JP4832409B2 - Hoisting tractor - Google Patents

Description

  The present invention relates to a hoisting traction machine, and more particularly to a hoisting traction machine provided with a fixing means for a main body frame using a spacer and a spring regulating means for urging a reverse rotation preventing claw provided on the spacer. It is.

Conventionally, as a hoisting and pulling machine having a simple structure and easy handling, the one shown in FIG. 6 is known. (For example, Patent Document 1)
Hereinafter, the conventional hoisting machine shown in FIG. 6 will be described. In FIG. 6, the drive member 21 is screwed to the drive shaft 20 so as to be able to advance and retreat, and the drive member 21 is rotated by repeatedly swinging the handle 31, via the brake plate 27 and the brake receiver 28. The drive shaft 20 is rotated, the load sheave 29 is rotated in conjunction with the rotation of the drive shaft 20, and the chain 30 is wound up. In this type of hoisting tractor, the load sheave 29 is installed between a pair of frames 24 positioned at a constant interval by the stepped portion of the bolt 25, and the small diameter portions at both ends of the bolt 25 are attached to the frame 24. It is inserted into the provided hole, and the outer periphery of the small diameter portion at both ends is threaded and fastened by a nut 26. The brake plate 27 and the brake receiver 28 are covered with a brake cover 23, and are covered with a sheave and gear on the load sheave 29 side, and a gear case 22.

Also, as a means for attaching the reverse rotation prevention claw to the bolt for fixing the frame, a large diameter portion and a small diameter portion are provided at the bolt end portion, and a spring for energizing the reverse rotation prevention claw is attached to the large diameter portion. It is known that an anti-reverse claw is pivotally attached to the part and is prevented from coming off with a ring or the like. (For example, Patent Document 2)
JP 2000-159487 A (pages 3 to 5, FIG. 1) Japanese Utility Model Publication No. 61-18296 (pages 8-9, FIG. 2)

  In the conventional hoisting machine described in Patent Document 1, the small diameter portions at both ends of the bolt 25 are inserted into the holes provided in the frame 24, but the frame 24 is inserted into the screw portions at both ends. The diameter of the hole provided in the bolt 25 is set to be slightly larger than the diameter of the screw portion at both ends of the bolt 25. Therefore, the bolt 25 is fastened by the nut 26, and the frame 24, the brake cover 23, and the gear case 22 are fixed. However, since a slight gap is formed between the screw portions at both ends of the bolt 25 and the hole portion of the frame 24, when the hoisting machine body is subjected to a large impact during work, a deviation such as a gap occurs. Had the problem of doing.

  In addition, since both ends of the bolt 25 are fastened with nuts, at the time of assembly, the bolt end on one side must be fastened with a nut, then the main body must be reversed and the bolt end on the opposite side fastened with a nut. The assembly man-hour for the operation | movement was needed. Furthermore, since the tip of the bolt and the nut are exposed to the outside of the main body, rust is easily generated or damaged, and in such a case, disassembly for maintenance becomes difficult. Further, it is necessary to provide a space on the brake cover 23 and the gear case 22 for using a nut attaching tool such as a spanner for fastening the nut.

  Further, the reverse rotation preventing claw mounting means described in the above-mentioned Patent Document 2 is such that when the reverse rotation prevention claw is assembled, the end portion of the spring that is attached to the large diameter portion of the bolt is caused by the biasing force of the spring. It has a problem that a trouble occurs when assembling the reverse rotation prevention claw, which is narrowly inserted between the stepped portion provided between the large diameter portion and the small diameter portion of the bolt and the reverse rotation prevention claw. . In order to solve this problem, a stopper is provided at the bolt end, and the above-described problem is detected based on whether the stopper fits into a groove provided at the bolt end. For this reason, it is impossible to directly fix the bolt with the brake cover because the above-mentioned problem is difficult to find.

  In view of the above-described problems, the present invention aims to provide a hoisting and pulling machine that can be reduced in size and weight, is robust, and can be easily assembled and disassembled. An object of the present invention is to provide a hoisting tractor that restricts the movement of a spring that urges the claw and does not cause problems during assembly work.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and is a hoisting machine including a pair of frames that support a load sheave, a gear case that covers a load gear on one side of the frame, and a brake cover that covers a brake means on the other side. A traction machine having a pair of stepped portions interposed between a gear case and a brake cover and positioned in contact with the frame, and a small diameter portion extending from one of the pair of stepped portions and fitted into a recess of the gear case. The small-diameter portion extending from the other step portion has a spring attachment portion to which a spring is attached to which one end is attached to the frame and the other end is engaged to the reverse rotation prevention claw, and the claw attachment to which the reverse rotation prevention claw is attached And a spacer that is provided between the spring mounting portion and the claw mounting portion, and that has a regulating member that regulates the movement of the spring toward the reverse rotation prevention claw side, and penetrates and is fixed to the brake cover and the gear case. Pierce through the through hole provided in the spacer Bolt provided was a hoisting and pulling device, characterized in that the frame is fixed sandwiching bond with the inner end face of the stepped portion of the spacer and the gear case and the brake cover.

  According to the present invention, the hoisting machine main body frame is positioned and positioned by the step portion of the spacer, and when tightening with bolts, the frame is provided with the step portion provided on the spacer and the inner end face of the gear case and the brake cover. The frame is easy to position, and when the frame is fastened, there is no gap between the parts, so there is no misalignment between the frame and other parts, and it is compact and precise. Can be provided.

  Furthermore, according to the present invention, since a regulating member such as a flange is provided between the spring mounting portion of the spacer and the claw mounting portion having a smaller diameter than the spring mounting portion, the movement of the spring to the reverse rotation preventing claw side is restricted, and the reverse rotation Since the spring can be prevented from being pushed into the claw mounting part or falling off to the claw mounting part when assembling the prevention claw, it is not necessary to prevent it from falling off unlike conventional devices, and the spacer is brought into direct contact with the brake cover. Can regulate the nails.

  The present invention is a hoisting tractor including a pair of frames that support a load sheave, a gear case that covers a load gear on one side of the frame, and a brake cover that covers a brake means on the other side, the gear case, A pair of stepped portions interposed between the brake covers and positioned in contact with the frame; a small diameter portion extending from one of the pair of stepped portions and fitted into a recess of the gear case; and extending from the other stepped portion The part has a spring attachment part where one end is attached to the frame and the other end is attached to the reverse rotation prevention claw, and a claw attachment part to which the reverse rotation prevention claw is attached. A spacer that is provided between the landing part and the claw mounting part and has a regulating member that restricts the movement of the spring toward the reverse rotation prevention claw side, and is fixed by penetrating the brake cover and the gear case. It is equipped with a bolt that penetrates the frame The hoisting and pulling machine is characterized in that the stepped portion of the spacer and the inner end face of the gear case and the brake cover are fixed tightly, and the hoisting machine body frame is positioned and positioned by the stepped portion of the spacer, When tightening with bolts, the frame is fixed tightly between the stepped part provided on the spacer and the inner end face of the gear case and brake cover, so that the positioning of the frame is easy and there is no gap between the frame and other parts. It is possible to provide a compact and precise hoisting tractor without any madness.

  Further, since the bolt is inserted into the through hole provided in the spacer, a hoisting and pulling machine that can be easily assembled and disassembled can be provided.

  In addition, since a regulating member such as a flange is provided between the spring mounting part of the spacer and the claw mounting part to restrict the movement of the spring to the reverse rotation prevention claw side, the spring is attached to the claw mounting part when the reverse rotation prevention claw is assembled. Providing a hoisting tractor that is easy to assemble because it can be prevented from being pushed in and does not require retaining, unlike the conventional device, and the spacer can be brought into direct contact with the brake cover to control the claw. can do.

  Further, the restriction member is a flange provided in a spring attachment portion of the spacer, and the restriction member is a flange provided in a spring holding member provided on the spring attachment portion of the spacer. Further, the restricting member is a protruding portion that protrudes from the reverse rotation preventing claw to the spring attachment portion side, and has the same function as that of the first aspect of the present invention.

[Embodiment 1]
Hereinafter, the hoisting tractor according to the first embodiment of the present invention will be described with reference to FIG. In the figure, reference numeral 1 denotes a gear case, which covers a load gear side gear of the hoisting and pulling tractor body, and is provided with a screw hole 1a into which a bolt, which will be described later, is screwed, and a recess 1b in which a spacer small diameter portion 4d is fitted. The inner end face 1c is provided so as to protrude from the inner side and close the frame. Reference numeral 2 denotes a brake cover that covers the brake means of the hoisting and pulling tractor body, and is provided with a bolt fitting insertion hole 2a into which a bolt, which will be described later, is inserted, and a recess 2b into which a spacer small diameter portion is fitted, so An inner end face 2c is provided. Further, on the brake means side of the brake cover 2, a bulging portion 2d that bulges as much as the space of the brake means is provided, and further, there is a seat portion 2e that houses the head of the bolt. Reference numeral 3 denotes a support frame for the hoisting and pulling machine main body, which has a hole portion into which the small diameter portion 4d of the hollow spacers 4a and 4b is fitted. The bolts 6 that penetrate the hollow spacers 4a and 4b are fastened to the main body. 4a and 4b are hollow spacers that define the mounting position of the frame 3 and the interval between the frames 3, and have small diameter portions 4d at both ends. The load gear side small diameter portion 4d of the hollow spacer 4a includes the hole portion of the frame 3 and the gear case. 1, the brake means side small-diameter portion 4 d is fitted and fixed to the hole portion of the frame 3 and the concave portion 2 b inside the brake cover 2. The load gear side small diameter portion 4d of the hollow spacer 4b is fitted in the inner concave portion 1b of the gear case 1, and the brake means side small diameter portion 4d is fitted and fixed to the hole portion of the frame 3. Further, the portion into which the reverse rotation preventing claw 16 engaged with the claw wheel 8 is inserted is a small diameter portion 5c, and the reverse rotation preventing claw 16 is supported. The hollow spacers 4a and 4b define the distance between the frame 3 at three locations by a pair of stepped portions 5a and 5a, and the hole provided in the frame, the recess 1b of the gear case, and the recess 2b of the brake cover 2 have a small diameter portion. Since the fitting is performed at 4d, the frame 3 and other parts can be assembled without a gap, so that the displacement of the spacer 4 in the longitudinal direction can be restricted. Further, the frame 3 is fixed tightly between the step portions provided in the hollow spacers 4 a and 4 b and the inner end surfaces 1 c and 2 d of the gear case 1 and the brake cover 2. The hollow spacer 4b has a step portion 5b for restricting the axial movement of the reverse rotation preventing claw 16. Reference numeral 6 denotes a bolt having a hexagonal hole in the head, which is fitted into the hollow spacers 4a and 4b from the bolt insertion hole 2a provided in the brake cover 2, and its end is screwed into the screw hole 1a of the gear case 1. Fixed. Therefore, when the bolt 6 is fastened, the frame 3 is tightly fixed by the inner end face 1c of the gear case 1 and the step portions 5a of the hollow spacers 4a and 4b. In the figure, 7 is a brake plate, 8 is a claw wheel, 9 is a brake receiver, 10 is a drive member, 11 is a drive shaft, 12 is a load gear, 13 is a load sheave, 14 is an idle spring, 15 is a handle, and 16 is reverse rotation. The prevention claw 17 is a spring.

  As described above, the present invention is interposed between the gear case 1 and the brake cover 2, and is fitted into the stepped portion 5 a provided on the joint surface of the frame 3 and the recesses 1 b and 2 b of the gear case 1 and the brake cover 2. Spacers 4a and 4b having a small diameter portion 4d, bolts 6 penetrating through through holes provided in the spacers 4a and 4b, and penetrating the brake cover 2 and the gear case 1 are provided. The main body frame 3 on which the load sheave 13 is axially mounted is provided with a stepped portion of the hollow spacers 4a and 4b. The frame 3 is positioned by the positioning of the frame 5 and the frame 6 is positioned, and the bolt 6 is fastened to fix the frame 3 to the stepped portion 5a provided on the spacers 4a and 4b. Narrow and fixed on the inner end face of the shoe 1 and the brake cover 2, and the hole 4 of the frame 3, the recess 1b of the gear case 1 and the recess 2b of the brake cover 2 are fitted by the small diameter part 4d of the spacers 4a and 4b. Since there is no gap between the frame and other parts, there is no deviation such as misalignment, and a compact and precise hoisting tractor can be provided.

  Further, since the bolt 6 is inserted into the hollow spacer 4 from the side of the insertion hole 2a of the brake cover 2 and the end is screwed and fixed to the screw hole 1a of the gear case 1, the gear case 1 is assembled at the time of assembly. After mounting other parts such as gears and brake means, the brake cover 2 can be covered and bolts 6 can be inserted and fixed from above the brake cover 2 so that the main body needs to be reversed. It is possible to provide a hoisting and pulling machine that is easy to assemble and disassemble.

  Furthermore, the bolt 6 head is housed in the seat 2e of the brake cargie 2 and the end is screwed into the screw hole 1a of the gear case, so that no nut is required and the bolts are not exposed to the outside. Therefore, it is possible to provide a hoisting tractor that solves the problem that it becomes difficult to disassemble due to the occurrence of rust and damage to bolts when the main body falls.

  In addition, since a bolt with a hexagonal hole is used in the head without using a nut, a compact hoisting tractor can be provided in which the use space of the spanner on the gear case 1 and the brake cover is suppressed. .

In the above embodiment, the hollow spacers 4a and 4b have been described. However, a similar spacer can be provided, and a hollow spacer is used as the spacer. It is only necessary that the position can be determined and the frame can be tightly fitted between the gear case and the inner end face of the brake cover. Similarly, although the bolt has been described as a form that penetrates the spacer, it may be any form that allows the spacer to be narrowed without being penetrated by the spacer.
[Embodiment 2]
Next, another embodiment of the present invention will be described with reference to FIGS.

  In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and description of each component is omitted. In FIG. 2, 4e is a spring-clamping portion provided so as to be connected to the small-diameter portion 4d of the hollow spacer 4b and may have the same diameter as the small-diameter portion 4d or a smaller diameter than the small-diameter portion 4d. Reference numeral 5c denotes a claw mounting portion on which the claw 16 is axially attached, and may have the same diameter as the spring attachment portion 4e or may have a smaller diameter than the spring attachment portion 4e. 5d is a flange portion provided between the spring mounting portion 4e and the claw mounting portion 5c, and restricts the movement of the spring 17 toward the claw 16 side. 16 is a reverse rotation prevention claw that is pivotally attached to the claw mounting portion 5c of the hollow spacer 4b, and 17 is a reverse rotation prevention claw that straddles the frame side locking portion 17a and the flange 5d that are locked to the frame 3, as shown in FIG. 16 is a spring that urges the reverse rotation prevention pawl 16 in the clockwise direction in the figure and is attached to the spring mounting portion 4e of the hollow spacer 4b.

  In the present embodiment, since the flange 5d is provided between the spring mounting portion 4e of the hollow spacer 4b and the claw mounting portion 5c on which the reverse rotation prevention claw 16 is pivotally attached, the movement of the spring 17 toward the reverse rotation prevention claw 16 is prevented. Since the spring 17 can be prevented from falling off the claw mounting portion 5c when the reversal prevention claw 16 is assembled, the hollow spacer 4b is not directly attached to the brake cover 2 as shown in FIG. Since the reverse rotation preventing claw can be regulated by being brought into contact with the hoist, it is possible to provide a hoisting and pulling machine that can be easily assembled.

  In FIG. 3, a spring holding member 18 having a flange 18 a on the reverse rotation prevention claw 16 side is externally mounted on the spring attachment portion 4 e, and a spring 17 is attached to the spring holding member 18 to bias the reverse rotation prevention claw 16. It is a thing. In this embodiment, since the movement of the spring 17 toward the reverse rotation prevention pawl 16 is restricted by the flange 18a as in the above embodiment, the hollow spacer 4b is directly attached to the brake cover 2 without the need for retaining at the time of assembly. The reverse rotation preventing claw 16 can be regulated by abutting.

  In FIG. 4, the reverse rotation preventing claw 16 is provided with a protruding portion 16 a that protrudes toward the spring attachment portion 4 e and contacts the side surface of the spring 17, and the protrusion 16 a restricts the movement of the spring 16 toward the reverse rotation preventing claw 16. As in the above embodiment, since the movement of the spring 17 toward the reverse rotation preventing claw 16 is restricted, it is not necessary to prevent the spring 17 from coming off during assembly, and the hollow spacer 4b is directly applied to the brake cover 2. The reverse rotation preventing claw 16 can be regulated by contact.

  The form of the protruding portion 16a is not limited to that shown in FIG. 4, and the protruding portion 16a is not inserted into contact with the side surface of the spring 17, but is inserted between the spring mounting portion 4e and the spring, It is also possible to regulate the movement of 17 toward the reverse rotation prevention claw 16 side.

  FIG. 5 is a side view showing a mounted state of the spring 17. In FIG. 5, 17a is a frame side locking portion where the spring 17 is locked to the frame 3, 17b is a claw side locking portion which is locked to the reverse rotation prevention claw 16, and the reverse rotation prevention claw 16 is shown in FIG. Thus, it is urged in the arrow direction, that is, clockwise. When the spring 17 urges the reverse rotation preventing claw 16 in the direction of the arrow, the spring winding portion 17c is provided on the spring winding portion 17c extending from the claw side locking portion 17b of the spring 17 due to the reaction force of the urging action of the spring. A springing force acts on the spring-clamping portion 4e side, the spring winding portion 17c is pressed against the spring-clamping portion 4e side, and the other portions are expanded upward in FIG. 5, that is, the flange 5d or the flanges 18a, 16a. Therefore, the flanges 5d, 18a, and 16a may have a shape that restricts only the spring winding portion 17c. By making the flange 5d or 18a, 16a into a shape that restricts only the spring winding portion 17c, the flange can be reduced in weight.

  In the above embodiment, the embodiment using the hollow flange has been described. However, the present invention is not limited to the hollow flange, and any shaft body can be used as long as it can be attached to the reverse rotation prevention pawl and the spring for biasing the reverse rotation prevention pawl. .

It is sectional drawing of the hoisting traction machine of this invention. It is a side view of the brake device of the present invention. It is a partial expanded side view which shows the spring of a brake device, and a reverse rotation prevention nail | claw part. It is a partial expanded side view which shows the spring of a brake device, and a reverse rotation prevention nail | claw part. It is an enlarged front view of a reverse rotation prevention nail. It is a schematic diagram which shows a conventional apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gear case 1a Screw hole 1b Recessed part 1c Inner end surface 2 Brake cover 2a Bolt fitting insertion hole 2b Recessed part 2c Inner end surface 2d Swelling part 2e Seat part 3 Frame 4a, 4b Hollow spacer 4d Small diameter part 4e Spring fitting part 5a, 5b Step part 5c Claw mounting portion 5d Flange 6 Bolt 7 Brake plate 8 Claw wheel 9 Brake receiver 10 Drive member 11 Drive shaft 12 Load gear 13 Load sheave 14 Floating spring 15 Handle 16 Reverse rotation prevention claw 16a Protruding portion 17 Spring 17a Frame side locking portion 17b Claw side locking portion 18 Spring holding member 18a Flange

Claims (4)

  A hoisting tractor comprising a pair of frames that support a load sheave, a gear case that covers a load gear on one side of the frame, and a brake cover that covers a brake means on the other side, between the gear case and the brake cover A pair of stepped portions that are positioned in contact with the frame and have a small diameter portion that extends from one of the pair of stepped portions and fits into a recess of the gear case, and extends from the other stepped portion, One end has a frame attached to the frame and the other end attached to a spring that is locked to the reverse rotation prevention claw; and a claw attachment portion to which the reverse rotation prevention claw is attached. A spacer that is provided between the mounting parts and has a regulating member that regulates the movement of the spring to the reverse rotation prevention claw side, and a bolt that is fixedly provided by penetrating the brake cover and the gear case, and penetrating the through hole provided in the spacer. With the frame spacer The stepped portion and the gear case and the hoisting and pulling device, characterized in that the narrow adhesive fixing in the inner end surface of the brake cover.   The hoisting and pulling machine according to claim 1, wherein one end of the spring is locked to the frame and the other end is locked to the claw.   The hoisting and pulling machine according to claim 1 or 2, wherein the restricting member is a flange provided at a spring attachment portion of a spacer.   The hoisting and pulling machine according to claim 1 or 2, wherein the restricting member is a flange provided on a spring holding member that is externally mounted on a spring mounting portion of a spacer.

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