JPH0728037Y2 - Rear mirror equipment for construction machinery - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rear mirror device for a construction machine.

2. Description of the Related Art FIG. 8 is a partially cutaway side view of a hydraulic excavator. In the figure, 1 is a lower traveling structure, 2 is an upper revolving structure, 3 is a counterweight mounted at the rear end of the upper revolving structure 2,
Reference numeral 4 is an engine room, 5 is an engine arranged in the engine room 4, 6 is a muffler of the engine 5, 7 is a driver's cab, 8 is a lifting handrail, and 9 is a rear mirror.

When the hydraulic excavator works, the upper swing body 2 is swung and the lower traveling body 1 is moved backward. Therefore, a rear mirror 9 is attached to the handrail 8 on the side of the upper swing body 2 so that the lower rear side of the upper swing body 2 is located in the cab 7
Therefore, it is designed to be viewed through the rear mirror 9.

Problems to be Solved by the Invention Since the rear mirror of the prior art is mounted at a side position on the front side of the upper swing body, the rear side of the counterweight is hard to see from the operator's cab of the hydraulic excavator. An object of the present invention is to provide a rear mirror device that can solve the above problems.

Means for solving the problems a. A rear mirror is attached to the upper revolving structure of the construction machine, an operating rod is provided near the driver's seat, the operating rod and the rear mirror are connected via a push-pull cable, and the rear mirror is used by operating the operating rod. In the rear mirror device that can be held in the storage position and the storage position, A fulcrum is provided on the lower side of the front surface of the counterweight equipped at the rear end of the upper swing body, a link lever is attached to the fulcrum, one end of the link lever is connected to the push-pull cable, and the other end is attached to the rear mirror. The stay is connected to the stay, and the stay is slidably attached to a guide metal member rotatably provided by a boss attached to the front surface of the counterweight. Also, a passage hole through which the rear mirror can pass is opened in the bonnet in the upper part of the engine room, and the stay moves up and down while being supported by a guide bracket provided in the vicinity of the passage hole at the use protruding position and its vicinity. I made it possible.

Action a. When the operating rod inside the driver's cab is operated to rotate the other end of the link lever upward, the stay of the rear mirror slides in the guide fitting and is pushed upward, which causes the guide fitting to rotate further. Along with this, it pivots rearward and comes into contact with the stay support pin of the guide bracket in the vicinity of the use protruding position, so that it moves while being supported so that it can be fixed at any use protruding position. Since the rear mirror is projected and fixed to the upper side of the bonnet, the driver can view the lower rear side of the construction machine from the cab through the rear mirror.

B. When the operating rod in the driver's cab is operated to rotate the other end of the link lever downward, the stay of the rear mirror slides in the guide fitting and descends. Therefore, when the rear mirror is not used, for example, when the construction machine is transported by a trailer or the like, the rear mirror can be stored in the engine room of the construction machine.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a rear view of a hydraulic excavator having a rear mirror device 10 of the present invention. In the figure, the same reference numerals are given to those using the same constituent elements as those in the prior art. Reference numeral 11 is an upper swing body, 12 is a driver's cab, 13 is a rear mirror of the rear mirror device 10, and 14 is a stay. FIG. 2 is a plan view of the rear portion of the hydraulic excavator seen from A in FIG. In the figure, reference numeral 15 is a hood, and 16 is a rear mirror 13 pierced into the hood 15.
A through hole, a guide metal fitting 17 for the rear mirror device 10, a link lever 18, and an engine room at the rear of the hydraulic excavator. FIG. 3 is a cross-sectional view of the main part seen from BB of FIG. In the figure, 20 is a fulcrum of the link lever 18, 22 is one end of the link lever 18, 21 is the other end of the link lever 18, 23
Is a lower end portion of the stay 14, 24 is a guide bracket for the stay 14, and 25 is a push-pull cable. Figure 4 shows the second
It is a principal part sectional view seen from CC of a figure. In the figure, 26
Is a front plate of the counterweight 3, 27 is a support pin for the stay 14 attached to the guide bracket 24, 28 is a guide fitting 17
The boss member for use with 29 is a pivot pin. FIG. 5 is a side view showing the guide fitting 17. In the figure, 30 is a guide fitting 17
Reference numeral 31 denotes a metal fitting body, and reference numeral 31 denotes an elongated hole portion which is bored in the metal fitting body 30 in the longitudinal direction. FIG. 6 is a sectional view taken along the line DD of FIG. In the figure, 32 is a spring member, 33 is a spring seat portion of the metal fitting body 30, 34 is a sliding pin movable along the elongated hole portion 31, 35 is a fixing pin, and 36 is a bracket portion of the metal fitting body 30. Then, since the spring member 32 biases the sliding pin 34 toward the stay 14 side, the stay 14 can be guided in the guide fitting 17 so as not to greatly swing. FIG. 7 is a side view showing a state in which the rear mirror 13 is stored in the engine room 19.

Next, the structure of the rear mirror device 10 of the present invention is shown in FIGS.
The figure will be described. In the present invention, a fulcrum 20 is provided on the lower side of the front surface of the counterweight 3 mounted on the rear end of the upper swing body 11.
The link lever 18 is attached to the fulcrum 20, one end of the link lever 18 is connected to the bush pull cable 25, and the other end is connected to the stay 14 attached to the rear mirror 13.
A boss 28 mounted on the front surface of the counterweight 3 slidably mounts a guide fitting 17 provided on the counterweight 3, and a passage hole through which a rear mirror 13 can pass through a bonnet 15 above the engine room 19. 16 is opened to allow the stay 14 to move up and down while being supported by a guide bracket 24 provided at a position near the passage hole 16 at and near the use protruding position. In addition, the lower end portion 23 of the stay 14 is formed in a ring shape, and with respect to the ring-shaped lower end portion 23,
The other end 21 of the link lever 18 is rotatably inserted.
Then, when the push-pull cable 25 is pushed and pulled by the size S, the link lever 18 rotates by the angle θ as shown in FIG. 3, and the stay 14 moves up and down by the stroke S.

Next, the operation of the rear mirror device 10 of the present invention will be described. When the operating rod in the cab 12 is operated to rotate the other end 21 of the link lever 18 upward, the stay 14 of the rear mirror 13 slides in the guide fitting 17 and is pushed upward. Further, as the guide fitting 17 rotates, it rotates rearward, and the stay 14 support pin of the guide bracket 24 near the use protruding position.
By abutting against 27, it moves while being supported so that it can be fixed at any projecting position for use. And rear mirror
Since 13 is projected and fixed to the upper side of the bonnet 15,
The driver can view the lower rear side of the hydraulic excavator from inside the cab 12 through the rear mirror 13. Further, when the other end 21 of the link lever 18 is rotated downward by the operation of the operation rod, the stay 14 of the rear mirror 13 is guided by the guide fitting 17
It slides inside and descends. Accordingly, when the rear mirror 13 is not used, for example, when the hydraulic excavator is transported by a trailer or the like, the rear mirror 13 can be stored in the engine room 19. Therefore, by operating the operating rod in the cab 12 according to the driver's desire, the rear mirror
It is possible to project 13 to the upper side of the hood 15 or to store it in the engine room 19.

Effect of the Invention In the construction machine equipped with the rear mirror device of the present invention, when the driver operates the operation rod in the cab when he / she wants to visually check the rear side of the construction machine, the rear mirror is projected and fixed to the upper side of the hood. To be done. Thereby, the driver can view the lower rear side of the construction machine from the cab through the rear mirror. Further, when visual confirmation by the rear mirror is not necessary, the rear mirror can be stored in the engine room on the front side of the counterweight by operating the operating rod. Therefore, when the rear mirror is stored, the rear mirror does not obstruct the rear view from the driver's cab, and it is possible to prevent the rear mirror from colliding with or hit by an external obstacle. Moreover, since the rear mirror is completely invisible from the outside during storage, the appearance of the construction machine can be maintained.

[Brief description of drawings]

1 is a rear view of a hydraulic excavator equipped with a rear mirror device of the present invention, FIG. 2 is a plan view of the rear portion of the hydraulic excavator as seen from A of FIG. 1, and FIG. 3 is a B-B of FIG. 4 is a side view showing the guide fitting, and FIG. 6 is a DD view of FIG. 5.
FIG. 7 is a side view showing a state in which the rear mirror is stored in the room, and FIG. 8 is a partially cutaway side view of the hydraulic excavator according to the related art. 4,9 …… Engine room 7,12 …… Operating room 9,13 …… Rear mirror 10 …… Rear mirror device 14 …… Stay 15 …… Bonnet 17 …… Guide fitting 18 …… Link lever 25 …… Push-pull Cable 26 …… Front plate 27 …… Support pin

Claims (1)

[Scope of utility model registration request] 1. A rear mirror 13 is attached to an upper revolving structure 11 of a construction machine, an operating rod is provided near a driver's seat, and the operating rod and the rear mirror 13 are connected via a push-pull cable 25 to perform the above operation. In the rear mirror device capable of holding the rear mirror 13 in the use projecting position and the retracted position by operating the rod, a fulcrum 20 is provided on the lower side of the front face of the counterweight 3 equipped at the rear end of the upper swing body 11, The link lever 18 is attached to the fulcrum 20, one end of the link lever 18 is connected to the push-pull cable 25, and the other end is connected to the stay 14 attached to the rear mirror 13, and the stay 14 is connected to the counterweight 3
A boss 28 attached to the front of the engine allows it to be slidably attached to a guide metal fitting 17 that is rotatably mounted.
The upper hood 15 has a through hole 16 through which the rear mirror 13 can pass, and the stay 14 is supported by a guide bracket 24 provided at a position close to the through hole 16 at and near the use protruding position. The rear mirror device for construction machinery is characterized by being vertically movable.