JPH0756302Y2 - Hoist load detection device - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a load detection device for a hoist.

B. Outline of the Invention In this load detecting device of the hoist, one side of the suspension pin inserted in the wire rope fixing member is supported by a spherical roller bearing, and the load provided at the end of the suspension pin with this bearing as a fulcrum. When the load is measured by the detector, the wire rope fixing member is configured so as not to move in the axial direction of the hanging pin, so that the fulcrum for load detection can be stabilized and the load can be detected with high accuracy. It was done like this.

C. Prior Art FIG. 2 is a schematic configuration diagram of a hoist. In FIG. 2, 20 is a hoist body, and the hoist body 20 is composed of a motor and a drum around which a wire rope is wound. A load detection device 21 is provided on the hoist body 20.
Reference numeral 22 is a wire rope, and the load detection device 21 is connected to an end portion of the wire rope 22. 23 is a pulley and 24 is a hook.

FIGS. 3A and 3B are a front view and a side view showing a part of the details of the load detection device 21 shown in FIG. 2, and in FIGS. 3A and 3B, 31 and 32 are fixed to the hoist body 20. With this hanger plate with U-shaped groove,
Are arranged at regular intervals. Hanger plate 31,3
The hanging pin 33 is placed in the U-shaped groove of 2. A wire rope fixing member 34 to which the end of the wire rope 22 is fixed is inserted into the suspension pin 33. Reference numeral 35 is a load detector.The end of the suspension pin 33 is brought into contact with the load detector 35, and when the wire rope fixing member 34 is pulled by the wire rope 22 in the direction of the arrow 36 in the drawing, the suspension pin 33 is illustrated. Load detector moving in the direction of arrow 37
Press 35. This detects the load.

D. Problems to be Solved by the Invention In the load detecting device shown in FIGS. 3A and 3B, the hanging pin 33 has two functions, and the first function is to support the load through the wire rope fixing member 34. The second function is to apply the load of the load to the load detector 35 via the suspension pin 33.
However, the hanging pin 33 shown in FIGS. 3A and 3B is the hanger plate 3
Since the wire rope fixing member 34 was only inserted and placed in the U-shaped groove of 1,32, the position of both the hanging pin 33 and the wire rope fixing member 34 was unstable, and both of them moved axially. I will end up. As a result, the fulcrum on which the load is applied becomes unstable, the load is not accurately applied to the load detector 35, and the load cannot be detected with high accuracy. In addition, there is a problem that the contact pressure between the hanger plate 31 and the hanging pin 33 increases and the part wears.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a load detector for a hoist capable of detecting a load with high accuracy and eliminating wear of a suspension pin and a hanger plate.

E. Means for Solving the Problems The present invention is a hoist provided with a load detector for detecting a load applied to a hoist body, and a hanger plate which is arranged opposite to each other and fixed to the hoist body, and the hanger plate. Spans through,
A suspension pin with a penetrating part of one hanger plate freely formed, and a spherical roller bearing that is mounted on the penetrating part of the other hanger plate where this hanging pin is not penetrated and supports the hanging pin, and this bearing is a fulcrum. As the end of the suspension pin is arranged at a position where it descends, a load detector that detects a load, the wire rope is inserted through the suspension pin, and a wire rope fixing member that fixes the end of the wire rope derived from the hoist body, The suspension pin is provided between the fixing member and the hanger plate, and the regulating member is provided so as to prevent the fixing member from moving in the axial direction of the suspension pin.

F. Action The wire rope fixing member does not move in the axial direction of the suspension pin even when a load is applied.Besides, since the suspension pin is supported on the hanger plate by the spherical roller bearing, the position of the suspension pin fulcrum It will not shift. As a result, an accurate load is applied to the load detector via the suspension pin.

G. Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numerals 1 and 2 denote first and second hanger plates that are fixed to a hoist body (not shown).
A suspension pin 3 is inserted between the first and second hanger plates 1 and 2. The suspension pin 3 is supported by the first hanger plate 1 via a spherical roller bearing 4. 5 is a spherical roller bearing 4
Is an attachment member for attaching to the first hanger plate 1. The insertion portion of the second hanger plate 2 through which the hanging pin 3 is inserted is formed in a loose state, and a gap 6 is provided as shown in the drawing. The ends of the suspension pins 3 are brought into contact with the load detector 7.

Reference numeral 8 is a wire rope fixing member for fixing the end portion of the wire rope drawn out from the hoist body. The wire rope fixing member 8 is inserted into the hanging pin 3 and is almost at the center of the first and second hanger plates 1 and 2. Is installed in. On both sides of the wire rope fixing member 8, the first and second members that restrict the movement of the fixing member 8 are provided.
The collars 9 and 10 are provided by being inserted into the hanging pins 3.

In the embodiment configured as described above, since the suspension pin 3 is supported by the spherical roller bearing 4, the suspension pin 3 is in the state as illustrated when no load is applied. Here, when the load Wg is applied to the wire rope fixing member 8, a load is applied to the end portion of the suspension pin 3 in the direction of the arrow 11 shown in the figure, and the wire rope fixing member 8 moves downward in the figure. At this time, since the suspension pin 3 is supported by the spherical roller bearing 4, the fulcrum does not move. In addition, both sides of the wire rope fixing member 8 are the first and second
The fixing member 8 does not move in the axial direction because the movements in the axial direction are restricted by the collars 9 and 10. From these facts, the load detector 7 can detect a highly accurate load value. Since the spherical roller bearing 4 is provided between the suspension pin 3 and the first hanger plate 1, the suspension pin 3 and the first hanger plate 1 are not worn.

H. Effect of the Invention As described above, according to the invention, it is possible to detect the load with high accuracy and prevent the components from being worn.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a hoist, and FIGS. 3A and 3B are partial front views and side views showing details of a load detecting device. It is a figure. 1,2 …… First and second hanger plates, 3 …… Hanging pins,
4 ... Spherical roller bearing, 7 ... Load detector, 8 ... Wire rope fixing member, 9,10 ... First and second collars.

Claims (1)

[Scope of utility model registration request] 1. A hoist having a load detector for detecting a load applied to the hoist body, the hanger plate being opposed to each other, fixed to the hoist body, and straddling the hanger plate.
A suspension pin with a penetrating part of one hanger plate freely formed, and a spherical roller bearing that is mounted on the penetrating part of the other hanger plate where this hanging pin is not penetrated and supports the hanging pin, and this bearing is a fulcrum. As the end of the suspension pin is arranged at a position where it descends, a load detector that detects a load, the wire rope is inserted through the suspension pin, and a wire rope fixing member that fixes the end of the wire rope derived from the hoist body, A load detecting device for a hoist, comprising: a restricting member that is mounted on the suspension pin between the fixing member and the hanger plate and that prevents the fixing member from moving in the axial direction of the suspension pin.