JP2736836B2 - Track work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track working machine used, for example, for repairing railway tracks and their surroundings.

[0002]

2. Description of the Related Art Conventionally, as this type of track working machine, there is known a track machine in which a shovel excavating mechanism is provided in a working machine body, and the working machine body is provided with a crawler belt for ground running and wheels for detachable rail running. ing.

For example, during excavator excavation or sleeper replacement work, the crawler belt is placed on the ground beside two rails on both sides, and in this state, for example, excavation work or track bed replacement work of a railway track is performed, and location movement or the like is performed. Therefore, when traveling on the rails, put the wheels on the rails and lift the track off the ground and separate it,
In this state, the vehicle is configured to drive the wheels and travel by rail.

[0004]

However, in the case of the above-mentioned conventional structure, since electric poles are erected around the track, an operator is required to avoid a contact accident between the boom and the electric wire.
The boom is raised and retracted while confirming the safety visually, which reduces the work efficiency and also requires the reliance on visual inspection, resulting in lower safety. doing.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve such inconvenience, and the gist of the present invention is to provide a work body composed of an upper turning body and a lower traveling body with a crawler belt for ground running and It is equipped with wheels for rail running, erects a support on the upper turning body, arranges a main boom capable of elevating operation on the upper part of the support, and includes a telescopic boom capable of telescopic operation on the main boom, A photoelectric sensor for detecting a limit height of the boom is provided, and the photoelectric sensor includes a light emitting unit and a light receiving unit that emit red light, and a red light emitted from the light emitting unit near the light emitting unit emits a red signal. The track working machine is characterized by arranging and configuring a light source body for preventing misunderstanding.

[0006]

The red light emitted from the light emitting part of the photoelectric sensor is emitted from the light emitting part of the photoelectric sensor, and the red light emitted from the light emitting part is captured by the light receiving part as the elevation of the main boom and the extension of the telescopic boom are performed. Elevation movement is limited. At this time, the light source disposed in the vicinity of the light projecting portion has a function of concealing a red light beam emitted from the light projecting portion.

[0007]

1 to 16 show an embodiment of the present invention.
Is a working body, which is composed of a lower traveling body 1a and an upper turning body 1b, and the upper turning body 1b is provided on the lower traveling body 1a so as to be capable of turning operation around a turning shaft 1c by a turning operation mechanism comprising a gear mechanism (not shown). The upper turning body 1b
A main boom 4 that can be raised and lowered around a support shaft 3a by a hydraulic cylinder 3 is provided above the support 2 and a telescopic boom 5 is provided in the main boom 4 by a built-in hydraulic cylinder (not shown). A crane mechanism 6 is provided at the tip of the telescopic boom 5 so as to be capable of telescopic operation.

In this case, the crane mechanism 6 includes the telescopic boom 5
A suspension frame 7 having an inverted gate-shaped cross section is attached to the tip of the suspension frame 7, and a pair of left and right guide sheaves 8a and 8b
The swing frame 10 is arranged on the tip end side of the suspension frame 7 so as to be swingable by a fulcrum shaft 11, and the swing sheave 12 is arranged on the swing frame 10 by a shaft 13. A hydraulic winch 14 is disposed on the support column 2, a steel cable 15 wound by the hydraulic winch 14 is led out from a lead-out sheave 16, and the steel cable 15 is detoured from one of the guide sheaves 8 a to the swing sheave 12, and then the other. Of the steel cable 15 is fixed to the fastening portion 17 of the main boom 4, and a pair of left and right hook sheaves 20 a and 20 b is mounted on a lifting frame 19 having a hook 18 for hanging loads. 21, and hook sheaves 20a and 20b are connected to guide sheaves 8a and 8b.
And the rocking sheave 12 is mounted on the above-mentioned steel cable 15 suspended.

Reference numeral 22 denotes a support member, and the lower traveling body 1
a, the crawler body 2 is attached to each support member 22.
3, a hydraulic motor (not shown) is provided on the crawler body 23, and this hydraulic motor is connected to a hydraulic pump provided on the lower traveling body 1a by a hydraulic hose. 24, in this case, a rubber crawler is wound around.

Reference numeral 25 denotes wheels. In this case, swinging arms 27 which can be moved up and down by a vertically moving cylinder 26 are arranged at front and rear positions of the lower traveling body 1a. The rail driving wheel 25 driven by the motor is attached to two rails.

Reference numeral 28 denotes a mounting stand. In this case, a hydraulic cylinder 29 for height adjustment is erected on the support column 2, and a guide shaft 30 is arranged on the hydraulic cylinder 29 in parallel with the hydraulic cylinder 29.
Mounting rod 28a and the upper end of the guide shaft 30
And the drip-proof cover 31 is provided between the mounting base 28 and the column 2.
And a mounting cylinder 28 is arranged by a hydraulic cylinder 29 so that the height can be adjusted freely.

Reference numeral 32 denotes a photoelectric sensor,
In this case, the light projecting unit 33 includes a red LED that emits a red light beam M, the light receiving unit 34 includes a phototransistor, and the light projecting unit 33 is housed in a cover 35 provided on the mount 28, The light receiving unit 34 is provided inside a cover 36 provided on the side surface of the distal end of the telescopic boom 5, a height limiting circuit 37 is connected to the photoelectric sensor 32, and the hydraulic pressure for raising and lowering the main boom 4 is connected to the height limiting circuit 37. It is connected to a control circuit 38 for controlling a hydraulic cylinder (not shown) for extending and retracting the cylinder 3 and the telescopic boom 5 and to an alarm circuit 39.

In this case, the light emitting section 33 has two red LEDs.
Are arranged side by side, and six phototransistors are arranged in the light receiving portion 34 in two upper and lower stages with three addresses shifted from each other.
A mylar sheet as a diffusing plate 40 is provided on the front side of 4.

The reason why a red LED is employed as the light projecting unit 33 is to facilitate adjustment of the optical axis of the light projecting unit 33 and the light receiving unit 34.

Reference numeral 41 denotes a light source body, for example, a tungsten light bulb is used. In this case, two light sources are mounted on both sides of the cover 35 by brackets 42, and the luminance, illuminance and the like are converted into red light emitted from the light projecting section 33 It is determined based on.

Since this embodiment has the above configuration, FIG.
As shown in FIG.
8 is adjusted up and down, and the height of the optical axis of the red light beam M emitted from the light projecting unit 33 of the photoelectric sensor 32 is set to a predetermined height.
In this state, the crane work is performed. In this crane work, when the main boom 4 is moved by the hydraulic cylinder 3 to the elevation angle or the telescopic boom 5 is moved by the telescopic operation,
When the light receiving unit 34 captures the red light beam M, the height limiting circuit 3
7 sends a stop signal to the control circuit 38,
Thus, the hydraulic cylinder 3 for raising and lowering the main boom 4 and the hydraulic cylinder (not shown) for expanding and contracting the telescopic boom 5 are controlled to be stopped, and the alarm circuit 39 activates an alarm buzzer or the like, and an alarm is issued.

Therefore, by setting the height of the light projecting portion 33 of the photoelectric sensor 32, the protruding height H of the telescopic boom 5 can be limited, and the hanging work around the track can be performed safely. Eliminates the need to visually check the contact relationship between the boom and the electric wire, thereby increasing work efficiency. At this time, since the light source 41 is disposed near the light projecting unit 33, the The light acts to conceal the red light beam M, so that it is possible to prevent a worker from mistakenly interpreting the red light beam M as a red light, and to suppress the occurrence of an unexpected accident due to this erroneous recognition. .

In this case, for example, when the steel cable 15 is wound up by the hydraulic winch 14 from the state shown in FIG. 7, the lifting frame 19 is lifted and raised.
The rocking sheave 12 is made of steel cable 1
5, the lifting frame 19 is lifted up and raised through the state shown in FIG. 4, and as shown in FIG. 8, the rocking sheave 12 is made of substantially steel cable guide grooves 8 of the guide sheaves 8a and 8b.
c, the hook sheaves 20a and 20b can be raised to the side of the guide sheaves 8a and 8b, and the lifting frame 19 can be raised to the side of the guide sheaves 8a and 8b. Accordingly, the lifting height L of the hanging load hook 18 can be increased, and the workability can be improved.

The present invention is not limited to the above embodiment. For example, the structure of the photoelectric sensor 32,
The element structure of the light receiving section 34 and the type of the light source 41 are appropriately changed and designed.

[0020]

As described above, according to the present invention, the light emitted from the light projecting portion is captured by the light receiving portion, and the elevation angle operation of the main boom and / or the expansion / contraction operation of the telescopic boom can be limited by the photoelectric sensor. The light source placed near the light emitting part can prevent the red light emitted from the light emitting part from being mistaken for being a red light, and it can safely carry out hanging work around the track. This eliminates the need for the operator to visually check the contact relationship between the boom and the electric wire, thereby improving work efficiency.

As described above, the intended purpose can be sufficiently achieved.

[Brief description of the drawings]

FIG. 1 is an overall side view of an embodiment of the present invention.

FIG. 2 is an overall side view of the embodiment shown in FIG. 1 during rail running.

FIG. 3 is a rear view of the embodiment shown in FIG. 1;

FIG. 4 is a partial side sectional view of the embodiment shown in FIG. 1;

FIG. 5 is a cross-sectional view of the embodiment shown in FIG.

FIG. 6 is an explanatory view of the steel rope hanging of the embodiment shown in FIG. 1;

FIG. 7 is a partial side sectional view of the embodiment shown in FIG. 1;

FIG. 8 is a partial side sectional view of the embodiment shown in FIG. 1;

FIG. 9 is a partial side sectional view of the embodiment shown in FIG. 1;

FIG. 10 is an overall side view of a use state of the embodiment shown in FIG. 1;

FIG. 11 is a partial side view of the embodiment shown in FIG. 1;

FIG. 12 is a partial cross-sectional view of the embodiment shown in FIG.

FIG. 13 is a partial side sectional view of the embodiment shown in FIG. 1;

FIG. 14 is a partial perspective view of the embodiment shown in FIG. 1;

FIG. 15 is a partial front view of the embodiment shown in FIG. 1;

FIG. 16 is an explanatory diagram of the photoelectric sensor of the embodiment shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Working machine body 1a Lower traveling machine body 1b Upper turning machine body 2 Support 4 Main boom 5 Telescopic boom 6 Crane mechanism 32 Photoelectric sensor 33 Light emitting part 34 Light receiving part 41 Light source body

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI // B60F 1/04 B60F 1/04 B61D 15/00 B61D 15/00 B 15/02 15/02 (72) Inventor Koji Okada 2-14-2 Nishi-Gotanda, Shinagawa-ku, Tokyo M-C Kanto Construction Machinery Co., Ltd. (72) Inventor Haruo Igarashi 256-1 Niizaki, Niigata City, Niigata Prefecture Yamanoi Industry Co., Ltd. (56) References 56-43663 (JP, U) Japanese Utility Model Showa 61-178778 (JP, U) Japanese Utility Model Showa 63-110994 (JP, U)

Claims (1)

(57) [Claims] 1. A work body composed of an upper turning body and a lower traveling body is provided with a track for running on the ground and wheels for rail running, a column is erected on the upper turning body, and a raising operation is possible on the upper part of the column. A main boom is provided, and the main boom is provided with a telescopic boom that can be extended and retracted, and a photoelectric sensor that detects a limit height of the boom is disposed, and the photoelectric sensor emits a red light beam. And a light receiving unit, wherein a light source is arranged near the light projecting unit to prevent a red light emitted from the light projecting unit from being mistaken for being a red signal.