JPH0720287U - Adsorption type article carrier - Google Patents

Abstract

(57) [Summary] [Object] A device for lifting and carrying an article by a vacuum suction force acting on a cup, which automatically prevents air leakage in the cup and prevents a pressure saturation phenomenon in a vacuum line. [Structure] A large number of suction means 20 provided on a plate 10
Each has a normally closed movable valve 16 inside the valve box 11. When the article is adsorbed to the lower end of the cup 12 by the vacuum suction force by the line 21, the movable valve 1
6 is kept open by the tension of the spring 17, but when the lower end of the cup 12 does not contact the article, the movable valve 16 closes the valve seat 26 against the tension of the spring 17 by the flow resistance of air.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for holding, for example, a large number of packaging groups simultaneously with a vacuum suction force and for carrying these groups simultaneously from one point to two points.

[0002]

[Prior art]

 When changing the position of a large number of randomly placed articles, it is common practice to hold each of these articles by suction with a number of vacuum cups, and move each article at once by moving each vacuum cup. Depending on the arrangement, the articles may not be adsorbed to the respective vacuum cups, and it is inevitable that air leakage will occur in the vacuum cups that do not partially adsorb the articles. Therefore, conventionally, when vacuum leakage occurs in some vacuum cups and the vacuum gauge does not rise, the line of the vacuum cup causing the air leakage is automatically closed by a solenoid valve, and the vacuum of other vacuum cups is closed. The pressure is not affected.

[0003]

[Issues to be solved by the device]

 However, in such a conventional example, it is necessary to provide a solenoid valve and a vacuum detecting means in each vacuum cup line, which is very economically problematic.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention installs a large number of adsorbing means 20 on a support plate 10 in an array, and connects each adsorbing means to a vacuum source 22 via an air circulation line 21. The adsorbing means 20 oppose the valve body 16 to the valve seat 26 in the valve box 11 connecting the air circulation line 21 in a normally open state by the reaction force of the spring 17. In addition to being installed, a small hole 19 is formed in the center of the valve body 16 where even a small amount of air leaks even when closed, while a cup 12 is connected to the lower end of the valve box 11.

[0005]

[Action]

 When the support plate is lowered from above a number of articles, the vacuum pressure immediately rises inside the cup that comes into contact with the articles due to the suction effect of the air circulation line, and the pressure difference between the primary side and the secondary side of the valve body immediately. Since it disappears, the valve body is held in an open state by the reaction force of the spring. However, since the air flow does not occur in the cup that does not contact the article, the valve body closes the valve seat against the reaction force of the spring, and the small amount of air flowing through the small hole stably closes the valve body. Let

[0006]

【Example】

 As shown in FIG. 1, a large number of valve boxes 11 are supported on a plate 10 in a vertically penetrating manner at equal intervals, and each valve box is provided with a bellows cup 12 which is vertically expandable and contractable. The valve box has a vertical passage 13 formed therein, a large-diameter valve chamber 14 formed in the lower portion of the passage, and a dome-shaped upper surface of an annular stopper 15 provided in the lower portion of the valve chamber. The movable valve 16 is tightly attached in a normally open state by the tension of the spring 17. As shown in FIG. 2, the movable valve 16 has a small-diameter breathing hole 19 in the central portion and an orifice 18 on the outside thereof. Further, as shown in FIG. 3, the suction means 20 each having a cup is connected to a vacuum source 22 through a concentrated normally closed type line 21. A vacuum source is composed of a pump 23 and an accumulator 24. When the plate 10 is moved, each adsorbing means 20 is brought into contact with the article group at the same time, and when the on / off valve 25 is opened, a large number of articles are adsorbed to each adsorbing means 20. . However, if articles are not adsorbed to the cup 12 in FIG. 1, flow resistance of air is generated in the orifice 18 of the movable valve 16, and the movable valve 16 closes the valve seat 26 against the tension of the spring 17 to cause a small diameter. A small amount of air is made to flow through the breathing hole 17 in order to stabilize the movable valve 16.

[0007]

【effect】

 According to the present invention, since a normally open type movable valve that is closed by differential pressure is provided inside each adsorption means, when the cup does not suffocate due to the absence of articles, the movable valve suffocates the passage. Since the air leakage is prevented in this state, there is an effect of preventing a decrease in vacuum pressure in a large number of other adsorption means.

[Brief description of drawings]

FIG. 1 is a sectional view of an adsorption means.

FIG. 2 is a plan view of a movable valve.

FIG. 3 is a front view of the entire apparatus

[Explanation of symbols]

11 ... Valve box 12 ... Cup 16 ... Movable valve 18 ... Orifice 19 ... Breathing hole 20 ... Adsorption means 22 ... Vacuum source 26 ... Valve seat

Claims (1)

[Scope of utility model registration request] 1. A plurality of suction means 20 are attached to a support plate 10.
Are arranged in an array, and each of the adsorbing means is connected to a vacuum source 22 via an air circulating line 21, and each adsorbing means 20 connects the air circulating line 21 to the valve box 11 For the valve seat 26 inside, the valve body 1
6 are installed so as to face each other in a normally open state by the reaction force of the spring 17, and a small hole 19 having a minute air leakage even when closed is formed in the central portion of the valve body 16, while An adsorption type article conveying device configured by connecting a cup 12 to the lower end.