JPH0673074U - Lever support device for lever-type tow hoist - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] In a lever-type towing hoist that smoothly rotates the metal that pivotally supports the lever component with respect to the brake cover to ensure a constant and smooth lever operation. A lever support device is provided. A metal 6 has an outer peripheral surface portion that rotatably supports the opening portion of the brake cover 4 and an outer peripheral surface portion that non-rotatably supports the lever component member 3, and has a stepped portion in the axial direction of the metal 6. Are arranged in parallel with each other, and the outer end portion of the metal 6 extending beyond the lever constituent member 3 is press-crimped so as to be non-rotatably integrated with the lever constituent member 3.
A play gap is formed between the lever component member 3 and the brake cover 4 to allow rotation and movement in the axial direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lever supporting device for a lever type towing and hoisting machine.

[0002]

[Prior art]

 FIG. 6 shows, as a comparative example, a device conventionally devised by the present inventor in relation to a lever supporting device in a conventional lever type towing and hoisting machine.

In this comparative example, a metal 8 is fitted in the openings of the brake cover 4 and the lever component 3 fixed to the side plate 5, and the metal 8 is prevented from moving in the axial direction. It is fixed by a stop ring 9. The metal 8 and the brake cover 4 are connected in a rotatable structure, and the metal 8 and the lever component 3 are connected in a non-rotatable structure.

[0004]

[Problems to be solved by the device]

 In the case of the lever support device shown in the comparative example, the metal 8 and the lever component 3 are fixed, and the metal 8 and the lever component 3 are fixed unless the machining dimensional accuracy is extremely high for all of the metal 8, the brake cover 4, and the lever component 3. It is difficult for the brake cover 4 to realize the above-described structure of turning, and the lever 2 must be fixed unless the accuracy of the groove position of the metal 8 that stops the stop ring 9 that blocks the axial movement of the metal 8 is good. It has the drawback of not working properly.

[0005]

[Means for Solving the Problems]

 The present invention provides a lever supporting device for a lever type towing and hoisting machine that solves the above-mentioned problems, and is configured as a means thereof, in which a metal 6 is attached to a brake cover 4 fixed to a side plate 5. In the lever-type tow hoisting machine in which the lever component member 3 is rotatably coupled through the metal member 6, the metal 6 is provided with an outer peripheral surface portion that rotatably supports the opening portion of the brake cover 4 and the lever component member 3. An outer peripheral surface portion that is non-rotatably supported is arranged in parallel in the axial direction of the metal 6 via a step portion 7, and the metal 6 is provided with an outer end portion 10 that extends beyond the lever component member 3. , The outer end portion 10 is press-crimped to unify the metal 6 and the lever component member 3 so that they cannot rotate, and further, between the lever component member 3 and the brake cover 4, they rotate and axially move. Move Lies in comprising constituting containers allowed to clearance theta.

[0006]

【Example】

 An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, the pinion shaft 1 is integrally provided with a pinion 12 at one end. The load sheave 13 is rotatably fitted on the pinion shaft 1, and both ends of the load sheave 13 are pivotally supported by the side plates 5 and 5 via the metals 14 and 14, respectively. The gear 15 is fixed to the load sheave 13 and is always interlocked with the pinion 12 via a reduction gear group 16. The gear case 17 entirely surrounds the reduction gear group 16 and the like, and is fixed to one side plate 5. The brake cover 4 entirely surrounds the brake portion 18 and is fixed to the other side plate 5.

The upper hook 19 is attached to the side plates 5 and 5 so as to be rotatable and swingable. The load chain 20 is suspended on the load sheave 13, and a lower hook (not shown) is attached to the lower end thereof to load it. The hub 21 is non-rotatably fitted to the pinion shaft 1 via a serration 22. An operating member 24 is screwed into the brake screw 23 of the pinion shaft 1, and a quick-turning grip 25 is rotatable near the outer end of the pinion shaft 1 at the side of the operating member 24. It is fitted so that it can move axially. Further, a locking member 26 is externally fitted to the outer end portion of the pinion shaft 1 located on the side of the quick-turning grip 25, and the locking member 26 is fitted between the pinion shaft 1 and the pinion shaft 1. An elastic resistance member 27 made of a mainspring is interposed.

A screw rod 28 is connected to the end of the outer end of the pinion shaft 1, and a nut 29 screwed to the screw rod 28 serves to prevent the locking member 26 from coming off.

A spring 30 is interposed in a compressed state between the operating member 24 and the quick-turn grip 25, and the spring 30 constantly presses the quick-turn grip 25 against the locking member 26.

The hub 21 non-rotatably fitted onto the pinion shaft 1 has a ratchet wheel 32 and a pair of brake linings 33 externally fitted to a small cylindrical portion 31 of the hub. The brake unit 18 is configured. The braking pawls 34, 34 are pivotally supported by a pawl pin 35 fixed to the side plate 5, and the engaging spring 36 engages the pawl 34 with the ratchet wheel 32.

A gap δ is formed between the actuating member 24 and the quick-turn grip 25 while the brake is operating.

As shown in FIG. 2, in the lever operation portion, a metal 6 is rotatably fitted to the brake cover 4 in an opening portion of the brake cover 4 fixed to the side plate 5, The lever component member 3 of the lever 2 is fitted into the stepped portion 7 of the lever 6, and is fixed by press crimping so that the lever component member 3 cannot rotate with respect to the metal 6. Therefore, the lever 2 is located on the outer periphery of the operating member 24, but has a structure in which the lever 2 is completely cut off from the operating member 24.

A switching gear portion 37 is provided on the outer periphery of the operating member 24, and a switching pawl metal fitting 38 is engaged with the switching gear portion 37. The switching claw fitting 38 is fixed to a shaft 40 of a handle 39 by a spring pin 41. The shaft 40 of the handle 39 is pivotally supported by the lever 2. The lever 2 is provided with a holding shaft 42 for selectively holding the switching claw fitting 38 at any one of the forward rotation position, the reverse rotation position, and the neutral position. It is pressed against.

The opening size of the brake cover 4 is set to be larger than the outer diameter of the metal 6, and when the lever component 3 is fitted to the metal 6, as shown in FIG. An axial play θ is formed between the component member 3 and the component member 3.

After the lever component member 3 is fitted into the stepped portion 7 of the metal 6, the outer end portion of the metal 6 is pressed by a pressing process as shown in FIGS. 3 (A) to 3 (B). Press caulking 10 toward the lever constituent member 3 to fix the metal 6 and the lever constituent member 3 in a non-rotatable manner. In order to surely prevent the rotation, as shown in FIG. 5, a plurality of notches 11 are provided on the inner circumference of the lever component member 3 and the outer end 10 of the metal 6 is bited by caulking work in the pressing process. By doing so, the metal 6 and the lever component member 3 can be completely prevented from rotating relative to each other.

Incidentally, in the comparative example shown in FIG. 6, if the lever type towing hoist is used, it is assumed that the lever 2 is directed upward or the pinion shaft 1 is oriented vertically. For example, all the weight of the lever 2 acts on the brake cover 4 and the lever operation becomes heavy, which hinders smooth operation. In addition, the brake cover 4 and the lever component member 3 are in frictional contact with each other. While there is a risk of rattling, the present invention never causes such a problem.

[0018]

[Effect of device]

 According to the present invention, since the play θ is provided, the brake cover 4 and the metal 6 are always smoothly rotated, and there is an effect that a constant and smooth operation of the lever 2 is always guaranteed.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a lever type towing and hoisting machine according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional side view showing details of a lever support device in the lever-type tow hoisting machine.

3A and 3B show a state in which a metal and a lever constituent member are press-crimped, where FIG. 3A is a vertical sectional view showing a state before a caulking step, and FIG. 3B is a vertical sectional view showing a state after a caulking step. .

FIG. 4 is a vertical sectional side view showing a metal used in one embodiment of the present invention.

5A and 5B show a lever component member used in one embodiment of the present invention, FIG. 5A is a front view of a main part, and FIG.

FIG. 6 is a vertical sectional side view showing a lever-type tow hoisting machine illustrated as a comparative example with respect to the present invention.

[Explanation of symbols]

 1 Pinion Shaft 2 Lever 3 Lever Component 4 Brake Cover 5 Side Plate 6 Metal 7 Metal Step 10 Metal Outer Edge 11 Lever Component Cutout 12 Pinion 13 Load Sheave

Claims (1)

[Scope of utility model registration request] 1. A lever-type towing hoist having a lever component member 3 rotatably coupled to a brake cover 4 fixed to a side plate 5 via a metal 6, wherein the metal 6 is a brake cover 4. An outer peripheral surface portion that rotatably supports the opening of the metal and an outer peripheral surface portion that non-rotatably supports the lever component member 3 are arranged side by side in the axial direction of the metal 6 via a step portion 7, and the metal 6 is provided with an outer end portion 10 that extends beyond the lever component member 3, and the outer end portion 10 is press-crimped to form the metal 6 and the lever component member 3.
Is integrated so as to be non-rotatable, and a gap θ is formed between the lever component member 3 and the brake cover 4 to allow rotation and axial movement. Lever support device for tow hoist.