TW201703956A - Suction device and connection device using material piece of the same can simply suck - Google Patents

Abstract

The invention provides a suction device to proceed suction simply. The suction device of the invention comprises: the first connection pipe connecting the negative pressure tank and the negative pressure pump; the second connection pipe connecting the suction part and the negative pressure tank; a two-way valve mounted midway in the first connection pipe; and a three-way valve mounted midway in the second connection pipe. The inlet is connected to the negative pressure tank, the first outlet is connected to the suction part, and the second outlet opens outwardly.

Description

Suction device and connection device using the material of the suction device Field of invention

The present application claims priority on the basis of Japanese Patent Application No. 2015-124971 (filing date: June 22, 2015). This application refers to this application and contains all the contents of the same application.

The present invention is a connection device relating to a suction device and a web using the suction device.

Background of the invention

Up to now, the connection device for connecting the new web to the old web is as follows: first, the old web is overlapped with the new web; second, the front and rear of the web holder are held at the predetermined cutting position; At the cutting position, the new and the old pieces are simultaneously cut by the cutter; and the fourth side is sucked and held by the suction surface of the web holder to hold the rear end portion of the old web and the front end portion of the new web, while removing the old and new The unnecessary portion of the two sheets; the fifth, the suction surface of the web holder is attracted to hold the rear end portion of the old web and the upper end portion of the new web, and is attached by tape (refer to Japanese Patent Laid-Open Publication No. Hei 5-246589, No. 2005-15145).

In the connecting device of the above-mentioned web, in order to attract the old material Or a new piece of material, using the blower method. If the blower method is used for this purpose, the blower will be started every time the suction is performed, so that the system is large in size and the cost is increased.

Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide a suction device that can easily perform suction and a connection device that uses a web of the suction device.

Summary of invention

The present invention relates to a suction device, comprising: a suction portion that attracts a suction body; a negative pressure groove; a negative pressure pump; a first connection pipe that connects the negative pressure pump and the negative pressure groove; and connects the suction portion and the negative portion a second connecting pipe of the pressure groove; a two-way valve provided in the middle of the first connecting pipe; and a suction three-way valve provided in the middle of the second connecting pipe, the inlet is connected to the negative pressure groove, and the first outlet is The suction portion is connected to the second outlet, and the second outlet is opened to the outside. The control unit executes the following procedure: (1) The first program is such that the two-way valve is in an open state and the inlet of the suction three-way valve is in a closed state. And the negative pressure pump lowers the inside of the negative pressure tank to a set negative pressure -P1 lower than atmospheric pressure; (2) the second program causes the two-way valve to be in a closed state; (3) the third program causes the aforementioned The inlet and the first outlet of the suction three-way valve are in an on state, and the second outlet is in a closed state, and the suction portion is lowered to a negative pressure -P2 (where -P1 < -P2 < atmospheric pressure) to attract the suction body .

According to the present invention, the attraction can be easily performed.

1‧‧‧Old core

2‧‧‧New core

3,6,7‧‧‧guide rollers

4‧‧‧ moving into the roller

5‧‧‧ moving out of the roller

8‧‧‧Press roller

10‧‧‧Connecting device

12‧‧‧Upper moving body

14‧‧‧Lower moving body

16‧‧‧Up ontology

18‧‧‧Old web winding

20‧‧‧Upper attachment

21, 25, 33, 51, 55, 59‧‧‧ Attracting space

22‧‧‧Upper joint attraction

23, 27, 35, 53, 57, 61‧‧ ‧ attractive faces

24, 30, 48‧‧‧ rotating shaft

26‧‧‧Old material attraction

28‧‧‧Upper moving ditch

32‧‧‧With temporary attraction

34‧‧‧上带

36, 36‧‧‧ upper rail

38‧‧‧Upper actuator

40‧‧‧Underlying

42‧‧‧Under the attached body

44‧‧‧New material fixing section

46‧‧‧cutting device

50‧‧‧With temporary attraction

52‧‧‧Under the belt

54‧‧‧The former attraction department

56‧‧‧After the attraction department

58‧‧‧Cut cutter

60‧‧‧ upper and lower components

62‧‧‧ Medium actuator

64‧‧‧Up and down rail

66‧‧‧End fixing members

68‧‧‧Lower rail

70‧‧‧ lower actuator

72, 74‧‧ ‧ press actuator

76‧‧‧Spindle

78‧‧‧Racks

80, 82‧‧‧ wheels

84‧‧‧Land

86‧‧‧Frame

88‧‧‧Cutting device support

90‧‧‧ cross rail

92‧‧‧ spacer

96‧‧‧ moving the ditch

97‧‧‧District Board Department

98, 99‧‧‧ cut off space

100‧‧‧ attracting device

102‧‧‧Dust attraction

104‧‧‧Dust dust attracting mouth

106‧‧‧Dust dust suction

108‧‧‧1st check valve

110‧‧‧Negative pressure pump

112‧‧‧Power cylinder

114-1~114-7‧‧‧ Negative pressure tank

116‧‧‧2nd check valve

118-1~118-7‧‧‧Double-way valve

120-1‧‧‧Attracting two-way valve

120-2~120-7‧‧‧Attracting three-way valve

122-1~122-7‧‧‧ pressure gauge

123‧‧‧Main connecting pipe

124‧‧‧1st connecting pipe

126-1~126-7‧‧‧2nd connection tube

128‧‧‧Cylinder casing

130‧‧‧Piston

132‧‧‧1st space

134‧‧‧2nd space

150‧‧‧Negative pressure device

200‧‧‧Control device

W‧‧‧Material

W1‧‧‧Old material

W2‧‧‧New piece

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the beginning of a connecting device according to an embodiment of the present invention; The overall picture of the period state.

Fig. 2 is an external view of a connecting device of the tenth program.

Fig. 3 is a longitudinal sectional view showing the configuration of the connecting device.

Figure 4 is a cross section taken along line A-A of Figure 3.

Figure 5 is a plan view of the lower moving body.

Fig. 6 is an explanatory diagram of a connecting device in the first program.

Fig. 7 is an explanatory diagram of a connecting device in the second program.

Fig. 8 is an explanatory diagram of a connecting device in the third program.

Fig. 9 is an explanatory diagram of a connecting device in the fourth program.

Fig. 10 is an explanatory diagram of a connecting device in the fifth program.

Fig. 11 is an explanatory diagram of a connecting device in the sixth program.

Fig. 12 is an explanatory diagram of a connecting device in the seventh program.

Fig. 13 is an explanatory diagram of a connecting device in the eighth program.

Fig. 14 is an explanatory diagram of a connecting device in the ninth program.

Fig. 15 is an explanatory diagram of a connecting device in the tenth program.

Fig. 16 is an enlarged side view showing a state in which the old web and the new web are to be cut by the cutting device.

Figure 17 is a partial front elevational view of a portion of the state in which the old and new webs are to be cut by the cutting device.

18 is an explanatory view of the upper joint suction portion, the old web suction portion, the upper belt temporary suction portion, the lower belt temporary suction portion, the lower front suction portion, the lower rear suction portion, and the dust suction portion.

Fig. 19 is a general view of a suction device and a negative pressure device.

Figure 20 is a block diagram of a connecting device.

Figure 21 is a flow chart of the attraction device.

Form for implementing the invention

Hereinafter, a connecting device 10 for a web W according to an embodiment of the present invention will be described with reference to Figs. 1 to 21 . The connection device 10 uses the suction device 100, the cutting device 46, and the negative pressure device 150. In addition, "web W" refers to a long-sized sheet such as cloth, paper, film, metal foil, or the like. In the connection device 10, the "loading side" means the upstream of the conveyance of the web W, and the "removing side" means the downstream of the conveyance web W.

As shown in Fig. 1, the connecting device 10 has a small amount of the old web W1 wound around the old core 1, so that the new web W2 wound around the new core 2 is attached to the old web W1.

As shown in FIGS. 1 and 2, the old web W1 and the new web W2 are transported to a transport path in the horizontal direction. As shown in FIG. 1, the old web W1 passes through the transfer roller 4, passes through the transfer roller 4, passes through the connection device 10, passes through the carry-out roller 5, passes through the guide roller 6, and is guided to a coating device or the like. On the other hand, the new web W2 wound around the new core 2 passes through the guide roller 7, passes over the pressing roller 8 provided below the loading roller 4, and its front end portion is fixed to the connecting device 10.

Further, a pressing roller 9 is also disposed below the carry-out roller 5. As shown in FIG. 3, the pressing roller 8 and the pressing roller 9 are vertically moved up by pressing the actuators 72 and 74, respectively. The pressing roller 8 and the pressing roller 9 respectively have a breaking function, and the tension of the web W between the pressing roller 8 and the pressing roller 9 is maintained by both nips, and the upstream and downstream portions are blocked. The tension received is changed.

(1) Structure of the connecting device 10

The configuration of the connecting device 10 will be described with reference to Figs. 3 to 5 . The connecting device 10 is composed of an upper moving body 12 and a lower moving body 14.

(1-1) Upper moving body 12

First, the upper moving body 12 will be described with reference to Figs. 3 and 4 . The upper moving body 12 is disposed above the old web W1 and is configured to be freely movable in the horizontal direction. The main body of the upper moving body 12 (hereinafter referred to as "upper body") 16 is composed of the old web winding body 18, the tape attaching body 20, and the upper joining suction portion 22 from the loading side. The upper body 16 having the old web winding body 18, the upper tape attaching body 20, and the upper engaging suction portion 22 is disposed between the pair of left and right upper rails 36, 36, and the upper actuator 38 causes the upper body 16 moves horizontally along the upper rails 36,36.

The old web winding body 18 is formed in a cylindrical shape and is rotated in the conveying direction of the old web W1 by the rotating shaft 24. A suction surface 27 of the old web suction portion 26 is formed on a part of the outer peripheral surface of the old web winding body 18. At the end portion of the old web suction portion 26, an upper moving groove portion through which the cutter 58 passes is formed. 28. In other words, the suction surface 27 of the old web suction portion 26 is formed in the vicinity of the upstream side of the upper movement groove portion 28 provided in the width direction of the old web winding body 18. At the attraction surface 27, there are a plurality of suction hole openings. As shown in Fig. 4, pinions 76, 76 are provided on both sides of the rotating shaft 24 of the old web winding body 18, and the pinions 76, 76 are linear and horizontal with respect to both sides of the upper moving body 12. The arranged racks 78, 78 are screwed and rotated. The racks 78 are supported by a frame 86 for securing the connector 10. The upper rails 36, 36, the upper actuator 38, the lower rails 68, 68 and the lower actuator 70, which will be described later, are also fixed to the frame 86. Thereby, when the upper moving body 12 moves, the pinions 76, 76 will rotate. On the rack 78, the old web winding body 18 also rotates.

The upper tape attaching body 20 is formed in a cylindrical shape and is rotated in the conveying direction of the old web W1 by the rotating shaft 30. A portion of the outer peripheral surface of the upper tape attaching body 20 is provided with an upper tape temporary suction portion 32. Here, the suction surface 35 of the temporary suction portion 32 is provided with a plurality of suction hole openings for attracting the non-adhesive surface of the upper tape 34. Let it stay for a while. As shown in Fig. 4, on one side of the rotating shafts 24, 24 of the old web winding body 18, wheels 80 are provided, and the rotating shaft 30 of the upper strip attaching body 20 is also provided with wheels 82. As shown in Fig. 3, the wheel 80 and the wheel 82 are wound by the endless belt 84. When the old web winding body 18 is rotated, the upper tape attaching body 20 is also rotated in the same direction.

The upper joint suction portion 22 is a rectangular parallelepiped having a trapezoidal shape in a longitudinal section. The lower surface of the upper joint suction portion 22 is flat, and the suction surface 23 is formed, and on the suction surface 23, there are a plurality of suction hole openings. The suction surface 23 faces the transport path of the old web W1, and the joint portion between the old web W1 and the new web W2 is fixed by suction, and the lower tape attaching body 42 makes the attaching stable when the lower tape 52 is attached. Chemical.

(1-2) Lower moving body 14

Next, the lower moving body 14 will be described with reference to Figs. 3 and 5 . The lower moving body 14 is disposed below the new web W2 and is configured to be freely movable in the horizontal direction. The body of the lower moving body 14 (hereinafter referred to as "lower body") 40 is composed of a lower tape attaching body 42, a new web fixing portion 44, a cutting device 46, and an end fixing member 66.

The lower tape attaching body 42 is formed in a cylindrical shape and is rotated in the conveying direction of the new web W2 by the rotating shaft 48. A part of the outer peripheral surface of the lower tape attachment body 42 is formed with a lower belt temporary suction portion 50, and is temporarily attracted to the lower belt. The suction surface 53 of the portion 50 has a plurality of suction opening openings that attract the non-adjoining surface of the lower belt 52. Further, although not shown in the drawings, pinions are provided at both end portions of the rotating shaft 48 of the lower tape attaching body 42, and the racks fixed to the frame are screwed and rotated. Thereby, when the moving body 14 moves, the pinion gear rotates on the rack, and the lower belt attaching body 42 also rotates.

The new web fixing portion 44 has a lower front suction portion 54 and a lower rear suction portion 56 that face the conveyance path of the new web W2, and the lower front suction portion 54 and the lower rear suction portion 56 respectively attract the new web W2. Each of the suction surface 57 of the lower front suction portion 54 and the suction surface 61 of the lower rear suction portion 56 has a plurality of suction hole openings.

The cutting device 46 is provided between the lower front suction portion 54 and the lower rear suction portion 56, and the cutter 58 simultaneously cuts the overlapped old web W1 and the new web W2 in the width direction. The detailed structure will be explained later.

The end fixing member 66 is provided at the lower rear side of the new web fixing portion 44, and is wound and fixed to the front end portion of the new web W2.

The lower tape attaching body 42, the new web fixing portion 44, the cutting device 46, and the end fixing member 66 are provided between the pair of left and right plate-shaped upper and lower members 60, 60. Further, a pair of left and right upper and lower rails 64 and 64 are provided in front and rear of the lower body 40, and the middle actuator 62 moves the pair of left and right upper and lower members 60 up and down along the upper and lower rails 64 and 64.

The lower body 40 is movable in the horizontal direction along the lower rail 68 of the frame (not shown) in the horizontal direction, and the lower actuator 70 provided in the frame moves the lower body 40 in the horizontal direction.

(2) Cutting device 46

According to FIG. 16 and FIG. 17, the old overlap can be simultaneously cut off. The cutting device 46 of the web W1 and the new web W2.

(2-1) Structure of the cutting device 46

The configuration of the cutting device 46 will be described with reference to Figs. 16 and 17 . Between the lower front suction portion 54 and the lower rear suction portion 56, as shown in Fig. 16, a cutter support portion 88 of the cutting device 46 is provided, and the cutter 58 is provided upright from the cutter support portion 88. As shown in FIG. 17, the cutter 58 has a plate shape of a parallelogram shape, and is inclined toward the traveling side of the cutter 58 as it goes up. The cutter support portion 88 is horizontally moved between the pair of left and right horizontal rails 90, 90 provided between the lower front suction portion 54 and the lower rear suction portion 56 by a moving mechanism such as a cylinder. That is, it moves along the width direction of the old web W1 and the new web W2. Hereinafter, for ease of explanation, as shown in FIG. 17, the cutter support portion 88 as the cutter moving mechanism is a mechanism that moves from the left side to the right side of the old web W1 and the new web W2.

A spacer 92 is horizontally attached to the lower movable body 14 above the cutter support portion 88, below the upper end portion of the lower front suction portion 54 and the lower rear suction portion 56. In the spacer 92, a slit 94 is provided along the left-right direction, and the cutter 58 moves through the slit 94. The spacer 92 is formed of a sheet made of rubber.

As shown in Fig. 16, the side surface of the lower front suction portion 54, the side surface of the lower rear suction portion 56, and the space surrounded by the spacer 92 are hereinafter referred to as "lower movement groove portion 96". Moreover, the cylindrical space surrounded by the upper moving groove portion 28 and the old web W1 is hereinafter referred to as a "cutting space 98", and is a cylindrical space surrounded by the new web W2 and the lower moving groove portion 96. Hereinafter, it is referred to as "cut space 99". As shown in Fig. 17, dust is attached to the right side of the cylindrical cut spaces 98, 99. The attraction unit 102. The dust suction portion 102 has a substantially cylindrical shape and has an upper dust suction port 104 and a lower dust suction port 106. The left side of the cut spaces 98, 99 is open. Further, the cut spaces 98 and 99 are partitioned by the side faces of the lower front suction portion 54 and the reticle portion 97 extending from the lower rear suction portion 56 toward the right side. When the overlapped old web W1 and the new web W2 are cut, the air in the cut space 98 is sucked from the dust suction port 104 on the dust suction portion 102, and the cut space is sucked from the lower dust suction port 106. As shown in FIGS. 16 and 17, the air and the cutter 58 are horizontally moved from the left to the right in the cylindrical cut spaces 98 and 99 surrounded by the upper moving groove portion 28 and the lower moving groove portion 96.

(2-2) Operating state of the cutting device 46

The operation state of the cutting device 46 will be described with reference to Figs. 16 and 17 . First, the old web W1 is horizontally attracted and fixed by the lower front suction portion 54 and the lower rear suction portion 56, and a new web W2 is placed thereon, and the old web W1 is separated by the old web winding body 18. The new web W2 is fixed in a state of being overlapped and clamped. At this time, when the old web W1 and the new web W2 are to be cut, they are located in the cut spaces 98 and 99 surrounded by the upper moving groove portion 28 and the lower moving groove portion 96.

Then, the suction two-way valve 120-1 is opened, and the air in the cut space 98 is sucked from the dust suction port 104 on the dust suction portion 102, and the air in the cut space 99 is sucked from the lower dust suction port 106. As shown in Fig. 17, the air is attracted from left to right. This is because the left side of the cut spaces 98, 99 is open.

Then, when the cutter support portion 88 is moved along the cross rail 90, the cutter 58 is moved over the slit 94 through the slit 94 while being overlapped. The old web W1 and the new web W2 are cut in the width direction. The dust generated by the cutting is attracted by the dust suction portion 10 and does not adhere to the surface of the old web W1 or the new web W2.

Next, when the cutting of the overlapped old web W1 and the new web W2 by the cutter 58 is completed, the suction of the dust suction unit 102 is stopped.

Thereby, the cutting device 46 can end the cutting without causing dust to adhere to the surface of the old web W1 and the new web W2, and the connecting device 10 can proceed to the next program.

(3) Structure of the suction device 100 and the negative pressure device 150

Next, the structure of the suction device 100 and the negative pressure device 150 of the connection device 10 of the present embodiment will be described with reference to Fig. 19 . The suction device 100 is composed of a negative pressure pump 110, a power cylinder 112, a first check valve 108, a second check valve 116, seven two-way valves 118-1 to 118-7, and seven negative pressure grooves 114-1. 114-7, one suction two-way valve 120-1, six suction three-way valves 120-2 to 120-7, seven pressure gauges 122-1 to 122-7, a dust suction portion 102, and an upper engagement suction portion 22 The old piece suction unit 26, the upper belt temporary suction unit 32, the lower belt temporary suction unit 50, the lower front suction unit 54, and the lower rear suction unit 56 are configured. Among them, the negative pressure pump 110, the power cylinder 112, the first check valve 108, the second check valve 116, the seven two-way valves 118-1 to 118-7, and the seven negative pressure grooves 114- The negative pressure device 150 is constructed from 1 to 114-7.

The negative pressure pump 110 is such that the piston 130 slides in the cylinder sleeve 128 of the hollow cylinder, and the cylinder sleeve 128 is partitioned into the first space 132 and the second space 134 by the piston 130. The piston 130 is slid by the power cylinder 112. One end of the main connecting pipe 123 is connected to the first space 132 of the cylinder sleeve 128.

The other end of the main connecting pipe 123 is divided into two, one is connected to one end of the first connecting pipe 124, and the other is connected to one end of the second check valve 116. The other end of the first check valve 108 is opened to the outside, and the air flow in the first check valve 108 is a direction from the inside of the main connecting pipe 123 to the outside. The other end of the second check valve 116 is connected to one end of the first connecting pipe 124, and the other end of the first connecting pipe 124 is divided into seven, and the other ends of the branching are respectively connected with seven two-way valves 118-1~118- 7 one end connection. The air flow in the second check valve 116 is from the two-way valves 118-1 to 118-7 to the direction of the negative pressure pump 110. The other ends of the two-way valves 118-1 to 118-7 are connected to the negative pressure grooves 114-1 to 114-7, respectively.

The second connecting pipe 126 is connected to the suction portion and the negative pressure grooves 114-1 to 114-7 of the first to seventh systems, respectively. Further, between the second connecting pipes 126-1 to 126-7, a suction two-way valve 120-1, suction three-way valves 120-2 to 120-7, and pressure gauges 122-1 to 122-7 are provided, respectively. Each pressure gauge 122 can measure the pressure in each negative pressure tank 114. Further, the pressure gauges 122-1 to 122-7 have the function of notifying the control device 200 at a predetermined set pressure together with the pressure measurement. The suction two-way valve 120-1 is connected between the negative pressure groove 114-1 and the dust suction portion 102, and the inlets of the suction three-way valves 120-2 to 120-7 are respectively connected to the respective negative pressure grooves 114-2 to 114-7. Each of the first outlets of the suction three-way valves 120-2 to 120-7 is connected to each of the suction portions 22, 26, 32, 50, 54, and 56, and each of the second outlets is open to the outside.

(4) The operating state of the negative pressure device 150

Next, an operation state in which the negative pressure pump 114 is set to the negative pressure -P1 by the negative pressure pump 110 included in the negative pressure device 150 will be described.

First, in the initial state, the suction two-way valve 120-1 is closed. In the closed state, the inlets of the three-way valves 120-2 to 120-7 are closed, the first outlet and the second outlet are in an on state, and the two-way valve 118 is in an open state. The inside of the negative pressure tank 114 is atmospheric pressure.

Next, the power cylinder 112 slides the piston 130 of the negative pressure pump to expand the first space 132. Thereby, the negative pressure pump 110 sucks the air in the negative pressure groove 114 through the second check valve 116 and the two-way valve 118. Thereby, the pressure in the negative pressure tank 114 is lowered by ΔP from the atmospheric pressure. However, since the first check valve 108 does not attract air because the air flow is in the reverse direction.

Next, the power cylinder 112 slides the piston 130 of the negative pressure pump 110 to make the first space 132 the narrowest. The air in the first space 132 is discharged to the outside from the first check valve 108. However, in the negative pressure groove 114, since the air flow of the second check valve 116 is in the reverse direction, air is not sent to the negative pressure groove 114.

Then, the power cylinder 112 slides the piston 130 again to enlarge the first space 132. Thereby, the negative pressure pump 110 sucks the air in the negative pressure groove 114 through the second check valve 116 and the two-way valve 118. Thereby, the pressure in the negative pressure tank 114 is further lowered by ΔP from the previous negative pressure value.

Then, the operation as described above is repeated a plurality of times, the pressure of ΔP is decreased once and the negative pressure is gradually increased, and when the pressure gauge 122 measures the set negative pressure -P1, the operation of the negative pressure pump 110 and the power cylinder 112 is stopped, so that the double The valve 118 is in a closed state.

By the above operation, the inside of the negative pressure groove 114 can be lowered to the set negative pressure -P1.

(5) Structure of the attraction part

The respective suction portions of the seven systems will be described with reference to Fig. 18 .

The first system is the slightly cylindrical dust suction portion 102 described above, the suction body of the dust suction portion 102 is dust, the suction space is the cylindrical cutting space 98, 99, and the upper dust suction port 104 corresponds to the suction surface. The lower dust suction port 106 corresponds to the suction surface, and the second connection pipe 126-1 is connected. The upper dust suction port 104 is an empty cut space 98 that is surrounded by the old web W1 and the upper moving groove portion 28, and attracts dust together with the air, and the lower dust suction port 106 is from the new web W2. The cutting space 99 below the lower moving groove portion 96 attracts dust together with the air.

The upper joint suction portion 22 of the second system has a suction space 21 and a suction surface 23, and the suction body is a joint portion between the old web W1 and the new web W2. The suction space 21 is formed in the upper joint suction portion 22, and the second connection pipe 126-2 is connected. The attraction surface 23 is formed on the lower surface of the upper joint suction portion 22, and has a plurality of suction hole openings.

The old web suction portion 26 of the old web winding body 18 of the third system has a suction space 25 and a suction surface 27, and the suction body is the old web W1. The attraction surface 27 is formed on the outer peripheral surface of the old web winding body 18 by about 1/4, and has a plurality of suction hole openings. The suction space 25 is provided in the old web winding body 18 along the axial direction, has a size corresponding to the suction surface 27, and communicates with the suction port provided on the rotating shaft 24, and the second connecting pipe 126-3 is connected thereto. Attracting the mouth.

The upper belt attachment body 20 of the fourth system has a temporary suction portion 32 having a suction space 33 and a suction surface 35, and the suction body is an upper belt 34. The suction surface 35 is formed on the outer circumferential surface of the upper tape attachment body 20 in accordance with the length of the upper tape 34, and has a plurality of suction hole openings. The attraction space 33 has a large size corresponding to the attraction surface 35 It is small, and is provided in the upper tape attaching body 20 along the axial direction, and is connected to the suction port provided in the rotating shaft 30, and the second connecting pipe 126-4 is connected to the suction port.

The lower belt attachment body 42 of the fifth system has a temporary suction portion 50, and has a suction space 51 and a suction surface 53, and the suction body is a lower belt 52. The suction surface 53 is formed on the outer circumferential surface of the lower tape attachment body 42 in accordance with the length of the lower tape 52, and has a plurality of suction hole openings. The suction space 51 has a size corresponding to the suction surface 53, and is disposed in the lower tape attaching body 42 along the axial direction, communicates with the suction port provided on the rotating shaft 48, and the second connecting pipe 126-5 is connected to the suction port. .

The lower front suction portion 54 of the sixth system has a suction space 55 and a suction surface 57, and the suction body is a new web W2. The attraction surface 57 is formed on the upper surface of the lower front suction portion 54, and has a plurality of suction hole openings. The suction space 55 is formed in the lower front suction portion 54, and the second connection pipe 126-6 is connected.

The lower rear suction portion 56 of the seventh system has a suction space 59 and a suction surface 61, and the suction body is a new web W2. The attraction surface 61 is formed on the upper rear suction portion 56, and has a plurality of suction hole openings. The suction space 59 is formed in the lower rear suction portion 56, and the second connection pipe 126-7 is connected.

(6) Attraction method of attraction department

Next, a method of attracting the new web W2 by the lower front suction portion 54 of one of the seven systems will be described with reference to FIG.

In the initial state, the inside of the negative pressure tank 114-6 is lowered to the set negative pressure -P1 as described above. The suction three-way valve 120-6 has an inlet closed state, and the first outlet and the second outlet are in an on state. Therefore, the suction space 55 in the lower front suction portion 54 has a plurality of suction hole openings, and therefore is at atmospheric pressure.

First, the plural of the lower front suction portion 54 is made by the new web W2. The suction holes are closed, and the suction space 55 of the lower front suction portion 54 serves as a closed space.

Next, when the inlet and the first outlet of the suction three-way valve 120-6 are in the ON state and the second outlet is in the OFF state, the negative pressure groove 114-6 and the suction space 55 of the lower front suction portion 54 are negative. The internal pressure of the pressure groove 114-6 and the internal pressure of the suction space 55 of the lower front suction portion 54 are in an equilibrium state. That is, the internal pressure of the negative pressure groove 114 rises from the set negative pressure -P1 to -P4, and the internal pressure of the suction space 55 of the lower front suction portion 54 decreases from atmospheric pressure to -P4. Thus, when the internal pressure of the suction space 55 of the lower front suction portion 54 is lowered to -P4, the new web W2 can be attracted. The timing of this attraction can be instantaneously responded by operating the attraction three-way valve 120-6.

Then, when the suction of the new web W2 is completed, the lower front suction portion 54 can be opened by bringing the inlet of the three-way valve 120-6 to the closed state and the first outlet and the second outlet to the conductive state. The suction space 55 increases the pressure to atmospheric pressure and ends the attraction.

With the above, the suction space 55 of the lower front suction portion 54 can be simply lowered to -P4, and the new web W2 can be attracted.

(7) Electrical structure of the connecting device 10

Next, the electrical configuration of the connecting device 10 will be described based on the block diagram of FIG. The connection device 10 is provided with a control unit composed of a computer, that is, a control device 200. The control device 200 can perform the conveyance of the old web W1 and the new web W2, the conveyance at the conveyance speed, and the conveyance stop.

In the control device 200, an upper actuator 38 that moves the upper movable body 12, a lower actuator 70 that moves the lower moving body 14, and a middle actuator that moves the lower moving member 14 up and down the lower member 60 are connected. 62. Cutting device 46, The actuator 72 is pressed and the actuator 74 is pressed. Further, in the control device 200, the power cylinder 112 of the suction device 100, the seven two-way valves 118-1 to 118-7, one suction two-way valve 120-1, and six suction three-way valves 120-2 are connected. 120-7, 7 pressure gauges 122-1~122-7.

(8) Connection procedure of the connection device 10

Next, a procedure for connecting the old web W1 and the new web W2 by the connecting device 10 will be sequentially described with reference to FIGS. 1, 2, and 6 to 15.

First, as shown in Fig. 1, the control device 200 causes the old web W1 wound around the old core 1 to pass through the guide roller 3, the carry-in roller 4, the lower side of the moving body 12 on the connecting device 10, the carry-out roller 5, and the guide The roller 6 is conveyed in a horizontal state. Further, when the remaining amount of the old web W1 wound around the old core 1 is reduced, the control device 200 starts the operation of the connection device 10. Further, the operator previously attracts the suction surface 35 of the upper tape attachment body 20 to the non-adhesion surface of the upper tape 34, and the suction surface 53 of the lower tape temporary suction portion 50 is previously attracted to the non-adhesion surface of the lower tape 52.

In the first program, as shown in FIG. 1 and FIG. 6, the control device 200 conveys the old web W1 horizontally to the position of the loading roller 4, the lower moving body 12, and the carrying roller 5 as described above. On the other hand, the new web W2 is placed above the lower moving body 14 via the pressing roller 8 in a state of being horizontally arranged similarly to the old web W1, and is wound around the end portion of the lower moving body 14. The state of the fixing member 66 is fixed. That is, in the first routine, the control device 200 conveys the old web W1 in a horizontal direction at a constant conveyance speed, and the new web W2 is stopped in parallel with the old web W1 and at a lower position. Moreover, the control device 200 is provided by the upper actuator 38 and the lower actuator 70, respectively. The upper moving body 12 and the lower moving body 14 are aligned in the horizontal direction so that the upper moving groove portion 28 of the old web winding body 18 of the upper moving body 12 is located at the cutter protruding from the upper side of the lower moving body 14. 58 location. At this time, the alignment of the old web winding body 18 on the surface of the old web W1 is rotated. Hereinafter, this position is referred to as an "initial position".

In the second program, as shown in FIG. 7, after the control device 200 stops the conveyance of the old web W1, the pressing rollers 8, 9 are moved upward by the pressing actuators 72, 74, and the old web W1 is The new web W2 is fixed by being sandwiched by the carry-in roller 4, the pressing roller 8, the carry-out roller 5, and the pressing roller 9. In other words, the pressing rollers 8 and 9 that are respectively press-contacted to the carry-in roller 4 and the carry-out roller 5 perform the blocking function by nip, and block the tension fluctuation of the old web W1 and the new web W2 from the upstream, and The tension of the old web W1 from the downstream changes, and the web tension in the connecting device 10 is stabilized. Further, in the initial position, the control device 200 moves the upper and lower members 60 of the lower moving body 14 upward from the standby height by the middle actuator 62, and the control device 200 starts the lower suction portion 54 below the new web fixing portion 44. The suction of the lower rear suction portion 56 attracts the lower surface of the new web W2 by the lower front suction portion 54 and the lower rear suction portion 56.

In the third program, as shown in Fig. 8, the new web W2 is held by the lower suction portion 54 and the lower rear suction portion 56 under the new web fixing portion 44, so that the control device 200 is placed thereon. The old web W1 overlaps with the new web W2 and is held by the old web winding body 18 to be fixed. In this state, since the moving groove portion 28 above the old web winding body 18 is located at the position of the cutter 58, the control device 200 causes the cutting device 46 to cause the cutter 58 along the overlapping old web W1 and The new web W2 moves in the width direction while simultaneously The two pieces of the old web W1 and the new web W2 are cut in the width direction. However, even if it is cut, the old web W1 and the new web W2 are fixed as described above. Further, in the program before the cutter 58 of the cutting device 46 cuts off the old web W1 and the new web W2, the control device 200 opens the suction two-way valve 120-1 to make the dust The dust suction port 104 and the lower dust suction port 106 above the suction unit 102 are connected to the right side of the cut spaces 98 and 99. Next, as shown in FIG. 17, the control device 200 uses the dust suction port 104 above the dust suction unit 102, and the cylindrical cut space 98 (suction space) surrounded by the old web W1 and the upper moving groove portion 28, When the dust generated by the cutting is sucked, the dust suction port 106 is sucked from the cylindrical cutting space 99 (suction space) surrounded by the new web W2 and the lower moving groove portion 96, and the dust generated by the cutting is sucked. . Next, when the cutting is completed, the control device 200 stops the dust suction unit 102.

In the fourth program, as shown in FIG. 9, in a state where the lower moving body 14 is stopped, the control device 200 causes only the upper moving body 12 to move along the upper rails 36, 36 from the initial position toward the loading side by the upper actuator 38. mobile. The old web winding body 18 and the upper tape attaching body 20 are rotated in the counterclockwise direction in FIG. 9 together with the movement of the upper moving body 12. That is, when the upper moving body 12 is moved in the horizontal direction, the pinion 76 is rotated by the rack 78, and the old web winding body 18 is rotated. When the old web winding body 18 is rotated, the upper tape attaching body 20 is also rotated by the belt 84.

In the fifth program, as shown in FIG. 10, the control device 200 starts the suction of the old web suction portion 26 of the old web winding body 18, and the old web winding body 18 rotates in the counterclockwise direction, and is The cut off of the old piece W1 before the end will It is drawn by the old web suction unit 26 and wound up. Thereby, the upper surface of the new web W2 is exposed, and the front end of the new web W2 is joined to the rear end of the cut old web W1, and the subsequent upper strip temporary suction portion 32 is pasted over the strip 34 The joint is rotationally engaged. In other words, the upper surface of the upper tape 34 provided with the temporary suction portion 32 on the upper tape attaching body 20 is pressed by the upper tape attaching body 20 and attached to the cut old blank W1. The end is at the top of the front end of the new web W2. When the control device 200 attaches the upper tape 34, the suction of the upper tape temporary suction portion 32 is stopped. Then, the control device 200 continues to move the upper moving body 12.

In the sixth procedure, as shown in Fig. 11, the old web winding body 18 continues the winding of the front end portion of the old web W1, and the upper tape attaching body 20 is also reversed after the upper tape 34 is attached. The clock rotates in the direction of rotation. Then, the control device 200 attracts the joint portion of the upper end portion of the old web W1 and the upper end portion of the new web W2 after the upper portion W1 of the belt 34 has been attached by the suction surface 23 of the upper engaging portion 22, and the control device 200 stops the movement of the moving body 12. Up to this state, the control device 200 fixes the lower moving body 14, and thereafter, the control device 200 stops only the suction of the new web W2 by the front suction portion 54 under the new web fixing portion 44, and the lower suction portion 56 Continue to attract.

In the seventh program, as shown in FIG. 12, the control device 200 engages the suction portion 22 by the upper moving body 12 that is stopped, and sucks the old web W1 and the new web W2 to which the upper belt 34 is attached. In the state of the joint portion, the control device 200 moves the lower moving body 14 along the rails 68, 68 toward the carry-out side by the lower actuator 70. As a result, the lower attached body 42 of the lower moving body 14 rotates together with the movement of the lower moving body 14 to temporarily stay at the lower belt temporary suction portion 50. The lower belt 52 will reach the joint. When the lower belt 52 reaches the joint portion, the rear end portion of the old web W1 and the lower portion of the front end portion of the new web W2 are joined by the joint surface of the lower belt 52.

In the eighth program, as shown in FIG. 13, the control device 200 keeps the movement of the upper moving body 12 stopped, and moves only the lower moving body 14 toward the carry-out side. At this time, since only the suction of the lower front suction portion 54 is stopped, the movement of the lower moving body 14 is maintained by the new web fixing portion 44 under the rear suction portion 56 (suction is continued) and the end fixing member 66. The cut end of the new web W2 will leave the cut position, and the joint between the old web W1 and the new web W2 will be finished. Then, the lower belt attaching body 42 under the belt temporarily attracting portion 50 is rotated with the lower belt 52 and slid across the lower joint portion of the old web W1 and the lower end portion of the new web W2. Pressing and attaching the lower belt 52 ends the connection. Thereafter, the control device 200 stops the suction of the lower belt temporary suction unit 50.

In the ninth program, as shown in FIG. 14, after the suction of the engagement suction portion 22 on the upper moving body 12 is also stopped, the control device 200 lowers the lower moving body 14 and lowers the pressing rollers 8, 9 (that is, Then, the blocking is released, and the upper and lower members 60 of the lower moving body 14 are moved downward to return to the original standby height. Then, in the process, the control device 200 restarts the transfer of the connected new web W2. Further, in order to shorten the time, the control device 200 moves the upper and lower members 60 downward (disengaged) from the lower movable body 14, and the pressing rollers 8 and 9 perform the nip-opening or the nip-on state to release the blocked state. At the moment, the new material W2 was started to be transferred again. Moreover, due to the contact between the old web W1 and the cut end of the new web, the static electricity is disengaged. In order to prevent the influence, the control device 200 continues the suction of the lower suction portion 56 under the new web fixing portion 44, and the time at which the end portion of the new web W2 which is unnecessary is removed is removed from the tenth program. Released.

In the tenth program, as shown in FIGS. 2 and 15, the control device 200 releases the suction of the old web suction unit 26, and returns the position of the upper moving body 18 to the initial position. By this operation, the front end portion of the old web W1 which has just been attracted by the old web suction portion 26 of the old web winding body 18 is rewinded, and is retracted by the carry-in roller 4 and the guide roller 3. The remaining old web W1 is reversed to the old core 1 and rewinded. Moreover, the control device 200 releases the suction of the new web fixing portion 44, and the operator removes the end portion of the new web W2 which is fixed to the end fixing member 66. Then, the control device 200 returns the position of the lower moving body 14 to the initial position, and the rotational position of the second attached body 42 also returns to the initial position. By the above, the connection between the old web W1 and the new web W2 and the remaining processing of the same web are ended.

(9) suction program of the negative pressure device 150 and the suction device 100

Next, a procedure for attracting the new web W2 by the lower front suction unit 54 among the negative pressure device 150 and the suction device 100 will be described with reference to the explanatory diagram of Fig. 19 and the flowchart of Fig. 21.

In step S1, the control device 200 turns off the inlets of all the three-way valves 120-1 to 120-7, and the first outlet and the second outlet are in an on state.

In step S2, the control device 200 turns all of the two-way valves 118-1 to 118-7 to the on state, and proceeds to step S3.

In step S3, the control device 200 is made by the power cylinder 112. The piston 130 of the negative pressure pump 110 slides to enlarge the first space 132, and the inside of the negative pressure grooves 114-1 to 114-7 is lowered by ΔP. Then proceed to step S4.

In step S4, the control device 200 measures whether the negative pressure tanks 114-1 to 114-7 have become the set negative pressure -P1 by the pressure gauges 122-1 to 122-7, and if all the negative pressure grooves 114-1 to 114 When -7 is lowered to the set negative pressure -P1, the process proceeds to step S5 (in the case of y), and if it is not decreased to the set negative pressure -P1, the process returns to step S3, and the negative pressure pump 114 is again lowered by ΔP ( The case of n). Further, for the negative pressure tank 114 which has fallen to the set negative pressure -P1 among the seven systems, the two-way valve 118 connected to the negative pressure tank 114 is closed.

In step S5, since all of the negative pressure grooves 114-1 to 114-7 are lowered to the set negative pressure -P1, the control device 200 turns off all the two-way valves 118 to stop the negative pressure pump 110. Then, the process proceeds to step S6.

In step S6, the control device 200 causes the suction of all the suction portions to be in the standby state, and proceeds to step S7.

In step S7, in the case of the second program described above, the control device 200 performs an instruction to start the suction of the lower front suction unit 54.

In step S8, the control device 200 sets the inlet of the suction three-way valve 120-6 to the first outlet and the second outlet to the closed state. As a result, the internal pressure of the suction space 55 of the lower front suction portion 54 is lowered to be in a balanced state, and the process proceeds to step S11. The volume of the negative pressure groove 114 is V1, the set pressure is -P1, the volume of the suction space 55 of the lower front suction portion 54 is V2, and the suction pressure is -P2, then V1:V2=|-P1|:|-P2| . In addition, the suction pressure -P2 means: the conduction attracts the three-way valve 120-6 and attracts the lower front. The pressure at the time when the internal pressure of the portion 54 and the negative pressure groove 114-6 is in an equilibrium state. However, the flow resistance factor has been ruled out. The operation of this equation will be described in detail by way of specific examples. In addition, these figures are only examples. When V1 = -80 Kp, the amount of air is 0.2 atm. If the capacity of the negative pressure tank 114-6 is 5 L (liter), 1 L of air (atmosphere) remains. On the other hand, when the volume of the lower front suction portion 54 is 1 L, the atmospheric pressure is set when the suction three-way valve 120-6 is opened, but the suction surface 57 is shielded by the old new webs W1 and W2. When the lower front suction portion 54 and the negative pressure groove 114-6 are electrically connected by the three-way valve 120-6, the internal pressure of the lower front suction portion 54 and the negative pressure groove 114-6 is (1L+1L)/( 5L+1L) = 2/6 air pressure, that is, the balance state is maintained with -P2 = about -67 Kp. Therefore, the set pressure -P1 is determined by the sum of the sum of the amounts of air existing in the lower front suction portion 54 and the negative pressure groove 114-6.

In step S9, since the internal pressure of the suction space 55 of the lower front suction portion 54 is lowered to -P2, the suction of the new web W2 can be performed, and the process proceeds to step S10.

In step S10, if it is the sixth program described above, the control device 200 instructs to end the suction, and proceeds to step S11.

In step S11, the control device 200 sets the inlet of the suction three-way valve 120-7 to the closed state, and turns the first outlet and the second outlet into an on state. Thereby, the internal pressure of the suction space 55 of the lower front suction part 54 rises to atmospheric pressure, and it progresses to step S12.

In step S12, since the internal pressure of the suction space of the lower front suction surface is atmospheric pressure, the suction of the new web W2 is ended, and the process returns to step S2.

Further, regarding the suction portion of the system other than the lower front suction portion 54, The operations of steps S6 to S12 are also performed in parallel with each of the attraction start point and the attraction end point.

(10) effect

According to the cutting device 46 of the present embodiment, the space in which the old web W1 and the new web W2 are overlapped and cut by the cutter 58 is a cylindrical shape surrounded by the old web W1 and the upper moving groove portion 28. The cut space 98, the cylindrical cut space 99 surrounded by the new web W2 and the lower moving groove portion 96, and the dust suction portion 102 are connected to the right side thereof, and the dust generated by the cutting can be sucked. Therefore, dust does not adhere to the surface of the old web W1 and the new web W2.

Further, according to the negative pressure device 150 of the present embodiment, the negative pressure pump 110 can slide the piston 130 a plurality of times by the power cylinder 112 to lower the inside of the negative pressure groove 114 to the set negative pressure -P1, so that the structure can be made relatively Simple and, can reduce costs. In particular, if the set negative pressure -P1 is set to be lower than the atmospheric pressure and higher than the medium vacuum -100 pha, for example, -80 to -60 pha, the pressure in the negative pressure tank 114 can be more easily lowered.

Further, according to the suction device 100 of the present embodiment, the suction three-way valve 120 is operated, and the negative pressure groove 114 is balanced with the internal pressure of the suction space of the suction portion, whereby the dust and the old material W1 can be easily sucked. A new piece W2, an upper belt 34, a lower belt 52 and the like are attracted.

(11) Change example

In the above embodiment, the groove portion 28 is moved over the old web winding body 18 of the upper moving body 12, and the lower moving groove portion 96 of the new web fixing portion 44 of the lower moving body 14 is formed into a cylindrical shape. Although the spaces 98 and 99 are cut, the cut spaces 98 and 99 may be formed by members other than these. The old web W1 and the new web W2 are simultaneously cut by the cutter 58.

Further, in the above embodiment, the suction device 100 of the negative pressure pump 110, the power cylinder 112, the first check valve 108, and the second check valve 116 lowers the inside of the negative pressure groove 114 to a negative pressure. However, the present invention is not limited thereto, and the other negative pressure space portions may be made to have a negative pressure.

Further, in the above-described embodiment, when the first space 132 of the negative pressure pump 110 is enlarged by the piston 130, the inside of the negative pressure groove 114 is made a negative pressure. However, the present invention is not limited thereto, and when the second space 134 is enlarged, Alternatively, when the first space 132 and the second space 134 are alternately expanded, the inside of the negative pressure groove 114 is made to have a negative pressure.

Further, in the above-described embodiment, the suction device 100 is used in the connection device 10 in which the upper movable body 12 and the lower movable body 14 are used. However, the suction device 100 of the present embodiment may be applied to have a conventional attraction. Constructed connection device.

Further, in the above embodiment, the piston 130 of the negative pressure pump 110 is slid by the power cylinder 112. However, the piston 130 may be slid by means other than the power cylinder 112.

Further, in the above embodiment, the inside of one negative pressure groove 114 is lowered to the set negative pressure -P1. However, when the suction portion requires a larger suction force, the auxiliary groove can be connected to the negative pressure groove 114, and The volume V3 of the auxiliary tank is added to the volume V1 of the negative pressure tank 114. Then, the negative pressure pump 110 can obtain a greater attractive force by lowering the inside of the negative pressure groove 114 and the auxiliary groove to the set negative pressure -P1.

Further, in the above embodiment, the negative pressure grooves 114-1 to 114-7 of the seven systems are all connected in parallel by the first connecting pipe 124, but they may be connected in parallel. The suction system of the seven systems is formed, for example, by a first parallel system including suction portions of four systems that require high attractiveness, and a suction system composed of three systems that are less attractive. In the parallel system, the first parallel system and the second parallel system are connected in parallel to form a main parallel line, and the first parallel pipe and the one negative pressure pump 110 formed as described above are connected by the first connecting pipe 124.

Although an embodiment of the present invention has been described above, this embodiment is an example and is not intended to limit the scope of the invention. The present invention may be embodied in various other forms without departing from the spirit and scope of the invention. The invention and its modifications are intended to be included within the scope of the invention and the scope of the invention as described in the appended claims.

22‧‧‧Upper joint attraction

26‧‧‧Old material attraction

32‧‧‧With temporary attraction

50‧‧‧With temporary attraction

54‧‧‧The former attraction department

56‧‧‧After the attraction department

100‧‧‧ attracting device

102‧‧‧Dust attraction

108‧‧‧1st check valve

110‧‧‧Negative pressure pump

112‧‧‧Power cylinder

114-1~114-7‧‧‧ Negative pressure tank

118-1~118-7‧‧‧Double-way valve

116‧‧‧2nd check valve

120-1‧‧‧Attracting two-way valve

120-2~120-7‧‧‧Attracting three-way valve

122-1~122-7‧‧‧ pressure gauge

123‧‧‧Main connecting pipe

124‧‧‧1st connecting pipe

126-1~126-7‧‧‧2nd connection tube

128‧‧‧ casing cylinder

130‧‧‧Piston

132‧‧‧1st space

134‧‧‧2nd space

150‧‧‧Negative pressure device

Claims (8)

A suction device comprising: a suction portion for attracting a suction body; a negative pressure groove; a negative pressure pump; a first connection pipe connecting the negative pressure pump and the negative pressure groove; and a connection between the suction portion and the negative pressure groove a second connecting pipe; a two-way valve provided in the middle of the first connecting pipe; a suction three-way valve provided in the middle of the second connecting pipe, the inlet being connected to the negative pressure groove, the first outlet and the suction portion The second outlet is open to the outside; and the control unit executes the following procedure: (1) The first program is such that the two-way valve is in an open state and the inlet of the three-way valve is closed. The negative pressure pump lowers the inside of the negative pressure tank to a set negative pressure -P1 lower than atmospheric pressure; (2) the second routine causes the two-way valve to be in a closed state; and (3) the third program causes the aforementioned three-way suction The inlet of the valve and the first outlet are in an on state, and the second outlet is in a closed state, and the inside of the suction portion is lowered to a negative pressure -P2 (where -P1 < - P2 < atmospheric pressure) to attract the suction body. The suction device according to claim 1, wherein the control means executes the fourth program: the inlet of the suction three-way valve is in a closed state, and the first outlet and the second outlet are in an on state, and the suction of the suction portion is ended. The suction device of claim 1, wherein the suction pump has one of the negative pressure pumps, and the suction portion has n (n=1) of the first to nth suction portions, and the number of the two-way valves is n. The negative pressure tank has n first negative pressure tanks to nth negative pressure tanks, and n of the second connection pipes, one end of the first connection pipe is connected to the negative pressure pump, and the other end is branched into n pieces. Each of the n two-way valves is connected to one of the n-way valves, and the other ends of the n-way two-way valves are respectively connected to the respective negative pressure grooves, and each of the second connecting pipes is connected to each of the suction portions and the aforementioned Each negative pressure groove. The suction device of claim 1, wherein when the volume of the negative pressure groove is V1 and the volume of the suction portion is V2, V1: V2 = |P1|: |P2|. The suction device of claim 1, wherein the auxiliary tank is connected to the aforementioned negative pressure tank. A connecting device for a web is a connecting device for connecting a piece of old material which is conveyed along a conveying path and a new web using the suction device of claim 3, wherein the connecting device of the web has: The moving body is freely movable along the upper side of the transport path of the old web and the new web; the lower moving body is fixed with the front end of the new web, and is freely movable along the lower side of the transport path; The new web fixing portion is provided in the lower moving body, and the first suction portion having the suction device sucks the new web that has stopped the conveyance by the first suction portion to fix the old web; And the upper movable body is fixed to the new web fixing portion by sandwiching the new material piece and the old material piece; and the cutter is disposed on the lower moving body, and the old material piece is used The old web and the new web fixed to the winding body and the new web fixing portion are moved in the width direction to be cut, and the suction device is formed in the old web winding body. In the second suction portion, when the upper movable body moves in the opposite direction to the conveyance direction after the cutting of the old web, the old web winding body is rotated while being sucked by the second suction portion to wind the old sample. The connecting device of the web of claim 6, wherein the upper movable body further has a tape temporary suction portion, the upper tape temporary suction portion has a third suction portion of the suction device, and the upper tape temporary suction portion The third suction portion attracts the non-adhesion surface of the upper tape, and the non-adhesion surface of the upper tape is attached to the upper surface of the joint portion between the old web and the new web. The connecting device of the web of claim 6, wherein the lower moving body further has a lower belt temporary suction portion, the lower belt temporary suction portion includes a fifth suction portion of the suction device, and the lower belt temporary suction portion is 4 The suction portion attracts the non-adhesive surface of the lower tape, and the non-adhesive surface of the lower tape is attached to the lower surface of the joint portion between the old web and the new web.