JPH06156980A - Collision alarming device for transfer vehicle - Google Patents

Abstract

PURPOSE:To improve safety through prevention of the occurrence of a collision accident by supporting an arm, curving along with collision to operate an alarm device and having a returnable function, to a transfer vehicle. CONSTITUTION:When an arm 14 protruded during movement of a moving crane 1 is collided with a shelf object present in the vicinity of a rail 6, a pantograph type arm 14 is curved to rotate a rotary shaft 128. A rotary drum 122 is raised as it is rotated. The rotary shaft 128 is raised as it is caused to compress a coil spring 130 to operate a limit switch. In which case, a transmitter 17 is operated and a buzzer 16A is sounded by a receiver 18. Further, the raised rotary shaft 128 is lowered to an original position through the return action of the coil spring 130 thereafter compressed, and the rotary drum 122 is also lowered as it is rotated, the rotary drum being returned to an origin position. As a result, the curved arm 14 is returned to an original pantograph form. This constitution prevents the occurrence of a collision accident.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collision warning device for a transfer vehicle, and more particularly to a collision warning device for a bridge-type mobile crane traveling on rails.

[0002]

2. Description of the Related Art A conventional bridge type mobile crane is provided with a guide girder for horizontally guiding a movable jib crane, a pair of legs supporting both sides of the guide girder, and a lower part of each of the pair of legs. , Equipped with a traveling platform that travels on the laid rail, operation of the operator room, wireless hand operation,
Or, it is operating by a pendant type hand operation.

[0003]

Since the conventional bridge type mobile crane is constructed as described above, it is not possible to sufficiently avoid the risk of colliding with an abandoned object or an obstacle existing near the rail when moving. , But could not improve safety. The use of a sound wave sensor, a temperature sensor, or the like can be considered as a means for preventing this collision, but these malfunction easily due to the influence of wind force, direct sunlight, etc., and are not suitable for practical use at all.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a collision warning device for a transfer vehicle capable of improving safety by preventing a collision accident.

[0005]

In the present invention, in order to achieve the above-mentioned object, a transfer vehicle is supported by an arm having a function capable of bending and flexibly operating an alarm device in response to a collision and returning. It is characterized by that.

[0006]

According to the present invention, when the arm of the bridge-type mobile crane collides with an abandoned object or an obstacle near the rail, the arm bends to operate the limit switch, and the limit switch operates the alarm device. The alarm device informs the operator or the operator of the operator room of the danger of collision of the bridge-type mobile crane by the sound emitted.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment shown in FIGS. 1 to 6 (a) and (b).
As shown in FIG. 2, a guide girder 3 for guiding the moving jib crane 2 horizontally, a pair of A-shaped legs 4 supporting both sides of the guide girder 3, and a pair of legs 4 are provided under the pair of legs 4, respectively. An operator room 9 provided on the upper part of the leg 4 with a traveling platform 8 pivotally supporting a plurality of wheels 7 traveling on the rail 6 based on the drive of a traveling motor (not shown) housed in the motor cover 5. Is operated, the pendant 10 suspended from the guide girder 3 is operated, or the wireless operation is performed. In addition, at the lower part of the front and rear ends of the plurality of traveling platforms 8, there is a protrusion (not shown) for preventing a collision with another bridge type mobile crane 1 arranged on the rail 6, which is horizontal in the direction of the rail 6. Is projected on.

Reference numeral 11 denotes a substantially semi-circular housing which is attached to the upper portions of the front and rear ends of the plurality of traveling bases 8 by way of grooved steel. The housing 11 located above the above-mentioned protruding portion is shown in FIG. As shown in FIG. 4, it is configured as a bottomed cylinder, and a pair of adjoining support mechanisms 12 and a limit switch (not shown) are arranged inside, and the upper opening thereof prevents dust from entering. It is adapted to be loosely fitted in a lid 13 which is swingable in the vertical direction.

The pair of support mechanisms 12 are shown in FIGS. 4 to 6 (a),
As shown in (b), the fixed drum 120 having a cylindrical shape.
And a plurality of notches 121 formed in the upper peripheral edge of the fixed drum 120 and having a bottom angle of 90 °, and a cylindrical rotary drum 1 superposed on the fixed drum 120.
22 and a plurality of triangular protrusions 123 that are provided on the lower peripheral edge of the rotary drum 122 and that fit into the notches 121.
The cover 12 that covers the fixed drum 120 and the rotating drum 122 in the vicinity of the overlapping portion and that supports these 120 and 122.
4, a bearing 125 fitted in the lower opening of the fixed drum 120, a spring washer 126 arranged on the upper surface of this bearing 125, a bearing 125A fitted in the upper opening of the fixed drum 120, and this bearing 125A. Spring washer 1 superposed on the underside of the
26A, a washer 127 fitted to the upper opening of the rotary drum 122, a washer 127A fitted to the lower opening of the rotary drum 122, and washers 127 and 127A.
And a rotatable upper part of the rotating shaft 128, which is inserted into the bearings 125 and 125A and whose bent upper part is located in front of the front of the housing 11 via a gap between the upper part of the housing 11 and the lid 13. The washer 1 fitted in the screw rod portion 128a protruding through the bearing 125.
27B, a nut 129 screwed into the threaded rod portion 128a of the rotary shaft 128 and supporting the washer 127B, and the rotary shaft 1
It is fitted in the screw rod portion 128a of 28 and is located between the bearing 125 and the washer 127B, and is configured by a coil spring 130 that elastically biases the rotating shaft 128 downward and absorbs vibration.

Further, the limit switch is arranged above the rotary shaft 128 via a bracket (not shown), and is operated as the rotary shaft 128 rises. In this embodiment, a pair of support mechanisms 12 are provided inside the housing 11.
And the limit switch is shown, the interior of the housing 11 may be filled with oil, water, or the like to precipitate the dust that has entered the bottom of the housing 11.

Reference numeral 14 denotes a plane substantially pantograph-shaped arm connected to the pair of support mechanisms 12, and the arm 14 has a joint pipe at the bent upper end of the rotary shafts 128, 128 as shown in FIGS. And a pair of pipes 140 connected horizontally through the pair of pipes 140
A pair of pipes 140A pivotably attached to the free end of 140 via hinges 141 and 141 and the ends of which are pivotally attached to each other via hinge 141A. It is positioned immediately above and bends when a collision occurs with an abandoned object, an obstacle or the like so that the rotary shaft 128 operates a limit switch. The pipes 140 and 140A are made of fragile members.

Reference numeral 16 is a buzzer which is an alarm device attached to the upper front part of the housing 11, and 17 is a transmitter provided under the pair of legs 4, respectively. The buzzer 16 and the transmitter 17 are electrically connected. It operates based on the operation of the limit switch described above. Reference numeral 18 is a receiver installed on the outer wall of the operator room 9, and 16A is a buzzer which is an alarm device installed on the outer wall of the operator room 9, and is designed to ring based on a signal input from the receiver 18.

Therefore, when the arm 14 projecting during the movement of the bridge type mobile crane 1 collides with an abandoned object, an obstacle or the like (not shown) existing near the rail 6, the pantograph-shaped arm 14 bends. The rotary drum 128 is bent to rotate the rotary shafts 128, and the rotary drum 122 is notched with this rotation 1
While being guided by the hypotenuse 21 and rotating, it rises, and with this rising, the rotating shafts 128, 128 rise while compressing the coil spring 130 to operate the limit switch. Then, the buzzer 16 and the transmitter 17 operate, and the receiver 18 which receives the signal from the transmitter 17 causes the buzzer 16A to ring. The rotating shafts 128, 128 that have risen descend to their original positions due to the returning action of the coil spring 130 that has been compressed thereafter.
While being guided by the hypotenuse of No. 1, it descends while rotating and returns to its original position. By this return, the bent arm 14 returns to the original pantograph form.

However, the operator or worker in the operator room 9 detects the danger of a collision by hearing the sound of the buzzers 16 and 16A and operates the equipment in the operator room 9 or the pendant 10 to move. The bridge-type mobile crane 1 is stopped to prevent a collision accident from occurring in advance.

As described above, according to the present invention, the buzzers 16 and 16A ring to warn the occurrence of an accident as the pantograph-shaped arm 14 bends over the entire contact range, so that a plurality of observers can be alerted. It is possible to eliminate the need for guards and guards, and it is possible to significantly improve safety by reliably preventing collision accidents.

Further, since there is a time margin from the start of the collision of the arm 14 to the collision of the arm 14 having the maximum bending with the housing 11, the worker, the abandoned object, or the obstacle collided with the arm 14 retreats. Alternatively, sufficient time to avoid can be secured.

Since no expensive sound wave sensor, temperature sensor or the like that malfunctions easily is used, the manufacturing cost can be remarkably suppressed.

Furthermore, since the arm 14 having the antennal function is easily bent at the time of a collision and is composed of a fragile member, it is possible to surely prevent the worker collided with the arm 13 from being injured. it can.

Furthermore, since the notch 121, the projection 123, and the coil spring 130 return the bent arm 14 to the original pantograph form, the worker bends the arm 14 back to the pantograph form at each collision. It is possible to omit the troublesome work.

Further, since the lid 13 surely prevents dust from entering the inside of the housing 11, the function of the limit switch can be maintained for a long period of time.

In the above embodiment, the pantograph type arm 14 is used, but the present invention is not limited to this. In the above embodiment, the pipes 140 and 14
Although the structure in which the arm 14 is simply configured from 0A is shown, yellow and black are alternately applied to the pipes 140 and 140A to encourage attention, and characters such as "contact caution" are printed on the pipes 140 and 140A. Even if the well-known vinyl sheet or the like is hung, the same operational effect as that of the above-described embodiment can be obtained. In the above embodiment, the arms 14 are supported at the front and rear ends of the traveling platform 8, respectively.
A striation extending along the side surface of the traveling platform 8 is stretched between the hinges 141, 141 of the fourteenth portion, and a member for supporting and guiding the strip is provided on the side surface of the traveling platform 8 so as to project from the arm. Even if the role is fulfilled and the contact range of the arm 14 is substantially expanded, the same operation and effect as those of the above-described embodiment can be obtained. Further, in the above embodiment, the buzzers 16 and 16A are provided in the housing 11 and the operator room 9, but it is needless to say that the buzzers 16 and 16A may be alternatively used or may be centrally arranged in the operator room 9. Yes. Furthermore, in the above embodiment, the one used for the bridge type mobile crane 1 is shown, but the present invention is not limited to this as long as it is a transfer vehicle.

[0022]

As described above, according to the present invention, the buzzer sounds to warn the occurrence of an accident with the bending of the pantograph-shaped arm whose contact range extends in all directions. There is an effect that the number of workers can be eliminated and the safety can be greatly improved by surely preventing a collision accident.

Further, since there is a leeway from the start of the collision of the arm to the collision of the most flexed arm with the housing, the operator, the abandoned object, or the obstacle collided with the arm has time to withdraw or avoid. The effect is that it can be sufficiently secured.

Since no expensive acoustic wave sensor, temperature sensor or the like that malfunctions easily is used, the manufacturing cost can be remarkably suppressed.

Further, since the arm having the antennal function is easily bent at the time of a collision and is composed of a member which is easily broken, it is possible to surely prevent an operator collided with the arm from being injured. effective.

Furthermore, since the arm in which the notch, the protrusion and the coil spring are bent is returned to the original pantograph form, the operator must perform the complicated work of returning the bent arm to the pantograph form at each collision. The effect is that it can be omitted.

Further, since the lid surely prevents dust from entering the inside of the housing, there is an effect that the function of the limit switch can be maintained for a long period of time.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of a collision warning device for a transfer vehicle according to the present invention.

FIG. 2 is a plan view of an essential part showing an embodiment of the collision warning device for a transfer vehicle according to the present invention.

FIG. 3 is a front view of FIG.

FIG. 4 is a side view of FIG.

FIG. 5 is a perspective view showing a support mechanism.

6 (a) and 6 (b) are exploded perspective views of FIG.

[Explanation of symbols]

 1 bridge type mobile crane 4 legs 7 wheels 8 traveling platform 12 support mechanism 14 arm 16 ・ 16A buzzer (alarm device) 17 transmitter 18 receiver

Claims (1)

[Claims] 1. A collision warning device for a transfer vehicle, comprising: an arm having a function capable of returning to the transfer vehicle by flexing in response to a collision to operate the alarm device and returning the alarm device.