JP6635777B2 - Method of manufacturing suction conveyance belt and suction conveyance belt - Google Patents

Description

  The present invention relates to a method of manufacturing a suction conveyance belt and a suction conveyance belt, and more particularly, to manufacturing a toothed suction conveyance belt having a core wire, it is not necessary to newly create a dedicated molding die, and the belt portion is not required. The present invention relates to a method of manufacturing a suction and conveyance belt capable of cutting an engagement groove having a flat bottom surface without a core wire holding groove without making the thickness of the suction and conveyance belt uneven, and a suction and conveyance belt thereof.

  2. Description of the Related Art Conventionally, a suction conveyance device that suctions and conveys an object to be conveyed on a conveyance belt by suctioning air (air) is known. The suction conveyance belt used in such a device is provided with a large number of air suction ports penetrating on the front and back sides to adsorb the conveyed object by air, and is generally toothed to improve the engagement with the pulley. A belt is used (Patent Documents 1 and 2).

  By the way, in a suction conveyance device using a suction conveyance belt, an air chamber for performing air suction is disposed on the tooth surface side, and air suction is performed from each air suction port while the suction conveyance belt moves on the air chamber. Thus, the object to be transported is adsorbed. As shown in FIG. 12, there is an example of such a suction conveyance device in which a suction portion 201 of an air chamber 200 is formed to protrude stepwise along a length direction.

  As shown in FIG. 13, in the suction conveyance belt 600 used in such a suction conveyance device, the teeth 602 protruding from one surface of the belt portion 601 correspond to the protrusion width of the suction portion 201 of the air chamber 200. In addition, by being cut along the length direction, it has an engagement groove portion 603 for engaging with the suction portion 201 along the belt length direction. The air suction port 604 is opened in the engagement groove 603. When the suction conveyance belt 600 is mounted on the suction conveyance device, the suction unit 201 of the air chamber 200 is engaged with the engagement groove 603, and air is suctioned from the air suction port 604, so that the conveyed object is removed. It is designed to carry by suction.

JP-A-2-60744 JP-A-2005-96442 JP-A-2005-96442

  In general, a transport belt may have a plurality of cores provided in a belt portion in order to improve belt strength. However, it is necessary to avoid the positions of the cores when forming an air suction port. For example, in the suction conveyance belt described in Patent Literature 1, a core wire is not arranged in a region where an air suction port is formed, so that the core wire is not cut when the air suction port is formed.

  The present inventor has studied the conventional toothed suction conveyance belt having an engagement groove portion that engages with the suction portion of the air chamber, and has found the following new problem.

  As shown in FIG. 11 (a), a molding die for molding a conveyor belt has a projection for positioning a core wire at a predetermined position on a tip end surface of a protrusion 401 for molding a tooth portion. A molding die 400 provided with a portion 402 and a molding die 500 having no such protrusion on the tip end surface of a protrusion 501 for forming a tooth portion as shown in FIG. is there. In the case of the suction conveyance belt 600 having a core wire inside, the molding die 400 having the protrusion 402 is used.

  The suction conveyance belt 600 shown in FIG. 13 has a core wire 607 embedded therein by being molded using a molding die 400. In such a suction conveyance belt 600, a core wire holding groove 608 is formed in the tooth bottom surface 605 between the adjacent tooth portions 602, 602 in the belt width direction. The core pressing groove 608 is formed by transferring the protrusion 402 of the molding die 400 and is always formed when a belt having the core 607 therein is formed. Since the core wire holding groove 608 has a depth reaching the core wire 607, the core wire holding groove 608 cannot be completely cut off when the engagement groove portion 603 is cut. This is because the core wire 607 is exposed along the engagement groove 603. As a result, the bottom surface of the engagement groove portion 603 does not have a flat surface with the core wire pressing groove 608 remaining, as shown in FIG. Power drops.

  On the other hand, according to the suction conveyance belt described in Patent Literature 1, since the core line is not provided in the area where the air suction port is formed, when cutting the engagement groove portion as described above, the core line pressing groove is completely cut off. By cutting to the depth, the bottom surface of the engagement groove can be made flat. However, when cutting is performed to the depth that completely cuts the core wire holding groove, when the belt portion is viewed in the width direction, the thickness of the belt portion in the area where the engagement groove portion is formed is thinner by the amount of cutting the core wire holding groove. turn into. For this reason, there is a concern that the thickness of the belt portion becomes non-uniform and the strength is reduced, and in fact, at present, it is necessary to cut the engagement groove portion so that the core wire holding groove remains. As a result, the problem of sucking air from the core wire holding groove cannot be solved.

  In addition, when forming the suction conveyance belt, it is only necessary to form an engagement groove portion that becomes a flat bottom surface without a core wire holding groove from the beginning, but in this case, it is necessary to manufacture a dedicated new molding die. is there. With this method, initial costs are incurred, and especially in small lot production. For this reason, it is desired to be able to manufacture a suction conveyance belt having an engagement groove portion having a flat bottom surface without a core wire holding groove without having to newly manufacture a dedicated molding die.

  Therefore, an object of the present invention is to provide a toothed suction / conveying belt having a core wire without the necessity of newly manufacturing a dedicated molding die and making the thickness of the belt portion in the belt width direction uneven. An object of the present invention is to provide a method of manufacturing a suction conveyance belt capable of cutting an engagement groove portion having a flat bottom surface without a core wire holding groove without forming a groove.

  Another object of the present invention is to provide a toothed suction having a core wire provided with an engagement groove having a flat bottom surface without a core wire holding groove without uneven thickness of a belt portion in a belt width direction. It is to provide a conveyor belt.

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

1. A method for manufacturing a toothed suction / conveying belt having an engagement groove portion along a belt length direction engaging with a suction portion of an air chamber, an air suction port opened in the engagement groove portion, and a core wire provided in the belt portion. And
A step of preparing two or more toothed belts having a core wire inside;
After setting the prepared two or more toothed belts at intervals in the belt width direction and setting them in a toothed belt forming die having no projection for positioning a core wire, a resin material is stretched over the adjacent toothed belts. By pouring, a step of integrally forming a toothed connecting portion having no core wire,
By cutting the tooth portion of the connection portion from the tooth surface side of the formed connection portion, the engagement groove portion in which the connection portion between the adjacent toothed belts is a flat surface is formed. Process and
Forming an air suction port in the connecting portion before or after the formation of the engagement groove portion.
2. In the step of integrally forming the connecting portion, the connecting portion is integrally formed from a side surface of the belt portion facing the adjacent toothed belt to a back surface of each belt portion of the toothed belt. 2. The method for producing a suction conveyance belt according to the above item 1.
3. 3. The method according to claim 1, wherein, in the step of integrally forming the connecting portion, the connecting portion is formed of the same resin material as the toothed belt.
4. A toothed suction conveyance belt having an engagement groove portion along a belt length direction engaged with a suction portion of an air chamber, an air suction port opened in the engagement groove portion, and a core wire provided in the belt portion. ,
A toothed belt including two or more toothed belts having a core wire therein is arranged in parallel at intervals in the width direction of the belt, and the adjacent toothed belts are integrally connected by a resin connection portion having no core wire. Has been
The coupling portion forms the engagement groove portion by being formed on a flat surface having the same height as the tooth surface of the toothed belt and the same height as the tooth bottom surface of the adjacent toothed belt,
An air suction port, wherein an air suction port is formed in the connecting portion formed on the flat surface.
5. The connecting part is formed integrally from a side surface of each of the belt portions of the adjacent toothed belts facing each other to a back surface of each of the belt portions of the toothed belt. The suction conveyance belt according to the above.
6. 6. The suction and conveyance belt according to the item 4 or 5, wherein the connecting portion is formed of the same resin material as the toothed belt.

  ADVANTAGE OF THE INVENTION According to this invention, when manufacturing the toothed suction conveyance belt which has a core wire, it is not necessary to newly manufacture a special molding die, and the thickness of the belt portion in the belt width direction becomes uneven. Further, it is possible to provide a method of manufacturing a suction conveyance belt capable of cutting an engagement groove having a flat bottom surface without a core wire holding groove.

  Further, according to the present invention, a toothed suction-conveying belt having a core wire, provided with an engagement groove having a flat bottom surface without a core wire holding groove, without uneven thickness of a belt portion in a belt width direction. Can be provided.

The perspective view seen from the tooth surface side which shows an example of the suction conveyance belt concerning the present invention. Sectional drawing which cut | disconnects and shows the suction conveyance belt shown in FIG. 1 in a belt width direction. Sectional view along line (iii)-(iii) in FIG. Sectional view along line (iv)-(iv) in FIG. (A), (b) is sectional drawing which shows each other embodiment of the shape of an air suction port, respectively. 1 is a perspective view showing an example of a suction conveyance device to which a suction conveyance belt according to the present invention is attached, with a part thereof being cut away. Enlarged view of (vii) part in FIG. Explanatory drawing explaining an example of the manufacturing method of the suction conveyance belt according to the present invention. The figure which shows an example of the synchronous belt forming apparatus used for the manufacturing method of the suction conveyance belt which concerns on this invention. FIG. 9 is a perspective view of a toothed belt formed by the toothed belt forming apparatus shown in FIG. (A) is a diagram illustrating a molding die having a projection for positioning a core wire, and (b) is a diagram illustrating a molding die having no projection for positioning a core wire. FIG. 2 illustrates an example of a suction conveyance device using a conventional suction conveyance belt. A perspective view of a conventional suction conveyance belt viewed from a tooth surface side.

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

  First, the suction conveyance belt according to the present invention will be described.

  FIG. 1 is a perspective view showing an example of the suction conveyance belt according to the present invention, FIG. 2 is a cross-sectional view of the suction conveyance belt shown in FIG. 1 cut in the width direction, and FIG. 3 is (iii)-in FIG. FIG. 4 is a cross-sectional view taken along the line (iv)-(iv) in FIG. 2, and FIGS. 5A and 5B are cross-sectional views showing the shape of the air suction port. is there.

  The suction conveyance belt 1 includes two toothed belts 2 and 2 and a connecting portion 3 connecting the toothed belts 2 and 2. The two toothed belts 2, 2 are arranged side by side at a fixed interval, and are integrally connected by a connecting portion 3. The interval between the two toothed belts 2 is set to an interval into which a suction port provided in an air chamber of a suction conveyance device described later fits.

  The toothed belt 2 uses a toothed belt formed by a conventional general manufacturing method as it is, and a tooth portion 22 extending in a belt width direction is formed on one surface of a belt portion 21 over a belt length direction. A plurality of projections are provided integrally at a fixed interval. The toothed belt 2 is formed using a resin material generally used as a material of this type of belt, for example, an elastic material such as polyurethane.

  Inside the belt portion 21 of the toothed belt 2, a plurality of core wires 23 are juxtaposed in the width direction. The core wire 23 is supported by the core wire positioning projection 402 formed on the molding die 400 as shown in FIG. It is positioned and buried at a certain depth. Therefore, as shown in FIGS. 3 and 4, the projection 402 of the molding die 400 is transferred to the tooth bottom 24 between the adjacent teeth 22, 22, thereby forming a concave shape extending in the belt width direction. A core wire holding groove 25 is formed.

  The connecting portion 3 integrally connects the two toothed belts 2 and 2 with a resin material. No core wire is provided inside the connecting portion 3. As shown in FIG. 2, the connecting portion 3 shown in the present embodiment includes the entire back surfaces 21 a, 21 a of the two toothed belts 2, 2 (surfaces opposite to the surfaces on which the tooth portions 22 are protruded). , And are integrally formed from the belt portion back surfaces 21a, 21a to the belt side surfaces 21b, 21b of the belt portions 21, 21 facing each other. Therefore, since the connecting portion 3 connects the toothed belts 2 and 2 on a wide surface extending from the belt portion rear surface 21a to the belt portion side surface 21b, the toothed belts 2 and 2 can be strongly integrated. This is a preferred embodiment.

  The transport surface of the transported object in the suction transport belt 1 is formed by the connecting portion surface 3a of the connecting portion 3. The resin material used for such a connecting portion 3 can be formed of an appropriate resin material capable of exhibiting a predetermined flexibility required for this type of belt. The resin material may be the same resin material as the toothed belt 2 or a different resin material. From the viewpoint of improving the adhesion to the toothed belts 2 and 2, it is preferable to use the same resin material. When a different resin material is used, an appropriate resin material particularly suitable for suction-conveying an object to be conveyed can be arbitrarily selected separately from the resin material used for the toothed belt 2.

  In the connecting portion 3 located between the two toothed belts 2, 2, the connecting portion back surface 3 b which is the same surface as the tooth surface of each toothed belt 2, 2 is formed to be a flat surface. That is, each of the toothed belts 2 and 2 has a tooth portion 22 and a core wire holding groove 25, but neither the tooth portion nor the core wire holding groove is formed on the connecting portion back surface 3b, and , The flat surface is continuous. The connecting part back surface 3b side of the connecting part 3 becomes an engaging groove part 4 into which a suction port 202 provided in an air chamber described later fits, and the connecting part back surface 3b forms a bottom surface of the engaging groove part 4.

  The connecting portion back surface 3b is formed at the same height as the tooth bottom surfaces 24, 24 of the toothed belts 2, 2. Therefore, when the suction conveyance belt 1 is viewed in the belt width direction, the suction conveyance belt 1 from the connecting portion surface 3a of each toothed belt 2, 2 to the tooth bottom surfaces 24, 24 of each toothed belt 2, 2 is viewed. And the thickness of the belt portion of the suction conveyance belt 1 from the connecting portion front surface 3a to the connecting portion back surface 3b is the same. For this reason, the thickness of the belt portion of the suction conveyance belt 1 does not become uneven in the belt width direction, and there is no concern that the belt strength is reduced.

  A plurality of air suction ports 5 are formed through the connecting portion 3 located between the two toothed belts 2 and 2 at predetermined intervals in the belt length direction. That is, each air suction port 5 is opened on the bottom surface of the engagement groove portion 4 (the connection portion back surface 3b). Since neither the teeth nor the core wire is provided inside the connecting portion 3, there is no restriction on the interval and position of forming the air suction ports 5, and the air suction ports 5 can be efficiently arranged in an arbitrary arrangement. it can. In the present embodiment, the air suction ports 5 are provided in a central portion in the width direction of the belt so as to be arranged in one line along the length direction. However, for example, the air suction ports 5 are arranged in a staggered manner along the length direction of the belt. Or a plurality of rows may be arranged side by side.

  Further, the shape of the air suction port 5 is not limited at all, and may be any shape. For example, the cross-sectional shape of the air suction port 5 is not limited to the straight shape shown in FIGS. 2 and 4, but gradually expands toward the connecting portion surface 3a as a transport surface as shown in FIG. The diameter may be a tapered shape, or as shown in FIG. 5B, a stepped shape having a counterbore portion 51 having a large diameter on the connecting portion surface 3a side. The planar shape of the air suction port 5 is also arbitrary, such as a circular shape, an elliptical shape, a square shape, and a slit shape.

  FIG. 6 is a partially cutaway perspective view showing a suction conveyance device using the suction conveyance belt 1, and FIG. 7 is an enlarged view of a portion (vii) in FIG.

  In the suction conveyance device 100, an air conveyance belt 1 is stretched over a pair of pulleys 101, and an air chamber that performs air suction between the pulleys 101 over a predetermined length along a moving direction of the suction conveyance belt 1. 200 are provided. The air chamber 200 is connected to a suction source (not shown) via an air hose 203.

  On the upper surface of the air chamber 200, a suction portion 201 for performing air suction is formed so as to protrude in a stepped manner over the length direction. The protrusion width of the suction part 201 is formed to be substantially the same as the groove width of the engagement groove part 4 of the suction conveyance belt 1. Therefore, when the suction conveyance belt 1 is mounted on the suction conveyance device 100, the suction portion 201 fits into the engagement groove portion 4, and guides the suction conveyance belt 1 while regulating the position in the belt width direction when the suction conveyance belt 1 moves. It has become.

  The upper end surface 201a of the suction unit is formed as a smooth surface, and comes in contact with the back surface 3b of the connecting portion of the suction conveyance belt 1. The air suction port 5 of the suction conveyance belt 1 is opened at a position where it passes immediately above a suction port 202 formed in the suction section 201. Therefore, when air is sucked from the suction unit 201 of the air chamber 200 in this state, the inside of the air chamber 200 becomes negative pressure, air is sucked from the air suction port 5 of the suction conveyance belt 1, and the conveyance surface of the suction conveyance belt 1 is conveyed. The transported object A placed on the (connection surface 3a) is transported by suction.

  At this time, since the connecting portion back surface 3b forming the bottom surface of the engaging groove portion 4 is not formed with the core wire holding groove but is formed on a flat surface, the connecting portion back surface 3b is in close contact with the upper end surface 201a of the suction portion 201 of the air chamber 200. I do. Therefore, according to the suction conveyance device 100 using the suction conveyance belt 1, it is possible to minimize the suction of air from a portion other than the air suction port 5 of the suction conveyance belt 1, thereby greatly increasing the suction efficiency. Can be improved. For this reason, useless output of a suction means such as a vacuum pump can be suppressed, and energy can be saved. In addition, since there is no need to make any changes on the air chamber 200 side, the present invention can be applied to an existing suction and transfer device as it is.

  Next, a method of manufacturing the suction conveyance belt 1 will be described with reference to FIGS.

  First, as shown in FIG. 8, two toothed belts 2, 2 each having a core wire 23 embedded therein are prepared. These toothed belts 2 and 2 have the same shape, and those manufactured by a conventional general method of manufacturing a toothed belt using a molding die 400 shown in FIG. The belt portion 21 of the toothed belt 2 has a tooth portion 22 protruding on one side and a plurality of core wires 23 embedded therein. A core wire holding groove 25 to which the protrusion 402 of the molding die 400 is transferred is formed on the tooth bottom surface 24 between the adjacent tooth portions 22, 22 over the entire length in the belt width direction.

  Next, these two toothed belts 2 and 2 are set in a toothed belt forming apparatus using a forming die 500 shown in FIG. 11B having a protrusion 501 having no protrusion for positioning a core wire. . This molding die 500 is an existing molding die in which each protruding portion 501 is formed at the same height and the same pitch as each protruding portion 401 of the molding die 400 for manufacturing the toothed belt 2.

  FIG. 9 shows an example of the toothed belt forming apparatus. The toothed belt forming apparatus 300 has a steel belt 302 stretched around three rotating rollers 301, and the steel belt 302 is arranged so as to be close to the outer peripheral side of the molding die 500.

  When setting the two toothed belts 2 and 2 in the toothed belt forming apparatus 300, each tooth 22 is meshed between adjacent protrusions 501 and 501 of the molding die 500, and an interval is set in the belt width direction. And set it. The interval between the toothed belts 2, 2 is set to be the width of the engagement groove 4 of the suction conveyance belt 1 finally obtained. No core wire is set in the molding die 500.

  Thereafter, a liquid resin material is poured into the gap X between the steel belt 302 and the molding die 500, and the rotating roller 301 and the molding die 500 are rotated to move the steel belt 302 in the direction of the arrow. Thereby, the connecting part 3 for integrally connecting the two toothed belts 2, 2 is formed by the poured resin material. As shown in FIG. 2, the connecting portion 3 is formed from the back surface 21a of the belt portion of each of the toothed belts 2 and 2 to the side surface 21b of the belt portion.

  As shown in FIG. 10, the connecting portion 3 formed by this is formed with the tooth portions 31 connected to the tooth portions 22, 22 of the toothed belts 2, 2 between the adjacent protruding portions 501, 501 of the molding die 500. Is a protruding toothed connecting portion. However, since the protruding portion 501 of the molding die 500 does not have a projection for positioning the core wire, a core wire holding groove is not formed in the formed connecting portion 3 and the core wire is also buried. Not.

  Next, the teeth 31 of the connecting portion 3 located between the two toothed belts 2, 2 are cut by appropriate means to form the engaging groove 4. The depth of the cutting process at this time is set so that the height of the connecting portion rear surface 3b after cutting is the same as the tooth bottom surfaces 24, 24 of the toothed belts 2, 2. As a result, the bottom surface of the engagement groove 4 (the connecting portion back surface 3b) becomes a smooth flat surface as shown in FIG. Thereafter, the suction conveyance belt 1 is manufactured by piercing the air suction port 5 in the connecting portion 3 located between the toothed belts 2, 2.

  In the obtained suction conveyance belt 1, the two toothed belts 2, 2 are firmly integrated by the connecting portion 3, and the toothed belts 2, 2 extend from the connecting portion surface 3a to the tooth bottom surfaces 24, 24. Since the thickness of the belt portion becomes uniform in the belt width direction, there is no concern that the belt strength is reduced. In addition, molding can be performed using the existing molding dies 400 and 500, and there is no need to newly produce a molding die, so that initial costs are not generated. Therefore, it is possible to easily cope with small lot production.

In the above description, the air suction port 5 is formed after the engaging groove 4 is cut. However, the connecting portion 3 before forming the engaging groove 4 is formed with the tooth portion 31 before cutting. You may.
Further, in the present invention, an embodiment using two toothed belts is shown, but the present invention is not limited to this, and a configuration is provided in which two or more connecting portions are provided using three or more toothed belts, It is suitable when forming the suction conveyance belt of FIG.

1: Suction conveyance belt 2: Toothed belt 21: Belt portion 21a: Belt back surface 21b: Belt side surface 22: Tooth portion 23: Core line 24: Tooth bottom surface 25: Core line holding groove 3: Connection portion 3a: Connection portion surface 3b : Back side of connecting part 31: Tooth part 4: Engagement groove part 5: Air suction port 51: Counterbore part 100: Suction conveyance device 101: Pulley 200: Air chamber 201: Suction part 201 a: Suction part upper end face 202: Suction port 203: Air hose 300: Toothed belt forming device 301: Rotating roller 302: Steel belt 400: Molding die 401: Projecting portion 402: Projecting portion 500: Molding die 501: Projecting portion A: Conveyed object

Claims (6)

A method for manufacturing a toothed suction / conveying belt having an engagement groove portion along a belt length direction engaging with a suction portion of an air chamber, an air suction port opened in the engagement groove portion, and a core wire provided in the belt portion. And
A step of preparing two or more toothed belts having a core wire inside;
After setting the prepared two or more toothed belts at intervals in the belt width direction and setting them in a toothed belt forming die having no projection for positioning a core wire, a resin material is stretched over the adjacent toothed belts. By pouring, a step of integrally forming a toothed connecting portion having no core wire,
By cutting the tooth portion of the connection portion from the tooth surface side of the formed connection portion, the engagement groove portion in which the connection portion between the adjacent toothed belts is a flat surface is formed. Process and
Forming an air suction port in the connecting portion before or after the formation of the engagement groove portion.   In the step of integrally forming the connecting portion, the connecting portion is integrally formed from a side surface of the belt portion facing the adjacent toothed belt to a back surface of each belt portion of the toothed belt. The method for producing a suction conveyance belt according to claim 1.   3. The method according to claim 1, wherein, in the step of integrally forming the connecting portion, the connecting portion is formed of the same resin material as the toothed belt. 4. A toothed suction conveyance belt having an engagement groove portion along a belt length direction engaged with a suction portion of an air chamber, an air suction port opened in the engagement groove portion, and a core wire provided in the belt portion. ,
Are arranged at two or more intervals toothed toothed belt width direction consisting of a belt having a core therein, said toothed belt adjacent coupling portion made no resin core is bonded, The adjacent toothed belts are integrally connected by the connecting portion ,
The connecting portion has a flat surface of the root surface and the same height of the toothed belt adjacent contact are the engagement groove formed by the flat surface,
Before SL connecting portion, the suction conveyor belt, wherein the air suction port is formed. The connecting portion is adhered to each of the adjacent toothed belts from the opposite side of each belt portion of the adjacent toothed belts to the back surface of each belt portion of the toothed belt. The suction conveyance belt according to claim 4, wherein the suction conveyance belt is provided.   The suction conveying belt according to claim 4, wherein the connecting portion is formed of the same resin material as the toothed belt.

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