JP2024030037A - working machine hook block - Google Patents

Abstract

An object of the present invention is to provide a hook block for a working machine that can improve the ease of assembly when attaching brackets to adjacent plate members. A bracket 13 is provided on the side of the sheave 12 in the radial direction of the sheave 12. The bracket 13 is formed in a predetermined direction B between one or more plates 21 disposed at a position not facing the outer circumferential surface of the sheave 12, and an intermediate portion of the plates 21, and contacts the weight of the overwind prevention device from below. A contact surface that can be contacted, a mounting plate 23 to which one end of the plate 21 is fixed and extends in a predetermined direction B, and both ends of which are placed on the plate member 11, and one of the adjacent plate members 11. The pin 24 is inserted through a hole 11a formed in the plate 21, a hole 11a formed in the plate 21, and a hole 11a formed in the other of the adjacent plate members 11 in this order. The hoisting rope passes through the space between the plate 21 and the plate member 11 or the space between adjacent plates 21. [Selection diagram] Figure 4

Description

The present invention relates to a hook block for a working machine, which includes a member that collides with the weight of an overwind prevention device.

Patent Document 1 discloses a hook block for a working machine that has a bracket arranged between a pair of side plates. A hoisting rope is inserted between a pair of plates that the bracket has. An abutting surface that can abut the weight of the overwind prevention device from below is formed in the intermediate portion of the plate.

JP2022-65940A

In the hook block of Patent Document 1, when brackets are attached to adjacent side plates (plate members), the upper and lower ends of the plates are respectively fixed to the side plates. However, it is desired to further improve the ease of assembly.

An object of the present invention is to provide a hook block for a working machine that can improve the ease of assembly when attaching brackets to adjacent plate members.

The present invention includes a plurality of plate members arranged in a line in a predetermined direction so that their plate surfaces face each other, and a sheave pin arranged between the adjacent plate members and extending in the predetermined direction as an axis. one or more sheaves around which an upper rope is wound; and a bracket disposed on the side of the sheave in the radial direction of the sheave between the adjacent plate members, and the bracket one or more plates disposed at a position not facing the outer circumferential surface of the sheave in a predetermined direction; and an abutment surface formed at an intermediate portion of the plates and capable of abutting the weight of the overwind prevention device from below. a mounting plate having one end fixed to the plate, extending in the predetermined direction, and having both ends placed on the plate members; a hole formed in one of the adjacent plate members; a hole formed in a plate, and a pin inserted through a hole formed in the other of the adjacent plate members, and the hoisting rope is arranged in a space between the plate and the plate member, or It is characterized by passing through the space between the adjacent plates.

According to the present invention, both ends of the mounting plate of the bracket are respectively mounted on the plate members. The pin of the bracket is inserted through a hole formed in one of the adjacent plate members, a hole formed in the plate, and a hole formed in the other adjacent plate member in this order. Brackets can be attached to adjacent plate members by placing the mounting plate on the plate member and inserting pins into the plurality of holes. Therefore, unlike Patent Document 1, it is not necessary to fix the upper end and the lower end of the plate to the plate member, respectively. Thereby, it is possible to improve the ease of assembly when attaching the brackets to adjacent plate members.

It is a side view of a crane. FIG. 3 is a front view of the hook device. FIG. 2B is a view of FIG. 2A viewed from direction A. It is a perspective view of the bracket in a 1st embodiment. It is a perspective view of a hook block. It is a perspective view of the bracket in 2nd Embodiment. It is a perspective view of the bracket in a 3rd embodiment. FIG. 6A is a view of FIG. 6A viewed from direction C. It is a perspective view of the bracket in a 4th embodiment. FIG. 3 is a perspective view of a hook block in which four sheaves are arranged between two plate members. It is a perspective view of another hook block in which four sheaves are arranged between two plate members. A hook block in which four sheaves are placed between the two plate members in the center, two sheaves are placed between the two plate members on the left side, and between the two plate members on the right side. FIG. A hook block with five sheaves arranged between the two plate members in the center, three sheaves arranged between the two plate members on the left side, and between the two plate members on the right side. FIG.

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

[First embodiment]
(Crane configuration)
A hook block for a working machine in the first embodiment of the present invention is provided in a crane that is a working machine. As shown in FIG. 1, which is a side view of the crane 30, the crane 30 has a structure in which an upper rotating body 32 is rotatably mounted on a crawler-type lower traveling body 31. Note that the crane 30 may be a mobile crane that uses a moving means other than a crawler (for example, wheels), or may be a fixed crane that does not have a moving means. Further, the working machine is not limited to the crane 30.

The upper revolving body 32 includes a revolving frame 33, a boom 34, a gantry 36, a lower spreader 38, a hook winch (not shown), a boom hoisting winch (not shown), and a counterweight 39. have.

The swing frame 33 is attached to the undercarriage 31 via a swing bearing (not shown). The boom 34 is connected to the front part of the swing frame 33 so that it can rise and fall with respect to the swing frame 33. One end of a boom guy line 49 is connected to the tip of the boom 34.

A point sheave 41 is provided at the tip of the boom 34. A hook device 43 is suspended from this point sheave 41 via a hoisting rope 42. Alternatively, a jib may be attached to the tip of the boom 34, and the hook device 43 may be suspended from a point sheave 41 provided at the tip of the jib via a hoisting rope 42.

The gantry 36 is attached to the rear of the rotating frame 33. Note that a configuration may be adopted in which a mast is provided instead of the gantry 36. A lower spreader 38 is attached to the upper end of the gantry 36. A boom hoisting rope 51 is stretched between the lower spreader 38 and the upper spreader 50 connected to the other end of the boom guy line 49.

The hook winch and the boom hoisting winch are each arranged at the center of the revolving frame 33. The hook winch winds up or lets out the hoisting rope 42 to wind up or lower the hook device 43. The boom hoisting winch winds or lets out the boom hoisting rope 51 to hoist the boom 34 around the boom foot pin that is its fulcrum.

The counterweight 39 is mounted at the rear of the swing frame 33.

(Hook block configuration)
As shown in FIG. 2A, which is a front view of the hook device 43, and FIG. 2B, which is a view of FIG. 2A viewed from direction A, the hook device 43 includes a hook block 1 and a hook 2. . The hook device 43 of this embodiment is, for example, a 70t hook.

The hook block 1 has a plurality of plate members 11. As shown in FIG. 2B, in this embodiment, the number of plate members 11 is two. The two plate members 11 are arranged side by side in a predetermined direction B so that their plate surfaces face each other. A plurality of spacers 14 are arranged between the two plate members 11. The spacer 14 maintains a predetermined distance between the two plate members 11. The spacer 14 is hollow, and a pin (not shown) is inserted through the hole in one plate member 11, the spacer 14, and the hole in the other plate member 11 in this order, so that the two plate members are separated with the spacer 14 in between. 11 are connected to each other. As shown in FIG. 2A, four spacers 14 are provided side by side along the outer periphery of the lower half of the sheave 12, which will be described later.

A trunnion pin 15 and a sheave pin 16 are supported between the two plate members 11. The trunnion pin 15 is arranged at the lower end of the plate member 11 and extends in a predetermined direction B. The sheave pin 16 is arranged at the center of the plate member 11 and extends in a predetermined direction B. The hook 2 is rotatably and swingably supported by a trunnion pin 15.

Further, the hook block 1 has one or more sheaves 12. In this embodiment, the number of sheaves 12 is three. As shown in FIG. 2B, the three sheaves 12 are arranged between adjacent plate members 11, and each has a sheave pin 16 as its axis. A hoisting rope 42 is wrapped around each of the three sheaves 12.

As shown in FIG. 2A, the lower half of the sheave 12 is covered with a sheave guard 17. Four spacers 14 are attached to each sheave guard 17.

Further, the hook block 1 has a bracket 13. The bracket 13 is arranged on the side of the sheave 12 in the radial direction of the sheave 12 between adjacent plate members 11 .

(Bracket configuration)
As shown in FIG. 3, which is a perspective view of the bracket 13, the bracket 13 includes one or more plates 21, an abutment surface 22, a mounting plate 23, a pin 24, and an abutment member 25. ing.

In this embodiment, the number of plates 21 is two. As shown in FIG. 2B, each of the two plates 21 is disposed in a predetermined direction B at a position that does not face the outer peripheral surface of the sheave 12. Specifically, each of the two plates 21 is arranged between adjacent sheaves 12 in the predetermined direction B. As shown in FIG. 2A, the plate 21 extends diagonally so as not to interfere with the sheave 12. As shown in FIG. 3, the plate 21 is formed with a hole 21a through which the pin 24 passes.

As shown in FIG. 2B, the hoisting rope 42 wrapped around the central sheave 12 passes through the space between the adjacent plates 21. The hoisting rope 42, which is hung around the left and right sheaves 12, passes through the space between the plate 21 and the plate member 11. Therefore, the hoisting rope 42 is less likely to rub against the bracket 13. As a result, wear of the bracket 13, which is a member that collides with the weight of the overwind prevention device, can be suppressed. Thereby, the frequency of replacing the bracket 13 can be reduced.

As shown in FIG. 3, the contact surface 22 is formed at the middle portion of the plate 21. As shown in FIG. The contact surface 22 can contact a weight (not shown) of an overwinding prevention device from below.

The mounting plate 23 extends in a predetermined direction B. In this embodiment, the mounting plate 23 is plate-shaped, but is not limited to this, and may be rod-shaped or the like. One end (upper end) of each of the two plates 21 is fixed (welded) to the mounting plate 23 . The mounting plate 23 has an extending portion 23a extending in a direction perpendicular to the predetermined direction B and parallel to the upper surface of the plate member 11 (see FIG. 2B).

First, the plates 21 are welded to both ends of the plate-shaped connecting member 26, thereby integrating the two plates 21. Thereafter, the upper ends of each of the two plates 21 are welded from the extending portion 23a to the main body of the mounting plate 23. Note that the plate 21 and the mounting plate 23 may be integrally formed by casting, forging, machining, or the like. Both ends of the mounting plate 23 are placed on the plate member 11 (see FIG. 4). At this time, since the mounting plate 23 is plate-shaped, the mounting plate 23 comes into surface contact with the plate member 11.

In this embodiment, the thickness of the plate 21 is the same as the thickness of the mounting plate 23, but is not limited thereto. The thickness of the plate 21 may be increased or decreased depending on the distance between the sheaves 12.

As shown in FIG. 3, the pin 24 includes a hole 11a formed in one of the adjacent plate members 11 (see FIG. 4), a hole 21a formed in each of the two plates 21, and a hole 11a formed in one of the adjacent plate members 11 (see FIG. 4). The holes 11a (see FIG. 4) formed on the other side are inserted in this order. A hole 11a formed in the plate member 11 is for fixing a conventional striker. The striker is a member that can come into contact with the weight of the overwind prevention device from below, and in this embodiment, the plate 21 corresponds to this.

As shown in FIG. 3, a pair of contact members 25 are provided on the mounting plate 23. The contact member 25 extends from the mounting plate 23 in a direction perpendicular to the predetermined direction B and parallel to the upper surface of the plate member 11 (see FIG. 2B). The tip of the contact member 25 is bent toward the sheave 12 (downward). Each of the pair of abutting members 25 abuts the plate members 11 from inside the adjacent plate members 11 . That is, in the predetermined direction B, the distance from one outer surface to the other outer surface of the pair of contact members 25 is equal to or slightly shorter than the distance from one inner surface to the other inner surface of the two plate members 11.

In the above configuration, the brackets 13 are attached to adjacent plate members 11 in the following procedure. As shown in FIG. 4, which is a perspective view of the hook block 1, first, both ends of the mounting plate 23 are placed on the plate member 11, respectively. At this time, each of the abutting members 25 abuts against the adjacent plate members 11 from inside the adjacent plate members 11 . Next, the pins 24 are inserted into the holes 11a formed in one of the adjacent plate members 11, the holes 21a formed in each of the two plates 21, and the holes 11a formed in the other of the adjacent plate members 11, in this order. It is inserted. By the above procedure, the brackets 13 are attached to the adjacent plate members 11.

In this manner, the brackets 13 can be attached to adjacent plate members 11 by placing the mounting plate 23 on the plate member 11 and inserting the pins 24 into the plurality of holes. Therefore, unlike Patent Document 1, it is not necessary to fix the upper end and the lower end of the plate to the plate member 11, respectively. Thereby, it is possible to improve the ease of assembly when attaching the brackets 13 to adjacent plate members 11.

Moreover, since the mounting plate 23 is plate-shaped, the mounting plate 23 is in surface contact with the plate member 11. Thereby, rotation of the bracket 13 about the pin 24 can be suppressed.

Further, by bringing each of the contact members 25 into contact with the adjacent plate members 11 from inside the plate members 11, movement of the bracket 13 in the predetermined direction B can be prevented.

(effect)
As described above, according to the hook block 1 according to the present embodiment, both ends of the mounting plate 23 of the bracket 13 are mounted on the plate member 11, respectively. The pin 24 of the bracket 13 is inserted through a hole 11a formed in one of the adjacent plate members 11, a hole 21a formed in the plate 21, and a hole 11a formed in the other side of the adjacent plate member 11 in this order. The brackets 13 can be attached to adjacent plate members 11 by placing the mounting plate 23 on the plate member 11 and inserting the pins 24 into the plurality of holes. Therefore, unlike Patent Document 1, it is not necessary to fix the upper end and the lower end of the plate to the plate member, respectively. Thereby, it is possible to improve the ease of assembly when attaching the brackets 13 to adjacent plate members 11.

Moreover, the mounting plate 23 is plate-shaped. Therefore, the mounting plate 23 is in surface contact with the plate member 11. Thereby, rotation of the bracket 13 about the pin 24 can be suppressed.

Further, each of the pair of abutting members 25 provided on the mounting plate 23 abuts the plate members 11 from inside the adjacent plate members 11 . Thereby, movement of the bracket 13 in the predetermined direction B can be prevented.

[Second embodiment]
Next, a hook block according to a second embodiment will be described with reference to the drawings. Note that descriptions of configurations common to those of the first embodiment and effects achieved thereby will be omitted, and points that are different from the first embodiment will be mainly described. Note that the same members as in the first embodiment are given the same reference numerals as in the first embodiment.

(Bracket configuration)
As shown in FIG. 5, which is a perspective view of the bracket 113, the bracket 113 of this embodiment has the following configuration in addition to the configuration of the bracket 13 of the first embodiment. That is, the mounting plate 23 of the bracket 113 of this embodiment has an extending portion 23b extending in a direction perpendicular to the predetermined direction B and parallel to the upper surface of the plate member 11 (see FIG. 2B) at each of its both ends. have. In this embodiment, the direction in which the extension portion 23b extends is the direction in which the plate 21 extends, but it may extend in the opposite direction.

In this embodiment, since the mounting plate 23 is plate-shaped, the extending portion 23b is also plate-shaped. Therefore, the extending portion 23b comes into surface contact with the plate member 11. Thereby, rotation of the bracket 113 about the pin 24 can be further suppressed.

Since the other configurations are the same as those in the first embodiment, the explanation thereof will be omitted.

(effect)
As described above, according to the hook block 1 according to the present embodiment, the mounting plate 23 is provided at each of its both ends in a direction perpendicular to the predetermined direction B and in a direction parallel to the upper surface of the plate member 11. It has an extending portion 23b that extends. By bringing the extending portion 23b into contact with the plate member 11, rotation of the bracket 113 about the pin 24 can be suppressed.

[Third embodiment]
Next, a hook block according to a third embodiment will be described with reference to the drawings. Note that descriptions of configurations common to those of the first embodiment and effects achieved thereby will be omitted, and points that are different from the first embodiment will be mainly described. Note that the same members as in the first embodiment are given the same reference numerals as in the first embodiment.

(Bracket configuration)
In the bracket 13 of the first embodiment and the bracket 113 of the second embodiment, the pair of abutting members 25 are moved from the mounting plate 23 in a direction perpendicular to the predetermined direction B and parallel to the upper surface of the plate member 11. The distal end thereof was bent toward the sheave 12 (downward) (see FIGS. 3 and 5). On the other hand, in the bracket 213 of this embodiment, as shown in FIG. 6A, which is a perspective view of the bracket 213, and FIG. 6B, which is a view of FIG. 6A viewed from direction C, the pair of abutting members 225 are , one end (upper end) of which is fixed (welded) to the lower surface of the mounting plate 23 and extends toward the sheave 12 (downward in the figure). Note that the contact member 225 and the mounting plate 23 may be integrally formed by casting, forging, machining, or the like. Further, the contact member 225 may be formed by bending a part of the mounting plate 23.

Such a contact member 225 also contacts the plate members 11 from the inside of the adjacent plate members 11. Here, the side of the abutment member 225 opposite to the side that abuts the plate member 11 is welded so that the abutment between the abutment member 225 and the plate member 11 is not hindered.

In addition, in this embodiment, the plate thickness of the plate 21 is thicker than the plate thickness of the mounting plate 23. Therefore, in this embodiment, the connecting member 26 (see FIGS. 3 and 5) that connects the plates 21 to each other is not used. Further, in the present embodiment, the contact surface 22 is raised in a convex or semicircular shape toward the upper surface of the plate member 11 (upward in the figure), but the contact surface 22 is not limited to this. Furthermore, in this embodiment, the width of the contact surface 22 is the same as the thickness of the plate 21, but is not limited thereto.

The rest of the configuration is the same as that of the second embodiment, so the explanation thereof will be omitted.

[Fourth embodiment]
Next, a hook block according to a fourth embodiment will be described with reference to the drawings. Note that descriptions of configurations common to those of the first embodiment and effects achieved thereby will be omitted, and points that are different from the first embodiment will be mainly described. Note that the same members as in the first embodiment are given the same reference numerals as in the first embodiment.

(Bracket configuration)
In the bracket 13 of the first embodiment and the bracket 113 of the second embodiment, the pair of abutment members 25 extend from the mounting plate 23 in a direction perpendicular to the predetermined direction B and in a direction parallel to the upper surface of the plate member 11. It extended, and its tip was bent toward the sheave 12 (downward) (see FIGS. 3 and 5). On the other hand, in the bracket 313 of this embodiment, as shown in FIG. An extension portion 23b is provided. A portion of the extending portion 23b is bent toward the sheave 12, thereby forming an abutting member 325. Such a contact member 325 also contacts the plate members 11 from inside the adjacent plate members 11 .

By forming the abutting member 325 with a part of the extending portion 23b, there is no need to prepare an abutting member separate from the mounting plate 23, so the number of parts can be reduced. Moreover, since there is no need to fix an abutting member separate from the mounting plate 23 to the mounting plate 23, processing costs can be reduced.

The rest of the configuration is the same as that of the second embodiment, so the description thereof will be omitted.

(effect)
As described above, according to the hook block 1 according to the present embodiment, the contact member 325 is formed by bending a part of the mounting plate 23. Thereby, there is no need to prepare an abutment member separate from the mounting plate 23, so the number of parts can be reduced. Moreover, since there is no need to fix an abutting member separate from the mounting plate 23 to the mounting plate 23, processing costs can be reduced.

[Fifth embodiment]
Next, a hook block according to a fifth embodiment will be described with reference to the drawings. Note that descriptions of configurations common to those of the first embodiment and effects achieved thereby will be omitted, and points that are different from the first embodiment will be mainly described. Note that the same members as in the first embodiment are given the same reference numerals as in the first embodiment.

(Hook block configuration)
In the first to fourth embodiments, the hook block 1 had a configuration in which three sheaves 12 were arranged between two plate members 11. In contrast, the hook blocks 101, 201, 301, and 401 of this embodiment have different numbers of plate members 11 and sheaves 12, as shown in FIGS. 8 to 11, which are perspective views of the hook blocks. .

In the hook block 101 shown in FIG. 8 and the hook block 201 shown in FIG. 9, four sheaves 12 are arranged between two plate members 11. The hook device 43 equipped with the hook block 101 shown in FIG. 8 is, for example, a 100t hook. The hook device 43 equipped with the hook block 201 shown in FIG. 9 is, for example, a 150t hook. In the hook block 201 shown in FIG. 9, one sheave 12 is provided on the left and right sides in the predetermined direction B above the two plate members 11.

In the bracket 413 that these hook blocks 101, 201 have, the number of plates 21 is three. Each of the three plates 21 is arranged in a predetermined direction B at a position that does not face the outer peripheral surface of the sheave 12. A hoisting rope 42 (not shown) wrapped around each of the two center sheaves 12 passes through the space between adjacent plates 21. A hoisting rope 42 (not shown) wrapped around the left and right sheaves 12 passes through the space between the plate 21 and the plate member 11.

The hook block 301 shown in FIG. 10 has four plate members 11. Four sheaves 12 are arranged between the two central plate members 11. Further, two sheaves 12 are arranged between the two plate members 11 on the left side of the figure and between the two plate members 11 on the right side of the figure. The hook device 43 equipped with this hook block 301 is, for example, a 200t hook.

A trunnion pin 15 (see FIG. 2A) is supported between the two central plate members 11. That is, the hook 2 is supported between the two central plate members 11.

The bracket 513 of this hook block 301 is arranged between the two plate members 11 on the left side in the figure and between the two plate members 11 on the right side in the figure. Bracket 513 has one plate 21. This plate 21 is arranged between two sheaves 12 in a predetermined direction B. A hoisting rope 42 (not shown) wrapped around each of the two sheaves 12 passes through the space between the plate 21 and the plate member 11.

A hook block 401 shown in FIG. 11 has four plate members 11. Five sheaves 12 are arranged between the two central plate members 11. Furthermore, three sheaves 12 are arranged between the two plate members 11 on the left side of the figure and between the two plate members 11 on the right side of the figure. The hook device 43 equipped with this hook block 401 is, for example, a 250t hook.

A trunnion pin 15 (see FIG. 2A) is supported between the two central plate members 11. That is, the hook 2 is supported between the two central plate members 11.

The bracket 613 of this hook block 401 is arranged between the two plate members 11 on the left side in the figure and between the two plate members 11 on the right side in the figure. The bracket 613 has two plates 21. Each of the two plates 21 is arranged in a position not facing the outer circumferential surface of the sheave 12 in the predetermined direction B. A hoisting rope 42 (not shown) wrapped around the central sheave 12 passes through the space between adjacent plates 21. A hoisting rope 42 (not shown) wrapped around the left and right sheaves 12 passes through the space between the plate 21 and the plate member 11.

Note that the specific configuration of the brackets 413, 513, 613 of this embodiment may be any of the brackets 13, 113, 213, 313 of the first to fourth embodiments, except for the number of plates 21.

The other configurations are the same as those in the first to fourth embodiments, so their explanation will be omitted.

Although the embodiments of the present invention have been described above, they are merely illustrative examples and do not particularly limit the present invention, and the design of the specific configuration can be changed as appropriate. Further, the functions and effects described in the embodiments of the invention are merely a list of the most preferable functions and effects resulting from the present invention, and the functions and effects according to the present invention are described in the embodiments of the invention. It is not limited to what has been done.

1,101,201,301,401 Hook block 2 Hook 11 Plate member 12 Sheave 13,113,213,313,413,513,613 Bracket 14 Spacer 15 Trunnion pin 16 Sheave pin 17 Sheave guard 21 Plate 22 Contact surface 23 Placement Plate 23a Extension part 23b Extension part 24 Pin 25, 225, 325 Contact member 26 Connection member 30 Crane 31 Lower traveling body 32 Upper revolving body 33 Swivel frame 34 Boom 36 Gantry 38 Lower spreader 39 Counterweight 41 Point sheave 42 Hoisting Rope 43 Hook device 49 Boom guy line 50 Upper spreader 51 Boom hoisting rope

Claims (5)

a plurality of plate members arranged in a predetermined direction so that the plate surfaces face each other;
one or more sheaves arranged between the adjacent plate members and having a hoisting rope around the sheave pin extending in the predetermined direction;
a bracket disposed on a side of the sheave in a radial direction of the sheave between the adjacent plate members;
has
The bracket is
one or more plates arranged at positions not facing the outer peripheral surface of the sheave in the predetermined direction;
an abutment surface formed in the intermediate portion of the plate and capable of abutting the weight of the overwind prevention device from below;
a mounting plate having one end fixed to the plate, extending in the predetermined direction, and having both ends placed on the plate member;
a pin inserted through a hole formed in one of the adjacent plate members, a hole formed in the plate, and a hole formed in the other adjacent plate member;
has
A hook block for a working machine, wherein the hoisting rope passes through a space between the plate and the plate member or a space between adjacent plates. The hook block for a working machine according to claim 1, wherein the mounting plate is plate-shaped. 3. The mounting plate according to claim 1 or 2, wherein the mounting plate has an extending portion extending in a direction perpendicular to the predetermined direction and parallel to the upper surface of the plate member at each of its both ends. Hook block for working machines. The bracket is
The hook block for a working machine according to claim 1 or 2, characterized in that a pair of contact members are provided on the mounting plate and each has a contact member that contacts the adjacent plate members from inside the plate members. . The hook block for a working machine according to claim 4, wherein the abutting member is formed by bending a part of the mounting plate.

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