JP6923014B2 - Work machine connecting device, connecting pin, connecting pin mounting device and disconnection method of connecting pin - Google Patents

Description

The present invention relates to a connecting device for a work machine, a connecting pin, a connecting pin mounting device, and a method for disconnecting the connecting pin.

Conventionally, as a work machine, a crane provided with a lower traveling body, an upper rotating body, and a boom is known. The boom is undulatingly attached to the front of the upper swivel body. Specifically, the boom can be rotated in the undulating direction by connecting the base end portion of the boom and the upper swing body by a connecting pin extending horizontally. Further, the boom has a longitudinal shape extending in a predetermined direction. Therefore, a boom is often formed by connecting a plurality of members (lower boom, intermediate boom, upper boom, etc.) to each other. Such members may also be connected to each other by connecting pins extending in the horizontal direction. As described above, in the work machine, a plurality of members are often connected to each other by connecting pins extending in the horizontal direction.

Patent Document 1 discloses a technique in which a plurality of unit booms constituting a boom are connected by a connecting pin. Each unit boom is composed of four main materials (constituent members) arranged at positions corresponding to the respective corners of a square pillar shape, and auxiliary materials for connecting adjacent main materials. Then, the boom is assembled by placing the two unit booms on the ground and connecting the four main materials to each other by connecting pins.

In this technique, when the unit booms are placed on the ground when the booms are assembled, the two main members of each unit boom are spaced apart in the horizontal boom width direction. Then, when the connecting pin is arranged in the space formed between the two main materials and the connecting pin is urged outward in the width direction of the boom by the hydraulic actuator, the connecting pin becomes each main material. It is inserted into a pin hole formed in the material. As a result, the two unit booms are connected and the boom is assembled. On the other hand, when the boom is disassembled, the connecting pin is pulled out from the pin hole inward in the width direction of the boom and is arranged again between the two main materials. According to such a configuration, the connecting pin does not protrude outward in the width direction of the boom when the boom is assembled and disassembled. Therefore, the boom can be disassembled and assembled even in a relatively narrow space.

JP-A-2009-173424

In the technique described in Patent Document 1, it is necessary to prepare a hydraulic actuator for inserting the connecting pin into the hole. Therefore, the work time and work cost required for the insertion work of the connecting pin increase. In order to solve such a problem, it is conceivable to insert the connecting pin manually. However, in the technique described in Patent Document 1, when the connecting pin is manually inserted, it is necessary for an operator to enter the space between the two main materials and push the connecting pin from the inside into the hole. .. For this reason, there is a problem that the worker needs to enter the space between the main materials for the insertion work of the connecting pin, and there is a concern about safety.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a connecting pin for connecting a plurality of constituent members of a work machine to each other and to provide a connecting pin arranged inside the constituent member. It is an object of the present invention to provide a connecting device for a work machine, a connecting pin, a connecting pin mounting device, and a method for detaching the connecting pin, which can be easily inserted into a hole from the outside of the member.

The connecting device for a working machine according to the present invention is a first component that includes a pair of first connecting portions arranged at intervals in a horizontal first direction and constitutes a part of the working machine. In each of the first connecting portions of the above, a first constituent member having a first hole portion opened along the first direction and the pair of first connecting portions are spaced apart from each other in the first direction. A second component that includes a pair of second connecting portions to be arranged and constitutes a part of the work machine, and the pair of second connecting portions is located at a position that coincides with the first hole portion in the first direction. Is arranged on one end side of at least the pair of first connecting portions of the working machine having a second component having a second hole portion opened along the first direction in the first direction. It is a connecting device of a work machine that connects the first connecting portion of the one and the second connecting portion of the pair of the second connecting portions arranged on one end side in the first direction to each other. A connecting pin is attached to at least one connecting the first constituent member and the second constituent member, and the connecting pin is attached to one end side of the pair of first connecting portions in the first direction. The second hole of the one second connecting portion arranged on the one end side of the first direction of the first hole portion of the one first connecting portion and the pair of second connecting portions arranged. A connecting position at which the connecting pin is simultaneously inserted into the portion and a position at which the connecting pin is detached from the first hole portion of at least the first connecting portion and in the first direction. A connecting pin that can move between the pair of first connecting portions in the above, and the first hole portion and the second hole portion that are adjacent to each other in the first direction. A connecting pin mounting device having a length in the first direction and capable of being sequentially inserted into the first hole and the second hole from the outside of the first connecting portion in the first direction. The connecting pin mounting device is an engaging portion capable of engaging with the connecting pin located at the disconnection position in a state where the connecting pin mounting device is inserted into the first hole portion and the second hole portion. And a connecting pin mounting device having a pressing portion capable of pressing the connecting pin from the connecting position to the disconnecting position along the first direction, and the connecting pin is provided in the first direction. A cylindrical pin body having a length in the first direction that penetrates the first hole and the second hole adjacent to each other, and one end side of the pin body in the first direction. Placed, It has an engaged portion that can be engaged with the engaging portion and includes an engaged portion that includes a pressed surface that can be pressed by the pressing portion from the connecting position to the disengaging position. ..

According to this configuration, the connecting pin slides between the disconnection position located between the pair of first connecting portions and the connecting position inserted into the first hole portion and the second hole portion. The connecting pin mounting device can be inserted into the first hole and the second hole in order from the outside of the first connecting portion, and has an engaging portion that can engage with the connecting pin located at the disconnection position. .. Therefore, the operator can move the connecting pin from the disconnecting position to the connecting position by engaging the connecting pin mounting device with the connecting pin and pulling it. As a result, since the connecting pin does not protrude to the outside of the first component member, the space required for mounting the connecting pin is reduced. Further, the operator does not need to enter the space between the pair of second connecting portions in order to insert the connecting pin into the first hole portion and the second hole portion, and the outside of the first constituent member and the second constituent member. The work of inserting the connecting pin can be easily performed from.

Further, according to this configuration, since the engaged portion is arranged on one end side of the pin main body portion, the connecting pin mounting device can be easily engaged with the connecting pin.

In the above configuration, the connecting pin is fixed to the one end side of the pin body portion in the first direction so as to face the first direction, and has a predetermined thickness along the first direction. In addition, the central portion of the plate portion has a larger maximum dimension in the third direction orthogonal to the first direction and the second direction than the maximum dimension in the second direction orthogonal to the first direction. The connecting pin mounting device has a plate portion as an engaged portion in which a joint opening is opened, and the connecting pin mounting device has a length straddling the first hole portion and the second hole portion in the first direction. A thickness smaller than the maximum dimension of the engagement opening in the second direction, which is arranged at the tip of the instrument body and the tip of the instrument body in the first direction and is orthogonal to the first direction. The engaging portion is connected to the main body of the appliance and engages in the second direction in the thickness direction of the engaging portion and in the width direction orthogonal to the first direction. The base end portion having a width smaller than the maximum dimension of the joint opening and the instrument main body portion are connected to the base end portion on the opposite side of the first direction, and the maximum dimension of the engagement opening in the third direction. The engaging portion having an engaging end portion that is smaller than and has a width that is larger than the maximum dimension of the engaging opening in the second direction and extends bifurcated in the width direction from the base end portion. The connecting pin mounting device has an insertion posture that allows the engaging portion to be inserted into the opening to a position where the engaging end portion passes through the opening, and the engaging end portion. Is engaged with the back surface of the plate portion so that the connecting pin mounting device can change its posture from the engaging posture that can move integrally with the first connecting pin toward the outside in the first direction. Is desirable.

According to this configuration, the operator inserts the engaging portion of the connecting pin mounting device in the insertion posture into the engaging opening of the connecting pin and changes the posture to the engaging posture, thereby connecting the connecting pin mounting device and the connecting pin. Can be easily engaged.

In the above configuration, it is desirable that the connecting pin mounting device has a pair of gripping portions arranged on the side opposite to the engaging portion in the first direction of the device main body portion.

According to this configuration, the operator can insert the engaging portion of the connecting pin mounting device into the engaging opening of the connecting pin while gripping the pair of grip portions.

In the above configuration, it is desirable that the pair of grips are arranged vertically spaced apart from each other in the insertion posture.

According to this configuration, since the pair of gripping portions are arranged at intervals in the vertical direction in the insertion posture, the operator can stably support the connecting pin mounting device.

In the above configuration, it is desirable that the pair of grips are arranged horizontally spaced apart from each other in the engaged posture.

According to this configuration, the operator can easily pull the connecting pin mounting device in the engaging posture in a stable posture.

In the above configuration, the instrument body portion of the connecting pin mounting instrument has a pressing portion capable of pressing the plate portion along the first direction, and the base end portion of the engaging portion is the pressing portion. It is desirable to be connected to.

According to this configuration, the operator pushes the connecting pin from each hole by pressing the connecting pin through the pressing portion in a state where the connecting pin mounting device is engaged with the connecting pin located at the connecting position. It can be easily detached.

In the above configuration, the connecting pin mounting device is arranged so as to be orthogonal to the first direction on the side opposite to the engaging portion in the first direction of the device main body portion, and an impact is applied from the outside. It is desirable to further have an impact-applied portion that allows this.

According to this configuration, when the operator detaches the connecting pin by using the connecting pin mounting device, the operator gives an impact to the connecting pin via the connecting pin mounting device by giving an impact to the impacted portion. Can be done. As a result, even if there is resistance between the first hole or the second hole and the connecting pin, the connecting pin can be easily detached.

Further, the connecting pin according to the present invention is a first component member including a pair of first connecting portions arranged at intervals in a horizontal first direction and forming a part of a working machine, and the pair of connecting pins. Each of the first connecting portions is arranged at a distance from each other in the first direction between the first component member having a first hole portion opened along the first direction and the pair of first connecting portions. A second component that includes a pair of second connecting portions and constitutes a part of the work machine, and the pair of second connecting portions are positioned at positions that match the first hole portion in the first direction. A connecting pin of a work machine for connecting a second component member having a second hole portion opened along the first direction and a first hole portion adjacent to each other in the first direction. A cylindrical pin body portion having a length in the first direction that penetrates the second hole portion and the connecting pin are arranged at least on one end side of the pair of first connecting portions in the first direction. The connecting pin is the one from the position where the first connecting portion is detached from the first hole portion and the connection is released between the pair of the first connecting portions in the first direction. At the same time, it is inserted into the first hole portion of the first connecting portion and the second hole portion of one of the pair of second connecting portions arranged on the one end side in the first direction. The plate portion has a first hole portion and a plate portion that engages with a predetermined connecting pin mounting device inserted into the second hole portion in order to move to the connecting position which is the position where the plate portion is formed. The pin body is fixed to one end of the pin body in the first direction so as to face the first direction so that it can be pressed from the connecting position to the disconnecting position by the connecting pin mounting device. An engaging opening having a predetermined thickness along the first direction and capable of receiving a part of the connecting pin mounting device at the center of the plate portion, which is orthogonal to the first direction. An engagement opening having a larger maximum dimension in the first direction and a third direction orthogonal to the second direction than the maximum dimension in the second direction is opened.

According to this configuration, the connecting pin moves between the disconnecting position located between the pair of first connecting portions and the connecting position inserted into the first hole portion and the second hole portion. Then, the connecting pin has an engaged portion that can be engaged with the connecting pin mounting device. Therefore, the operator can move the connecting pin from the disconnecting position to the connecting position by engaging the connecting pin mounting device with the connecting pin and pulling it. As a result, since the connecting pin does not protrude to the outside of the first component member, the space required for mounting the connecting pin is reduced. Further, the operator does not need to enter the space between the pair of second connecting portions in order to insert the connecting pin into the first hole portion and the second hole portion, and the outside of the first constituent member and the second constituent member. The work of inserting the connecting pin can be easily performed from.

Further, according to this configuration, the operator can easily engage the connecting pin mounting device and the connecting pin by inserting the connecting pin mounting device into the engaging opening of the connecting pin.

Further, the connecting pin mounting device according to the present invention is a first component member including a pair of first connecting portions arranged at intervals in a horizontal first direction and forming a part of a working machine. Each of the pair of first connecting portions has a first hole portion opened along the first direction, and the pair of first connecting portions are spaced from each other in the first direction. It is a second component that includes a pair of second connecting portions arranged therein and constitutes a part of the working machine, and the pair of second connecting portions coincides with the first hole portion in the first direction. A connecting pin mounting device that mounts a connecting pin that connects a second component member having a second hole portion opened at a position along the first direction to each other in the first hole portion and the second hole portion. It is a position where the connecting pin is detached from the first hole of at least one of the pair of first connecting portions arranged on one end side in the first direction. From the connection release position between the pair of first connecting portions in the first direction, the connecting pin is the first of the first hole portion of the one first connecting portion and the pair of second connecting portions. In order to move the connecting pin to a connecting position which is a position simultaneously inserted into the second hole portion of one said second connecting portion arranged on the one end side in one direction, the first hole portion and the said first hole portion and An engaging portion that is inserted through the second hole and engages with the connecting pin, and a portion of the connecting pin that is connected to the engaging portion and is connected to the engaging portion from the connecting position to the disengagement position on the one end side of the connecting pin in the first direction. It has a pressing portion capable of pressing along the first direction.

According to this configuration, the connecting pin mounting device has an engaging portion that can be engaged with the connecting pin. Therefore, the operator can move the connecting pin from the disconnecting position to the connecting position by engaging the connecting pin mounting device with the connecting pin and pulling it. As a result, since the connecting pin does not protrude to the outside of the first component member, the space required for mounting the connecting pin is reduced. Further, the operator does not need to enter the space between the pair of second connecting portions in order to insert the connecting pin into the first hole portion and the second hole portion, and the outside of the first constituent member and the second constituent member. The work of inserting the connecting pin can be easily performed from.

Further, according to this configuration, the operator presses the connecting pin through the pressing portion in a state where the connecting pin mounting device is engaged with the connecting pin located at the connecting position, whereby the connecting pin is pressed into each hole. It can be easily detached from the part.

Further, the method for detaching the connecting pin according to the present invention is a first component that constitutes a part of a working machine including a pair of first connecting portions arranged at intervals in a horizontal first direction. Each of the pair of first connecting portions has a first hole portion opened along the first direction, and the pair of first connecting portions are spaced apart from each other in the first direction. It is a second component that includes a pair of second connecting portions that are arranged so as to form a part of the work machine, and the pair of second connecting portions has the first hole portion in the first direction. It is a method of detaching a connecting pin for connecting a second component member having a second hole portion opened at a matching position along the first direction, respectively, and the first hole portion and the second hole portion. Engaging the connecting pin detaching device including the pressing surface from the outside of the first direction with the outer end of the connecting pin inserted into the hole in the first direction, and detaching the connecting pin. The end portion of the connecting pin is pressed inward in the first direction by the pressing surface of the instrument, and the connecting pin is at least at a position separated from the first hole portion of the first connecting portion. The connecting pin is arranged at the disconnection position between the pair of first connecting portions in the first direction, and the connecting pin arranged at the disconnecting position is provided in the second connecting portion. It is provided with holding by a pin receiving portion.

According to this method, the operator can move the connecting pin from the connecting position to the disconnecting position by engaging and pressing the connecting pin detaching device with the connecting pin. As a result, since the connecting pin does not protrude to the outside of the first component member, the space required for the connecting pin detachment work is reduced. Further, the operator does not need to enter the space between the pair of second connecting portions in order to detach the connecting pin from at least the first hole portion, and the connecting pin does not need to enter from the outside of the first constituent member and the second constituent member. The desorption work can be easily performed.

According to the present invention, it is possible to easily insert a connecting pin which is a connecting pin for connecting a plurality of constituent members of a work machine and is arranged inside the constituent member into a hole from the outside of the constituent member. Various work machine connecting devices, connecting pins, connecting pin mounting devices, and connecting pin disconnection methods are provided.

It is a side view of the work machine which concerns on one Embodiment of this invention. It is a side view which shows the state which the 1st component and the 2nd component were laid down on the ground in the assembly work of the work machine which concerns on one Embodiment of this invention. It is a top view which shows the mode that the 1st component and the 2nd component are connected in the assembly work of the work machine which concerns on one Embodiment of this invention. It is a perspective view of the connection pin mounting apparatus which concerns on one Embodiment of this invention. It is a perspective view of the connecting pin which concerns on one Embodiment of this invention. It is a perspective view which shows the mode that the connection pin attachment device is attached to the connection pin which concerns on one Embodiment of this invention. It is sectional drawing which shows the mode that the connection pin mounting apparatus is attached to the connection pin which concerns on one Embodiment of this invention. It is a perspective view which shows the appearance that the connection pin mounting apparatus was attached to the connection pin which concerns on one Embodiment of this invention. It is sectional drawing which shows the appearance that the connection pin mounting apparatus was attached to the connection pin which concerns on one Embodiment of this invention. It is a perspective view which shows the mode that the connecting pin is inserted into the hole part by using the connecting pin mounting instrument which concerns on one Embodiment of this invention. It is sectional drawing which shows the mode that the connecting pin is inserted into the hole part by using the connecting pin mounting instrument which concerns on one Embodiment of this invention. It is a perspective view which shows the mode that the connecting pin was inserted into the hole part by using the connecting pin mounting instrument which concerns on one Embodiment of this invention. FIG. 5 is a cross-sectional perspective view showing a state in which a connecting pin is inserted into a hole using a connecting pin mounting device according to an embodiment of the present invention. FIG. 5 is a cross-sectional perspective view showing a state in which a connecting pin mounting device according to an embodiment of the present invention supports a connecting member.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of the crane 10 according to the embodiment of the present invention. In the following, the directions of "up", "down", "front" and "rear" are shown in each figure, and the directions indicate the structure and assembly method of the crane 10 according to the present embodiment. It is shown for convenience for explanation, and does not limit the moving direction and usage mode of the work machine according to the present invention.

The crane 10 includes a swivel body 12 corresponding to a crane body, a traveling body 14 that supports the swivel body 12 so as to be swivel, an undulating member including a boom 16 and a jib 18, a mast 20 which is a boom undulating member, and the like. To be equipped with. Further, a counterweight 13 for adjusting the balance of the crane 10 is loaded on the rear portion of the swivel body 12. A cab 15 is provided at the front end of the swivel body 12. The cab 15 corresponds to the driver's seat of the crane 10.

As shown in FIG. 1, the boom 16 forming a part of the crane 10 is a so-called lattice type, and includes the lower boom 16A and one or more (three in the example) intermediate booms 16B, 16C, 16D. It is composed of an upper boom 16E. Specifically, the lower boom 16A is connected to the front portion of the swivel body 12 so as to be rotatable in the undulating direction. The intermediate booms 16B, 16C, and 16D are detachably added to the tip side of the lower boom 16A in that order. The upper boom 16E is detachably added to the tip side of the intermediate boom 16D, and the rear strut 21 and the front strut 22 for rotating the jib 18 and the jib 18 can rotate at the tip of the upper boom 16E, respectively. Be connected. The boom 16 is rotatably supported by the swivel body 12 around a rotation axis extending in the left-right direction with the boom foot 16S provided at the lower end as a fulcrum. The specific structure of the boom is not limited in the present invention. For example, the boom may have no intermediate member, or may have a different number of intermediate members from the above. Further, the boom may be composed of a single member.

The specific structure of the jib 18 forming a part of the crane 10 is not limited. The base end portion (jib foot 18A) of the jib 18 is rotatably connected (shaft support) to the tip end portion of the upper boom 16E of the boom 16, and the rotation shaft of the jib 18 is rotatably connected to the swivel body 12. It has a horizontal axis parallel to the rotation axis (boom foot 16S) of the boom 16.

The mast 20 has a base end and a rotating end, and the base end is rotatably connected to the swivel body 12. The rotation shaft of the mast 20 is parallel to the rotation shaft of the boom 16 and is located immediately behind the rotation shaft of the boom 16. That is, the mast 20 can rotate in the same direction as the undulating direction of the boom 16. On the other hand, the rotating end of the mast 20 is connected to the tip of the boom 16 via a pair of left and right boom guy lines 24. This connection links the rotation of the mast 20 with the rotation of the boom 16.

Further, the crane 10 includes a pair of left and right backstops 23, a rear strut 21, a front strut 22, a pair of left and right strut backstops 25 and a guy line 26, and a pair of left and right jib guy lines 28.

A pair of left and right boom backstops 23 are provided on both left and right sides of the lower boom 16A of the boom 16. These boom backstops 23 come into contact with the central portion of the swivel body 12 in the front-rear direction when the boom 16 reaches the standing posture shown in FIG. By this contact, it is regulated that the boom 16 is fanned backward by a strong wind or the like.

The rear strut 21 is rotatably supported by the tip of the boom 16. The rear strut 21 is held in a posture of projecting from the tip of the upper boom 16E to the boom standing side (left side in FIG. 1). As a means for maintaining this posture, a pair of left and right strut backstops 25 and a pair of left and right guy lines 26 are interposed between the rear struts 21 and the boom 16. The strut backstop 25 is interposed between the intermediate boom 16D and the intermediate portion of the rear strut 21, and supports the rear strut 21 from below. The guy line 26 is stretched so as to connect the tip of the rear strut 21 and the lower boom 16A of the boom 16.

The front strut 22 is arranged behind the jib 18 and is rotatably supported at the tip (upper boom 16E) of the boom 16 so as to rotate in conjunction with the jib 18. A pair of left and right jib guy lines 28 are stretched so as to connect the tip of the front strut 22 and the tip of the jib 18. Therefore, by the rotational drive of the front strut 22, the jib 18 is also rotationally driven integrally with the front strut 22.

The crane 10 further includes various winches. Specifically, the crane 10 hoists and unwinds a boom undulating winch 30 for undulating the boom 16, a jib undulating winch 32 for rotating the jib 18 in the undulating direction, and a suspended load. A winch 34 for main winding and a winch 36 for auxiliary winding are provided.

The boom undulating winch 30 winds up and unwinds the boom undulating rope 38. Then, the boom undulating rope 38 is arranged so that the mast 20 rotates by this winding and unwinding. Specifically, sheave blocks 40 and 42 in which a plurality of sheaves are arranged in the width direction are provided at the rotating end of the mast 20 and the rear end of the rotating body 12, respectively, and are pulled out from the boom undulating winch 30. The boom undulating rope 38 is hung between the sheave blocks 40 and 42. Therefore, when the boom undulating winch 30 winds up and extends the boom undulating rope 38, the distance between the two sheave blocks 40 and 42 changes, whereby the mast 20 and the boom 16 interlocking with the mast 20 undulate. Rotate in the direction.

The jib undulating winch 32 winds and unwinds the jib undulating rope 44 that is hung between the rear strut 21 and the front strut 22. Then, the jib undulating rope 44 is arranged so that the front strut 22 rotates by this winding and unwinding. Specifically, the jib undulating rope 44 pulled out from the jib undulating winch 32 is hung on the idler sheave 32S and the intermediate boom sheave 46, and is further hung between the sheave blocks 47 and 48 a plurality of times. Therefore, the jib undulating winch 32 changes the distance between the two sheave blocks 47 and 48 by winding and unwinding the jib undulating rope 44, and rotates the front strut 22 relative to the rear strut 21. Move. As a result, the jib undulating winch 32 undulates the jib 18 interlocking with the front strut 22.

The main winding winch 34 winds up and lowers the suspended load by the main winding rope 50. Regarding this main winding, the rear strut idler sheave 52, the front strut idler sheave 53, and the main winding guide sheave 54 are located near the base end of the rear strut 21, the vicinity of the base end of the front strut 22, and the tip of the jib 18, respectively. Is rotatably provided, and a main winding sheave block in which a plurality of main winding point sheaves 56 are arranged in the width direction is provided at a position adjacent to the main winding guide sheave 54. The main winding rope 50 pulled out from the main winding winch 34 is hung on the idler sheave 34S, the rear strut idler sheave 52, the front strut idler sheave 53, and the main winding guide sheave 54 in this order, and is used for the main winding of the sheave block. It is hung between the point sheave 56 and the sheave 58 of the sheave block provided on the main hook 57 for suspension. Therefore, when the main winding winch 34 winds up or unwinds the main winding rope 50, the distance between the sheaves 56 and 58 changes, and the main winding rope 50 is connected to the main winding rope 50 hanging from the tip of the jib 18. The hook 57 is wound and unwound.

Similarly, the auxiliary winding winch 36 winds up and lowers the suspended load by the auxiliary winding rope 60. For this supplementary winding, the rear strut idler sheave 52, the front strut idler sheave 53, and the guide sheave 54 for the main winding can rotate coaxially with the rear strut idler sheave 62, the front strut idler sheave 63, and the supplementary winding guide sheave 64, respectively. A supplementary winding point sheave (not shown) is rotatably provided at a position adjacent to the supplementary winding guide sheave 64. The auxiliary winding rope 60 pulled out from the auxiliary winding winch 36 is hung on the rear strut idler sheave 62, the front strut idler sheave 63, and the auxiliary winding guide sheave 64 in this order, and is hung from the auxiliary winding point sheave. Therefore, when the auxiliary winding winch 36 winds up or unwinds the auxiliary winding rope 60, the auxiliary hook for hanging load connected to the end of the auxiliary winding rope 60 is wound or unwound.

FIG. 2 is a side view showing a state in which the boom 16 and the jib 18 are laid down on the ground in the assembly work of the crane 10 according to the present embodiment. FIG. 3 is a plan view showing how the boom 16 and the jib 18 are connected in the assembly work of the crane 10.

When the crane 10 is assembled, as shown in FIG. 2, the boom 16 (first component) and the jib 18 (second component) are each laid down on the ground. In this state, the jib foot 18A of the jib 18 is connected to the tip of the boom 16.

With reference to FIG. 3, the boom 16 has at least a pair of left and right boom main frames 161 and a boom subframe 162 arranged at the tip of the boom 16.

As shown in FIG. 2, the pair of left and right boom main frames 161 are arranged so as to extend in the front-rear direction with the boom 16 lying down on the ground. The boom subframe 162 extends in the left-right direction at the tip of the boom 16 so as to connect a pair of left and right boom main frames 161. Each of the pair of boom main frames 161 has a boom connecting portion 16P (first connecting portion). As shown in FIG. 3, the pair of boom connecting portions 16P are arranged at intervals in the left-right direction (horizontal first direction), and are arranged so as to extend toward the jib 18. The boom side hole portion 16Q (first hole portion) is opened in each of the pair of boom connecting portions 16P along the left-right direction. The pair of boom side hole portions 16Q are arranged so as to face each other in the left-right direction.

With reference to FIG. 3, the jib 18 has at least a pair of left and right jib mainframes 181 and jib subframes 182 arranged at the proximal end of the jib 18.

As shown in FIG. 2, the pair of left and right jib main frames 181 are arranged so as to extend in the front-rear direction with the jib 18 lying down on the ground. The jib subframe 182 extends in the left-right direction at the base end portion of the jib 18 so as to connect a pair of left and right jib main frames 181. The pair of jib mainframes 181 each have a jib first connecting portion 18P and a jib second connecting portion 18R (second connecting portion). As shown in FIG. 3, the jib first connecting portion 18P and the jib second connecting portion 18R arranged on the left end side and the right end side of the jib 18 are spaced apart from each other in the left-right direction (horizontal first direction). They are arranged so that they extend toward the boom 16. The boom connecting portion 16P of the boom 16 can be inserted between the jib first connecting portion 18P and the jib second connecting portion 18R. The jib-side first hole portion 18Q is opened in each of the pair of left and right jib first connecting portions 18P along the left-right direction. Further, a second hole portion 18S (second hole portion) on the jib side is opened in each of the pair of left and right jib second connecting portions 18R. The pair of jib-side second hole portions 18S are arranged so as to face each other in the left-right direction. Further, the jib side first hole portion 18Q and the jib side second hole portion 18S arranged on the left end side and the right end side of the jib 18 are arranged so as to face each other (match) in the left-right direction. As shown in FIG. 3, the pair of left and right jib second connecting portions 18R are arranged inside the pair of boom connecting portions 16P in the left-right direction at intervals in the left-right direction. An inner space H is formed between the pair of jib second connecting portions 18R. Further, each of the pair of jib second connecting portions 18R has a pin receiving portion 18T (FIG. 3) that slidably supports the connecting pin 70 described later. Further, the boom connecting portion 16P, the jib first connecting portion 18P, and the jib second connecting portion 18R form a connecting portion K (FIG. 3) of the crane 10.

The crane 10 further includes a pair of connecting pins 70 and a pin attachment / detachment tool 80. The at least one connecting pin 70 and the pin attachment / detachment tool 80 constitute a connecting device for the work machine of the present invention. The connecting device connects the boom 16 and the jib 18 to each other. As shown in FIG. 3, the pair of connecting pins 70 are mounted on the pair of left and right pin receiving portions 18T. The jib 18 is lifted by an auxiliary crane (not shown) or the like, and the jib 18 sandwiches the boom connecting portion 16P at the left and right ends of the boom 16 and the jib 18 so that the jib first connecting portion 18P and the jib second connecting portion 18R sandwich the boom connecting portion 16P. Moved backwards. As a result, the jib second connecting portion 18R, the boom side hole portion 16Q, and the jib side first hole portion 18Q communicate with each other in order from the inside of the jib 18 in the left-right direction, and the connecting pin 70 can be inserted into these holes from the inside. Will be done. In the present embodiment, the operator can manually attach / detach the connecting pin 70 by using the pin attachment / detachment tool 80.

FIG. 4 is a perspective view of the pin attachment / detachment tool 80 according to the present embodiment. FIG. 5 is a perspective view of the connecting pin 70 according to the present embodiment.

With reference to FIG. 4, the pin attachment / detachment tool 80 (connecting pin mounting device, connecting pin detaching device) is made of a metal material. The pin attachment / detachment tool 80 includes a tool main body portion 801 (apparatus main body portion), a tip flange 802 (pressing portion), a tool engaging portion 803 (engaging portion), a gripping frame 804, and a central plate portion 805. Have.

The tool main body 801 is a main body of the pin attachment / detachment tool 80 and has a cylindrical shape. When the pin attachment / detachment tool 80 is used by an operator, the pin attachment / detachment tool 80 is gripped so that the axial direction of the tool body 801 is parallel to the left-right direction in FIG. The tool main body 801 has a length that simultaneously straddles the jib second connecting portion 18R, the boom connecting portion 16P, and the jib first connecting portion 18P in the left-right direction.

The tip flange 802 is a disk-shaped member arranged at the tip (left end in FIG. 4) of the tool body 801. The axial center position CL (FIG. 7) of the tool main body 801 and the center of the tip flange 802 (the axial center of the tool main body 801) are arranged at the same position. The tip flange 802 has a function of pressing the connecting pin 70.

The tool engaging portion 803 is fixed to the tip flange 802 so as to project from the center of the tip flange 802. The tool engaging portion 803 has a function of engaging with the connecting pin 70. The tool engaging portion 803 has a base end portion 803A and a tip engaging portion 803B (engaging end portion). A pair of tapers 803C is formed at the tip of the tip engaging portion 803B.

The gripping frame 804 is arranged on the side opposite to the tool engaging portion 803 (base end portion of the tool main body 801) in the left-right direction (axial direction of the tool main body 801) of the tool main body 801. As shown in FIG. 4, the gripping frame 804 is a member in which a predetermined pipe is bent in a substantially quadrangular shape, and is connected to an end portion of the tool main body portion 801 by a central plate portion 805. The gripping frame 804 has a pair of gripping portions 804A and a pair of connecting portions 804B. In the posture of the pin attachment / detachment tool 80 shown in FIG. 4, the pair of grip portions 804A are arranged at intervals in the front-rear direction. The pair of gripping portions 804A are gripped by an operator when the connecting pin 70 is attached / detached. The pair of connecting portions 804B connect the pair of grip portions 804A to each other and are fixed to the central plate portion 805, respectively.

As described above, the central plate portion 805 is arranged at the end portion (right end portion in FIG. 4) of the tool main body portion 801 and connects the gripping frame 804 and the tool main body portion 801. The impact-applied portion 805A composed of the back side (right side) surface (see FIG. 6) of the central plate portion 805 is arranged so as to be orthogonal to the left-right direction, and it is allowed that an impact is applied from the outside by a hammer or the like. do.

With reference to FIG. 5, the connecting pin 70 is made of metal, and has a pin body portion 700, a tip plate 701 (engaged portion, plate portion), a pin grip portion 702, and a guide engaging portion 70G (FIG. 5). 6) and.

The pin main body 700 is a main body of the connecting pin 70 and has a cylindrical shape. The pin body 700 has a length that simultaneously straddles the jib second connecting portion 18R, the boom connecting portion 16P, and the jib first connecting portion 18P in the left-right direction (the connecting / detaching direction of the connecting pin 70) in FIG.

The tip plate 701 is fixed so as to face the right end side (one end side in the first direction) of the pin main body 700 in the left-right direction. The tip plate 701 is a substantially circular plate-shaped member having a predetermined thickness in the left-right direction. The tip plate 701 can be engaged with the tool engaging portion 803 of the pin attachment / detachment tool 80. In particular, the tip plate 701 is arranged so as to substantially close the internal space of the pin body 700. An insertion hole 701A (engagement opening) is opened in the central portion of the tip plate 701, and four openings 701B are opened in the outer peripheral portion of the tip plate 701.

As shown in FIG. 4, each of the four openings 701B has a semicircular shape. On the other hand, the insertion hole 701A has a short side extending along the vertical direction (the second direction orthogonal to the first direction) and a length extending along the front-rear direction (the third direction orthogonal to the first direction and the second direction, respectively). It is an elongated hole-shaped opening including a side. In other words, the insertion hole 701A is orthogonal to the front-rear direction (the first direction and the second direction) of the insertion hole 701A rather than the maximum dimension in the vertical direction (the second direction orthogonal to the first direction) of the insertion hole 701A. The maximum dimension in the third direction) is large.

The pin gripping portion 702 is fixed to the pin base end portion 700S (FIG. 7) arranged on the opposite side of the pin main body portion 700 from the tip plate 701 in the left-right direction (axial direction of the connecting pin 70). The pin gripping portion 702 is a substantially U-shaped frame in a plan view. The pin gripping portion 702 is gripped by an operator when the connecting pin 70 is mounted on the pin receiving portion 18T (FIG. 3). The work is performed at the time of assembling the jib 18, and when the boom 16 and the jib 18 are connected, the pin gripping portion 702 is not necessarily gripped by the operator.

The guide engaging portion 70G (FIGS. 6 and 7) is arranged below the pin grip portion 702 of the pin base end portion 700S (FIG. 7). As shown in FIG. 7, the guide engaging portion 70G is arranged so as to extend downward from the lower end portion of the pin body portion 700, and the lower end portion has an inverted T shape protruding in the front-rear direction. There is. The guide engaging portion 70G engages with a guide groove (not shown) formed so as to extend in the left-right direction on the pin receiving portion 18T (FIG. 3). As a result, the connecting pin 70 can slide and move in the left-right direction along the guide groove. As long as the guide engaging portion 70G is engaged with the guide groove, the connecting pin 70 does not rotate in the circumferential direction. That is, the directions of the short side and the long side of the insertion hole 701A of the connecting pin 70 do not change.

6 and 7 are perspective views and cross-sectional views showing how the pin attachment / detachment tool 80 is attached to the connecting pin 70 according to the present embodiment, respectively. 8 and 9 are perspective views and cross-sectional views showing how the pin attachment / detachment tool 80 is attached to the connecting pin 70 according to the present embodiment, respectively.

In the present embodiment, the pin attachment / detachment tool 80 can be engaged with the connecting pin 70 for attaching / detaching the connecting pin 70. Specifically, after the tool engaging portion 803 of the pin attachment / detachment tool 80 is inserted into the insertion hole 701A of the connecting pin 70 (FIGS. 6 and 7), the pin attachment / detachment tool 80 is transferred to the pin body portion 700 (tool body portion 801). ) Is rotated 90 degrees around the axis, the pin attachment / detachment tool 80 engages with the connecting pin 70 (FIGS. 8 and 9).

For this purpose, the tool engaging portion 803 of the pin attachment / detachment tool 80 has a shape that can be engaged with the tip plate 701. That is, the tool engaging portion 803 arranged at the tip of the tool main body portion 801 has a short side (up and down) of the insertion hole 701A in the thickness direction (front-back direction in FIG. 4) orthogonal to the left-right direction (first direction). It has a thickness smaller than the maximum dimension in the direction). As a result, the tool engaging portion 803 can be inserted into the insertion hole 701A. Further, the base end portion 803A of the tool engaging portion 803 is inserted in the width direction (vertical direction in FIG. 4) orthogonal to the thickness direction and the left-right direction (axial direction of the tool main body portion 801) of the tool engaging portion 803. It has a width smaller than the short side of the hole 701A. As a result, the pin attachment / detachment tool 80 can rotate about the axis of the tool main body 801 with the base end portion 803A arranged in the insertion hole 701A. Further, the tip engaging portion 803B of the tool engaging portion 803 has a width smaller than the long side (maximum dimension in the front-rear direction) of the insertion hole 701A and larger than the short side, and has a width larger than the short side from the base end portion 803A in the width direction. It extends bifurcated along (vertical direction in FIG. 4). As a result, when the pin attachment / detachment tool 80 is rotated 90 degrees, the tip engaging portion 803B engages with the inner surface of the tip plate 701 around the insertion hole 701A (FIG. 9).

In other words, the pin attachment / detachment tool 80 shown in FIGS. 6 to 9 has the insertion posture shown in FIGS. 6 and 7 and the engagement posture shown in FIGS. 8 and 9. It is possible to change the posture between. The pin attachment / detachment tool 80 in the insertion posture allows the tool engaging portion 803 to be inserted into the insertion hole 701A until the tip engaging portion 803B of the tool engaging portion 803 passes through the insertion hole 701A. On the other hand, the engaging posture of the pin attachment / detachment tool 80 is a posture in which the pin attachment / detachment tool 80 is rotated around a rotation axis parallel to the left-right direction from the insertion posture. Then, the pin attachment / detachment tool 80 in the engaging posture can be integrally moved with the connecting pin 70 toward the outside in the left-right direction by engaging the tip engaging portion 803B with the back surface of the tip plate 701. ..

As described above, in the present embodiment, at least the pin attachment / detachment tool 80 is 90 around the rotation axis in a state where the tool engaging portion 803 is inserted into the insertion hole 701A to a position where the tip engaging portion 803B passes through the insertion hole 701A. The thickness and width of the tip engaging portion 803B with respect to the insertion hole 701A are set so that the pin attachment / detachment tool 80 is in the engaging posture when rotated by a degree.

In the present embodiment, in the insertion posture of the pin attachment / detachment tool 80, the pair of gripping portions 804A are arranged at intervals in the vertical direction (vertical direction). At this time, the pipe portions of the grip portion 804A extend in the horizontal direction. On the other hand, when the pin attachment / detachment tool 80 is in the engaged posture, the pair of gripping portions 804A are arranged at intervals in the front-rear direction (horizontal direction). At this time, the pipe portions of the grip portion 804A extend in the vertical direction.

10 and 11 are a perspective view and a cross-sectional perspective view showing how the connecting pin 70 is inserted into each hole using the pin attachment / detachment tool 80 according to the present embodiment, respectively. Similarly, FIGS. 12 and 13 are perspective views and cross-sectional perspective views showing how the connecting pin 70 is inserted into each hole using the pin attachment / detachment tool 80 according to the present embodiment, respectively. In the following, based on FIGS. 10 to 13, the connection pin 70 is attached to the jib side second hole portion 18S, the boom side hole portion 16Q, and the jib side first hole portion 18Q on the right side of FIG. As will be described, the same applies when the connecting pin 70 is attached to the hole on the left side. In this embodiment, one pin attachment / detachment tool 80 can be used for attaching / detaching a pair of connecting pins 70.

As shown in FIGS. 3 and 11, the pin attachment / detachment tool 80 is gripped by the operator with the connecting pin 70 arranged at the disconnection position, and the jib side first hole 18Q and the boom side are gripped from the outside of the jib main frame 181. The pin attachment / detachment tool 80 is inserted into the hole portion 16Q and the jib side second hole portion 18S in order. Then, after the tool engaging portion 803 of the pin attachment / detachment tool 80 is inserted into the insertion hole 701A of the connecting pin 70, the pin is changed from the insertion posture shown in FIGS. 6 and 7 to the engaging posture shown in FIGS. 8 and 9. The posture of the attachment / detachment tool 80 is changed (rotated). Then, as shown in FIGS. 10 and 11, the pin attachment / detachment tool 80 is held in a state where the pair of gripping portions 804A (FIG. 8) arranged at intervals in the horizontal direction are gripped by the operator, and the pin attachment / detachment tool 80 is shown in FIGS. It is pulled out in the direction of the arrow in FIG. At this time, the tool engaging portion 803 of the pin attachment / detachment tool 80 is engaged with the tip plate 701 of the connecting pin 70. Therefore, the connecting pin 70 arranged at the disconnection position in FIG. 11 moves together with the pin attachment / detachment tool 80, and is inside the jib side second hole portion 18S, the boom side hole portion 16Q, and the jib side first hole portion 18Q. Will be inserted in order. As a result, the connecting pin 70 and the pin attachment / detachment tool 80 are in the state shown in FIGS. 12 and 13, and the boom connecting portion 16P and the jib first connecting portion 18P are connected by the connecting pin 70.

On the other hand, when the jib foot 18A of the jib 18 is detached from the boom 16 during the disassembling work of the crane 10, the pin attachment / detachment tool 80 is attached to the connecting pin 70 as shown in FIG. Also in this case, after the tool engaging portion 803 of the pin attachment / detachment tool 80 is inserted into the insertion hole 701A of the connecting pin 70, the engaging posture shown in FIGS. The attitude of the pin attachment / detachment tool 80 is changed (rotated). Then, in the state shown in FIGS. 12 and 13, the operator presses the pin attachment / detachment tool 80 to the left (inside the boom 16 and jib 18) while gripping the pair of grip portions 804A (FIG. 8). .. At this time, the tip flange 802 (FIGS. 4 and 9) of the pin attachment / detachment tool 80 presses the tip plate 701 (FIGS. 5 and 9) of the connecting pin 70, so that the pin attachment / detachment tool 80 presses the connecting pin 70. Is transmitted. As a result, while the connecting pin 70 moves to the left, it comes out in order from the jib side first hole portion 18Q, the boom side hole portion 16Q, and the jib side second hole portion 18S. Then, the connecting pin 70 reaches the disconnecting position shown in FIG. 11 again. At this time, the guide engaging portion 70G of the connecting pin 70 comes into contact with a stopper (not shown) provided at the end of the pin receiving portion 18T, so that the movement of the connecting pin 70 is stopped. In FIG. 13, when the connecting pin 70 is difficult to move due to the position of each hole being slightly deviated, the operator can perform the impact-applied portion 805A of the central plate portion 805 of the pin attachment / detachment tool 80 ( FIG. 8) can be hit with a hammer or the like. As a result, an impact is applied from the pin attachment / detachment tool 80 to the connecting pin 70, and the connecting pin 70 is promoted to be detached. Further, in the state shown in FIG. 13, the tool engaging portion 803 is inserted and engaged with the insertion hole 701A of the tip plate 701. Specifically, the bifurcated tip engaging portion 803B of the tool engaging portion 803 is engaged with the portions of the tip plate 701 located above and below the insertion hole 701A. Therefore, even if the pin attachment / detachment tool 80 is released from the pin attachment / detachment tool 80 until the operator picks up the hammer, the pin attachment / detachment tool 80 is prevented from being detached from the connecting pin 70 and dropped. Therefore, the disconnection operation of the connecting pin 70 can be performed by one operator from the outside in the width direction of the boom 16 and the jib 18.

FIG. 14 is a cross-sectional perspective view showing a state in which the pin attachment / detachment tool 80 according to the present embodiment supports the boom connecting portion 16P. As described above, when the connecting pin 70 is detached while the pin attachment / detachment tool 80 is pressed by the operator, the boom 16 and the jib 18 are supported by the auxiliary crane or the upper swing body 12 (FIG. 1). There is. However, if the boom connecting portion 16P, the jib first connecting portion 18P, and the jib second connecting portion 18R are strongly restrained, the positions of the holes are difficult to match, and the connecting pin 70 is difficult to detach. Therefore, it is desirable that the periphery of the connecting pin 70 is supported so as to have a certain degree of freedom. On the other hand, if the connecting pin 70 is suddenly detached by using the pin attachment / detachment tool 80 in such a state, for example, the boom connecting portion 16P suddenly drops or rises. Even in such a case, in the present embodiment, as shown in FIG. 14, the pin attachment / detachment tool 80 inserted in each hole can support the boom connecting portion 16P that suddenly falls off. (See support M in FIG. 14). Therefore, the boom connecting portion 16P is prevented from falling to the ground, and the connecting pin 70 can be safely detached. Even if the boom connecting portion 16P suddenly rises with the disconnection of the connecting pin 70 while the boom 16 is lifted by an auxiliary crane or the like, the pin attachment / detachment tool 80 similarly raises the boom connecting portion 16P. Can be regulated to.

As described above, in the present embodiment, the boom 16 and the jib 18 can be connected and the connection can be released by the pair of connecting pins 70 (at least one connecting pin 70) and the pin attachment / detachment tool 80. The connecting pin 70 located on the right side of FIG. 3 of the pair of connecting pins 70 is a boom side hole of one boom connecting portion 16P arranged on the right side (one end side in the first direction) of the pair of boom connecting portions 16P. The boom 16 and the jib 18 are placed on the right side by being inserted into the jib side second hole portion 18S of one jib second connecting portion 18R arranged on the right side of the portion 16Q and the pair of jib second connecting portions 18R. Connect with. Further, the connecting pin 70 located on the right side is also inserted into the jib side first hole portion 18Q of one jib first connecting portion 18P arranged on the right side of the pair of jib first connecting portions 18P. As a result, the right side portions of the boom 16 and the jib 18 are securely connected by the connecting pin 70. The position of such a connection pin 70 can be changed between the connection position shown in FIG. 13 and the connection release position shown in FIG. At the connecting position, as described above, the connecting pin 70 includes the boom side hole portion 16Q of the one boom connecting portion 16P, the jib side second hole portion 18S of the one jib second connecting portion 18R, and the above one. It is inserted into the jib side first hole portion 18Q of the jib first connecting portion 18P. On the other hand, when the connecting pin 70 is pulled out from at least the jib side first hole portion 18Q of the one jib first connecting portion 18P and the boom side hole portion 16Q of the one boom connecting portion 16P to the inside of the boom 16, the connecting pin 70 is pulled out. 70 reaches a connection release position located between the pair of boom connecting portions 16P in the left-right direction. On the other hand, the pin attachment / detachment tool 80 has a length in the left-right direction that penetrates the jib-side first hole portion 18Q, the boom-side hole portion 16Q, and the jib-side second hole portion 18S that are adjacent to each other in the left-right direction. Then, the pin attachment / detachment tool 80 can be inserted into the jib side first hole portion 18Q, the boom side hole portion 16Q, and the jib side second hole portion 18S in this order from the outside in the left-right direction of the one boom connecting portion 16P. It is said that. Further, the pin attachment / detachment tool 80 has a tool engaging portion 803 that can be engaged with the connecting pin 70 located at the disengagement position.

According to such a connecting pin 70 and the pin attachment / detachment tool 80, the operator engages the pin attachment / detachment tool 80 with the connecting pin 70 and pulls it toward the front to move the connecting pin 70 from the disconnection position to the connection position. Can be made to. As a result, the connecting pin 70 does not protrude outward in the width direction of the boom 16 (jib 18), so that the space required for mounting the connecting pin 70 is reduced. Further, a space between a pair of jib second connecting portions 18R for inserting the connecting pin 70 into the jib side second hole portion 18S, the boom side hole portion 16Q and the jib side first hole portion 18Q (inner space in FIG. 3). It is not necessary for an operator to enter H), and the work of inserting the connecting pin 70 can be easily performed from the outside of the boom 16 and the jib 18. In the state shown in FIG. 11, the operator can easily confirm the position (match) of each hole from the outside in the width direction of the boom 16 (jib 18). Therefore, one worker can perform the insertion work of the connecting pin 70.

Further, in the present embodiment, the connecting pin 70 has a cylindrical pin main body portion 700 and a tip plate 701 arranged on one end side of the pin main body portion 700. According to such a configuration, since the tip plate 701 is arranged on one end side of the pin body 700, the pin attachment / detachment tool 80 can be easily engaged with the connecting pin 70.

Further, in the present embodiment, an insertion hole 701A is opened in the central portion of the tip plate 701. Further, the pin attachment / detachment tool 80 includes a tool main body portion 801 and a tool engaging portion 803. According to such a configuration, the operator can easily engage the pin attachment / detachment tool 80 and the connection pin 70 by inserting the tool engagement portion 803 of the pin attachment / detachment tool 80 into the insertion hole 701A of the connection pin 70. Can be made to.

Further, in the present embodiment, the pin attachment / detachment tool 80 can change its posture between the insertion posture shown in FIGS. 6 and 7 and the engaging posture shown in FIGS. 8 and 9. According to such a configuration, the operator can easily engage the pin attachment / detachment tool 80 and the connecting pin 70 by changing the posture of the pin attachment / detachment tool 80 from the insertion posture to the engagement posture.

Further, in the present embodiment, the pin attachment / detachment tool 80 has a pair of grip portions 804A. The pair of grips 804A are arranged vertically spaced apart from each other in the insertion posture of the pin attachment / detachment tool 80. Therefore, the operator can insert the tool engaging portion 803 of the pin attachment / detachment tool 80 into the insertion hole 701A of the connecting pin 70 while gripping the pair of grip portions 804A. At this time, a pair of grip portions 804A are arranged at intervals in the vertical direction. Therefore, the operator can stably support the pin attachment / detachment tool 80 in a posture in which one hand is on the top and the other hand is on the bottom.

Further, in the present embodiment, at least the pin attachment / detachment tool 80 is a rotation axis parallel to the left-right direction in a state where the tip engaging portion 803B is inserted into the insertion hole 701A until the tip engaging portion 803B passes through the insertion hole 701A. The thickness and width of the tip engaging portion 803B with respect to the insertion hole 701A are set so that the pin attachment / detachment tool 80 takes the engaging posture when rotated 90 degrees around the tool main body portion 801). Therefore, the operator can easily pull the pin attachment / detachment tool 80 in the engaged posture in a stable posture while keeping the left and right hands horizontal.

Further, in the present embodiment, the tool body portion 801 of the pin attachment / detachment tool 80 is a pressing portion (tip flange 802) capable of pressing the periphery of the insertion hole 701A of the tip plate 701 along the left-right direction (left direction in FIG. 13). ), And the base end portion 803A of the tool engaging portion 803 is connected to the tip flange 802. Therefore, the operator presses the connecting pin 70 via the tip flange 802 in a state where the pin attachment / detachment tool 80 is engaged with the connecting pin 70 located at the connecting position, whereby the connecting pin 70 is pressed into each hole. Can be easily detached from.

Further, the central plate portion 805 of the pin attachment / detachment tool 80 has an impact-applied portion 805A. Therefore, when the operator uses the pin attachment / detachment tool 80 to detach the connecting pin 70, the operator applies an impact to the impact-applied portion 805A to give an impact to the connecting pin 70 via the pin attachment / detachment tool 80. Can be given. As a result, when the positions of the boom side hole portion 16Q, the jib side second hole portion 18S, and the jib side first hole portion 18Q are slightly deviated, or there is a sliding resistance between each hole portion and the connecting pin 70. Even in this case, the connecting pin 70 can be easily detached.

Further, the connecting pin 70 according to the present embodiment is inserted into the connecting release position located between the pair of boom connecting portions 16P, the boom side hole portion 16Q, the jib side first hole portion 18Q, and the jib side second hole portion 18S. It is said that it can be moved to and from the connected position. Then, the connecting pin 70 has a tip plate 701 that can be engaged with the pin attachment / detachment tool 80. Therefore, the operator can move the connecting pin 70 from the disconnecting position to the connecting position by engaging the pin attachment / detachment tool 80 with the connecting pin 70 and pulling it. As a result, in order to insert the connecting pin 70 into the boom side hole portion 16Q, the jib side first hole portion 18Q, and the jib side second hole portion 18S, the operator enters the space H between the pair of jib second connecting portions 18R. It is not necessary to enter, and the work of inserting the connecting pin 70 can be easily performed from the outside of the boom 16 and the jib 18. Further, the operator can easily engage the pin attachment / detachment tool 80 and the connection pin 70 by inserting the tool engagement portion 803 of the pin attachment / detachment tool 80 into the insertion hole 701A of the connection pin 70.

Further, the pin attachment / detachment tool 80 according to the present embodiment has a tool engaging portion 803 that can be engaged with the connecting pin 70. Therefore, the operator can move the connecting pin 70 from the disconnecting position to the connecting position by engaging the pin attachment / detachment tool 80 with the connecting pin 70 and pulling it. As a result, in order to insert the connecting pin 70 into the boom side hole portion 16Q, the jib side first hole portion 18Q, and the jib side second hole portion 18S, the operator enters the space H between the pair of jib second connecting portions 18R. It is not necessary to enter, and the work of inserting the connecting pin 70 can be easily performed from the outside of the boom 16 and the jib 18. Further, the operator can easily detach the connecting pin 70 by pressing the connecting pin 70 via the tip flange 802 while the pin attachment / detachment tool 80 is engaged with the connecting pin 70 located at the connecting position. Can be made to.

Further, the method of mounting the connecting pin 70 (method of connecting the boom 16 and the jib 18) according to the present embodiment includes a pair of first connecting portions arranged at intervals in the horizontal first direction of the work machine. A first component that is a part of the first component and has a first hole opened in each of the pair of first connecting portions along the first direction, and the pair of first connecting portions. A second component that includes a pair of second connecting portions that are spaced apart from each other in the first direction and constitutes a part of the working machine, and the pair of second connecting portions It is a method of connecting a working machine that connects a second component member having a second hole portion opened along the first direction at a position corresponding to the first hole portion in the first direction and each other. The first hole portion and the connecting pin that can be inserted into the second hole portion are arranged on one end side of at least one of the pair of first connection portions in the first direction. A connecting pin that is detached from the first hole of the connecting portion and is arranged at a disconnection position between the pair of first connecting portions in the first direction and that can be engaged with the connecting pin. The mounting device is inserted through the first hole portion and the second hole portion and engaged with the connecting pin, and the connecting pin mounting device engaged with the connecting pin is pulled along the first direction. This includes inserting the connecting pin into the second hole portion and the first hole portion in order while moving the connecting pin integrally with the connecting pin mounting device. According to such a method, the operator can move the connecting pin 70 from the disconnecting position to the connecting position by engaging the pin attachment / detachment tool 80 with the connecting pin 70 and pulling it. As a result, in order to insert the connecting pin 70 into the boom side hole portion 16Q, the jib side first hole portion 18Q, and the jib side second hole portion 18S, the operator enters the space H between the pair of jib second connecting portions 18R. It is not necessary to enter, and the work of inserting the connecting pin 70 can be easily performed from the outside of the boom 16 and the jib 18.

Further, the method of disconnecting the connecting pin 70 (method of disconnecting the boom 16 and the jib 18) according to the present embodiment includes a pair of first connecting portions arranged at intervals in the horizontal first direction. A first component that constitutes a part of a machine and has a first hole opened in each of the pair of first connecting portions along the first direction, and the pair of first components. A second component that includes a pair of second connecting portions arranged between the connecting portions at intervals in the first direction and constitutes a part of the working machine, and the pair of second connecting portions. A method of detaching a connecting pin for connecting to a second component member having a second hole portion opened along the first direction at a position corresponding to the first hole portion in the first direction. The connection pin detaching device including the pressing surface is engaged with the connecting pin inserted into the first hole portion and the second hole portion from the outside in the first direction, and the connection is performed. The connecting pin is pressed inward in the first direction through the pressing surface of the pin detaching device, and the connecting pin is at least at a position where the connecting pin is detached from the first hole of the first connecting portion. The connection pin is provided at the connection release position between the pair of first connection portions in the first direction, and the connection pin arranged at the connection release position is provided in the second connection portion. It is provided with holding by a pin receiving portion. According to such a method, the operator can move the connecting pin 70 from the connecting position to the disconnecting position by engaging and pressing the pin attachment / detachment tool 80 with the connecting pin 70. As a result, since the connecting pin 70 does not protrude to the outside of the boom 16, the space required for the detaching work of the connecting pin 70 is reduced. Further, it is not necessary for the operator to enter the space H between the pair of jib second connecting portions 18R in order to detach the connecting pin 70 from at least the boom side hole portion 16Q, and the connecting pin 70 is connected from the outside of the boom 16 and the jib 18. The work of removing the pin 70 can be easily performed.

The connection device for the crane 10, the connection pin 70, the pin attachment / detachment tool 80, the connection method for the crane 10, and the attachment / detachment method for the crane 10 according to the embodiment of the present invention have been described above. The present invention is not limited to these forms. The present invention can take, for example, the following modified embodiments.

(1) Further, in the above embodiment, the crane 10 shown in FIG. 1 has been described as a working machine, but the present invention is not limited thereto. The present invention may be applied to other working machines such as excavators, crushers and excavators.

(2) In the above embodiment, the boom 16 and the jib 18 are connected by the connecting pin 70. For example, the lower boom 16A (first component) and the intermediate boom 16B (second component) of the boom 16 are connected. The component) may be connected by the connecting pin 70.

(3) Further, in the above embodiment, as shown in FIG. 3, the boom connecting portion 16P is sandwiched between the jib first connecting portion 18P and the jib second connecting portion 18R, but the jib 18 is described. , Only a pair of jib second connecting portions 18R may be provided. Also in this case, the boom connecting portion 16P including the boom side hole portion 16Q and the jib second connecting portion 18R including the jib side second hole portion 18S are connected by the connecting pin 70. Further, in FIG. 3, a pair of boom connecting portions 16P are arranged at the tips of the pair of boom main frames 161 of the boom 16, and one jib first connecting portion 18P is arranged at the tips of the pair of jib main frames 181 of the jib 18. May be arranged. In this case, the boom 16 and the jib 18 are connected by inserting one jib first connecting portion 18P between the pair of boom connecting portions 16P on both the left and right sides of the boom 16.

Further, in the above embodiment, in the insertion posture of the pin attachment / detachment tool 80, the pair of gripping portions 804A are arranged at intervals in the vertical direction (vertical direction), and when the pin attachment / detachment tool 80 is in the engaging posture, the pair The grip portion 804A of the above has been described in a manner in which the grip portions 804A are arranged at intervals in the front-rear direction (horizontal direction), but the present invention is not limited thereto. In the insertion posture of the pin attachment / detachment tool 80, the pair of grip portions 804A are arranged at intervals in the front-rear direction (horizontal direction), and when the pin attachment / detachment tool 80 is in the engaging posture, the pair of grip portions 804A move in the vertical direction. It may be arranged so as to be spaced apart from each other in the (vertical direction). In this case, the insertion hole 701A may be formed in an elongated hole shape so as to extend in the vertical direction in FIG. Further, in another modification embodiment, the insertion hole 701A may remain in the shape shown in FIG. 5, and the pair of gripping portions 804A in FIG. 4 may be arranged so as to face each other in the vertical direction. In this case, the direction in which the pair of gripping portions 804A face each other (vertical direction) coincides with the direction in which the tip engaging portion 803B extends from the base end portion 803A (vertical direction). On the other hand, in the embodiment shown in FIG. 4, the direction in which the pair of grip portions 804A face each other (front-rear direction) is orthogonal (intersect) with the direction in which the tip engaging portion 803B extends from the base end portion 803A (vertical direction). (Different).

10 Crane 12 Swing body 13 Counterweight 14 Traveling body 16 Boom (first component)
16P boom connecting part (first connecting part)
16Q Boom side hole (1st hole)
16S Boom foot 161 Boom main frame 162 Boom subframe 18 Jib (second component)
18A Jib foot 18P Jib 1st connecting part 18Q Jib side 1st hole part 18R Jib 2nd connecting part (2nd connecting part)
18S jib side second hole (second hole)
18T Pin receiving part 181 Jib main frame 182 Jib subframe 70 Connecting pin 70G Guide engaging part 700 Pin body 700A Inclined part 700S Pin base end 701 Tip plate (engaged part, plate part)
701A Insertion hole (engagement opening)
701B Opening 702 Pin gripping part 80 Pin attachment / detachment tool (connecting pin mounting device, connecting pin detaching device)
801 Tool body (instrument body)
802 Tip flange (pressing part)
803 Tool engaging part (engaging part)
803A Base end 803B Tip engagement (engagement end)
803C Taper 804 Grip frame 804A Grip part 804B Connection part 805 Central plate part 805A Impact-applied part H Inner space K Connection part M Support part

Claims (8)

It is a first component that includes a pair of first connecting portions arranged at intervals in a horizontal first direction and constitutes a part of a work machine, and the pair of first connecting portions has the first one. Includes a first component in which a first hole is opened along a direction and a pair of second connecting portions that are spaced apart from each other in the first direction between the pair of first connecting portions. The second component that constitutes a part of the work machine, and the pair of second connecting portions has a second hole along the first direction at a position that matches the first hole portion in the first direction. The pair with the first connecting portion arranged on one end side in the first direction of at least the pair of first connecting portions of the work machine having the second component members each having the portions opened. A connecting device for a work machine that connects one of the second connecting portions of the above to the second connecting portion arranged on one end side in the first direction.
At least one connecting pin that connects the first constituent member and the second constituent member, and the connecting pin is arranged on one end side of the pair of first connecting portions in the first direction. In the first hole portion of the first first connecting portion and the second hole portion of the first second connecting portion arranged on the one end side of the first direction of the pair of second connecting portions. The pair at the connecting position where the connecting pins are inserted at the same time and at the position where the connecting pins are detached from the first hole of at least the first connecting portion in the first direction. A connecting pin that can be moved between the first connecting parts of the
It has a length in the first direction that penetrates the first hole portion and the second hole portion that are adjacent to each other in the first direction, and is from the outside of the first direction of the first connecting portion. It is a connecting pin mounting device that can be inserted into the first hole portion and the second hole portion in order, and in the connecting pin mounting device, the connecting pin mounting device is the first hole portion and the second hole portion. An engaging portion that can be engaged with the connecting pin located at the disconnecting position while being inserted through the hole, and the connecting pin can be pressed from the connecting position to the disconnecting position along the first direction. A connecting pin mounting device having a pressing portion and
With
The connecting pin
A cylindrical pin body having a length in the first direction that penetrates the first hole and the second hole that are adjacent to each other in the first direction.
An engaged portion that is arranged on one end side of the pin body portion in the first direction and can be engaged with the engaging portion, and is pressed by the pressing portion from the connecting position to the disengaging position. have a, and the engaged portion comprising a pressed surface which is capable,
The connecting pin is a plate portion fixed to the one end side of the pin main body portion in the first direction so as to face the first direction and having a predetermined thickness along the first direction. At the center of the plate portion, there is an engagement opening having a larger maximum dimension in the first direction and a third direction orthogonal to the second direction than the maximum dimension in the second direction orthogonal to the first direction. The plate portion is opened so as to penetrate along the first direction, and the outer surface of the plate portion in which the engagement opening is opened constitutes the pressed surface. Further has a plate portion as the engaged portion,
The connecting pin mounting device is
An instrument main body having a length straddling the first hole and the second hole in the first direction,
The engaging portion arranged at the tip of the instrument main body in the first direction and having a thickness smaller than the maximum dimension of the engaging opening in the second direction in the thickness direction orthogonal to the first direction. The engaging portion is connected to the main body of the appliance, and the maximum dimension of the engaging opening in the second direction in the thickness direction of the engaging portion and the width direction orthogonal to the first direction. The base end portion having a width smaller than that and the instrument main body portion are connected to the base end portion on the opposite side of the first direction, and are smaller than the maximum dimension of the engagement opening in the third direction and said to be the first. The engaging portion having an engaging end portion extending bifurcated in the width direction from the base end portion so as to have a width larger than the maximum dimension of the engaging opening in two directions.
The pressing portion connected to the base end portion of the engaging portion and capable of pressing the pressed surface, and the pressing portion.
Have,
The connecting pin mounting device is
An insertion posture that allows the engaging portion to be inserted into the engaging opening until the engaging end passes through the engaging opening.
By engaging the engaging end portion with the back surface of the plate portion, the posture of the connecting pin mounting device can be changed between the engaging posture and the engaging posture in which the connecting pin mounting device can move integrally with the connecting pin toward the outside in the first direction. Is a work machine coupling device. The connecting device for a work machine according to claim 1 , wherein the connecting pin mounting device has a pair of gripping portions arranged on the opposite side of the engaging portion in the first direction of the instrument main body portion. The connecting device for a work machine according to claim 2 , wherein the pair of grips are arranged at intervals in the vertical direction in the insertion posture. The connecting device for a work machine according to claim 3 , wherein the pair of gripping portions are arranged horizontally spaced apart from each other in the engaging posture. The connecting pin mounting device is arranged so as to be orthogonal to the first direction on the side opposite to the engaging portion in the first direction of the device main body portion, and allows an impact to be applied from the outside. The connecting device for a work machine according to any one of claims 1 to 4, further comprising an impact-applied portion. It is a first component that includes a pair of first connecting portions arranged at intervals in a horizontal first direction and constitutes a part of a work machine, and the pair of first connecting portions has the first one. Includes a first component in which a first hole is opened along a direction and a pair of second connecting portions that are spaced apart from each other in the first direction between the pair of first connecting portions. The second component that constitutes a part of the work machine, and the pair of second connecting portions has a second hole along the first direction at a position that matches the first hole portion in the first direction. It is a connecting pin of a work machine that connects the second component members, each of which has an open portion, to each other.
A cylindrical pin body having a length in the first direction that penetrates the first hole and the second hole that are adjacent to each other in the first direction.
The first connecting pin is at a position detached from the first hole of one of the first connecting portions arranged on one end side in the first direction of at least the pair of first connecting portions. From the disconnection position between the pair of first connecting portions in the direction, the connecting pin is the first hole portion of the one first connecting portion and the pair of second connecting portions in the first direction. In order to move to a connecting position which is a position simultaneously inserted into the second hole portion of one said second connecting portion arranged on one end side, the first hole portion and the said first hole portion and the said from the outside in the first direction. It has a plate portion that engages with a predetermined connecting pin mounting device that is inserted into the second hole portion.
The plate portion faces the one end side of the pin main body portion in the first direction in the first direction so that the plate portion can be pressed by the connecting pin mounting device from the connecting position to the disconnecting position. An engaging opening that is fixed in such a manner and has a predetermined thickness along the first direction and is capable of receiving a part of the connecting pin mounting device at the center of the plate portion. An engagement opening having a larger maximum dimension in the first direction and a third direction orthogonal to the second direction than the maximum dimension in the second direction orthogonal to the first direction guides the plate portion along the first direction. are opened so as to penetrate through Te, the outer surface of the first direction in which the engagement opening is opened out of the plate portion, constitutes a pressed surface that is pressed by the connecting pin mounting device There are connecting pins for work machines. It is a first component that includes a pair of first connecting portions arranged at intervals in a horizontal first direction and constitutes a part of a work machine, and the pair of first connecting portions has the first one. Includes a first component in which a first hole is opened along a direction and a pair of second connecting portions that are spaced apart from each other in the first direction between the pair of first connecting portions. The second component that constitutes a part of the work machine, and the pair of second connecting portions has a second hole along the first direction at a position that matches the first hole portion in the first direction. A connecting pin mounting device for mounting a connecting pin for connecting a second component having an open portion to each other in the first hole portion and the second hole portion.
The first connecting pin is at a position separated from the first hole of one of the first connecting portions arranged on one end side in the first direction of at least the pair of first connecting portions. From the disconnection position between the pair of first connecting portions in the direction, the connecting pin is the first hole portion of the one first connecting portion and the pair of second connecting portions in the first direction. The first hole portion and the second hole portion in order to move the connecting pin to a connecting position which is a position simultaneously inserted into the second hole portion of one said second connecting portion arranged on one end side. An engaging portion that is inserted into the portion and engages with the connecting pin, and a portion of the connecting pin that is connected to the base end portion of the engaging portion and is connected to the connecting position to the disengagement position on the one end side of the connecting pin in the first direction. A connecting pin mounting device having a pressing surface orthogonal to the first direction capable of pressing along the first direction. It is a first component that includes a pair of first connecting portions arranged at intervals in a horizontal first direction and constitutes a part of a work machine, and the pair of first connecting portions has the first one. Includes a first component in which a first hole is opened along a direction and a pair of second connecting portions that are spaced apart from each other in the first direction between the pair of first connecting portions. The second component that constitutes a part of the work machine, and the pair of second connecting portions has a second hole along the first direction at a position that matches the first hole portion in the first direction. It is a method of detaching a connecting pin that connects a second component member having an open portion and a second component to each other.
As the connecting pin, a cylindrical pin body portion having a length in the first direction that penetrates the first hole portion and the second hole portion adjacent to each other in the first direction, and the pin body portion. A plate portion fixed to the outer end portion of the first direction so as to face the first direction and having a predetermined thickness along the first direction, and is engaged with the central portion of the plate portion. To prepare a connecting pin having a plate portion whose opening is opened so as to penetrate the plate portion along the first direction.
A pressing surface connected to the engaging portion and the base end portion of the engaging portion is provided in the engaging opening of the plate portion of the connecting pin inserted into the first hole portion and the second hole portion. Inserting the engaging portion of the connecting pin disengagement device including the engaging portion from the outside in the first direction and engaging the engaging portion with the plate portion.
The pressed toward the inside of the first direction by the pressing surface of the outer surface of the first direction in which the engagement opening is opened the connecting pin desorption instrument of the plate portion of the connecting pin, The connecting pin is arranged at a position where the connecting pin is at least detached from the first hole of the first connecting portion and at a position where the connecting pin is released between the pair of first connecting portions in the first direction. That and
The connecting pin arranged at the disconnection position is held by the pin receiving portion provided in the second connecting portion, and
A method of detaching the connecting pin.

Images