate body is rotatably mounted on the nut body, A support shaft mounting portion is provided on the plate body radially outward from the nut body, to which the support shaft portion is attached, Equipped with, A detachable jig according to any one of claims 2 to 4.

7. The nut portion is, A cylindrical nut body that engages with the aforementioned lead screw portion and has a male threaded portion formed on its outer surface, A first nut is provided on the nut body into which the lead screw portion is inserted, A second nut that engages with the male threaded portion, Equipped with, The connecting portion is formed to be elongated in one direction and comprises two connecting plates positioned between the first nut and the second nut. Each of the aforementioned connecting plates is The connecting plate has a plate body formed in an elongated oval shape that is long in one direction and has an elongated hole into which the nut body is inserted, A support shaft mounting portion is formed radially outward from the elongated hole in the plate body in the feed screw portion, and to which the support shaft portion is attached, Equipped with, A detachable jig according to any one of claims 2 to 4.

8. The aforementioned connecting portion is A support plate provided on the nut portion, Two upper shafts are provided on both sides of the nut portion of the support plate, Each of the upper shafts is provided with two rails that are slidable in the radial direction, Equipped with, Each of the rails has a support shaft portion rotatably provided on the side opposite to the upper shaft. A detachable jig according to any one of claims 2 to 4.

9. The aforementioned connecting portion is A support plate provided on the nut portion, Two upper shafts are provided on both sides of the nut portion of the support plate, Each of the upper shafts is provided with two rails that are rotatably mounted, Equipped with, Each of the rails has a support shaft portion rotatably provided on the side opposite to the upper shaft. A detachable jig according to any one of claims 2 to 4.

10. The aforementioned connecting portion is A support plate provided on the nut portion, Two upper shafts are provided on both sides of the support plate, sandwiching the nut portion, and extending along the axial direction of the feed screw portion, Each of the upper shafts has an insertion hole into which it is inserted, and two rails extending radially from the upper shaft, Equipped with, The insertion hole is formed in an oval shape along the rail, Each of the rails has a support shaft portion rotatably provided on the side opposite to the upper shaft. A detachable jig according to any one of claims 2 to 4.

11. The aforementioned mounting body includes an engine block used in a marine engine, The mounted body is connected to a flow path formed in the engine block and includes an on / off valve that drives a hydraulic actuator used in the marine engine. A detachable jig according to any one of claims 2 to 4.

Images