KR101060836B1 - Rear monitoring device of construction machinery - Google Patents

Abstract

The present invention protects the camera used for rear surveillance from being stolen without performing special processing on the casing of the machine room building or the counterweight.

The base member main body 35 which mounts the camera 31 to the holder 32 is connected to the mounting plate 36 by the nut 44, and makes the cover member 33 fit the base member main body 35, The bolt 42 is screwed into the nut 41 from the lower surface side of the base member main body 35 to connect the cover member 33 so that the camera 31 cannot be taken out from the camera housing 30, The mounting plate 36 is fixed to the casing upper surface portion 20 by bolts 46A and 46B, and the bolt 46B is positioned inside the engine cover 22. When the lock 23 is locked to the engine cover 22, the camera unit 10 can not be separated from the casing upper surface 20 of the counterweight 7.

Camera, Holder, Bolt, Nut, Lock, Counterweight, Engine Cover

Description

REAR VIEW SYSTEM OF CONSTRUCTION MACHINE}

1 is an overall configuration diagram of a hydraulic shovel as an example of a construction machine equipped with a rear monitoring device according to the present invention;

Figure 2 is a plan view of the main part of Figure 1;

3 is a cross-sectional view of the camera unit.

4 is a cross-sectional view showing a configuration of a camera mounting portion in the camera unit.

5 is an explanatory diagram showing respective regions in the plane of the mounting plate;

Fig. 6 is a sectional view showing the assembling process of the base member.

Fig. 7 is a sectional view showing a step of connecting the cover member to the base member.

Fig. 8 is a sectional view showing a step of attaching the camera unit 10 to the casing upper surface portion of the counterweight.

<Explanation of symbols for the main parts of the drawings>

1: lower traveling body

2: upper pivot

4: Cab

5: machine room building

6: counterweight

10: camera unit

11: monitor

20: casing upper surface

21: top cover

22: engine cover

23: lock

30: camera housing

30a: receptacle

31: camera

31a: objective lens unit

32: camera holder

33: cover member

34: base member

35: base member body

36: mounting plate

39: transparent plate

40: connecting plate

41, 43, 45: nuts

42, 44, 46A, 46B: Bolt

50: wiring

51: concave groove

52, 53: insertion through hole

[Document 1] Japanese Unexamined Patent Application Publication No. 10-140619

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear monitoring device for a construction machine, mounted on an upper swing structure of a construction machine such as a hydraulic shovel, to secure a rear view that cannot be obtained from a cab.

As a construction machine, for example, a hydraulic shovel is a work means mounted on an upper swing body which is frequently mounted via a turning device on a lower traveling body provided with a means, and the work such as excavation of earth and sand is executed by operating the work means. do. The cab is provided in the upper swing structure for the operation of the machine such as driving the vehicle by the lower traveling body, turning the upper swing body and operating the work means. In this cab, a driver's seat on which an operator sits is provided, and operation means, such as an operation lever and a pedal, are provided in the left and right sides and the front of this driver's seat. The cab is installed in parallel with the working means in the front position of the upper swing structure, and the rear part of the cab is arranged with a machine room in which an engine and other equipment are installed, and is located rearward from the machine room building. Counterweight is installed in the

During operation of the hydraulic shovel, the operator needs to monitor its surroundings for safety confirmation and to ensure smooth operation. For this reason, the cab is provided around the whole circumference, and an operator can visually confirm the area | region where a hydraulic shovel operates. In addition, the rearview mirror is mounted at an appropriate position in order to obtain a rearward view that is difficult to see from the cab, whereby the operator can secure the rearward view to some extent in the state of facing forward. However, the machine room located at the rear of the cab has a predetermined height in order to secure a wide space in the interior of the cab, and also has a large blind spot at the rear of the vehicle because there is also a distance to the counterweight placed at the rear. (Iii) An area exists. For this reason, an operator may not be able to recognize them especially when protrusions, such as a structure, exist on the ground, or when a person or an animal enters, especially when backing a vehicle.

As described above, in order to secure the rear view, the camera is mounted on the counterweight and the monitor is mounted in the cab, and the rear side is monitored by acquiring the image of the area including the rear side by the camera and displaying the image on the monitor. What was comprised so that it may describe is described in patent document 1, for example. In Patent Document 1, the camera provided on the counterweight is exposed to the outside, so that the camera is protected from theft. As a specific structure, a camera is attached to a bracket and this bracket is attached so that reversibility is possible in the vicinity of the engine cover in the upper swing body. Therefore, when the camera is used, the bracket is placed in an operating state arranged on the building cover, and when the camera is not in use, the bracket can be rotated by 180 ° and stored inside the engine cover.

[Patent Document 1] Japanese Patent Application Laid-Open No. 10-140619

The engine cover can be kept closed by a lock. Therefore, it is advantageous to prevent theft by locking the engine cover while the camera is stored inside the engine cover. However, this operation is remarkably cumbersome for storing and withdrawing the camera in the engine cover, since the lock must be opened to open the engine cover, and then the bracket must be inverted to close the engine cover to lock the lock. In essence, the engine cover is a heavy load, not frequently opened and closed, and the camera is stored in the engine cover at the end of each day's work such as opening and closing on the machine room building, and the camera is operated at the start of work. It is not possible to perform such operations, and the like, and this operation is very difficult and has a problem that it is not practical.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and its object is to provide a countermeasure for preventing theft of a camera used for rear monitoring without performing special processing on a casing of a machine room building or counterweight. There is.

In order to achieve the above object, the present invention provides a construction in which a camera is provided on the casing upper surface of the counterweight to obtain a view behind the construction machine, and a monitor is installed in the cab that displays an image acquired by the camera. A rear monitoring device of the machine, comprising a cover member and a base member detachably connected to each other on the upper surface of the casing, and a camera housing in which an accommodating space is formed therein is detachably mounted. The base member is mounted to contact the casing upper surface portion, and the cover member and the base member are connected by screwing a screw from the contact surface side of the base member to the casing upper surface portion, and the base member is connected to the engine cover. Extends to the covered position, covered by this engine cover It is characterized in that it is configured to be connected to the upper surface of the casing by a screw of at least one portion in the open portion.

The camera housing is intended to protect the camera stored therein from being stolen, and to prevent damage caused by flying such as rocks, and therefore must have high strength. For this reason, a camera housing is preferably comprised from metal materials, such as a steel plate. However, in order to secure the external view required for the camera housed inside the camera housing, it is necessary to form an opening in this camera housing. This opening part is for ensuring the field of view of the camera provided in the camera housing, and makes it the magnitude | size of a minimum required for the purpose. And transparent plates, such as transparent resin and glass, are attached to an opening part as needed. In addition, a transparent plate can also be comprised so that it may be installed in the camera side. In addition, the opening is formed in a portion of the cover member from either the base member or the cover member or from the base member. In the case where the camera is supported by the base member, it is reasonable to provide the opening also in the base member. The objective lens of the camera is disposed so as to face the opening, but when placed close to the opening, a wider field of view is secured.

In order to attach and detach the camera stored in the camera housing, this camera housing has a structure which can be disassembled. This is why the camera housing including the base member and the cover member is used. The base member extends to a position covered by the engine cover, and a screw is inserted and connected to the casing upper surface at least in one portion of the portion covered by the engine cover. In order to stabilize the camera housing so that it does not fluctuate, a screw of one part or a plurality of parts is inserted into the upper part of the casing by inserting a screw in one part or a plurality of parts in other parts, i.e., a part not covered with the cover member or a position above the cover member. It is possible to fix it, whereby the camera housing can be stably maintained. Therefore, the base member needs to have the dimension from the position where a camera is mounted to the inside of an engine cover, and it is set as the shell structure which has the accommodation space of a camera inside by a cover member. Thus, the base member is formed of two members, the base member main body forming the shell structure together with the cover member, and the mounting plate detachably fixed to the base member main body, so that the mounting plate is in contact with the upper surface of the casing. It is preferable to set it as the structure attached. In the casing of the counterweight, a recessed groove reaching the portion covered by the engine cover is formed in a portion covered by the mounting plate, and the recessed groove can be a passage for arranging the wiring from the camera. have. In addition, a wiring extraction hole is formed in the base member of the camera housing, and the wiring is inserted into the recessed groove from the transmission hole.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on drawing. First, FIG. 1 shows the overall configuration of a hydraulic shovel as an example of a construction machine. In the figure, reference numeral 1 denotes a lower traveling body, and 2 denotes an upper swinging body that is pivotably provided on the lower traveling body 1. The upper revolving structure 2 is equipped with work means 3 for carrying out work such as excavation, and a cab 4 is provided in parallel with the work means 3. The machine room building 5 is arrange | positioned at the rear part position of the cab 4, and the counterweight 6 is provided in the rear part position of this machine room building 5. As shown in FIG.

As is apparent from Fig. 1, in this hydraulic shovel, the rear view cannot be obtained from the cab 4. So, for example, in order to ensure safety at the time of backing of the vehicle, the operator has a rear monitoring device which assists to acquire the rear view. This rear monitoring device is composed of a camera unit 10 and a monitor 11 displaying a rear view image obtained by the camera unit 10. The camera unit 10 is arrange | positioned above the counterweight 6 in the upper revolving structure 2, and is attached so that the camera unit 10 may face rearward. On the other hand, the monitor 11 is mounted in the cab 4.

Next, in FIG. 2, the plane of the site | part from the machine room building 5 to the counterweight 6 in the upper swinging structure 2 is shown. In this figure, reference numeral 20 denotes a casing upper surface portion of the counterweight 6, 21 an upper cover of the machine room building 5, and 22 an engine cover. In the machine room building 5, apparatuses, such as an engine, are installed, and heat exchangers, such as a radiator, are connected and installed in the engine. The engine cover 22 covers the upper part of the installation part of this engine, and in order to perform maintenance of this engine etc., it comprises the opening-and-closing cover which was made to be opened and closed in the up-down direction centering on the one side part 22a. . Therefore, the part covered with the engine cover 22 in the upper cover 21 of the machine room building 5 becomes the opening part 21a. In addition, the engine cover 22 extends from the machine room building 5 to the position of the casing upper surface portion 20 of the counterweight 6 and is in contact with the casing upper surface portion 20.

3 shows an example of the configuration of the camera unit 10. As is apparent from the figure, the camera unit 10 is configured by storing a camera holder 32 in which a camera 31 is mounted in a camera housing 30. The camera housing 30 is comprised from the cover member 33 and the base member 34 joined to this cover member 33. Moreover, the base member 34 is comprised from the base member main body 35 and the installation plate 36. The camera 31 attached to the camera holder 32 is fixed to a cavity formed by the base member main body 35 in the cover member 33 and the base member 34. Therefore, it has a shell structure which accommodates the camera 31 in the space formed by the cover member 33 and the base member main body 35, and the camera housing (with the cover member 33 and the base member main body 35). The camera accommodating part 30a is formed in 30.

As apparent from Fig. 4, the camera holder 32 is fixedly attached to the left and right pair of brackets 37 and 37 fixedly attached to the base member main body 35 by bolts 38. An opening 35a is formed in the end face portion of the base member main body 35, and the opening 35a constitutes a light transmitting portion for acquiring the field of view of the camera 31. The tip end surface of the camera holder 32 is attached to contact the periphery of the opening 35a, and the transparent plate 39 formed of glass, plastic, or the like is attached to the portion facing the opening 35a. The objective lens portion 31a of the camera 31 is maintained at a predetermined interval with respect to the transparent plate 39.

The camera housing 30 accommodates the camera 31 therein. The camera housing 30 is protected so that the camera 31 is not damaged even if it collides with a fixed object such as a rock, a tree, or a structure such as a rock. The entire camera housing 30, that is, the cover member 33 and the base member 34, is made of a high rigid metal material. And the cover member 33 which comprises the camera housing 30 is detachably connected to the base member main body 35 which comprises the base member 34, and the base member main body 35 is the installation plate 36 It is connected detachably to. In addition, the mounting plate 36 is detachably fixed to the casing upper surface portion 20 (part of which may be caught by the upper cover 21) of the counterweight 6.

In order to attach | attach the cover member 33 to the base member main body 35 detachably, the connecting plate 40 which consists of a metal plate bent to the inner surface of the cover member 33 is fixedly attached by welding means. Here, in the structure shown, the connecting plate 40 is formed in two parts, but in other words, the cover member 33 and the base member main body 35 are formed by the bolts 42 at least two parts, preferably at least three parts. If connected, the number and shape of the connecting plates is arbitrary. When the cover member 33 is fitted to the base member main body 35, the connecting plate 40 is provided with a contact surface portion 40a in contact with the inner surface of the base member main body 35, and the contact surface portion 40a. ), A hole through which the bolt is inserted is formed, and a nut 41 is fixedly attached by welding so as to surround the hole.

On the other hand, the cover member 33 is detachably connected to the base member main body 35 by inserting the bolt 42 through the nut 42 from the lower surface side of the base member main body 35. For this reason, the bottom surface part of the base member main body 35 becomes the protruding part 35b formed convexly over the predetermined range, and the bolt 42 is attached to the position in this protruding part 35b. Therefore, the step of this raised part 35b is substantially equivalent to the thickness of the head part of the bolt 42 and the nut 45 mentioned later, or has a step size which falls more than those.

The base member main body 35 constituting the base member 34 is detachably connected to the mounting plate 36. Although the base member main body 35 and the installation plate 36 are connected using the bolt 44, the base member main body 35 is perforated with a through hole for penetrating the bolt, and the back side thereof. The nut 43 is fixedly attached by welding means. Therefore, the base member main body 35 and the mounting plate 36 are fixed in the connected state by screwing the bolt 44 into the nut 43 from above.

The mounting plate 36 is detachably fixed to the casing upper surface portion 20 of the counterweight 6 in a plurality of portions, for example, four portions. Here, although the inside of the casing of the counterweight 6 is filled with cement etc. as a heavy thing, at least several to tens of percent of the upper side becomes a space. Thus, the nut 45 is welded to the inner side of the packing body of the casing upper surface part 20, and the bolts 46A and 46B are screwed into the nut 45 from the upper surface side of the mounting plate 36. The mounting plate 36 is detachably fixed to the casing upper surface portion 20. Here, the attaching part of the two bolt 46A is attached to the cover member 33, and is located in the side which comprises the accommodating part of the camera 31 with the base member main body 35. As shown in FIG. The end of the mounting plate 36 is led into the inside of the engine cover 22, and the other two bolts 46B are located at the portion covered by the engine cover 22.

Thus, as shown in Fig. 5, the mounting plate 36 is provided with a receiving portion 30a of the camera housing 30 whose one end side is formed by the cover member 33 and the base member main body 35. It is the area | region F, and the site | part of this area | region F is becoming wider. And two bolts 46A are attached to the bolt insertion through-hole 47 provided in the wide part and avoiding the area | region F. As shown in FIG. The other end side of this wide part is a narrow part. The other end side of this mounting plate 36 is an area B covered by the engine cover 22. And the bolt insertion hole 47 in which the bolt 46B is mounted is located in this area | region B. As shown in FIG. By these four bolts 46A and 46B, the camera unit 10 is stably held.

As is apparent from Fig. 5, the mounting plate 36 is larger than the shaft portions of the bolt insertion through-hole 47 and the bolt 44 having dimensions larger than those of the bolts 46A and 46B and smaller than those bolt heads. A bolt insertion through hole having a size smaller than that of the bolt head is drilled, and a nut 43 is fixedly attached. In addition, since the bolt 42 for connecting the cover member 33 and the base member main body 35 is disposed in the region F, the through hole 48 having a larger hole diameter than the head of the bolt 42 is provided. It is perforated.

Moreover, although the wiring 50 is connected to the camera 31, since the processing circuit of the video signal from the camera 31 and the monitor 11 are provided in the cab 4, the wiring 50 is a cab ( 4) Must be arranged up to. The wiring 50 extends from the cab 4 through the interior of the machine room building 5 to the position of the counterweight 6. Since the camera housing 30 is attached to the casing upper surface portion 20 of the counterweight 6, the wiring 50 is drawn out of the machine room building 5 and connected to the camera housing 30. The camera housing 30 has a mounting plate 36, one end of the mounting plate 36 is led into the engine cover 22, and the base member main body 35 is in contact with the upper end of the other end. . Therefore, in the casing upper surface part 20, the recessed groove 51 is formed in the site which the installation plate 36 contacts, and the wiring 50 extended to the edge part of the machine room building 5 is carried out by this recessed groove ( 51). Then, the insertion plate holes 52 and 53 are drilled in the mounting plate 36 and the base member main body 35, respectively, and the camera housing space 30a of the camera housing 30 is passed through the insertion hole 52 and 53. ), The wiring 50 is drawn out. As a result, the wiring 50 from the camera 31 is not exposed to the outside, so that damage due to the collision is not caused, and the appearance is also good in appearance.

Although the camera unit 10 is comprised as mentioned above, the method of mounting this camera unit 10 is demonstrated based on FIG. 6 thru | or FIG. First, the camera holder 32 is attached to the bracket 37 attached to the base member main body 35, and the camera 31 is assembled to this camera holder 32. As shown in FIG. Then, the wiring 50 from the camera 31 is inserted through the insertion hole 53 drilled into the base member main body 35.

In the above state, the base member 34 is assembled by first connecting the base member main body 35 to the mounting plate 36 as shown in FIG. This assembly is performed by screwing the bolt 44 into the nut 45, but the bolt 44 is screwed from the upper side in the drawing, that is, from the inner surface side of the base member main body 35. In this connection, the wiring 50 is inserted through the insertion through hole 52. The nut 45 may be provided on the base member main body 35 side, and in this case, the bolt 44 is screwed in from the lower side in the drawing. In addition, the base member main body 35 and the installation plate 36 are not necessarily detachably connected, but can also be comprised as an integral body.

Next, as shown in FIG. 7, the cover member 33 is fitted to the base member main body 35 to form the accommodating portion 30a in which the camera 31 is accommodated in the camera housing 30. Then, the connecting plate 40 of the cover member 33 is brought into contact with the inner surface of the base member main body 35, and the cover is screwed into the nut 41 from the lower surface side of the base member main body 35. The member 33 is connected to the base member main body 35. Thereby, the camera unit 10 which accommodated the camera 31 inside the camera housing 30 can be assembled. Here, since the base member main body 35 is already connected to the mounting plate 36 in the step before connecting with the cover member 33, the head part of the bolt 42 can also be inserted through the mounting plate 36. When the penetration hole having a hole diameter is drilled and the bolt 42 is actually fixed and attached, the bolt 42 is inserted from the rear side of the mounting plate 36 and screwed to the nut 41.

In addition, as shown in FIG. 8, the wiring 50 extending to the lower side of the mounting plate 36 is inserted into the recessed groove 51 formed in the upper surface portion 20 of the casing, and at the same time, the mounting plate 36 is provided. To the casing upper surface portion 20. A part of the mounting plate 36, that is, the portion of the region B is located in the engine cover 22, so that the engine cover 22 is opened in advance.

When the mounting plate 36 is disposed at a predetermined position, it is fixed to the casing upper surface portion 20 by bolts 46A and 46B. After that, the engine cover 22 is to be closed. Here, since the lock 23 is provided in the engine cover 22, the lock 23 is to be locked. Thereby, the camera unit 10 is provided on the counterweight 6, as shown in FIG. In the assembled state of the camera unit 10, the wiring 50 is not exposed to the outside.

By assembling and attaching as described above, theft prevention of the camera 31 can be aimed at. Since the camera 31 is located in the accommodating part 30a of the camera housing 30 and is covered by the cover member 33 and the base member 34 which are all formed with the metal material, the cover member 33 or The camera 31 cannot be taken out by damaging the base member 34.

The camera unit 10 can be disassembled from the viewpoint of the necessity of maintenance. Therefore, when the cover member 33 and the base member main body 35 are separated, the camera 31 can be taken out. However, the bolt 42 connecting the cover member 33 and the base member main body 35 is not shown on the surface side of the camera unit 10, and the bolt 42 faces the contact surface side to the casing upper surface portion 20. Therefore, the camera 31 cannot be taken out unless the whole of the camera unit 10 is removed from the casing upper surface part 20.

Since the mounting plate 36 is fixedly attached to the casing upper surface portion 20 with bolts 46A and 46B, the entire camera unit 10 is casing upper surface portion 20 unless these bolts 46A and 46B are attached or detached. It cannot be separated from. Since the bolt 46A is exposed to the outside, the bolt 46A can be easily attached and detached. However, the bolt 46B is located inside the engine cover 22, and the lock 23 is locked to the engine cover 22. For this reason, the bolt 46B cannot be attached or detached unless the lock 23 is opened. That is, unless the lock 23 is opened and the engine cover 22 is opened, the camera unit 10 cannot be separated from the upper swing body 2. That is, the theft of the camera 31 can be prevented.

Here, as shown in Fig. 5, the engine cover 22 overlaps the casing upper surface portion 20 of the counterweight 6 over a large width, and the bolt 46B is fixedly attached using this overlapped portion. I'm rich. Here, the width | variety which the engine cover 22 protruded to the casing upper surface part 20 is the protrusion amount from the upper cover 21 of the protrusion part upwards in the inside of the engine cover 22, and the casing upper surface part 20 Depends on the distance to the end face. In Fig. 5, the heat exchanger H is higher than the top cover 21 and is in a position close to the counterweight 6. Thus, by using a large heat exchanger H, heat exchange efficiency can be improved. And it is necessary to suppress the upright angle from the viewpoint of maintaining the strength of the engine cover 22. Therefore, in the engine cover 22, when it is inclined by the predetermined inclination angle from the height position of the heat exchanger H, it will protrude largely with respect to the casing upper surface part 20. As shown in FIG. The bolt 46B is disposed inside the engine cover 22 which protrudes in this way.

This configuration can provide measures to prevent theft of the camera used for rear monitoring without applying a slight processing such as a bolt insertion through portion to the machine room building or the counterweight casing. do.

Claims (4)

In the rear monitoring device of a construction machine, a camera is installed on the upper surface of the casing of the counterweight so as to obtain a view behind the construction machine, and a monitor is installed in the cab that displays an image acquired by the camera. A cover member and a base member detachably connected to each other on the upper surface of the casing, and a camera housing in which an accommodation space of the camera is formed is detachably mounted therein, The camera housing is mounted so that the base member contacts the casing upper surface portion, and the cover member and the base member are connected by screwing a screw from the contact surface side of the base member to the casing upper surface portion. The base member extends to the position covered by the engine cover, and is connected to the upper surface of the casing by a screw of at least one portion to the portion covered by the engine cover, wherein the rear monitoring device of the construction machine . The said base member is a structure which screws one part or several site | part screws with respect to the said casing upper surface part in the part which is not covered by the said cover member or the position of the upper side of the said cover member. Rear monitoring device of construction machinery characterized by the above. The said base member consists of a base member main body and the installation plate detachably fixed to this base member main body, Comprising: The said casing upper surface part is comprised so that the said installation plate may contact and mount. Rear monitoring device for a construction machine, characterized in that. The recessed part is formed in the site | part of the said casing upper surface part covered by the said installation plate to the position which the said engine cover is covered, The permeable hole is formed in the said base member, and it connected to the said camera. The wiring is a structure for allowing the penetration hole to penetrate into the concave groove. The rear monitoring device for a construction machine.

Images