Pressing device and pressing system

Abstract

To provide a pressing device and a pressing system which can prevent an occurrence of a failure in a simple structure.SOLUTION: A pressing device 1 comprises: a pressing component 3 which presses a piston 110 into a cylinder 102 to be entered; a cylindrical member 4 which movably supports the pressing component 3 along a shaft direction H of the cylinder 102 as a support component; and a lever 5 which moves the cylindrical member 4 to apply pressing load from the pressing component 3 to the piston 110 as an action member. The pressing device 1 also includes: an operation member 6 which inputs the pressing load; a connection member 7 which connects the lever 5 with the operation member 6; and a release mechanism 8 which moves, when reaction force applying from the pressing component 3 to the cylindrical member 4 is a prescribed value or more, the connection member 7 to release the connection between the lever 5 and the operation member 6.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a pressing device and a pressing system.

Background Art

[0002] Conventionally, as a pressing device, when assembling an engine, a device that presses and inserts a piston into a cylinder of a cylinder block is known (see, for example, Patent Document 1). In this device, the pressing means is provided with a pressing head moving means for moving the pressing head and a pressing rod attached to the pressing head for transmitting the pressing force to the piston head. Further, a pressing force measuring means for measuring the pressing force applied to the piston head and arranged in series with the pressing rod is provided. And this device prevents the outflow of defective products to the next process by monitoring the pressing force applied to the piston head.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, it is not easy to accurately set and insert the piston along the axial direction of the cylinder from above the cylinder block. If accurate setting and pushing cannot be performed, problems such as the oil ring riding on the peripheral edge of the cylinder opening and the piston tilting and being unable to be inserted or being jammed occur.

[0005] For this reason, the conventional pressing device monitors the pressing force by the pressing force measuring means and stops the insertion, but the configuration of the pressing device becomes complicated, and further improvement is desired. The object of the present invention is to provide a pressing device and a pressing system that can prevent the occurrence of defects with a simple configuration.

Means for Solving the Problems

[0006] To solve the above problems, the pressing device of the present invention includes a pressing member that presses and inserts an inserted member into a cylinder body, and a support member that movably supports the pressing member along the axial direction of the cylinder body. Further, the pressing device includes an acting member that moves the support member to apply a pressing load from the pressing member to the inserted member, an operating member that inputs the pressing load, and a connecting member that connects between the acting member and the operating member. Furthermore, when the reaction force applied from the pressing member to the support member exceeds a predetermined value, the pressing device is characterized by including a release mechanism that moves the connecting member to release the connection between the acting member and the operating member.

Effects of the Invention

[0007] According to the present invention, a pressing device and a pressing system that can prevent the occurrence of defects with a simple configuration are provided.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying out the Invention

[0009] Hereinafter, in the embodiments of the present invention, the description will be made with appropriate reference to the drawings. The same reference numerals are given to the same components and redundant descriptions are omitted. For convenience of explanation, when explaining the direction, the direction in which a plurality of cylinders 102 of the engine 100 are arranged in FIG. 1 will be described as the "cylinder arrangement direction L". In the embodiment, the direction along the axis of the cylinder 102 will be described as the "axial direction (or vertical direction) H".

[0010] FIG. 1 shows the configuration of a pressing system 20 including a plurality of pressing devices 1 according to an embodiment to which the present invention is applied. The pressing device 1 is used to press and insert a piston 110 as an inserted member into a cylinder 102 as a cylindrical body formed in a cylinder block 101 when assembling the engine 100. The engine 100 of the embodiment is an in-line four-cylinder, and four cylindrical cylinders 102 are arranged at equal intervals in the cylinder arrangement direction L in the cylinder block 101. Therefore, the pressing system 20 of the embodiment has a pressing device 1 corresponding to each cylinder 102 and is configured to be able to perform the assembly work of a total of four pressing devices 1 simultaneously.

[0011] The pressing device 1 includes a device body 2 having a carriage portion configured to be placed or movable on the floor, and a pressing member 3 that presses and inserts the piston 110 into each cylinder 102 of the cylinder block 101. And the pressing device 1 includes a cylindrical member 4 as a support member that supports the pressing member 3 movably along the axial direction H of the cylinder 102.

[0012] Among these, the main body 2 of the apparatus is configured by combining a plurality of frame members in the carriage part. A plurality of rotatable wheels are provided at the lower part of the carriage part, and a support column 2b extends in the vertical direction. The support column 2b fixes a holding part 16 at the middle part in the axial direction H. The holding part 16 projects upward from the base fixed to the support column 2b toward above the cylinder block 101. The holding part 16 is provided with a ball-shaped slide guide (not shown) inside, and holds the cylindrical member 4 as a support member so as to be slidable along the axial direction H.

[0013] As shown in FIG. 2, one end 9a of a round bar-shaped shaft 9 as a relative movement part is fixed to the upper surface side of the pressing member 3, which is located on the opposite side of the surface pressing the piston 110. The shaft 9 is slidably inserted into a shaft hole formed in the cylindrical member 4 along the axial direction H. Further, a coil spring as a biasing member 13 described later is installed between the pressing member 3 and the cylindrical member 4. Thereby, the pressing member 3 can move in the approaching and separating direction along the axial direction H directly above the cylinder 102 formed in the cylinder block 101. Also, one end 9a of the shaft 9 is relatively movably inserted into the cylindrical member 4 supported by the holding part 16 so as to be slidable. The length of the shaft 9 in the embodiment is set to be such that the upper end of the other end 9b is located at the same height position as a pulley 14 described later in the state where the biasing member 13 shown in FIG. 2 is most extended. Further, the length of the shaft 9 in the embodiment is set to be such that even when the upper end of the other end 9b relatively moves upward so as to separate from the pulley inside the cylindrical member 4 in the state where the biasing member 13 is most compressed, it does not contact the inner surface of the upper wall of the cylindrical member 4.

[0014] Furthermore, a roller member 18 is rotatably provided at the upper end 4a of the cylindrical member 4 with the rotation axis directed in the cylinder array direction L (see FIG. 1). The roller member 18 is in contact with the middle part 5b of the lever 5. The roller member 18 rotates when the lever 5 is pushed down and adjusts the contact position with the lever 5. Thereby, the pressing load by the lever 5 can be smoothly transmitted to the cylindrical member 4.

[0015] Furthermore, a box-shaped case 15 is fixed to the upper outer surface of the cylindrical member 4. The case 15 protrudes from the upper part of the cylindrical member 4 toward the support column 2b of the apparatus main body 2. Inside the case 15, a pulley 14 is housed as an engaging member. The pulley 14 is pivotally supported between the inner side surfaces of the case 15 so that the rotation axis can be rotated in the cylinder arrangement direction L (see FIG. 1). As a result, the pulley 14 is configured to move up and down along the axial direction H together with the case 15 fixed to the upper part of the cylindrical member 4. Inside the case 15, a notch (or long hole) 4c for inserting a load transmission member 10 described later is formed along the axial direction H on the side surface of the cylindrical member 4.

[0016] The pressing device 1 includes a lever 5 as an acting member. The other end side 5c of the lever 5 is pivotally supported at the upper end of the apparatus main body 2 using a hinge structure 2a so as to be rotatable in the vertical direction. When the lever 5 is pushed downward with the hinge structure 2a at one end side 5a as the rotation center, the intermediate part 5b comes into contact with the roller member 18. As a result, the operating load from the lever 5 is transmitted to the upper part of the cylindrical member 4 from above, and the cylindrical member 4 can be slid downward directly along the axial direction H.

[0017] A return spring 17 is provided on the outer periphery of the cylindrical member 4. The return spring 17 is interposed between the upper surface of the holding portion 16 and the lower surface of the case 15. When an operating load is applied, the cylindrical member 4 and the lever 5 are pushed downward against the biasing force of the return spring 17. When no operating load is applied, the cylindrical member 4 and the lever 5 are pushed upward by the biasing force of the return spring 17. Therefore, when the lever 5 shown in FIG. 2 is not pushed down or the intermediate part 5b is not in contact with the roller member 18, a predetermined interval is formed between the upper surface of the cylinder block 101 and the pressing member 3.

[0018] Furthermore, the pressing device 1 includes a connecting member 7 that connects the lever 5 and the operating member 6. The pressing device 1 also includes a release mechanism 8 that moves the connecting member 7 to release the connection between the lever 5 and the operating member 6 when the reaction force applied from the pressing member 3 to the cylindrical member 4 reaches a predetermined value or more. Among these, the connecting member 7 has a columnar connecting pin 7a as shown in FIG. 2. The connecting pin 7a is disposed so as to be able to protrude and retract from within a recess 5d formed on the other end side 5c of the lever 5. The connecting pin 7a is biased in the protruding direction by a spring 7c provided within the recess 5d, and is detachably engaged with an engagement hole 6a (described later) formed in the operating member 6 in the protruding state. Thereby, when the connecting member 7 is inserted into and engaged with the engagement hole 6a, the other end side 5c of the lever 5 can be connected to the operating member 6.

[0019] The operating member 6 is a round bar-shaped handle bar that is gripped by the operator of the pressing device 1, and is provided along the cylinder arrangement direction L. Four engagement holes 6a are respectively recessed in the operating member 6 at predetermined intervals. The lever 5 is connected to the engagement hole 6a via the connecting member 7. Both end portions of the operating member 6 are supported by a pair of support arms 6b. The base end portions of the respective support arms 6b are rotatably connected to the upper end portion of the device body 2 via a hinge structure 2a. For this reason, the handle bar of the operating member 6 and the pair of left and right support arms 6b, 6b are integrally formed in a U shape, and when the operator operates the operating member 6, the same pressing load can be simultaneously transmitted to the pistons 110 of the respective cylinders.

[0020] Furthermore, the release mechanism 8 includes a load transmission member 10 constituted by a flexible wire cable, and a biasing member 13 having a spring member with a predetermined spring force set in advance. One end side 11 of the load transmission member 10 is connected to the side end surface on the spring 7c side of the connecting member 7. The other end side 12 of the load transmission member 10 is connected to the other end side 9b of the upper portion of the shaft 9. The intermediate portion 10a of the load transmission member 10 is movably wound around and engaged with a pulley 14.

[0021] Further, the biasing member 13 is provided on the outer periphery of the shaft 9 and is interposed between the lower end of the cylindrical member 4 and the upper surface of the pressing member 3. The biasing member 13 is set with a spring force such that it contracts by a predetermined amount when the reaction force from the pressing member 3 reaches a predetermined value or more. That is, when the piston 110 is inserted into the cylinder 102, the biasing member 13 receives the frictional resistance as a reaction force and is compressed between the cylindrical member 4 and the pressing member 3. Therefore, the spring constant of the biasing member 13 is set such that when a predetermined reaction force is applied beyond the range where normal insertion is possible, the compression amount is such that the connecting pin 7a can be pulled out from the engaging hole 6a.

[0022] Specifically, due to the compression of the biasing member 13, the cylindrical member 4 and the shaft 9 move relative to each other in the axial direction H against the biasing member 13. That is, when the cylindrical member 4 moves downward and the pulley 14 moves downward, the other end side 9b of the shaft 9 relatively moves upward away from the pulley 14. For this reason, the load transmission member 10 is pulled into the recess 5d of the lever 5 by the pulley 14, which converts the moving direction to the opposite up and down direction and is connected to the connecting member 7 at one end side 11.

[0023] In this way, in the pressing device 1 of the embodiment, the biasing member 13 is compressed to a desired compression amount by a reaction force equal to or greater than a preset predetermined value. Therefore, when a problem occurs such that the piston 110 catches on the cylinder 102 and the reaction force increases, the load transmission member 10 immerses the connecting pin 7a into the recess 5d and pulls it out from the engaging hole 6a. Thereby, the connection between the operating member 6 and the lever 5 by the connecting member 7 is released.

[0024] Further, the pressing system 20 of the embodiment includes an operating member 6 for simultaneously inputting a pressing load to a plurality of pressing devices 1. As shown in FIG. 1, the operating member 6 is connected to each lever 5 of the four pressing devices 1 provided for each of the four cylinders of the engine 100 via the respective connecting members 7. As a result, the pressing system 20 of the embodiment can simultaneously operate a plurality of pressing devices 1 by depressing a single handlebar. Then, a plurality of pistons 110 can be pressed and assembled into the respective cylinders 102 of the cylinder block 101 at once.

[0025] Next, an assembly operation will be described in which a piston 110 is inserted into a plurality of cylinders 102 formed in a cylinder block 101 of an engine 100 by a pressing system 20 including a plurality of pressing devices 1.

[0026] As shown in FIG. 2, a piston rod 111 and an oil ring (not shown) are pre-attached to the piston 110. Then, the piston 110 is set on the upper part of the cylinder 102 from above the cylinder block 101. Next, as shown in FIG. 3, in the pressing device 1, the pressing member 3 is aligned directly above the piston 110 set in the cylinder 102. When the handlebar of the operating member 6 is depressed, the intermediate portion 5b comes into contact with a roller member 18 provided on the cylindrical member 4. The operating force for depressing the operating member 6 is transmitted to the lever 5 via a connecting pin 7a of the connecting member 7. The lever 5 rotates about one end side 5a fixed by a hinge structure 2a as a rotation center. The intermediate portion 5b of the lever 5 is in contact with a roller member 18 provided at an end portion 4a of the cylindrical member 4 on the lower surface side. For this reason, the cylindrical member 4 slides downward along the axial direction H within the holding portion 16 as the roller member 18 is depressed. Then, the lower end 4b of the cylindrical member 4 presses the pressing member 3 downward via the biasing member 13.

[0027] As shown in FIG. 4, in the pressing device 1 of the embodiment, the upper surface of the piston 110 is depressed by the pressing member 3 to insert the piston 110 into the cylinder 102. At this time, the return spring 17 is compressed as the operating member 6 is depressed. When the reaction force generated by the friction between the outer wall surface of the piston 110 and the inner wall surface of the cylinder 102 is less than a preset predetermined value, the piston 110 is smoothly inserted into the cylinder 102 while the biasing member 13 is compressed to some extent.

[0028] However, as shown in FIG. 5, when the piston 110 set in the cylinder block 101 is inclined in the insertion direction, for example, the oil ring may ride up and bite into the peripheral edge of the opening of the cylinder 102. In this state, the resistance due to friction and snagging increases, the reaction force exceeds a preset predetermined value, and there is a risk of problems when it is further pushed in.

[0029] As shown in FIG. 6, in the pressing device 1 of the embodiment, the generated reaction force compresses the biasing member 13 interposed between the pressing member 3 and the cylindrical member 4. As a result, the cylindrical member 4 moves downward along the axial direction H1 against the biasing member 13. In the embodiment, the spring constant of the biasing member 13 is set so that the biasing member 13 is compressed by a reaction force of a certain dimension or more and the connecting pin 7a is removed from the engaging hole 6a before a problem occurs in the piston 110 and the cylinder 102.

[0030] Then, when the cylindrical member 4 moves downward along the axial direction H1 against the biasing member 13, the height position of the pulley 14 provided on the upper part of the cylindrical member 4 also moves downward. On the other hand, while the biasing member 13 contracts due to the reaction force, the pressing member 3 and the shaft 9 do not move. Therefore, the height position of the pulley 14 moves downward away from the other end side 9b of the stationary shaft 9, and the pulley 14 pulls down the intermediate portion 10a of the load transmission member 10.

[0031] At this time, the flexible wire cable of the load transmission member 10 is pulled by the pulley 14 while being bent. On the other hand, one end side 11 of the wire cable is connected to the connecting pin 7a in the recess 5d formed on the other end side 5c of the lever 5. For this reason, as shown in FIG. 6, the connecting pin 7a is pulled into the recess 5d against the biasing force of the spring 7c.

[0032] When the reaction force acting on the cylindrical member 4 from the pressing member 3 becomes equal to or greater than a predetermined value and the amount of contraction of the biasing member 13 becomes equal to or greater than a predetermined amount, the connecting pin 7a disengages from the engaging hole 6a of the operating member 6. For this reason, the connection between the operating member 6 and the lever 5 is released and they are in a disengaged state. That is, as shown in FIG. 7, in the pressing device 1 of the embodiment, when the reaction force applied to the cylindrical member 4 from the pressing member 3 becomes equal to or greater than a predetermined value, the connecting pin 7a disengages from the engaging hole 6a, and the lever 5 on the piston 110 side separates from the operating member 6. When the reaction force is less than the predetermined value, since the piston 110 is normally inserted, the connecting pin 7a maintains its engagement with the engaging hole 6a and the lever 5 does not separate from the operating member 6. For this reason, when the handlebar is pulled down, the normally assembled piston 110 remains inside the cylinder 102 (see FIG. 4).

[0033] Furthermore, the lever 5 separated from the operating member 6 rotates upward due to the restoration of the biasing member 13. Also, the connecting pin 7a that has disengaged from the engaging hole 6a projects again from the other end side 5c of the lever 5 due to the biasing force of the spring 7c. Then, by reinserting only the pistons 110 that could not be assembled into the cylinder block 101 and are not inserted into the cylinder 102, the assembly work for all the pistons 110 can be performed efficiently.

[0034] Furthermore, in a pressing system 20 including a plurality of pressing devices 1 according to the embodiment shown in FIG. 1, the operating member 6 is connected to a plurality of levers 5 via a plurality of connecting members 7 respectively. For this reason, in the pressing system 20 of the embodiment, a plurality of pistons 110 can be assembled by an operation of pushing down the handlebar of the operating member 6 once. At this time, when the friction becomes large in some of the pistons 110, only the pressing device 1 pressing that piston 110 is disconnected from the operating member 6. Therefore, the other normal pistons 110 can be inserted as they are, and the working efficiency is good. In addition, for the piston 110 that could not be assembled, the connecting pin 7a can be disengaged from the engagement hole 6a to release the connection and cut off the transmission of the pressing load. Therefore, a pressing load exceeding a certain level does not act between the cylinder 102 and the piston 110, preventing the occurrence of problems. Furthermore, the uninserted inserted member has no problems. Thus, it can be assembled immediately by reinsertion, further improving the working efficiency.

[0035] As described above, the pressing device 1 of the embodiment includes a pressing member 3 that presses and inserts the piston 110 into the cylinder 102, and a support member. The support member supports the pressing member 3 so as to be movable along the axial direction H of the cylinder 102. The pressing device 1 also includes an operating member 6 that inputs a pressing load, and an operating member 6 that inputs a pressing load. Further, the pressing device 1 includes a connecting member 7 that connects the lever 5 and the operating member 6, and a release mechanism 8. When the reaction force applied from the pressing member 3 to the cylindrical member 4 reaches a predetermined value or more, the release mechanism 8 moves the connecting member 7 to release the connection between the lever 5 and the operating member 6.

[0036] According to this pressing device 1, the lever 5 as the operating member and the operating member 6 that inputs the pressing load are connected via the connecting member 7. When the reaction force applied from the pressing member 3 to the support member reaches a predetermined value or more, the release mechanism 8 moves the connecting member 7 to release the connection between the lever 5 and the operating member 6. Therefore, a pressing load exceeding a certain level does not act between the cylinder 102 and the piston 110, preventing the occurrence of problems.

[0037] Further, the pressing member 3 has a relative moving portion that can move relative to the cylindrical member 4, and the connecting member 7 is disposed so as to be able to protrude and retract with respect to one of the operating member 6 and the acting member. The release mechanism 8 has a load transmission member 10 whose one end side 11 is connected to the connecting member 7 and the other end side 12 is connected to the relative moving portion, and a biasing member 13 interposed between the cylindrical member 4 and the pressing member 3. Then, the load transmission member 10 moves the connecting member 7 when the support member and the relative moving portion move relative to each other against the biasing member 13. According to such a configuration, when the piston 110 is inserted into the cylinder 102, the biasing member 13 receives the frictional resistance as a reaction force and is compressed between the cylindrical member 4 and the pressing member 3. When the biasing member 13 is compressed and the cylindrical member 4 and the shaft 9 move relative to each other, the connecting member 7 is moved by the load transmission member 10 connected to the shaft 9, and the connection between the lever 5 and the operating member 6 is released. As a result, the insertion of the piston 110 with an increased reaction force is automatically interrupted, so that the occurrence of defects in the piston 110 and the cylinder 102 can be prevented.

[0038] Furthermore, the load transmission member 10 has flexibility, and the support member has an engaging member that engages with an intermediate portion 10a of the load transmission member 10. When the support member and the relative moving portion move relative to each other against the biasing member, the engaging member pulls the load transmission member 10 to remove the connecting member 7 from the other of the operating member 6 and the lever 5. According to such a configuration, when the support member and the relative moving portion of the flexible load transmission member 10 move relative to each other, the intermediate portion 10a is pulled by the engaging member, and the connecting member 7 is removed from the other of the operating member 6 and the lever 5. Therefore, the connection between the lever 5 and the operating member 6 can be released with a simple structure.

[0039] The support member is a hollow cylindrical member 4, and the relative movement member is a shaft 9. One end side 9a of the shaft 9 is fixed to the pressing member 3, the shaft 9 is disposed inside the cylindrical member 4 so as to be relatively movable, and a load transmission member 10 is connected to the other end side 9b. The acting member is a lever 5 having one end side 5a fixed to the apparatus main body 2 by a hinge structure 2a, an intermediate portion 5b abutting against an end portion 4a of the cylindrical member 4, and the other end side 5c connected to the operating member 6 via a connecting member 7. The engaging member is a pulley 14 pivotally supported by the cylindrical member 4, and the load transmission member 10 is wound around the pulley 14. According to such a configuration, when the operating member 6 is operated, the intermediate portion 5b of the lever 5 abuts against the end portion of the hollow cylindrical member 4, and the pressing load is transmitted to the pressing member 3. When the shaft 9 relatively moves inside the cylindrical member 4, the intermediate portion of the load transmission member 10 is pulled by the pulley 14 pivotally supported by the cylindrical member 4. Thereby, the load transmission member 10 can move the connecting member 7 to release the connection between the lever 5 and the operating member 6.

[0040] Furthermore, the apparatus main body 2 has a holding portion 16 for holding the support member so as to be axially movable. The support member has a case 15 for accommodating the pulley 14, and a return spring 17 for pushing up the support member and the lever 5 is provided between the holding portion 16 and the case 15. Therefore, when the piston 110 is inserted into the cylinder 102, the return spring 17 compressed between the holding portion 16 and the case 15 pushes up the case 15 and the lever 5 when the pressing load from the lever 5 decreases. For this reason, the pressing device 1 can be easily returned to the initial position. More specifically, the urging member 13 of the embodiment connects between the pressing member and the lower end 4b of the cylindrical member 4. Thereby, when the case 15 and the lever 5 are returned by the return spring 17, the pressing member 3 can be pulled upward from inside the cylinder 102 and returned to the initial position where the piston 110 can be set.

[0041] A roller member 18 is rotatably provided at the end portion 4a on the operating member 6 side of the cylindrical member 4. Therefore, when the lever 5 is pushed down, the contact position of the middle portion 5b of the lever 5 is adjusted by the rotating roller member 18, and the pressing load can be smoothly transmitted to the pressing member.

[0042] Furthermore, in the pressing system 20 including a plurality of pressing devices 1, the operation member 6 is connected to a plurality of levers 5 via a plurality of connecting members 7 respectively. In the pressing system 20 configured as described above, by operating the operation member 6, a plurality of levers 5 can be rotated to simultaneously insert a plurality of pistons 110 into the cylinder 102. Then, the pistons 110 smoothly inserted to the desired position remain in the cylinder 102 as they are and enter the normal assembled state. Also, no defect has occurred in the uninserted pistons 110 whose connection by the connecting member 7 has been released. Therefore, only the uninserted pistons 110 can be reinserted and assembled immediately, improving the working efficiency.

[0043] Furthermore, in the embodiment, both end portions of the operation member 6 are hinge-fixed to the upper end portion of the device main body 2 via a pair of support arms 6b. Therefore, even when the connection of any one of the levers 5 is released, the other levers 5 can stably transmit the pressing load to the support member. Accordingly, it is possible to reduce the influence on the insertion work of the other pistons 110, and it is possible to exhibit a practically useful effect such as being suitable for use in the pressing system 20 including a plurality of pressing devices 1.

[0044] The present invention is not limited to the above-described embodiments, and various modifications are possible. The above-described embodiments are exemplified for easy understanding and explanation of the present invention, and are not necessarily limited to those having all the configurations described. Also, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Also, a part of the configuration of each embodiment can be deleted, or addition or replacement of other configurations can be made. Possible modifications to the above embodiments are, for example, as follows.

[0045] In this embodiment, as shown in FIG. 1, pistons 110 are inserted into four cylinders 102 of an in-line four-cylinder engine 100, but it is not particularly limited thereto. For example, in order to insert the piston 110 into an engine with a single cylinder or a multi-cylinder engine such as a three-cylinder engine, a plurality of pressing devices 1 corresponding to the number of cylinders 102 may be provided. For example, in the case where the cylinder arrangement direction L is V-shaped or horizontally opposed and arranged in parallel, the pressing system 200 may be used for each bank or each side for insertion. That is, any device that presses and inserts the piston 110 into the cylinder 102 may be used, and the number, shape, and arrangement of the cylinders 102 of the engine 100 and the number of corresponding pressing devices 1 are not particularly limited.

[0046] Further, as shown in FIG. 2, the connecting member 7 of this embodiment has a columnar connecting pin 7a, but it is not particularly limited thereto. For example, a connecting pin having another shape such as a prismatic shape may be used. That is, the connecting member 7 may be any device that connects between the lever 5 and the operating member 6 and is disposed so as to be able to protrude and retract into one of the operating member 6 and the lever 5 and be removed from the other, and the shape, number, and material of the connecting member 7 are not limited.

[0047] Furthermore, in this embodiment, the release mechanism 8 includes a load transmission member 10 constituted by a wire cable and a biasing member 13 having a spring member, but it is not particularly limited thereto. That is, any device that moves the connecting member 7 to release the connection between the lever 5 and the operating member 6 when the reaction force applied from the pressing member 3 to the cylindrical member 4 becomes a predetermined value or more may be used. For example, a gear mechanism may be used instead of the pulley 14, and the shape, number, and configuration of the release mechanism 8 such as the load transmission member 10 are not particularly limited.

[0048] In this embodiment, the pulley 14 is used as the engaging member and has been described. However, the present invention is not particularly limited thereto. For example, any member that engages with the middle portion of the load transmission member, such as an engaging pin, may be used. The shape, quantity, and material of the engaging member are not particularly limited. Further, the connecting member 7 may be configured to be retractable into and out of either the operating member 6 or the acting member, and to be disengaged from the other of the operating member 6 and the lever 5 when the load transmission member 10 is pulled. That is, the shape, quantity, and material of the connecting member 7 are not particularly limited.

Explanation of Reference Numerals

[0049] 1 Pressing device 3 Pressing member 4 Cylindrical member (supporting member) 5 Lever (acting member) 6 Operating member 7 Connecting member 8 Release mechanism 102 Cylinder (cylindrical body) 110 Piston (inserted member) H Axial direction

Claims

1. A pressing member that presses and inserts an inserted member into a cylinder; A support member that movably supports the pressing member along the axial direction of the cylinder; An acting member that moves the support member to apply a pressing load from the pressing member to the inserted member; An operating member for inputting the pressing load; A connecting member that connects between the acting member and the operating member; A release mechanism that moves the connecting member to release the connection between the acting member and the operating member when the reaction force applied from the pressing member to the support member reaches a predetermined value or more; A pressing device comprising the above, characterized in that.

2. The pressing member has a relative moving part that can move relative to the support member; The connecting member is disposed so as to be able to protrude and retract from one of the operating member and the acting member; The release mechanism has a load transmission member whose one end is connected to the connecting member and the other end is connected to the relative moving part, and a biasing member interposed between the support member and the pressing member; The pressing device according to claim 1, wherein the load transmission member moves the connecting member by relative movement of the support member and the relative moving part against the biasing member.

3. The load transmission member has flexibility; The support member has an engaging member that engages with an intermediate part of the load transmission member; The pressing device according to claim 2, wherein the engaging member pulls the load transmission member to remove the connecting member from the other of the operating member and the acting member when the support member and the relative moving part move relative to each other against the biasing member.

4. The support member is a hollow cylindrical member; The relative moving part is a shaft having one end fixed to the pressing member, disposed so as to be relatively movable inside the cylindrical member, and the load transmission member connected to the other end; The acting member is a lever having one end hinge-fixed to the device body, an intermediate part abutting against an end of the support member, and the other end connected to the operating member via the connecting member; The engaging member is a pulley pivotally supported by the support member; The pressing device according to claim 3, wherein the load transmission member is wound around the pulley.

5. The device body has a holding part that holds the support member so as to be axially movable; The support member has a case that houses the pulley; The pressing device according to claim 4, further comprising a return spring that pushes up the support member and the lever between the holding part and the case.

6. The pressing device according to claim 5, wherein a roller member is rotatably provided at an end of the support member on the side of the operating member.

7. A pressing system including a plurality of the pressing devices according to any one of claims 1 to 6, wherein the operating member is connected to the plurality of the acting members via the plurality of the connecting members respectively.

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