JP6371116B2 - Suction tool - Google Patents

Description

  The present invention relates to an adsorbing device that adsorbs an object to be adsorbed by a negative pressure, and more particularly, to an adsorbing device that can move without considering the allowance for releasing the adsorption of an adsorption pad.

  Conventionally, when transferring a box on a box making line, the object (object to be adsorbed) is adsorbed by negative pressure, moved laterally, placed and released at the target location, and repeatedly returned to its original position. The unit is known.

  A part called a suction pad or a suction cup made of a flexible material such as rubber is used for the part that comes into contact with and adsorbs the article so that the negative pressure is suitably maintained (hereinafter, representatively suction It will be referred to as a pad).

  Here, paying attention to the suction release, the negative pressure is released and the suction pad contracted by the suction is extended. That is, the suction pad is pressed against the article by the elongation allowance length. Therefore, when returning the suction unit to the initial position, it is necessary to always raise at least the elongation allowance so as not to rub the surface of the article.

  Another example of the adsorption unit is shown in FIG. This shows a suction unit with a mandrel, which is used when a blank sheet is folded up by fitting a flat sheet along a mandrel into a push mold. After the sheet is folded up, the suction is released and the suction unit is lifted from the pressing die. In this example, the suction pad must be lifted with the amount of extension of the suction pad kept in contact with it.

  Therefore, in the first example, there is a problem that the degree of freedom of drive design is impaired, and in the next example, there is a problem that the suction pad is worn.

JP 2006-297636 A JP2001-079962 JP 09-323713

  The present invention has been made in view of the above, and provides an adsorbing device that adsorbs an object to be adsorbed by a negative pressure and that also prevents wear of the adsorbing pad while ensuring the degree of freedom in drive design. For the purpose.

The adsorbing device according to claim 1 is a seesaw body that rotates about an axis , and a flexible material that is oriented and extended in one direction of the seesaw body in a rotating direction and adsorbs an object to be adsorbed by negative pressure. The frustoconical suction pad and the bellows body, which is oriented in the opposite direction to the suction pad and extends to the seesaw body, closes the end of the bellows body, and is independent of the rotation of the seesaw body. A closing body that does not change its position with respect to the shaft, a fall prevention valve provided on the proximal end side of the suction pad, and a pressure transmission unit that transmits atmospheric pressure or hydraulic pressure to the suction pad and the bellows body. When negative pressure is applied via the transmission part, the fall prevention valve closes and the bellows body contracts , the suction pad comes into contact with the object to be adsorbed and starts contracting and suction is released, and the negative pressure is released. the bellows body elongation with suction pad releases the adsorbate, the adsorption pad Beyond elongation viewed content, characterized in that away from adsorbate.

  In other words, the invention according to claim 1 absorbs the extension of the suction pad by using the ON / OFF of the negative pressure accompanying the suction and suction release as it is, and wear of the suction pad is ensured while ensuring the freedom of drive design. It is possible to provide an adsorbing tool to prevent.

  As the seesaw body, a plate body or a rod body can be adopted. The rotation angle is not particularly limited as long as the rotation angle does not interfere with the substrate, the object to be adsorbed, the placement surface, and the like that move the adsorption tool. The shaft may be formed integrally with the seesaw body, that is, formed as a part of the seesaw body, or may be configured as a separate shaft inserted through a hole formed in the seesaw body. The bellows body is wide and is not particularly limited as long as it contracts by negative pressure and expands by releasing negative pressure. For example, a bellows body including a rubber tube including a spring is included. A fall prevention valve, also called a vacuum switching valve or a check valve, is a valve that closes due to negative pressure and communicates internally so that suction of the suction pad starts when the suction pad comes into contact with the object to be sucked Say. The extending direction of the suction pad and the bellows body does not have to be a strictly rotating direction (tangential direction), and may be appropriately tilted in relation to the suction surface of the object to be sucked. That the closing body does not change the position with respect to the axis means that the position does not change substantially with respect to the substrate or the object to be adsorbed. The base end side of the suction pad does not necessarily need to be directly attached to the suction pad, and may be provided in the middle of the gas or liquid passage. The pressure transmission medium may be gas or liquid, but gas is preferable because it can be easily controlled. The pressure transmission unit may be an example of a tube, and may be connected to a seesaw body as in claim 2 or connected to an adsorption pad (or fall prevention valve) and a bellows body as a bifurcated tube. You may do it. Depending on the mode of use, it may be configured as a tube (that is, two tubes) individually connected to the suction pad (or fall prevention valve) and the bellows body, and the pressure control is also performed individually. Also good. However, even if the control timing is different, it is preferable that the atmospheric pressure or the hydraulic pressure is applied simultaneously. When the fall prevention valve is closed, the bellows body contracts, or the suction pad releases the object to be adsorbed and the bellows body extends, both of which include not only exact simultaneous operation but also a time lag. It may be. The release of the negative pressure includes a mode in which positive pressure is applied.

  The suction tool according to claim 2 is the suction tool according to claim 1, wherein the pressure transmission unit is attached to the seesaw body, and the bellows body, the fall prevention valve and the suction pad, and the pressure transmission unit are provided inside the seesaw body. It is characterized by forming a passage that communicates with each other.

  That is, the invention according to claim 2 can simplify the configuration.

  Needless to say, the passage is substantially air-tight or liquid-tight.

  The suction tool according to claim 3 is the suction tool according to claim 1 or 2, wherein the bellows body contracts at a position where the normal direction of the suction surface of the object to be sucked matches the suction direction of the suction pad. It is characterized by providing a regulating body for regulating the length.

  That is, the invention according to claim 3 realizes suitable adsorption.

  The restricting body is fixed to a closing body independent of the rotation of the seesaw body.

  The suction tool according to claim 4 is the suction tool according to claim 1, 2, or 3, wherein the seesaw body has a shaft through-hole through which the shaft passes, and the closing body is connected to the shaft. Features.

  That is, the invention according to claim 4 does not separately attach the closing body to a base body or the like to which the adsorbing tool is attached to ensure independence, but secures independence by attaching it to the shaft, simplifying the device configuration and handling To increase.

  ADVANTAGE OF THE INVENTION According to this invention, it is an adsorption tool which adsorb | sucks a to-be-adsorbed object with a negative pressure, Comprising: The adsorption tool which prevents abrasion of an adsorption pad, ensuring the freedom degree of drive design can be provided.

It is the front view which showed the mode when the negative pressure was not applied in the suction tool of this invention. It is the front view which showed the mode at the time of non-adsorption | suction of the articles | goods at the time of applying a negative pressure in the adsorption tool of this invention, and the mode at the time of adsorption | suction. The presence or absence of shrinkage of the suction pad occurs. It is explanatory drawing which showed the mode until it moves horizontally from mounting of the articles | goods W, and leaves | separates. It is explanatory drawing explaining the conventional adsorption | suction unit with a mandrel.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Here, for convenience of explanation, an example will be described in which the adsorber places the adsorbing rectangular parallelepiped article on a horizontal article placing surface, releases the adsorption, and leaves. FIG. 1 is a front view showing a state when negative pressure is not applied in the suction tool of the present invention. FIG. 2 is a front view showing a state when the article is not adsorbed and a state when the article is adsorbed when negative pressure is applied in the adsorbing tool of the present invention. For convenience of explanation, components are omitted as appropriate, and are drawn with different scale ratios.

  The adsorbing tool 1 mainly includes a seesaw body 10, an adsorbing portion 20 formed at one end of the seesaw body 10, and a bellows portion 30 formed at the other end of the seesaw body 10, and is attached to the base B. Moving.

  The seesaw body 10 is a plate body having a predetermined thickness, and a hole 11 is formed in a central portion, and a shaft 12 is inserted. The shaft 12 is provided with an attachment arm 121 to attach the suction tool 1 to the base B. That is, the shaft 12 is fixed to the base B via the mounting arm 121, and the seesaw body 10 pivots with respect to the base B.

  In addition, an air tube 13 is attached to the seesaw body 10, and the atmospheric pressure is transmitted to the adsorption unit 20 and the bellows unit 30 through a pump (not shown). An airtight hollow path 14 is formed inside the seesaw body 10, and the air tube 13, the suction pad 21, and the bellows body 31 communicate with each other. Thereby, the air pressure in the air tube 13 is simultaneously transmitted to both.

  The suction unit 20 includes a rubber frustoconical suction pad 21 and a fall prevention valve 22 attached to the proximal end of the suction pad 21. The fall prevention valve 22 is attached to one end of the seesaw body 10 and communicates with the hollow path 14. The suction pad 21 is oriented so as to be substantially orthogonal to the extending direction (longitudinal direction) of the seesaw body 10 and the shaft 12. Hereinafter, the side on which the suction portion 20 is provided is referred to as the front side of the seesaw body 10.

  The bellows portion 30 has a hollow bellows body 31 attached to the seesaw body 10 on the base end side, a closing plate 32 that closes the distal end side of the bellows body 31 and ensures airtightness of the bellows portion 30, and a closing plate 32 And a holding bar 321 attached to the arm 121. The extending direction of the bellows body 31 is opposite to the orientation direction of the suction pad 21. That is, as shown in the figure, the bellows body 31 is provided on the back side of the seesaw body 10 so as to sandwich the shaft 12, in a direction substantially perpendicular to the extending direction of the seesaw body 10 and the shaft 12.

  The bellows body 31 is made of rubber, and exhibits a restoring force when contracted based on its material properties and shape. As will be described later, when the negative pressure is released, the suction by the suction pad 21 is completed. At this time, the bellows body 31 extends, and the suction pad 21 is separated from the article W by the rotation of the seesaw body 10. In addition, since arrangement | positioning of the bellows part 30 is made opposite to the adsorption | suction part 20, even if the seesaw body 10 rotates, it also has an advantage that the bellows part 30 does not interfere with the article placement surface.

  In addition, since the closing plate 32 is substantially attached to the shaft 12, the position does not change with respect to the base B, and the movement of the seesaw body 10 is not affected. That is, the closing plate 32 can be said to be a component that realizes expansion and contraction of the bellows body 31 when the seesaw body 10 rotates.

  The closing plate 32 is provided with a regulating bar 322 in the normal direction of the closing plate 32 so that the rotation of the seesaw body 10 due to the contraction of the bellows body 31 stops at a position parallel to the article placement surface. I have to.

  Next, the movement of the suction tool 1 for suction release will be described. FIG. 3 is an explanatory diagram illustrating a state from the placement of the article W to the horizontal movement and separation. First, the article W is placed (FIGS. 3a and 3b). At this time, the suction tool 1 is sucking the article W, but the posture of the seesaw body 10 is horizontal.

  Next, the suction is released. Then, the bellows body 31 contracted by the negative pressure is restored. At this time, the suction pad 21 rises over its extension allowance by releasing the negative pressure while leaving the position of the base B, and leaves the article W (FIG. 3c). Finally, the base B moves horizontally without changing the height from the article placement surface (FIG. 3d).

  In principle, the above operation is a movement to eliminate the problem of the conventional suction unit with a mandrel, that is, the problem that the suction pad rubs the article.

  Regarding the suction operation, since the suction tool 1 uses the fall prevention valve 22, the suction portion 20 side is substantially sealed with the start of the negative pressure. Thereby, the bellows body 31 contracts. As the bellows body 31 contracts, the suction pad 21 descends and comes into contact with the article W, and the suction of the article W is started. The seesaw body 10 stops rotating due to the restriction of the restriction bar 322 at a position that is horizontal to the article placement surface. Note that the height of the base body B or the shaft 12 from the article placement surface may be set in consideration of the shrinkage allowance of the suction pad 21 as appropriate.

  As described above, according to the suction tool 1 of the present invention, the horizontal movement can be performed immediately after the suction is released, and the wear of the suction pad can be prevented while ensuring the degree of freedom in drive design.

  In addition, the suction tool of this invention is not limited to said aspect. First, the bellows body may be a double-cylinder type in which the outer periphery of the inner cylinder is in contact with the inner periphery of the outer cylinder, and the spring may be accommodated therein. Moreover, you may accommodate the control rod 322 in this double cylinder. Of course, when the bellows body 31 is employed, the regulation rod 322 can be accommodated therein. Further, instead of the restriction rod, the rotation of the seesaw body 10 may be restricted by the double cylinder itself. In other words, the rotation of the seesaw body 10 may be regulated by the cylinder itself when it becomes a cage-like body.

  In addition, the bellows portion 30 can be closer to the shaft 12 than the suction portion 20, and the substantial rotation amount of the suction portion 20 can be increased. The restriction position of the restriction bar 322 can also be determined in consideration of the shrinkage allowance of the suction pad 21 at the time of suction.

The air tube 13 may not be attached to the seesaw body 10 but may be divided into two or two in the middle and directly connected to the fall prevention valve 22 and the bellows body 31. In the case of dividing into two, it is possible to further optimize the ability of the fall prevention valve 22.

  Further, the shaft and the seesaw body can be integrated. In this case, bearings can be provided at both ends of the shaft, and the attachment arm 121 can be extended from this bearing and attached to the base B.

  In addition, although the base | substrate B was demonstrated as a different structure from the suction tool in the above example, it cannot be overemphasized that the suction tool including the base | substrate B may be sufficient. It can also be called an adsorption unit.

  The present invention can also be used for general-purpose suction / placement motion. That is, the substrate B can be used for descending → adsorption → raising of the substrate B → horizontal movement → lowering of the substrate B → releasing suction → raising → horizontal reverse movement of the substrate B → (lowering of the substrate B). Depending on the mode of use, the amount of increase in the substrate B can be reduced to 0 or less than the conventional amount, which can contribute to the recent demand for space saving and the like.

DESCRIPTION OF SYMBOLS 1 Adsorber 10 Seesaw body 11 Hole 12 Shaft 121 Mounting arm 13 Air tube 14 Hollow path 20 Adsorption part 21 Adsorption pad 22 Fall prevention valve 30 Bellows part 31 Bellows body 32 Closing plate 321 Holding bar 322 Restriction bar B Base W Article

Claims (4)

A seesaw body that rotates around an axis;
A frustoconical suction pad made of a flexible material that is oriented and extended in the rotational direction on one side of the seesaw body and that adsorbs an object to be adsorbed by negative pressure;
A bellows body sandwiching the shaft and oriented in the opposite direction to the suction pad and extending to the seesaw body;
A closing body that closes the end of the bellows body and does not change position relative to the axis independently of the rotation of the seesaw body;
A fall prevention valve provided on the proximal end side of the suction pad;
A pressure transmission unit that transmits atmospheric pressure or hydraulic pressure to the suction pad and the bellows body;
Have
Via the pressure transmitter
When negative pressure is applied, the fall prevention valve closes and the bellows body contracts , the suction pad comes into contact with the object to be adsorbed, and contraction starts.
When the negative pressure is released, the suction pad releases the object to be adsorbed, the bellows body extends , and the adsorbing pad moves away from the object to be adsorbed beyond the contraction . The pressure transmission part is attached to the seesaw body,
The adsorber according to claim 1, wherein a passage that communicates the bellows body, the fall prevention valve, the suction pad, and the pressure transmission unit is formed inside the seesaw body.   The regulation body which regulates the contraction length of a bellows body in the position where the normal line direction of the adsorption surface of a to-be-adsorbed object and the adsorption direction of an adsorption pad correspond is provided. Adsorber. The seesaw body has a shaft hole that allows the shaft to pass through.
The adsorbing tool according to claim 1, wherein the closing body is connected to a shaft.

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