JP2546921Y2 - Lever type hoisting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a lever type hoisting machine which performs a hoisting or lowering operation by repeatedly rotating an operation lever, and more particularly, particularly to a horizontal hoisting machine. The present invention relates to a lever-type hoist having an operation lever support structure capable of smoothly performing an idling operation.

(Prior Art) As shown in FIG. 6, a general support structure of an operation lever in a conventional lever-type hoisting machine has a cover portion b of an operation lever a provided with an inner cylindrical portion c, The portion c is rotatably supported by the tubular portion f of the brake cover e attached to the side plate d of the hoisting machine body. The cylindrical portions c and f are formed to extend in parallel with the axis of the drive shaft g. h is a driven wheel, i is a friction plate, j is a brake release spring, k is a drive wheel, and l is a manually operated wheel.

(Problems to be Solved by the Invention) However, such a support structure cannot provide a stable support state, and improvement thereof has been demanded.

That is, the support surface of the operation lever is a cylindrical surface parallel to the axis of the drive shaft g, and can bear only a load in the radial direction. In addition, in order to ensure smooth rotation between the support surfaces, the diameter of the both surfaces is increased. There is a dimensional difference in the dimensions, and a slight gap is provided between the two. For this reason, the operation lever a easily swings not only in its original rotation direction (the rotation direction of the drive shaft g) but also in the axial direction of the drive shaft g, and a stable support state cannot be obtained.

Therefore, during operation of the hoisting machine, the inner cylindrical portion c of the operation lever a contacts the drive wheel k, or the outer cylindrical portion m opposite to the cylindrical portion c is A situation occurs in which the drive wheel k and the manually operated wheel 1 come into contact with each other, and a smooth operation of the hoist cannot be obtained. Such inconvenience
This is particularly noticeable during the idling operation in the horizontal state.

In this regard, the inner cylindrical portion c of the operating lever a
And the cylindrical portion f of the brake cover e is formed to be bent in an arc shape as shown in FIG.
Further, a support structure which is fitted so as not to move in the direction parallel to the axis of the drive shaft g has also been proposed (for example, Japanese Patent Publication Nos. 59-163298, 58-99289 and 62-62). -18625).

However, when the cylindrical portions c and f are bent in an arc shape as described above, in order to secure the assembling accuracy of the operation lever a to the brake cover e, high-precision machining is required for machining these fitting portions. Is required. For this reason, the number of steps for the support structure is increased, and it takes time and effort to assemble, and the workability is poor and the production cost is relatively high.

The present invention has been made in view of such a conventional problem, and a stable supporting state of the operation lever is obtained.
Provided is a lever-type hoisting machine having an operation lever supporting structure in which the rotation of each drive unit is smoothly performed, and particularly, the idle operation can be smoothly performed when the device is used in a horizontal state. The purpose is to do.

(Means for Solving the Problems) According to the present invention, a cylindrical brake cover cylindrical portion is formed at an outer end of a brake cover attached to a side plate of a hoisting machine body, and a shaft of a cover portion of an operation lever is provided. A cylindrical inner cylindrical portion is formed at a direction inner end portion, and an axial outer end edge of the brake cover cylindrical portion is formed to be bent in an inner diameter direction to form a radially inward flange, and the inner cylindrical portion is formed. The axial inner edge of the brake cover is bent outward in the radial direction to form a radially outward flange, and between the inner peripheral surface of the brake cover tubular portion and the outer peripheral surface of the inner tubular portion, An annular member made of a synthetic resin having a long rectangular cross section is slidably interposed. Is engaged with the radially inward flange. A lever-type hoisting machine, wherein an inner end of the annular member in the axial direction is engaged with the radially outward flange.

(Operation) The outer end in the axial direction of the cylindrical portion of the brake cover is bent in the inner diameter direction to form a radially inward flange, and the inner end in the axial direction of the inner cylindrical portion is formed in the outer radial direction. The annular member is bent radially outward so that the axially outer end of the annular member is engaged with the radially inward flange, and the axially inner end of the annular member is engaged with the radially outward flange. Further, since the radially inward flange is positioned so as to slide on the cover portion of the operation lever, the operation lever is axially positioned, and
An annular member is interposed between the cylindrical brake cover cylindrical portion and the cylindrical inner cylindrical portion, and the cross section of the annular member has a rectangular cross section that is long in the axial direction. Since it is formed, both the contact between the brake cover tubular portion and the annular member and the contact between the inner tubular portion and the annular member are in contact with the cylindrical surface, so the inclination of the operation lever with respect to the axis is restricted. Thus, the idle operation can be performed lightly.

Furthermore, after extrapolating the brake cover tubular portion around the outer periphery of the inner tubular portion of the operation lever, an annular member is fitted between the inner tubular portion and the brake cover tubular portion, and the inner end of the inner tubular portion is removed. Since it is only necessary to bend in the outer diameter direction, manufacture is easy.

Furthermore, since it is an annular member made of synthetic resin, it can be manufactured lightweight.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIGS. 1 to 3 show a lever-type hoist according to the present invention. The hoist has a general structure which is well-known in the art, and includes a pair of side plates 1a and 1b. 1, a load sheave 2 rotatably supported by the hoisting machine main body 1, a drive shaft 4 rotatably supported by the load sheave 2, and connected via a reduction gear mechanism 3. An operation lever 6 connected to the drive shaft 4 via a drive transmission mechanism 5 is provided as a main part. 7 is an upper hook for suspending the hoisting machine main body 1, 8 is a load chain, and 9 is the load chain 8.
Is a lower hook for hanging a luggage provided at a lower end of the lower case.

The drive wheel 10 of the drive transmission mechanism 5 is screwed to the screw portion 4a of the drive shaft 4 so as to be able to advance and retreat in the axial direction, and is always axially outward (in the right direction in the drawing) by a coil spring 11. ). The transmission gear 10a of the drive wheel 10 has a rotation direction switching claw 12
The rotation direction switching claw 12 can be engaged with the transmission gear 10a by operating a switching lever 13 provided outside the operation lever 6 (a winding engagement position, (Unwinding engagement position and non-engagement position) are selectively switched.

On the outer side of the drive wheel 10 in the axial direction, a manual operation wheel 14 is rotatably supported on the outer peripheral surface of the adjusting member 15 adjacent to the drive wheel 10. With 14, the drive wheel 10 is quickly turned and operated. Also, the adjusting member
Reference numeral 15 is spline-fitted to the spline portion 4b of the drive shaft 4. By the adjusting member 15, the engagement protrusion 14 of the manual operation wheel 14 is provided.
The rotation angle of the engagement between the a and the engagement groove 10b of the drive wheel 10 is adjusted, and the rotation of the drive shaft 4 is transmitted to the manually operated wheel 14.

Further, a steel plate brake cover 16 is attached to the side plate 1b of the hoisting machine main body 1, and thereby the brake portion of the drive transmission mechanism 5 is covered. At one end of the brake cover 16, a mounting flange 16a is provided, and a plurality of stay bolts 17 are fixed to the side plate 1b.
And is fixedly attached to it by a fastening nut 18. On the other end side of the brake cover 16, a brake cover tubular portion 20 is formed extending outward in the axial direction. The cylinder part of the brake cover
Reference numeral 20 denotes a cylindrical member, which constitutes a support structure for the operation lever 6.

That is, as shown in FIG. 4, the support structure of the operation lever 6 includes the above-described brake cover tubular portion 20, an inner tubular portion 21 of the operation lever 6 which is supported by the brake cover tubular portion 20, and both of these tubular portions 2
And an annular member 23 slidably interposed between 0 and 21.

The inner peripheral surface 20a of the brake cover tubular portion 20 is a cylindrical inner peripheral surface that is coaxial with the axis of the drive shaft 4 and extends in an axially outward direction with respect to the axis.

The operating lever 6 includes a lever body 24 and a lever cover 25 made of a steel plate.
24 are integrally connected to the upper cover portion 24a by a plurality of bolts and nuts 26 to cover the entire outer peripheral portion of the drive wheel 10.

The inner cylindrical portion 21 is provided on the inner side in the axial direction of the lever cover 25, and the inner cylindrical portion 21 is formed in a cylindrical shape, and its outer peripheral surface 21a is aligned with the axis of the drive shaft 4. It is a cylindrical outer peripheral surface extending at the same center and parallel inward in the axial direction with respect to the axis.

The annular member 23 is made of a synthetic resin having a cylindrical shape,
It has an axial length corresponding to the axial dimension of the brake cover tubular portion 20 and the inner tubular portion 21, and the inner and outer peripheral surfaces thereof are
The outer circumferential surface 20a of the brake cover tubular portion 20 and the outer circumferential surface 21a of the inner tubular portion 21 are slidably contacted with each other to ensure a smooth relative rotation between the two.

Further, radial flanges 29 and 30 are formed on the brake cover tubular portion 20 and the inner tubular portion 21 so as to be engaged with both axial end portions 27 and 28 of the annular member 23, respectively. That is, the radially inward flange 29 is formed at the axially outer edge of the brake cover tubular portion 20 so as to be bent perpendicularly to the inner diameter side with respect to the axis of the drive shaft 4. The radially outward flange 30 is formed on the inner end of the inner cylindrical portion 21 in the axial direction so as to be bent perpendicularly to the outer diameter side with respect to the axis of the drive shaft 4. The inner surfaces of the two radial flanges 29 and 30 are slidably engaged with the two axial ends 27 and 28 of the annular member 23, respectively. Relative movement is regulated.

The annular member 23 is a self-lubricating lubricating member impregnated with a lubricant, or a peripheral portion thereof is filled with lubricating grease. In the latter case, the two radial flanges 29 and 30 also function as an oil seal for the lubricating grease, and the grease leaks or scatters in the hoisting machine cover, especially in the brake cover 16, It prevents adhesion to the friction plates 31, 31 of the brake portion of the drive transmission mechanism 5.

The procedure for assembling the operation lever 6 support structure is as follows (see FIG. 5).

First, the brake cover cylindrical portion 20 of the brake cover 16
Then, a radial inward flange 29 is formed.

Next, the annular member 23 is inserted from the inside in the axial direction into the inner diameter side of the tubular portion 20 of the brake cover, and the outer end 27 in the axial direction is brought into contact with the radially inward flange 29.

Further, the operating lever 6 is provided on the inner diameter side of the annular member 23.
Of the lever cover 25 is brought into contact with the radially inward flange 29.

Then, while supporting the upper cover portion 24a with the lower die 35, the upper die 36 is pressed to bend the axially inner edge portion 30 'of the inner cylindrical portion 21 radially outward, whereby The radially outward flange 30 is formed to complete the support structure in which the annular member 23 is installed (see FIG. 4).

Thus, in the lever-type hoist constructed as described above, the radial load and the axial load of the operation lever 6 are surely applied to the brake cover 16 via the annular member 23. The operation lever 6 can be smoothly operated in its original rotation direction (rotation direction of the drive shaft), and can be prevented from being moved in the axial direction, and can be prevented from swinging or tilting. Will be done.

(Effects of the Invention) In the present invention, the opposite surface of the cylindrical inner cylindrical portion like the cylindrical brake cover cylindrical portion is formed into a cylindrical surface parallel to the axis, and a short cylinder is provided between the cylindrical surfaces. A body-shaped annular member is interposed, and the inner and outer surfaces of the annular member are slidably contacted with the inner surface of the brake cover tubular portion and the outer surface of the inner tubular portion, whereby radial deflection of the operating lever is achieved. Is reliably prevented.

In addition, a radially inward flange in which the axial outer end of the brake cover cylindrical portion is bent in the radial direction, and a radially inward flange in which the axial inner end of the inner cylindrical portion is bent outwardly. Since the axially inner and outer ends of the annular member are supported between the flange and the outwardly directed flange, the axial movement of the operating lever is also reliably prevented.

Moreover, since the annular member has an inner peripheral surface and an outer peripheral surface formed into a cylindrical surface and a cross-section formed into a rectangular cross-section that is long in the axial direction, the deflection of the operating lever against an axial load applied to the operation lever is reduced. The idle rotation operation is no longer heavy due to the axial swing of the operation lever.

Furthermore, a radially inward flange is formed in advance on the axially outer end edge of the brake cover tubular portion, and after inserting the annular member from the inside in the axial direction to the inner peripheral surface of the brake cover tubular portion, The inner cylindrical portion of the operation lever is inserted into the inner peripheral surface of the annular member from the outside in the axial direction, and the inner edge of the inner cylindrical portion in the axial direction is bent radially outward to form a radially outward flange. The annular member is formed so that the axially outer end thereof is engaged with the radially inward flange, and the axially inner end of the annular member is engaged with the radially outward flange. Easy to install.

Moreover, the gap between the annular member, the brake cover tubular portion and the inner tubular portion can be made sufficiently small, and the axially outer end of the annular member is brought into contact with the radially inward flange. Since the radially outward flange is bent, the gap between the inward and outward ends of the annular member and the inward and outward flange can be sufficiently reduced, and the axial deflection of the operation lever can be sufficiently reduced.

Furthermore, the annular member has a short cylindrical shape, and the annular member having the short cylindrical shape is inserted between the brake cover tubular portion and the inner tubular portion, and the inner end of the inner tubular portion is bent by a die or the like. Since it can be manufactured only by itself, there are few manufacturing processes,
It can be performed easily and reliably.

[Brief description of the drawings]

1 to 5 show an embodiment according to the present invention, FIG. 1 is a longitudinal sectional view showing a lever type hoisting machine, FIG. 2 is a front view of the lever type hoisting machine, FIG. Is an enlarged vertical sectional view of the lever type hoisting machine, FIG. 4 is an enlarged vertical sectional view of the operating lever supporting structure of the lever type hoisting machine, and FIG. 5 is a view for explaining an assembling procedure of the operating lever supporting structure. 6 and FIG. 7 are longitudinal sectional views each showing an operation lever supporting structure of a conventional lever type hoisting machine. 1 ... Hoisting machine body, 1a, 1b ... Side plate, 4 ... Drive shaft, 6
…… Operation lever, 16 brake cover, 20 …… Brake cover tubular part, 20a …… Inner peripheral surface of the brake cover tubular part, 2
1 ... inner cylindrical part, 21a ... outer peripheral surface of the inner cylindrical part, 23 ...
Annular member, 27, 28… axial end of annular member, 29… radial inward flange, 30… radial outward flange

Claims (1)

(57) [Scope of request for utility model registration] A cylindrical brake cover tubular portion is formed at an outer end of a brake cover attached to a side plate of a hoisting machine main body, and a cylindrical brake cover is formed at an axial inner end portion of a cover portion of an operation lever. An inner cylindrical portion is formed, an axially outer end portion of the brake cover cylindrical portion is bent and formed in an inner diameter direction to form a radially inward flange, and an axially inner end portion of the inner cylindrical portion is formed. The outer circumferential surface of the brake cover tubular portion and the outer circumferential surface of the inner tubular portion are formed in parallel cylindrical surfaces, and are bent in the outer radial direction to form a radially outward flange. An annular member having a rectangular cross section that is long in the axial direction and an inner and outer peripheral surface formed on a cylindrical surface parallel to the axis is formed between the outer peripheral surface and the outer peripheral surface so as to be slidable in the circumferential direction. The radial inward flange slides into contact with the cover of the operation lever. Lever-type hoist characterized by comprising is positioned.