JPH0175092U - - Google Patents

Description

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, and FIGS. 1 to 7 show Embodiment 1, FIG. 1 is an overall side view of a crane truck with a loading platform, FIG. 2 is a plan view thereof, and FIG. The figure is a front view of the main parts along the - line in Figure 2, Figure 4 is an explanatory diagram of the forward position detection device, Figure 5 is an explanatory diagram of the lateral position detection device, and Figure 6 is the stabilization leg detection device. 7 is a block diagram of the crane overload safety device, FIGS. 8 and 9 show Example 2, FIG. 8 is an explanatory diagram of the main part, and FIG. 9 is a diagram of the main part. FIG. DESCRIPTION OF SYMBOLS 1... Crane device, 2... Crane truck with loading platform, 4... Loading platform, 7... Left stabilizing leg, 8... Right stabilizing leg, 9... Swivel device, 10... Swivel post, 11...
...Boom, 15...Overload safety device, 16...Boom rotation direction detection means, 17...Safety leg extension detection means, 18...Boom load detection device, 19...
Loading state detection means, 21...front position detection device,
22... Side position detection device, 23... Detection switch (front position), 24... Cam plate (front position),
25...Detection switch (side position), 26...Cam plate, 28...Port stabilizing leg detection device, 29...Starboard stabilizing leg detection device, 35...Port protruding cam, 3
6... Starboard protruding cam, 37... Port detection switch, 38... Starboard detection switch, 41... Detection member, 42... Alarm member, 55, 56... Switch (for selection switching), 70... Bourdon tube, 75,7
6, 77, 78... Non-contact switch row.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a crane truck with a loading platform, in which a crane equipped with stable legs and a boom that can be raised and retracted on a swing post is mounted on a traveling vehicle having a loading platform, the direction of rotation of the boom; boom direction detection means for detecting the overhang of the stabilizer legs, stabilization leg extension detection means for detecting the extension work state of the stabilizer legs, loading state detection means for detecting the loading state of cargo on the loading platform, and boom load detection means for detecting whether the boom load has reached each boom load, and one of the plurality of rated loads based on detection signals from the boom direction detection means, the stabilizing leg extension detection means, and the loading state detection means. The present invention is characterized by comprising: rated load selection means for selecting a rated load that is allowable for crane work from among the rated load selection means; and alarm means for issuing a warning when the boom load reaches the rated load selected by the rated load selection means. Overload safety device for cranes. (2) The boom direction detection means is comprised of a side position detection device that detects the left and right side boom positions including the rear position, and a front position detection device that detects the front boom position. Crane overload safety device. (3) The loading state detection means shall be used at least when the vehicle is empty;
The overload safety device for a crane according to claim 1, which comprises a changeover switch for selecting loading and unloading. (4) The crane overload safety device according to claim 1, wherein the boom load detection means includes a plurality of pressure switch groups having set pressures corresponding to multiple stages of rated loads. (5) The crane overload safety device according to claim 1, wherein the boom load detection means includes a plurality of non-contact switch groups that operate at set pressures corresponding to multiple stages of rated loads.