JPS5842394Y2 - Towed hoist - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a traction hoist with a single lever or hand chain.

In conventional towing hoists, the structure of the hook pin that pivotally connects the upper end of the housing and the hook to prevent rotation is extremely complicated, requiring mechanical hole drilling, tapping, and bolt tightening work.

If the rotation prevention is insufficient, the hook pin may rotate and the hole may wear out significantly, since recent lightweight housings use aluminum alloy or the like.

The purpose of this invention is to solve these conventional problems and to provide a reliable rotation stopper to a hook pin with the simplest shape and structure without using a separate rotation stopper part. is a reduction gear mechanism, brake mechanism,
In a towing hoist, which has a housing in which a lid that surrounds a handwheel, etc. is fixed to the left and right sides of a central body in abutting manner, there is a horizontal blind hole shape into which a hook pin is inserted. A hole is bored from one side wall of the central body toward the other side wall, and one end surface of the pin is inserted into the blind hole from the side wall in the axial direction. , a detent notch having a stepped notch intersecting the axis is recessed in one end of the pin;
If the pin is inserted into the hole assuming that the dimension from the notch stepped portion to the other end 1 is equal to the effective depth dimension of the hole, the notch stepped portion will be flush with the side wall. A part of the abutting peripheral edge of the lid is fitted into the notch, and the lid is abutted and fixed to one side wall of the central body and the stepped notch, The hook pin can be removed because it is configured as a stop and rotation stop.

Hereinafter, the present invention will be explained in detail based on the illustrated embodiments.

In Figures 1 and 2, the swinging of lever 1 causes a load of 2.
3 is a hook which is attached to a mounting bracket 5 so that the retaining part 4 at the lower part thereof can be rotated, and in the figure, it can be rotated around a vertical axis. do.

Reference numeral 6 denotes a housing made of a light alloy or the like, and the housing 6 consists of a central body 7 and lids 8, 8. Bolts 9 are attached to the left and right sides of the central body 7 with the lids 8, 8 in contact. ...
It is fixed with a fixing device such as.

The central body γ contains a load wheel for hoisting the load 2, a reduction gear mechanism, etc., and the lid 8 on the right side in FIG. 1 is fixed to surround the brake mechanism, and the lid 8 on the left side in the figure 8
is fixed so as to surround the reduction gear mechanism from the outside.

A recess 10 into which the mounting bracket 5 is fitted is provided in the upper part of the central body 7, and a horizontal hole 11 is bored through the recess 10. Reference numeral 11 is a blind hole that is bored from the right side wall to the left side wall of the central body 7 and does not penetrate into the left side wall.

12 is a hook pin, which is connected to the hole 13 of the mounting bracket 5.
and the hole 11 of the central body 7 in the form of a skewer and are inserted from the right side wall in the axial direction, thereby attaching the mounting bracket 5 to the central body 7.

Specifically, as shown in FIG. 3I, a semicircular notch 14 is provided at one end of the hook pin 12, and the notched portion 1
If the dimension A from 5 to the other end is equal to the effective depth dimension of the hole 11, and the pin 12 is inserted from the right side wall of the central body 7 as shown in FIG. A part of the contact peripheral edge 16 of the lid body 8 surrounding the brake mechanism is fitted into the notch 14, and the bolts 9, etc. are set so as to be flush with the right side wall. Lid body 8
If the hook pin 12 is brought into contact with and fixed to the central body 7 and the notched stepped portion 15, since the left side of the notched portion 11 is blind, it will not come off in either the left or right direction, and the hook pin 12 will be attached to the contact periphery of the lid body 8. A part of the portion 16 serves as a pull-out and rotation stop, and is reliably held in a predetermined position.

Next, the shape of the notch 14 can be made into a shape intermediate between that of a full moon and a half moon, as shown in FIG.

Alternatively, as shown in FIG. 3, the remaining portion may be cut out to form a fan-shaped cutout 14.

FIG. 4 shows a chain block as another specific example of the traction hoist, in which a manual chain (not shown) is hung from a hand chain wheel 17 and rotated.

The housing 6 includes a central body 7 having two plate members 18.
and a lid body 8 surrounding the hand chain wheel 17 and the brake mechanism 19.
and a lid 8 that surrounds the reduction gear mechanism 20, and a part of the abutting peripheral edge 16 of the left lid 8 is connected to the hook pin 1.
The lid body 8 is fitted into the notch portion 14 of the hook pin 12 and fixedly attached to the central body 7, thereby preventing the hook pin 12 from being removed and rotating.

Note that 21 is a bolt/nut connection for fixing the lid 8 to the central body 7.

Further, in FIG. 4, the abutting peripheral edge 16 of the right lid 8 is exemplified to simply abut against the other end surface of the pin 12 and serve only as a stopper.

Therefore, also in this case, the hole 11 forms a blind hole with one end closed by the corresponding circumferential edge 16.

As described in detail above, the present invention has a horizontal blind hole-like hole 11 into which the hook pin 12 is inserted, which is bored from one side wall of the central body 7 to the other side wall. One end surface of the pin 12 that is inserted into the hole 11 from the side wall in the axial direction is cut out, and the one end of the pin 12 has a notched stepped part 15 that intersects with the axis. Since the stopper notch 14 is recessed, the pin 12 can be easily manufactured by simply cutting a rod-shaped body to a predetermined size and processing the end face in a predetermined manner.

Therefore, the pin 12 can be processed very easily and at low cost.

Furthermore, assuming that the dimension A from the notch stepped portion 15 to the other end of the pin 12 is equivalent to the effective depth dimension of the blind hole-like hole 11, if the pin 12 is inserted into the hole 11, The notch stepped portion 15 is set to be on the same plane as the above-mentioned side wall, and a part of the abutment peripheral edge 16 of the lid body 8 is fitted into the notch portion 14, so that the lid body 8 is attached to the central body 1. and the stepped notched portion 15
Since the pin 12 is configured to prevent the pin 12 from being removed and to prevent rotation, the pin 12 can be removed without adding any other parts such as an outer flange or a flange ring to prevent the pin 12 from rotating. Moreover, the length of the pin 12 can be set to the minimum necessary length.

In addition, since the rotation stopper bolts and the like do not protrude outward from the housing 6, safety is excellent and handling is easy.

In particular, since the lid body 8 prevents removal and rotation,
Accidents such as pin 12 falling out or spinning could be most definitely prevented.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing one embodiment of the present invention;
3 is a perspective view for explaining the shape of the notch of the hook pin, and FIG. 4 is a sectional front view showing another embodiment. 6...Housing, 7...Central body,
8... Lid body, 12... Hook pin,
14...Notch portion, 16...Abutting peripheral portion, 17...Hand chain wheel, -key mechanism, 20...
・Reduction gear mechanism. 9...Break

Claims (1)

[Scope of utility model registration request] In a towing hoist having a housing 6 in which a lid body 8 surrounding a reduction gear mechanism 20, a brake mechanism 19, a hand chain wheel 17, etc. is fixed in contact with the left and right sides of a central body T, a hook is attached. Horizontal blind hole 1 into which the pin 12 is inserted
1 from one side wall of the central body 7 toward the other side wall,
One end surface of the pin 12 which is inserted into the blind hole 11 from the side wall in the axial direction thereof is cut out, and the pin 12
A detent notch 14 having a notched stepped portion 15 intersecting the axis is recessed in one end, and the dimension A from the notched stepped portion 15 to the other end 1 is determined by the diameter of the hole 11. When the pin 12 is inserted into the hole 11 with the same effective depth dimension, the notched stepped portion 15 is set to be flush with the above-mentioned side wall. A portion of the lid body 8 is fitted into the notch portion 14, and the lid body 8 is fixed in contact with one side wall of the central body 7 and the stepped notch portion 15 to prevent the hook pin 12 from being removed and rotated. A towing hoist characterized in that it is configured as a stop.