JPS6323432Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a vehicle-type crane such as a truck crane used for construction work, and more particularly to a vehicle-type crane equipped with an overload prevention device for preventing overload during crane work.

In vehicle-type cranes such as truck cranes, the vehicle body is supported by outriggers during crane work. A pair of these outriggers are usually provided on each side of the vehicle body, and the operation of extending and retracting these outriggers is performed using operating levers or operating switches provided on both sides of the vehicle body.

By the way, in this type of vehicle type crane, the permissible lifting load during crane work is greatly influenced by the overhanging state of each of the outriggers, that is, the overhang length of each of the outriggers. For this reason, conventionally, in addition to a crane operating lever for operating the crane, an outrigger state setting switch is provided in the crane cab on the swivel base. This outrigger state setting switch inputs the extended state of each outrigger as data to the overload prevention device, thereby increasing the safety of crane work.

In addition, the outrigger status setting switches mentioned above are placed on the left and right, respectively, with the crane in the running position, that is, with the crane cab facing forward of the vehicle body, and the outrigger status setting switch on the left side inputs the extended state of the left outrigger of the vehicle body. The outrigger status setting switch on the right side allows you to input the extended state of the right outrigger on the vehicle body.

However, in actual crane work, the above-mentioned swivel base is rotated on the car body according to the work, so when inputting each outrigger state setting switch after extending the outriggers, the above-mentioned The crane cab is not always in a running position facing forward of the vehicle body. In other words, for an operator in the crane cab, there may be cases where the left and right sides of the outrigger state setting switch viewed from the operator's position do not match the left and right sides of the outriggers on the vehicle body. Therefore, in such a case, it is easy for the operator to make a mistake in the correspondence between the outrigger to be set and the outrigger status switch, and there is a risk that erroneous data may be input to the overload prevention device.

This idea was developed based on these circumstances, and its purpose is to easily associate the outrigger status setting switch in the crane cab with the outriggers on the left and right sides of the vehicle, regardless of the swivel position of the swivel base. To provide a vehicle type crane with an overload prevention device capable of preventing erroneous operation of an outrigger state setting switch.

That is, in this invention, a first identification symbol is attached to the beam side surface of the first outrigger on one side of the vehicle body and a first outrigger state setting switch that sets the extended state of the first outrigger, respectively, and the first identification symbol is associated with the beam side surface of the first outrigger on one side of the vehicle body. The beam side surface of the second outrigger on the side and the second outrigger state setting switch for setting the extended state of the second outrigger are each given a second identification symbol different from the first identification symbol to make them correspond to each other. It is something to do.

An embodiment of this invention will be described below with reference to FIGS. 1 to 3.

Fig. 1 shows a truck crane, in which 1 is a car body, 2 is a swivel stand on the car body 1, 3 is a telescopic boom pivotally mounted on the swivel stand 2 via a pivot 4, and 5 is a retractable boom. The undulating cylinder 6 of the boom 3 indicates a driving cab for making the vehicle body 1 travel.

A crane cab 7 is mounted on the swivel base 2.
is provided, and crane operations such as rotating the swivel base 2, extending and contracting the boom 3, raising and lowering the boom 3, and feeding and winding a lifting wire (not shown) are performed from within the crane cab 7. . Therefore, as shown in FIG. 3, the crane cab 7 is provided with crane operating levers 8 for carrying out each of the above-mentioned crane operations. In addition, 9 in Fig. 3 is the crane cab 7.
Showing the seats inside.

Therefore, when operating the crane from inside the crane cab 7, the vehicle body 1 is supported by the outriggers. That is, as shown in FIGS. 1 and 2, first outriggers 10, 10 and second outriggers 11, 11 are provided on both sides of the vehicle body 1.
are provided for each. These outriggers 1
0, 10 and 11', 11 are respectively extended to the sides of the vehicle body 1, and the ground plates 1
The vehicle body 1 is supported by grounding each of the parts 2 and 2 to the ground. In addition, when the outriggers are not used such as when driving, each outrigger 10, 10 and 11,
It goes without saying that 11 is housed within the vehicle body 1, and furthermore, each outrigger 10, 10 and 11,1
1 is extended and retracted by outrigger operation parts 20, 20, which are comprised of outrigger levers or outrigger switches, etc., arranged on both sides of the vehicle body 1.

On the other hand, inside the crane cab 7, first and second outrigger state setting switches 13 and 14 are installed on their panels, respectively, for setting the extended state of each outrigger 10, 10 and 11, 11 to the overload prevention device 30. They are placed adjacent to each other on the left and right. Regarding these first and second outrigger state setting switches 13 and 14, one of the first outrigger state setting switches 13 can input data on the extended state of the first outriggers 10 and 10 to the overload prevention device 30, and the other The second outrigger state setting switch 13 allows data on the extended state of the second outriggers 11, 11 to be input to the overload prevention device 30. Further, in this case, each outrigger state setting switch 13, 14 is configured to switch the overhanging length of the outrigger into three levels, large, medium, and small, and input the same to the overload prevention device 30.

The overload prevention device 30 not only inputs data on the extended state of each outrigger 10, 10 and 11, 11, but also inputs information such as the swivel position of the swivel base 2, the boom length of the boom 3, and its luffing angle. Data is input, which causes the overload protection device 30 to
By calculating and determining the allowable lifting load of the crane based on this data, crane work can be performed safely.

In this embodiment, the beam side surfaces of the first outriggers 10, 10 and the first outrigger state setting switch 13 are colored, for example, red as a first identification symbol. This red coloring is indicated by diagonal lines extending downward to the left in FIGS. 2 and 3. In addition, the second outrigger 11,
The side surfaces of the beams 11 and their second outrigger state setting switches 14 are colored, for example, in blue as second identification symbols. This blue coloring is indicated by diagonal lines extending downward to the right in FIGS. 2 and 3. In addition, in Figure 2,
The first and second identification symbols are first outriggers 10, 10 and second outriggers 11, 11, respectively.
Although the identification symbols are shown as if they were placed on the upper surface of the beam, this is for convenience of illustration in order to display each identification symbol in FIG. 2; in reality, they are formed on the side of the beam of each outrigger.

Therefore, according to such an embodiment, the first outriggers 10, 10 and the second outrigger state setting switch 13 are colored the same red, and the second outriggers 11, 11 and the second outrigger state setting switch 13 are colored the same red. Since the setting switch 14 and the setting switch 14 are colored in the same blue color, the correspondence between the first outriggers 10, 10 and the first outrigger state setting switch 13 can be maintained regardless of the turning posture of the swivel base 2, that is, the crane cab 7. 2 outriggers 11, 11 and 2nd
Correlation with the outrigger state setting switch 14 becomes easy and reliable. That is, to describe in more detail, the extended state of the outriggers 10, 10 and 11, 11 is controlled by the overload prevention device 30 by the first and second outrigger state setting switches 13, 14.
When setting, first check the color of the outriggers 10, 11 whose extended state is to be set, and then switch the outrigger state setting switches 13, 14 of the same color according to the extended state. Therefore, the extended state of the outriggers 10 and 11 can be set correctly in the overload prevention device 30 without being confused by the turning attitude of the crane cab 7. As a result, there is no danger that the vehicle body 1 will lack stability due to inaccuracy of the overload prevention device 30 due to incorrect operation of the outrigger state setting switches 13 and 14, and the safety of crane work can be improved.

Note that this invention is not limited to the above embodiment. For example, the identification symbol for each outrigger and outrigger status setting switch is not limited to being colored, but colored tape 15 may be attached to the outrigger beam 16 and its outrigger status setting switch, respectively, as shown in FIG. Various modifications are possible, such as:
In addition, as shown in Fig. 4, the outrigger 1
When the beam 16 of 0 or 11 is at its maximum extension, the two tapes 15, 15 are visible at the same time, and when the beam 16 is at approximately the intermediate extension, the two tapes 15, 15 are visible at the same time, as shown in FIG. If the arrangement and length of the tapes 15, 15 are set so that only one tape 15 is visible, and furthermore, both tapes 15, 15 are not visible when the beam 16 is at its most contracted state,
These tapes 15, 15 have the effect that the overhanging length of the outriggers can be checked at the same time.

Moreover, outriggers 10, 10 and 11, 1
Since the identification symbol 1 is provided on the side of the beam of each outrigger, such a side surface is easy to see from inside the crane cab 7 that has been moved far away, and it also prevents the identification symbol from peeling off or lubricating due to sliding with the outrigger outer cylinder. Since the area is not contaminated by chemicals, the display can be displayed for a long period of time.

Furthermore, in the above embodiment, one outrigger state setting switch was used to set the extended state of two outriggers on one side of the vehicle body, but two independent outrigger state setting switches were used to set the extended state of these two outriggers. You may also set it.

Furthermore, if the outrigger levers or outrigger switches of the outrigger operating units 20, 20 are provided with the same identification symbols as the corresponding outriggers, the outrigger extension and storage operations will be made easier.

Furthermore, although the above embodiment is applied to a type of crane in which the outrigger operating sections 20, 20 are provided on both sides of the vehicle body 1, the outrigger operating sections may be installed in a crane cab. Needless to say, the present invention can be applied not only to truck cranes but also to other vehicle type cranes.

As explained above, this invention associates the beam side surface of the first outrigger and its first outrigger state setting switch with the first identification symbol, and also associates the beam side surface of the second outrigger and its second outrigger state setting switch with the first outrigger state setting switch. Since the second identification symbol is different from the first identification symbol, it is possible to easily and accurately set the extended state of each outrigger to its overload prevention device without being confused by the turning position of the swivel base. This makes crane work safer. Furthermore, since the identification symbol of each outrigger is provided on the side of the beam, there are advantages such as easy visibility even when the crane cab is moved far away.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of this invention, with Figure 1 being a side view of the truck crane, Figure 2 being a plan view of the truck crane, Figure 3 being a cross-sectional view showing the inside of the crane cab, and Figure 3 being a cross-sectional view showing the inside of the crane cab. 4 to 6 are partial side views of outriggers showing modified examples. 1... Vehicle body, 2... Swivel base, 7... Crane cab, 10... First outrigger, 11... Second outrigger, 13... First outrigger state setting switch, 14... Second outrigger state setting switch.

Claims (1)

[Scope of utility model registration request] First and second outriggers are extendably provided on both sides of the vehicle body, and a crane cab for operating the crane is provided on the swivel platform of the vehicle body.
In a vehicle-type crane with an overload prevention device, which is equipped with first and second outrigger state setting switches for inputting the overhang length of the outrigger as data for the overload prevention device, the side surface of the beam of the first outrigger and the first outrigger A first outrigger state setting switch for setting the extended state is provided with a first identification symbol corresponding to each other, and a beam side surface of the second outrigger and a second outrigger state setting switch for setting the extended state of the second outrigger are provided. 1. A vehicle-type crane with an overload prevention device, characterized in that second identification symbols corresponding to each other but different from the first identification symbol are given respectively.