JP2015199560A - Vacuum carrier belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum carrier belt which is excellent in suction efficiency by minimizing air suction from a portion other than suction holes.SOLUTION: A vacuum carrier belt 1 comprises: a belt body 2 arranged between both inner wall surfaces 202 of a housing 200; a plurality of core wires 3 embedded inside the belt body 2 along a longitudinal direction; a recessed nose 4 formed on an opposite surface from a conveyance surface 21 of a conveyed object A in the belt body 2 along a width direction when embedding the core wires 3 to a certain depth of the inside of the belt body 2; and suction holes 5 formed at predetermined intervals in a longitudinal direction of the belt body 2. Rib parts 6 for cutting off an air channel S between the belt body 2 and both inner side wall surfaces 202 of the housing 200 by being displaced so as to be in contact with both inner wall surfaces 202 of the housing 200 by negative pressure generated inside the housing 200 during air suction are provided at both side parts of the belt body 2 in the longitudinal direction respectively.

Description

  The present invention relates to a vacuum conveyance belt, and more particularly, to a vacuum conveyance belt capable of sucking and conveying an object to be conveyed onto the surface of a belt body using intake air.

  As a transport belt for transporting an object to be transported, a vacuum transport belt is known that sucks air through a suction hole provided in a belt body and sucks the object to be transported on the belt surface (Patent Document 1). According to the vacuum conveyor belt, the object to be conveyed can be reliably held on the belt surface, so that the object to be conveyed can be reliably conveyed not only when the belt is horizontal but also when the belt is vertical. Have

  An example of a belt conveying apparatus provided with a conventional vacuum conveying belt is shown in FIG. 7A and 7B are cross-sectional views of the belt conveyance device, where FIG. 7A is a cross-sectional view cut in the width direction of the conveyance belt, and FIG. 7B is a cross-sectional view taken along line (b)-(b) of FIG. .

  The vacuum conveying belt 100 is substantially at the center in the width direction of the belt main body 101, and suction holes 102 are formed at predetermined intervals in the longitudinal direction of the belt main body 101. On the other hand, a suction chamber 201 is provided in the housing 200 that supports the vacuum conveyance belt 100. When the vacuum conveyance belt 100 is used, when the suction hole 102 comes above the suction chamber 201, air is sucked from the suction hole 102. The belt main body 101 comes into close contact with the upper surface of the suction chamber 201 by this air suction. Then, air is sucked from the suction holes 102, a negative pressure is applied to the contact surface with the conveyed object A on the belt main body 101, and the conveyed object A is sucked and held by the belt main body 101. In this state, the transported object A is transported as the vacuum transport belt 100 moves.

  By the way, when tension reinforcement is required in the conveyor belt, a plurality of core wires extending along the longitudinal direction are embedded in the belt body. FIG. 7 shows an example of a vacuum conveying belt reinforced by tension with the core wire 103.

  The core wire 103 for reinforcing the tension needs to be embedded at an accurate position in the belt main body 101. For this reason, when manufacturing the belt main body 101 with a mold, a protrusion that protrudes at a predetermined height along the width direction of the belt main body 101 is provided on the mold, and the core wire 103 is supported by the upper end of the protrusion, and then the belt The mold is filled with an elastic material forming the main body 101. Thereby, a concave nose 104 (core wire pressing groove) is formed on the opposite side of the belt main body 101 from the conveyance surface of the object to be conveyed, by transferring the projection of the mold. In addition, the code | symbol 105 in a figure is the tooth | gear part protruded by the surface opposite to the conveyance surface of the to-be-conveyed object A in the belt main body 101. As shown in FIG.

Table 2011/040178

  As shown in FIG. 7A, the nose 104 is generally formed so as to extend along the width direction of the belt main body 101 and is formed up to the side surface of the belt main body 101. Therefore, an air flow path is formed in the nose 104 between the belt body 101 and the upper surface of the suction chamber 201. At the time of suction, as shown by an arrow in FIG. 7A, the air stands not only from the suction hole 102 but also the flow path formed by the nose 104 and the vacuum conveyance belt 100 from both sides. External air was to be sucked through the space between the inner wall surfaces 202 and 202 of the housing 200 provided. Accordingly, the suction force from the suction hole 102 is reduced, and the suction efficiency is very poor, such as a large suction force is required to hold the transported object A reliably.

  In order to deal with such a problem of suction efficiency, in Patent Document 1, two airtight liners that contact both side edges of the belt main body opposite to the transport surface of the transported object are provided in the housing, and the belt is used during suction. It is comprised so that the both-sides edge part of a main body may contact an airtight liner. As a result, the air during suction is prevented from escaping from between the side edges of the belt body and the housing.

  However, even if an airtight liner is provided in the housing and brought into contact with the belt body, the flow path formed by the nose cannot be blocked, so a fundamental solution to the problem of sucking air through the nose is not possible. Don't be.

  Moreover, since an airtight liner is provided in the housing, there is a problem that it cannot be easily applied to an existing belt conveyance device. In addition, it is necessary to change the belt shape in accordance with the position and shape of the airtight liner, and there is a problem that a dedicated belt must be used in accordance with the belt conveyance device with the airtight liner.

  Therefore, the present inventor made the present invention as a result of diligent research to make it possible to improve suction efficiency only on the conveying belt side without requiring any change on the housing side.

  That is, an object of the present invention is to provide a vacuum conveyance belt having a high suction efficiency by minimizing the suction of air from portions other than the suction holes.

  Other problems of the present invention will become apparent from the following description.

1. A belt body disposed between both inner wall surfaces of the housing;
Inside the belt body, a plurality of core wires embedded along the longitudinal direction,
A concave nose formed along the width direction when the core wire is embedded at a certain depth inside the belt main body on the surface opposite to the conveying surface of the object to be conveyed in the belt main body,
A suction hole drilled at predetermined intervals in the longitudinal direction of the belt body,
In the vacuum conveyance belt that sucks air through the suction hole in the housing and sucks and conveys the object to be conveyed to the belt body.
The belt main body and the inner wall surfaces of the housing are displaced on both sides in the longitudinal direction of the belt main body so as to come into contact with both inner wall surfaces of the housing by negative pressure generated in the housing when air is sucked. A vacuum conveying belt comprising rib portions for blocking air flow paths between the two.

  2. The belt body has grooves along the longitudinal direction of the belt body on both sides in the longitudinal direction on the transport surface of the object to be transported, and the rib portion is formed by a portion outside the groove. 2. The vacuum conveying belt as described in 1 above.

  3. On the outer surface of the rib portion, a protruding strip portion is formed along the longitudinal direction of the belt body that protrudes toward the inner wall surface of the housing to minimize the distance from the inner wall surface of the housing. 3. The vacuum conveying belt as described in 2 above.

  4). 4. The vacuum conveyance belt according to claim 1, wherein the rib portion is formed integrally with the belt main body.

  5. 4. The vacuum conveyance belt according to 1, 2, or 3, wherein the rib portion is formed separately from the belt main body, and is provided on the belt main body by heat welding or adhesion.

  6). The vacuum conveyor belt according to any one of the above items 1 to 5, wherein the belt body is a toothed belt having a plurality of teeth protruding from a surface opposite to a conveyance surface of an object to be conveyed.

  According to the present invention, it is possible to provide a vacuum conveying belt having a high suction efficiency by minimizing the suction of air from portions other than the suction holes.

1 is a partially cutaway sectional perspective view showing a usage state of a vacuum conveying belt according to the present invention. The top view of the vacuum conveyance belt which concerns on the 1st Embodiment of this invention Sectional view along line (iii)-(iii) in FIG. 1 is a partially cutaway exploded perspective view showing a usage state of a vacuum conveyor belt according to the present invention. (A)-(d) is sectional drawing which shows the other aspect of the protruding item | line part formed in the rib part. (A) (b) is sectional drawing which shows the other aspect of a rib part. It is sectional drawing of the belt conveying apparatus using the conventional vacuum conveying belt, (a) is sectional drawing cut | disconnected in the width direction of a belt main body, (b) is the (b)-(b) line | wire in (a). Cross section along

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 4 show an example of a belt conveying device using a vacuum conveying belt according to the present invention, FIG. 1 is a partially cutaway sectional perspective view showing a use state, FIG. 2 is a plan view, and FIG. 2 is a cross-sectional view taken along line (iii)-(iii) in FIG. 2, and FIG. 4 is a partially cutaway exploded perspective view showing a use state.

  In the figure, 1 is a vacuum conveyance belt, and 200 is a housing of the belt conveyance device.

  The vacuum conveying belt 1 includes a belt main body 2 disposed between both inner wall surfaces 202 of the housing 200, a plurality of core wires 3 embedded in the belt main body 2 along the longitudinal direction, and a covering of the belt main body 2. A concave nose 4 formed along the width direction when the core wire 3 is embedded at a certain depth inside the belt body 2 on the surface opposite to the conveyance surface 21 of the conveyed product A, and the length of the belt body 2 And the suction holes 5 perforated at predetermined intervals in the direction, and the housing 200 is in contact with both inner wall surfaces 202 of the housing 200 or on both sides in the longitudinal direction of the belt body 2 adjacent to the housing 200 during air suction. It has the rib part 6 displaced so that it can contact | abut to both the inner wall surfaces 202 of this housing 200 with the negative pressure which generate | occur | produces in an inside.

  The housing 200 has a suction chamber 201 that performs air suction over a predetermined length in the moving direction of the vacuum conveyance belt 1. The vacuum conveyance belt 1 is arranged above the suction chamber 201 so that the back surface of the belt body 2 (the surface opposite to the conveyance surface 21 of the object A) is facing. In the housing 200, inner wall surfaces 202 are raised so as to sandwich the vacuum conveyance belt 1 disposed on the suction chamber 201.

  The vacuum conveying belt 1 is disposed between both inner wall surfaces 202 of the housing 200 and moves along the inner wall surface 202. Both side surfaces in the longitudinal direction of the belt main body 2 are arranged so as to contact or be close to the inner wall surface 202 of the housing 200. The belt body 2 is formed of an elastic material that is generally used as a material for this type of belt. As the elastic material, a soft elastic material such as polyurethane is preferably used.

  A plurality of core wires 3 embedded along the longitudinal direction inside the belt main body 2 are arranged in parallel with each other so as to avoid the portion where the suction holes 5 are formed, and are formed in a mold (not shown) when the belt is manufactured. By being supported by the tip of the protrusion, the belt body 2 is buried at a certain depth. Then, by transferring the protrusions of the mold, a nose 4 is formed on the back surface of the belt body 2 so as to extend in a concave shape in the width direction of the belt body 2. The end of the nose 4 is open to the side of the belt body 2. In addition, the core wire 3 becomes a structure exposed only in the site | part which cross | intersects this nose 4. FIG.

  Although a single wire can be used for the core wire 3, it is preferable to use a fiber-based core wire in which a large number of fibers are bundled. As the fibers, metal fibers such as steel and stainless steel, and chemical fibers such as aramid fibers, glass fibers, carbon fibers, and polyester fibers can be used.

  As in the conventional example, the suction hole 5 is formed at a substantially central position in the width direction of the belt body 2 and at predetermined intervals in the longitudinal direction of the belt body 2. For this reason, when the belt body 2 comes above the suction chamber 201 of the housing 200, air is sucked through the suction holes 5. As a result, the conveyed object A is attracted to the conveying surface 21 of the belt body 2.

  Here, as the vacuum conveyance belt 1, the belt main body 2 exemplifies a toothed belt having a plurality of tooth portions 7 protruding from the surface opposite to the conveyance surface 21 of the object A to be conveyed. The tooth portions 7 are formed in two rows avoiding the arrangement site of the suction holes 5 drilled in the center of the belt body 2. The nose 4 is disposed between the tooth portions 7, 7 arranged along the longitudinal direction of the belt body 2.

  On the other hand, the suction chamber 201 of the housing 200 is formed so as to rise at a predetermined height from the bottom surface 203 of the housing 200 so that the upper end surface 201a abuts on the back surface of the belt body 2. For this reason, between the suction chamber 201 and the inner wall surface 202 is a recess 204 that accommodates two rows of tooth portions 7.

  The vacuum conveyor belt 1 has grooves 61 along the longitudinal direction of the belt body 2 at both sides in the longitudinal direction on the conveyor surface 21 of the belt body 2 so as to be concave at a predetermined depth from the conveyor surface 21 of the belt body 2. Each is formed. Each groove 61 is disposed slightly inside the longitudinal ends of both sides of the belt body 2.

  And the rib part 6 shown to this embodiment is formed of the site | part of the belt main body 2 outside this groove | channel 61. FIG. That is, the rib portion 6 is made of the same material as that of the belt body 2 and is formed at the same time as the belt body 2 is formed. Since the portion of the rib portion 6 that is integrally connected to the belt body 2 at the bottom of the groove 61 is thin, the rib portion 6 is easily tilted and displaced in the direction in which the groove 61 opens and expands in the width direction. It is possible.

  3 is a U-shaped groove having a substantially U-shaped cross section, the cross-sectional shape of the groove 61 is not particularly limited. That is, the cross-sectional shape of the groove 61 is arbitrary as long as the rib portion 6 outside the groove 61 can be easily tilted and displaced.

  The full width dimension of the vacuum conveying belt 1 including the rib portion 6 is set so that both are lightly in contact with or close to each other with respect to the gap S with the inner wall surface 202 of the housing 200. That is, the total width dimension of the vacuum conveyance belt 1 including the rib portion 6 is the same as the distance between the inner wall surfaces 202 and 202 of the housing 200, or the total width dimension of the vacuum conveyance belt 1 is set to be a slightly smaller distance. Yes. For this reason, the gap S between the rib portion 6 serving as a flow path of air sucked through the nose 4 and the inner wall surface 202 of the housing 200 can be made as small as possible. Further, since the rib portion 6 strikes the inner wall surface 202 of the housing 200 more than necessary, it can be prevented from being consumed due to wear or the like.

  Next, operations and effects of the vacuum conveyance belt 1 will be described.

  When the vacuum conveying belt 1 moves and the suction hole 5 comes above the suction chamber 201 of the housing 200, air is sucked through the suction hole 5, and the object A to be transported placed on the transport surface 21 is removed. Adsorb to the conveyance surface 21. At this time, the suction pressure by the suction chamber 201 simultaneously acts on the nose 4, and air is also sucked through the nose 4.

  The air sucked from the nose 4 sucks outside air from the gap S between the rib portion 6 and the inner wall surface 202 of the housing 200 through the recess 204 of the housing 200 between the tooth portions 7 and 7. Since the gap S is extremely narrow compared to the recess 204, the flow velocity of the sucked air is increased in the gap S, and a negative pressure acts on the gap S. Due to this negative pressure, the vacuum conveying belt 1 is tilted from the state shown by the broken line in FIG. 3 in the direction in which the groove 61 opens and the rib portion 6 spreads in the width direction as shown by the solid line, and the inner wall surface 202 of the housing 200 It is displaced so as to come into contact with. As a result, the gap S, which is an air flow path, is blocked.

  Therefore, according to the vacuum conveyance belt 1, the suction of air from the portion other than the suction hole 5 can be reduced as much as possible, and the suction efficiency can be improved. For this reason, useless output of suction means such as a vacuum pump can be suppressed, and energy saving can be achieved. In addition, since it is not necessary to make any changes on the housing 200 side, it can be easily applied to an existing belt conveying device.

  Further, since the rib portion 6 is displaced by generating a negative pressure in the gap S during suction, air is sucked from the gap S through the nose 4 when moving in a region other than the region where suction is performed by the suction chamber 201. Never do. For this reason, the rib portion 6 acts in a direction away from the inner wall surface 202 of the housing 200 by an elastic restoring force. Therefore, the rib portion 6 is completely separated from the inner wall surface 202 or comes into light contact, and does not come into strong contact. Accordingly, there is no need to worry about wear of the rib portion 6 or the like, and there is no great resistance when the vacuum conveying belt 1 is moved.

  Further, since the rib portion 6 is configured to be easily tilted and displaced by the groove 61, even if the vacuum conveying belt 1 strongly contacts the inner wall surface 202 of the housing 200 due to the occurrence of belt meandering, Since the rib portion 6 can be easily tilted and displaced so that the groove 61 is closed, the impact at the time of contact can be reduced. For this reason, in this case as well, there is no concern about the wear of the rib portion 6, and there is no great resistance when the vacuum conveying belt 1 is moved.

  The outer surface 62 of the rib portion 6, that is, the end surface in the width direction of the belt body 2 including the rib portion 6 can be formed as a flat surface if the gap S with the inner wall surface 202 of the housing 200 can be made as small as possible. . However, like the rib portion 6 shown in FIG. 3, the protruding portion that minimizes the distance from the inner wall surface 202 of the housing 200 by protruding toward the inner wall surface 202 of the housing 200 on the outer surface 62 thereof. 63 is preferably formed along the longitudinal direction of the belt body 2.

  As a result, the gap S between the rib portion 6 and the inner wall surface 202 of the housing 200 can be further narrowed at the portion of the ridge portion 63, so that the displacement of the rib portion 6 due to negative pressure is made more reliable. And the effect of blocking the gap S can be further enhanced. Further, since the contact between the rib portion 6 and the inner wall surface 202 of the housing 200 becomes the line contact or close to the line contact by the protruding strip portion 63, the concern such as wear of the rib portion 6 can be further reduced, and the vacuum conveyance is performed. The resistance when the belt 1 is moved can be further reduced.

  The ridge portion 63 shown in FIG. 3 is formed in a chevron shape in which the entire outer surface 62 of the rib portion 6 is gently inclined so that the ridge portion 63 protrudes most laterally. Is not particularly limited. For example, as shown in FIG. 5 (a), a protruding strip portion 63 partially protruding in a semispherical cross section on the outer surface 62 of the rib portion 6 or an outer portion of the rib portion 6 as shown in FIG. 5 (b). A protruding strip portion 63 that partially protrudes in a triangular cross section on the side surface 62, and a protruding strip portion 62 that discharges partially in a rectangular cross section on the outer surface 62 of the rib portion 6 as shown in FIG. You can also Further, as shown in FIG. 5D, the entire outer surface 62 is formed in a tapered shape that is inclined in one direction by forming the protruding strip portion 63 that protrudes most laterally on the conveying surface 21 side of the belt main body 2. May be.

  In addition, the number of the ridges 63 is not limited to one provided on one rib portion 6, but a plurality of ridges 63 may be provided as necessary, although not shown. In this case, the plurality of ridges 63 may have different shapes. Moreover, you may make it also make the protrusion height to the side of the protruding item | line part 63 differ in the some protruding item | line part 63 as needed.

  FIG. 6 shows another aspect of the rib portion 6. These show examples in which the rib portion 6 is formed in the belt body 2 without forming the groove 61.

  The rib portion 6 shown in FIG. 6A has a rib portion 6 having a tongue-like cross-sectional shape extending in a longitudinal direction from the side surface 22 of the belt body 2 in the longitudinal direction of the belt body 2. It was formed along. The rib portion 6 is also formed integrally with the belt body 2 at the same time when the belt body 2 is formed by the same material.

  When a negative pressure is generated in the gap S, the rib portion 6 also acts in the same manner as described above, and is tilted and displaced toward the inner wall surface 202 of the housing 200, thereby blocking the gap S serving as an air inflow path. Therefore, the same effect as described above is obtained. In addition, the rib portion 6 can react more sensitively to the negative pressure generated in the gap S.

  The rib portion 6 shown in FIG. 6B is obtained by extending the conveying surface 21 of the belt main body 2 so as to cover the upper end surface 205 of the housing 200 along the longitudinal direction of the belt main body 2. The rib portion 6 is also formed integrally with the belt body 2 at the same time when the belt body 2 is formed by the same material.

  In the rib portion 6, when a negative pressure is generated in the gap S, the rib portion 6 is displaced so as to be in close contact with the upper end surface 205 of the housing 200, thereby blocking the gap S serving as an air inflow path. Therefore, the same effect as described above is obtained.

  In the above description, an example in which the rib portion 6 is integrally formed at the same time as the belt main body 2 is formed is shown. According to this, since the rib part 6 can be formed simultaneously with the shaping | molding of the belt main body 2, there exists an advantage which manufacture of a belt becomes easy. However, the present invention is not limited to this. For example, the rib portion 6 formed separately from the belt body 2 may be integrally provided on the both end surfaces of the belt body 2 by heat welding or bonding with an adhesive after the belt body 2 is molded. Good.

  In this case, the rib portion 6 can be made of a material different from the material of the belt body 2. In other words, when the material of the belt body 2 is a material that is relatively difficult to cause displacement, a material that is softer and more flexible than the material of the belt body 2 is used as the material of the rib portion 6. The rib portion 6 can be reliably displaced by the pressure, and the effect of blocking the gap S can be enhanced.

  In the above description, the vacuum conveyance belt 1 which is a toothed belt having the tooth portion 7 is illustrated, but the vacuum conveyance belt according to the present invention is not limited to the toothed belt, and may be applied to a flat belt.

1: Vacuum conveyance belt 2: Belt body 21: Conveying surface 22: Side surface 3: Core wire 4: Nose 5: Suction hole 6: Rib portion 61: Groove 62: Outer surface 63: Projection portion 7: Tooth portion 200: Housing 201 : Suction chamber 201a: Upper end surface 202: Inner wall surface 203: Bottom surface 204: Concave portion 205: Upper end surface A: Conveyed object

Claims (6)

A belt body disposed between both inner wall surfaces of the housing;
Inside the belt body, a plurality of core wires embedded along the longitudinal direction,
A concave nose formed along the width direction when the core wire is embedded at a certain depth inside the belt main body on the surface opposite to the conveying surface of the object to be conveyed in the belt main body,
A suction hole drilled at predetermined intervals in the longitudinal direction of the belt body,
In the vacuum conveyance belt that sucks air through the suction hole in the housing and sucks and conveys the object to be conveyed to the belt body.
The belt main body and the inner wall surfaces of the housing are displaced on both sides in the longitudinal direction of the belt main body so as to come into contact with both inner wall surfaces of the housing by negative pressure generated in the housing when air is sucked. A vacuum conveying belt comprising rib portions for blocking air flow paths between the two.   The belt body has grooves along the longitudinal direction of the belt body on both sides in the longitudinal direction on the transport surface of the object to be transported, and the rib portion is formed by a portion outside the groove. The vacuum conveyance belt according to claim 1, wherein:   On the outer surface of the rib portion, a protruding strip portion is formed along the longitudinal direction of the belt body that protrudes toward the inner wall surface of the housing to minimize the distance from the inner wall surface of the housing. The vacuum conveying belt according to claim 2.   The vacuum conveyance belt according to claim 1, wherein the rib portion is formed integrally with the belt main body.   4. The vacuum conveying belt according to claim 1, wherein the rib portion is formed separately from the belt body, and is provided on the belt body by heat welding or adhesion.   The vacuum conveyor belt according to any one of claims 1 to 5, wherein the belt body is a toothed belt having a plurality of teeth protruding from a surface opposite to a conveyance surface of an object to be conveyed.

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