JP2019094960A - Slipping-out prevention device and work machine having the same - Google Patents

Abstract

To provide a slipping-out prevention device capable of easily performing an operation of attaching a stopper member to ensure that the stopper member is in a state that prevents a pin from coming off even the space adjacent to a hole member is narrow on the coming off side of the pin.SOLUTION: A slipping-out prevention device 1 comprises: a stationary portion 2; and a stopper member 4. The stopper member 4 includes: an attachment part 23 attachable to the stationary portion 2; with the attachment part 23 attached to the stationary portion 2, a shaft member 124 has stop parts 25a and 25b for stopping movement of the shaft member toward the removal side. The stationary portion 2 has a male part 13 extending the fitting direction. The attachment part 23 is a female part 22 capable of receiving the male part 13 along the mounting direction, there is one that restrains the stopper member 4 in the stop position by fitting with the male portion 13. The stop position is a position at which the stop parts 25a and 25b abut against the extraction side surface 132a to prevent the shaft member 124 from moving toward the removal side.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a retaining device and a working machine provided with the same.

  Heretofore, in working machines, a retaining device is provided for preventing a pin inserted in a pin hole of a hole member from coming out of the pin hole. Patent Document 1 below discloses an example of such a retaining device.

  Specifically, in Patent Document 1 below, in the mobile crane, in order to secure the stability moment of the crane when the optional device such as the optional winch is not attached to the upper revolving superstructure, the alternative weight as an alternative to the optional device is An arrangement for installation on a pivot is disclosed, wherein a snap-on link for fixing this alternative weight to the upper pivot is connected by a pin to the mounting plate of the upper pivot. In the configuration of Patent Document 1, a retaining device is provided in order to prevent removal of a pin connecting the spring link to the mounting plate.

  Specifically, in the configuration of Patent Document 1, the mounting plate is erected on the side plate provided on the upper swing body, and between the forks including the pair of plate-like portions provided on the springing link. The mounting plate is inserted into the The pin is inserted into the pin hole provided in the mounting plate and the pin hole provided in the fork portion, whereby the fork portion of the non-return link is connected to the mounting plate.

  The retaining device provided in the configuration of Patent Document 1 is configured of a key plate and a bolt. The pin has a portion which protrudes from the fork portion of the springing link in the direction of withdrawal of the pin in a state of being inserted into the pin hole, and a key groove extending in the circumferential direction is formed on the outer peripheral surface of the portion The key plate is fitted into the key groove. The key plate is superimposed on the surface of the fork portion of the spring link facing the withdrawal side of the pin and is fastened to the fork portion by a bolt. Thus, the key plate prevents axial movement of the pins, and as a result, the pins are prevented from coming out of the pin holes.

JP, 2009-107750, A

  According to the retaining device of Patent Document 1, the key plate is fastened to the fork with a bolt, but in a working machine, the space adjacent to the hole member on the withdrawal side of the pin from the pin hole is a bolt fastening It may be so narrow that it is difficult to perform work, and in this case, the retaining device of Patent Document 1 can not be adopted.

  The object of the present invention is to attach the retaining member so that the retaining member prevents the pin from disengaging even when the space adjacent to the hole member on the withdrawal side of the pin from the pin hole is narrow. An object of the present invention is to provide a retaining device capable of easily performing work and a working machine provided with the same.

  The present invention provides a shaft member including a hole member provided with a pin hole, and a pin having a central axis extending in a certain direction and inserted into the pin hole along the central axis. A retaining device provided on a working machine having a withdrawal side surface facing the withdrawal side of the pin from the pin hole, for preventing withdrawal of the pin from the pin hole. The retaining device is disposed at the position on the withdrawal side with respect to the hole member and fixed to the fixing portion fixed to the working machine, and is attached to the fixing portion, and the pin is inserted into the pin hole And a retaining member for blocking movement of the shaft member to the removal side in a state, wherein the retaining member approaches the fixing portion along a mounting direction intersecting with the central axis. The fixing portion has an attaching portion that can be attached to the fixing portion, and a detachment preventing portion that prevents the movement of the shaft member toward the withdrawal side in a state where the attaching portion is attached to the fixing portion. One of the portion and the attachment portion has a male portion extending along the attachment direction, and the other of the fixing portion and the attachment portion receives the male portion along the attachment direction Possible female part There is a device for restraining the retaining member in the retaining position in the axial direction which is the extension direction of the central axis by fitting with the received male part, and the retaining position is the retaining member is the retaining member It is a position which blocks movement to the above-mentioned withdrawal side of the above-mentioned shaft member by abutting on a withdrawal side.

  According to this retaining device, the mounting portion of the retaining member can be attached to the fixing portion only by making the retaining member approach the fixing portion along the mounting direction intersecting with the central axis of the pin. Since the retaining member can be restrained to the retaining position where the retaining part abuts against the withdrawal side surface of the shaft member to block the movement of the shaft member to the withdrawal side, the withdrawal side of the pin from the pin hole Even when the space adjacent to the hole member is narrow, the work of attaching the removal member can be easily performed such that the removal prevention member is in a state of preventing the pin from coming out of the pin hole.

  Specifically, in this retaining device, the male portion of one of the fixing portion and the mounting portion of the retaining member extends along the mounting direction of the mounting portion of the retaining member to the fixing portion, and the other portion has Since the female part receives the male part along the mounting direction and engages with the male part, the retaining member is made to approach the fixing part along the mounting direction in order to restrain the retaining member at the retaining position. The male part and the female part can be fitted and the mounting part of the retaining member can be attached to the fixing part only by the operation, and at the retaining position where the retaining part abuts on the extraction side surface of the shaft member A retaining member can be arranged to restrain the retaining member at that position. For this reason, even if the space adjacent to the hole member is narrow on the withdrawal side of the pin from the pin hole, it is not necessary to carry out the mounting operation of the retainer member in such a narrow space. The mounting operation of the retaining member can be easily performed.

  The retaining part includes a first retaining part and a second retaining part located on both sides of an opening which can receive the shaft member in the mounting direction, and the retaining position is Preferably, the shaft member enters into the opening, and the first and second retaining portions abut against the extraction side surface to prevent movement of the shaft member toward the removal side. .

  According to this configuration, in order to fit the male portion and the female portion, the retaining member can be brought close to the fixing portion along the mounting direction intersecting with the central axis of the pin. The shaft member can be inserted into the opening between the first retaining portion and the second retaining portion, and the retaining member can be installed in a more stable state. Specifically, in a state in which the shaft member is in the opening between the first retaining portion and the second retaining portion, the first and second retaining portions are disposed so as to sandwich the shaft member from both sides. Therefore, for example, even when an external force in the rotational direction around the male portion acts on the retaining member, the first or second retaining member abuts against the shaft member to counter the external force. It is possible to prevent the retaining member from rotating and coming off the shaft member. Therefore, according to this configuration, the retaining member can be installed in a more stable state.

  The retaining device is a receiving portion fixed to the work machine, and the first and second retaining members are configured to prevent the first and second retaining members from being displaced to the removal side. It is preferable to further include one that receives the above from the exit side.

  According to this configuration, even when the first and second retaining portions in contact with the extraction side surface of the shaft member receive a force from the shaft member to the removal side, the first and second receiving members (2) The displacement of the retaining portion toward the removal side is prevented. For this reason, it is possible to prevent the occurrence of deformation of the retaining member or unintentional detachment of the retaining member from the fixing member and the shaft member due to the force.

  The male portion and the female portion are disposed on one side with respect to the shaft member in the mounting direction, and the first and second retaining portions are formed on the one side with respect to the shaft member from the one side. It is preferable to extend in the opposite side and have a tip on the opposite side, and the receiving part receives the tip of the first and second retaining parts from the removal side.

  According to this configuration, a portion of the first and second retaining portions that is received from the removal side by the receiving portion is from the mounting portion fixed to the fixing portion by the fitting of the male portion and the female portion in the mounting direction Since the distal end portion is the farthest away, when the first and second retaining portions receive a force from the shaft member to the removal side, it is possible to most effectively block the displacement of the removal portion to the removal side.

  The retaining device prevents displacement of the retaining member in a direction away from the fixing portion along the mounting direction in a state where the male portion is fitted to the female portion, and the male portion is configured to receive the female portion. It is preferable to further comprise a detachment prevention part that prevents the detachment of the part.

  According to this configuration, the detachment preventing portion can prevent the male portion from being unintentionally detached from the female portion, and can prevent the unintentional removal of the retaining member from the fixing portion.

  The fixing portion is a guide portion having a guide hole through which the shaft member is inserted, and guides the shaft member so that the shaft member inserted into the guide hole moves along the axial direction. Is preferred.

  According to this configuration, it is possible to guide the shaft member so that the shaft member moves along the axial direction, and to suppress misalignment of the pin at the time of insertion and removal of the pin into and from the pin hole. Since the guide part to guide and the fixing part to which the retaining member is fixed can be used together, the number of members can be reduced.

  The work machine according to the present invention supports the shaft member and the structure that constitutes a predetermined part of the work machine, the retaining device, and the shaft member for inserting and removing the pin into the pin hole. And a base on which the fixing portion of the retaining device and the driving device are installed, and which is attached to the structure.

  According to this work machine, even if the space adjacent to the removal side of the mounting bracket and the winch plate in the work machine is narrow, the retaining member is in a state to prevent the pin from being pulled out of the pin hole The work of attaching the retaining member can be easily performed. Further, in this working machine, since the shaft member can be moved forward and backward by the drive device and the pin can be inserted into and removed from the pin hole, the labor involved in the work of inserting and removing the pin into the pin hole can be reduced. In addition, it is difficult to assemble the fixing part of the retaining device and the drive device to the structure while adjusting the position of each other in the narrow space adjacent to the hole side of the pin in the working machine. In the work machine, the fixed part of the retaining device and the drive are installed on the base, and the base is attached to the structure, so the fixed part and the drive are mounted on the base in a wide place away from the space. After adjusting the positions of each other and installing the base, the fixing portion and the drive unit in one united space, the base is attached to the structure, and the fixing portion and the drive of the structure of the working machine are installed. The device can be assembled and there is no need to perform difficult assembly operations in the narrow space. Therefore, in this work machine, the work of assembling the fixing portion and the drive device to the structure can be facilitated.

  The work machine according to the present invention is a winch mounted on the frame, the frame of the work machine, a mounting bracket installed on the frame, and a winch mounted on the frame. A winch plate for supporting the winch drum so that the winch drum can be rotated about its central axis, and a shaft member including a connection pin for connecting the frame and the winch, The mounting bracket is provided with a first pin hole, and the winch plate is provided with a second pin hole, and the connection pin is inserted into the first pin hole and the second pin hole to be mounted in the mounting bracket. And the winch plate, and the fixing portion is the first pin hole and the second pin with respect to the mounting bracket and the winch plate. Is disposed at a position on the withdrawal side of the connection pin and fixed to the frame, and the retaining member is attached to the fixing portion, the connection pin being in the first pin hole and the second pin hole The movement of the shaft member to the removal side in the inserted state is blocked.

  According to this work machine, it is possible to prevent the connection pin connecting the mounting bracket installed on the frame of the work machine and the winch plate from coming out of the first pin hole of the mounting bracket and the second pin hole of the winch plate. Then, even if the space adjacent to the removal side of the mounting bracket and the winch plate in this working machine is narrow, the retaining member prevents the connection pin from being removed from the first and second pin holes. Thus, the work of attaching the retaining member can be easily performed.

  As described above, according to the present invention, even if the space adjacent to the hole member on the withdrawal side of the pin from the pin hole is narrow, the retaining member is in a state to prevent the pin from coming off. It is possible to provide a retaining device capable of easily performing an operation of attaching the retaining member and a working machine provided with the same.

1 is a side view of a crane to which a retaining device according to an embodiment of the present invention is applied. It is the figure which looked at the retainer of this embodiment in the crane shown by FIG. 1, and its periphery from the back. It is a perspective view of the fixing | fixed part in the state which removed the securing member in the crane, and the periphery of an axial member. It is a perspective view of the securing member of the securing device by one embodiment of the present invention. It is sectional drawing along the VV line | wire in FIG. FIG. 7 is a perspective view of the vicinity of the retaining device, the fixing portion, and the shaft member in a state in which the retaining member is installed in the crane. It is the perspective view which looked at the removal prevention apparatus in the state in which the removal prevention member was installed in the crane, the fixing | fixed part, and the periphery of a shaft member from the angle different from FIG. It is a perspective view which shows the structure of the securing member by one modification of this invention, a receiving part, and a clamping part. It is a perspective view of the retaining member by another modification of this invention. It is a perspective view which shows the structure of the retaining member, fixing | fixed part, and receiving part by another modification of this invention. It is the figure which looked at the retaining device by another modification of this invention, and its periphery along the axial direction of a connecting pin toward the insertion side of the connecting pin. It is the figure which looked at the retaining device shown in FIG. 11 and its periphery from upper direction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows the overall configuration of a crane to which the retaining device 1 according to one embodiment of the present invention is applied, and FIG. 2 shows the retaining of this embodiment in the crane shown in FIG. The configuration of the device 1 and its periphery are shown.

  As shown in FIGS. 1 and 2, the retaining device 1 according to the present embodiment includes the winch plate 113 of the winch 105 mounted on the swing frame 103 of the upper swing body 102 of the crane 100 and the mounting bracket 107 of the swing frame 103. To prevent the connection pin 121 from coming out. Crane 100 is an example of a working machine in the present invention, and connection pin 121 is an example of a pin in the present invention. Hereinafter, the configuration of the crane 100 will be described first.

  As shown in FIG. 1, the crane 100 includes a lower main body 101 and an upper swing body 102 mounted on the lower main body 101 so as to be pivotable about a vertical axis.

  The upper slewing body 102 is pivotally mounted on the lower main body 101 and installed on a swing frame 103 serving as a base of the upper swing body 102, a winch 105 mounted on the swing frame 103, and the swing frame 103 And a mounting bracket 107.

  The swing frame 103 is an example of the structure of the working machine in the present invention, and is an example of the frame of the working machine in the present invention. As shown in FIG. 2, the pivot frame 103 has a frame body 106 on which the winch 105 is installed, and a plurality of base blocks 108 provided on the frame body 106.

  The mounting bracket 107 is an example of the hole member in the present invention. The mounting bracket 107 has a base 109 fixed to the upper surface of the frame main body 106 and a pair of plate-like standing portions 110 provided to project upward from the base 109. The pair of upright portions 110 are arranged with a gap therebetween in the width direction of the turning frame 103. The width direction of the swing frame 103 is a direction orthogonal to both the direction in which the central axis of the swing of the swing frame 103 with respect to the lower main body 101 extends and the front-rear direction of the upper swing body 102. Each standing portion 110 is disposed such that the thickness direction thereof coincides with the width direction of the turning frame 103. Each standing portion 110 has a pin hole 110 a penetrating the standing portion 110 in the plate thickness direction. The pin hole 110a is an example of the first pin hole in the present invention.

  The plurality of base blocks 108 are provided in an area on the inner side in the width direction of the pivot frame 103 than the mounting bracket 107, and in the area, the base blocks 108 are spaced apart. Each base block 108 is mounted on the upper surface of the frame main body 106 by being welded to the upper surface of the frame main body 106. Each base block 108 has a bolt hole (not shown) penetrating vertically through the base block 108.

  The winch 105 is, for example, a winding winch for winding / unwinding a hoisting rope to wind a hoisting member such as a boom or the like, and a hook device for winding / unwinding a hanging rope to wind up / off a hanging load suspended thereon. It is a winch etc. which lowers. FIG. 1 shows a winch 105 as a hoisting winch for hoisting the boom. The winch 105, as shown in FIG. 2, includes a winch drum 112 for winding a rope, and a winch plate 113 supporting the winch drum 112 such that the winch drum 112 can rotate around its central axis. Have.

  The winch drum 112 is disposed such that its central axis extends in the width direction of the pivot frame 103. Also, the winch drum 112 has a shaft 112a at the end of the winch drum 112 in the direction in which its central axis extends.

  The winch plate 113 supports the shaft 112 a of the winch drum 112 through the bearing 114. The winch plate 113 has a flat plate shape, and is disposed so that the thickness direction thereof coincides with the direction in which the central axis of the winch drum 112 extends and the width direction of the turning frame 103. At a portion near the lower end of the winch plate 113, a pin hole 113a penetrating the winch plate 113 in the plate thickness direction is provided. The winch plate 113 is an example of the hole member in the present invention, and the pin hole 113a is an example of the second pin hole in the present invention. A portion near the lower end of the winch plate 113 is inserted between the pair of standing portions 110 of the mounting bracket 107.

  The upper swing body 102 of the crane 100 further includes a connecting device 120 for connecting the winch plate 113 and the mounting bracket 107 of the swing frame 103. The connecting device 120 is provided on the swing frame 103. The coupling device 120 includes a shaft member 124 including the coupling pin 121, a driving device 126, and a base 128. The connecting device 120 connects the winch plate 113 and the mounting bracket 107 of the turning frame 103 by inserting the connecting pin 121 into the pin holes 110a and 113a.

  The shaft member 124 includes a connecting pin 121 and a rod 122, and is a member that moves forward and backward in the width direction of the turning frame 103 in order to insert and remove the connecting pin 121 into the pin holes 110a and 113a.

  The connection pin 121 has a central axis linearly extending in a certain direction, and is inserted into and withdrawn from the pin holes 110a and 113a along the direction in which the central axis extends. Hereinafter, the direction in which the central axis of the connection pin 121 extends is referred to as the axial direction of the connection pin 121. The connecting pin 121 has a substantially cylindrical pin main body 131 and a disc-like collar portion 132 larger in diameter than the pin main body 131.

  The pin main body 131 of the connection pin 121 is inserted into the pin holes 110a and 113a. The pin main body 131 has one end, which is an end on the insertion side of the pin main body 131 into the pin holes 110a and 113a, and another end, which is an end of the pin main body 131 from the pin holes 110a and 113a. And an end. The one end of the pin main body 131 is the tip of the connecting pin 121.

  The collar portion 132 is provided at the other end of the pin main body 131 so as to be coaxial with the pin main body 131. A base end portion of the connection pin 121 is configured by the flange portion 132. The collar portion 132 has an extraction side surface 132a facing the extraction side of the connection pin 121 from the pin holes 110a and 113a. The extraction side surface 132 a is an end surface of the collar portion 132 on the removal side.

  The axial direction of the connecting pin 121 coincides with the direction in which the central axis of the winch drum 112 extends and the width direction of the turning frame 103, and the tip of the connecting pin 121 faces outward in the width direction of the turning frame 103 and its base end It is arrange | positioned in the attitude | position which faces the width direction inner side of the turning frame 103. As shown in FIG.

  The rod 122 is a cylindrical member, and is connected to the proximal end of the connection pin 121 so as to be coaxial with the connection pin 121. In other words, the rod 122 is connected to the collar portion 132 of the connection pin 121 so as to be coaxial with the connection pin 121 and extends from the extraction side surface 132 a of the collar portion 132 to the removal side. The rod 122 has an outer diameter smaller than the outer diameter of the collar portion 132. Therefore, at the connection point between the rod 122 and the collar portion 132, a step is formed between the outer peripheral surface of the rod 122 and the outer peripheral surface of the collar portion 132.

  The driving device 126 is a device for advancing and retracting the shaft member 124 in the width direction of the swing frame 103 along its central axis in order to insert and remove the connecting pin 121 in the pin holes 110a and 113a. That is, in this embodiment, instead of manually inserting and removing the connecting pin 121 into and from the pin holes 110a and 113a, the connecting pin 121 is moved to and from the pin hole 110a by moving the shaft member 124 forward and backward. It is designed to be inserted in and removed from 113a. The driving device 126 is a hydraulic cylinder, and has a cylinder body 134, a piston (not shown) provided in the cylinder body 134, and two brackets 136 attached to the outer surface of the cylinder body 134.

  The rod 122 of the shaft member 124 is inserted into the cylinder body 134, and the rod 122 is connected to the piston in the cylinder body 134. The piston is movable in the width direction of the swing frame 103 within the cylinder body 134. In the driving device 126, the piston is moved outward in the width direction of the swing frame 103 by the hydraulic pressure supplied to the cylinder body 134, thereby causing the rod 122 to advance from the cylinder body 134 and inserting the connecting pin 121 into the pin holes 110a and 113a. On the other hand, when the piston is moved inward in the width direction of the swing frame 103 by the hydraulic pressure, the rod 122 is retracted into the cylinder body 134 and the connection pin 121 is removed from the pin holes 110a and 113a.

  The base 128 is a base of the connecting device 120, and the driving device 126 is installed on the base 128. The base 128 is installed on the pivoting frame 103 inside the pivoting frame 103 in the width direction of the mounting bracket 107. The base 128 has a base plate 140 and a plurality of brackets 142.

  The base plate 140 is a flat plate and is mounted on the plurality of base blocks 108 of the revolving frame 103 and is detachably fixed to the base blocks 108. Specifically, insertion holes (not shown) are formed in the base plate 140 at positions corresponding to the bolt holes of the base blocks 108 so as to penetrate the base plate 140 in the thickness direction (vertical direction). The base plate 140 and the base block 108 are fastened by inserting a bolt (not shown) into each insertion hole and screwing it into the corresponding bolt hole of the base block 108. Therefore, it is possible to separate the base plate 140 from the base block 108 by loosening the bolt and removing the bolt from the bolt hole and the insertion hole.

  The plurality of brackets 142 are attached to the top surface of the base plate 140. Each bracket 136 of the drive 126 is pinned to each bracket 142 such that the drive 126 is attached to the base 128.

  The retaining device 1 according to the present embodiment is provided on the upper revolving unit 102 of the crane 100 having the above-described configuration, and prevents an unintentional removal of the connecting pin 121 from the pin holes 110a and 113a. For example, a force that causes the rod 122 to retract into the cylinder body 134 may be generated unintentionally due to various factors such as an erroneous operation of the drive device 126 or a drop in hydraulic pressure from the cylinder body 134. In such a case In addition, the retaining device 1 blocks the movement of the shaft member 124 toward the removal side to prevent the connection pin 121 from being removed from the pin holes 110a and 113a. The retaining device 1 has a fixing portion 2, a retaining member 4, a receiving portion 6 and a detachment preventing portion 8.

  The fixing portion 2 is disposed at a position on the removal side of the connection pin 121 with respect to the mounting bracket 107, and is fixed to the swing frame 103 of the upper swing body 102. The fixing portion 2 is a member to which the retaining member 4 is attached, and in the present embodiment, the fixing portion 2 guides the shaft member 124 so that the shaft member 124 moves along the axial direction. It is also a guide section.

  Specifically, the fixing portion 2 is fixed on the base plate 140. That is, the fixing unit 2 is fixed to the swing frame 103 via the base plate 140. The fixing portion 2 is a position between the mounting bracket 107 and the driving device 126 on the base plate 140, that is, a position separated from the mounting bracket 107 toward the removal side and from the driving device 126 toward the insertion side. Provided in The fixing portion 2 is provided upright on the upper surface of the base plate 140.

  As described later, the receiving portion 6 is also provided on the base plate 140, and the fixing portion 2, the receiving portion 6 and the connecting device 120 provided on the base plate 140 are unitized. That is, in the present embodiment, the driving device 126 of the coupling device 120, the fixing portion 2 and the receiving portion 6 are installed on the base plate 140 and are unitized, and the entire unit is mounted on the swing frame 103 The base plate 140 is fastened to the base block 108 as shown in FIG. Further, the entire unit can be removed from the swing frame 103 by releasing the fastening between the base block 108 and the base plate 140.

  As shown in FIG. 3, the fixing portion 2 has a fixing portion main body 12 erected on the base plate 140 and a male portion 13 projecting from the fixing portion main body 12.

  The fixing portion main body 12 has a guide hole 12 a (see FIG. 2) which penetrates the fixing portion main body 12 in the width direction of the turning frame 103. The guide holes 12a are round holes disposed coaxially with the pin holes 110a and 113a. The pin main body 131 of the connection pin 121 of the shaft member 124 is inserted into the guide hole 12a, and the fixing portion 2 is inserted into the guide hole 12a when the drive device 126 moves the shaft member 124 back and forth. The connecting pin 121 is guided such that the pin body 131 moves in the axial direction. Thereby, the fixing portion 2 functions as a guide portion for guiding the connecting pin 121 (shaft member 124), and when the connecting pin 121 is inserted into and removed from the pin holes 110a and 113a, the fixing portion 2 is inclined or misaligned. It is suppressed that the insertion and removal of the connection pin 121 with respect to the pin hole 110a, 113a is inhibited.

  The male portion 13 is a substantially cylindrical protrusion extending from the fixing portion main body 12 in a mounting direction described later orthogonal to the central axis of the connection pin 121 (the central axis of the shaft member 124). In the present embodiment, the male portion 13 extends upward from the upper end of the fixing portion main body 12. FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 2, and shows the positional relationship of the male portion 13 with respect to the shaft member 124. In addition, illustration of the detachment prevention part 8 is abbreviate | omitted in FIG. As shown in FIG. 5, when viewed from the axial direction of the connecting pin 121, the male portion 13 has a direction D orthogonal to both the axial direction of the connecting pin 121 and the mounting direction described later (this embodiment In the embodiment, it is disposed within the range of the width W (the width W of the flange portion 132 of the connection pin 121) of the shaft member 124 in the horizontal direction and in the front-rear direction of the upper swing body 102). Further, the male portion 13 is disposed such that the center of the width of the male portion 13 in the direction D is substantially the same as the center of the width of the male portion 13 in the direction D.

  The retaining member 4 is attached to the fixing portion 2 as shown in FIGS. 2 and 6, and the connecting pin 121 is inserted into the pin holes 110a and 113a to the removal side of the shaft member 124. It prevents movement. The retaining member 4 is detachably attached to the fixed portion 2 and the shaft member 124. The retaining member 4 has a mounting portion 23 and a retaining portion 25.

  The attaching portion 23 is configured to be attachable to the fixing portion 2 by approaching the fixing portion 2 along an attaching direction orthogonal to the central axis of the connection pin 121. The mounting portion 23 has a flat plate shape, and when the retaining member 4 is mounted on the fixing portion 2 and the shaft member 124, the thickness direction thereof coincides with the mounting direction (vertical direction in this embodiment) and the shaft member It is arranged to be adjacent to the collar portion 132 on the opposite side of the frame body 106 (the upper side of the shaft member 124 in this embodiment) with respect to 124. The mounting portion 23 extends in the width direction of the swing frame 103.

  The mounting portion 23 is a female portion 22 capable of receiving the male portion 13 along the mounting direction, and prevents the retaining member 4 from being removed in the axial direction by fitting with the received male portion 13. Have something to restrain in position. With respect to the retaining position, the rod 122 of the shaft member 124 enters into the opening 28 described later of the retaining member 4 and the retaining portion 25 abuts against the extraction side surface 132 a to the removal side of the shaft member 124. It is a position that prevents movement.

  The female portion 22 is a portion of the attachment portion 23 near the end on the insertion side. The female portion 22 has a fitting hole 26 (see FIG. 4) in which the male portion 13 is fitted in the mounting direction. The female portion 22 engages with the male portion 13 received in the fitting hole 26. The fitting hole 26 penetrates the attachment portion 23 (female portion 22) in the plate thickness direction. The fitting hole 26 is a round hole corresponding to the shape of the male portion 13 and has an inner diameter slightly larger than the outer diameter of the cylindrical male portion 13. The female portion 22 (mounting portion 23) has a dimension (plate thickness) smaller than the length of the male portion 13 in the mounting direction, and when the male portion 13 is inserted into the fitting hole 26, The vicinity of the tip end portion protrudes from the female portion 22.

  The female portion 22 is configured to maintain engagement with the male portion 13 against the force even when the retaining member 4 receives the force from the shaft member 124 toward the removal side. . That is, the female portion 22 has a portion located on the insertion side with respect to the male portion 13 inserted into the fitting hole 26, and this portion hits the surface of the male portion 13 facing the insertion side. This counteracts the force on the withdrawal side received by the detachment prevention member 4 to block the displacement of the detachment prevention member 4 on the withdrawal side and prevent the female part 22 from coming off the male part 13.

  The retaining portion 25 (see FIG. 4) is a portion that abuts on the connection pin 121 and blocks the movement of the connection pin 121 toward the removal side, in other words, the movement of the shaft member 124 toward the removal side.

  Specifically, the retaining portion 25 has a first retaining portion 25a and a second retaining portion 25b. The first and second retaining portions 25 a and 25 b are connected to the end of the mounting portion 23 opposite to the female portion 22 and extend perpendicularly to the mounting portion 23. The first and second retaining portions 25a, 25b are connected near the end on the mounting portion 23 side, and extend from near the end to the opposite end. The first retaining portion 25a and the second retaining portion 25b are located on both sides of the opening 28 which can receive the rod 122 of the shaft member 124 in the mounting direction. The first retaining portion 25a and the second retaining portion 25b are configured to be symmetrical to each other with respect to a center line between them, and have equal lengths.

  The first and second retaining portions 25a, 25b are in a state where the retaining member 4 is disposed in the retaining position as shown in FIGS. 2 and 6, that is, in a state of being attached to the fixed portion 2 and the shaft member 124. , And disposed on the withdrawal side of the collar portion 132 of the connection pin 121. In this state, the rod 122 of the shaft member 124 enters into the opening 28 and the first and second retaining portions 25a, 25b abut against the extraction side surface 132a of the collar portion 132 so that the shaft member 124 is removed. It is possible to prevent movement to the side.

  In the present embodiment, in the state where the shaft member 124 is advanced to the insertion side until the flange portion 132 of the connection pin 121 abuts on the fixing portion 2, the extraction side surface 132a and the retaining portions 25a and 25b and There is a slight gap between them. Then, when the shaft member 124 is slightly displaced to the removal side so as to eliminate the gap, the retaining portions 25a and 25b abut on the extraction side surface 132a. Further, in a state where the retaining member 4 is attached to the fixing portion 2 and the shaft member 124, the first and second retaining portions 25a, 25b are the male portion 13 and the female portion relative to the shaft member 124 in the mounting direction. 22 (attachment part 23) is extended from the one side arrange | positioned to the other side. Then, in this state, the first and second retaining portions 25a, 25b have tip portions (lower end portions in the present embodiment) on the side opposite to the side where the male portion 13 and the mounting portion 23 are disposed with respect to the shaft member 124. ).

  The opening 28 has a groove shape extending in the same direction as the penetration direction of the fitting hole 26 of the female portion 22 from the tip (lower end) of the first and second retaining portions 25a and 25b to the mounting portion 23 side. The end of the opening 28 on the distal end side of the retaining portions 25a, 25b is open, and the rod 122 can be received in the opening 28 from the end. The width of the opening 28 is slightly larger than the outer diameter of the rod 122, and the rod 122 enters into the opening 28, and the rod 122 comes off with the first and second retaining portions 25a and 25b straddling the rod 122. The stop portions 25a, 25b have a width such that large rattling does not occur in the direction perpendicular to both the axial direction and the mounting direction with respect to the rod 122.

  The receiving portion 6 (see FIG. 2) is a horizontally long plate erected on the base plate 140. That is, the receiving portion 6 is fixed to the swing frame 103 via the base plate 140. The receiving portion 6 is configured to prevent the first and second retaining portions 25a, 25b disposed on both sides of the rod 122 of the shaft member 124 from being displaced to the removal side. Both the parts 25a and 25b are received from the removal side. Specifically, the receiving portion 6 receives from both ends of the first and second retaining portions 25a and 25b (in the present embodiment, the lower end) from the removal side. The receiving portion 6 is disposed on the side opposite to the male portion 13 with respect to the shaft member 124 in the mounting direction, and is spaced apart from the fixing portion main body 12 toward the removal side. The removal portion 6 is fixed to the upper surface of the base plate 140 by welding or the like. When the first and second retaining portions 25a, 25b receive a force from the shaft member 124 to the removal side, the removal portion 6 holds the first and second retaining portions 25a, 25b, and those The displacement and deformation to the exit side are suppressed.

  The separation preventing portion 8 is for preventing the male portion 13 inserted into the fitting hole 26 of the female portion 22 of the retaining member 4 from being separated from the fitting hole 26. The detachment preventing portion 8 has a retaining pin 30, a detachment preventing portion base 32, and a retaining ring 34.

  The detachment preventing portion base 32 is a plate-like block body, and the retaining pin 30 and the retaining ring 34 are attached to the detachment preventing portion base 32. The retaining pin 30 has a straight rod shape, and a proximal end which is one end thereof is fixed to the detachment preventing portion base 32 and extends so that the retaining pin 30 protrudes from the detachment preventing portion base 32. The retaining ring 34 is attached to the detachment preventing portion base 32 so as to be rotatable around an axis extending in a direction (direction perpendicular to the paper surface of FIG. 2) orthogonal to the extending direction of the retaining pin 30.

  When the male part 13 is inserted into the fitting hole 26, a pin hole (not shown) penetrating the part in the radial direction of the male part 13 is provided at the part projecting from the female part 22. The retaining pin 30 is inserted from the distal end opposite to the proximal end. The retaining pin 30 is insertable into and removable from this pin hole.

  When inserting the male part 13 into the fitting hole 26, insert the retaining pin 30 in the pin hole without inserting it, and after inserting the male part 13 into the fitting hole 26, remove it from the pin hole The locking pin 30 is fitted. In that state, the tip end of the retaining pin 30 projects from the pin hole to one side in the radial direction of the male portion 13, and the base end of the retaining pin 30 and the detachment preventing portion base 32 It protrudes to the opposite side. The retaining pin 30 and the detachment preventing portion base 32 prevent the female portion 22 from being displaced away from the fixing portion main body 12 in the mounting direction, and the detachment of the male portion 13 from the fitting hole 26 is prevented. It is blocked.

  The retaining ring 34 prevents the retaining pin 30 from coming out of the pin hole. When the retaining ring 30 is inserted into the pin hole, the retaining ring 34 is inverted to the opposite side to the tip of the retaining pin 30, and the retaining pin 30 is inserted into the pin hole. Thereafter, it is pivoted around the axis to a position beyond the tip of the retaining pin 30 as shown in FIG. In this state, the retaining ring 34 is prevented from coming out of the pin hole by being caught on the male portion 13 when a force in the direction in which the retaining pin 30 is pulled out of the pin hole acts on the detachment preventing portion 8 It prevents the removal of the pin 30.

  Next, a procedure for attaching the winch 105 to the turning frame 103 in the present embodiment and a procedure for retaining the connecting pin 121 by the retaining device 1 will be described.

  When attaching the winch 105 to the pivoting frame 103, the lower end of the winch plate 113 is inserted from above between the pair of erected portions 110 of the mounting bracket 107 of the pivoting frame 103, and then the rod 122 is pivoted to the drive device 126 The pin main body 131 of the connecting pin 121 is inserted into the pin hole 110 a of the standing portion 110 and the pin hole 113 a of the winch plate 113 by advancing to the width direction outer side 103. Thereby, the winch plate 113 and the mounting bracket 107 are connected by the connection pin 121, and the winch 105 is mounted to the turning frame 103.

  In this state, in order to prevent the connection pin 121 from unintentionally coming out of the pin holes 110a and 113a, the connection pin 121 is prevented from falling off by the detachment prevention device 1 of the present embodiment.

  Specifically, the retaining member 4 is made to approach the fixed portion 2 and the shaft member 124 in the mounting direction. In the present embodiment, the retaining member 4 is lowered from above the fixed portion 2 and the shaft member 124 to approach the fixed portion 2 and the shaft member 124. Thereby, the male portion 13 of the fixed portion 2 is inserted into the fitting hole 26 of the retaining member 4 along the mounting direction, and the female portion 22 of the retaining member 4 and the male portion 13 of the stationary portion 2 are While being fitted, the rod 122 of the shaft member 124 is inserted into the opening 28 of the retaining member 4 along the mounting direction. At this time, tip end portions (lower end portions) of the first and second retaining portions 25 a and 25 b are disposed on the insertion side with respect to the receiving portion 6 and contact the insertion side surface of the receiving portion 6. As described above, the retaining member 4 is attached to the fixing portion 2 and the shaft member 124.

  Thereafter, the retaining pin 30 is inserted into a pin hole (not shown) provided on the outer peripheral surface of the male portion 13, and the retaining ring 34 is hooked on the retaining pin 30. Thereby, the male portion 13 is prevented from being unintentionally disengaged from the fitting hole 26 of the retaining member 4 in the mounting direction.

  As described above, the retaining member 4 is attached to the fixing portion 2 and the shaft member 124 as shown in FIGS. 6 and 7, and the retaining member 4 causes the shaft member 124 to move toward the removal side. This is blocked to prevent the connection pin 121 from coming out of the pin holes 110a and 113a.

  In the retaining device 1 of the present embodiment, the male portion 13 of the fixing portion 2 fixed to the swing frame 103 of the crane 100 extends along the mounting direction of the mounting portion 23 of the retaining member 4 with respect to the fixing portion 2 The female portion 22 of the mounting portion 23 of the retaining member 4 receives the male portion 13 along the mounting direction and engages with the male portion 13 to restrain the retaining member 4 in the retaining position, and The first and second retaining portions 25a, 25b of the retaining member 4 are located on both sides of the opening 28 which can receive the rod 122 of the shaft member 124 along the mounting direction. Therefore, the male part 13 and the female part 22 are fitted to each other only by the operation of bringing the retaining member 4 close to the fixing part 2 along the mounting direction, and the attaching part 23 of the retaining member 4 is fixed to the fixing part 2. The rod 122 of the shaft member 124 can be inserted into the opening 28 of the retaining member 4 so that the first and second retaining portions 25a, 25b abut against the withdrawal side surface 132a of the shaft member 124. The retaining member 4 can be disposed at a position, and the retaining member 4 can be restrained at that position. For this reason, even if the space adjacent to the mounting bracket 107 is narrow on the withdrawal side of the connection pin 121, the mounting operation of the retaining member 4 such as bolting may not be performed in such a narrow space. The attachment work of the retaining member 4 to the mounting can be easily implemented.

  Moreover, in the detachment prevention device 1 of the present embodiment, the attachment portion 23 of the detachment prevention member 4 is attached to the fixed portion 2 by the fitting of the male portion 13 and the female portion 22, and the first of the detachment prevention member 4 And, since the second retaining portions 25a, 25b are arranged to sandwich the rod 122 of the shaft member 124 from both sides, for example, external force in the rotational direction around the central axis of the male portion 13 is the retaining member 4 Even when it acts, the first retaining portion 25a or the second retaining portion 25b can abut against the rod 122 and can resist the external force, and the retaining member 4 is rotated to move from the shaft member 124. You can prevent it from coming off. Therefore, in the retaining device 1 of the present embodiment, the retaining member 4 can be stably installed.

  Further, in the retaining device 1 of the present embodiment, since the first and second retaining portions 25a, 25b of the retaining member 4 are pressed from the removal side by the receiving portion 6, the first and second retaining portions Even when 25a and 25b receive a force from the shaft member 124 toward the removal side, displacement or deformation of the first and second retaining portions 25a and 25b to the removal side can be suppressed. Therefore, it is possible to further improve the reliability of the retaining of the connection pin 121 by the retaining member 4 and to prevent the retaining member 4 from the fixing portion 2 and the shaft member 124 by the force the retaining member 4 receives from the shaft member 124. Unintended detachment or damage to the retaining member 4 can be suppressed.

  Further, in the retaining device 1 of the present embodiment, from the fitting hole 26 by the detachment preventing portion 8 in a state where the female portion 22 of the retaining member 4 is fitted with the male portion 13 inserted into the fitting hole 26. It is possible to prevent the male portion 13 from unintentionally leaving. For this reason, the stability of the fixation of the retaining member 4 to the fixing portion 2 can be improved.

  Further, in the retaining device 1 of the present embodiment, the fixing portion 2 is a guide portion for guiding the shaft member 124 so that the shaft member 124 inserted into the guide hole 12a moves along the axial direction. Therefore, while being able to suppress that the connection pin 121 shifts in position at the time of insertion / extraction of the connection pin 121 to pin hole 110a, 113a, since the fixing | fixed part 2 and the guide part for fixing the securing member 4 can be used, it is a member You can reduce the score.

  Further, in the retaining device 1 of the present embodiment, the male portion 13 of the fixed portion 2 and the fitting hole 26 of the retaining member 4 are both in the axial direction and in the mounting direction when viewed from the axial direction. It is disposed within the width of the shaft member 124 in the vertical direction. For this reason, it is possible to suppress large deviations between the positions of the male portion 13 and the fitting hole 26 and the positions of the first and second retaining portions 25a and 25b in the vertical direction. For this reason, when a force directed from the shaft member 124 toward the withdrawal side along the axial direction is applied to the first and second retaining portions 25a, 25b, a rotational direction about the male portion 13 is obtained. The force component can be prevented from acting on the first and second retaining portions 25a and 25b, and deformation of the first and second retaining portions 25a and 25b can be prevented.

  Further, in the crane 100 of the present embodiment, since the shaft member 124 can be moved forward and backward by the drive device 126 and the connecting pin 121 can be inserted into and removed from the pin holes 110a and 113a, the connecting pin 121 can be inserted into and removed from the pin holes 110a and 113a. It is possible to reduce the work effort.

  Further, in the crane 100, the fixing portion 2, the receiving portion 6, and the drive device 126 are assembled to the turning frame 103 while adjusting their positions in a narrow space adjacent to the mounting bracket 107 on the withdrawal side of the connection pin 121. It is difficult. However, in the crane 100 of the present embodiment, since the fixed portion 2 and the driving device 126 are installed on the base 128 and the base 128 is attached to the turning frame 103, the base 100 is mounted on the base 128 at a large place away from the space. After the fixing portion 2, the receiving portion 6 and the driving device 126 are installed while adjusting their positions, the one where the base 128, the fixing portion 2, the receiving portion 6 and the driving device 126 are integrated is disposed in the space By attaching the base 128 to the swing frame 103, the fixed portion 2, the receiving portion 6 and the drive device 126 can be assembled to the swing frame 103, and it is not necessary to perform a difficult assembling operation in the narrow space. Therefore, in the crane 100 of this embodiment, the attachment operation | work of the fixing | fixed part 2, the receiving part 6, and the drive device 126 to the turning frame 103 can be facilitated.

  The retaining device and the working machine according to the present invention are not necessarily limited to those having the above-mentioned configuration. For example, the following configurations can be adopted for the retaining device and the working machine according to the present invention.

  The shapes of the first and second retaining portions are not necessarily limited to the shapes shown in the above embodiment. For example, as shown in FIG. 8, one of the first and second retaining portions 25a, 25b is shorter than the other, and the inner edge of the retaining portions 25a, 25b is J-shaped. It is also good. Also, as shown in FIG. 9, the first and second retaining portions 25a, 25b are shaped such that the distance between them gradually increases toward the distal end side thereof, The inner edge forming the opening may be V-shaped.

  Further, the receiving portion may receive only one of the first and second retaining portions from the removal side. In the modification of FIG. 8, the receiving part 6 of such a structure is employ | adopted.

  In the configuration in which the receiving portion receives only one of the first and second retaining portions from the removal side, the retaining device holds the one retaining portion received by the receiving portion between the receiving portion and the receiving portion. May be further provided. Such a configuration is employed in the modification of FIG.

  In the modification, the sandwiching portion 42 is disposed on the insertion side of the connection pin 121 (not shown in FIG. 8) from the receiving portion 6 with a gap allowing insertion of the tip of the first retaining portion 25a. It is fixed on 140. When the retaining member 4 is attached to the fixed portion 2 and the shaft member 124 in the same manner as in the above embodiment, the tip of the first retaining portion 25a is inserted into the gap between the holding portion 42 and the receiving portion 6 The tip end portion is sandwiched between the sandwiching portion 42 and the receiving portion 6.

  In the case where only one of the first and second retaining portions 25a and 25b is received by the receiving portion 6, the one retaining portion prevents the retaining of the male portion 13 in the direction away from the receiving portion 6. It may be difficult to prevent the rotation of the member 4 in some cases, but by holding the tip of one of the retaining portions 25a between the holding portion 42 and the receiving portion 6 like this configuration, the male portion 13 is centered It is possible to prevent rotation of the retaining member 4 in both directions.

  In addition, the shape of the male portion may be a triangular prism, a quadrangular prism, or a prism having an angle greater than that. In this case, the shape of the fitting hole of the female portion into which the prismatic male portion is inserted may be a square hole shape fitting to the prismatic male portion. According to this configuration, when the male part is inserted into the fitting hole of the female part, the male part and the female part do not rotate relative to each other around the male part, and as a result, the male part is centered The rotation of the retaining member can be effectively suppressed. Therefore, if such a configuration of the fitting holes of the male portion and the female portion is applied to the modified example of FIG. 8, both directions of the retaining member 4 centered on the male portion can be obtained even if the holding portion 42 is not provided. It is possible to prevent pivoting.

  In addition, the fixing portion to which the retaining member is attached may not necessarily be the guide portion for guiding the shaft member. That is, as long as the member is disposed at a position on the withdrawal side of the pin with respect to the hole member provided with the pin hole and fixed to the work machine, the detachment prevention member is used even if it has no function as a guide portion. It can be adopted as a fixing part for mounting.

  In this case, for example, the fixing portion may be provided at a position deviated from the shaft member in the direction orthogonal to both the axial direction of the pin and the mounting direction orthogonal to the axial direction. FIG. 10 shows a modification of such a configuration.

  In the modification of FIG. 10, the fixing portion 2 is disposed on the base plate 140 so as to be disposed to the side of the shaft member (not shown). The first and second retaining portions 25a, 25b of the retaining member 4 are arranged side by side with the fixing portion 2 in a state of being attached to the fixing portion 2 and disposed at the retaining position. The mounting portion 23 of the retaining member 4 extends along the direction in which the first and second retaining portions 25 a and 25 b and the fixing portion 2 are arranged, and the female portion 22 of the mounting portion 23 corresponds to the fixing portion 2. The male part 13 is fitted.

  Further, in the modified example of FIG. 10, the male portion 13 is a square pole, and the fitting hole 26 of the female portion 22 is a square hole fitting the shape of the male portion 13. The shape of the fitting hole 26 between the male portion 13 and the female portion 22 can prevent the rotation of the retaining member 4 around the male portion 13 as described above.

  Further, the mounting direction of the mounting portion of the retaining member with respect to the fixing portion is not necessarily limited to the vertical direction, and may be a horizontal direction or a diagonal direction between the horizontal direction and the vertical direction. In this case, the extending direction of the male portion of the fixing portion and the extending direction of the opening of the retaining member for receiving the shaft member may be set to the same direction as the mounting direction of the mounting portion of the retaining member with respect to the fixing portion. 11 and 12 show a modified example of such a configuration.

  In the modification shown in FIGS. 11 and 12, the mounting direction of the retaining member 4 is a horizontal direction orthogonal to the central axis of the connecting pin 121 (shaft member 124). Therefore, the male portion 13 protrudes from the side surface of the fixing portion main body 12 along the mounting direction of the retaining member 4 and the opening 28 of the retaining member 4 extends along the mounting direction. The first and second retaining portions 25a, 25b of the retaining member 4 are located above and below the opening 28. Further, in this modification, the vertically elongated receiving portion 6 is erected on the base plate 140 at a position opposite to the male portion 13 with respect to the shaft member 124, and the receiving portion 6 The two retaining portions 25 a and 25 b can be received from the withdrawal side of the connection pin 121.

  In the embodiment, the male part is provided in the fixing part, and the female part (fitting hole) fitted with the male part is provided in the retaining member, but the male part and the female part (fitting The object on which the hole is provided may be reversed. That is, the male part may be provided on the retaining member and the female part may be provided on the fixing part. In this case, the fitting hole of the female portion provided in the fixing portion is a hole recessed from the outer surface of the female portion (fixing portion) in the mounting direction, and the male portion provided in the retaining member is the mounting It may be a protrusion that protrudes in the direction.

  Further, the withdrawal side surface of the shaft member with which the retaining portion of the present invention abuts is not necessarily limited to the end surface facing the withdrawal side of the hook portion of the pin. For example, circumferential grooves or steps recessed in the radial direction are formed on the outer peripheral surface of the rod of the shaft member or on the outer peripheral surface of the pin, and a surface of the inner surface of the peripheral groove facing the withdrawal side, or The surface facing the withdrawal side may be the withdrawal side surface of the shaft member. Also, the pin may not necessarily have the above-mentioned flange portion, in which case, for example, the extraction side surface where the end face on the extraction side of the generally cylindrical pin abuts against the retaining portion It may be

  Further, the shaft member may not necessarily have a rod connected to the pin, and may be made of a single pin.

  Further, the mounting direction of the mounting portion of the retaining member with respect to the fixing portion is not limited to the direction orthogonal to the central axis of the pin, and may be a direction obliquely intersecting the central axis of the pin.

  In addition, the working machine may not necessarily have a drive for moving the shaft member back and forth to insert and remove the pin into and out of the pin hole.

  Further, the retaining device is not limited to the one applied to retaining the connecting pin for connecting the winch plate to the swing frame of the crane as in the above embodiment. That is, the working machine to which the retaining device of the present invention is applied may be a working machine other than a shovel or other crane.

  Moreover, the pin which the retaining device prevents is not necessarily the connecting pin for connecting the winch plate and the pivot frame, but any pin may be inserted into the pin hole of the hole member provided in the working machine. May be used. For example, when the work machine is a crane, the retaining device may be a retaining pin for connecting a lower spreader of a hoisting device for hoisting a hoisting member such as a boom to the swing frame. .

  In the present invention, the structure of the working machine to which the base on which the fixing portion of the retaining device and the driving device for moving the shaft member forward and backward are installed is attached is not necessarily limited to the swing frame. That is, any structure can be adopted as the structure in the present invention as long as it constitutes a predetermined part of the working machine, and the shaft member is used for inserting and removing the pin into the pin hole of the hole member. It is possible to appropriately select one that can be attached to the base at a position suitable for advancing and retracting movement.

DESCRIPTION OF SYMBOLS 1 Retaining device 2 Fixing portion 4 Retaining member 6 Receiving portion 8 Retaining preventing portion 12a Guide hole 13 Male portion 22 Female portion 25 Retaining portion 25a First retaining portion 25b Second retaining portion 26 Fitting hole 28 Opening 107 Mounting bracket (hole member)
110a Pin hole (first pin hole)
113 Winch plate (hole member)
113a Pin hole (2nd pin hole)
121 connection pin (pin)
124 Shaft member 126 Drive 132a Extracted side surface

Claims (8)

A shaft member including a hole member provided with a pin hole, and a pin having a central axis extending in a certain direction and inserted into the pin hole along the central axis, of the pin from the pin hole A retaining device provided in a working machine comprising a withdrawal side surface facing the withdrawal side, the withdrawal prevention device preventing the withdrawal of the pin from the pin hole,
A fixing portion disposed at the position on the withdrawal side with respect to the hole member and fixed to the work machine;
And a retaining member attached to the fixing portion, for blocking movement of the shaft member to the removal side in a state where the pin is inserted into the pin hole,
The retaining member can be attached to the fixing portion by approaching the fixing portion along a mounting direction intersecting the central axis, and the mounting portion is attached to the fixing portion And a retaining portion for blocking movement of the shaft member to the removal side in the closed state,
One of the fixing portion and the mounting portion has a male portion extending along the mounting direction,
The other of the fixing portion and the attaching portion is a female portion capable of receiving the male portion along the mounting direction, and the retaining member is formed by fitting with the received male portion. One having an axial position which is a direction in which the central axis extends and which is restrained at a retaining position;
The detachment prevention device is a position where the detachment prevention portion is a position that blocks movement of the shaft member toward the detachment side by the abutment of the detachment prevention portion against the extraction side surface. The retaining portion includes a first retaining portion and a second retaining portion located on both sides of an opening capable of receiving the shaft member in the mounting direction,
In the retaining position, the shaft member enters into the opening, and the first and second retaining portions abut against the extraction side surface to prevent the shaft member from moving toward the removal side. The retention device according to claim 1, which is a position.   The receiving part fixed to the work machine, further comprising one for receiving the retaining part from the removal side so as to prevent the retaining part from being displaced to the removal side. Retaining device described in. The male portion and the female portion are disposed on one side with respect to the shaft member in a direction along the mounting direction,
The retaining portion extends from the one side to the side opposite to the one side with respect to the shaft member, and has a tip on the opposite side.
The retaining device according to claim 3, wherein the receiving portion receives the tip end of the retaining portion from the removal side.   In the state where the male portion is fitted to the female portion, the male member is prevented from being displaced away from the fixed portion along the mounting direction so that the male portion is disengaged from the female portion. The detachment prevention device according to any one of claims 1 to 4, further comprising a detachment prevention part that blocks.   The fixing portion is a guide portion having a guide hole through which the shaft member is inserted, and guides the shaft member so that the shaft member inserted into the guide hole moves along the axial direction. A retaining device according to any one of the preceding claims. A working machine,
A structure that constitutes a predetermined part of the work machine;
The retaining device according to any one of claims 1 to 6,
A driving device for supporting the shaft member and advancing and retracting the shaft member along the central axis to insert and remove the pin into the pin hole;
A work machine, comprising: a base on which the fixed part of the retaining device and the drive device are installed and attached to the structure. A working machine,
The retaining device according to any one of claims 1 to 6,
A frame of the work machine;
A mounting bracket installed on the frame;
A winch mounted on the frame, comprising: a winch drum; and a winch plate supporting the winch drum such that the winch drum can rotate about its central axis.
And a shaft member including a connection pin for connecting the frame and the winch,
The mounting bracket is provided with a first pin hole,
The winch plate is provided with a second pin hole.
The connection pin is inserted into the first pin hole and the second pin hole to connect the mounting bracket and the winch plate.
The fixing portion is disposed at a position on the withdrawal side of the connection pin from the first pin hole and the second pin hole with respect to the mounting bracket and the winch plate, and is fixed to the frame.
The retaining member is attached to the fixing portion, and prevents movement of the shaft member to the removal side when the connection pin is inserted into the first pin hole and the second pin hole. Work machine.

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