JP6525823B2 - Engagement device - Google Patents

Description

  The present invention relates to an engagement device engageable with and disengageable from an engagement recess formed in an object, and in particular, the engagement and disengagement operation with respect to the engagement recess can be easily performed, and there is no play when engaged. The present invention relates to an engagement device that can be stably and firmly fixed to an engagement recess.

  A wharf crane called a so-called low-profile crane is proposed, which has a slide type boom installed so as to be movable in the horizontal direction with respect to the leg structure (see, for example, Patent Document 1). The low profile crane described in Patent Document 1 moves a sliding boom from the land side to the sea side when carrying out cargo handling work after landing of a ship. At this time, the sliding boom is supported by the support member installed in the leg structure, and the sliding boom is fixed to the leg structure by the frictional force generated with the support member.

  Since the trolley for loading and unloading the container 50 to 70 m below must be aligned with the container to be loaded with high accuracy, the sliding boom traversed by the trolley is sure to the leg structure It is desirable that it is fixed.

  However, in the wharf crane described in Patent Document 1, since the sliding boom is fixed to the support member by the frictional force, vibration in the transverse direction generated by the trolley traversing along the sliding boom during cargo handling work or There is a possibility that the sliding boom may move in the transverse direction due to the influence of wind or the like.

  Therefore, a method may be considered in which an engaging portion is formed in the leg structure by drilling or the like, and an anchor installed on the slide type boom side is vertically inserted into the engagement portion to fix the slide type boom. However, in order to facilitate the insertion and removal of the anchor, the engaging portion formed on the leg structure needs to be formed slightly larger than the outer shape of the anchor to provide a so-called allowance. Therefore, the sliding boom may move relative to the leg structure by the amount of play. That is, it is disadvantageous to accurately determine and fix the position of the sliding boom relative to the leg structure.

  In addition, when there is a clearance between the anchor and the engaging portion, the anchor and the engaging portion collide with each other with the movement of the sliding boom, and there is an adverse effect that a large impact force is generated at the anchor and the engaging portion. If the play allowance is eliminated, this impact force can be greatly reduced, but the work of inserting and removing the anchor in the engagement portion becomes difficult.

  Furthermore, when the anchor is used, the slide boom moves in the anchor section inserted into the engagement section due to the influence of vibration etc., and the anchor may be strongly pressed against the engagement section of the slide boom. . Thus, when the engaging portion bites into the anchor, the frictional force between the side surface of the anchor and the engaging portion significantly increases, making it difficult to pull out the anchor. The above-mentioned problems occur not only when the sliding boom is fixed in a wharf crane, but also when an object is engaged with an object and fixed.

  In methods other than the anchor type, there is a method in which the slide type boom is gripped by a clamp or the like and fixed by a frictional force, but the clamp force tends to decrease due to the wear of the grip portion, and maintenance and management are not easy.

JP, 2011-152998, A

  The present invention has been made in view of the above problems, and an object of the present invention is to easily perform engagement and disengagement operations with respect to the engagement recess, and when engaged, there is no play and stably and firmly fixed to the engagement recess. An engagement device that can

An engagement device according to the present invention for achieving the above object is an engagement device that releasably engages with an engagement recess formed in a target object, wherein the support shaft and the support shaft are rotatable. comprising a pair of arms that are connected in the state, and a driving portion for rotating said pair of arms around the said shaft, by the driving unit, wherein the pair of arms becomes a predetermined opening angle and a lock position where the opening angle about said support shaft by coupling face each other are formed respectively on the pair of arms are in contact it becomes impossible rotated in a direction of increasing, the opening angle than the opening angle of the locking position Is rotated to the standby position where the pair of arms are rotatable about the support shaft, and the pair of arms in the standby position are inserted into the engagement recess formed in the object And then pivoted to the locked position Te, the leading end of each of the arms is pressed against the opposing surfaces of the engaging recess, characterized in that said pair of arms has a configuration to be fixed to the engaging recess.

  According to the present invention, when the engagement device is inserted into the engagement recess, the distal end portions of the arms can be made to approach each other by moving the pair of arms to the standby position, and the outer shape of the engagement device can be reduced. The engagement device can be easily inserted into the engagement recess.

  After inserting the engagement device into the fitting recess, move the pair of arms to the lock position to bring the tip of the arm into contact with the opposing surface of the engagement recess without any allowance. Can. Since there is no clearance between the opposite surface of the engagement recess and the tip of the arm, the engagement device can be reliably fixed to the engagement recess. Also, even when the tip of one arm receives an external force in the direction approaching toward the surface of the engaging recess to be in contact, there is no allowance, so that the tip of the arm and the surface of the engaging recess It can suppress that an impact force arises between them.

  Here, for example, the opening angle of the pair of arms rotated to the lock position can also be set to 180 degrees. According to this configuration, since the pair of arms rotated to the lock position are in a straight line, even if an external force is generated in the axial direction of the arms, a rotational force centering on the support shaft is hardly generated in the arms. Therefore, even if a large external force is generated in the axial direction of the pair of arms, it is easy to maintain the pair of arms in the lock position, which is advantageous for reliably fixing the engagement device to the engagement recess.

  An extension mechanism may be provided to move the pair of arms closer to and away from the engagement recess. According to this configuration, the engagement and disengagement by the engagement device can be easily performed by the expansion and contraction of the expansion and contraction mechanism.

  The arm may also be configured with a roller located at the tip and rotating in contact with the engagement recess. According to this configuration, when the engagement device is inserted into the engagement recess, the pair of arms can smoothly rotate within the engagement recess due to the rotation of the roller in contact with the engagement recess.

  The support shaft may be configured to be provided with a guide member that guides the support shaft in the movement direction of the engagement device when being inserted into the engagement recess and restrains movement in the other direction. According to this configuration, since the engagement device can be inserted straight into the engagement recess, occurrence of problems such as the pair of arms not rotating toward the lock position when the engagement device is inserted Can be avoided.

It is explanatory drawing which illustrates the cargo handling operation state of the wharf crane which installs the engagement apparatus of this invention. It is explanatory drawing which illustrates the idle state of the wharf crane shown in FIG. It is an explanatory view which illustrates the engagement device of the present invention in which the arm is in the standby position in a front view. It is explanatory drawing which illustrates the engagement apparatus shown in FIG. 3 in an AA cross section. It is an explanatory view which illustrates an engagement device in which an arm is in a locked position by plain view. It is explanatory drawing which illustrates the engagement apparatus shown in FIG. 5 in a BB cross section. It is an explanatory view which illustrates the front and bottom of a pair of arms which were disassembled. It is explanatory drawing which illustrates another embodiment of an engagement apparatus by a side view. It is explanatory drawing which illustrates the front and bottom face of a pair of arm shown in FIG. It is an explanatory view which illustrates another embodiment of an engagement device by plain view. It is explanatory drawing which illustrates the engagement apparatus shown in FIG. 10 in a CC cross section. It is explanatory drawing which moves the arm of the engagement apparatus shown in FIG. 10 to a locked position, and illustrates it by DD cross section. It is explanatory drawing which illustrates another embodiment of an engagement apparatus. It is explanatory drawing which moves the arm of the engagement apparatus shown in FIG. 13 to a locked position, and illustrates it by EE cross section. It is explanatory drawing which illustrates the modification of the engaging device shown in FIG. It is explanatory drawing which illustrates the state which moved the arm of the engagement apparatus shown in FIG. 15 to the locked position.

  Hereinafter, the case where the engagement device of the present invention is installed in a wharf crane will be described based on the embodiment shown in the drawings.

As illustrated in FIGS. 1 and 2, the quay crane 1 is attached to the lower end portion of the leg structure 4 having the sea side leg 2 and the land side leg 3 and the lower end of the leg structure 4. And a traveling device 5 for traveling in the traveling direction. In the drawings , the transverse direction which is the opposing direction of the sea side leg 2 and the land side leg is indicated by x, the traveling direction of the traveling device 5 by y, and the vertical direction by z.

  The wharf crane 1 further includes a suspension structure 6 suspended by the leg structure 4 and a slideable boom 7 supported by the suspension structure 6 and slidable in the transverse direction x. The slide boom 7 is in the rest position illustrated in FIG. 2 before the vessel 8 such as a container ship is docked, and after the vessel 8 is docked, when the cargo handling operation is started by the quay crane 1 It moves to the work position illustrated in FIG. The sliding boom 7 is fixed to the leg structure 4 by the engagement device of the present invention after the sea side or land side movement is completed. The wharf crane 1 performs loading and unloading of the container 10 and the like mounted on the ship 8 by the trolley 9 traversing along the slide type boom 7.

  As illustrated in FIG. 3 and FIG. 4, the engagement device 11 of this embodiment is fixed to the side surface of the sliding boom 7 which is a moving body by means of a fixing tool 12, and a leg structure 4 or a suspension structure which is an object. The engaging recess 13 formed on the top surface of the body 6 is configured to be engageable and disengageable. In FIG. 3 and FIG. 4, the engagement recess 13 formed by penetrating a member installed on the top surface of the leg structure 4 is indicated by a broken line for the sake of explanation.

The engagement device 11 includes a pair of arms 14 and a support shaft 15 that rotatably supports the arms 14. The support shaft 15 is connected to the drive unit 17 via a connecting tool 16 disposed so as to sandwich the front and back of the arm 14. In this embodiment, the drive unit 17 is configured by an extension cylinder 17 that can extend and retract in the vertical direction z to move the arm 14 closer to and away from the engagement recess 13. In addition, in FIG. 3, the connection tool 16 is shown with a broken line for description, and the state which looked at the spindle 15 behind it is shown in figure.

  The pair of arms 14 connected by the support shaft 15 includes rollers 18 which are rotatably installed at the outer end opposite to the inner end through which the support shaft 15 passes. The roller 18 is formed in a substantially cylindrical shape, and is installed on both sides of the front and back of the arm 14 in a state in which the arm 14 is sandwiched.

  The engagement recess 13 is formed in a state of being opened toward the engagement device 11 and having the transverse direction x, which is the movement direction of the slide type boom 7, as the longitudinal direction. The engagement recess 13 has a pressing surface 19 that is pressed by the roller 18 installed at the outer end of the arm 14 when the arm 14 is inserted. The pressing surface 19 is an opposing surface located on the axis of the moving direction (transverse direction x) of the slide type boom 7 which is a movable body, and is formed of a curved surface along the circumferential surface of the roller 18. The engagement recess 13 may be directly formed in the leg structure 4 or the suspension structure 6 by drilling or the like, and a separately prepared member is pierced to form the engagement recess 13 as illustrated in FIGS. 3 and 4. This member may be installed in the leg structure 4 or the like.

  The arm 14 illustrated in FIG. 3 is in the standby position, and is an angle formed by the pair of arms 14 in the standby position, and the opening angle θ on the engagement recess 13 side is smaller than 180 °. The opening width W1 of the arm 14 in the transverse direction x is smaller than the opening width Wx between the opposing pressing surfaces 19 of the engagement recesses 13. The opening width W1 of the arm 14 refers to the maximum total length of the arm 14 and the roller 18 in the transverse direction x. Further, as illustrated in FIG. 4, the length of the traveling direction y of the engagement recess 13 is indicated by Wy.

  Next, a method of fixing the slide type boom 7 as the movable body to the leg structure 4 as the object by the engagement device 11 will be described. First, the sliding boom 7 is moved to the loading operation position shown in FIG. 1 or the rest position shown in FIG. 2 to align the engagement device 11 with the engagement recess 13 corresponding to the loading operation position or the rest position. After this alignment is completed, the extension cylinder 17 of the engagement device 11 is extended to move the pair of arms 14 toward the engagement recess 13. Since the opening width W1 of the arm 14 in the standby position is smaller than the opening width Wx of the engagement recess 13, the arm 14 can be smoothly inserted into the engagement recess 13.

  When the roller 18 installed at the outer end of the arm 14 contacts the bottom surface or the like of the engagement recess 13, the roller 18 moves in the direction away from each other while rotating, and the pair of arms 14 opens accordingly . Therefore, the extension cylinder 17 can be said to be a drive unit 17 that rotates the arm 14 around the support shaft 15.

  When the extension cylinder 17 is further extended, the rollers 18 are respectively pressed by the pressing surface 19 of the engagement recess 13 as illustrated in FIGS. 5 and 6, and the pair of arms 14 are in the lock position. 5 and 6, in order to show the state of the arm 14 inserted into the engagement recess 13, the engagement recess 13 is shown in a cross section cut along the transverse direction x or the traveling direction y.

  In this embodiment, the opening angle θ of the arm 14 in the locked position is 180 °. The opening width W2 of the arm 14 in the locked position is designed to be the same as the opening width Wx of the engagement recess 13. Therefore, no allowance occurs between the roller 18 installed at the outer end of the arm 14 and the opposing pressing surface 19 of the engagement recess 13.

Therefore, even if vibration in the transverse direction x which is the axial direction of the arm 14 is generated in the slide boom 7, it is difficult to generate an impact between the roller 18 and the pressing surface 19 which are in contact with each other without play. The durability of the engagement device 11 can be improved. Since the pressing surface 19 has a curved surface along the circumferential surface of the roller 18, the contact area between the pressing surface 19 and the roller 18 is increased, and the force generated between the pressing surface 19 and the roller 18 is dispersed. It can be supported. Since the force does not concentrate on a specific part, it is advantageous for suppressing the wear of the pressing surface 19 and the like.

  Further, since the roller 18 contacts with the engagement recess 13 while rolling, it is advantageous for suppressing the wear of the engagement recess 13 due to the contact with the roller 18. It is possible to suppress the occurrence of a gap between the engagement recess 13 and the roller 18 due to wear. The pressing surface 19 is not limited to the curved surface along the circumferential surface of the roller 18, and may be formed by another curved surface or a flat surface. For example, the pressing surface 19 may be formed by penetrating the engagement recess 13 from above into a rectangular shape. It is advantageous to suppress the manufacturing cost of the engagement recess 13.

  As exemplified in FIG. 6, the opening width Wy in the traveling direction y of the engagement recess 13 may be a size that allows the arm 14, the roller 18 and the like to move smoothly in the engagement recess 13. The opening width Wy is preferably set to be slightly larger than the width in the running direction y of the engagement device 11 inserted into the engagement recess 13 so that the roller 18 can be prevented from shifting in the running direction y.

  As illustrated in FIG. 7, in this embodiment, the pair of arms 14 have coupling surfaces 20 that contact each other when in the locked position. The connecting surface 20 is a surface having a direction orthogonal to the transverse direction x, which is the moving direction of the sliding boom 7. When the engagement device 11 is engaged with the engagement recess 13 and the arm 14 is in the lock position, the pair of arms 14 become an apparently one linear arm in the transverse direction x due to the contact of the coupling surface 20 . Therefore, when a force in the transverse direction x, which is the moving direction of the slide boom 7, is generated, the pair of arms 14 that form an apparently linear arm resists the axial compressive force (axial force). Then, since the engagement can be maintained, the sliding boom 7 can be effectively fixed to the leg structure 4.

  Since this axial force acts on the arm 14 from the pressing surface 19 of the engagement recess 13, the coupling surface 20 of the arm 14 is located at a position lower than the upper end surface of the engagement recess 13 when the engagement device 11 is inserted. It is desirable to have a configuration. That is, the connecting surface 20 is positioned on the axis connecting the opposing pressing surfaces 19. According to this configuration, since an axial force is generated in the coupling surface 20 and in a direction perpendicular to the coupling surface 20, no rotational moment is generated in the arm 14 by this axial force. Therefore, even if the extension cylinder 17 does not press the arm 14 against the engagement recess 13 with a large force, the lock position of the pair of arms 14 can be easily maintained, and the engagement by the engagement device 11 can be maintained.

  When the arm 14 is in the lock position, for example, at a position higher than the upper end face of the pressing surface 19, if the coupling surface 20 is not located on the axis connecting the opposing pressing surfaces 19, vibration of the slide boom 7 or the like Along with this, a rotational moment may occur on the arm 14. In this case, the arm 14 can be maintained in the locked position by pressing the arm 14 against the engagement recess 13 with a relatively small force using the extension cylinder 17. The configuration in which the arm 14 is pressed against the engagement recess 13 by the extension cylinder 17 can also be adopted when the coupling surface 20 is positioned on the axis connecting the opposing pressing surfaces 19. Thereby, the lock position of the arm 14 can be maintained more reliably.

  Even when the positions of the engagement device 11 and the engagement recess 13 are shifted, the engagement device 11 of the present invention can be inserted into the engagement recess 13. If the engagement device 11 is inserted into the engagement recess 13 when the alignment is not sufficient, any one of the rollers 18 of the arms 14 that deploys from the standby position toward the lock position is the pressing surface corresponding to this roller 18 first. Contact 19 Thereafter, when the arm 14 is further pushed into the engagement recess 13 by the extension cylinder 17, a force in the horizontal direction is generated between the arm 14 in contact with the pressing surface 19 and the engagement recess 13, and this force is generated. As a result, the sliding boom 7 which is a moving body moves. Thereby, position alignment with engagement device 11 and engagement crevice 13 can be performed automatically.

  When releasing the engagement by the engagement device 11, the telescopic cylinder 17 is contracted to pull out the arm 14 from the engagement recess 13. For example, when the anchor is inserted into and engaged with the engagement portion, the anchor may be pressed against the engagement portion by vibration or the like generated in the slide type boom 7, and the anchor may not be pulled out. That is, the engaging portion is in a state of biting in the anchor, and in order to pull out the anchor, the slide type boom 7 must be moved in some way to cancel this state.

  On the other hand, even in such a case, the engagement device 11 of the present invention rotates the arm 14 from the lock position toward the standby position to reduce the opening width of the arm 14, thereby reducing the engagement recess 13. Thus, the pair of arms 14 can be easily pulled out to release the engagement.

  As illustrated in FIG. 8, the telescopic cylinder 17 may support the arm 14 in a cantilever state via the connector 16. In this embodiment, the connector 16 is installed in contact with the front of the arm 14, and the support shaft 15 is installed through the arm 14 and the connector 16 so as to connect the connector 16 to the extension cylinder 17. It is connected. The connection between the arm 14 and the extension cylinder 17 is not limited to the above configuration, and the arm 14 may be connected to the extension cylinder 17 in a rotatable state with respect to the support shaft 15.

  In the embodiment illustrated in FIGS. 8 and 9, one roller 18 is installed in a notch 21 formed in the outer end of the arm 14. According to this configuration, the width of the arm 14 and the roller 18 in the traveling direction y can be reduced, which is advantageous for miniaturizing the engagement device 11. Further, the opening width Wy in the traveling direction y of the engagement recess 13 can also be reduced.

  However, in the configuration in which the rollers 18 are installed on the front and back of the arm 14 as illustrated in FIG. 7, the force in the twisting direction is less likely to be transmitted from the roller 18 in contact with the engagement recess 13 to the arm 14. That is, since the roller 18 is easy to move straight in the transverse direction x in the engagement recess 13 and is hard to shift in the running direction y, the engagement device 11 can be engaged more smoothly.

  In the embodiment illustrated in FIG. 8, the engagement recess 13 is formed directly on the leg structure 4. According to this configuration, the engagement device 11 of the present invention can be easily adopted even when the space for installing the engagement device 11 is narrow, such as the space between the slide boom 7 and the leg structure 4. .

  The outer end portions of the pair of arms 14 may be configured to slide and move in the engagement recess 13 without installing the roller 18 on the arm 14. In this case, it is desirable to install a lubricating member such as nylon or fluorine resin in a part of the arm 14 and at least in a portion in contact with the engagement recess 13 or inside the engagement recess 13. As a result, the arm 14 can be deployed smoothly. In addition, since the arm 14 and the engagement recess 13 can be made smaller by not installing the roller 18, it is advantageous to miniaturize the engagement device 11. Miniaturization also makes it possible to incorporate the engagement device 11 into any mechanism such as a car or stationery as one of the machine elements.

  In the embodiment illustrated in FIGS. 10-12, the engagement device 11 comprises a guide member 22. The guide member 22 is fixed to the side surface of the slide boom 7 in a state of being on the front side of the arm 14 and has an elongated hole 23 whose longitudinal direction is the vertical direction z which is the same direction as the extension cylinder 17 ing. The elongated hole 23 is configured to guide the support shaft 15 when the arm 14 moves from the standby position to the lock position. Therefore, the elongated hole 23 is formed to a height reaching the inside of the engagement recess 13. The telescopic cylinder 17 is fixed to the bottom of the sliding boom 7. The place which fixes this expansion-contraction cylinder 17 and the guide member 22 can be suitably determined not only in the above.

  In order to avoid interference with the guide member 22, the engagement recess 13 is formed in an open state without having a side wall extending in the transverse direction x on the front side of the arm 14. With this side wall, when moving the sliding boom 7, the guide member 22 can not collide with the engagement recess 13 to move the sliding boom 7.

  With the configuration in which the guide member 22 is installed, the arm 14 and the support shaft 15 can be inserted straight into the engagement recess 13 while being guided by the guide member 22. Therefore, the engagement device 11 can be smoothly inserted into the engagement recess 13.

  Further, as illustrated in FIG. 12, when, for example, vibration in the transverse direction x is generated in the sliding boom 7 in a state where the engagement device 11 is engaged with the engagement recess 13, the arm in the locked position as described above 14 maintains engagement against the axial force. At this time, a force in the transverse direction x is also generated in the extended telescopic cylinder 17, but the force in the transverse direction x can be supported by the guide member 22 via the support shaft 15. Even if a large force is generated in the transverse direction x, a failure such as a large horizontal force generated in the telescopic cylinder 17 and deformation of the telescopic cylinder 17 can be avoided, so that the engagement device 11 can be used stably. Is advantageous.

  The method of fixing the telescopic cylinder 17 to the sliding boom 7 is not limited to the configuration in which the telescopic cylinder 17 is rigidly coupled by the fixing tool 12 or the like. The telescopic cylinder 17 can be installed, for example, in a pin supporting state with respect to the sliding boom 7.

  The upper end of the extension cylinder 17 can be set in a pin-supporting state so as to be capable of tilting in the transverse direction x. According to this configuration, when the telescopic cylinder 17 receives a horizontal force in the transverse direction x, the telescopic cylinder 17 tilts to release this force. It is advantageous to avoid the failure of the telescopic cylinder 17 from being deformed by the horizontal force in the transverse direction x. In the case of the configuration in which the guide member 22 is installed, the position in the transverse direction x of the arm 14 engaged with the engagement recess 13 is restrained by the guide member 22 so that the problem of displacement of the engagement position does not occur.

  Further, the guide member 22 is not installed, and the upper end of the extension cylinder 17 can be in the state of being able to tilt in the traveling direction y with the pin supported state. According to this configuration, since the telescopic cylinder 17 does not tilt even when subjected to horizontal force in the transverse direction x, the leg structure 4 and the slide type boom 7 can be accurately aligned in the transverse direction x.

  In the case where the upper end of the extension cylinder 17 is in a pin supporting state and the guide member 22 is not disposed, it is desirable to install a fall prevention member that restricts the range in which the extension cylinder 17 tilts within a predetermined range.

  Even when the engagement device 11 is inserted into the engagement recess 13 in a state where the engagement device 11 and the engagement recess 13 are misaligned as described above, there is a possibility that horizontal force may be generated in the telescopic cylinder 17. Since this force can also be supported by the guide member 22, it is advantageous for the protection of the telescopic cylinder 17.

The guide member 22 is not limited to the above-described configuration, and may have a configuration that blocks movement of the support shaft 15 in the transverse direction x and allows movement in the vertical direction z. Further, the bulging portion 24 having a size that can not pass through the long hole 23 in the traveling direction y may be disposed on the support shaft 15 in a state in which the guide member 22 is sandwiched from both sides. The bulging portion 24 can prevent movement of the support shaft 15 in the traveling direction y. Thus, horizontal force in the traveling direction y can also be supported by the telescopic cylinder 17, which is further advantageous for protection of the telescopic cylinder 17.

  As illustrated in FIGS. 13 and 14, the engagement device 11 may be configured to include a guide member 22 disposed so as to sandwich the arm 14 from both sides in the traveling direction y. In FIG. 13, the connector 16 and the extension cylinder 17 are shown by broken lines for the sake of explanation.

  In this embodiment, the engagement device 11 includes a connector 16 formed long above the support shaft 15, and a pair of projecting bodies 25 projecting horizontally from the opposing side surfaces of the connector 16. There is. The projecting body 25 is a flat plate having a plane extending in the traveling direction y and the vertical direction z. The projecting body 25 is inserted into the long hole 23 of the guide member 22 and is movable in the vertical direction z.

  Due to the structure in which the connector 16 is formed long in the vertical direction z and the projecting body 25 is fixed in the vicinity of the upper end thereof, even when the arm 14 is in the locking position as illustrated in FIG. 25 is located above the engagement recess 13. Therefore, the guide member 22 can be formed to a length such that the lower end thereof does not reach the engagement recess 13. Since it is not necessary to remove the side wall extending in the transverse direction x of the engagement recess 13, it is advantageous to prevent the failure of the arm 14 jumping out of the engagement recess 13 or the like.

  Since the guide members 22 are disposed on both sides in the traveling direction y of the engagement device 11, it is advantageous for stably holding the engagement device 11 in a predetermined position. The guide members 22 may be disposed so as to sandwich the engagement device 11 from both sides in the transverse direction x. At this time, the projecting body 25 is protruded from the connector 16 in the direction of penetrating the long hole 23 of the guide member 22.

  The shape of the arm 14 is not limited to a linear shape, and a bent arm 14 or a curved arm may be employed. Further, the opening angle θ of the pair of arms 14 in the lock position can be made larger or smaller than 180 °. However, in the above case, there is a possibility that a moment to rotate the arm 14 may be generated by the horizontal force transmitted from the engagement recess 13. Therefore, the arm 14 is pressed against the engagement recess 13 by the extension cylinder 17. It is necessary to prevent the lock position from being released.

  The drive unit 17 is not limited to the extension cylinder, and may be configured by combining, for example, a motor for rotating the support shaft 15, and an elevating mechanism for moving the support shaft 15 in the vertical direction z. In this case, the motor may be braked to maintain the lock position of the pair of arms 14. Further, one end is supported by the sliding boom 7 so as to be tiltable, and the other end is constituted by a swing arm having a pair of arms 14 installed, and the arm 14 is moved closer to and away from the engagement recess 13 by tilting of the swing arm. It can also be configured.

  Although the above-mentioned embodiment explained the composition which installs engagement device 11 in slide type boom which is a mobile, and forms engagement crevice 13 in leg structure 4 which is a target object, it engages with the mobile side. It is also possible to form the recess 13 and install the engagement device 11 on the fixed side.

  The engagement device 11 has a function of restraining the movable body in the axial direction of the arm 14 when the arm 14 is deployed. Therefore, for example, the movable body or the like when the axial direction of the arm 14 is the vertical direction z Can be configured to restrain movement of the movable body in the vertical direction z.

  By using the plurality of engagement devices 11 in combination, for example, the mobile body can be restrained with respect to a direction combining any one or more of the transverse direction x, the traveling direction y and the vertical direction z.

  As illustrated in FIGS. 15 and 16, the pressing surface 19 of the engagement recess 13 can be configured to include a top plate 26 that covers at least a part of the upper surface of the roller 18 of the arm 14 in the locked position. After the pair of arms 14 is inserted into the engagement recess 13 and moved to the lock position, the pair of arms 14 are fixed and not tilted with respect to the support shaft 15.

  To fix the pair of arms 14, for example, the fixing piece 27 is installed on the side surface of one arm 14, and the locking piece 28 for locking the fixing piece 27 on the side surface of the other arm 14 is installed. Can be performed by locking the locking piece 28. The distance between the pair of arms 14 is fixed by the fixing piece 27.

  The fixation of the pair of arms 14 is not limited to the above-described configuration, as long as the fixation and the fixation of the pair of arms 14 can be released. For example, the arm 14 can be fixed to the support shaft 15 by, for example, sliding the support shaft 15 in the axial direction.

  The pair of arms 14 are fixed without closing and the upper surface side of the roller 18 is restrained by the top plate portion 26 of the pressing surface 19, so the sliding boom 7 moves in the vertical direction z with respect to the leg structure 4 Can be prevented. That is, the engagement device 14 can realize restraint not only in the transverse direction x but also in the vertical direction z.

  When releasing the engagement by the engagement device 11, first, the fixing of the pair of arms 14 by the fixing piece 27 or the like is released, and then the telescopic cylinder 17 is contracted. The pair of arms 14 are brought close to each other and pulled out of the engagement recess 13 to release the engagement by the engagement device 11.

  In addition, the structure which forms the top plate part 26 is similarly employable also in above-mentioned other embodiment, such as FIG.3 and FIG.8.

Reference Signs List 1 quayside crane 2 sea side leg 3 land side leg 4 leg structure 5 traveling device 6 suspension structure 7 sliding boom 7 ship 9 trolley 10 container 11 engagement device 12 fixing device 13 engagement recess 14 arm 15 support shaft 16 connection Tool 17 Drive part (extension cylinder)
Reference Signs List 18 roller 19 pressing surface 20 coupling surface 21 notch 22 guide member 23 elongated hole 24 bulging portion 25 projecting body 26 top plate 27 fixing piece 28 locking piece x lateral direction y traveling direction z vertical direction

Claims (5)

In an engagement device that releasably engages with an engagement recess formed in a target object,
A spindle, a pair of arms rotatably connected to the spindle, and a driving unit for pivoting the pair of arms around the spindle.
The driving unit rotates the pair of arms at a predetermined opening angle so that the coupling angles formed on the pair of arms are in contact with each other so that the opening angle increases about the pivot. The lock position which is impossible and the stand-by position in which the pair of arms are smaller than the open angle of the lock position and whose pair of arms are pivotable about the spindle;
After inserting the pair of arms in the standby position into the engagement recess formed in the object, the arms are pivoted to the lock position, and the tip portions of the respective arms face the engagement recess. An engaging device characterized in that the pair of arms are fixed to the engagement recess by pressing on a surface.   The engagement device according to claim 1, wherein an opening angle of the pair of arms rotated to the locked position is 180 degrees.   The engagement device according to claim 1 or 2, further comprising: a telescopic mechanism for moving the pair of arms closer to and away from the engagement recess.   The engagement device according to any one of claims 1 to 3, wherein the arm comprises a roller at the tip that rotates in contact with the engagement recess.   The guide member according to any one of claims 1 to 4, further comprising: a guide member configured to guide the support shaft in the movement direction of the engagement device when inserted into the engagement recess and to restrict movement in the other direction. Engagement device as described.

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