JP3027081U - Balancer - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a balancer which has good maneuverability and can reduce the operation force by fixing a hoist to a column and suspending a load from a trolley via a moving pulley. SOLUTION: A trolley is arranged so as to be able to travel on an arm provided on a column, and a hoist having a drum capable of winding a cord is provided on the column, and the cord wound around the drum is attached to the trolley. After being hung down via the first pulley provided on the trolley, the trolley is further fixed to the arm via the second pulley provided on the trolley. The balancer is characterized in that a supporting member for supporting a load is provided, and the rope is wound and rewound by the drum so that the movable pulley is moved up and down so that the load supported by the supporting member can be moved up and down. .

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a balancer, and in particular, it winds and rewinds a rope with a hoist drum provided on a column, and balances it with a load through a trolley that is freely movable on an arm. It is related to a balancer that can stably lift the load.

[0002]

[Prior art]

 BACKGROUND ART Conventionally, for example, a hoist as disclosed in Japanese Utility Model Publication No. 62-1193 is known as an aid for an operator when lifting or moving a heavy object. The hoist disclosed in the above publication includes a suspension part that is suspended from a predetermined object, a box having an upper part fixed to the suspension part and an opening part at the lower part, and the opening part that seals the opening part. The cylinder and chain storage container attached to the section, the piston that slides in the cylinder, the first sprocket that is rotatably attached to this piston, and the side of the box that is airtightly inserted. A second sprocket fixed to the inner end of the box of the fixed shaft, a drum fixed to the outer end of the box of the shaft, one end fixed to this drum, and a load attachment part at the other end A strip, a chain having one end fixed in the box and the other end hanging down in the chain storage container through the first sprocket and the second sprocket, and the load attachment When lifting the load of this mounting the load, the box, cylinder, and a control device for supplying compressed air to the airtight chamber that will be formed by a chain container.

The above hoist balances the air pressure in the cylinder, which is composed of a chain container, piston, sprocket, drum, and the like, with the load, so that a slight force is applied to the load to raise and lower the load. The hoist can be moved, and the transmission of force can be smoothly performed with few failures.

[0004]

[Problems to be solved by the device]

 However, since the hoist described above has a hoist attached directly to the trolley that travels on the arm, the weight and volume of the entire trolley increase, and it is necessary to increase the strength of the arm to accommodate it. Furthermore, since the hoist moves with the trolley, the trolley equipped with the hoist may interfere with surrounding objects when the arm turns, which is dangerous and the front and rear operability also deteriorate. Further, since the weight of the load acts on the pulley of the hoist without being reduced in weight, there are various problems that a large operating force is required to rotate the pulley.

Therefore, in the present invention, the trolley provided on the arm and the hoist are separated, the hoist is fixed to the column, and a supporting member for supporting the load is suspended on the trolley by a rope. By lowering it, it is possible to provide a balancer which has good maneuverability and can be operated with a small operating force of half of the conventional operating force, and an object thereof is to solve the above problems.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the technical solution adopted by the present invention is to dispose a trolley that runs on an arm that is swingably mounted on a support, while a hoist having a drum on which a rope can be wound is installed on the support. The rope provided around the drum is hung downward through the first pulley provided in the trolley, and then fixed to the arm through the second pulley provided in the trolley, and hung downward. The rope is provided with a moving pulley, and the moving pulley is provided with a supporting member for supporting a load, and the rope is wound up and rewound by the drum so that the moving pulley is moved up and down and supported by the supporting member. This balancer is characterized by being able to raise and lower the load.

[0007]

[Embodiment]

 A balancer according to the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a balancer according to the present embodiment, FIG. 2 is a side sectional view of a hoist, and FIG. 3 is a sectional view of FIG. Is.

In FIG. 1, reference numeral 1 denotes a column, and the column 1 is erected and fixed on a pedestal 2, and an arm 3 is rotatably attached to the upper part of the column 1. A rail 3a is formed on the arm 3 along the arm axis direction, and a trolley wheel 4a of a front and rear trolley 4 is movably mounted on the rail 3a. The front and rear trolleys 4 are provided with a first pulley 5 and a second pulley 6, and a belt or wire (hereinafter referred to as a cord) 7 whose one end is fixed to the tip of an arm is first moved downward through the second pulley 6. After being hung down to form a U-shape, it is wound around the drum 17 of the hoist described later via the first pulley 5 again. A movable pulley 8 is supported on the U-shaped portion of the cord, and a supporting member (hook) 9 for supporting a load W is provided on the movable pulley 8. Note that the arm can be configured so as to be expandable and contractible as needed.

On the other hand, a hoist 10 is fixed to the upper part of the column 1 by appropriate means. The hoist 10 will be described with reference to FIGS. 2 and 3. A chain pin 12 is fixed to the inner side surface of a box 11 that constitutes the hoist body, and an arc-shaped guide 13 is fixed to the inner upper surface. There is. Further, a bearing 14 is attached to the side surface of the box, a shaft 15 is passed through the bearing 14, a sprocket 16 is fixed to the inner end of the shaft 15, and a drum 17 is fixed to the outer side. One end of a rope 7 made of a belt or a wire is fixed to the drum 17, and the other end of the rope is fixed to the tip of the arm via the front and rear trolley 4. .

On the other hand, a cylinder 18 and a chain container 19 are attached to the bottom surface of the box, and a balance piston 20 is slidably arranged in the cylinder 18. A sprocket 22 is rotatably attached to a balance piston 20 in a cylinder 18 via a bracket 21, and a chain 23 having one end fixed to a chain pin 12 is attached to a sprocket 22 and a sprocket 16 in this order, and the other end is chained. Place it in the storage container 19.

The box 11, the cylinder 18, and the chain storage container 19 communicate with each other via the box 11, but the connection portion and the like are hermetically sealed to form an airtight chamber. Although not shown, an air supply port is provided above the cylinder 18, and a control device for supplying compressed air into the airtight chamber when the load is lifted is attached to the side portion of the cylinder 18. In this control device, the regulator is composed of a valve, a changeover switch, etc., and by switching the changeover switch to load, no load and balance mode, air is supplied to the cylinder, exhausted or balanced. To do. Furthermore, a muffler (not shown) is attached to the bottom plate of the cylinder to allow air to flow in and out below the piston due to vertical movement of the piston.

Next, the operation of the balancer having the above structure will be described. When hoisting and moving an object, the arm 3 is swiveled in advance, the trolley 4 is moved right above the load, and the hook 9 is handed down. Then, the cord 7 is pulled and the drum rotates to the right. As a result, the sprocket 16 rotates clockwise and the chain 23 is pulled up. Therefore, the sprocket 22 attached to the balance piston 20 ascends together with the balance piston 20 while rotating.

When the hook 9 is pulled down to the suspended position, the operating switch (not shown) provided on the hook 9 is operated while the hook 9 is hooked to the load, and the cylinder 18 is set to a pressure balanced with the load. The set air is supplied from a supply port (not shown). Then, the pressure in the chamber above the balance piston 20 rises, and the balance piston 20 is pushed down. As a result, the sprocket 22 rotates clockwise to pull down the chain. Therefore, the sprocket 16 is rotated counterclockwise to move the chain 23, and the end of the chain 23 rises in the storage container 19. As the sprocket 16 rotates counterclockwise, the drum 17 also rotates counterclockwise, the cord 7 is wound around the drum 17, the hook 9 rises, and the load is lifted.

Since the load and the air pressure are balanced in such a state, it is possible to move the load up and down by applying a slight force to the load. When the arm 3 is raised to a desired position, the arm 3 is swiveled, and / or the front and rear trolley 4 is moved along the rail 3a, and when the arm 3 is carried to a predetermined position, the hook 9 is pulled down with a load applied. Then, the operation switch provided on the hook 9 is operated to release the air in the airtight chamber to remove the load from the hook 9, and the process returns to the beginning. Note that if the hook is removed from the load before the air in the airtight chamber is removed, the balance may be lost and the hook may be pulled up with a strong force.However, in order to eliminate such a situation, the hook 9 has a bounce prevention mechanism (not shown). It is set up. As described above, according to this embodiment, the trolley and the hoist are separated from each other, the hoist is fixed to the column, and the supporting member for supporting the load is suspended on the trolley by the rope. Therefore, the maneuverability is good, and the drum can be operated with a small operating force, which is half of the conventional operating force, and the structure can be simplified as a whole.

Note that, instead of the front and rear trolleys and hoists, it is possible to use trolleys and hoists having other configurations that can achieve the same function. The ropes are not limited to belts and wires, and ropes can be used. Wheels such as casters with a brake can be attached to the pedestal if necessary. The columns can also be configured to be able to move up and down as needed. It is possible to adopt a power type of arm swing. Furthermore, the present invention can be implemented in various other forms without departing from the spirit or the main features thereof. In addition, the above-described embodiments are merely examples in all respects, and should not be limitedly interpreted.

[0016]

[Effect of device]

 As described above in detail, according to the present invention, the trolley and the hoist are separated from each other, the hoist is fixed to the column, and the trolley has a supporting member for supporting the load via the movable pulley, which is hung by a cord. Therefore, when moving the trolley, interference with other objects is eliminated and maneuverability is improved. Since the front and rear trolleys are provided with moving pulleys, the drum can be operated with a small operating force, which is half the conventional operating force. As the operating force of the drum is reduced, the weight of the hoist can be reduced, contributing to cost reduction. And so on.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a hoist having an air balancer function according to the present embodiment.

FIG. 2 is a side sectional view of a hoist.

3 is a cross-sectional view of FIG.

[Explanation of symbols]

 1 Support 2 Base 3 Arm 4 Front and Back Trolley 5 First Pulley 6 Second Pulley 7 Rope 8 Moving Pulley 9 Supporting Member 10 Hoist 17 Drum

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display B66F 19/00 D

Claims (3)

[Scope of utility model registration request] 1. A trolley for traveling on an arm pivotably provided on a column is arranged, while a hoist having a drum capable of winding the cord is provided on the column, and the cord wound around the drum is provided. , A second pulley provided on the trolley after being hung down through the first pulley provided on the trolley
By fixing it to an arm via a pulley and providing a moving pulley on the line hanging downward, a supporting member for supporting a load is provided on the moving pulley, and the line is wound by the drum and unwound. A balancer, wherein the movable pulley is moved up and down so that a load supported by the support member can be moved up and down. 2. The hoist includes a balance piston arranged in a cylinder, and the balance piston is moved by a fluid to rotate a sprocket using a chain, thereby forming a drum provided coaxially with the sprocket. The balancer according to claim 1, wherein the balancer is configured to rotate so that the cord can be wound around a pulley and unwound. 3. The balancer according to claim 1, wherein the arm and the support column can be expanded and contracted as needed.