JP7415866B2 - work machine catch - Google Patents

Description

The disclosed technology relates to a catch for holding in a closed state a cover member that opens and closes a machine room provided in a working machine such as a hydraulic excavator.

This type of catch generally consists of a latching member and an operating member. By latching the operating member to the latching member, the cover member is held in a closed state.

Although it is a type without a spring, Patent Document 1 discloses a catch that holds an opening/closing cover that covers an upper opening of a machine room in a closed state. The catch is composed of a first member attached to the opening/closing cover, a lever hooked to the first member, and the like. The lever is rotatably supported by a pair of left and right L-shaped fittings. By bolting each of these L-shaped fittings to a predetermined pedestal, the lever is pivotally supported on the pedestal.

In order to prevent the lever from falling over a predetermined angle when the opening/closing cover is opened, a pedestal with the lever pivoted is installed at the back between the louvers, using the ventilation holes provided at the installation location. It is installed. The height of the louver is adjusted so that when the lever is tilted to a predetermined angle, it hits the tip of the louver and its rotation is restricted.

Japanese Patent Application Publication No. 2003-206551

In the case of the catch disclosed in Patent Document 1, since a ventilation hole is used, the places where it can be installed are limited. Moreover, the paint on the tip of the louver where the lever hits is peeling off. Therefore, it looks bad and there is a risk of rust.

Furthermore, it is necessary to install the pedestal at the back between the louvers, making it difficult to properly install the pedestal, such as adjusting the clearance. Furthermore, since each of the L-shaped fittings bolted to the pedestal is an independent component, it is not easy to properly attach each of them to the pedestal. For example, when attempting to firmly fasten an L-shaped metal fitting to a pedestal, the other L-shaped metal fitting rotates together with the lever, causing the position to shift.

Typically, covers for such work machines are large and heavy. Moreover, in the case of working machines, large vibrations and shocks are applied during work. Therefore, the catch is required to have a high degree of strength and rigidity to stably hold the large and heavy cover in a closed state even when subjected to such vibrations.

Therefore, the catch of the work machine itself is made of a sturdy structure, and strong force is required to open and close the catch. Therefore, during the opening operation, the lever tends to rotate vigorously, so in the catch of Patent Document 1, the paint on the lever and the louver peels off immediately, resulting in poor appearance. There is also a risk that the levers and louvers may become deformed. In particular, in the case of a spring catch, the elastic force of the spring is used to hold the cover in a closed state, so the lever is more likely to rotate more vigorously due to the repulsion of the elastic force.

The primary purpose of the disclosed technology is to provide a work machine catch that is easy to install and looks good.

The disclosed technology relates to a catch for holding in a closed state a cover member that opens and closes an opening formed in a panel in a working machine in which a machine room whose periphery is covered with a panel is installed.

The catch includes a hooking member disposed at a first attachment portion of either the cover member or the panel, and a second attachment portion of the other of the cover member or the panel so as to be latched to the hooking member. An operating member disposed at the attachment site. The operating member includes a bracket fixed to the second attachment portion, and a lever pivotally supported by the bracket.

The lever has one end pivotally supported by the bracket, and has a base end that rotates in both a closing direction in which it is latched to the latching member and an opening direction opposite to the closing direction, and It has a tip portion rotatably connected to the other end and latched to the latching member. The bracket has a pair of pivot supports that pivotally support the proximal end portion from both sides via a support shaft, and each of the pivot supports includes a support wall portion that supports an end portion of the support shaft, and a support wall portion that supports the end portion of the support shaft; and a mounting wall bent from the base end of the support wall and fastened to the second mounting portion.

The bracket further includes a connecting plate portion that is integrated with each of the pivot supports, and a rotation regulating portion that abuts when the base end portion rotates by a predetermined angle in the opening direction is in the connecting plate portion. It is set in.

That is, this catch is for holding in a closed state the cover member that opens and closes the machine room of the working machine. The operating member includes a bracket and a lever, and the cover member is held in a closed state by rotating the lever and latching its tip to the latching member.

The bracket includes a pair of pivot supports that are fastened to the second attachment portion and pivotally support the proximal end portion of the lever from both sides, and a connecting plate portion that is integrated with these pivot supports. That is, when fastening the bracket to the second attachment site, it is not necessary to fasten the pivot parts individually. Since each shaft support is integrated with the connecting plate part in a state in which it is placed at an appropriate position in advance, even if it is firmly fastened, it will not rotate along with it.

Therefore, each shaft support does not shift. There is no need to adjust the mounting position of each shaft support, and the bracket can be easily and appropriately mounted. Furthermore, by integrating each shaft support with the connecting plate portion, the strength and rigidity of the bracket can be improved.

Further, the connecting plate portion is provided with a rotation restricting portion that abuts when the base end portion of the lever rotates by a predetermined angle in the opening direction. Therefore, even if the lever rotates vigorously due to the opening operation, the base end portion thereof is prevented from rotating beyond a predetermined angle.

As a result, it is possible to prevent the lever from colliding with a panel or the like and causing the paint to peel off. There is a risk that the paint on the rotation restriction part and the part of the proximal end that abuts against the rotation restriction part may peel off, but it is difficult to see, so even if the paint peels off, the aesthetic appearance of the catch will be affected. damage can be suppressed.

Furthermore, since the lever can be held at a predetermined angle, the lever can be placed in a position where it does not get in the way of work or walking. Therefore, workability can also be improved.

The catch may also be configured such that the connecting plate portion includes a joint plate whose upper surface is joined to the lower surface of each of the mounting wall portions, and the rotation restriction portion is provided at an intermediate portion of the joint plate. good.

In this way, the connecting plate portion can be constructed by simply joining together the connecting plates that have undergone relatively simple processing. Moreover, the rotation restriction part is located below the base end, and when the operating member is viewed from the outside, the rotation restriction part is almost invisible.

Since the rotation regulating portion can receive the base end, damage and deformation of the base end can be suppressed. Therefore, the appearance and durability of the catch are improved.

The catch may also be configured such that the connecting plate portion includes a construction plate that connects one side edge of the pair of support wall portions, and the rotation restriction portion is configured by the construction plate.

In this way, the pair of shaft supports and the construction plate can be integrated by so-called can manufacturing sheet metal processing, and the bracket can be constructed from one metal fitting. Since the rotation regulating portion is constituted by the construction plate, it is possible to prevent the lever from colliding with a panel or the like and peeling off the paint.

According to the catch to which the disclosed technology is applied, it is not only easy to install, but also improves appearance and durability.

1 is a schematic diagram showing an example of a working machine according to an embodiment. FIG. 2 is a schematic perspective view of the main parts of the machine room as seen diagonally from above. Diagrams indicated by arrows indicate states during maintenance or the like. FIG. 3 is a schematic perspective view showing the appearance of the catch. FIG. 3 is a schematic cross-sectional view showing the structure of the catch. It is a schematic perspective view for explaining the structure of a bracket. (a) to (d) are schematic diagrams showing a series of operations for opening the catch. It is a schematic perspective view which shows the principal part of the catch of a 1st modification. It is a schematic perspective view which shows the principal part of the catch of a 2nd modification. It is a schematic plan view which shows the bracket of the catch of the 3rd modification before processing. It is a schematic top view which shows the bracket after processing of the catch of the 3rd modification.

Hereinafter, embodiments of the disclosed technology will be described in detail based on the drawings. However, the following description is essentially just an example, and does not limit the present invention, its applications, or its uses. The front and back, left and right, and up and down directions used in the description follow the illustrated arrows.

<Work machine 1>
1 and 2 show an example of a work machine to which the disclosed technology can be applied. This working machine is a hydraulic excavator 1, and a machine main body 3 for performing work is mounted on a lower traveling body 2 so as to be freely pivotable. This hydraulic excavator 1 corresponds to a medium- to large-sized model with an operating mass of about several tens of tons.

The lower traveling body 2 has a pair of crawlers 2a, 2a on both left and right sides thereof. The hydraulic excavator 1 travels by hydraulically controlling the drive of these crawlers 2a, 2a.

The machine body 3 has a table-shaped upper frame 3a. The upper frame 3a is rotatably supported by the lower traveling body 2. A cab 4, an attachment 5, a machine room 10, etc. are installed on the upper frame 3a. The cab 4 is a box-shaped operator's cab in which an operator operates the hydraulic excavator 1, and is installed at the front left corner of the upper frame 3a.

The attachment 5 is composed of a boom 5a, an arm 5b, a bucket 5c, etc., and is installed at the front central portion of the upper frame 3a. The attachment 5 is operated by hydraulic control of a hydraulic cylinder 5d to perform work such as excavation. In order to adjust the front-rear balance with the attachment 5, a heavy counterweight 6 is installed at the rear end of the upper frame 3a.

The machine room 10 consists of a box-shaped structure surrounded by a panel 11, and is installed in a wide area at the rear of the upper frame 3a. As shown in FIG. 2, in the case of this hydraulic excavator 1, the machine room 10 includes a rear machine room 10a extending left and right along the rear edge of the upper frame 3a, and a rear machine room 10a extending from the left end of the rear machine room 10a to the left side of the upper frame 3a. A side machine room 10b extends forward along the edge. Although not shown, an engine and a hydraulic pump are installed in the rear machine room 10a.

An opening 12 is formed at a predetermined location in the machine room 10 (specifically, at a predetermined location on the panel 11 covering the machine room 10) for maintenance and the like. In the case of this hydraulic excavator 1, as shown by arrows in FIG. 2, a main opening 12a is formed in the center portion of the rear machine room 10a in the left-right direction, which largely opens the upper surface of the rear machine room 10a. Further, the side machine room 10b is also formed with a sub-opening 12b that opens the side surface thereof.

The machine room 10 is provided with a cover member 13 that opens and closes these openings 12. In the case of this hydraulic excavator 1, the rear machine compartment 10a is provided with an upper opening/closing cover 13a that opens and closes the main opening 12a, and the side machine compartment 10b is provided with a side opening/closing cover 13b that opens and closes the sub opening 12b. ing. The rear edge of each of the upper opening/closing cover 13a and the side opening/closing cover 13b is rotatably supported via a hinge, and by swinging about the rear edge, the main opening 12a and the sub opening are opened. 12b each opens and closes.

A step plate 14 is installed in front of a portion of the rear machine room 10a where the main opening 12a is formed so as to extend in the front-rear and left-right directions. Further, an auxiliary step 15 is similarly installed inside the main opening 12a. Using the step plate 14 and the auxiliary step 15 as footholds, an operator ascends and descends to the upper part of the machine room 10 and performs maintenance work etc. through the main opening 12a and the sub-opening 12b.

Each of the main opening 12a and the sub-opening 12b is normally closed by an upper opening/closing cover 13a and a side opening/closing cover 13b, respectively, as shown in FIG. 2, except when working. In order to stably hold each of the upper opening/closing cover 13a and the side opening/closing cover 13b in a closed state, a spring catch 20 is installed on the outer surface of the machine room 10.

During work, the hydraulic excavator 1 moves up and down significantly and tilts. Strong vibrations are also added. Therefore, the spring catch 20 is made to be sturdy accordingly. In particular, the large and heavy spring catches 20 for the upper opening/closing cover 13a are installed at two locations on both sides of the front edge of the main opening 12a. A spring catch 20 for the side opening/closing cover 13b is installed at one location on the front edge of the sub-opening 12b.

<Spring catch 20>
The spring catches 20 for the top opening/closing cover 13a and for the side opening/closing cover 13b are the same. Here, the spring catch 20 for the upper opening/closing cover 13a will be explained as an example.

As shown in FIGS. 3A and 3B, the spring catch 20 is composed of a latching member 30 and an operating member 40. As shown in FIG. 2, the hanging member 30 is arranged at a predetermined position (first attachment site) on the outer surface of the front edge of the upper opening/closing cover 13a, and is fixed to the upper opening/closing cover 13a by fastening bolts. The operating member 40 is disposed at a predetermined position (second attachment site) on the outer surface of the panel 11 that constitutes the front edge of the main opening 12a so as to be latched onto the latching member 30, and is secured by fastening bolts. It is fixed to the panel 11.

The latching member 30 is made of one metal fitting and has a base 31 , an engaged portion 32 , and a latching portion 33 . The base portion 31 is a plate-shaped portion extending on both sides of the engaged portion 32 and the hooking portion 33, and long bolt holes 31a, 31a are formed symmetrically in each of the base portions. Bolts inserted into these long bolt holes 31a, 31a are fastened to the upper opening/closing cover 13a.

The engaged portion 32 is a platform-shaped portion that is formed one step higher than the base portion 31 . The engaged portion 32 is provided at one end of the base portion 31 . An engagement hole 32 a is formed in the upper surface of the engaged portion 32 .

The latching portion 33 includes a pair of opposing walls 33a, 33a extending upward from the other end of the base 31 and facing each other, and a latching rod 33b installed at the tip of the opposing walls 33a, 33a. It consists of The hanging rod 33b is located above the upper surface of the engaged portion 32. The latching portion 33 is arranged on the upper opening/closing cover 13a such that the latching portion 33 is located closer to the operating member 40 than the engaged portion 32.

On the other hand, the operating member 40 includes a bracket 41 fixed to the panel 11 and a lever 42 pivotally supported by the bracket 41. The lever 42 further has a proximal end 50 and a distal end 60. The base end portion 50 includes a first metal fitting 51, a connecting rod 52, a second metal fitting 53, a spring 54, and the like.

(Lever 42)
The first metal fitting 51 is a portion that pivotally supports the base end portion 50 on the bracket 41, and is made of a so-called can manufacturing sheet metal product. The first metal fitting 51 includes a rectangular main wall 51a, a pair of rectangular opposing walls 51b, 51b bent from one opposite side of the main wall 51a and facing each other, and the other opposite side of the main wall 51a. It has a rectangular sub-wall 51c which is bent from one side between the opposing walls 51b, 51b and whose edges on both sides are connected to the edges of the opposing walls 51b, 51b.

A penetrating first shaft hole 51d is formed in each of the opposing walls 51b. The first support shafts 50a are rotatably inserted into these first shaft holes 51d and protrude from both sides of each opposing wall 51b. A tip end portion of the first support shaft 50a is pivotally supported by the bracket 41.

A first rod hole 51e through which the connecting rod 52 is inserted is formed in the center of the main wall 51a. The connecting rod 52 is made of a bolt-like member and has a cylindrical support, a head having a larger diameter than the support provided at one end, and a threaded portion provided at the other end. The connecting rod 52 is inserted into the first rod hole 51e with its head housed between the opposing walls 51b, 51b.

The second metal fitting 53 is the main part of the base end portion 50, and is made of a so-called can manufacturing sheet metal product. The second metal fitting 53 has a hollow prismatic metal fitting main body 53a with one side surface and one end surface open, and a pair of support arms 53b, 53b. The pair of support arms 53b, 53b are formed by extending a pair of opposing side surfaces toward the open end surface. A second bearing hole 53d is formed at the tip of each support arm 53b.

A second rod hole 53c is formed in the other end surface of the metal fitting body 53a. The connecting rod 52 protruding from the first rod hole 51e is inserted into the second rod hole 53c, so that the connecting rod 52 is housed inside the metal fitting main body 53a. A coil-shaped spring 54, which is shorter than the connecting rod 52, is attached to the connecting rod 52 housed in the metal fitting body 53a. A bolt 56 is fastened to the threaded portion of the connecting rod 52 via a washer 55.

Thereby, the spring 54 is held between the washer 55 and the end surface of the metal fitting main body 53a. The first metal fitting 51 and the second metal fitting 53, which are connected via the connecting rod 52, are expandable and retractable. That is, the second metal fitting 53 can be brought closer to the first metal fitting 51 without being subjected to the elastic force of the spring 54, and the base end portion 50 can be shortened.

On the other hand, when the second metal fitting 53 is moved far away from the first metal fitting 51, the elastic force of the spring 54 acts. Therefore, when extending the proximal end portion 50 beyond a predetermined length, it is necessary to pull it against the elastic force of the spring 54.

The tip portion 60 is made of a metal member and includes a grip 61, an engaging protrusion 62, a hook 63, a bearing 64, and the like. A second support shaft 65 is rotatably inserted into the bearing 64, and the protruding end portions of the second support shaft 65 protruding from both sides of the bearing 64 are inserted into the respective second bearing holes 53d in a manner that they are not removed. has been done. Thereby, the distal end portion 60 rotates relative to the proximal end portion 50 around the second support shaft 65 .

An engaging protrusion 62 is provided on the distal end side of the bearing 64. The engagement protrusion 62 is a cylindrical portion and is formed to engage with the engagement hole 32a. The grip 61 is provided so as to protrude further toward the distal end than the engagement protrusion 62 . The grip 61 has a shape slightly curved toward the engagement protrusion 62 .

The hook 63 is provided so as to protrude from the bearing 64 in a direction opposite to the grip 61, and a recess 63a having a U-shape in side view is formed at its tip. In the closed state, the latching rod 33b enters into this recess 63a.

(bracket 41)
The bracket 41 has a pair of pivot supports 70, 70. The base end portion 50 is pivotally supported from both sides by these pivot supports 70, 70 via the first support shaft 50a. Each shaft support 70 is made of an L-shaped metal fitting, and includes a support wall portion 71 in which a first bearing hole 71a is formed, and a mounting wall portion 72 that is bent from the base end of the support wall portion 71 and fastened to the panel 11. have.

An end portion of each first support shaft 50a is supported in each first bearing hole 71a in a state where it is prevented from coming off. Thereby, the lever 42 rotates relative to the bracket 41 around the first support shaft 50a. Specifically, the first metal fitting 51 of the proximal end portion 50 is pivotally supported by the bracket 41, and can be rotated in the closing direction (the direction in which it is latched to the latching member 30) and the opening direction (the direction opposite to the closing direction). Rotate in both directions. Each mounting wall portion 72 is formed with a bolt hole 72a through which a bolt is inserted.

As shown in FIG. 4, this bracket 41 further includes a connecting plate 80 (connecting plate part) that is integrated with each of the shaft supports 70, 70. The joint plate 80 is made of a so-called can-manufactured sheet metal product, and has a pair of joint parts 81, 81 located at a predetermined interval, and a connecting part 82 continuous between the joint parts 81, 81. Each joint 81 has substantially the same shape and dimensions as the mounting wall 72 of each shaft support 70, and has a bolt pilot hole 81a formed therein that overlaps the bolt hole 72a.

Each shaft support 70 is configured integrally with the joint plate 80 by overlapping and joining (welding) the upper surface of each joint portion 81 to the lower surface of each mounting wall portion 72 of each shaft support 70 . Each shaft support 70 is placed in an appropriate position in advance and is integrated with the joint plate 80, so when fixing the bracket 41 to the panel 11, even if the bolts are firmly tightened, the I don't go around.

Therefore, each shaft support 70 does not shift or move. There is no need to adjust the mounting position of each shaft support 70, and the bracket 41 can be easily and appropriately mounted. Furthermore, by integrating each shaft support 70 with the joint plate 80, the strength and rigidity of the bracket 41 can be improved.

Further, by using the connecting portion 82, when the lever 42 is opened and operated, it is possible to prevent the lever 42 from abutting against the panel 11 or the like. That is, the connecting portion 82 is provided with a rotation regulating portion that abuts when the base end portion 50 rotates by a predetermined angle in the opening direction.

Specifically, the connecting portion 82 includes a first portion 82a in the form of a strip extending along one side edge of the joint plate 80 and having a width narrower than the joint portion 81, and a first portion 82a extending along one side edge of the joint plate 80. It has a rectangular second portion 82b projecting to the other side edge side. A rotation restriction portion is provided by bending this second portion 82b upward.

The second portion 82b (rotation regulating portion) is bent into an approximately L shape at approximately the middle position in the width direction of the joining plate 80, and as shown in FIG. 3B, the second portion 82b (rotation regulating portion) It is erected almost directly below 71a. The tip of the second portion 82b is located below the first bearing hole 71a. As a result, the second portion 82b is located below the base end portion 50, and as shown in FIG. 3A, when the operating member 40 is viewed from the outside, the second portion 82b is almost invisible. ing. Therefore, there is no risk that the appearance of the spring catch 20 will be impaired due to the presence of the second member.

Furthermore, since the lever 42 can be held at a predetermined angle, the lever 42 can be placed in a position where it does not interfere with work or walking. Therefore, workability can also be improved.

A surface substantially perpendicular to the joint portion 81 is formed in the second portion 82b. One surface constitutes an abutment surface 82c that receives the base end portion 50 thereon. That is, when the lever 42 is rotated by a predetermined angle in the opening direction, the end surface 90 of the sub wall 51c of the first metal fitting 51 is configured to abut against the contact surface 82c.

FIG. 5 schematically shows the operation of the spring catch 20 when opening the upper opening/closing cover 13a. FIG. 5(a) shows the spring catch 20 that holds the upper opening/closing cover 13a in a closed state.

At this time, the distal end portion 60 is rotated in the closing direction together with the base end portion 50, so that the hook 63 is latched onto the latching bar 33b with the engaging protrusion 62 inserted into the engaging hole 32a. There is. The base end portion 50 is in an extended state against the elastic force of the spring 54. As a result, a strong elastic force always acts on the hook 63 and the like, so that even if an external force acts on the upper opening/closing cover 13a, it can be stably held in the closed state.

When opening the upper opening/closing cover 13a, the grip 61 is lifted against the elastic force of the spring 54, as shown in FIG. 5(b). By doing so, the tip portion 60 rotates in the opening direction around the second support shaft 65 with the locking bar 33b serving as a fulcrum, and the engagement protrusion 62 comes out of the engagement hole 32a. The hook 63 comes to come off from the hanging rod 33b.

When the engagement protrusion 62 comes out of the engagement hole 32a and the hook 63 comes off the hook bar 33b, the lever 42 rotates in the opening direction, as shown in FIG. 5(c). At this time, the lever 42 tends to rotate vigorously in the opening direction due to the repulsion of the elastic force. Then, as shown in FIG. 5(d), when the lever 42 rotates by a predetermined angle, the end surface 90 of the sub-wall 51c abuts against the contact surface 82c of the second portion 82b. This restricts the lever 42 from rotating beyond that angle.

As a result, it is possible to prevent the lever 42 from colliding with the panel 11, etc., and the paint on the lever 42, the panel 11, etc. from peeling off. Since the second portion 82b is almost invisible from the outside, even if the paint on the second portion 82b is peeled off, there is almost no risk of spoiling the beauty of the spring catch 20. Since it is received by the surface, the paint is difficult to peel off and deformation can be suppressed. Therefore, it also has excellent durability.

<First modification example>
FIG. 6 shows a first modification of the spring catch 20.

In the embodiment described above, the spring catch 20 is exemplified in which the connecting plate portion integrated with each of the shaft supports 70 is composed of the connecting plate 80. On the other hand, in this modification, the connecting plate section is constituted by a construction board 100 that connects one side edge of the pair of support wall sections 71, 71. Note that the other configurations, such as the hanging member 30, are the same as in the embodiment. Therefore, the same reference numerals are used for the same members, and the description thereof will be omitted (the same applies to other modified examples).

The construction plate 100 of this modification includes a pair of inclined plate parts 101 that extend from the side edges of each support wall part 71 in the opening direction side toward the mounting wall part 72 in a state where they are opposed to each other, 101, and a regulating plate part 102 that is continuous with the tip ends of these inclined plate parts 101, 101, and is formed in an arch shape. In this modification, the pair of shaft supports 70, 70 and the construction plate 100 are constructed of one metal fitting by so-called can manufacturing sheet metal processing.

When the lever 42 rotates by a predetermined angle, the sub-wall 51c of the first metal fitting 51 abuts against the upper edge portion of the construction plate 100. This restricts the lever 42 from rotating beyond that angle. If it abuts against the upper edge of the construction board 100, the impact will be transmitted mainly in the width direction of the board, improving collision resistance and suppressing deformation of the construction board 100.

In this case, it is preferable to chamfer the upper edge of the regulating plate portion 102 to provide a contact surface 102a that receives the base end portion 50 thereon. When the sub-wall 51c of the first metal fitting 51 is received by the upper edge portion of the regulating plate portion 102, the sub-wall 51c is easily damaged. On the other hand, such scratches can be suppressed by providing a contact surface 102a so that the contact surface can be received.

<Second modification example>
FIG. 7 shows a second modification of the spring catch 20. In the first modification, a case is illustrated in which the pair of shaft supports 70, 70 and the construction plate 100 are configured with one metal fitting. In contrast, in this modification, the pair of shaft supports 70, 70 and the construction plate 100 are each made of separate members, and these are joined (welded) by so-called can manufacturing sheet metal processing. .

The construction plate 110 of this modification includes a pair of fixing parts 111, 111 facing each other, a spanning part 112 connected to one end of these fixing parts 111, 111, and a connecting part 111 connected to the fixing part 111 from the upper edge of the spanning part 112. has a backing plate 113 extending in the opposite direction. By joining each fixing portion 111 to each support wall portion 71, the construction plate 100 and the pair of shaft supports 70, 70 are integrated.

When the lever 42 rotates by a predetermined angle, the sub-wall 51c of the first metal fitting 51 abuts against the backing plate 113 and is configured to be received by the surface. This restricts the lever 42 from rotating beyond that angle.

In this case, an existing bracket, that is, a bracket in which the pair of shaft supports 70, 70 are individually provided, can be used, so it is highly versatile. Since it is only necessary to join the construction plates 110, it can be realized easily and inexpensively.

<Third modification example>
FIG. 8 shows a third modification of the spring catch 20. This modification example exemplifies the case where the spring catch 20 having the backing plate 113 as in the second modification example is constructed with one metal fitting by so-called can manufacturing sheet metal processing as in the first modification example. There is.

That is, a metal plate 120 punched into the shape shown in FIG. 8A is bent and processed as shown in FIG. 8B. By doing so, the bracket 41 like the first modified example having the backing plate 113 like the second modified example can be formed with one metal fitting.

Note that the work machine catch according to the disclosed technology is not limited to the above-described embodiments, and includes various other configurations. The working machine is not limited to a hydraulic excavator. For example, it may be a crane or the like. The undercarriage may be of a wheel type that runs on wheels. The machine body does not have to pivot relative to the undercarriage. The catch does not necessarily have to be a spring catch.

The specific structure of the catch can be changed as appropriate depending on the specifications. For example, the angle of the lever when received by the rotation regulating section can be arbitrarily set by adjusting the angle of the backing plate. The structures of the hanging member and the lever are also examples, and can be changed according to specifications.

1 Hydraulic excavator (work machine)
2 Lower traveling body 3 Machine body 4 Cab 5 Attachment 6 Counterweight 10 Machine room 11 Panel 12 Opening 13 Cover member 13a Top opening/closing cover 13b Side opening/closing cover 14 Step plate 15 Auxiliary step 20 Spring catch (catch)
30 Latching member 40 Operating member 41 Bracket 42 Lever 50 Base end portion 51 First metal fitting 52 Connecting rod 53 Second metal fitting 54 Spring 60 Tip portion 61 Grip 62 Engagement protrusion 63 Hook 70 Axial support 71 Support wall portion 72 Mounting wall portion 80 Joint plate (connecting plate part)
81 Joint part 82 Connecting part 82a First part 82b Second part (rotation regulating part)
82c Abutting surface 90 End surface 100 Construction plate (connecting plate part)
110 Erection plate (connection plate part)

Claims (3)

In a working machine in which a machine room whose periphery is covered with a panel is installed, a catch for holding in a closed state a cover member that opens and closes an opening formed in the panel,
a hanging member disposed at a first attachment site of either the cover member or the panel;
an operating member disposed at the other second attachment site of the cover member and the panel so as to be latched to the latching member;
Equipped with
The operating member is
a bracket fixed to the second attachment site;
a lever pivotally supported by the bracket;
has
The lever is
a proximal end portion whose one end is pivotally supported by the bracket and which rotates in both a closing direction to be latched to the latching member and an opening direction opposite to the closing direction;
a distal end portion rotatably connected to the other end of the proximal end portion and latched to the latching member;
has
The bracket has a pair of pivot supports that pivot the base end portion from both sides via a support shaft,
Each of the pivot supports is
a support wall portion that supports an end portion of the support shaft;
a mounting wall portion bent from a base end of the support wall portion and fastened to the second mounting portion;
has
The bracket further includes a connecting plate portion that is integrated with each of the pivot supports, and the connecting plate portion is provided with a rotation regulating portion that abuts when the base end portion rotates by a predetermined angle in the opening direction. being caught. In the catch according to claim 1,
The connecting plate portion is composed of a joining plate whose upper surface is joined to the lower surface of each of the mounting wall portions,
A catch in which the rotation regulating portion is provided in an intermediate portion of the joint plate. In the catch according to claim 1,
The catch in which the connecting plate portion is made of a construction plate that connects one side edge of the pair of support wall portions, and the rotation restriction portion is configured by the construction plate.

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