Adapter and upper rotating body

Abstract

To provide an adapter allowing a gap between a structure of a super structure and the adapter to be secured.SOLUTION: An adapter 40 is provided with a second boom foot attachment part 63. The second boom foot attachment part 63 allows a second boom 21a to be placed so as to be clamped from a lateral direction Y as well as a base end part of the second boom 21a to be attached thereon. A gap L3 in the lateral direction Y of the second boom foot attachment part 63 is narrower than a width L1 in the lateral direction Y of an adapter side rear attachment part 61. A center part in the lateral direction Y of the second boom foot attachment part 63 is shifted in the lateral direction Y with respect to a center part in the lateral direction Y of the adapter side rear attachment part 61.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to an adapter that can be attached to a rotating frame, and an upper rotating body that is equipped with the adapter. [Background technology]

[0002] For example, Patent Document 1 discloses an adapter that can be attached to a rotating frame. This adapter can be used to attach a boom. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-59183 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology shown in Figure 1 of the document, the gap between the structure of the upper rotating body (e.g., the driver's cab, guard, etc.) and the adapter is narrow, which may result in problems such as difficulty in arranging the equipment around the adapter and difficulty in working around the adapter.

[0005] Therefore, an object of the present invention is to provide an adapter and an upper rotating body that can ensure a gap between the structure of the upper rotating body and the adapter. [Means for solving the problem]

[0006] The adapter can be attached to the vertical plate portion. The vertical plate portions are arranged at intervals in the lateral direction of the revolving frame, and a first boom can be attached to the vertical plate portion. The adapter can be attached to a second boom different from the first boom. The adapter includes an adapter lower member and an adapter upper member. The adapter lower member can be attached to the vertical plate portion. The adapter upper member is provided above the adapter lower member, and the second boom can be attached to the adapter lower member. The adapter lower member includes an adapter side rear mounting portion and an adapter side front mounting portion. The adapter side rear mounting portion can be attached to a portion of the vertical plate portion to which the first boom can be attached. The adapter side front mounting portion can be attached to a portion of the vertical plate portion to which a first boom hoisting cylinder for hoisting the first boom can be attached. The adapter upper member includes a second boom foot mounting portion that can be arranged to sandwich the second boom from the lateral direction and to which the base end of the second boom can be attached. The lateral spacing of the second boom foot mounting portions is narrower than the lateral width of the adapter-side rear mounting portion. The lateral center portions of the second boom foot mounting portions are offset in the lateral direction with respect to the lateral center portions of the adapter-side rear mounting portion. Effect of the Invention

[0007] According to the above embodiment, a gap can be secured between the structure of the upper rotating body and the adapter. [Brief description of the drawings]

[0008] [Figure 1] 1 is a view of a first working machine 1A as viewed from a lateral direction Y. FIG. [Diagram 2] 1 is a view of a second working machine 1B as seen from a lateral direction Y. FIG. [Diagram 3] 3 is a diagram showing the upper rotating body 30 and the like shown in FIG. 2 as viewed from the lateral direction Y. FIG. [Figure 4] 4 is a diagram showing the adapter 40 and the like shown in FIG. 3 as viewed from the lateral direction Y. FIG. [Diagram 5] 3 is a view of the upper rotating body 30 shown in FIG. 2 as viewed from the upper side Z1. [Figure 6] 6 is a diagram showing the adapter 40 and the like shown in FIG. 5 as viewed from the upper side Z1. [Figure 7] 3 is a view of the upper rotating body 30 shown in FIG. 2 as viewed from the front side X1. [Figure 8] 3 is a perspective view of the adapter 40 shown in FIG. 2 as viewed from the front side X1 and the upper side Z1. [Figure 9] 9 is a perspective view of the adapter 40 shown in FIG. 8 as viewed from the rear side X2 and the lower side Z2. [Figure 10] 8 is a cross-sectional view of the F10 portion of FIG. 7 as viewed from the front side X1. [Figure 11] 11 is a view of the mounting position adjustment member 70 shown in FIG. 10 as viewed in the direction of the arrow F11. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The working machine 1 shown in Figs. 1 and 2 will be described with reference to Figs. 1 to 11.

[0010] The work machine 1 is a machine that performs work, for example a construction machine that performs construction work. The work machine 1 can be a first work machine 1A equipped with a first attachment 11 shown in FIG. 1, and a second work machine 1B equipped with a second attachment 21 shown in FIG. 2. The first work machine 1A shown in FIG. 1 is, for example, a shovel. The second work machine 1B shown in FIG. 2 is, for example, a crane. For example, the first work machine 1A (old work machine, base machine) shown in FIG. 1 is changed to a second work machine 1B (new work machine) shown in FIG. 2. As shown in FIG. 1, when the work machine 1 is the first work machine 1A, the first work machine 1A is equipped with the first attachment 11 and a first boom hoisting cylinder 13. As shown in FIG. 2, when the work machine 1 is the second work machine 1B, the second work machine 1B is equipped with the second attachment 21, a second boom hoisting cylinder 23, and a second boom mounted device 25. As shown in FIG. 1, the work machine 1, whether it is a first work machine 1A or a second work machine 1B (see FIG. 2), includes a lower traveling body 5 and an upper rotating body 30.

[0011] The lower traveling body 5 allows the work machine 1 to travel. For example, the lower traveling body 5 may be equipped with crawlers or may be equipped with wheels. The work machine 1 may be a wheeled work machine (e.g., a wheeled shovel, a wheeled crane, etc.) or a crawler type work machine (e.g., a crawler shovel, a crawler crane, etc.).

[0012] The first attachment 11 is an attachment that is provided on the work machine 1 when the work machine 1 is the first work machine 1A. The first attachment 11 performs work. For example, the first attachment 11 includes a first boom 11a, an arm 11b, and a tip attachment 11c. The first boom 11a is attached to the upper rotating body 30 so as to be able to rise and fall (to be able to rotate in the vertical direction Z). The base end of the first boom 11a (the end attached to the upper rotating body 30, the boom foot) is attached to a vertical plate part side rear attachment part 31b1 of the vertical plate part 31b described later. The "end part" means the end and its surrounding part (hereinafter the same). The arm 11b is rotatably attached to the first boom 11a. The tip attachment 11c is provided at the tip part of the first attachment 11 and is rotatably attached to the arm 11b. The end attachment 11c may be, for example, a bucket for scooping up earth and sand, a device for clamping objects (such as a grapple), or a device for crushing, excavating, etc. (such as a breaker).

[0013] The first boom hoist cylinder 13 raises and lowers the first boom 11a relative to the upper rotating body 30. The first boom hoist cylinder 13 is an extendable hydraulic cylinder. The base end of the first boom hoist cylinder 13 (the end attached to the upper rotating body 30, the hoist cylinder foot) is attached to the vertical plate portion side front attachment portion 31b2 of the vertical plate portion 31b described below. A plurality of first boom hoist cylinders 13 are provided, for example, two are provided (only one is shown in FIG. 1). The tip end of the first boom hoist cylinder 13 (the end opposite to the base end) is rotatably attached to the first boom 11a, for example, to the left and right side surfaces of the first boom 11a. Only one first boom hoist cylinder 13 may be provided. Below, a case in which two first boom hoist cylinders 13 are provided will be mainly described.

[0014] The second attachment 21 is an attachment that is provided when the work machine 1 is the second work machine 1B, as shown in Fig. 2. The second attachment 21 performs work, for example, lifting a load. For example, the second attachment 21 includes a second boom 21a. The second attachment 21 may include a jib (not shown) that is attached to the tip of the second boom 21a in a manner that allows it to be raised and lowered.

[0015] The second boom 21a is attached to the upper rotating body 30 (more specifically, to the adapter 40 described later) so as to be able to rise and fall. The second boom 21a is different from the first boom 11a (see FIG. 1). More specifically, the dimensions and shape of the second boom 21a are different from those of the first boom 11a. The base end of the second boom 21a is rotatably attached to a second boom foot attachment portion 63 (see FIG. 4) of the adapter 40 described later. The dimension (width) in the lateral direction Y of the base end (the end attached to the upper rotating body 30, the boom foot) of the second boom 21a is different from the dimension in the lateral direction Y of the base end of the first boom 11a (see FIG. 1). Details of the direction such as the "lateral direction Y" will be described later. The dimension in the lateral direction Y of the base end of the second boom 21a is narrower than the dimension in the lateral direction Y of the base end of the first boom 11a (see FIG. 1). For example, the second boom 21a has a multi-stage box-shaped structure and is extendable and contractible. It should be noted that the second boom 21a does not have to be extendable.

[0016] The second boom hoist cylinder 23 raises and lowers the second boom 21a relative to the upper rotating body 30. The second boom hoist cylinder 23 is an extendable hydraulic cylinder. The base end of the second boom hoist cylinder 23 (the end attached to the upper rotating body 30, the hoist cylinder foot) is rotatably attached to a second boom hoist cylinder attachment portion 64 (see FIG. 4) of the adapter 40, which will be described later. The tip end of the second boom hoist cylinder 23 (the end opposite to the base end) is rotatably attached to the ventral surface (underside) of the second boom 21a. Only one second boom hoist cylinder 23 may be provided, or multiple second boom hoist cylinders 23 may be provided. The following will mainly describe the case where only one second boom hoist cylinder 23 is provided.

[0017] The second boom mounted device 25 is a device mounted on the second boom 21a. The second boom mounted device 25 may include, for example, electronic equipment or hydraulic equipment (for example, hydraulic actuators, hydraulic valves, etc.). The second boom mounted device 25 may be mounted on the back surface (upper surface) of the second boom 21a, or may be provided inside (inner space) of the second boom 21a. Specifically, for example, the second boom mounted device 25 may include a hydraulic winch for winding up a rope, etc. This hydraulic winch may be mounted on the back surface of the second boom 21a. For example, the second boom mounted device 25 may include a hydraulic cylinder (not shown) for extending and retracting the second boom 21a. This hydraulic cylinder is provided inside the second boom 21a.

[0018] The upper rotating body 30 is attached to the lower traveling body 5 so as to be rotatable about a rotation center 30a (see FIG. 5). Either the first boom 11a (see FIG. 1) or the second boom 21a (referred to as "boom B") is attached to the upper rotating body 30. As shown in FIG. 5, the position of the rotation center 30a in the lateral direction Y is referred to as a rotation center lateral position 30ay. As shown in FIG. 3, the upper rotating body 30 includes a rotating frame 31, a cab 33, a guard 35, a hydraulic equipment room 37 (see FIG. 5), an adapter 40, and a space arrangement device 81.

[0019] (direction) As shown in FIG. 2, the direction in which the rotation axis (rotation center 30a (see FIG. 5)) of the upper rotating body 30 relative to the lower running body 5 extends is defined as the up-down direction Z. In the up-down direction Z, the side (direction) from the lower running body 5 toward the upper rotating body 30 is defined as the upper side Z1, and the opposite side is defined as the lower side Z2. The direction in which the rotation axis of the boom B for raising and lowering relative to the upper rotating body 30 extends is defined as the lateral direction Y (lateral direction Y of the revolving frame 31). As will be described later, as shown in FIG. 5, the cab 33 is disposed on one side (right or left) of the lateral direction Y relative to the boom B. In the lateral direction Y, the side on which the cab 33 is disposed relative to the boom B is defined as the cab side Y1, and the opposite side is defined as the anti-cab side Y2. The direction perpendicular to each of the up-down direction Z and the lateral direction Y is defined as the front-rear direction X. In the fore-and-aft direction X, the side where the boom B protrudes from the revolving frame 31 when the boom B is lowered is defined as the front side X1, and the opposite side is defined as the rear side X2.

[0020] The rotating frame 31 is attached to the lower running body 5 shown in Fig. 2 so as to be rotatable about a rotating center 30a (see Fig. 5). The rotating frame 31 supports the operator's cab 33, the guard 35, etc. from the lower side Z2. As shown in Fig. 3, the rotating frame 31 includes a bottom surface portion 31a, a vertical plate portion 31b, and a vertical plate portion inner plate portion 31bi. The bottom surface portion 31a constitutes the lower side Z2 portion of the rotating frame 31 (of the upper rotating body 30).

[0021] As shown in FIG. 1, the vertical plate portion 31b is configured to be able to mount the first boom 11a. The vertical plate portion 31b cannot directly mount the second boom 21a without the adapter 40 shown in FIG. 2. As shown in FIG. 5, the vertical plate portion 31b is provided on both sides (left and right) in the horizontal direction Y. The multiple vertical plate portions 31b are arranged at intervals from each other in the horizontal direction Y. The vertical plate portion 31b is, for example, substantially plate-shaped. The vertical plate portion 31b is arranged to extend in the front-rear direction X and the up-down direction Z. For example, the vertical plate portion 31b has a substantially triangular portion as viewed from the horizontal direction Y (see FIG. 2). As shown in FIG. 6, the center portions of the left and right vertical plate portions 31b in the horizontal direction Y (positions that coincide or substantially coincide with a horizontal center portion M1 described later) may or may not be shifted in the horizontal direction Y with respect to the swivel center horizontal position 30ay. For example, the center portions in the lateral direction Y of the left and right vertical plate portions 31b-31b (e.g., the lateral center portion M1) are offset toward the opposite side of the cab Y2 from the swivel center lateral position 30ay. The following mainly describes a case where the center portions in the lateral direction Y of the left and right vertical plate portions 31b-31b are offset from the swivel center 30a. The vertical plate portion 31b (more specifically, each of the left and right vertical plate portions 31b-31b) includes a vertical plate portion-side rear mounting portion 31b1 and a vertical plate portion-side front mounting portion 31b2, as shown in FIG.

[0022] 1, the vertical plate portion side rear mounting portion 31b1 is a portion to which the first boom 11a can be attached. More specifically, the vertical plate portion side rear mounting portion 31b1 is a portion to which the base end of the first boom 11a can be attached via a first boom foot pin Pa. For example, the vertical plate portion side rear mounting portion 31b1 is provided on the upper side Z1 portion of the vertical plate portion 31b. For example, the vertical plate portion side rear mounting portion 31b1 is a pin hole or the like that penetrates the vertical plate portion 31b in the horizontal direction Y (the same is true for the vertical plate portion side front mounting portion 31b2).

[0023] The vertical plate side front mounting portion 31b2 is a portion to which the first boom hoist cylinder 13 can be attached. More specifically, the vertical plate side front mounting portion 31b2 is a portion to which the base end of the first boom hoist cylinder 13 can be attached via the first boom hoist cylinder foot pin Pb. The vertical plate side front mounting portion 31b2 is, for example, located further forward X1 than the vertical plate side rear mounting portion 31b1, for example, located in the front X1 portion of the vertical plate portion 31b (for example, the front X1 end portion). The vertical plate side front mounting portion 31b2 is, for example, located lower Z2 than the vertical plate side rear mounting portion 31b1, for example, located near the bottom portion 31a.

[0024] The vertical plate portion inner plate portion 31bi (see Figure 7) is disposed so as to face the vertical plate portion front mounting portion 31b2 in the lateral direction Y. The base end of the first boom hoisting cylinder 13 is disposed so as to be sandwiched between the vertical plate portion 31b and the vertical plate portion inner plate portion 31bi (see Figure 7). The first boom hoisting cylinder foot pin Pb is attached to the vertical plate portion 31b and the vertical plate portion inner plate portion 31bi (see Figure 7).

[0025] The cab 33 is a portion where an operator can operate the work machine 1. The work machine 1 does not have to be operated by an operator who sits in the cab 33, and may be remotely operated or automatically operated. The cab 33 is mounted on the revolving frame 31. For example, the cab 33 is mounted on the front X1 portion of the revolving frame 31. The cab 33 is mounted on the cab side Y1 portion of the revolving frame 31 (see FIG. 7) (in the lateral direction Y, the side on which the cab 33 is provided with respect to the boom B is the "cab side Y1"). The cab 33 has a box-shaped structure, and is, for example, substantially rectangular parallelepiped-shaped. The cab 33 may be provided with a fence portion 33a.

[0026] The guard 35 covers the equipment mounted on the revolving frame 31. The guard 35 may include an engine guard (engine bonnet) that covers the engine (not shown). As shown in FIG. 5, the guard 35 may include a portion that covers the equipment in a hydraulic equipment room 37. The guard 35 is provided (mounted) on the revolving frame 31. The structure of the guard 35 can be set in various ways. For example, the guard 35 includes a rear guard 35a, an anti-cab side guard 35b, and an adapter rear opening 35c.

[0027] The rear guard 35a is provided on the rear side X2 of the upper rotating body 30. For example, the rear guard 35a is disposed directly behind the boom B and directly behind the cab 33. For example, the rear guard 35a includes a portion covering an engine (not shown). The anti-cab side guard 35b is a portion of the guard 35 that is closer to the anti-cab side Y2 than the end of the anti-cab side Y2 of the vertical plate portion 31b. For example, the anti-cab side guard 35b includes a portion covering the equipment of the hydraulic equipment room 37. For example, as shown in FIG. 7, the anti-cab side guard 35b includes an anti-cab side guard main body portion 35b1 and an anti-cab side guard protrusion portion 35b2. The anti-cab side guard main body portion 35b1 covers the equipment of the hydraulic equipment room 37. The anti-cab side guard protrusion portion 35b2 protrudes from the anti-cab side guard main body portion 35b1 to the upper side Z1. For example, the anti-driver's cab side guard protrusion 35b2 protrudes upwardly Z1 from a portion of the anti-driver's cab side Y2 of the anti-driver's cab side guard main body 35b1.

[0028] As shown in FIG. 5, the adapter rear opening 35c is an opening that allows work (such as maintenance) to be performed. More specifically, the adapter rear opening 35c is an opening that allows an operator to perform work on equipment arranged inside the guard 35 (inside the upper rotating body 30) from outside the guard 35. The adapter rear opening 35c is provided in the guard 35. The adapter rear opening 35c is arranged in the area A1. The area A1 is an area in the lateral direction Y, and is an area between both ends of the adapter 40 in the lateral direction Y. More specifically, the area A1 is an area on the anti-cab side Y2 of the end of the adapter 40 on the cab side Y1 and on the cab side Y1 of the end of the adapter 40 on the anti-cab side Y2. For example, when work on equipment inside the guard 35 is not performed, the adapter rear opening 35c may be closed with a part of the guard 35 (a cover, a lid). The equipment that can be operated through the adapter rear opening 35c may be, for example, a hydraulic equipment (including hydraulic piping) or equipment other than hydraulic equipment (such as electronic equipment). The hydraulic equipment that can be operated through the adapter rear opening 35c may be, for example, a swivel joint (not shown) that connects hydraulic piping between the upper rotating body 30 and the lower traveling body 5 (see FIG. 2), or a rotation motor (not shown) that rotates the upper rotating body 30 relative to the lower traveling body 5. Note that the guard 35 is also provided with an opening for operation other than the adapter rear opening 35c.

[0029] The hydraulic equipment room 37 is a portion in which hydraulic equipment is disposed. The hydraulic equipment room 37 is mounted on the revolving frame 31 (see FIG. 3). The hydraulic equipment room 37 is disposed on the anti-cab side Y2 of the adapter 40 (the opposite side of the adapter 40 from the cab 33). The hydraulic equipment room 37 is disposed inside the anti-cab side guard 35b (more specifically, the anti-cab side guard main body portion 35b1). The equipment disposed in the hydraulic equipment room 37 includes hydraulic equipment and may include, for example, hydraulic valves and may include hydraulic piping.

[0030] As shown in FIG. 2, the adapter 40 is a member (bracket) for attaching the second boom 21a to the revolving frame 31. The adapter 40 can be attached to the revolving frame 31 and to the vertical plate portion 31b. The second boom 21a can be attached to the adapter 40. The adapter 40 supports the second boom 21a so that the second boom 21a can be raised and lowered relative to the upper revolving body 30. The following mainly describes a state in which the adapter 40 is attached to the revolving frame 31. As shown in FIG. 4, the adapter 40 includes an adapter main body portion 50 and an attachment position adjustment member 70.

[0031] The adapter body 50 is a main body of the adapter 40. The adapter body 50 is a structure formed by combining, for example, plate-shaped members and block-shaped members. The configuration (shape, dimensions, etc.) of the adapter body 50 can be set in various ways. For example, the adapter body 50 includes an adapter lower member 51, an adapter intermediate member 53, and an adapter upper member 55.

[0032] The adapter lower member 51 can be attached to the vertical plate portion 31b. The adapter lower member 51 constitutes the lower Z2 portion of the adapter main body 50. As shown in Fig. 8, the adapter lower member 51 includes an adapter lower side portion 51a, an adapter lower connecting portion 51c (see Figs. 8 and 9), and an adapter lower protruding portion 51d.

[0033] The adapter lower side portions 51a constitute the outer portions of the adapter lower member 51 in the lateral direction Y. The adapter lower side portions 51a are provided on both sides (left and right) of the adapter lower member 51 in the lateral direction Y. The left and right adapter lower side portions 51a are arranged with a gap between them in the lateral direction Y. The adapter lower side portions 51a are arranged to extend in the up-down direction Z and the front-rear direction X. The adapter lower side portions 51a are, for example, plate-shaped (side plates).

[0034] The adapter lower connecting portion 51c connects the left and right adapter lower side portions 51a, 51a together. For example, the adapter lower connecting portion 51c is provided on the bottom surface portion and the front side X1 portion of the adapter lower member 51 (see Figs. 8 and 9). The adapter lower connecting portion 51c may include an adapter intermediate member 53. The adapter lower connecting portion 51c includes an adapter lower front portion 51c1. The adapter lower front portion 51c1 is provided on the front side X1 portion of the adapter lower member 51. The adapter lower front portion 51c1 is provided so as to extend in the up-down direction Z and the lateral direction Y. The adapter lower front portion 51c1 is, for example, plate-shaped (front plate).

[0035] The adapter lower protrusion 51d is a portion (bracket) on which the second boom hoisting cylinder attachment portion 64 is provided. The adapter lower protrusion 51d protrudes from the adapter lower front portion 51c1 toward the front side X1. For example, the adapter lower protrusion 51d is provided on both sides (left and right) in the lateral direction Y. The left and right adapter lower protrusions 51d·51d are arranged at an interval in the lateral direction Y. The adapter lower protrusion 51d is provided to extend in the up-down direction Z and the front-rear direction X. The adapter lower protrusion 51d is, for example, plate-shaped. The adapter lower protrusion 51d is arranged further inward in the lateral direction Y than the adapter lower side portion 51a (described later). The adapter lower member 51 may be provided with a boss portion, a reinforcing portion, etc. (the same applies to the adapter intermediate member 53 and the adapter upper member 55).

[0036] The adapter intermediate member 53 is connected to the adapter lower member 51 and the adapter upper member 55. The adapter intermediate member 53 is disposed in the center of the adapter main body 50 in the up-down direction Z. The adapter intermediate member 53 is connected to the upper Z1 portion of the adapter lower member 51. For example, the adapter intermediate member 53 is connected to the upper Z1 portion of the adapter lower side portion 51a. For example, the adapter intermediate member 53 is connected to the upper Z1 portion of the adapter lower connecting portion 51c, and is connected to the upper Z1 portion of the adapter lower front portion 51c1. The adapter intermediate member 53 is connected to the lower Z2 portion of the adapter upper member 55. For example, the adapter intermediate member 53 is connected to the lower Z2 portion of the adapter upper side portion 55a (described later). For example, the adapter intermediate member 53 is connected to the lower Z2 portion of the adapter upper connecting portion 55c (described later). The adapter intermediate member 53 is provided so as to extend in the lateral direction Y. The adapter intermediate member 53 is provided so as to extend in the front-rear direction X. As shown in FIG. 4, the adapter intermediate member 53 may be provided so as to extend in a direction inclined with respect to the front-rear direction X, for example, and may be provided so as to extend in a direction inclined with respect to the front-rear direction X so as to be disposed on the upper side Z1 toward the rear side X2. The adapter intermediate member 53 does not have to be inclined with respect to the front-rear direction X (it may be provided so as to extend in a direction that coincides with the front-rear direction X). The adapter intermediate member 53 is, for example, plate-shaped. As a modified example, the adapter intermediate member 53 may not be provided, and the adapter upper member 55 and the adapter lower member 51 may be continuous. Below, a case where the adapter intermediate member 53 is provided will be mainly described.

[0037] The adapter upper member 55 is capable of mounting the second boom 21a (see FIG. 3). The adapter upper member 55 is provided on the upper side Z1 of the adapter main body 50. Most of the adapter upper member 55 is provided on the upper side Z1 of the adapter lower member 51. Note that a part of the adapter upper member 55 may be disposed at the same position as the adapter lower member 51 in the up-down direction Z (may be at the same height), or may be disposed on the lower side Z2 of the adapter lower member 51. As shown in FIG. 8, the adapter upper member 55 includes an adapter upper side portion 55a and an adapter upper connecting portion 55c.

[0038] The adapter upper sides 55a can be positioned to sandwich the second boom 21a (see FIG. 3) in the lateral direction Y. The adapter upper sides 55a constitute the outer parts of the adapter upper member 55 in the lateral direction Y. The adapter upper sides 55a are provided on the outer sides (left and right) of the adapter upper member 55 in the lateral direction Y. The left and right adapter upper sides 55a are arranged with a gap between them in the lateral direction Y. The adapter upper sides 55a are provided to extend in the up-down direction Z and the front-rear direction X. The adapter upper sides 55a are, for example, plate-shaped (side panels).

[0039] As shown in FIG. 9, the adapter upper connection portion 55c connects the left and right adapter upper side portions 55a·55a. For example, the adapter upper connection portion 55c is disposed in the rear side X2 portion of the adapter upper member 55. The adapter intermediate member 53 may be the adapter upper connection portion 55c. The adapter upper connection portion 55c disposed in the rear side X2 portion of the adapter upper member 55 will be described below. For example, the adapter upper connection portion 55c is provided so as to extend in the lateral direction Y and the vertical direction Z. For example, the adapter upper connection portion 55c is plate-shaped. For example, as shown in FIG. 4, the adapter upper connection portion 55c may be provided so as to extend in a direction inclined with respect to the vertical direction Z, for example, so as to be disposed in a direction inclined with respect to the vertical direction Z so as to be located in the rear side X2 toward the upper side Z1. The adapter upper connection portion 55c does not have to be inclined with respect to the vertical direction Z (it may be provided so as to extend in a direction that coincides with the vertical direction Z). As shown in FIG. 9, the adaptor upper connection portion 55c includes an adaptor upper connection portion opening 55c1.

[0040] The adapter upper connection part opening 55c1 is an opening that allows work (such as maintenance) to be performed. The adapter upper connection part opening 55c1 is a portion that allows an operator on the rear side X2 of the adapter 40 to perform work on equipment arranged inside the adapter upper member 55. The adapter upper connection part opening 55c1 is a portion that allows an operator to perform work on equipment arranged near the rear side X2 part (for example, the rear side X2 end) of the second boom 21a (see FIG. 5). The adapter upper connection part opening 55c1 is provided, for example, in most of the adapter upper connection part 55c. For example, when work is not being performed, the adapter upper connection part opening 55c1 may be closed with a cover (lid) or the like. The equipment that can be worked on through the adapter upper connection part opening 55c1 may be equipment other than hydraulic equipment (such as electronic equipment) or may be hydraulic equipment. For example, this hydraulic equipment may be a hydraulic cylinder that extends and retracts the second boom 21a (see FIG. 5), or may be hydraulic piping.

[0041] The adapter side rear mounting portion 61 can be attached to the vertical plate portion side rear mounting portion 31b1 as shown in FIG. 4. More specifically, the adapter side rear mounting portion 61 can be attached to the vertical plate portion side rear mounting portion 31b1 via a rear mounting pin P1. As shown in FIG. 6, the adapter side rear mounting portion 61 is provided at two locations (left and right) spaced apart in the horizontal direction Y (the same is true for the adapter side front mounting portion 62, the second boom foot mounting portion 63 (see FIG. 9), and the second boom hoisting cylinder mounting portion 64 (see FIG. 8)). As shown in FIG. 8, the adapter side rear mounting portion 61 is provided on the adapter lower member 51. More specifically, the adapter side rear mounting portion 61 is provided on the left and right adapter lower side portions 51a·51a. The adapter side rear mounting portion 61 is provided, for example, on the rear side X2 portion of the adapter lower side portion 51a, for example, on the upper side Z1 portion of the adapter lower side portion 51a. As shown in Fig. 6, the left and right adapter-side rear mounting portions 61 (left and right adapter lower side portions 51a) are disposed between the left and right vertical plate portions 31b in the horizontal direction Y (on the inner side in the horizontal direction Y) (the same applies to the adapter-side front mounting portion 62). Specifically, for example, as shown in Fig. 8, the adapter-side rear mounting portion 61 is a hole penetrating the adapter lower side portion 51a in the horizontal direction Y (the same applies to the adapter-side front mounting portion 62). The adapter-side rear mounting portion 61 may be a hole to which the mounting position adjustment member 70 can be attached, or may be a pin hole (the same applies to the adapter-side front mounting portion 62).

[0042] The dimension of this adapter side rear mounting portion 61 in the horizontal direction Y is defined as width L1, as shown in Fig. 6. More specifically, width L1 is the distance in the horizontal direction Y between the left and right adapter side rear mounting portions 61. Width L1 is the distance in the horizontal direction Y between the outer ends (e.g., side surfaces) of the left and right adapter side rear mounting portions 61. Width L1 is approximately the same size as the distance in the horizontal direction Y between the left and right vertical plate portion side rear mounting portions 31b1.

[0043] The center of the adapter side rear mounting portion 61 in the horizontal direction Y is defined as the horizontal center M1. More specifically, the horizontal center M1 is the center of the left and right adapter side rear mounting portions 61 in the horizontal direction Y. The position of the horizontal center M1 coincides or substantially coincides with the center of the left and right vertical plate portions 31b in the horizontal direction Y (the same applies to the horizontal center M2 described later). The position of the horizontal center M1 coincides or substantially coincides with the center of the left and right vertical plate portion side rear mounting portions 31b1 in the horizontal direction Y. The horizontal center M1 is disposed at a position shifted in the horizontal direction Y from the swivel center lateral position 30ay (the same applies to the horizontal center M2). More specifically, the horizontal center M1 is disposed at a position shifted toward the opposite cab side Y2 from the swivel center lateral position 30ay (the same applies to the horizontal center M2). The reason for this shift is as follows. As shown in FIG. 5, by shifting the center portions in the lateral direction Y of the left and right vertical plate portions 31b toward the opposite cab side Y2 from the lateral position 30ay of the turning center, it is possible to ensure a wide width in the lateral direction Y of the cab 33 even if the width in the lateral direction Y of the upper turning body 30 is narrow. As a result of shifting the center portions in the lateral direction Y of the left and right vertical plate portions 31b toward the opposite cab side Y2, the lateral center portion M1 of the adapter-side rear mounting portion 61 shown in FIG. 6 is shifted toward the opposite cab side Y2 from the lateral position 30ay of the turning center. The position of the lateral center portion M1 does not have to be shifted in the lateral direction Y from the lateral position 30ay of the turning center. The position of the lateral center portion M1 may also be shifted toward the cab side Y1 from the lateral position 30ay of the turning center.

[0044] As shown in FIG. 4, the adapter-side front mounting portion 62 can be attached to the vertical-plate-side front mounting portion 31b2. More specifically, the adapter-side front mounting portion 62 can be attached to the vertical-plate-side front mounting portion 31b2 and the vertical-plate-side inner plate portion 31bi (see FIG. 7) via the front mounting pin P2. In the example shown in FIG. 4, the adapter-side front mounting portion 62 is attached to the vertical-plate-side front mounting portion 31b2 and the vertical-plate-side inner plate portion 31bi (see FIG. 7) via the mounting position adjustment member 70 and the front mounting pin P2. The adapter-side front mounting portion 62 is disposed, for example, on the front side X1 of the adapter-side rear mounting portion 61, and is disposed, for example, on the lower side Z2 of the adapter-side rear mounting portion 61. The adapter-side front mounting portion 62 is provided on the adapter lower member 51. More specifically, the adapter-side front mounting portion 62 is provided on the left and right adapter lower side portions 51a and 51a (see FIG. 8). The adapter side front attachment portion 62 is provided, for example, in a front side X1 portion of the adapter lower side portion 51a, for example, in a lower side Z2 portion of the adapter lower side portion 51a.

[0045] The adapter-side front mounting portion 62 and the adapter-side rear mounting portion 61 are attached to the vertical plate portion 31b2 and the vertical plate portion 31b1 of the vertical plate portion 31b. Therefore, the adapter 40 can be attached to the vertical plate portion 31b by utilizing the structure of the revolving frame 31 (the structure of the base machine) of the first working machine 1A (see FIG. 1).

[0046] The dimension of this adapter side front mounting portion 62 in the horizontal direction Y is defined as width L2, as shown in Fig. 6. More specifically, width L2 is the distance in the horizontal direction Y between the left and right adapter side front mounting portions 62. Width L2 is the distance in the horizontal direction Y between the outer ends (e.g., side surfaces) of the left and right adapter side front mounting portions 62. Width L2 is approximately the same size as the distance in the horizontal direction Y between the left and right vertical plate portion side front mounting portions 31b2. For example, width L2 is the same as or approximately the same as width L1.

[0047] The center of this adapter side front mounting portion 62 in the horizontal direction Y is referred to as the horizontal center portion M2. More specifically, the horizontal center portion M2 is the center of the left and right adapter side front mounting portions 62 in the horizontal direction Y. The horizontal center portion M2 coincides or approximately coincides with the horizontal center portion M1. The position of the horizontal center portion M2 coincides or approximately coincides with the center of the left and right vertical plate portion side front mounting portions 31b2 in the horizontal direction Y.

[0048] As shown in FIG. 3, the second boom foot mounting portion 63 can be attached to the base end of the second boom 21a. More specifically, the second boom foot mounting portion 63 can be attached to the base end of the second boom 21a via the second boom foot pin P3. As shown in FIG. 4, the second boom foot mounting portion 63 is disposed on the upper side Z1 of the adapter side rear mounting portion 61. The position of the second boom foot mounting portion 63 in the front-rear direction X is the same or approximately the same as the position of the adapter side rear mounting portion 61 in the front-rear direction X (described later). The left and right second boom foot mounting portions 63·63 shown in FIG. 6 can be disposed to sandwich the second boom 21a (see FIG. 5) from the lateral direction Y. As shown in FIG. 8, the second boom foot mounting portion 63 is provided on the adapter upper member 55. The second boom foot mounting portion 63 is provided on the adapter upper side 55a, for example, on the upper Z1 portion of the adapter upper side 55a, for example, on the rear X2 portion of the adapter upper side 55a (see FIG. 4). The second boom foot mounting portion 63 is, for example, a hole that passes through the adapter upper side 55a in the lateral direction Y, for example, a pin hole (the same is true for the second boom hoisting cylinder mounting portion 64).

[0049] The interval between the second boom foot mounting portions 63 in the lateral direction Y is set to be interval L3, as shown in Fig. 6. More specifically, interval L3 is the distance between the left and right second boom foot mounting portions 63 in the lateral direction Y. Interval L3 is the distance between the inner ends (e.g., faces) of the left and right second boom foot mounting portions 63 in the lateral direction Y. Interval L3 is approximately the same size as the width in the lateral direction Y of the base end portion of the second boom 21a (see Fig. 5). Interval L3 is narrower than width L1. Interval L3 is narrower than width L2.

[0050] The center of the second boom foot mounting portion 63 in the lateral direction Y is defined as the lateral center M3. More specifically, the lateral center M3 is the center of the left and right second boom foot mounting portions 63 in the lateral direction Y. The lateral center M3 is shifted (offset) in the lateral direction Y from the lateral center M1. The lateral center M3 is shifted in the lateral direction Y from the lateral center M2. It is preferable that the lateral center M3 is disposed closer to the lateral position 30ay of the turning center than the lateral center M1. In this case, the amount of shift of the lateral center M3 from the lateral position 30ay of the turning center is smaller than the amount of shift of the center of the left and right vertical plate portions 31b in the lateral direction Y (the position that coincides or approximately coincides with the lateral center M1) from the lateral position 30ay of the turning center. As a result, the balance in the lateral direction Y of the upper rotating body 30 is better when the second boom 21a (see FIG. 5) is attached to the second boom foot attachment portion 63 than when the first boom 11a (see FIG. 1) is attached to the vertical plate side rear attachment portion 31b1. More specifically, for example, the moment acting on the upper rotating body 30 about an axis passing through the rotation center 30a and extending in the front-rear direction X can be reduced. As a result, the difference between the left and right support reaction forces of the crawlers of the lower traveling body 5 (see FIG. 2) is reduced. Similarly, it is preferable that the lateral center portion M3 is disposed closer to the rotation center lateral position 30ay than the lateral center portion M2.

[0051] As shown in FIG. 2, the second boom hoist cylinder 23 can be attached to the second boom hoist cylinder mounting portion 64. More specifically, the base end of the second boom hoist cylinder 23 can be attached to the second boom hoist cylinder mounting portion 64 via the second boom hoist cylinder foot pin P4. As shown in FIG. 4, the second boom hoist cylinder mounting portion 64 is disposed, for example, on a higher side Z1 than the adapter side front mounting portion 62, and for example, on a further forward side X1 than the adapter side front mounting portion 62. The second boom hoist cylinder mounting portion 64 is disposed, for example, on a higher side X1 than the adapter side rear mounting portion 61, and for example, on a lower side Z2 than the adapter side rear mounting portion 61. The second boom hoist cylinder mounting portion 64 is provided on the adapter lower member 51, for example, on the adapter lower protrusion 51d. For example, the left and right second boom hoist cylinder mounting parts 64·64 shown in Figure 8 can be arranged to sandwich the base end of the second boom hoist cylinder 23 (see Figure 2) in the lateral direction Y. The base end of the second boom hoist cylinder 23 may have a bifurcated bracket, and the second boom hoist cylinder mounting part 64 may be arranged to be sandwiched between the bifurcated bracket. Only one second boom hoist cylinder mounting part 64 may be provided, and the adapter lower protrusion 51d may be in the form of a single plate. The following will mainly describe the case where left and right second boom hoist cylinder mounting parts 64·64 are provided.

[0052] This second boom hoist cylinder mounting part 64 is provided separately from the adapter side rear mounting part 61 and separately from the adapter side front mounting part 62. Therefore, the position of the second boom hoist cylinder mounting part 64 is not easily restricted by the positions of the adapter side rear mounting part 61 and the adapter side front mounting part 62 (there is a high degree of freedom in setting the position). As a result, it becomes possible to appropriately position the second boom hoist cylinder mounting part 64 (see Figure 8) depending on the capacity (e.g. lifting capacity) of the second work machine 1B shown in Figure 2, the operating range of the second boom 21a and the second boom hoist cylinder 23, the holding pressure of the second boom hoist cylinder 23, etc.

[0053] The distance between the second boom hoist cylinder mounting parts 64 in the lateral direction Y is set to L4, as shown in FIG. 6. More specifically, the distance L4 is the distance between the left and right second boom hoist cylinder mounting parts 64 in the lateral direction Y. The distance L4 is the distance between the inner ends (e.g., faces) of the left and right second boom hoist cylinder mounting parts 64 in the lateral direction Y. The left and right second boom hoist cylinder mounting parts 64 are positioned further inward in the lateral direction Y than the left and right adapter-side front mounting parts 62. The distance L4 is narrower than the width L2 of the adapter-side front mounting parts 62. As a result, as shown in FIG. 7, the second boom hoist cylinder foot pin P4 can be easily attached and detached. Here, consider the case where a structure (e.g., the operator's cab 33 or the guard 35) is present on the extension of the second boom hoist cylinder foot pin P4 when the second boom hoist cylinder foot pin P4 is removed. This structure (e.g., the cab 33 or the guard 35) is referred to as the "pin extension structure" of the second boom hoist cylinder foot pin P4. For example, if the second boom hoist cylinder foot pin P4 interferes with the pin extension structure, it may be necessary to disassemble the upper rotating body 30 (e.g., the cab 33 or the guard 35) extensively in order to attach or detach it. Alternatively, it may be necessary to change the shape of the pin extension structure (change it from the shape of the first work machine 1A (see FIG. 1)) so that the pin extension structure does not interfere with the second boom hoist cylinder foot pin P4. On the other hand, in this embodiment, as shown in FIG. 6, the interval L4 of the second boom hoist cylinder mounting parts 64 is narrower than the width L2 of the adapter-side front mounting part 62, which makes it easier to attach and detach the second boom hoist cylinder foot pin P4 shown in FIG. 7. For example, the second boom hoist cylinder foot pin P4 can be attached to and detached from the second boom hoist cylinder mounting part 64 without interfering with the pin extension structure.

[0054] The centre of this second boom hoisting cylinder mounting part 64 in the lateral direction Y is designated as lateral centre M4, as shown in Figure 6. More specifically, lateral centre M4 is the centre of the left and right second boom hoisting cylinder mounting parts 64, 64 in the lateral direction Y. For example, lateral centre M4 coincides or approximately coincides with lateral centre M3.

[0055] An example of the positional relationship between the adapter 40 and the like and the swivel center lateral position 30ay is as follows. For example, the swivel center lateral position 30ay is located more inward in the lateral direction Y than the left and right vertical plate portions 31b. The swivel center lateral position 30ay is located more inward in the lateral direction Y than the left and right adapter side rear mounting portions 61, for example, and more inward in the lateral direction Y than the left and right adapter side front mounting portions 62. The swivel center lateral position 30ay is located more inward in the lateral direction Y than the left and right second boom foot mounting portions 63. The swivel center lateral position 30ay is located more inward in the lateral direction Y than the left and right second boom hoisting cylinder mounting portions 64, for example.

[0056] The mounting position adjustment member 70 is a member that allows the adapter 40 shown in FIG. 4 to be easily mounted on the vertical plate portion 31b. The mounting position adjustment member 70 is a member that allows the adapter 40 to be mounted on the vertical plate portion 31b even if there is a difference between the distance between the vertical plate portion side rear mounting portion 31b1 and the vertical plate portion side front mounting portion 31b2 and the distance between the adapter side rear mounting portion 61 and the adapter side front mounting portion 62. For example, even if there is a manufacturing error in these distances, the mounting position adjustment member 70 allows the adapter 40 to be mounted on the vertical plate portion 31b (absorbs the error). More specifically, the mounting position adjustment member 70 allows the adapter 40 to be mounted on the vertical plate portion 31b as long as the difference is within the adjustable range of the mounting position adjustment member 70 (within the range of eccentricity described later). The mounting position adjustment member 70 is configured to adjust the mounting position of the adapter lower member 51 relative to the vertical plate portion 31b in a direction perpendicular to the horizontal direction Y (mounting positions in the up-down direction Z and the front-rear direction X). The mounting position adjustment member 70 is configured to adjust the mounting position of the adapter lower member 51 relative to the vertical plate portion 31b steplessly (continuously).

[0057] The mounting position adjustment member 70 is provided on at least one of the vertical plate portion 31b and the adapter 40. The mounting position adjustment member 70 may be provided on the vertical plate portion side rear mounting portion 31b1 or on the vertical plate portion side front mounting portion 31b2. The mounting position adjustment member 70 may be provided on the adapter side rear mounting portion 61 or on the adapter side front mounting portion 62. The following mainly describes the case where the mounting position adjustment member 70 is provided on the adapter side front mounting portion 62, that is, the case where the mounting position of the adapter side front mounting portion 62 relative to the vertical plate portion side front mounting portion 31b2 is adjustable.

[0058] The mounting position adjustment member 70 is provided on the adapter side front mounting portion 62 on both sides (left and right) in the horizontal direction Y, as shown in FIG. 8, for example. As described above, as shown in FIG. 6, the horizontal center portion M3 and the horizontal center portion M4 are shifted in the horizontal direction Y with respect to the horizontal center portion M1 and the horizontal center portion M2. Therefore, the center of gravity of the adapter 40 is shifted in the horizontal direction Y with respect to the center of the adapter 40 in the horizontal direction Y. Therefore, for example, when the adapter 40 shown in FIG. 7 is attached to the vertical plate portion 31b, if the adapter 40 is lifted up, the adapter 40 (more specifically, the adapter lower side portion 51a) will be inclined with respect to the up-down direction Z. As a result, it is expected that it will be difficult to align one side portion of the adapter 40 in the horizontal direction Y with the vertical plate portion 31b shown in FIG. 6. Specifically, it is assumed that it becomes difficult to align the adapter-side front mounting portion 62 on one side in the horizontal direction Y with the vertical-plate-side front mounting portion 31b2 on one side in the horizontal direction Y (for example, to align the center positions of the pin holes). As a result, it is assumed that it becomes difficult to insert the front mounting pin P2 into the vertical-plate-side front mounting portion 31b2, the vertical-plate-side inner plate portion 31bi, and the adapter-side front mounting portion 62 on one side in the horizontal direction Y. On the other hand, in the example shown in FIG. 8, the mounting position adjustment member 70 is attached to the adapter-side front mounting portions 62 on both sides (left and right) in the horizontal direction Y. In this case, the mounting positions of the left and right adapter-side front mounting portions 62·62 can be adjusted by the mounting position adjustment member 70 independently of each other. Therefore, the work of mounting (assembly) the adapter 40 to the vertical plate portion 31b (see FIG. 6) becomes easier. Specifically, for example, the mounting position adjustment member 70 is an eccentric bush or the like. In this example, as shown in FIG. 10, the attachment position adjustment member 70 includes a cylindrical portion 71, a hole portion 73, and a flange portion 75.

[0059] The tube portion 71 is inserted into a hole in the adapter-side front mounting portion 62. The tube portion 71 is cylindrical. The tube portion 71 is arranged so that the axial direction of the tube portion 71 is the horizontal direction Y. The hole portion 73 is a hole (inner peripheral surface of the tube portion 71) provided in the tube portion 71. As shown in FIG. 11, the central axis (hole central axis 73a) of the hole portion 73 is shifted (eccentric) in a direction perpendicular to the horizontal direction Y (at least one of the vertical direction Z and the front-rear direction X) with respect to the central axis (outer peripheral surface central axis 71a) of the outer peripheral surface of the tube portion 71. The mounting position adjustment member 70 is rotated around the outer peripheral surface central axis 71a, so that the position of the hole central axis 73a relative to the outer peripheral surface central axis 71a is adjusted. As shown in FIG. 10, the flange portion 75 is provided so as to extend from the tube portion 71 to the radially outward side of the tube portion 71. The flange portion 75 includes a tool insertion portion 75a. 11 is a portion into which a tool (not shown) for adjusting the position of hole central axis 73a relative to outer circumferential surface central axis 71a is inserted (attached). Specifically, for example, tool inserting portion 75a has a shape that is recessed (cutout shape) radially inward of flange portion 75 with respect to the outer circumferential surface of flange portion 75.

[0060] (Adapter side space S1) 6, the interval L3 is narrower than the width L1 (and the width L2), and the lateral center portion M3 is shifted in the lateral direction Y with respect to the lateral center portion M1 (and the lateral center portion M2). As a result, an adapter lateral space S1 is formed beside the adapter 40, as shown in FIG.

[0061] The adapter lateral space S1 is a space to the side of the adapter 40 (a region facing the adapter 40 in the lateral direction Y) and directly above the adapter lower member 51. More specifically, the adapter lateral space S1 is a space outside the adapter upper member 55 in the lateral direction Y and directly above the adapter lower member 51. The adapter lateral space S1 shown in FIG. 7 may be provided on the driver's cab side Y1 of the adapter upper member 55, or on the opposite driver's cab side Y2 of the adapter upper member 55. The following mainly describes the adapter lateral space S1 provided on the opposite driver's cab side Y2 of the adapter upper member 55. The adapter lateral space S1 can be used as a work space for an operator to perform work. This "work" may be work related to hydraulic equipment, work related to the second boom 21a (see FIG. 3), or work related to the second boom-mounted equipment 25 (see FIG. 3). The adapter lateral space S1 can be used as a space for arranging equipment. Equipment arranged in the adapter lateral space S1 is referred to as space-arranged equipment 81.

[0062] The spacing device 81 may include hydraulic equipment or may include equipment other than hydraulic equipment (such as electronic equipment). The spacing device 81 may be, for example, a pipe connected to the hydraulic equipment room 37, or may be, for example, a pipe connected to the second boom mounted device 25 (see FIG. 3). The spacing device 81 may be a device such as a valve, for example, a telescopic switching valve of the second boom 21a (see FIG. 3). The spacing device 81 may be attached to the adapter upper side portion 55a, or may be attached to the surface of the adapter upper side portion 55a on the opposite side Y2 of the cab. Here, if the adapter lateral space S1 is not provided, it may be necessary to arrange equipment in the internal space of the adapter 40 shown in FIG. 8 (more specifically, between the left and right adapter upper sides 55a and 55a, or between the left and right adapter lower sides 51a and 51a). However, as shown in Fig. 2, the space inside the adapter 40 is narrow due to the presence of the second boom 21a in a lowered position (for example, a traveling position) and the second boom hoisting cylinder 23, and it may be difficult to arrange equipment therein. On the other hand, in this embodiment, as shown in Fig. 7, the space arrangement equipment 81 can be arranged in the adapter lateral space S1. This reduces the need to arrange equipment in the space inside the adapter 40.

[0063] (Specific examples of the second boom mounting device 25 and the space arrangement device 81) In the example shown in Fig. 3, the second boom-mounted device 25 is a hydraulic winch. A plurality of hydraulic pipes (for example, two pipes for inflow and outflow) which are space-arranged devices 81 are connected to this hydraulic winch (only one pipe is shown in Fig. 3). When a plurality of hydraulic winches are provided, the number of hydraulic pipes further increases. Even when a plurality of hydraulic pipes are provided, these hydraulic pipes are arranged in the adapter side space S1 (see Fig. 7), so that the arrangement space for the hydraulic pipes can be easily secured.

[0064] (Position of adapter 40 in the front-rear direction X) As shown in Fig. 5, it is preferable that the end of the rear side X2 of the adapter 40 is disposed on the front side X1 of the end of the rear side X2 of the adapter rear opening 35c. In this case, the adapter rear opening 35c is prevented from being covered by the adapter 40. This makes it easier to work at the adapter rear opening 35c. This arrangement is particularly effective for the second work machine 1B (a small rear swing type machine) which has little space to place the equipment of the upper rotating body 30.

[0065] 3, the position of the second boom foot mounting portion 63 in the front-rear direction X is preferably the same as or approximately the same as the position of the adapter-side rear mounting portion 61 in the front-rear direction X. As a result, the rear side X2 portion of the adapter 40 is prevented from protruding too far toward the rear side X2 (too large overhang) relative to the position of the adapter-side rear mounting portion 61 in the front-rear direction X. For example, the rear side X2 end of the second boom foot mounting portion 63 is disposed on the rear side X2 of the front side X1 end of the adapter-side rear mounting portion 61. For example, the front side X1 end of the second boom foot mounting portion 63 is disposed on the front side X1 of the rear side X2 end of the adapter-side rear mounting portion 61.

[0066] As shown in FIG. 7, a case where a structure (e.g., the guard protrusion 35b2 on the opposite side to the driver's cab) is present on the extension of the second boom foot pin P3 when the second boom foot pin P3 is removed will be considered. If the guard protrusion 35b2 on the opposite side to the driver's cab interferes with the second boom foot pin P3, it becomes difficult or impossible to attach or detach the second boom foot pin P3. In the example shown in FIG. 5, the end of the guard protrusion 35b2 on the opposite side to the driver's cab Y1 is disposed in a rearward X2 portion of the position 35b3, closer to the driver's cab Y1 than in a forward X1 portion of the position 35b3. In such a case, if the position of the second boom foot pin P3 is too far rearward X2, the second boom foot pin P3 may interfere with the rear guard 35a. As a result, in order to attach or detach the second boom foot pin P3 shown in FIG. 7, a large-scale disassembly of the upper rotating body 30 (e.g., the rear guard 35a) may be required. In this embodiment, when the second boom foot pin P3 is attached or detached, the second boom foot pin P3 is prevented from interfering with a structure (such as the guard protrusion 35b2 on the side opposite to the driver's cab). This makes it easy to attach or detach the second boom foot pin P3.

[0067] As shown in FIG. 3, the position of the upper side Z1 end of the adapter 40 in the vertical direction Z is preferably the same position or a lower side Z2 with respect to the position of the upper side Z1 end of the cab 33 in the vertical direction Z. With this arrangement, the height of the second work machine 1B during transportation does not increase compared to the height of the first work machine 1A (see FIG. 1) during transportation. If the height of the first work machine 1A (see FIG. 1) during transportation is within the transportation limit height, the height of the second work machine 1B during transportation will also be within the transportation height. The above-mentioned "transportation limit height" is the limit value of the height of the vehicle carrying the work machine 1 when the work machine 1 (or the upper rotating body 30) is loaded onto a vehicle or the like and transported on a public road. Note that, if a fence section 33a is provided in the cab 33, the above-mentioned "upper side Z1 end of the cab 33" may be, for example, the upper side Z1 end of the fence section 33a.

[0068] (Effects of the first invention) The effects of the adapter 40 shown in FIG. 4 are as follows. The adapter 40 can be attached to the vertical plate portion 31b. As shown in FIG. 5, the vertical plate portions 31b are spaced apart from each other in the horizontal direction Y (the horizontal direction Y of the revolving frame 31), and the first boom 11a (see FIG. 1) can be attached to the adapter 40. The second boom 21a different from the first boom 11a can be attached to the adapter 40. As shown in FIG. 4, the adapter 40 includes an adapter lower member 51 and an adapter upper member 55. The adapter lower member 51 can be attached to the vertical plate portion 31b. The adapter upper member 55 is provided on the upper side Z1 of the adapter lower member 51, and the second boom 21a (see FIG. 3) can be attached to the adapter lower member 51. The adapter lower member 51 includes an adapter side rear mounting portion 61 and an adapter side front mounting portion 62. The adapter side rear mounting part 61 can be attached to a portion (vertical plate part side rear mounting part 31b1) of the vertical plate part 31b to which the first boom 11a (see FIG. 1) can be attached. The adapter side front mounting part 62 can be attached to a portion (vertical plate part side front mounting part 31b2) of the vertical plate part 31b to which the first boom hoisting cylinder 13 (see FIG. 1) for hoisting the first boom 11a (see FIG. 1) can be attached. The adapter upper member 55 includes a second boom foot mounting part 63. As shown in FIG. 3, the second boom foot mounting part 63 can be disposed so as to sandwich the second boom 21a from the lateral direction Y, and the base end part of the second boom 21a can be attached thereto.

[0069] 6, the spacing L3 in the lateral direction Y of the second boom foot mounting portion 63 is narrower than the width L1 in the lateral direction Y of the adapter side rear mounting portion 61. The center portion in the lateral direction Y of the second boom foot mounting portion 63 (lateral center portion M3) is shifted in the lateral direction Y with respect to the center portion in the lateral direction Y of the adapter side rear mounting portion 61 (lateral center portion M1).

[0070] In the above [Configuration 1], the second boom foot mounting portion 63 is shifted (offset) in the lateral direction Y (e.g., toward the cab Y1) with respect to the adapter side rear mounting portion 61. Therefore, as shown in FIG. 8, the adapter upper member 55 including the second boom foot mounting portion 63 is shifted in the lateral direction Y with respect to the adapter lower member 51 including the adapter side rear mounting portion 61. Therefore, a space (adapter lateral space S1) can be provided outside the adapter upper member 55 in the lateral direction Y and directly above the adapter lower member 51. As a result, a gap (adapter lateral space S1) between the structure of the upper rotating body 30 and the adapter 40 can be secured. As a result, the adapter lateral space S1 may be used, for example, as a work space or an arrangement space for equipment (space arrangement equipment 81 (see FIG. 7)).

[0071] (Effects of the second invention) [Configuration 2] The adapter 40 includes an adapter intermediate member 53. The adapter intermediate member 53 is connected to an upper Z1 portion of the adapter lower member 51 and a lower Z2 portion of the adapter upper member 55, and is provided to extend in the lateral direction Y.

[0072] With the above [Configuration 2], the position of the adapter lower member 51 in the lateral direction Y and the position of the adapter upper member 55 in the lateral direction Y can be set independently. Therefore, compared to a case where the adapter intermediate member 53 is not provided (for example, a case where the adapter upper side portion 55a and the adapter lower side portion 51a are continuous), it is possible to improve the degree of freedom in the amount of displacement of the second boom foot mounting portion 63 in the lateral direction Y relative to the adapter side rear mounting portion 61. Furthermore, with this configuration, even in a structure in which the adapter lower member 51 and the adapter upper member 55 are displaced in the lateral direction Y, it is easy to ensure the strength of the adapter 40.

[0073] (Effects of the third invention) [Configuration 3] The adapter lower member 51 is equipped with a second boom hoist cylinder mounting portion 64. As shown in Figure 2, the second boom hoist cylinder 23, which raises and lowers the second boom 21a, can be attached to the second boom hoist cylinder mounting portion 64. As shown in Figure 8, the second boom hoist cylinder mounting portion 64 is provided separately from the adapter side rear mounting portion 61 and the adapter side front mounting portion 62.

[0074] In the above [Configuration 3], the second boom hoist cylinder mounting portion 64 is provided independently of the adapter side rear mounting portion 61 and the adapter side front mounting portion 62. This improves the degree of freedom in the positioning of the second boom hoist cylinder mounting portion 64. As a result, the degree of freedom in the positioning of the second boom hoist cylinder 23 shown in FIG. 2 is improved. As a result, it becomes possible to appropriately position the second boom hoist cylinder mounting portion 64 depending on, for example, the lifting capacity of the second work machine 1B, the operating range of the second boom 21a and the second boom hoist cylinder 23, the holding pressure of the second boom hoist cylinder 23, etc.

[0075] (Effect of the fourth invention) [Configuration 4] As shown in FIG. 8, the second boom hoisting cylinder mounting portion 64 is disposed further inward in the lateral direction Y than the adapter side front mounting portion 62.

[0076] The above [Configuration 4] makes it possible to secure a larger space in the lateral direction Y outboard of the second boom hoist cylinder mounting part 64, compared to a case where the position of the second boom hoist cylinder mounting part 64 in the lateral direction Y is the same as the position of the adapter side front mounting part 62 in the lateral direction Y. As a result, for example, as shown in Figure 7, it is possible to easily secure space for attaching and detaching the second boom hoist cylinder foot pin P4. For example, it is possible to easily secure a clearance for the second boom hoist cylinder foot pin P4.

[0077] (Effect of the fifth aspect of the invention) [Configuration 5] As shown in Fig. 8, the adapter 40 includes an attachment position adjustment member 70. The attachment position adjustment member 70 is provided on at least one of the adapter side rear attachment part 61 and the adapter side front attachment part 62. The attachment position adjustment member 70 is an attachment position of the adapter lower member 51 relative to the vertical plate part 31b (see Fig. 4), and is configured to be able to adjust the attachment position in a direction perpendicular to the lateral direction Y.

[0078] The above [Configuration 5] provides the following effect. There may be a difference between the distance between the mounting parts on the vertical plate portion 31b side (vertical plate portion side rear mounting part 31b1, vertical plate portion side front mounting part 31b2) shown in Fig. 4 and the distance between the mounting parts on the adapter 40 side (adapter side rear mounting part 61, adapter side front mounting part 62). As long as this difference is within the range that can be adjusted by the mounting position adjustment member 70, the adapter 40 can be properly mounted to the vertical plate portion 31b even if there is this difference.

[0079] In the above [Configuration 5], the mounting position adjustment member 70 is attached to the adapter 40. Therefore, the mounting portions (vertical plate side rear mounting portion 31b1, vertical plate side front mounting portion 31b2) (e.g., pin holes) of the vertical plate portion 31b can be used as they are. For example, it is possible to eliminate the need to process or attach parts to the mounting portions (vertical plate side rear mounting portion 31b1, vertical plate side front mounting portion 31b2) of the vertical plate portion 31b.

[0080] (Effect of the sixth aspect of the invention) [Configuration 6] As shown in Fig. 2, the upper rotating body 30 includes an adapter 40 and a rotating frame 31. The rotating frame 31 can be attached to the lower traveling body 5 so as to be rotatable about a rotating center 30a (see Fig. 5). The adapter 40 is attached to the rotating frame 31.

[0081] The above [Configuration 6] makes it possible to obtain the effects of the above [Configuration 1] in the upper rotating body 30.

[0082] (Effects of the seventh aspect of the invention) [Configuration 7] As shown in Fig. 6, the center portion (lateral center portion M3) in the lateral direction Y of the mounting portion (second boom foot mounting portion 63) of the second boom 21a (see Fig. 5) of the adapter upper member 55 is disposed as follows: The lateral center portion M3 is disposed on the side closer to the rotation center 30a in the lateral direction Y (closer to the rotation center lateral position 30ay) than the center portion (lateral center portion M1) in the lateral direction Y of the adapter side rear mounting portion 61.

[0083] The above-mentioned [Configuration 7] provides the following advantages compared to when the lateral center part M3 is located at the same position as the lateral center part M1 or on the farther side than the lateral position of the rotation center 30ay: When the second boom 21a is attached to the adapter 40 shown in Fig. 5, the balance in the lateral direction Y of the upper rotating body 30 can be improved (details described above).

[0084] (Effect of the eighth aspect of the invention) 3, the upper rotating body 30 includes a cab 33 mounted on a rotating frame 31. The position of the end of the upper side Z1 of the adapter 40 in the vertical direction Z is the same position as or below the position of the end of the upper side Z1 of the cab 33 in the vertical direction Z.

[0085] With the above [Configuration 8], the height (length in the vertical direction Z) of the upper rotating body 30 can be made lower than when the end of the upper side Z1 of the adapter 40 is disposed on the upper side Z1 of the end of the upper side Z1 of the cab 33. For example, when the end of the upper side Z1 of the cab 33 fits within the transport restricted height, the end of the upper side Z1 of the adapter 40 can fit within the transport restricted height.

[0086] (Effect of the ninth aspect of the invention) 5, the upper rotating body 30 includes a guard 35 and an adapter rear opening 35c. The guard 35 is provided on the rotating frame 31 and covers the equipment mounted on the rotating frame 31. The adapter rear opening 35c is disposed in area A1 and is an opening provided in the guard 35. Area A1 is an area in the lateral direction Y, and is an area between both ends of the adapter 40 in the lateral direction Y.

[0087] [Configuration 9] The end of the rear side X2 of the adapter 40 is located on the front side X1 of the end of the rear side X2 of the adapter rear opening 35c.

[0088] The above [Configuration 9] prevents the adapter rear opening 35c from being covered by the adapter 40. As a result, for example, work through the adapter rear opening 35c becomes easier.

[0089] (Effect of the 10th Invention) [Configuration 10] As shown in Fig. 7, the upper rotating body 30 includes an operator's cab 33 mounted on a rotating frame 31, and a spacer 81. The spacer 81 is disposed in a space (adapter lateral space S1) on the opposite side of the adapter 40 from the operator's cab 33 and directly above the adapter lower member 51.

[0090] The above [Configuration 10] provides the following effects. In the above [Configuration 1], as shown in FIG. 6, the lateral center portion M3 is offset toward the opposite side Y2 of the driver's cab from the lateral center portion M1. Therefore, as shown in FIG. 7, the adapter lateral space S1 can be provided. In the above [Configuration 10], the space arrangement device 81 is arranged in this adapter lateral space S1. Therefore, the adapter lateral space S1 can be utilized.

[0091] (Effects of the eleventh aspect of the invention) [Configuration 11] The upper rotating body 30 includes a hydraulic equipment room 37 mounted on the rotating frame 31. The hydraulic equipment room 37 is disposed on the opposite side of the adapter 40 to the operator's cab 33 (the side Y2 opposite to the operator's cab).

[0092] According to the above [Configuration 10] and [Configuration 11], the adapter lateral space S1 is disposed near the hydraulic equipment chamber 37, and the spacing device 81 is disposed in the adapter lateral space S1. Therefore, the hydraulic equipment chamber 37 and the spacing device 81 can be disposed compactly.

[0093] (Modification) The above embodiment may be modified in various ways. For example, the configuration (e.g., arrangement, shape, etc.) of each component of the above embodiment may be changed. For example, the number of components may be changed, or some of the components may not be provided. For example, the components may be fixed or connected directly or indirectly to each other. For example, what has been described as multiple different members or parts may be treated as one member or part. For example, what has been described as one member or part may be provided as multiple different members or parts. [Explanation of symbols]

[0094] 5 Undercarriage 11a First Boom 13 No. 1 boom derrick cylinder 21a 2nd boom 23 No. 2 boom derrick cylinder 30 Upper rotating body 30a Center of rotation 31 Swivel Frame 31b Vertical plate part 33 Cab 35 Guard 35c Adapter rear opening 37 Hydraulic Equipment Room 40 Adapter 51 Adapter lower part 53 Adapter intermediate part 55 Adapter upper part 61 Adapter side rear mounting part 62 Adapter side front mounting part 63 Second boom foot attachment part 64 Second boom derrick cylinder attachment 70 Mounting position adjustment member 81 Space Layout Equipment Y Horizontal

Claims

1. An adapter that can be attached to vertical plate portions that are arranged at intervals from each other in a lateral direction of a revolving frame, to which a first boom can be attached, and to which a second boom different from the first boom can be attached, an adapter lower member that can be attached to the vertical plate portion; an adapter upper member provided above the adapter lower member and to which the second boom can be attached; Equipped with The adapter lower member includes: an adapter side rear attachment portion attachable to a portion of the vertical plate portion to which the first boom can be attached; an adapter side front mounting portion that can be attached to a portion of the vertical plate portion to which a first boom hoisting cylinder that hoists the first boom can be attached; Equipped with the adapter upper member includes a second boom foot attachment portion that can be disposed so as to sandwich the second boom from the lateral direction and to which a base end portion of the second boom can be attached, the lateral distance between the second boom foot mounting portions is narrower than the lateral width of the adapter side rear mounting portion, a lateral center portion of the second boom foot mounting portion is laterally shifted with respect to a lateral center portion of the adapter side rear mounting portion, adapter.

2. 2. The adapter of claim 1, an adapter intermediate member connected to an upper portion of the adapter lower member and a lower portion of the adapter upper member and extending in the lateral direction; adapter.

3. 3. The adapter according to claim 1 or 2, the adapter lower member includes a second boom hoist cylinder mounting portion to which a second boom hoist cylinder for raising and lowering the second boom can be attached, the second boom hoisting cylinder mounting portion is provided separately from the adapter side rear mounting portion and the adapter side front mounting portion. adapter.

4. 4. The adapter of claim 3, the second boom hoisting cylinder mounting portion is disposed laterally inward of the adapter-side front mounting portion, adapter.

5. The adapter according to any one of claims 1 to 4, a mounting position adjustment member provided on at least one of the adapter side rear mounting portion and the adapter side front mounting portion, The mounting position adjustment member is configured to adjust a mounting position of the adapter lower member relative to the vertical plate portion in a direction perpendicular to the lateral direction. adapter.

6. An adapter according to any one of claims 1 to 5; The swivel frame is attachable to a lower traveling body so as to be rotatable about a swivel center, and the adapter is attached to the swivel frame; Equipped with Upper rotating body.

7. The upper rotating body according to claim 6, a lateral center portion of the mounting portion of the second boom of the adapter upper member is disposed closer to the rotation center in the lateral direction than a lateral center portion of the adapter side rear mounting portion, Upper rotating body.

8. The upper rotating body according to claim 6 or 7, A cab is mounted on the rotating frame, The position of the upper end of the adapter in the vertical direction is the same position as or lower than the position of the upper end of the cab in the vertical direction. Upper rotating body.

9. The upper rotating body according to any one of claims 6 to 8, a guard provided on the rotating frame to cover equipment mounted on the rotating frame; an adapter rear opening, the adapter rear opening being an opening in the guard and located in the lateral region between both ends of the adapter in the lateral direction; Equipped with A rear end of the adapter is disposed forward of a rear end of the adapter rear opening. Upper rotating body.

10. The upper rotating body according to any one of claims 6 to 9, A cab mounted on the rotating frame; a space arrangement device disposed in a space directly above the adapter lower member on the opposite side of the cab with respect to the adapter; Equipped with Upper rotating body.

11. The upper rotating body according to claim 10, A hydraulic equipment room is mounted on the rotating frame, The hydraulic equipment room is disposed on the opposite side of the adapter from the operator's cab. Upper rotating body.

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