KR100881978B1 - Air balance of automatic sensing weight type - Google Patents

Abstract

The present invention relates to a weight auto-sensing type air balance that allows a perfect balance between the load value of a heavy article fixedly attached to the attachment means and the pressure value inside the air cylinder through a balance means consisting of a proportional valve and a pressure sensor. .

A post that acts as a prop; A pedestal formed to support the post to form wheels and support means; A main body having a control circuit part and a balance means built therein to operate a horizontal arm by a pneumatic method formed on the post; An air cylinder formed at one side of the main body and hinged to one side of the horizontal arm; A horizontal arm hinged to the air cylinder and formed in multiple stages to increase the working radius; A connection member formed of a bearing structure to allow 360 ° rotation between the post and the main body, and the horizontal arms formed of multiple stages, and the horizontal and vertical arms; A vertical arm formed perpendicular to the horizontal arm; A load sensing load cell supported by a load cell bracket at the bottom of the vertical arm to sense the weight of a heavy article; Attachment means coupled with the load sensing load cell to transport a predetermined weight article; And an air balance comprising a handle, wherein a control signal is applied to the balance means such that a balance is achieved between the load value of the heavy article transmitted from the load sensing load cell and the pressure value in the air cylinder, and the rising of the inside of the air cylinder. When the detected pressure value is detected by the pressure sensor, the exhaust valve of the balancing means operates to release excess air to maintain the balance, and when the lowered pressure value inside the air cylinder is detected by the pressure sensor, The control circuit unit controls the balance to be maintained by supplying air of insufficient pressure value by operating the air supply valve of the balance means; Formed between the proportional valve and the air cylinder and a proportional valve for supplying or discharging air of a constant pressure so as to balance the load value of the heavy article detected by the load sensing load cell with the air cylinder by receiving the control signal of the control circuit unit. It is intended to implement a weight automatic sensing air balance consisting of; a balance means consisting of a pressure sensor for detecting a pressure change inside the air cylinder and transmitting to the control circuit.

Air Balance, Balance Means, Proportional Valve, Air Cylinder, Load Cell

Description

Air balance of automatic sensing weight type

1 is a block diagram of a conventional zero gravity lifter

2 is a block diagram of an air balance applied to the present invention

Figure 3 is a configuration diagram of the operation of the proportional valve of the air balance applied to the present invention

* Description of Signs of Main Parts of Drawings *

1. Air Balance 10. Main Unit

11. Air cylinder 20. Load sensing load cell

30. Control circuit 40. Pneumatic means

50. Balance means 51. Pressure sensor

60. Proportional valve 61. Solenoid valve for air supply

62. Exhaust solenoid valve 63. Pilot seal

64. Diaphragm 65. Supply valve

66. Exhaust Valve

The present invention relates to a weight auto-sensing air balance, and more particularly, a perfect balance between the load value of the weight article fixedly coupled to the attachment means and the pressure value inside the air cylinder through a balance means consisting of a proportional valve and a pressure sensor. The present invention relates to a weight auto-sensing air balance.

In general, air balance is to enable assembly, mounting, and transportation in heavy industrial items such as automobile production lines, machine assembly lines, etc., in a state in which heavy items that are difficult for transport by workers are lifted to a predetermined height. Industrial sites use various types of air balance depending on the operation method, such as air type air balance, hydraulic type air balance, and electric type air balance.

The air type air balance rotates the air engine by using compressed air, and by lifting the rope around the drum by the rotation of the air engine can lift the heavy goods, the hydraulic air balance mainly by using a hydraulic pressure or a hydraulic cylinder Lifting heavy items, the electric air balance uses electricity as a power source to transport heavy items that are difficult for the operator to carry.

The conventional air balance is configured to move through the support guide rail at a place where a production line for assembling a car and a machine is formed, and thus it is always fixed at a predetermined position so that the air balance can be moved to another place. If the device must be disassembled and installed, it may cause a safety accident due to a large amount of time and installation work, and the overall configuration of the air balance is complicated, resulting in deterioration of work efficiency due to difficulty in operation.

Due to the problems of the conventional air balance, the structure and operation are simple, and the need for an air balance that is easy to move to a place to be used has emerged, and a lot of hydraulic or pneumatic air balances have been commercialized, and this type of weightlessness Looking at the configuration of the "load cell control gravity-free lifter" of the patent application 2004-14090 introduced as a lifter concept, as follows.

As shown in FIG. 1, an air cylinder is provided at one side of the body, and the air cylinder is hinged to one side of the main arm hinged to the idle shaft of the body, and the support arm is connected to the upper body of the main arm. One side of the hinge is coupled, the other side of the main arm and the other side of the support arm is hinged to the secondary arm, respectively, the load sensing load cell is coupled to the end of the secondary arm by a load cell bracket, one side of the load sensing load cell In the load cell controlless gravity lifter provided with a load gripping apparatus, one side of the load cell bracket further includes a handle coupled to a work sensing load cell, and the signal value of the work sensing load cell is converted from a signal value transmitted from the load sensing load cell. It is configured to control the pressure of the air cylinder in the controller by adding or subtracting, Comprises a configuration in which the servo valve that converts the pressure value, maintained by the regulator to be equal to the pressure of the pressure air cylinder and converted in the pneumatic servovalve.

The conventional load cell controlless gravity lifter has the advantage of allowing the operator to easily move the load by depressing the pressure in the air cylinder even when the operator applies a predetermined force up and down by separately detecting the operator's operation through the work sensing load cell. However, it is only a function of a simple lifter in which the air cylinder is raised or lowered by the input signal of the work sensing load cell operated by the handle, and there is no balance function. There is a problem that the efficiency is lowered and the structure is complicated.

The present invention has been made to solve the above-mentioned conventional problems, by providing a constant pressure value to the inside of the air cylinder to be proportional to the load value according to the weight change of the weight article through the balance means consisting of a proportional valve and a pressure sensor The operator aims to improve work efficiency by allowing him to work in zero gravity, which is always fully balanced.

Post acting as a holding post to achieve the above object; A pedestal formed to support the post to form wheels and support means; A main body having a control circuit part and a balance means built therein to operate a horizontal arm by a pneumatic method formed on the post; An air cylinder formed at one side of the main body and hinged to one side of the horizontal arm; A horizontal arm hinged to the air cylinder and formed in multiple stages to increase the working radius; A connection member formed of a bearing structure to allow 360 ° rotation between the post and the main body, and the horizontal arms formed of multiple stages, and the horizontal and vertical arms; A vertical arm formed perpendicular to the horizontal arm; A load sensing load cell supported by a load cell bracket at the bottom of the vertical arm to sense the weight of a heavy article; Attachment means coupled with the load sensing load cell to transport a predetermined weight article; And an air balance comprising a handle, wherein a control signal is applied to the balance means such that a balance is achieved between the load value of the heavy article transmitted from the load sensing load cell and the pressure value inside the air cylinder, and the rising of the inside of the air cylinder. When the detected pressure value is detected by the pressure sensor, the exhaust valve of the balancing means operates to release excess air to maintain the balance, and when the lowered pressure value inside the air cylinder is detected by the pressure sensor, A control circuit unit for controlling the balance to be maintained by supplying air of insufficient pressure value by operating the air supply valve of the balance means; Formed between the proportional valve and the air cylinder and a proportional valve for supplying or discharging air of a constant pressure so as to balance the load value of the heavy article detected by the load sensing load cell with the air cylinder by receiving the control signal of the control circuit unit. It is intended to implement a weight automatic sensing air balance consisting of; a balance means consisting of a pressure sensor for detecting a pressure change inside the air cylinder and transmitting to the control circuit.

Hereinafter, with reference to the drawings will be described in detail with respect to the automatic weight sensing type air balance (1) applied to the present invention.

FIG. 2 is a configuration diagram of the air balance 1 applied to the present invention, and FIG. 3 is an operation configuration diagram of the proportional valve 60 of the air balance 1 applied to the present invention, and reference numeral 2 is a post, 3. Silver pedestal, 3a is wheel, 3b is support means, 4 is horizontal arm, 5 is connection member, 6 is vertical arm, 7 is attachment means, 8 is handle, 9 is heavy goods.

As shown, when the load sensing load cell 20 recognizes the value of the weight change of the weighted article 9 and transmits the signal value according to the control circuit unit 30, the control circuit unit 30 load-loading load cell While maintaining the balance by controlling the balance means 50 through the signal value for the heavy article 9 transmitted from (20), the pressure sensor 51 to raise or lower the pressure value in the air cylinder (11) The pressure value and load sensing load cell inside the air cylinder 11 are always transmitted by transmitting a signal value detected and changed from time to time to the balance means 50 so that surplus air can be released to the atmosphere or air can be supplied to the air cylinder 11. The pressure value input from 20 is kept the same so that accurate balance can be achieved at all times.

The present invention is to maintain the correct balance according to the weight change value of the weight article (9) fixedly coupled to the attachment means (7) so that the operator can easily work, of the air balance (1) according to the present invention The overall configuration is as follows.

A post 2 serving as a support post, a pedestal 3 formed to support the post 2 to form a wheel 3a and a support means 3b, and a pneumatic method formed on the post 2 The main body 10 having the control circuit unit 30 and the balancing means 50 therein so as to operate the horizontal arm 4, and formed on one side of the main body 10 and hinged on one side of the horizontal arm 4. The air cylinder 11 to be coupled, the horizontal arm (4) which is hinged to the air cylinder 11 is formed in multiple stages to increase the working radius, and the post (2) and the main body (10) mutually, multi-stage A connecting member 5 formed of a bearing structure to allow a 360 ° rotation between the horizontal arms 4 and the horizontal arms 4 and the vertical arms 6, and formed vertically with the horizontal arms 4, respectively. A vertical arm 6 and a lower portion of the vertical arm 6 are supported by a load cell bracket (not shown) to support the heavy article 9. To load sensing load cell 20 for sensing and, in combination with the load sensing load cell (20) comprises a mounting means (7) and a handle (8) capable of carrying a predetermined weight of articles (9).

Hereinafter, the relationship between the air cylinder 11 and the balance means 50 to ensure accurate balance according to the weight change of the weight article 9 sensed by the load sensing load cell 20 corresponding to the gist of the present invention. Let's take a look at the center.

The load sensing load cell 20 is supported by a load cell bracket formed at the bottom of the vertical arm 6 to sense the load of the heavy article 9 fixedly coupled to the attachment means 7, and then the detected heavy article 9. The load value of is converted into an electrical signal value to be transmitted to the control circuit unit 30.

The control circuit unit 30 receives a load value of the heavy article 9 transmitted from the load sensing load cell 20, and then applies a control signal to the pneumatic means 40 to supply air of a predetermined pressure to the air cylinder 11. When the pressure inside the air cylinder 11 rises, the increased value is fed back by the pressure sensor 51 to operate the exhaust valve 66 of the balance means 50 to release excess air to the atmosphere. When the pressure in the air cylinder 11 is lowered, the lowered value is fed back by the pressure sensor 51 to control the air balance of the balance means 50. It operates to supply the air as much as the lowered pressure to the air cylinder 11 to control to maintain a constant pressure to maintain the balance.

The pneumatic means 40 is supplied with a control signal from the control circuit unit 30 to supply air of a predetermined pressure to the air cylinder (11).

The balance means 50 receives a control signal from the control circuit unit 30 to maintain the balance according to the weight of the weighted article 9 detected by the load sensing load cell 20 and the pressure sensor 60 and the pressure sensor. By forming a 51 to maintain the balance at a constant pressure at which the pressure inside the air cylinder 11 can move the heavy article 9, the pressure sensor 51 and the proportional valve 60 Formed between the air cylinders 11 to detect the pressure change in the air cylinder 11, and converts the detected pressure value into an electrical signal value and transmits it to the control circuit unit 30.

The proportional valve 60 is operated by receiving a control signal of the control circuit unit 30 according to the rising or lowering pressure value of the air cylinder 11 sensed by the pressure sensor 51, and the control circuit unit 30 The pilot chamber 63 which forms the air supply and exhaust solenoid valves 61 and 62 shielded by the control signal of (2), and supplies supply pressure to act on the diaphragm 64 by constant pressure air. And a diaphragm 64 operated by the elevated pressure of the air supplied to the pilot chamber 63 in conjunction with the air supply valve 65, and by the operation of the diaphragm 64. The exhaust valve 66 is shielded by the shielded air supply valve 65 and the solenoid valve 62 for exhaust. When the air supply valve 65 is opened and a part of supply pressure becomes the output pressure, Feedback to the control circuit unit 30 to output in proportion to the input signal of the control circuit unit 30 The operation until the force it is possible always to obtain the output pressure proportional to the input signal.

As described above, the operation of the automatic weight-sensing air balance 1 constructed by the embodiment of the present invention will be described in detail.

When the heavy article 9 of a certain weight is fixedly coupled to the attachment means 7 of the air balance 1 according to the present invention, the heavy article 9 by the load sensing load cell 20 coupled with the attachment means 7. ) Is detected, and the detected load value of the heavy article 9 is converted into an electrical signal value and transmitted to the control circuit unit 30.

The control circuit unit 30 receives the load value of the heavy article 9 transmitted from the load sensing load cell 20, and supplies air of a predetermined pressure to the air cylinder 11 through the pneumatic means 40. The supply pressure of the air cylinder 11 according to the load value of the heavy article 9 sensed by the load sensing load cell 20 is calculated by the following formula.

는 에어실린더(11)의 단면적, P는 에어실린더(11) 내부의 압력을 나타내는 것이다.Where W is the weight of the heavy article (9),

Is the cross-sectional area of the air cylinder 11, P is the pressure inside the air cylinder (11).

The control circuit unit 30 must supply the supply pressure calculated by the above formula into the air cylinder 11 to lift the heavy article 9 fixedly attached to the attachment means 7 to move to the desired place. When the heavy article 9 fixedly coupled to the attachment means 7 is moved while being moved in an elevated state, the supply pressure in the air cylinder 11 is also proportional to the weight change of the heavy article 9. Even if the worker moves in a state where the heavy article 9 is raised during operation, a perfect balance of weightlessness is achieved.

According to the present invention, when the load value for the weight change of the weighted article 9 is recognized through the load sensing load cell 20 to supply air of a constant pressure to the air cylinder 11, the air is provided through the balance means 50. After detecting the pressure change in the cylinder (11), it is to ensure accurate balance through the balance means 50 so that the supply pressure is maintained in proportion to the change in the pressure value.

That is, when the load value of the heavy article 9 is received by the control circuit unit 30 through the load sensing load cell 20, the control circuit unit 30 supplies to be supplied into the air cylinder 11 through the above calculation formula. After allowing the pressure to be calculated, air of a predetermined pressure is supplied to the air cylinder 11 through the pneumatic means 40.

At this time, when the balance means 50 is operated to transmit the pressure value changed by the pressure sensor 51 to detect the pressure change in the air cylinder 11 to the control circuit unit 30, the control circuit unit 30 is The control signal is applied to the proportional valve 60 to supply a constant pressure supply pressure to the air cylinder 11 so that an accurate balance can be maintained according to the load change value of the heavy article 9 fixedly attached to the attachment means 7. To be supplied.

For example, assuming that the weight of the article 9 is fixedly coupled to the weight article 9 of 40 kg, the air pressure for lifting the article 9 is 2.0 kgf. When fixedly coupled to the attachment means 7, the pressure inside the air cylinder 11 is increased while being compressed, and the elevated pressure is detected by the pressure sensor 51 and transmitted to the control circuit unit 30.

When the control circuit unit 30 receives 40 kg, which is a load value of the heavy article 9 transmitted from the load sensing load cell 20, the control circuit unit 30 calculates a supply pressure value 2.0 kgf to be supplied to the air cylinder 11 through the above calculation formula. After that, the supply pressure value 2.0kgf can be supplied through the proportional valve 60.

When the proportional valve 60 receives an input signal applied from the control circuit unit 30, the air supply solenoid valve 61 is turned on, and at this time, the exhaust solenoid valve 62 is turned off, The supply pressure is applied to the pilot chamber 63 through the air supply solenoid valve 61. When the pressure of the pilot chamber 63 rises, it acts on the upper surface of the diaphragm 64. As a result, the air supply valve 65 interlocked with the diaphragm 64 is opened so that a part of the supply pressure becomes an output pressure.

The output pressure is fed back to the control circuit unit 30, and the output pressure is continuously operated until it is proportional to the input signal applied from the control circuit unit 30, so that the input signal is always applied from the control circuit unit 30. The output pressure proportional to is obtained.

At this time, when the pressure inside the air cylinder 11 increases, the pressure sensor 51 detects the increased pressure and transmits the pressure to the control circuit unit 30, and the control circuit unit 30 increases the pressure. The control signal is applied to the proportional valve 60 so as to discharge the air to the air. The proportional valve 60 maintains the exhaust solenoid valve 62 in an ON state according to the control signal to close the exhaust valve 66. This allows air of a constant pressure to be released into the atmosphere.

On the contrary, when the pressure inside the air cylinder 11 falls, the pressure sensor 51 detects the lowered pressure and transmits the pressure to the control circuit unit 30, and the control circuit unit 30 is provided with air as much as the lowered pressure. The control signal is applied to the proportional valve 60 so as to supply the control valve. The proportional valve 60 maintains the ON state of the air supply solenoid valve 61 according to the control signal to maintain a constant pressure through the air supply valve 65. It is possible to supply air into the air cylinder (11).

As described above, the present invention provides the load value of the heavy article 9 and the air cylinder through the balance means 50 composed of the proportional valve 60 and the pressure sensor 51 so as to respond to the weight change of the heavy article 9. 11) It is possible to maintain a perfect balance between the internal pressure value, the present invention described above is within the scope not departing from the technical spirit of the present invention for those skilled in the art to which the present invention belongs Various substitutions, modifications, and alterations are possible, and are not limited to the above-described embodiments and the accompanying drawings.

The present invention by maintaining the correct balance of the pressure supplied to the air cylinder through the balance means in response to the weight change of the weight article by allowing the operator to easily move to the desired place by lifting the weight article in a weightless state In addition, the work efficiency is improved, and the product structure is simply configured, which improves the convenience and utility of the product.

Claims (2)

A post that acts as a prop; A pedestal formed to support the post to form wheels and support means; A main body having a control circuit part and a balance means built therein to operate a horizontal arm by a pneumatic method formed on the post; An air cylinder formed at one side of the main body and hinged to one side of the horizontal arm; A horizontal arm hinged to the air cylinder and formed in multiple stages to increase the working radius; A connection member formed of a bearing structure to allow 360 ° rotation between the post and the main body, and the horizontal arms formed of multiple stages, and the horizontal and vertical arms; A vertical arm formed perpendicular to the horizontal arm; A load sensing load cell supported by a load cell bracket at the bottom of the vertical arm to sense the weight of a heavy article; Attachment means coupled with the load sensing load cell to transport a predetermined weight article; And in the air balance consisting of the handle, A control signal is applied to the balance means so that a balance can be achieved between the load value of the heavy article transmitted from the load sensing load cell and the pressure value in the air cylinder, and the elevated pressure value in the air cylinder is sensed by the pressure sensor. If it is, the exhaust valve of the balancing means operates to release excess air to maintain the balance, and when the lowered pressure value inside the air cylinder is detected by the pressure sensor, the air supply valve of the balance means is operated. A control circuit unit for controlling the balance to be maintained by supplying air of insufficient pressure value; Formed between the proportional valve and the air cylinder and a proportional valve for supplying or discharging air of a constant pressure so as to balance the load value of the heavy article detected by the load sensing load cell with the air cylinder by receiving the control signal of the control circuit unit. Automatically weighing type air balance, characterized in that consisting of; a balance means consisting of a pressure sensor for detecting the pressure change inside the air cylinder and transmits to the control circuit. The method of claim 1, The proportional valve is a solenoid valve for supply and exhaust shielded by a control signal of the control circuit unit; A pilot chamber in which a supply pressure is supplied to act on the diaphragm by constant pressure air; A diaphragm operated by an elevated pressure of air supplied to the pilot chamber in association with the air supply valve; An air supply valve shielded by the action of the diaphragm; An exhaust valve shielded by the exhaust solenoid valve; When the supply valve is opened and a part of the supply pressure is the output pressure, a pressure sensor for detecting this and feeds back to the control circuit portion;

Images