JPS6241035Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an improvement of an electric hoist, in particular, a frame body that substantially surrounds the outer peripheral surface of the hoist with a predetermined gap and connects a hoisting motor and a reduction gear to both ends of the hoist. The present invention relates to an improvement in a rope end coupling member support mechanism that swingably supports a rope end coupling member coupled to one end of a wire rope.

This type of support mechanism, which has been generally known in the past, will be explained with reference to FIGS. 1 to 4. In the figure, 1
1 is a frame formed of a steel plate, and 1a and 1b are a pair of connecting plates provided facing each other at both ends of the frame 1 in the longitudinal direction, and a through hole 1C is provided approximately at the center thereof. 1d is a connecting member formed in a substantially arc shape with both ends welded to the inner end surfaces of the pair of connecting plates 1a and 1b, and 1e is a soldering portion formed on the upper part of the pair of connecting plates 1a and 1b, respectively. A pair of through-holes 1f are provided which face each other by a pair of connecting members welded to the inner end surface of the connecting member 1d. In addition, on the outer end surface of each of the pair of coupling members 1e, there are a pair of double-threaded bolts (not shown) passing through each pair of through-holes 1f, and washers and nuts (not shown) that fit into the pair of double-threaded bolts, respectively. A pair of side plates (not shown) are connected by a pair of side plates (none of which are shown). Further, a hoisting motor and a speed reduction device (both not shown) are coupled to the pair of coupling plates 1a and 1b, respectively. In addition, the winding drum (not shown) connected to the speed reduction device has an inner end surface of the pair of coupling plates 1a, 1b and the coupling member 1d,
It is substantially surrounded by the inner peripheral surface with a predetermined gap therebetween. Reference numeral 2 denotes a support member made of channel steel, and both ends in the longitudinal direction are welded to the inner end surfaces of the pair of coupling plates 1a and 1b, respectively. Reference numeral 3 designates a pair of hanging members welded together facing each other at a predetermined distance in the longitudinal direction of the supporting member 2, which are substantially perpendicular to the longitudinal direction of the supporting member 2 and located on the U-shaped inner circumferential surface of the supporting member 2. are joined by continuous welding. Note that the hanging member 3 is provided with opposing through holes 3a, respectively. Reference numeral 4 denotes a support shaft whose both ends are fitted into a pair of through holes 3a, and 5 is a wire rope end coupling member in which the through hole 5a provided at one end loosely fits into the support shaft 4, and the support shaft 4 provided at the other end. The other end of the wire rope 6 is connected to the bottomed hole (not shown), one end of which is supported and wound around the winding drum, and whose middle part suspends a hook block (not shown). has been done. A is the outer diameter of the body of the winding drum, B is the gap between the body of the winding drum and the inner peripheral surface of the coupling member 1d, C is the inner circumference of the coupling member 1d, and L is the center of rotation of the winding drum. and the vertical distance from the axis of the support shaft 4,
D is the dimension in the width direction of the pair of coupling plates 1a and 1b. The axis of the support shaft 4 is located approximately on an extension of the tangent to the outside diameter of the body.
Further, the directions of arrows E and E are the directions of load swing.

The support mechanism for the rope end coupling member 5 of the conventional electric hoist is constructed as described above. In particular, the support member 2 is formed of channel steel, and the upper end surface of the channel steel is aligned with the horizontal center line of the rotation center of the hoist. Since it is disposed substantially parallel to the winding drum, the perpendicular distance L between the center of rotation of the winding drum and the axis of the support shaft 4 becomes large. In addition, in order to reduce this vertical distance L, it is possible to increase the dimension D in the width direction of the pair of connecting plates 1a and 1b of the frame 1, but as the pair of connecting plates 1a and 1b become larger, As a result, the overall size of the frame 1 has increased, resulting in an increase in the manufacturing cost of the frame 1 and an increase in the weight of the electric hoist.

This invention was made in an attempt to eliminate such drawbacks, and one embodiment of this invention will be described with reference to FIG. In the figure, reference numeral 2 denotes a support member made of equilateral angle iron, and both end surfaces in the longitudinal direction are welded to the respective inner end surfaces of a pair of coupling plates 1a and 1b, and one side has a predetermined gap with the outer peripheral surface of the body of the winding drum. are arranged so as to be substantially in contact with the inner circumferential surface of the coupling member 1d so as to face each other via the winding drum, and the top portion thereof is arranged to substantially coincide with the perpendicular direction of the outer circumferential surface of the drum with respect to the horizontal center line of the winding drum. being done. Reference numeral 3 designates a pair of suspension members welded to the conical inner circumferential surface of the support member 2. The rest of the configuration is the same as that of a conventional electric hoist, so a description thereof will be omitted. In this embodiment, the support member 2 is made of equilateral angle steel, but it may be made of scalene angle steel. Further, in this embodiment, the suspension members 3 are described as a pair, but a single suspension member 3 may be used.The intermediate portion of the support shaft 4 is connected to the through hole 3a provided in the suspension member 3, and a rope is attached to both ends. The end coupling member 5 may be swingably supported.

As explained above, in this invention, the supporting member is formed of a steel material having a substantially L-shaped cross section, and one side of the L-shaped cross section is inside the frame surrounding the outer peripheral surface of the body of the winding drum through a predetermined gap. Since it is disposed so as to be substantially in contact with the circumferential surface, it is possible to reduce the vertical distance between the rotation center of the winding drum and the axis of the support shaft without changing the external dimensions of the frame.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional electric hoist rope end coupling member support mechanism, Fig. 2 is a partial front view of Fig. 1, Fig. 3 is a side view of Fig. 2, and Fig. 4 is a conventional rope end coupling member support mechanism. FIG. 5 is a diagram showing the arrangement of the end coupling member supporting mechanism with respect to the center of the winding drum. FIG. 5 is a diagram showing an embodiment of this invention. In the figure, 1 is a frame, 2 is a support member, 3 is a suspension member, 4 is a support shaft, 5 is a rope end coupling member,
6 is the wire rope, A is the diameter of the winding drum, B is the predetermined gap, C is the inner circumference of the coupling member, L is the vertical distance between the rotation center of the winding drum and the axis of the support shaft, and D is the frame. is the width dimension of Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) A frame made of a steel plate that substantially surrounds the outer circumferential surface of the winding drum with a predetermined gap therebetween, which is connected to the lower part of the frame and has a substantially L-shaped cross section; a support member disposed such that one side is substantially welded to the inner circumferential surface of the frame body facing the outer circumferential surface of the body of the winding drum with a predetermined gap therebetween; a suspension member coupled to the support member; An electric hoist comprising a member, a support shaft coupled to the suspension member, and a rope end coupling member swingably supported on the support shaft. (2) The electric hoist according to claim 1, wherein the supporting member is made of equilateral angle steel or scalene angle steel. (3) The electric hoist according to claim 1, wherein the hanging members are a pair of hanging members connected to a support member at a predetermined distance. (4) The electric hoist according to claim 1 of the utility model registration, characterized in that there is only one hanging member.