JPH0682091U - Towing machine - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a tractor, and in particular, is characterized in that an electric drive unit having a motor is attached to a chain winding mechanism unit having a chain to obtain a portable electric configuration. To do. [Structure] The towing machine according to the present invention is a coupling recess provided in a chain winding mechanism (23) having a sprocket (20).
The output shaft (17a) of the electric drive (10) is detachably connected to (27a), and the chain winding mechanism (23) and each end (23a, 10a) of the electric drive (10) are boss-received. (2 IA, 21B) and the boss (10A) are detachably coupled to each other to obtain a detachable two-body traction machine.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a towing machine, and more particularly to a novel improvement for detachably mounting an electric drive unit having a motor to a chain winding mechanism unit having a chain to obtain a portable electric structure.

[0002]

[Prior art]

 For example, in the case of a lever hoist used for rebuilding a pillar of a building as this type of traction machine that has been conventionally used, as shown in FIG. 8, lower parts 1a and 2a of the pillars 1 and 2 and an intermediate part It is obliquely arranged between 1b and the upper portion 2c. That is, in the case of the first lever hoist 3, a pair of hooks 4a and 4b provided at both ends of the chain 4 are provided between the intermediate portion 1b and the lower portion 2a of the columns 1 and 2. In the case of the second lever hoist 5, the wire rope 6 connected to the upper portions 2c of the columns 1 and 2 is connected to the chain 8 via the wire clip 7, and this chain 8 is connected to the column 8 via the second lever hoist 5. 1 is connected to the lower part 1a.

[0003]

[Problems to be solved by the device]

 Since the conventional towing machine is configured as described above, there are the following problems. That is, in the above-mentioned conventional example, each lever hoist is operated by input, and the tension adjustment is largely due to the feeling and experience of the operator, and it is a heavy physical work for the operator. As the average age of workers increased, the work was extremely difficult.

The present invention has been made to solve the above problems, and an electric drive unit having a motor is attached to a chain winding mechanism unit having a chain to provide a portable electric structure. The purpose is to provide a traction machine adapted to obtain.

[0005]

[Means for Solving the Problems]

 A traction machine according to the present invention is a traction machine in which a chain is moved by a sprocket, and has a chain winding mechanism section having the sprocket and a coupling recess provided on the winding mechanism section and connected to the sprocket. A speed reducer for a chain winding mechanism, an electric drive body which is provided independently of the chain winding mechanism section and has a motor, an output shaft connected to the motor, the chain winding mechanism section and the electric drive. It has a boss receiver and a boss for detachably connecting each end of the body, the coupling recess and the output shaft have a non-circular cross section, and the tip of the output shaft has a tapered shape. is there.

More specifically, the non-circular cross-section has a square shape.

More specifically, the boss retainer is slidably provided with a boss retainer which is spring-biased inward through a linear bearing.

[0008]

[Action]

 In the towing machine according to the present invention, since the electric drive body having the motor is detachably attached to the chain winding mechanism through the boss and the boss receiver, the first hook of the chain is connected to, for example, the upper part of the pillar. Then, if the second hook fixed to the chain winding mechanism is connected to the lower part of another column and the motor of the electric drive is driven, the chain is wound through the sprocket and can be pulled. . Even if the electric drive is separated from the chain winding mechanism in this state, the chain will not be loosened by the chain winding mechanism reducer having at least one stage worm reducer that is connected to the sprocket. Furthermore, the coupling recess between the output shaft of the electric drive and the chain winding mechanism is non-circular and the tip of the output shaft is tapered, so that coupling between the coupling recess and the output shaft is easy.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the towing machine according to the present invention will be described in detail below with reference to the drawings. It should be noted that the same or equivalent parts as those of the conventional example are designated by the same reference numerals for description. FIG. 1 is a schematic diagram showing an overall configuration of a towing machine according to the present invention. In FIG. 1, reference numeral 10 is an electric drive body having a DC type motor 11 built therein. This motor 11 has a trigger switch 12 and a rotation direction switching lever 13 for driving the motor 11. The motor driver 14 included therein is connected, and the motor 11 and the motor driver 14 are configured to be driven by the secondary battery 15.

An overload protection unit 17 (for example, a well-known torque limiter configuration) is connected to the motor 11 via a speed reducer 16. The overload protection unit 17 has a rotating output shaft 17 a protruding therefrom. It is provided. The output shaft 17a has a quadrangular cross section with a non-circular cross section, and its tip is tapered.

The speed reducer 16 is provided with a rotation speed changeover switch 18, and a tension display meter 19 connected to the motor driver 14 is connected to the rotation speed changeover switch 18. The tension indicator meter 19 is configured to calculate the torque generated by the motor from the value of the current flowing through the motor 11 by the motor driver 14, and convert the torque into tension from the reduction ratio of the reduction gear 16 and the sprocket diameter of the sprockets 20 described later. In addition, the function can be obtained without using the torque sensor, and the scale conversion of the tension display meter 19 can be changed in association with the change of the reduction ratio.

The first end portion 10 a of the electric drive body 10 is detachably attached to the chain winding mechanism portion 23 having the chain 22 wound around the sprocket 20 by a one-touch coupling 21, and also the chain winding A second hook 25 is rotatably attached via a rotation mechanism 26 to the handle portion 24 that hangs downward at the second end portion 23a of the handle mechanism portion 23.

The second end 23a is provided with a coupling recess body 27 having a coupling recess 27a that can be fitted to the output shaft 17a, and the coupling recess body 27 has at least one stage worm reducer. The chain 22 is connected to the sprocket 20 via a speed reducer 28, one end 22a of the chain 22 is a free end, and the other end 22b is connected to a first hook 29. . Although not shown, the chain winding mechanism speed reducer 28 must have at least one worm speed reducer, and the number of speed stages can be increased or decreased according to the load on the chain. The coupling recess 27a has a non-circular cross section for detachably coupling with the output shaft 17a.

The tractor 30 shown in FIG. 1 is configured as shown in FIGS. 2 to 7, and the one-touch coupling 21 is provided at the second end 23a of the chain winding mechanism 23. It is composed of a pair of boss receivers 21A and 21B and a pair of bosses 10A (only one is shown in FIG. 4) provided at the first end portion 10a of the electric drive body 10.

That is, as shown in FIG. 5, the boss receivers 21A and 21B are arranged so that the overall shape thereof is approximately L-shaped and the mounting directions thereof are different from each other by 180 degrees. The boss 10A is configured to engage with the openings 21Aa and 21Ba of the boss receivers 21A and 21B.

Of the boss receivers 21A and 21B, one boss receiver 21B is provided with a boss retainer provided at the second end portion 23a so as to be vertically movable along the arrow P direction via the linear bearing 60. 61 is provided, and the boss retainer 61 is always biased by a spring (not shown) inward in the radial direction on the surface of the second end portion 23a so as to automatically close the opening 21Ba. ing.

Further, in a state where the chain 22 is pulled by tension, even when the electric drive body 10 is separated from the chain winding mechanism portion 23, at least one stage built in the chain winding mechanism speed reducer 28 is provided. The well-known worm speed reducer (not shown) is used to prevent the chain 22 from loosening. The trigger switch 12 also functions as a start / stop command and a rotation speed setting command. When the trigger switch 12 is inserted deeply, the rotation of the motor 11 is accelerated, and the rotation of the motor 11 is caused by the speed reducer 16, The sprocket 20 can be rotated in the forward and reverse directions via the load protector 17, the output shaft 17a, the coupling recess 27a, and the speed reducer 28 for the chain winding mechanism.

Further, the rotation speed changeover switch 18 is mechanically connected to the speed reducer 16 and can freely change the meshing combination of gears (not shown) therein. The tension display meter 19 is configured to select a speed reduction ratio, and the display scale of the tension display meter 19 can be switched in association with the rotation speed changeover switch 18.

Next, a case where the electric drive body 10 is attached to and detached from the chain winding mechanism section 23 in the above-described configuration will be described. First, while inserting the output shaft 17a of the electric drive body 10 into the coupling recess 27a of the chain winding mechanism portion 23, the respective bosses 10A are engaged in the openings 21Aa and 21Ba of the box receivers 21A and 21B. When the entire electric drive body 10 is slightly rotated, each boss 10A engages with each boss receiver 21A, 21B. In this state, by sliding the boss retainer 61 of one of the boss receivers 21B in the closing direction, the opening 21Ba of the boss receiver 21B is closed with the boss 10A built-in, and the boss 10A is locked to be electrically driven. The connection between the body 10 and the chain winding mechanism 23 is completed.

Next, the operation will be described. First, as shown in FIG. 7, the second hook 25 of the chain winding mechanism 23 is locked to the locking portion 40 of the lower portion 1a of the pillar 1, and the first hook 29 of the chain 22 is fixed to the wire clip of the wire rope 6. When the electric drive body 10 is actuated in the state where the electric drive body 10 is locked in the position 7, the sprocket 20 is rotated by the rotation of the motor 11 and the chain 22 is pulled to adjust, for example, the building condition of the pillar of the building. You can The tension of the chain 22 can be visually checked with the tension display meter 19, and the adjustment can be made as described above by the pushing degree of the trigger switch 12, the rotation speed changeover switch 18, and the rotation direction changeover switch 13. It can be done freely.

[0021]

[Effect of device]

 Since the towing machine according to the present invention is configured as described above, the following effects can be obtained. 1. By driving with an electric drive, it is possible to eliminate the muscular work of the worker. 2. By driving with an electric drive, the work time required for lever retraction work of conventional lever hoists can be shortened. 3. Since the quantitative value of tension can be known from the tension display meter of the electric drive, work can be performed without requiring a skilled worker. 4. The electric drive is cordless and can be easily carried. 5. The electric drive unit and the mechanical unit can be attached and detached with one touch, and since the mechanical unit does not loosen when there is tension, it is possible to operate many mechanical units with a small number of electric drive units. 6. Further, the output shaft of the electric drive body has a non-circular cross section and has a tapered shape, and further, it can be easily coupled with the coupling concave portion of the chain winding mechanism portion, so that the attaching / detaching work can be performed very easily.

[Brief description of drawings]

FIG. 1 is a block diagram showing a towing machine according to the present invention.

FIG. 2 is a front view showing the external appearance of the actual configuration of FIG.

FIG. 3 is a right side view of FIG.

FIG. 4 is a perspective view showing an exploded state of FIG.

5 is an enlarged perspective view showing the boss receiver of FIG. 4. FIG.

FIG. 6 is an enlarged perspective view showing the boss receiver of FIG.

FIG. 7 is a perspective view showing a pulled state.

FIG. 8 is a configuration diagram showing a pulled state by a conventional lever hoist.

[Explanation of symbols]

 10 Electric Drive 10A Boss 11 Motor 17a Output Shaft 20 Sprocket 22 Chain 23 Chain Winding Mechanism 21A, 21B Boss Receiving 10a, 23a End 27a Coupling Recess 28 Chain Reducer 60 Linear Bearing 61 Boss Presser

Claims (3)

[Scope of utility model registration request] 1. A traction machine in which a chain (22) is moved by a sprocket (20), and a chain winding mechanism section (23) having the sprocket (20) and the chain winding mechanism section (23). The sprocket (2
0) and a chain winding mechanism speed reducer (28) having a coupling recess (27a), and an electric drive body (motor) provided independently of the chain winding mechanism section (23). Ten)
And an output shaft (17a) connected to the motor (11), each end of the chain winding mechanism section (23) and the electric drive body (10)
Boss receiver (21A, 21B) for detachably connecting (23a, 10a)
And a boss (10A), the coupling recess (27a) and the output shaft
(17a) has a non-circular cross section, and the tip of the output shaft (17a) has a tapered shape. 2. The towing machine according to claim 1, wherein the non-circular cross section is a square. 3. A boss retainer (61) which is spring-biased inward through a linear bearing (60) on the boss receiver (21A, 21B).
The traction machine according to claim 1 or 2, wherein the traction machine is slidably provided.