WO2006048959A1 - Sucking mechanism and sucking device - Google Patents

Abstract

A sucking mechanism and a sucking device. The sucking device capable of sucking a sucked object by a large suction force only when the sucked object is present without being arrested by the positioning order of a suction pump and the sucked object, comprising a suction port (110) sucking the sucked object (3) and a connection hole (120) to which a branch tube (21) branched from the suction pump (2) is connected and which sucks a gas in an indoor space (15). The device also comprises a flow passage switching mechanism (1a) which, when the sucked object (3) is not present at the suction port (110), sucks the minute amount of gas through a first flow passage (4) with a slight clearance between a through hole (134) and a guide member (112) reduced by covering a connection hole (120) by a shield member (13) and, when the sucked object (3) is present at the suction port (110), releases the shield member (13) from the connection hole (120) and sucks the gas through a second flow passage (5) larger in the minimum flow passage width than the first flow passage (4).

Description

 Adsorption mechanism and adsorption device

 Technical field

 The present invention relates to an adsorption mechanism that adsorbs an object to be adsorbed. More specifically, the present invention adsorbs an object to be adsorbed with a large suction force only when the object to be adsorbed exists at a suction port. The present invention relates to an adsorption mechanism that can be made.

 Background art

 [0002] Generally, an apparatus for sucking an object to be sucked includes a plurality of suction ports for sucking the object to be sucked, a single suction pump for generating a suction force at the suction port, and a main pipe connected to the suction pump. And a branch pipe branched from the main pipe and a connection hole for connecting the branch pipe.

 [0003] The suction device configured as described above can suck a plurality of locations of an object to be sucked by a plurality of suction ports, but the suction port is not sealed depending on the state of the portion to be sucked, There is also a problem that air flows in and the suction force of other suction ports is weakened.

 [0004] In order to solve the problem, an adsorbing device as described in Patent Document 1 below has been proposed.

 [0005] As shown in FIG. 8, the suction device described in Patent Document 1 includes a suction port 60 for sucking the object 3 to be sucked, a flow channel 61 having a tapered inner surface, and the flow channel. A ball-shaped shielding member 62 capable of shielding 61 and an urging means 63 for urging the shielding member 62 toward the suction port 60, and the suction port 60 is sealed with the suction object 3. In this case (FIG. 8 (a)), the ball-shaped shielding member 62 is moved upward using the urging means 63 to open the flow path 61. On the other hand, when the suction port 60 is not sealed, that is, When the suction target 3 does not exist at the suction port 60 (Fig. 8 (b)), or when the surface of the suction target 3 is bad, the ball-shaped shielding member 62 is brought into contact with the tapered surface. Thus, the flow path 61 is closed and air is not sucked from the outside.

[0006] According to such a configuration, the suction port is not sealed depending on the surface state of the adsorption object. Even if it is not, the air outside the suction loca is not sucked, so the suction force of other suction ports is not weakened.

 Patent Document 1: JP 2001-267271 A

 Disclosure of the invention

 Problems to be solved by the invention

 [0007] However, the configuration as in Patent Document 1 has the following problems. That is, in the configuration as shown in FIG. 8, when the suction pump is operated with the suction port 60 open, the ball-shaped shielding member 62 blocks the tapered inner surface, and the flow path 61 is It is completely closed, and air cannot be sucked from the suction port 60 at all. For this reason, even if the suction target object 3 is brought into contact with the suction port 60 after the flow path 61 is closed in this way, the suction target object 3 cannot be sucked.

 [0008] Therefore, in order to suck the suction target 3 in the configuration of FIG. 8, first, the suction target 3 must be accurately positioned at the suction port 60, and then the suction pump must be operated. Absent. In addition, when the position of the suction target 3 is corrected after the suction pump is operated in this way, the pump is stopped again, the ball-shaped shielding member 62 is also separated from the tapered surface force, and then the suction is again performed. The pump must be activated.

 [0009] In the configuration of FIG. 8, the ball-shaped shielding member is sandwiched between narrow portions of the tapered inner surface, but if the surface friction on the inner surface is large, the shielding member bites in strongly. There is a possibility that the shielding member cannot be pushed up only by the force of the biasing member.

 [0010] Therefore, the first object of the present invention is made by paying attention to the above-mentioned problem, and there is an adsorption target in the suction port that is not restricted by the positioning order of the suction pump and the adsorption target. It is an object of the present invention to provide a suction mechanism that can suck an object to be sucked with a large suction force only when the suction target is on.

 [0011] In addition, the second object of the present invention is to allow an object to be attracted to be attracted with a strong force by moving the shielding member freely behind the suction port even when the attracting force is increased. The object is to provide an adsorption mechanism.

Means for solving the problem That is, in order to solve the above problems, the present invention includes a suction port that sucks an object to be sucked, and a connection hole that is connected to a suction pipe and sucks gas in an indoor space at the back of the suction port. When there is no object to be adsorbed in the mouth, gas is sucked in using the first channel having a minimum channel width narrower than the connection hole, and the object to be adsorbed is present in the suction port. In this case, a flow path switching mechanism having a minimum flow path width wider than that of the first flow path and sucking and sucking gas using the second flow path is provided.

 [0013] With this configuration, first, when there is no object to be adsorbed at the suction port, almost no gas is sucked from the suction port, so that the suction force can be suppressed and the connection is made via the suction pipe. The suction force of the other suction ports thus made will not be weakened. Even when the suction target is brought into contact with the suction port after the suction pump is operated, the gas in the indoor space can be sucked using the wide second flow path. The suction object can be sucked by force.

 [0014] Further, as a preferable aspect of the flow path switching mechanism, a shielding member that forms a first flow path that is narrower than an opening width of the connection hole by covering the connection hole, and movement of the shielding member A guide member that guides the gas in the shielding direction, and when the suction target does not exist in the suction port, the connection hole is covered with the shielding member to suck in the gas using the first flow path, When an object to be adsorbed is present at the suction port, the shielding member is separated from the connection hole along the guide member, and has a minimum flow path width wider than the first flow path. Inhale and inhale gas using the road.

 [0015] With this configuration, the movement of the shielding member can be guided by the guide member, so that the connection hole can be reliably covered.

 [0016] Further, as such a guide member, a member that is inserted with a gap between the through hole provided in the center of the shielding member and extended toward the center position of the connection hole is provided. Yes.

With this configuration, the first flow path can be provided in the extending direction of the center position of the connection hole, so that the first flow path force smoothly sucks and sucks gas into the connection hole. be able to . Further, the first flow path can be formed by the gap formed between the guide member and the shielding member, and the movement direction guidance and the flow path can be formed simultaneously. [0018] In addition, as another aspect of the flow path switching mechanism, a biasing means for biasing the shielding member toward the suction port side and a first member between the shielding member and the suction port are provided. A gap forming member that forms a gap wider than the minimum flow path width of the first flow path, and when the suction target does not exist at the suction port, the connection hole is covered with a shielding member to If the suction target is present at the suction port, the shielding member is brought into contact with the gap forming member using the biasing means, and the first flow path is used. The gas is sucked and taken in by using the second channel having a wider minimum channel width.

 With this configuration, the gap forming member is provided even when the shielding member is biased toward the suction port by the biasing means so as to form the second flow path. The second channel can be formed with a wider channel width without blocking.

 [0020] Further, the shielding member is moved in an indoor space provided in a cylindrical shape.

 [0021] With this configuration, even when the suction force is increased, the ball-shaped shielding member is not sandwiched between the tapered inner surfaces as shown in FIG. The wearing object can be sucked.

 The invention's effect

 [0022] The present invention includes a suction port with which an object to be adsorbed contacts and a connection hole for sucking a gas in the room at the back of the suction port, and when the object to be adsorbed does not exist in the suction port. Sucks gas using the first flow path having a narrower minimum flow path width than the connection hole, and if there is an object to be adsorbed at the suction port, In addition, since a flow path switching mechanism that sucks and sucks gas using the second flow path is provided with the smallest flow path width, when there is no object to be adsorbed at the suction port, the Since no gas is sucked in, the suction force can be suppressed, and the suction force of other suction ports connected via the suction pipe is not weakened. In addition, even when the suction target is brought into contact with the suction port after the suction pump is operated, gas can be sucked using the wide second flow path, so that a large suction force can be used. The suction object can be sucked.

 Brief Description of Drawings

FIG. 1 is a central sectional view of a suction member in an embodiment of the present invention. FIG. 2 is a central cross-sectional view of a sucking arch I member 90 degrees different from FIG.

 FIG. 3 is an external perspective view of an opening member in the same form.

 FIG. 4 is a view showing an operation example of the suction member in the same form.

 FIG. 5 is a view showing a suction device to which a suction member in the same form is applied.

 FIG. 6 is a central cross-sectional view of a suction member in a second embodiment.

 FIG. 7 is a central sectional view of a suction member according to a third embodiment.

 FIG. 8 is a principle diagram of a conventional suction device.

Explanation of symbols

1 ... Adsorption member

 1 & ... Flow path switching mechanism

2 ... Suction pump

3 ... Adsorption object

 4, 4a '... 1st channel

 5, 5a—Second channel

10 ... Casing

13 ... Shielding member

 13, 13 & ... shielding member

 14, 14 & ... energizing means

15 ... Indoor space

20

 21 ... Branch

100 ... Adsorption device

110 ··· Suction port

111 ··· Gap forming member

112 ··· Guide material

120 ... Connection hole

134 & ... hole

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 shows a central sectional view of the suction member 1 incorporating the suction mechanism in the first embodiment, and Fig. 2 shows another central sectional view that is 90 degrees different from Fig. 1. is there. In FIG. 1 and FIG. 2, since each member other than the gap forming member 111 is circular, only the direction of the gap forming member 111 is different. FIG. 3 shows an external perspective view of the opening member 11, which is upside down from FIG. 1 and FIG. FIG. 4 shows an operation example of the suction member 1, and FIG. 5 shows an outline of the suction device 100 to which the suction mechanism is applied. In this figure, for convenience of explanation, the suction port 110 is on the upper side and the connecting member 12 is on the lower side.

 As shown in FIG. 5, the adsorbing member 1 in this embodiment is connected to a branch pipe 21 branched from a main pipe 20 of a suction pipe connected to a single suction pump 2. As shown, the opening member 11 having a suction port 110 for sucking the adsorption object 3 (see FIG. 4), the connection member 12 having a connection hole 120 to which the branch pipe 21 of the suction pipe is connected, and these And a casing 10 having at both ends. Then, as shown in FIG. 4 (b), when suction is performed from the suction pump 2 in the state where the suction target 110 does not exist at the suction port 110, the first channel having a minimum flow path width narrower than that of the connection hole 120. When a very small amount of gas is sucked in using the flow channel 4 of Fig. 4 and the adsorption target 3 is present in the suction port 110 (Fig. 4 (c)), it is the highest than that of the first flow channel 4. The small channel width is wide! The second channel 5 is used to provide a channel switching mechanism la that sucks and sucks gas.

 [0027] Note that, as the suction object 3, for example, a printed board having a large number of electronic component mounting holes is used, but it is not necessarily limited to this printed board. Paper sheets, cards, other planar members similar to these, and members having concave or convex portions may be used.

[0028] The casing 10 constituting the suction member 1 has a linear cylindrical shape having a diameter of about 10 mm, and sucks the suction target object 3 into both end portions of the indoor space 15 having a vertically symmetrical shape. An opening member 11 to be connected to the connecting member 12 to which the branch pipe 21 of the suction pipe is connected is screwed. A flow path switching mechanism la for switching the flow paths having different minimum flow path widths is provided in the indoor space 15 formed in the casing 10. [0029] An outline of the flow path switching mechanism la will be described. The flow path switching mechanism la includes a shielding member 13 having a straight through hole 134 in the central portion, a guide member 112 that is inserted into the through hole 134 and guides the movement of the shielding member 13, and the shielding member 13. A biasing means 14 such as a panel that biases the suction port 110 toward the suction port 110, and a gap forming member 111 that secures a clearance between the suction port 110 and the shielding member 13 biased toward the suction port 110 by the biasing unit 14 It is configured with. When the shielding member 13 covers the connection hole 120, the first channel 4 having a narrow minimum channel width is formed by a slight gap formed between the through hole 134 of the shielding member 13 and the guide member 112. And when the shielding member 13 is separated from the connection hole 120 by the biasing means 14, the second flow path sucks the gas in the indoor space 15 through the side and the lower side of the shielding member 13. 5 is formed. That is, the first channel 4 and the second channel 5 having different minimum channel widths are switched by moving the shielding member 13 up and down along the guide member 112. Hereinafter, the configuration of the suction member 1 will be described in detail.

 As shown in FIG. 3, the opening member 11 screwed into the casing 10 has a hollow disk shape and has a circular suction port 110 inside thereof. In this embodiment, an example in which one suction port 110 is provided is shown. However, the present invention is not limited to this, and a plurality of minute holes may be provided. The upper surface side of the opening member 11 has a planar shape, and on the lower surface side, a gap forming member 111 that stretches a circular suction port 110 in the diameter direction, and extends to the lower surface side of the gap forming member 111. A linear guide member 112 is provided. The gap forming member 111 and the guide member 112 will be described later.

 [0031] The connecting member 12 screwed to the opposite side of the casing 10 is provided on the side of the indoor space 15 of the casing 10 and the connection hole 120 for connecting the branch pipe 21 and sucking the gas in the indoor space 15. And a biasing means mounting portion 122. The urging means mounting portion 122 is provided so that the outer peripheral portion of the connection hole 120 protrudes toward the indoor space 15, and the panel as the urging means 14 can be fixed to the outer peripheral portion. On the other hand, a taper surface 121 having a gradually narrowing facing width downward is provided at the opening boundary portion of the connection hole 120 on the indoor space 15 side so that the shielding member 13 is brought into contact with the taper surface 121. And

[0032] The shielding member 13 has a size capable of moving in the vertical direction in the casing 10, and has a spherical part 132 having a ball shape on the lower side and a rectangular part 130 having a flat part 131 on the upper side. And are provided. The spherical portion 132 is configured to abut against the small tapered surface 121 of the connection hole 120 and cover the connection hole 120. Further, the upper rectangular portion 130 abuts against a gap forming member 111 provided inside the opening member 11, thereby forming a gap for sucking gas between the suction port 110. Yes.

 As shown in FIG. 3, the gap forming member 111 is provided by extending a circular suction port 110 in the diametrical direction, and restricts the upward movement of the shielding member 13, and the gap The force also allows the outside gas to be sucked. The gap forming member 111 may be formed integrally with the opening member 11 or may be formed separately.

 A rod-shaped guide member 112 directed toward the center position of the connection hole 120 is provided at the central portion of the gap forming member 111. The guide member 112 guides the connection hole 120 by the spherical portion 132 of the shielding member 13 and is inserted into a through hole 134 provided at the center position of the shielding member 13. A slight gap is formed between the guide member 112 and the through hole 134, and the first flow path 4 having a narrow minimum flow path width is formed by this gap.

 The panel as the biasing means 14 always applies a force to the shielding member 13 toward the suction port 110. One end side of the biasing means 14 is fixed along the outer peripheral portion of the biasing means mounting portion 122 of the connecting member 12, and the other end side is a boundary between the spherical portion 132 and the rectangular portion 130 of the shielding member 13. Fixed to the urging means mounting part 133 of the part. When the shielding member 13 is positioned on the upper side by the urging means 14, the connection hole 120 is opened, and the second flow path 5 passing through the side and the lower side of the shielding member 13 is formed. The minimum channel width of the second channel 5 is set larger than the minimum channel width of the first channel 4. In other words, in order to increase the size of the second flow path 5, the gap between the shielding member 13 and the inner wall surface of the casing 10 is set as large as possible, and the separation width from the connection hole 120 is also set to be large. Is done.

Next, a suction operation using the suction member 1 will be described with reference to FIG. Fig. 4 (a) shows a state in which the suction target 3 is not present at the suction port 110 and the suction pump 2 is not operating, and Fig. 4 (b) shows the state from that state. FIG. 4 (c) shows a state in which the suction pump 2 is operated, and a state in which the suction object 110 is brought into contact with the suction port 110 in this state. It should be noted that the suction pump 2 in any of FIGS. 4 (a) to 4 (c) Shall operate continuously.

 [0037] First, in an initial state where the suction port 110 is open and the suction pump 2 is not operating! /, The shielding member 13 is formed by the urging force of the urging means 14 by the urging force. (Fig. 4 (a)). When the suction pump 2 is operated in this state, gas flows from the outside of the suction port 110, passes through the gap between the gap forming member 111 and the shielding member 13, and passes through the side and the lower side of the shielding member 13. Suction into connection hole 120. At this time, since the upper side of the shielding member 13 has a planar shape, the outside force of the suction port 110 directly hits the gas that flows in, and the pressure difference between the upper side and the lower side of the shielding member 13 becomes large. Press down. Then, the connection hole 120 is shielded by the spherical portion 132 of the shielding member 13 (FIG. 4 (b)).

 Then, this time, gas is sucked through the first flow path 4 formed between the through hole 134 of the shielding member 13 and the guide member 112. At this time, the minimum flow path width of the first flow path 4, that is, the gap width between the shielding member 13, the through hole 134 and the guide member 112 is set to be extremely narrower than the width of the opening of the connection hole 120. Therefore, the suction force at the suction port 110 is almost zero.

 Next, when the suction target member is brought into contact with the suction port 110 from this state (FIG. 4C), the suction from the outside of the suction port 110 is blocked by the presence of the suction target object 3. Since the suction operation from the suction pump 2 continues, the gas in the indoor space 15 of the casing 10 is sucked through the first flow path 4, and the pressure in the indoor space 15 gradually increases. Going down. The shielding member 13 is pushed upward by the urging force of the urging means 14 in a state where the pressures in the indoor space 15 and the connection hole 120 are substantially equal, and the second flow path 5 that is the same as the initial state is used. As a result, gas is sucked. At this time, since the minimum flow path width of the second flow path 5 is set wider than the minimum flow path width of the first flow path 4, the moment when the second flow path 5 is opened, The suction force suddenly increases, and the suction target 3 that is in contact with the suction port 110 is sucked with a large suction force.

As described above, according to the present embodiment, the suction port 110 for sucking the suction target object 3, the suction port 110 for sucking the suction target object 3, and the branch pipe 21 branched from the suction pump 2 are provided. Connected with a connection hole 120 for sucking gas in the indoor space behind the suction port 110, and the suction port 1 If the object 3 to be adsorbed is present at 10 and is narrow, the minimum flow path width is narrower than the connection hole 120. Gas is sucked using the first channel 4 and the object 3 to be adsorbed into the suction port 110. Is present, the minimum channel width is wider than the first channel 4 and the channel switching mechanism la that sucks and sucks gas using the second channel 5 is provided. When the suction target 3 does not exist at the suction port 110, the suction force at the suction port 110 can be made almost zero, and the suction force of the other suction ports 110 connected to the other branch pipes 21 can be reduced. It will not be reduced. In addition, even after the suction pump 2 is actuated, even if the suction object 3 is brought into contact with the suction port 110, gas is sucked using the wide second flow path 5, so that the suction target object can be obtained with a large suction force. 3 can be sucked.

 [0041] Further, by covering the connection hole 120, the shielding member 13 that forms the first flow path 4 narrower than the opening width of the connection hole 120, and the movement of the shielding member 13 in the shielding direction of the connection hole 120 When the suction object 3 does not exist in the suction port 110, the connection hole 120 is covered with the shielding member 13 and the gas is sucked using the first flow path 4. In addition, when the suction object 3 is present at the suction port 110, the shielding member 13 is separated from the connection hole 120 along the guide member 112, and the minimum channel width is wider than that of the first channel 4. Since the gas is sucked and taken in using the second flow path 5, the connection hole 120 can be reliably covered by the guide member 112. In addition, the first flow path 4 can be formed by the gap between the guide member 112 and the shielding member 13, so that the movement direction guidance and the flow path can be formed simultaneously.

 [0042] Further, since the guide member 112 is inserted into the through hole 134 provided at the center of the shielding member 13 and extends toward the center position of the connection hole 120, the first member 112 is used. The flow path 4 can be provided in the extending direction of the connection hole 120, and the gas from the first flow path 4 can be sucked smoothly. In this embodiment, since the guide member 112 is used, the shielding member 13 can be moved at an accurate position.

In this flow path switching mechanism la, the urging means 14 for urging the shielding member 13 guided by the guide member 112 toward the suction port 110 side, the shielding member 13 and the suction port 110 are further provided. A gap forming member 111 that forms a gap wider than the minimum channel width of the first channel 4 is provided between them, and when the suction object 3 does not exist at the suction port 110, the connection hole 120 shielding member When the suction target 110 is present in the suction port 110, the shielding member 13 is formed as a gap by using the biasing means 14. Since the gas is sucked using the second flow path 5 which is in contact with the member 111 and has a minimum flow path width wider than the first flow path 4, the shielding member 13 is sucked into the suction port by the biasing means 14. Even when biased to the 110 side, the flow path can be formed without blocking the suction port 110 by the gap forming member 111.

 Further, in the above embodiment, the indoor space 15 of the casing 10 is configured in a vertically symmetric linear shape, and the ball-shaped shielding member 13 is moved up and down in the interior space 15, so that the prior art of FIG. As in the example, even when the suction force is increased, the ball-shaped shielding member 62 is not sandwiched between the tapered inner surfaces, and the suction target 3 can be sucked with a strong force. It ’s like this.

 Note that the present invention is not limited to the above-described embodiment, and can be carried out in various modes.

 For example, in the above-described embodiment, a panel is used as the urging means 14. However, for example, as shown in FIG. The shielding member 13 may be positioned on the suction port 110 side. In this case, gravity plays the role of the biasing means 14. Similarly, in this case, if the suction object 3 does not exist at the suction port 110, the shielding member 13 is sucked and sucked by the suction force to shield the connection hole 120, and the suction target object 3 is also sucked. 110, the shielding member 13 falls by its own weight when the pressure in the indoor space 15 of the casing 10 and the pressure of the connection hole 120 are almost equal, so that the minimum flow path width is smaller than that of the first flow path 4. The suction force can be increased at once using the wide second flow path 5. In FIG. 6, the same reference numerals as those in the first embodiment have the same configurations as those in the first embodiment.

In the above-described embodiment, the member that moves the indoor space 15 of the casing 10 is described as an example of the shielding member 13. However, the present invention is not limited to this, and the configuration shown in FIG. 7 is adopted. Also good. In FIG. 5, 110 is a suction port, 120 is a connection hole, 13a is a plate-shaped shielding member, and the same reference numerals as those in the first embodiment are used in the first embodiment. It has the same configuration as The shielding member 13a has a hole with a smaller opening width than the connection hole 120 at the center. 134a is provided, and the end of the shielding member 13 is provided with a hinge provided with a panel as a biasing means 14a. The shielding member 13a opens and closes in a direction that shields the connection hole 120 and in a direction that forms an angle of about 45 degrees. Further, the urging means 14a constantly urges the shielding member 13a in a direction to open the connection hole 120.

 The operation example in the second embodiment will be described. First, in a state where the suction object 3 does not exist in the suction port 110, the shielding member 13a is held in an opened state by about 45 degrees by the biasing means 14a. Has been. When the suction pump 2 is operated, the gas is sucked, and the shielding member 13a rotates in the closing direction with the suction, thereby shielding the connection hole 120. This time, a small amount of outside air is sucked through the hole 134a, which is the first flow path 4a provided in the shielding member 13a, and the suction force at the suction port 110 is almost zero. It becomes a state. When the suction object 3 is brought into contact with the suction port 110 in this state, the suction object 110 is shielded by the suction object 3, and the pressure in the indoor space 15 gradually decreases. Then, in a state where the atmospheric pressure in the indoor space 15 and the atmospheric pressure in the connection hole 120 are almost equal, the shielding member 13a is opened by the urging means 14a, and the minimum flow path width is smaller than that of the first flow path 4a. A wide second flow path 5a is secured. Then, by sucking the gas in the indoor space 15 by the second flow path 5a, the suction force can be increased at once.

Claims

The scope of the claims  [1] A suction port that comes into contact with the suction target and a connection hole that sucks gas in the indoor space behind the suction port, and when there is no suction target in the suction port, the connection hole When the gas is sucked in using the first flow path having a narrower minimum flow path width and there is an object to be adsorbed in the suction port, the minimum flow path width is smaller than that of the first flow path. An adsorption mechanism comprising a flow path switching mechanism for sucking gas using a wide second flow path.  [2] The flow path switching mechanism covers the connection hole to form a first flow path narrower than the opening width of the connection hole, and guides the movement of the shield member in the shielding direction. When a suction target is not present at the suction port, the connection hole is covered with a shielding member to suck in the gas using the first flow path and to suck the suction port. When an object is present, the shielding member is separated from the connection hole along the guide member, and gas is sucked using the second flow path having a minimum flow path width wider than the first flow path. The adsorption mechanism according to claim 1, wherein the adsorption mechanism is incorporated.  [3] The guide member is inserted with a gap between the guide member and a through-hole provided at the center of the shielding member, and is extended to the center position of the connection hole. Item 3. The adsorption mechanism according to Item 2.  [4] The flow path switching mechanism further includes a biasing means that biases the shielding member toward the suction port, and a minimum flow path width of the first flow path between the shielding member and the suction port. When a suction object is not present at the suction port, a gas is generated using the first flow path by covering the connection hole with a shielding member. When the suction target is present at the suction port, the shielding member is brought into contact with the gap forming member using the urging means, and the minimum flow path width is larger than the first flow path. The adsorption mechanism according to claim 2 or 3, wherein a gas is sucked and taken in using the second wide flow path.  5. The suction mechanism according to claim 2, wherein the shielding member moves in an indoor space provided in a cylindrical shape. [6] A plurality of suction ports for sucking an object to be sucked, a suction pump for generating a suction force at the suction port, a main pipe connected to the suction pump, and a branch pipe branched from the main pipe A suction pipe and a connection hole to which the branch pipe is connected and sucks gas in the indoor space at the back of the suction port, and when there is no object to be adsorbed in the suction port, the connection hole If the suction object is present at the suction port, the minimum flow path width is wider than that of the first flow path. An adsorption apparatus comprising a flow path switching mechanism for sucking gas using a second flow path.