JPS6218625Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a lever-type small-sized hoisting and traction device that performs hoisting or towing and transportation by repeatedly swinging a lever.

Conventionally, as a lever support device for a lever-type small hoisting and traction device, a boss is fitted into an opening provided on the side of a metal plate brake cover and fixed by welding. A structure is known in which a cylindrical shaft portion cut and formed is rotatably fitted into the boss, and a retaining snap ring is fitted into a groove on the outer periphery of the tip of the cylindrical shaft portion.

However, the conventional lever support device has the disadvantage that it has a complicated structure, requires welding and cutting, and is expensive.

The object of this invention is to provide a lever-type compact hoisting and traction device which eliminates the above-mentioned drawbacks.

Next, this invention will be explained in detail using illustrated examples.

1 to 4 show a first embodiment of this invention, in which an intermediate portion of a drive shaft 5 is supported by a frame 6 via a bearing 7, and one end portion of the drive shaft 5 is supported by a frame 6 via a bearing 7. Bearing 9 by gearbox 8
A switching gear 11 is attached to a male brake thread 10 supported through the brake shaft and provided at the other end of the drive shaft 5.
The driven member 13, which is fitted onto the drive shaft 5 between the frame 6 and the drive member 12 in a non-rotatable manner, is supported by the bearing 7 on the drive shaft 5. It is engaged with the large diameter part.

Between the driving member 12 and the driven member 13,
A braking pawl 14 and a friction plate 15 in contact with both sides thereof are interposed, and a braking pawl 16 pivotally connected to the frame 6 is engaged with the braking pawl 14 by an engagement spring 17. A bearing 18 made of oil-impregnated sintered alloy is fitted into the hole of the braking ratchet 14, and the ratchet 14, friction plate 15, and bearing 18 are further fitted into the small diameter portion of the driven member 13 to form a brake section. has been done. Further, between the driving member 12 and the driven member 13, there is an elastic resistance member 19 made of a coil spring that acts to resist movement in the tightening direction when the driving member 12 is about to move in the tightening direction of the brake section. It is mediated.

The driven member 13, the braking ratchet 14, and the friction plate 1
5. A U-shaped cross section disposed on one side of the metal plate brake cover 1 that covers the braking claw piece 16 and one side of the drive member 12 so as to face the outer peripheral surface of the intermediate portion of the drive member 12. A fixed support ring 2 is bent and formed by press working, and a portion facing the brake cover 1 at the proximal end of the inner lever component 3A made of a metal plate has a ring rotatable toward the inner circumference of the fixed support ring 2. A rotary support ring 4 fitted so as not to move in the longitudinal direction of the drive shaft 5 is bent and formed by press working so as to wrap around the fixed support ring 2,
Further, a cylindrical spacer 20 having a female thread is fitted into the base end of the inner lever component 3A and fixed by caulking, and the metal plate outer lever component 3B and the inner lever component 3A are connected to each other.
is connected to the inner lever component 3 by a connecting bolt 21 screwed into the spacer 20.
A and the outer lever component 3B constitute an operating lever 3.

The other side of the brake cover 1 is fixed to the frame 6 with bolts (not shown),
and a pawl piece 45 for rotation in the hoisting direction and a pawl piece 4 for rotation in the hoisting direction, which are removably engaged with the switching gear 11.
6. The switching pawl fitting 22, which has an engaging part 47 for holding a position in the winding direction, an engaging part 48 for holding a position in the lowering direction, and an engaging part 49 for holding a neutral position, is rotatably attached to the operating lever 3. The handle 23 is fitted onto and fixed to a pivot shaft 24 which has a handle 23 attached thereto.

A groove-shaped support fitting 50 is disposed within the inner lever component 3A and fixed by spot welding 51, and an engagement spring 26 is disposed within the support fitting 50.
The holding member 25 is detachably engaged with the winding direction position holding engaging part 47, the winding down direction position holding engaging part 48, and the neutral position holding engaging part 49.
is provided so that it can move forward and backward toward the switching claw metal fitting 22.

One end of a driven shaft 27 disposed below and parallel to the drive shaft 5 is supported by a gear box 8 via a bearing 28, and the driven shaft 27
The other end is supported by the frame 6 via a bearing 29, and a cover plate 3 is provided at the opening of the gearbox 8.
Further, a load sheave 32 for winding a load chain 31 between the frame 6 and the cover plate 30 is integrally provided on the driven shaft 27, and a large-diameter driven gear 33 is fitted in the gear box 8. A fixed pinion 34 provided at one end of the drive shaft 5 is meshed with a large-diameter driven gear 33 .

A small diameter shaft portion 3 connected to the other end of the drive shaft 5
5, the manual speed rotation handle 36 is fitted, and the handle fixing nut 37 is screwed into the nut 3.
7 is fixed to the small diameter shaft portion 35 by a split pin or other locking means, and an engagement groove 38 provided at the outer end of the drive member 12 has an engagement groove provided at the inner end of the handle 36. A protrusion 39 is fitted.

When there is no load, the brake part is relaxed by the elastic resistance member 19, so the switching pawl fitting 2
2 to the neutral position to remove both the forward rotation pawl piece and the reverse rotation pawl piece from the switching gear 11, and then grip and rotate the handle 36 to rotate the drive shaft 5 and the drive member 12. By rotating the load sheave 32, the position of the load chain 31 can be quickly adjusted.

FIG. 5 shows a second embodiment of this invention, in which a rotary support ring 4 having a U-shaped cross section is bent on an inner lever component 3A made of a metal plate in an operating lever 3. , metal plate brake cover 1
A fixed support ring 2 bent at one side and having a U-shaped cross section is fitted so as to be rotatable and not move in the longitudinal direction of the drive shaft 5, but the other configuration is the same as that of the first embodiment. Same as in the example.

FIG. 6 shows a third embodiment of this invention, showing the cross-sectional shape of the fixed support ring 2 of the brake cover 1 and the rotary support ring 4 of the inner lever component 3A.
The cross-sectional shape of each is approximately semicircular, but the other configurations are the same as in the first embodiment.

FIG. 7 shows a fourth embodiment of this invention, in which a rotating support ring 4 having a substantially semicircular cross section is bent on the inner lever component 3A, and the rotating support ring 4 is formed on the brake cover 1. The fixed support ring 2 is bent and formed so as to wrap around it.

In FIG. 1, reference numeral 42 denotes an upper hook that is disposed between the frame 6 and the gearbox 8 and is attached to the upper hook support fitting 44 by a support rod 43.

According to this invention, a fixed support ring 2 bent at the side of a metal plate brake cover 1 in a lever-type small hoisting and traction device is provided with a fixed support ring 2 bent at the side of the base end of a metal plate operation lever 3. Since the formed rotation support ring 4 is fitted so as to be rotatable and not to move in the longitudinal direction of the drive shaft 5, the boss can be attached to the brake cover by welding, or the cylindrical shaft can be attached to the operating lever. The brake cover 1 is made of a metal plate without any complicated processing such as cutting or forming a groove for fitting a snap spring on the cylindrical shaft.
By using a part of the operating lever 3 made of a metal plate as a support part, the operating lever 3 can be easily installed.
The effect of being able to support the brake cover 1 rotatably with respect to the brake cover 1 so as not to move in the longitudinal direction of the drive shaft 5 is obtained.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional side view showing a part of a small lever-type hoisting and traction device having a lever support device according to a first embodiment of the invention, and FIG. 2 is a view of the vicinity of the brake part and lever support device in FIG. 1. FIG. 3 is a vertical sectional side view showing an enlarged view of the drive unit using the operating lever in FIG. 1, and FIG.
The sectional view taken along the line A--A in the figure and FIGS. 5 to 7 are longitudinal sectional side views showing the lever support device and the vicinity of the brake section according to the second to fourth embodiments of the invention. In the figure, 1 is a metal plate brake cover, 2
3 is a fixed support ring, 3 is a metal plate operating lever, 3A is a metal plate inner lever component, 3B is a metal plate outer lever component, 4 is a rotating support ring, 5 is a drive shaft, 6 is a frame, 8 1 is a gearbox, 10 is a male brake screw, 11 is a switching gear, 12 is a driving member, 13 is a driven member, 14 is a braking ratchet, 15 is a friction plate, 16 is a braking pawl, 19 is an elastic resistance member, 20 is a spacer, 21 is a coupling bolt, 22
31 is a load chain, 32 is a load sheave, and 36 is a manual speed rotation handle.

Claims (1)

[Scope of utility model registration request] A fixed support ring 2 is bent and formed on the side of a metal plate brake cover 1 in a lever-type small hoisting and traction device, and a rotation support ring 4 is bent and formed on the side of the base end of a metal plate operation lever 3. and the fixed support ring 2
A small lever-type hoisting and traction device characterized in that a rotary support ring 4 is fitted into the drive shaft 5 so as to be rotatable and not to move in the longitudinal direction of the drive shaft 5.