Hanging plate and working machine

Abstract

To provide a hanging plate that enables smoother operation of hook removal when a hook is removed, and a working machine including such a hanging plate.SOLUTION: A hanging plate attached to a working machine body and used to hang the working machine body by hooking a hook is provided. Regarding the plate, the hanging plate includes at least one elongated hole that penetrates the hanging plate in a thickness direction thereof and allows the insertion of an end portion of the hook. In the elongated hole, an opening area on a side closer to the working machine body is larger than an opening area on a side farther from the working machine body with an orthogonal line as a boundary. The orthogonal line passes through a midpoint of a longest line segment having a maximum length among line segments each connecting two points on a peripheral edge that defines an opening of the elongated hole, and it is orthogonal to the longest line segment.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a hanging plate and a work machine. [Background technology]

[0002] Conventionally, brush cutters equipped with a hanging plate attached to the brush cutter body have been known (see Patent Document 1). The hanging plate is used to hang the brush cutter body by attaching a hook connected to a harness worn by the operator. When in use, the brush cutter is held at an angle, with the cutting blade horizontal to the ground (see Patent Document 2). This hanging plate has a plurality of circular through-holes formed therein, but with through-holes of this shape, when removing the hooks, the tips of the hooks get caught on the periphery of the through-holes in the hanging plate, making them difficult to remove. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] U.S. Patent No. 5,090,839 [Patent Document 2] Japanese Patent Application Publication No. 2019-062880 Summary of the Invention [Problem to be solved by the invention]

[0004] In view of the above circumstances, the present invention provides a hanging plate that allows for smoother operation when removing a hook, and a work machine equipped with such a hanging plate. [Means for solving the problem]

[0005] According to one aspect of the present invention, there is provided a hanging plate that is attached to a work machine body and used to hang a hook to hang the work machine body. The hanging plate in this plate has at least one elongated hole that penetrates in its thickness direction and through which the tip of a hook can be inserted. The elongated hole has an opening area on the side closer to the work machine body that is larger than the opening area on the side farther from the work machine body, with the boundary being an orthogonal line that passes through the midpoint of the longest line segment that has the greatest length and is perpendicular to the longest line segment among line segments connecting two points on the periphery that define the opening.

[0006] According to this aspect, when the hook is removed, the operation can be performed more smoothly. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view of a brush cutter as an example of a working machine. [Figure 2] FIG. 2 is a perspective view of a suspension plate according to the first embodiment. [Figure 3] 3A and 3B are a side view and a rear view of the suspension plate shown in FIG. 2. [Figure 4] FIG. 10 is a side view showing the state of the suspension plate when the brush cutter body is suspended. [Figure 5] FIG. 2 is a schematic diagram showing the configuration of a long hole. [Figure 6] 10 is a schematic diagram showing the state of the slots when the brush cutter body is suspended. FIG. [Figure 7] 10A and 10B are schematic diagrams showing other configurations and arrangements of the slots. [Figure 8] 10A and 10B are schematic diagrams showing other shapes of the slots. [Figure 9] FIG. 10 is a side view of the suspension plate according to the second embodiment. [Figure 10] FIG. 10 is a diagram for explaining the erection direction of the hanging plate. [Figure 11] FIG. 2 is a schematic diagram showing the configuration of a long hole. DETAILED DESCRIPTION OF THE INVENTION

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. Various features shown in the following embodiments can be combined with each other. FIG. 1 is a perspective view of a brush cutter, which is an example of a working machine. In the following description, directions are specified by setting the x-axis, y-axis, and z-axis as shown in each figure. Therefore, the positive x-axis direction corresponds to the "tip side," and the negative x-axis direction corresponds to the "base side."

[0009] The brush cutter (working machine) 100 shown in FIG. 1 comprises a brush cutter body (working machine body) 10 and a hanging plate 1 attached to the brush cutter body 10. The brush cutter body 10 has a main body 20, an operating unit 30, a rotary blade 60, a pole 50 connecting the main body 20 and the rotary blade 60, and a rod portion (connecting portion) 40 provided on the outside of the pole 50 and connecting the main body 20 and the operating unit 30.

[0010] The main body 20 has a drive unit 201 and a casing 202 that houses the drive unit 201. The drive unit 201 may be configured as either an electric motor or an engine. The casing 202 may be configured from, for example, a metal material, a resin material, or the like. 1, the operating unit 30 is provided with a U-shaped handle 301 and a throttle lever 302. The operator grips the U-shaped handle 301 and operates the throttle lever 302 to rotate the rotary blade 60, allowing the rotary blade 60 to cut objects such as grass and shrubs.

[0011] The base end of rod portion 40 is connected to casing 202 of main body 20, and pole 50 is inserted into it. Rod portion 40 and pole 50 are each made of a tubular metal member or resin member, and drive transmission shaft 70 is inserted into pole 50. The tip of the drive transmission shaft 70 is connected to the rotary shaft 61 of the rotary blade 60. The base end of the drive transmission shaft 70 is connected to the output shaft (not shown) of the drive unit 201. The rotational drive force of the output shaft of the drive unit 201 is transmitted to the rotary blade 60 via the drive transmission shaft 70, thereby rotating the rotary blade 60. In addition, a fan-shaped cover 62 that covers the rotary blade 60 is provided at the tip of the pole 50. The cover 62 prevents pieces of cut grass, trees, and other objects from flying directly towards the worker.

[0012] When an electric motor is used as the prime mover (drive unit 201), the brush cutter body 10 has a built-in control board (not shown) that controls the operation of the electric motor. A processing element and a memory element are mounted on this control board. The arithmetic element may be, for example, a CPU (Central Processing Unit), an MPU (Micro Processing Unit), etc. The arithmetic element performs various functions related to the brush cutter body 10 by reading out predetermined programs stored in the memory element. In other words, the arithmetic element specifically performs information processing using software stored in the memory element. The number of arithmetic elements is not limited to one, and a plurality of arithmetic elements may be provided for each function, or a combination thereof may be used.

[0013] The memory element stores various pieces of information as defined above. This can be implemented as a storage device such as a solid state drive (SSD) that stores various programs related to the brush cutter body 10 executed by the processor, or as a memory such as random access memory (RAM) that stores information (arguments, arrays, etc.) temporarily required for program operations. The memory element also stores various programs and variables related to the brush cutter body 10 that are executed by the arithmetic element.

[0014] A hanging plate 1 is attached to the rod portion (connecting portion) 40 of the brush cutter body (working machine body) 10 so as to protrude on the same side as the U-shaped handle 301 and throttle lever 302. First Embodiment First, the suspension plate according to the first embodiment will be described. Fig. 2 is a perspective view of the hanging plate according to the first embodiment. Fig. 3 is a side view (a) and a rear view (b) of the hanging plate shown in Fig. 2. Fig. 4 is a side view showing the state of the hanging plate when the brush cutter body is hung from it. Fig. 5 is a schematic diagram showing the configuration of the elongated holes. Fig. 6 is a schematic diagram showing the state of the elongated holes when the brush cutter body is hung from it. Fig. 7 is a schematic diagram showing other configurations and arrangements of the elongated holes. Fig. 8 is a schematic diagram showing other shapes of the elongated holes.

[0015] As shown in FIG. 2, the hanging plate 1 has a horizontally long rectangular outer shape, and is used to hang a brush cutter body (working machine body) 10 by hanging a hook H thereon. The suspension plate 1 shown in FIGS. 2 and 3 has at least one (in this embodiment, multiple) elongated hole 2 that penetrates in its thickness direction (y-axis direction) and through which the tip H1 of the hook H can be inserted. In this embodiment, the multiple slots 2 include slots 2 with different lengths of the longest line segment ML (see FIG. 5 , described in detail below). More specifically, the multiple slots 2 alternate between first slots 2a, whose longest line segment ML has a first length, and second slots 2b, whose longest line segment ML has a second length that is shorter than the first length. This configuration makes it easier for the operator to distinguish the position of the first slot 2a or the second slot 2b that the operator is familiar with.

[0016] In this specification, the direction in which the multiple elongated holes 2 (first elongated holes 2a and second elongated holes 2b) are lined up is referred to as the arrangement direction. In this embodiment, the arrangement direction of the multiple elongated holes 2 is the longitudinal direction (x-axis direction) of the hanging plate 1. In this case, whether the hook H is hung on the first elongated hole 2a or the second elongated hole 2b to hang the brush cutter body 10, it is easy to balance the brush cutter body 10 in the front-to-rear direction, and the brush cutter 100 can be held stably. The first slot 2a and the second slot 2b have the same configuration except that the lengths of their longest line segments ML are different, and therefore will be described below as slot 2.

[0017] As shown in FIG. 5, each of the long holes 2 has an elliptical shape. Each slot 2 satisfies condition A, which states that the area S1 of the opening on the side closer to the brush cutter body 10 is larger than the area S2 of the opening on the side farther from the brush cutter body 10, with the boundary being an orthogonal line CL that passes through the midpoint MP of the longest line segment ML and is perpendicular to the longest line segment ML, among the line segments connecting two points on the periphery 22 that define the opening 21. By satisfying condition A, a large amount of play can be ensured between the periphery 22 of each slot 2 and the inserted hook H on the side closer to the brush cutter body 10. Therefore, when the hook H is moved vertically downward in the operation of removing it from the hanging plate 1, these are less likely to interfere with each other, making the operation smoother.

[0018] To explain in more detail the operation of removing the hook H from the hanging plate 1, it can be performed while the brush cutter body 10 is still hanging by the operator (mainly after work is completed), or it can be performed while the brush cutter body 10 is placed on the ground (mainly at the start of work). In this embodiment, a large amount of play is ensured between the periphery 22 of each slot 2 and the inserted hook H on the side of the slot 2 closest to the brush cutter body 10. Therefore, whether the brush cutter body 10 is in a suspended state (see FIGS. 4 and 6) or a placed state (see FIGS. 3 and 5), the hook H can move within a sufficient range in the vertical direction (the direction along the longest line segment ML in FIG. 6, and the direction along D2 in FIG. 5) from the apex of the distal portion 222 to the opposing position of the proximal portion 223. This allows the hook H to be easily attached to and detached from the hanging plate 1 without changing the position of the brush cutter body 10 or temporarily lowering the brush cutter body 10. The ratio of the opening area S2 to the opening area S1 (S2 / S1) is not particularly limited, but is preferably about 1.1 or more and 2 or less, more preferably about 1.2 or more and 1.8 or less, and even more preferably about 1.3 or more and 1.6 or less.

[0019] Specifically, as shown in Fig. 5, each slot 2 has a pair of straight portions 221 that face each other with the longest line segment ML interposed therebetween, and the distance between the pair of straight portions 221 increases from the side farther from the brush cutter body 10 to the side closer to the brush cutter body 10. In this case, the slot 2 having the above-mentioned relationship between the opening areas S1 and S2 can be formed with a relatively simple structure. This improves the workability of the slot 2 in the hanging plate 1. The ratio of the maximum distance LD to the minimum distance SD between the pair of straight portions 221 (LD / SD ratio) is preferably about 1.1 to 1.7, more preferably about 1.15 to 1.5, and even more preferably about 1.2 to 1.3. In this case, the size of each slot 2 can be prevented from becoming too large, and the above-mentioned effects can be further improved.

[0020] Here, the specific value of the minimum distance SD is preferably about 5 mm or more and 15 mm or less, more preferably about 7 mm or more and 13 mm or less, and even more preferably about 9 mm or more and 11 mm or less. The specific value of the maximum distance LD is preferably about 7 mm or more and 17 mm or less, more preferably about 9 mm or more and 15 mm or less, and even more preferably about 11 mm or more and 13 mm or less.

[0021] Each slot 2 has a distal portion 222 connecting the ends of the pair of straight portions 221 that are farther from the brush cutter body 10, and a proximal portion 223 connecting the ends that are closer to the brush cutter body 10. Preferably, at least the distal portion 222 has a shape that includes an arc. In this embodiment, the distal portion 222 has an arc shape as a whole, and the proximal portion 223 has a shape that resembles two arcs connected by a straight line. By providing the distal portion 222 with a shape that includes an arc, when the brush cutter body 10 is hung by hooking a hook H into each long hole 2, the hook H is positioned at the center of the arc-shaped portion. At this time, the hook H and the hanging plate 1 are in near-point contact, so even if the brush cutter body 10 swings back and forth (in the x-axis direction), the movement is centered around the hook H, making it easy to stabilize.

[0022] Furthermore, the longest line segment ML of each slot 2 is inclined relative to the longitudinal direction of the hanging plate 1, i.e., the arrangement direction of the multiple slots 2 (x-axis direction). When the brush cutter body 10 is suspended by hooking a hook H into one of the slots 2, the longest line segment ML of each slot 2 is aligned vertically to the ground. Specifically, if the distal portion 222 of each slot 2 is inclined toward the base end side (main body 20 side) of the brush cutter body 10 as in this embodiment, the brush cutter body 10 is likely to be inclined so that the rotary blade 60 is on the lower side when suspended. Therefore, when attaching or detaching the hook H, the operator can easily perform the operation without changing the position of the brush cutter body 10, even when the brush cutter body 10 is suspended. The angle θ formed by the longest line segment ML of each slot 2 and the direction D2 perpendicular to the longitudinal direction (x-axis direction) and thickness direction of the hanging plate 1 is preferably about 10° to 40°, more preferably about 15° to 35°, and even more preferably about 20° to 30°. In this case, the above-mentioned effect can be further improved.

[0023] It is preferable that some of the multiple long holes 2 are arranged so as to be offset in a direction perpendicular to the longitudinal direction (x-axis direction) and thickness direction of the hanging plate 1, i.e., in the short direction of the hanging plate 1. In this embodiment, as shown in Figures 2 and 3(a), the first long holes 2a and second long holes 2b that are alternately arranged are arranged so that their distal portions 222 sides are aligned and their proximal portions 223 are offset. This configuration also makes it easier for the worker to distinguish the position of the first elongated holes 2a or the second elongated holes 2b that they are familiar with. Furthermore, with this configuration, the first elongated holes 2a and the second elongated holes 2b can be arranged closer to each other than when the first elongated holes 2a are uniformly arranged and the intervals between the first elongated holes 2a are the same as in this embodiment, so the longitudinal length of the suspension plate 1 can also be designed to be shorter.

[0024] As shown in Figures 3(a) and 3(b), the hanging plate 1 has a main body 11 with a plurality of elongated holes 2, and a fixing part 12 connected to the main body 11 and fixed to the brush cutter body 10. Two through holes 121 are formed in the fixing part 12, passing through it in its thickness direction (y-axis direction). Each through hole 121 can be fitted with a fixing member (e.g., a bolt) for fixing the hanging plate 1 to the brush cutter body 10. 3(b), the thickness direction HD11 of the main body 11 and the thickness direction HD12 of the fixing portion 12 intersect. That is, the hanging plate 1 is bent or curved partway along its short side (height direction). This makes it easy to see the multiple long holes 2 from vertically above (z-axis direction). The angle between the thickness direction HD11 and the thickness direction HD12 is not particularly limited, but is preferably about 5° or more and 15° or less.

[0025] Furthermore, as shown in Figure 3(a), notches 3 are provided at predetermined intervals along the long side (end surface) of the hanging plate 1 on the side opposite the brush cutter body 10. In this embodiment, each notch 3 is provided to correspond to one of the first elongated holes 2a. By providing such notches 3, it becomes easier for the operator to distinguish the position of the first elongated hole 2a or the second elongated hole 2b, which the operator is familiar with. That is, each notch 3 functions as a marker that indicates the position of a specific slot 2a, 2b among the first slot 2a or the second slot 2b. Markers that perform this function are not limited to notches 3, but may also include multiple protrusions, ribs, stickers, colored portions, or combinations thereof.

[0026] Such a hanging plate 1 is attached to the operating part 30 side of the rod part (connecting part) 40 of the brush cutter body (work machine body) 10. In this case, whether the hook H is hooked into the first elongated hole 2a or the second elongated hole 2b to hang the brush cutter body 10, the brush cutter body 10 can be hung at a position closer to the center of gravity of the brush cutter body 10, making it easier to hold the brush cutter 100 more stably. In the above embodiment, the plurality of slots 2 alternately include first slots 2a and second slots 2b having different lengths of the longest line segment ML, and these are arranged with a shift in the longitudinal direction (arrangement direction) and the lateral direction perpendicular to the thickness direction, but other arrangements are also possible. Figures 7(a) and 7(b) are side views showing other configurations and arrangements of the slots, respectively.

[0027] In the example shown in FIG. 7(a), the longest line segments ML of all of the multiple slots 2 are the same length. That is, all of the multiple slots 2 are configured as first slots 2a. The example shown in FIG. 7(a) also provides the same effects and advantages as the example shown in FIG. 3(a) and other figures. However, as described above, the example shown in FIG. 3(a) and other figures makes it easier for the operator to distinguish the position of the first slot 2a or the second slot 2b that the operator is familiar with. In the example shown in Fig. 7(b), the multiple slots 2 alternate between first slots 2a and second slots 2b, and their longest line segments ML are substantially perpendicular to the longitudinal direction (x-axis direction) of the hanging plate 1 without inclining. However, as described above, according to the example shown in Fig. 3(a), for example, when the brush cutter body 10 is hung, it is easy to tilt the rotary blade 60 downward, which can further improve the operability of brush cutting with the brush cutter 100.

[0028] When the multiple slots 2 include slots 2 with different lengths of longest line segments ML, in addition to the first slot 2a and the second slot 2b, one or more types of slots with lengths different from the lengths of these longest line segments ML may be included, and the longest line segments ML of these slots 2 may or may not be inclined with respect to the longitudinal direction (x-axis direction) of the suspension plate 1. Furthermore, when the multiple slots 2 include slots 2 with different lengths of longest line segments ML, only one of the slots 2 may have a different length of longest line segment ML. Such a hanging plate 1 can be made of, for example, a metal material, a ceramic material, a hard resin material, or the like. The hook H may be provided at the tip of a shoulder strap worn by the worker, or at the bottom end of a vest worn by the worker.

[0029] The shape of the slot 2 is not limited to the shape shown in FIG. 5, but may also be a shape as shown in FIG. FIG. 8 is a side view showing another shape of the slot. In the example shown in FIG. 8(a), the proximal portion 223a of the slot 2 has a curved linear shape like three line segments connected together. In the example shown in FIG. 8(b), the portions facing each other across the longest line segment ML have curved portions 221a that are curved inward (arcuate). In the example shown in FIG. 8(c), the portions facing each other across the longest line segment ML have wavy curved portions 221b.

[0030] Second Embodiment Next, a suspension plate according to a second embodiment will be described. Fig. 9 is a side view of the suspension plate according to the second embodiment, Fig. 10 is a diagram for explaining the erection direction of the suspension plate, and Fig. 11 is a schematic diagram showing the configuration of the elongated hole. The following description of the suspension plate according to the second embodiment will focus on the differences from the suspension plate according to the first embodiment, and a description of the same points will be omitted. The suspension plate 1 according to the second embodiment is similar to the suspension plate 1 according to the first embodiment, except that the shape of the elongated holes is different.

[0031] As shown in Figure 9, the hanging plate 1 of the second embodiment, like the hanging plate 1 of the first embodiment, has a main body portion 11 having multiple long holes 2' and a fixing portion 12 connected to the main body portion 11 and fixed to the brush cutter main body 10. Two through holes 121 are formed in the fixing part 12, penetrating it in its thickness direction (y-axis direction). A fixing member (e.g., a bolt) for fixing the hanging plate 1′ to the brush cutter body 10 can be inserted through each through hole 121. Furthermore, the suspension plate 1 is bent or curved midway in its short side direction (height direction). Furthermore, on the side of the hanging plate 1 opposite to the brush cutter body 10, notches 3' are provided at predetermined intervals along the long side (end surface) thereof.

[0032] The multiple elongated holes 2' alternately include first elongated holes 2a' in which the length of the longest line segment ML' (described later) is a first length and second elongated holes 2b' in which the length of the longest line segment ML' is a second length that is shorter than the first length. As shown in FIG. 9, each of the elongated holes 2' has a shape like a right triangle with a rounded apex. 11, each slot 2' has a pair of straight sections 221' facing each other with a longest line segment ML' interposed therebetween, a distal section 222' connecting the ends of the pair of straight sections 221' that are farther from the brush cutter body 10, and a proximal section 223' connecting the ends that are closer to the brush cutter body 10. In this embodiment, too, the distal section 222' has an overall arc shape, and the proximal section 223' has a shape such that two arcs are connected by a straight line.

[0033] 11, each slot 2' satisfies condition B, which states that the opening area S1' on the side closer to the brush cutter body 10 is larger than the opening area S2' on the side farther from the brush cutter body 10, with the boundary being an orthogonal line CL' that passes through the midpoint MP' of the longest line segment ML' that has the greatest length in the erect direction of the hanging plate 1, among the line segments connecting two points on the periphery 22' that define the opening 21'. By satisfying condition B, it is possible to ensure a large amount of play between the periphery 22' of each slot 2' and the inserted hook H on the side closer to the brush cutter body 10 of each slot 2'. This makes it less likely for the hooks H to interfere with each other when removing the hooks H from the hanging plate 1, making the operation smoother.

[0034] Here, the erection direction of the hanging plate 1 refers to the direction away from the brush cutter body 10 and along the main surface MS of the hanging plate 1, as shown in Figure 10. Therefore, the erection direction of the hanging plate 1 (main body 11) is a direction that is slightly inclined with respect to the z-axis direction. Note that if the hanging plate 1 is not bent or curved partway along the short side direction (height direction), its erection direction is substantially along the z-axis direction. The ratio of the opening area S2' to the opening area S1' (S2' / S1') is not particularly limited, but is preferably 1.1 or more and 2 or less, more preferably 1.2 or more and 1.8 or less, and even more preferably 1.3 or more and 1.6 or less. The second embodiment also provides the same functions and effects as the first embodiment.

[0035] In the above embodiment, the number of slots 2 arranged in the suspension plate 1 is six or seven, but is not limited to this and may be one, two to five, or eight or more. In other words, the suspension plate 1 is required to have at least one slot 2. Also, at least one of the slots 2 may satisfy both the above conditions A and B. Furthermore, when the suspension plate has a plurality of slots 2, some of the slots 2 may satisfy both the above conditions A and B, and the remaining slots 2 may satisfy only one of the above conditions A and B. Furthermore, in the above embodiment, a brush cutter for cutting down an object has been described as a representative working machine, but the working machine is not limited to a brush cutter and may be, for example, a ground hedge, an edger, a ground trimmer, or the like. Furthermore, it may be provided in the following aspects.

[0036] (1) A hanging plate that is attached to a work machine body and used to hang the work machine body by hooking a hook onto it, the hanging plate having at least one long hole that penetrates in the thickness direction and through which the tip of the hook can be inserted, the long hole passing through the midpoint of the longest line segment that has the greatest length among the line segments connecting two points on the periphery that define the opening, and with an orthogonal line that is perpendicular to the longest line segment as the boundary, the opening area on the side closer to the work machine body is larger than the opening area on the side farther from the work machine body.

[0037] (2) A hanging plate as described in (1) above, wherein the long hole has a pair of straight portions that face each other via the longest line segment, and the distance between the pair of straight portions increases from the side farther from the work machine body to the side closer to the work machine body.

[0038] (3) The suspension plate according to (2) above, wherein the ratio of the maximum distance to the minimum distance between the pair of linear portions is 1.1 or more and 1.7 or less.

[0039] (4) In the hanging plate described in (2) or (3) above, the long hole has a distal portion connecting the ends of the pair of straight portions that are farther from the work machine body and a proximal portion connecting the ends that are closer to the work machine body, and at least the distal portion has a shape that includes a circular arc.

[0040] (5) The suspension plate according to any one of (1) to (4) above, wherein the longest line segment of the long hole is inclined with respect to the longitudinal direction of the suspension plate.

[0041] (6) The suspension plate according to (5) above, wherein the angle between the longest line segment of the long hole and a direction perpendicular to the longitudinal direction and the thickness direction is 10° or more and 40° or less.

[0042] (7) The suspension plate according to any one of (1) to (6) above, wherein the at least one elongated hole includes a plurality of the elongated holes.

[0043] (8) The suspension plate according to (7) above, wherein the direction in which the plurality of long holes are arranged is the longitudinal direction of the suspension plate.

[0044] (9) The suspension plate according to (7) or (8) above, wherein the longest line segments of all of the plurality of long holes have the same length.

[0045] (10) The suspension plate according to (9) above, wherein the plurality of elongated holes include elongated holes whose longest line segments have different lengths.

[0046] (11) A suspension plate according to (10) above, wherein the plurality of long holes alternately include first long holes in which the length of the longest line segment is a first length and second long holes in which the length of the longest line segment is a second length that is shorter than the first length.

[0047] (12) The suspension plate according to (10) or (11) above, wherein some of the plurality of long holes are arranged offset in a direction perpendicular to the longitudinal direction and the thickness direction of the suspension plate.

[0048] (13) A hanging plate according to any one of (1) to (12) above, wherein the hanging plate has a main body portion having the long hole and a fixing portion connected to the main body portion and fixed to the work machine main body, and the thickness direction of the main body portion and the thickness direction of the fixing portion intersect.

[0049] (14) A hanging plate that is attached to a work machine body and used to hang the work machine body by hooking a hook thereon, the hanging plate having at least one long hole that penetrates in the thickness direction thereof and through which the tip of the hook can be inserted, the long hole passing through the midpoint of the longest line segment that has the greatest length in the erect direction of the hanging plate among the line segments connecting two points on the periphery that define the opening, and with an orthogonal line perpendicular to the erect direction as the boundary, the opening area on the side closer to the work machine body is larger than the opening area on the side farther from the work machine body.

[0050] (15) A work machine comprising a work machine body and a hanging plate described in any one of (1) to (14) above, wherein the work machine body has a main body, an operating unit, and a connecting part that connects the main body and the operating unit, and the hanging plate is attached to the connecting part.

[0051] (16) In the work machine described in (15) above, the hanging plate is attached to the operating unit side of the connection portion.

[0052] (17) The work machine according to (15) or (16) above, wherein the work machine is a brush cutter that cuts brush on an object. Of course, this is not the case.

[0053] As described above, various embodiments of the present invention have been described, but these are presented as examples and do not limit the scope of the invention in any way. The novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. Such embodiments and their modifications are intended to be included within the scope and spirit of the invention, as well as within the scope of the inventions and their equivalents as set forth in the claims. For example, the hanging plate and the working machine may be configured by appropriately combining any of the configurations of the above-described embodiments. [Explanation of symbols]

[0054] 100: Brush cutter 1: Hanging plate MS: Main surface 11: Main body 12: Fixed part 121: Through hole 2, 2': Long hole 2a, 2a': First slot 2b, 2b': Second slot 21, 21': Opening 22, 22': Periphery 221, 221': Straight section 221a: Curved section 221b: Curved section 222, 222': distal part 223, 223': proximal part 223a: proximal part 3: Notch CL, CL': Orthogonal lines D2 :Direction HD11: Thickness direction HD12: Thickness direction ML, ML': longest line segment MP, MP': Midpoint S1, S1': Opening area S2, S2': Opening area SD: Minimum distance LD: Maximum distance θ: angle 10: Brush cutter body 20: Main body 201: Drive unit 202: Casing 30:Operation unit 301: U-shaped handle 302: Throttle lever 40: Rod 50: Paul 60: Rotary blade 61: Rotation axis 62: Cover 70: Drive transmission shaft H: Hook H1:Tip

Claims

1. A hanging plate attached to a work machine body and used to hang the work machine body by hanging a hook thereon, the hanging plate has at least one elongated hole that penetrates the hanging plate in a thickness direction and through which the tip of the hook can be inserted; The long hole has an opening area on the side closer to the work machine body that is larger than the opening area on the side farther from the work machine body, with the boundary being an orthogonal line that passes through the midpoint of the longest line segment that has the greatest length among the line segments connecting two points on the periphery that define the opening, and is perpendicular to the longest line segment.

2. 2. The suspension plate according to claim 1, the elongated hole has a pair of linear portions that face each other across the longest line segment, The distance between the pair of straight portions of the hanging plate increases from the side farther from the work machine body to the side closer to the work machine body.

3. The suspension plate according to claim 2, A suspension plate, wherein the ratio of the maximum distance to the minimum distance between the pair of straight portions is 1.1 or more and 1.7 or less.

4. The suspension plate according to claim 2, the elongated hole has a distal portion connecting ends of the pair of straight portions that are farther from the work machine body and a proximal portion connecting ends of the pair of straight portions that are closer to the work machine body, A suspension plate, wherein at least the distal portion has a shape that includes an arc.

5. 2. The suspension plate according to claim 1, A suspension plate, wherein the longest line segment of the elongated hole is inclined with respect to the longitudinal direction of the suspension plate.

6. The suspension plate according to claim 5, A hanging plate, wherein an angle formed between the longest line segment of the long hole and a direction perpendicular to the longitudinal direction and the thickness direction is 10° or more and 40° or less.

7. 2. The suspension plate according to claim 1, The at least one slot includes a plurality of the slots.

8. 8. The suspension plate according to claim 7, The hanging plate, wherein the direction in which the plurality of long holes are arranged is the longitudinal direction of the hanging plate.

9. 8. The suspension plate according to claim 7, A hanging plate, wherein all of the plurality of long holes have the same length of the longest line segment.

10. 10. The suspension plate according to claim 9, The plurality of elongated holes include elongated holes whose longest line segments have different lengths.

11. The suspension plate according to claim 10, The plurality of elongated holes alternately include first elongated holes in which the length of the longest line segment is a first length and second elongated holes in which the length of the longest line segment is a second length that is shorter than the first length.

12. The suspension plate according to claim 10, A suspension plate, wherein some of the plurality of long holes are arranged so as to be shifted in a direction perpendicular to the longitudinal direction and the thickness direction of the suspension plate.

13. 2. The suspension plate according to claim 1, The hanging plate has a main body portion having the long hole and a fixing portion connected to the main body portion and fixed to the work machine main body, A hanging plate, wherein the thickness direction of the main body portion and the thickness direction of the fixing portion intersect.

14. A hanging plate attached to a work machine body and used to hang the work machine body by hanging a hook thereon, the hanging plate has at least one elongated hole that penetrates the hanging plate in a thickness direction and through which the tip of the hook can be inserted; The long hole is a hanging plate in which the opening area on the side closer to the work machine body is larger than the opening area on the side farther from the work machine body, with the boundary being an orthogonal line that passes through the midpoint of the longest line segment that has the greatest length in the erection direction of the hanging plate, among the line segments connecting two points on the periphery that define the opening, and is perpendicular to the erection direction.

15. A work machine, A work machine comprising a work machine body and a hanging plate according to any one of claims 1 to 14, The work machine body has a main body, an operation unit, and a connection unit that connects the main body and the operation unit, The hanging plate is attached to the connection portion.

16. The work machine according to claim 15, The hanging plate is attached to the operating unit side of the connection portion.

17. The work machine according to claim 15, The work machine is a brush cutter that cuts brush on an object.

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