Jig for loading and unloading

Abstract

This attachment / detachment jig (1) is provided with: a feed screw section (2) which is attached to an opening / closing valve (106) and which extends in the axial direction of a valve insertion recess (111); a nut section (3) that meshes with the feed screw section (2); a support shaft section (4) attached to the engine block (105); and a connecting part (5) which is connected to the nut part (3) and the support shaft part (4) and connects the feed screw part (2) and the support shaft part (4). The connecting section (5) is provided so as to freely adjust the inter-axial distance between the feed screw section (2) and the support shaft section (4).

Description

Jig for loading and unloading Technical Field

[0001] This invention relates to jigs for loading and unloading. Background Technology

[0002] For example, a fuel pump is used in the actuator of the fuel injection system of a marine engine. As such a fuel pump, there are known fuel pumps that deliver fuel by reciprocating the piston of a cylinder. Furthermore, sometimes an accumulator is used to control the reciprocating motion of the cylinder. The accumulator causes the cylinder to reciprocate by controlling the pressure of the working oil acting on the cylinder.

[0003] The accumulator has two on / off valves located in the middle of the flow path of the engine body of the marine engine and a solenoid valve that controls the opening and closing of each valve.

[0004] More specifically, an on / off valve insertion hole communicating with the flow path is formed in the engine block. The on / off valve is installed in the engine block by inserting it into this insertion hole. An O-ring is provided in the on / off valve, for example. Thus, a seal is formed between the engine block and the on / off valve.

[0005] The solenoid valve is mounted on the engine block, for example, via a connector. A pilot flow path communicating with the flow path of the engine block is formed in the connector. The connector is secured by bolts tightened into an internal thread formed in the engine block. The solenoid valve is connected to the pilot flow path of this connector. Thus, the opening and closing actions of the two valves are switched using the pilot pressure generated by the solenoid valve, causing the cylinder to reciprocate.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2015-151963 Summary of the Invention

[0009] The problem the invention aims to solve

[0010] However, in the operation of inserting or removing the valve from the mounting body relative to the mounting hole (valve insertion hole) formed in the mounting body such as the engine block, a lot of labor is required in order to prevent damage to the seal due to damage to the O-ring and to prevent damage to the mounting body itself.

[0011] In particular, the on / off valves used in marine engines are quite heavy. Therefore, this presents a significant challenge in terms of operational workload.

[0012] To reduce workload, for example, jigs that utilize mounting holes formed in the engine block are being considered. Furthermore, the mounting holes could be, for example, internal threads used to mount other components to the engine block.

[0013] In this case, the fixture is fixed to the mounting hole, and the position of the object to be mounted is stabilized by the fixture. Then, after the position of the object to be mounted is stabilized, the object to be mounted is inserted or removed relative to the mounting hole.

[0014] In such cases, the positional relationship between the mounting holes and the fixing holes depends on the design of the engine block, etc., and therefore varies. Consequently, a fixture needs to be prepared each time based on the positional relationship between the mounting holes and the fixing holes. This results in an increase in the number of parts used to insert or remove the mounted component relative to the mounting holes.

[0015] The present invention provides a mounting fixture that allows for easy insertion and removal of the mounted object relative to the mounting hole formed in the mounting body and has high versatility.

[0016] Solution for solving the problem

[0017] An embodiment of the present invention provides a loading and unloading jig for inserting and removing a workpiece relative to a mounting hole formed in a mounting body. The jig includes: a feed screw portion mounted on the workpiece and extending axially along the mounting hole; a nut portion engaging with the feed screw portion; a support shaft portion mounted on the mounting body; and a connecting portion connecting the nut portion and the support shaft portion. The connecting portion is configured to flexibly adjust the axial distance between the feed screw portion and the support shaft portion.

[0018] With this configuration, when the feed screw is rotated, it is either pushed out toward the mounting hole relative to the nut, or pulled in toward the side opposite to the mounting hole. Therefore, the workpiece can be inserted into or removed from the mounting hole along its axial direction. This allows for easy insertion and removal of the workpiece relative to the mounting hole formed in the workpiece.

[0019] Furthermore, the connecting part adjusts the distance between the feed screw and the support shaft. Therefore, by adjusting the distance between the shafts to match the shape of the mounting body, various mounting fixtures can be used for loading and unloading. Thus, a highly versatile loading and unloading fixture can be provided.

[0020] In the above structure, there may also be multiple support shaft portions.

[0021] Another aspect of the present invention provides a loading and unloading jig for inserting and removing a workpiece relative to a mounting hole formed in a mounting body. The jig includes: a feed screw portion mounted on the workpiece and extending axially along the mounting hole; a nut portion engaging with the feed screw portion; a plurality of support shaft portions mounted on the mounting body; and connecting portions respectively connecting the nut portion to each of the support shaft portions. The connecting portions are configured to flexibly adjust the distance between adjacent support shaft portions in the circumferential direction.

[0022] With this configuration, when the feed screw is rotated, it is either pushed out toward the mounting hole relative to the nut, or pulled in toward the side opposite to the mounting hole. Therefore, the workpiece can be inserted into or removed from the mounting hole along its axial direction. Furthermore, since the feed screw is supported by multiple support shafts, its posture is stabilized. Thus, the workpiece can be easily inserted into and removed from the mounting hole formed in the workpiece.

[0023] Furthermore, the connecting part adjusts the distance between adjacent support shafts in the circumferential direction. Therefore, by adjusting the distance between each support shaft to match the shape of the mounting body, a mounting fixture can be used on various mounting bodies. Thus, a highly versatile mounting fixture can be provided.

[0024] Another aspect of the present invention provides a loading and unloading jig for inserting and removing a workpiece relative to a mounting hole formed in a mounting body. The jig includes: a feed screw portion mounted on the workpiece and extending axially along the mounting hole; a nut portion engaging with the feed screw portion; a plurality of support shaft portions mounted on the mounting body; and connecting portions respectively connected to the nut portion and each of the support shaft portions. The connecting portions are configured to flexibly adjust the interaxial distance between the feed screw portion and the support shaft portions and the distance between adjacent support shaft portions in the circumferential direction.

[0025] With this configuration, when the feed screw is rotated, it is either pushed out toward the mounting hole relative to the nut, or pulled in toward the side opposite to the mounting hole. Therefore, the workpiece can be inserted into or removed from the mounting hole along its axial direction. Furthermore, since the feed screw is supported by multiple support shafts, its posture is stabilized. Thus, the workpiece can be easily inserted into and removed from the mounting hole formed in the workpiece.

[0026] Furthermore, the connecting part adjusts the distance between the feed screw and the support shaft, and also adjusts the distance between adjacent support shafts in the circumferential direction. Therefore, the distance between the shafts can be adjusted to fit the shape of the mounting body, or the distance between each support shaft can be adjusted. Therefore, loading and unloading fixtures can be used on various mounting bodies. Therefore, a highly versatile loading and unloading fixture can be provided.

[0027] In the above structure, the nut portion may also include: a cylindrical nut body that meshes with the feed screw portion and has an external thread formed on its outer circumferential surface; a first nut disposed on the nut body, into which the feed screw portion is inserted; and a second nut that meshes with the external thread. Alternatively, the connecting portion may include two connecting plates that are elongated in one direction and disposed between the first nut and the second nut. Alternatively, each connecting plate may include: a plate body that is radially slidably disposed on the nut body; and a support shaft mounting portion disposed on the plate body at a position radially outer of the nut body, for mounting the support shaft portion.

[0028] In the above structure, the nut portion may also include: a cylindrical nut body that meshes with the feed screw portion and has an external thread formed on its outer circumferential surface; a first nut disposed on the nut body, into which the feed screw portion is inserted; and a second nut that meshes with the external thread. Alternatively, the connecting portion may include two connecting plates that are elongated in one direction and disposed between the first nut and the second nut. Alternatively, each connecting plate may include: a plate body rotatably disposed on the nut body; and a support shaft mounting portion disposed on the plate body at a radially outer position than the nut body, for mounting the support shaft portion.

[0029] In the above structure, the nut portion may also include: a cylindrical nut body that meshes with the feed screw portion and has an external thread formed on its outer circumferential surface; a first nut disposed on the nut body, into which the feed screw portion is inserted; and a second nut that meshes with the external thread. Alternatively, the connecting portion may include two connecting plates that are elongated in one direction and disposed between the first nut and the second nut. Alternatively, each connecting plate may include: a plate body having an elongated hole formed in the connecting plate in an elongated oval shape in the one direction for insertion of the nut body; and a support shaft mounting portion formed at a position radially outward of the feed screw portion than the elongated hole in the plate body, for mounting the support shaft portion.

[0030] In the above structure, the connecting part may also include: a support plate disposed on the nut portion; two upper shafts disposed on both sides of the support plate separated from the nut portion; and two tracks respectively disposed radially and movably on each of the upper shafts. Alternatively, the support shaft portion may be rotatably disposed on the side of each track opposite to the upper shaft.

[0031] In the above structure, the connecting part may also include: a support plate disposed on the nut portion; two upper shafts disposed on both sides of the support plate separated from the nut portion; and two tracks rotatably disposed on each of the upper shafts. Alternatively, the support shaft portion may be rotatably disposed on the side of each track opposite to the upper shaft.

[0032] In the above structure, the connecting part may also include: a support plate disposed on the nut portion; two upper shafts disposed on both sides of the support plate across the nut portion and extending axially along the feed screw portion; and two tracks having insertion holes for inserting each of the upper shafts and extending radially along the upper shafts. Alternatively, the insertion holes may be formed into an elongated oval shape along the tracks. Alternatively, the support shaft portion may be rotatably disposed on the side of each track opposite to the upper shaft.

[0033] In the above structure, the mounting body may also include an engine block for a marine engine. Alternatively, the mounted body may include an on / off valve connected to a flow path formed in the engine block and driving a hydraulic actuator for the marine engine.

[0034] The effects of the invention

[0035] The mounting fixture of the present invention can easily insert and remove the mounted object relative to the mounting hole formed in the mounting body, and can improve versatility. Attached Figure Description

[0036] Figure 1 is a diagram showing the usage state of the loading and unloading jig according to the first embodiment of the present invention.

[0037] Figure 2 is a perspective view of the loading and unloading jig according to the first embodiment of the present invention.

[0038] Figure 3 is a perspective view of the valve retainer according to the first embodiment of the present invention.

[0039] Figure 4 is an exploded perspective view of the nut portion according to the first embodiment of the present invention.

[0040] Figure 5 is a diagram showing the usage state of the loading and unloading jig according to the second embodiment of the present invention.

[0041] Figure 6 is a perspective view of the loading and unloading jig according to the second embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures

[0043] 1. 201. Loading and unloading jig; 2. Feed screw section; 3. 203. Nut section; 4. Support shaft section; 5. 205. Connecting section; 16. 216. Nut body; 16b. External thread section; 17. First nut; 18. Second 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 body (mounting body); 106. On / off valve (mounted body); 110. Flow path; 111. Valve insertion recess (mounting hole). Detailed Implementation

[0044] Next, embodiments of the present invention will be described with reference to the accompanying drawings.

[0045] [First Implementation Method]

[0046] <Fuel Supply Unit>

[0047] <Jig for loading and unloading>

[0048] Figure 1 is a diagram showing the usage state of the loading and unloading jig 1 according to the first embodiment. Figure 2 is a perspective view of the loading and unloading jig 1.

[0049] As shown in Figures 1 and 2, the loading and unloading jig 1 is used to install or remove the on / off valve 106 relative to the engine body 105 constituting the fuel supply and discharge device 100.

[0050] The fuel supply and discharge device 100 is described below.

[0051] The fuel supply and discharge device 100 is a device for supplying fuel to a marine engine (not shown) or discharging 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 discharging exhaust gases.

[0052] In the engine body 105, in addition to the on / off valve 106, a pipe seat (not shown) is also fixed. Multiple internal threads 105b for fixing the pipe seat (not shown) are formed on the pipe seat fixing surface 105a of the engine body 105.

[0053] Furthermore, a valve insertion recess 111 for inserting an on / off valve 106 is formed on the pipe seat fixing surface 105a of the engine body 105. A flow path 110 connected to the injection valve and exhaust valve is formed in the engine body 105. The valve insertion recess 111 communicates with the flow path 110. The valve insertion recess 111 has an opening 111a on the pipe seat fixing surface 105a of the engine body 105 that opens outwards. The on / off valve 106 is inserted into the valve insertion recess 111 via this opening 111a.

[0054] The loading and unloading jig 1 is used when the opening and closing valve 106 is inserted into the valve insertion recess 111.

[0055] The loading and unloading jig 1 is used through two of the multiple internal threaded portions 105b installed on the engine body 105. The loading and unloading jig 1 is used in a temporary insertion state where the opening and closing valve 106 is slightly inserted into the valve insertion recess 111.

[0056] The loading and unloading fixture 1 includes a feed screw part 2 installed on the opening and closing valve 106, a nut part 3 that meshes with the feed screw part 2, two support shaft parts 4 respectively installed on the engine body 105, and a connecting part 5 connecting the feed screw part 2 and each support shaft part 4.

[0057] <Feed Screw Section>

[0058] The feed screw section 2 includes a round bar-shaped external threaded rod 6, a valve retainer 8 rotatably supported on the first end 6a of the external threaded rod 6 via a bearing 7, and a handle 9 provided on the second end 6b of the external threaded rod 6 located on the side opposite to the first end 6a.

[0059] Figure 3 is a perspective view of valve retainer 8.

[0060] As shown in Figures 1 to 3, the valve retainer 8 includes: a square plate-shaped bearing boss 11 on which a bearing 7 is provided; a circular plate-shaped base portion 12 integrally formed with the bearing boss 11; and a retainer body 13 integrally formed with the base portion 12.

[0061] The base portion 12 is integrally formed on the side of the bearing boss 11 opposite to the external threaded rod 6. The retainer body 13 is integrally formed on the side of the base portion 12 opposite to the bearing boss 11. The retainer body 13 has a cylindrical portion 14 protruding from the base portion 12 toward the side opposite to the external threaded rod 6. A pair of claw plates 15 are integrally formed at the end of the cylindrical portion 14 on the side opposite to the base portion 12.

[0062] When viewed axially from the external threaded rod 6, the claw plates 15 are disposed on both sides, separated by the external threaded rod 6. The outer periphery of the claw plates 15 is along the outer periphery of the cylindrical portion 14. A flat portion 15a is formed on the radially inner side of the claw plates 15. The claw plates 15 are arranged in a parallel manner with each flat portion 15a. The flat portion 15a protrudes radially inward relative to the inner periphery of the cylindrical portion 14.

[0063] The head 106a of the on / off valve 106 can be hooked onto the protruding part of the flat portion 15a. This allows the valve retainer 8 to be mounted on the on / off valve 106. Furthermore, with the valve retainer 8 mounted on the on / off valve 106, the on / off valve 106 and the external threaded rod 6 are coaxial.

[0064] <Nut section>

[0065] Figure 4 is an exploded perspective view of the nut part 3.

[0066] As shown in Figures 1, 2, and 4, the nut part 3 includes: a cylindrical nut body 16 that engages with the externally threaded rod 6; a first nut 17 integrally formed at the axial end of the nut body 16; and a second nut 18 that is independently disposed from the nut body 16 and the first nut 17.

[0067] An internal thread portion 16a is formed on the inner circumferential surface of the nut body 16, which engages with the external threaded rod 6. An external thread portion 16b is formed on the outer circumferential surface of the nut body 16.

[0068] The first nut 17 has an internal thread (not shown) that is identical to the internal thread 16a of the nut body 16. Therefore, the external thread rod 6 continuously engages with the first nut 17 and the internal thread 16a of the nut body 16.

[0069] The outer peripheral surface of the first nut 17 is formed, for example, in a hexagonal shape. Insertion holes 17b are formed on six flat surfaces 17a formed on the outer peripheral surface of the first nut 17. A holding rod 19 can be inserted into each insertion hole 17b.

[0070] The second nut 18 engages with the external thread 16b. The outer peripheral surface of the second nut 18 is formed in the same shape as the first nut 17, for example, hexagonal. Insertion holes 18b are formed on six flat surfaces 18a formed on the outer peripheral surface of the second nut 18. A holding rod 19 can be inserted into each insertion hole 18b.

[0071] <Support Shaft Section>

[0072] The support shaft portion 4 includes a shaft body 21 and an externally threaded portion 22 integrally formed on the axial end of the shaft body 21. The outer diameter of the externally 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.

[0073] The support shaft portion 4, thus configured, is installed on the engine body 105 by fastening the external thread portion 22 to the internal thread portion 105b of the engine body 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 body 105. This allows the support shaft portion 4 to be positioned.

[0074] Two locating rings 23 are installed on each shaft body 21. The connecting part 5 is installed on one shaft body 21 in a position where it is positioned between the two locating rings 23.

[0075] <Connecting Section>

[0076] The connecting part 5 has two connecting plates 25 and 26 (first connecting plate 25 and second connecting plate 26).

[0077] The first connecting plate 25 of the two connecting plates 25 and 26 has a first plate body 27 that is elongated in the radial direction of the external threaded rod 6. The thickness direction of the first plate body 27 is aligned with the axial direction of the external threaded rod 6. An elongated hole 27a is formed in the central part of the first plate body 27.

[0078] The elongated hole 27a is formed into an elongated oval shape that is longer along the long side of the first plate body 27. The nut body 16 is inserted into the elongated hole 27a. With the nut body 16 inserted into the elongated hole 27a, the first plate body 27 is positioned between the first nut 17 and the second nut 18.

[0079] When viewed from the thickness direction of the first plate body 27, the first end 27b of the first plate body 27 in the long side direction is formed into an arc shape. The second end 27c on the side opposite to the first end 27b in the long side direction of the first plate body 27 has an integrally formed support shaft mounting portion 30.

[0080] The support shaft mounting part 30 includes a plate-shaped holding part 28 and a locking part 29 provided on the holding part 28. The holding part 28 is integrally formed with the first connecting plate 25.

[0081] The thickness direction of the gripping portion 28 is aligned 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. Therefore, a stepped portion 28c is formed at the end of the gripping portion 28 located on the side of the first plate body 27. The stepped portion 28c is formed in the same arc shape as the first end portion 27b of the first plate body 27.

[0082] A receiving recess 28b is formed in the holding portion 28. The receiving recess 28b is formed to extend through the holding portion 28 in the thickness direction and to open on one side 28a facing the short side of the first connecting plate 25. The shaft body 21 of the support shaft portion 4 is inserted into the receiving recess 28b.

[0083] A locking part 29 is disposed on one side 28a of the gripping part 28. The locking part 29 opens and closes on one side 28a of the gripping part 28 in the receiving recess 28b. More specifically, the locking part 29 is formed in the shape of a rod and is configured to slide freely along one side 28a of the gripping part 28.

[0084] A hook 29a is provided at one end of the locking part 29 along the axial direction. The hook 29a can be attached to and detached from the gripping part 28. Thus, the locking part 29 can release (open) or lock (maintain the closed state of the receiving recess 28b) one side 28a of the gripping part 28 in the receiving recess 28b.

[0085] The basic structure of the second connecting plate 26 is the same as that of the first connecting plate 25. The second connecting plate 26 is symmetrically arranged with the external threaded rod 6 as the center.

[0086] That is, the second connecting plate 26 has a second plate body 31 with an elongated oval shape that is longer in the radial direction of the external threaded rod 6. An elongated hole 31a is formed in the central part of the second plate body 31. The nut body 16 is inserted into the elongated hole 31a. Therefore, with the nut body 16 inserted into the elongated hole 31a, the second plate body 31 is positioned between the first nut 17 and the second nut 18.

[0087] 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 part 28. Therefore, the two sides of the gripping part 28 in the thickness direction and the two sides of the second plate body 31 in the thickness direction are on the same plane.

[0088] A slit 32 is formed in the center of the second plate body 31 in the thickness direction.

[0089] 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 held between the second plate body 31.

[0090] Viewed from the thickness direction of the second plate body 31, the first end 31b of the second plate body 31 in the long side direction is formed into an arc shape. This arc shape is the same as the arc shape of the step portion 28c formed in the holding portion 28 of the first connecting plate 25. The second end 31c on the side opposite to the first end 31b in the long side direction of the second plate body 31 has an integrally formed support shaft mounting portion 30.

[0091] The support shaft mounting portion 30, which is integrally formed with the second plate body 31, and the support shaft mounting portion 30, which is integrally formed with the first plate body 27, have the same structure. Therefore, the description of the support shaft mounting portion 30 integrally formed with the second plate body 31 uses the same reference numerals as that of the support shaft mounting portion 30 integrally formed with the first plate body 27, and the description is omitted.

[0092] Although the illustration is omitted, the side exposed in the slit 32 of the holding portion 28 of the second connecting plate 26 is formed in the same arc shape as the first end portion 27b of the first plate body 27.

[0093] <Installation and Removal Methods for Opening and Closing Valves Using Loading and Unloading Fixtures>

[0094] Next, the method of installing the on / off valve 106 onto the engine block 105 using the loading and unloading jig 1 and the method of removing the on / off valve 106 from the engine block 105 will be described.

[0095] First, the method of installing the on / off valve 106 on the engine block 105 will be explained.

[0096] In this case, the on / off valve 106 is slightly inserted into the valve insertion recess 111 of the engine body 105 shown in FIG. 1, forming a temporary insertion state. Then, the support shaft portion 4 is fastened to the internal thread portion 105b of the engine body 105. Any two of a plurality of internal thread portions 105b can be selected for fastening the support shaft portion 4. However, it is preferable to select the two internal thread portions 105b located on either side of the on / off valve 106. The reason for this will be explained later.

[0097] Next, the valve retainer 8 is installed on the head 106a of the on / off valve 106. At this time, the second nut 18 of the nut part 3 is loosened in advance. With the valve retainer 8 installed on the on / off valve 106, the on / off valve 106 and the external threaded rod 6 are coaxial. In this state, the external threaded rod 6 is parallel to the support shaft part 4.

[0098] Next, release the locking part 29 of each gripping part 28 so that the position of each gripping part 28 is aligned with the position of each support shaft part 4.

[0099] Here, elongated holes 27a and 31a are formed in the main bodies 27 and 31 of each connecting plate 25 and 26, respectively. Therefore, when the second nut 18 is loosened, each connecting plate 25 and 26 can slide freely relative to the nut part 3. Therefore, each connecting plate 25 and 26 can adjust the distance between the feed screw part 2 and the support shaft part 4.

[0100] In addition, with the second nut 18 loosened, each connecting plate 25, 26 can rotate freely relative to the nut portion 3 with the external threaded rod 6 as the center. Therefore, by rotating each connecting plate 25, 26, the distance between two adjacent support shaft portions 4 in the circumferential direction can be adjusted.

[0101] Furthermore, the first plate body 27 is inserted into the slit 32 of the second plate body 31, and the second plate body 31 clamps the first plate body 27. Therefore, deformation or shaking of each connecting plate 25, 26 can be suppressed. Therefore, when the valve retainer 8 is installed on the on / off valve 106, the position of each handle 28 can be easily aligned with the position of each support shaft 4.

[0102] Next, the receiving recesses 28b of each gripping part 28 are pressed into the shaft body 21 of each support shaft part 4. Then, the locking parts 29 of each gripping part 28 are locked. Thus, each support shaft part 4 is connected to each gripping part 28 (connecting plates 25, 26). At this time, two positioning rings 23 mounted on the shaft body 21 of each support shaft part 4 are positioned on both sides across the gripping parts 28. This restricts the axial movement of each connecting plate 25, 26 relative to the support shaft part 4.

[0103] Next, the second nut 18 is tightened. The first nut 17 is integrally formed with the nut body 16. Therefore, by tightening the second nut 18, each plate body 27, 31 is pressed and fixed by the second nut 18 and the first nut 17. As a result, the position of the nut part 3 relative to each support shaft part 4 is fixed.

[0104] When tightening the second nut 18, a holding rod 19 is inserted into each of the insertion holes 17b and 18b of each nut 17 and 18. This allows the second nut 18 to be tightened by gripping each holding rod 19. Thus, for example, the second nut 18 can be tightened without using tools.

[0105] Next, use handle 9 to rotate the external threaded rod 6 and press it into the on / off valve 106. At this time, by holding the handle bar 19 while operating handle 9, the operability of handle 9 can be improved.

[0106] When the external threaded rod 6 is rotated and pressed into the on / off valve 106, the valve retainer 8 mounted on the on / off valve 106 is supported so that it can rotate freely relative to the external threaded rod 6. Therefore, the valve retainer 8 and the on / off valve 106 do not rotate together with the external threaded rod 6. Since the nut portion 3 is fixed, the external threaded rod 6 and the on / off valve 106 do not lose their posture. The axial movement of each connecting plate 25, 26 relative to the support shaft portion 4 is restricted.

[0107] Therefore, the external threaded rod 6 and the on / off valve 106 are pressed axially into the valve insertion recess 111 with high precision. As a result, the on / off valve 106 is fully inserted into the valve insertion recess 111, and the installation of the on / off valve 106 onto the engine body 105 is completed.

[0108] When removing the on / off valve 106 from the engine block 105, simply rotate the external threaded rod 6 in the opposite direction using the handle 9. This pulls the external threaded rod 6 into place relative to the nut portion 3, thus pulling the on / off valve 106 out of the valve insertion recess 111. This completes the removal of the on / off valve 106 from the engine block 105.

[0109] Thus, the loading and unloading fixture 1 in the first embodiment includes a feed screw part 2, a nut part 3, a support shaft part 4, and a connecting part 5.

[0110] Therefore, when the feed screw 2 is rotated, it slides axially relative to the nut 3. As a result, the on / off valve 106 can be pressed axially into the valve insertion recess 111 using the feed screw 2. Furthermore, the on / off valve 106 can be pulled out axially from the valve insertion recess 111. At this time, the feed screw 2 (nut 3) can be supported by the two support shafts 4.

[0111] As a result, the posture of the feed screw section 2 can be stabilized. Therefore, the on / off valve 106 can be easily inserted and removed relative to the valve insertion recess 111.

[0112] Furthermore, the connecting part 5 adjusts the distance between the feed screw part 2 and the support shaft part 4, and also adjusts the distance between adjacent support shaft parts 4 in the circumferential direction. Therefore, the distance between the feed screw part 2 and the support shaft part 4 can be adjusted according to the position of the internal thread part 105b formed on the engine body 105. Moreover, the distance between adjacent support shaft parts 4 in the circumferential direction can be adjusted.

[0113] Therefore, the loading and unloading jig 1 can be used in various fuel supply and discharge devices 100, thus improving the versatility of the loading and unloading jig 1.

[0114] As a more specific structure of the loading and unloading jig 1, the nut part 3 includes a nut body 16, a first nut 17 integrated with the nut body 16, and a second nut 18 that engages with the external threaded portion 16b of the nut body 16.

[0115] With this configuration, the connecting part 5 can be fixed to the nut part 3 with a simple structure, and the external threaded rod 6 can slide relative to the nut part 3.

[0116] As a more specific structure of the loading and unloading jig 1, the connecting part 5 has two plate bodies 27 and 31 formed in an elongated oval shape and a holding part 28 integrally formed with each plate body 27 and 31.

[0117] Each plate body 27, 31 has an elongated hole 27a, 31a with a longer long oval shape along its long side. By inserting a nut body 16 into these elongated holes 27a, 31a, the distance between the feed screw section 2 and the support shaft section 4 can be adjusted. Furthermore, the distance between adjacent support shaft sections 4 in the circumferential direction can also be adjusted. Thus, the adjustment of the distance between the feed screw section 2 and the support shaft section 4, as well as the adjustment of the distance between adjacent support shaft sections 4 in the circumferential direction, can be achieved with a simple structure.

[0118] Furthermore, the feed screw section 2 is supported by two support shaft sections 4 and two connecting plates 25 and 26. Therefore, compared to the case where there is only one support shaft section 4, the posture of the feed screw section 2 can be stabilized. Therefore, it is easier to insert and remove the on / off valve 106 relative to the valve insertion recess 111. By positioning the support shaft sections 4 on both sides with respect to the on / off valve 106, the posture of the feed screw section 2 can be stabilized more reliably.

[0119] When the loading / unloading jig 1 is not in use, the plate bodies 27 and 31 can be slidably moved by bringing the gripping portions 28 closer together, achieving the most compact possible arrangement. The first end 31b of the second plate body 31 and the stepped portion 28c formed on the gripping portion 28 of the first connecting plate 25 are both formed with the same arc shape. Therefore, the first end 31b of the second plate body 31 is accommodated in the stepped portion 28c. Similarly, the first end 27b of the first plate body 27 is also accommodated on the side exposed in the slit 32 of the gripping portion 28 of the second connecting plate 26. Therefore, the posture of the loading / unloading jig 1 when not in use can be stabilized.

[0120] In the first embodiment described above, the loading and unloading jig 1 was described as having two support shaft portions 4. However, it is not limited to this; the loading and unloading jig 1 may have at least one support shaft portion 4. The loading and unloading jig 1 may also have three or more support shaft portions 4. The number of connecting plates 25 and 26 can be varied depending on the number of support shaft portions 4. Each support shaft portion 4 is respectively installed in the internal thread portion 105b of the engine body 105.

[0121] In the first embodiment described above, the cases where the connecting part 5 adjusts the distance between the feed screw part 2 and the support shaft part 4, and the cases where the distance between adjacent support shaft parts 4 in the circumferential direction is adjusted, were explained. The cases where elongated holes 27a and 31a for inserting the nut body 16 are formed in each plate body 27 and 31 to achieve this were explained.

[0122] However, this is not the only limitation; the connecting part 5 can also be configured to adjust only the distance between the feed screw part 2 and the support shaft part 4. In this case, each connecting plate 25, 26 can be configured to slide freely relative to the nut body 16.

[0123] Alternatively, the connecting part 5 can be configured to adjust only the distance between adjacent support shaft parts 4 in the circumferential direction. In this case, the loading and unloading jig 1 has two or more support shaft parts 4. Each connecting plate 25, 26 can be configured to rotate freely relative to the nut body 16.

[0124] In the first embodiment described above, the case where the first nut 17 in the nut portion 3 has an internal thread portion (not shown) that is the same as the internal thread portion 16a of the nut body 16 is explained. The case where the external thread rod 6 is inserted into the first nut 17 by continuously engaging with such a first nut 17 and the internal thread portion 16a of the nut body 16 is explained.

[0125] However, this is not the only limitation. Whether the first nut 17 engages with the external threaded rod 6 is irrelevant, as long as it is configured to allow the external threaded rod 6 to be inserted. The first nut 17 only needs to be provided on the nut body 16. For example, both nuts 17 and 18 can engage with the external threaded portion 16b of the nut body 16. In this configuration, the same effect as the first embodiment described above is achieved.

[0126] In the first embodiment described above, the case where the outer peripheral surfaces of each nut 17, 18 are formed as hexagons, for example, was explained.

[0127] However, this is not a limitation; the outer peripheral surfaces of nuts 17 and 18 can be of any shape. Preferably, the outer peripheral surfaces of nuts 17 and 18 are shaped to allow the use of tools such as wrenches.

[0128] In the first embodiment described above, as a method for installing the on / off valve 106 onto the engine body 105 using the loading and unloading jig 1, the case where each support shaft portion 4 is connected to each handle portion 28 (connecting plate 25, 26) after the valve retainer 8 is installed on the head 106a of the on / off valve 106 is described.

[0129] However, this is not a limitation. After connecting each support shaft part 4 to each handle part 28 (connecting plates 25, 26), the valve retainer 8 can be installed on the head 106a of the on / off valve 106. The order of installation is not limited as long as the positions of the feed screw part 2 and the support shaft part 4 can be adjusted.

[0130] In the first embodiment described above, the case in which two positioning rings 23 are provided on the shaft body 21 of each support shaft portion 4 to restrict the axial movement of each connecting plate 25, 26 relative to the support shaft portion 4 is explained.

[0131] However, it is not limited to this; any method that can restrict the axial movement of each connecting plate 25, 26 relative to the support shaft portion 4 is acceptable. For example, an external thread portion can be formed on the support shaft portion 4 instead of the locating ring 23, allowing the two nuts to engage.

[0132] [Second Implementation]

[0133] <Jig for loading and unloading>

[0134] Next, the loading and unloading jig 201 of the second embodiment will be described based on Figures 4 and 5.

[0135] Figure 5 is a diagram showing the loading and unloading jig 201 in use. Figure 6 is a perspective view of the loading and unloading jig 201. In the following description, the same reference numerals are used as in the first embodiment, and the descriptions are omitted.

[0136] As shown in Figures 5 and 6, the loading and unloading jig 201 of the second embodiment is installed on two of the multiple internal thread portions 105b of the engine body 105, and the aspect used is the same as that of the first embodiment.

[0137] The loading and unloading jig 201 is the same as in the first embodiment in that it is used to fully insert the opening and closing valve 106 into the valve insertion recess 111 while the valve 106 is temporarily inserted into the valve insertion recess 111.

[0138] The loading and unloading fixture 201 is the same as in the first embodiment in that it includes a feed screw portion 2 installed on the on / off valve 106, a nut portion 203 that meshes with the feed screw portion 2, two support shaft portions 4 respectively installed on the engine body 105, and a connecting portion 205 connecting the feed screw portion 2 and each support shaft portion 4.

[0139] The difference between the first embodiment and the second embodiment is that, relative to the nut portion 3 and the connecting portion 5 in the first embodiment, the nut portion 203 and the connecting portion 205 in the second embodiment have different structures.

[0140] In the following description, for ease of explanation, with the loading / unloading jig 201 installed on the engine body 105, the side opposite to the engine body 105 is defined as the lower side, and the side opposite to the engine body 105 is defined as the upper side. Therefore, in the feed screw section 2, the valve retainer 8 is provided at the lower end of the external threaded rod 6. The handle 9 is provided at the upper end of the external threaded rod 6.

[0141] <Nut section>

[0142] The nut part 203 has a cylindrical nut body 216 that engages with the external threaded rod 6 and a flange part 41 integrally formed on the lower part of the nut body 216 in the axial direction. A connecting part 205 is connected to the flange part 41.

[0143] <Connecting Section>

[0144] The connecting part 205 includes a support plate 51 provided on the nut part 203, two upper shafts 52 provided on the support plate 51, and two rails 53 respectively connected to each upper shaft 52.

[0145] The support plate 51 is plate-shaped, and a shaft insertion hole 51a for inserting the nut body 216 is formed in the center along its long side. 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. Thus, the connecting portion 205 is connected to the flange portion 41.

[0146] Shaft insertion holes 51a are formed on both sides of the long side of the support plate 51. An upper shaft 52 is inserted into each shaft insertion hole 51a. The upper shaft 52 is, for example, a bolt.

[0147] The upper shaft 52 has its head 52a facing downwards, and its external threaded portion 52b is inserted into the shaft insertion hole 51a from below. In this state, retaining nuts 55 are engaged on both sides of the external threaded portion 52b, across the support plate 51. By tightening these retaining nuts 55, the upper shaft 52 is fixed to the support plate 51.

[0148] The track 53 is formed as a rectangular plate that is longer in the radial direction of the upper shaft 52. An upper shaft insertion hole 53a and a support shaft insertion hole 53b are formed on the track 53. The upper shaft insertion hole 53a is formed in an elongated oval shape along the long side of the track 53, from the center of the track 53 to near one end of the long side. The support shaft insertion hole 53b is formed near the other end of the long side of the track 53.

[0149] An upper shaft 52 is inserted into the upper shaft insertion hole 53a. That is, a rail 53 is provided on the head 52a of the upper shaft 52. An adjusting nut 56 engages between the rail 53 and the fixing nut 55 on the external threaded portion 52b of the upper shaft 52.

[0150] The support shaft insertion hole 53b is circular in shape for the shaft body 21 of the support shaft portion 4 to be inserted. Therefore, the support shaft portion 4 is parallel to the external threaded rod 6. The shaft body 21 is prevented from disengaging from the track 53 by positioning rings 23 installed on both sides of the shaft body 21 across the track 53. Thus, the support shaft portion 4 is connected to the track 53.

[0151] <Installation and Removal Methods for Opening and Closing Valves Using Loading and Unloading Fixtures>

[0152] Next, the method of installing the on / off valve 106 onto the engine block 105 using the loading / unloading jig 201 and the method of removing the on / off valve 106 from the engine block 105 will be described.

[0153] First, the method of installing the on / off valve 106 on the engine block 105 will be explained.

[0154] In this case, the on / off valve 106 is slightly inserted into the valve insertion recess 111 of the engine block 105, forming a temporary insertion state. Then, the valve retainer 8 is installed on the head 106a of the on / off valve 106. At this time, the adjusting nut 56 is pre-loosened. With the valve retainer 8 installed on the on / off valve 106, the on / off valve 106 and the external threaded rod 6 are coaxial.

[0155] Next, the position of the support shaft 4 is aligned with the position of the internal thread 105b of the engine body 105. Here, an upper shaft insertion hole 53a for inserting the upper shaft 52 is formed in the track 53 of the connecting part 205. It is formed into an elongated oval shape along the long side of the track 53. Therefore, with the adjusting nut 56 loosened, each track 53 can slide freely relative to the upper shaft 52. Therefore, each track 53 can adjust the distance between the feed screw 2 and the support shaft 4.

[0156] In addition, with the adjusting nut 56 loosened, each track 53 can rotate freely around the upper shaft 52. Therefore, by rotating each track 53, the distance between two adjacent support shafts 4 in the circumferential direction can be adjusted.

[0157] The internal thread portion 105b of the fastening support shaft portion 4 can be any two of a plurality of internal thread portions 105b. However, it is preferable to select the two internal thread portions 105b located on both sides of the on / off valve 106.

[0158] After aligning the support shaft portion 4 with the internal thread portion 105b, the support shaft portion 4 is tightened to the internal thread portion 105b. Then, the track 53 is fixed by tightening the adjusting nut 56. As a result, the position of the nut portion 3 relative to each support shaft portion 4 is fixed.

[0159] Next, the external threaded rod 6 is rotated using the handle 9, pressing it into the on / off valve 106. As a result, the external threaded rod 6 and the on / off valve 106 are pressed axially into the valve insertion recess 111 with high precision. Therefore, the on / off valve 106 is fully inserted into the valve insertion recess 111, and the installation of the on / off valve 106 into the engine block 105 is complete.

[0160] When removing the on / off valve 106 from the engine block 105, simply rotate the external threaded rod 6 in the reverse direction using the handle 9. This pulls the external threaded rod 6 into place relative to the nut portion 3, and the on / off valve 106 is pulled out from the valve insertion recess 111. Therefore, the removal of the on / off valve 106 from the engine block 105 is complete.

[0161] Therefore, according to the second embodiment, the same effect as the first embodiment is achieved. Furthermore, as the loading / unloading jig 201, the feed screw 2, nut 203, support shaft 4, and connecting part 205 can be integrated. Accordingly, the operation and management of the loading / unloading jig 201 are simplified.

[0162] An upper shaft insertion hole 53a and a support shaft insertion hole 53b are formed on the track 53. The upper shaft insertion hole 53a is formed into an elongated oval shape, while the support shaft insertion hole 53b is simply formed into a circular shape for the shaft body 21 of the support shaft portion 4 to be inserted. Therefore, compared to the case where both the upper shaft 52 and the support shaft portion 4 are configured to slide freely relative to the track 53, the distance between the feed screw portion 2 and the support shaft portion 4 can be easily adjusted.

[0163] In the second embodiment described above, the loading and unloading jig 201 is described as having two support shaft portions 4.

[0164] However, it is not limited to this; the loading and unloading jig 201 only needs to have at least one support shaft portion 4. The loading and unloading jig 201 may also have three or more support shaft portions 4. The number of upper shafts 52 and rails 53 can be changed according to the number of support shaft portions 4. Each support shaft portion 4 is respectively installed on the internal thread portion 105b of the engine body 105.

[0165] In the second embodiment described above, the cases where the connecting part 205 adjusts the distance between the feed screw part 2 and the support shaft part 4, and the cases where the distance between adjacent support shaft parts 4 in the circumferential direction is adjusted, are explained. The case where an elongated oval upper shaft insertion hole 53a is formed in each track 53 to achieve this is also explained.

[0166] However, it is not limited to this; the connecting part 205 can also be configured to adjust only the distance between the feed screw part 2 and the support shaft part 4. In this case, each track 53 can be set to slide freely relative to the upper shaft 52.

[0167] Alternatively, the connecting portion 205 can be configured to adjust only the distance between adjacent support shaft portions 4 in the circumferential direction. In this case, the loading / unloading jig 201 has two or more support shaft portions 4. Each track 53 can be configured to rotate freely relative to the upper shaft 52. Furthermore, the upper shaft insertion hole 53a of each track 53 can be a simple circular hole, and the support shaft insertion hole 53b along the track 53 can be an elongated oval shape. Alternatively, the support shaft insertion hole 53b can be an arc-shaped hole along the circumferential direction. When the support shaft insertion hole 53b is an arc-shaped hole along the circumferential direction, at least the end of each track 53 on the side where the support shaft insertion hole 53b is formed can extend circumferentially.

[0168] In the second embodiment described above, the case in which an upper shaft insertion hole 53a and a support shaft insertion hole 53b are formed on the track 53 is explained.

[0169] However, it is not limited to this, and it can also be configured such that the upper shaft insertion hole 53a is connected to the support shaft insertion hole 53b.

[0170] In the second embodiment described above, as a method for installing the on / off valve 106 onto the engine body 105 using the loading / unloading jig 201, the method is described in which the position of each support shaft portion 4 is aligned with the position of the internal thread portion 105b of the engine body 105 after the valve retainer 8 is installed onto the head 106a of the on / off valve 106.

[0171] However, this is not the only option. Alternatively, after aligning the positions of each support shaft portion 4 with the position of the internal thread portion 105b of the engine body 105, the valve retainer 8 can be installed on the head 106a of the on / off valve 106. The order of installation is not limited as long as the positions of the feed screw portion 2 and the support shaft portion 4 can be adjusted.

[0172] In the second embodiment described above, it was explained that two positioning rings 23 were provided on the shaft body 21 of each support shaft portion 4 to restrict the axial movement of each track 53 relative to the support shaft portion 4.

[0173] However, this is not the only option; any method that can restrict the axial movement of each track 53 relative to the support shaft 4 is acceptable. For example, an external thread could be formed on the support shaft 4 instead of the locating ring 23, allowing the two nuts to engage.

[0174] This invention is not limited to the embodiments described above, but includes various modifications made to the embodiments described above without departing from the spirit of this invention.

[0175] For example, in the first and second embodiments described above, the use of loading and unloading jigs 1 and 201 for installing the on / off valve 106 on the engine body 105 of the fuel supply and discharge device 100 used in a marine engine is described.

[0176] However, it is not limited to this. When the mounted body (the valve 106 in this embodiment) is inserted into and removed from the mounting hole (the valve insertion recess 111 in this embodiment) of various mounting bodies instead of the engine body 105, the loading and unloading jigs 1 and 201 can be used.

[0177] In the embodiments disclosed in this specification, a component composed of multiple objects can be integrated into one object; conversely, a component composed of a single object can be divided into multiple objects. Whether integrated or not, it is acceptable as long as the configuration achieves the purpose of the invention.

Claims

1. A jig for loading and unloading, used for inserting and removing a mounted object relative to a mounting hole formed in a mounting body, wherein, The loading and unloading fixture comprises: a feed screw portion mounted on the mounted body and extending axially along the mounting hole; a nut portion engaging with the feed screw portion; a support shaft portion mounted on the mounted body; and a connecting portion connecting the nut portion and the support shaft portion, the connecting portion being configured to freely adjust the axial distance between the feed screw portion and the support shaft portion.

2. The loading and unloading jig according to claim 1, wherein, The support shaft section is provided with multiple parts.

3. A jig for loading and unloading, used for inserting and removing a mounted object relative to a mounting hole formed in a mounting body, wherein, The loading and unloading fixture includes: a feed screw portion, which is mounted on the body to be mounted and extends axially along the mounting hole; a nut portion, which engages with the feed screw portion; and a plurality of support shaft portions, which are mounted on the body to be mounted. And a connecting portion that connects the nut portion and each of the support shaft portions respectively, the connecting portion being configured to freely adjust the distance between adjacent support shaft portions in the circumferential direction.

4. A jig for loading and unloading, used for inserting and removing a mounted object relative to a mounting hole formed in a mounting body, wherein, The loading and unloading fixture includes: a feed screw portion, which is mounted on the body to be mounted and extends axially along the mounting hole; a nut portion, which engages with the feed screw portion; and a plurality of support shaft portions, which are mounted on the body to be mounted. And a connecting part, which connects the nut part and each of the support shaft parts respectively, the connecting part being configured to freely adjust the interaxial distance between the feed screw part and the support shaft part and the distance between adjacent support shaft parts in the circumferential direction.

5. The loading and unloading jig according to any one of claims 2 to 4, wherein, The nut portion includes: a cylindrical nut body that meshes with the feed screw portion and has an external thread on its outer circumferential surface; a first nut disposed on the nut body, into which the feed screw portion is inserted; and a second nut that meshes with the external thread. The connecting portion includes two connecting plates that are elongated in one direction and disposed between the first nut and the second nut. Each connecting plate includes: a plate body that is slidably disposed on the nut body in a radial direction; and a support shaft mounting portion disposed on the plate body at a position further outward in the radial direction than the nut body, for mounting the support shaft portion.

6. The loading and unloading jig according to any one of claims 2 to 4, wherein, The nut portion includes: a cylindrical nut body that meshes with the feed screw portion and has an external thread on its outer circumferential surface; a first nut disposed on the nut body, into which the feed screw portion is inserted; and a second nut that meshes with the external thread. The connecting portion includes two connecting plates that are elongated in one direction and disposed between the first nut and the second nut. Each connecting plate includes: a plate body that is rotatably disposed on the nut body; and a support shaft mounting portion disposed on the plate body at a position radially outward of the nut body for mounting the support shaft portion.

7. The loading and unloading jig according to any one of claims 2 to 4, wherein, The nut portion includes: a cylindrical nut body that meshes with the feed screw portion and has an external thread on its outer circumferential surface; a first nut disposed on the nut body, into which the feed screw portion is inserted; and a second nut that meshes with the external thread. The connecting portion includes two connecting plates that are elongated in one direction and disposed between the first nut and the second nut. Each connecting plate includes: a plate body having an elongated hole formed in the connecting plate in an elongated oval shape in the one direction for the nut body to be inserted; and a support shaft mounting portion formed at a position radially outward of the feed screw portion than the elongated hole of the plate body for mounting the support shaft portion.

8. The loading and unloading jig according to any one of claims 2 to 4, wherein, The connecting portion includes: a support plate disposed on the nut portion; Two upper shafts are disposed on both sides of the support plate, separated by the nut portion; and two rails are respectively disposed radially and freely slidably on each of the upper shafts, with the support shaft portion rotatably disposed on the side of each rail opposite to the upper shaft.

9. The loading and unloading jig according to any one of claims 2 to 4, wherein, The connecting portion includes: a support plate disposed on the nut portion; Two upper shafts are disposed on both sides of the support plate, separated by the nut portion; and two rails are rotatably disposed on each of the upper shafts, with the support shaft portion rotatably disposed on the side of each rail opposite to the upper shaft.

10. The loading and unloading jig according to any one of claims 2 to 4, wherein, The connecting portion includes: a support plate disposed on the nut portion; Two upper shafts are disposed on both sides of the support plate, separated from the nut portion, and extend axially along the feed screw portion; and two rails have insertion holes for inserting each of the upper shafts and extend radially along the upper shafts, the insertion holes being formed into an elongated oval shape along the rails, and the support shaft portion is rotatably disposed on the side of each rail opposite to the upper shaft.

11. The loading and unloading jig according to any one of claims 2 to 4, wherein, The mounting body includes an engine body for a marine engine, and the mounted body includes an on / off valve connected to a flow path formed in the engine body and driving a hydraulic actuator for the marine engine.

Images