JP2010058955A - Package brake and automatic winder equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase braking force without excessively increasing the force of holding a paper pipe during braking, in a package brake which is applied to an automatic winder and gives the braking force to a winding package. <P>SOLUTION: First acting force (f1) directed forward to the paper pipe 21 and demonstrating the braking force between an operating member 32 and a holding member 31, and second acting force (f2) directed backward away from the paper pipe 21 and demonstrating the braking force between the operating member 32 and the holding member 31, are given to both members 31, 32. Thus an excessive increase in the holding force can be effectively suppressed while increasing the braking force. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a package brake that applies a braking force derived from fluid pressure to a winding package composed of a paper tube that is driven to rotate and a yarn that is wound on the surface of the paper tube, and the package brake. It relates to the automatic winder provided.

  2. Description of the Related Art Conventionally, a winding unit of an automatic winder that is a winding device is provided with a package brake that applies a braking force to a winding package that is rotated by a traverse drum. A conventional configuration of such a package brake is shown in FIG. Note that a brake package having a configuration substantially similar to that shown in FIG.

  As shown in FIG. 10, the package brake includes a bottomed cylindrical housing 101 having an opening, a brake shoe 102 that is fitted into the front opening so as to fit inside, and a bearing center that is fitted to the front end of the brake shoe 102. 103. The brake shoe 102 and the bearing center 103 are configured to be movable relative to the housing 101 in the front-rear direction. The brake shoe 102 includes a shaft 104 that is inserted into the housing 101, a flange 105 that projects outward from the front end of the shaft 104, and an outer sleeve 106 that extends rearward from the outer peripheral edge of the flange 105. A friction material 107 for applying a braking force to the bearing center 103 is attached to the front surface of the flange 105. Between the rear end portion of the shaft 104 and the rear end portion of the housing 101, an air chamber 110 that receives supply of air from the compressor 109 via an electromagnetic valve 109a and an air introduction port 108 is provided. Housed in the chamber 110 is a torsion coil-shaped first spring 111 that applies a forward biasing force to the brake shoe 102. Reference numeral 112 denotes a seal member for shielding between the inner surface of the housing 101 and the outer peripheral surface of the brake shoe 102.

  A hollow chamber 113 having a front opening is provided from the front and rear center to the front end of the shaft 104, and a shaft 114 of a bearing center is inserted into the hollow chamber 113. The bearing center 103 is formed by the shaft 114 described above and a holder portion 115 provided at the front end of the shaft, and the front surface of the holder portion 115 enters one side surface of the paper tube 21, and the paper tube 21. It is formed in the taper shape of the front constriction which presses. Inside the hollow chamber 113, a second spring 116 for pressing the brake shoe 102 backward is assembled in a normal state where no braking force is applied. A bearing 117 is provided at the front end of the hollow chamber 113, and the bearing center 103 is configured to be able to rotate along with the paper tube 21 via the bearing 117.

Japanese Patent Laid-Open No. 10-25061 (see FIG. 3)

  In this package brake, the urging force of the first spring 111 acts on the bearing center 103 in a normal state where no braking force is applied. That is, the bearing center 103 is pressed forward by the urging force (A) of the first spring 111, and the paper tube 21 is held using the pressing force as a holding force (holding force F1 = A).

  When working air is supplied from the compressor 109 into the air chamber 110 via the air introduction port 108, a braking force is applied to the bearing center 103 and rotation of the paper tube (winding package) is stopped. Specifically, when working air is supplied into the air chamber 110, the shaft 104 of the brake shoe 102 is pressed forward by the air pressure, and the friction material 107 of the brake shoe 102 is moved to the holder portion of the bearing center 103. In contact with 115, a braking force is applied to the bearing center 103. At this time, the resultant force of the urging force (A) derived from the first spring 111 and the pressing force (f1) derived from the air pressure acts on the paper tube 21, and the paper tube 21 is held by the resultant force. (Holding force F2 = A + f1). Further, between the friction material 107 and the holder portion 115, the attachment force derived from the second spring 116 is obtained from the resultant force of the urging force (A) derived from the first spring 111 and the pressing force (f1) derived from the air pressure. A surface pressure obtained by subtracting the force (R) is applied, whereby a braking force (B) is applied to the bearing center 103 (B = A + f1-R).

  For this reason, when the braking force (B) is increased, that is, when the air pressure is increased, the pressing force (f1) derived from the air pressure is increased, so that a larger holding force (F2) is applied to the paper tube 21. The paper tube 21 may be damaged. Such a problem can be solved by reducing the air pressure, for example. However, when the air pressure is reduced, the surface pressure between the friction material 107 and the holder portion 115 decreases, so that it is inevitable that the braking force (B) decreases, and the time required until the winding package stops rotating. However, there is a disadvantage that it takes a long time.

  The present invention has been made to solve the problems of the conventional package brake as described above, and to increase the braking force without excessively increasing the holding force of the paper tube during braking. It is an object of the present invention to provide a package brake capable of performing the above and an automatic winder having the same.

  The present invention is directed to a package brake that applies a braking force derived from fluid pressure to a winding package composed of a paper tube and a thread wound on the surface of the paper tube. In this package brake, a holding member that holds one side surface of the paper tube and an operating member that contacts the holding member and applies a braking force are assembled in a cylindrical housing. When the working fluid is received, the holding member and the actuating member are configured to be able to move independently with respect to the housing in the forward direction toward the paper tube and the backward direction away from the paper tube. In a state where no braking force is applied, the holding member is pressed forward by the pressing element. Then, by receiving the supply of the working fluid, a first acting force that is directed in the forward direction toward the paper tube and a second acting force that exerts a braking force between the actuating member and the holding member are: The actuating member and the holding member are provided.

  Specifically, a cylindrical housing, a hollow cylindrical operating member mounted on the housing so as to be movable in the front-rear direction, and a holding member mounted on the housing and the operating member so as to be movable in the front-rear direction. Have. The holding member includes a shaft that is pivotally supported by the operating member, and a paper tube holding portion that is formed to protrude from a front end of the shaft, and the paper tube holding portion accompanies the paper tube with the shaft as a rotation axis. It is configured to be rotatable. In a normal state, when the shaft receives a forward pressing force from the pressing element, the front surface of the paper tube holding portion is pressed against one side surface of the paper tube to hold the paper tube. When the operating member moves relative to the holding member by the second acting force, the friction material provided on the front side of the operating member is pressed against the paper tube holding portion, and the braking force on the holding member is increased. It has come to be demonstrated. By supplying the working fluid, a first fluid chamber for obtaining the first acting force and a second fluid chamber for obtaining the second acting force are provided.

  The package brake according to the present invention includes a cylindrical housing, a hollow cylindrical holding member that is movably mounted on the housing, and an operating member that is movably mounted on the housing and the holding member. It can be made into the form which has. The actuating member includes a shaft that is pivotally supported by the holding member, and a brake shoe that is formed to protrude from a front end of the shaft. A part of the brake shoe exhibits a braking force against the holding member. A friction material is provided. The holding member includes an inner sleeve assembled in the housing, an outer sleeve held in an outer fitting manner in the housing portion, and a paper tube holding portion for holding a paper tube, It is configured to be able to rotate along with the paper tube about the shaft of the operating portion as a rotation axis. In a normal state, when the rear end portion of the inner sleeve receives a forward pressing force from the pressing element, the front surface of the paper tube holding portion is pressed against one side surface of the paper tube to hold the paper tube. The operating member is moved relative to the holding member by the second acting force, so that the friction material is pressed against the paper tube holding portion so that a braking force is exerted on the holding member. It has become. A first fluid chamber is provided between the housing and the holding member to obtain the first acting force by receiving a supply of working fluid, and between the operating member and the holding member, A second fluid chamber for obtaining the second acting force is provided.

  The form which the said 1st fluid chamber and the said 2nd fluid chamber are connecting can be taken.

  The braking force applied to the holding member can be adjusted according to the package diameter of the winding package.

  The braking force applied to the holding member can be adjusted in accordance with the number of rotations of the winding package.

  The present invention also provides an automatic winder comprising the above package brake.

  In the package brake according to the present invention, by receiving the supply of the working fluid, the first acting force that is directed in the forward direction toward the paper tube and the braking force are exerted between the actuating member and the holding member. The second acting force is applied to the operating member and the holding member. That is, when the working fluid is supplied, the first acting force is applied to one of the operating member and the holding member, and the second acting force is applied to both members.

As described above, when the working fluid is supplied, the working member and the holding member can be moved in the front-rear reverse direction, so that a braking force derived from the second acting force can be applied between the two members. Therefore, it becomes easy to improve the braking force only by moving the operating member in the forward direction as compared with the conventional embodiment in which the braking force is obtained.
In addition, the second acting force is a force that affects the braking operation, and does not affect the holding force on the paper tube during braking. Therefore, by increasing the second acting force, it is possible to effectively suppress an increase in the holding force while increasing the braking force.

  As described above, in the package brake according to the present invention, when the working fluid is supplied, not only the acting force in the direction toward the paper tube (first acting force) but also the acting force (second acting) that exerts the braking force. Therefore, the braking force can be reliably improved while suppressing an increase in the holding force. Therefore, it is possible to effectively solve problems such as breakage of a paper tube caused by excessive holding force accompanying increase in braking force, which is unavoidable with conventional package brakes.

  Specifically, the operating member is mounted on the housing, the holding member includes a shaft that is pivotally supported by the operating member, and a paper tube holding portion that is formed to protrude from the front end of the shaft. By relatively moving with respect to the holding member by two acting forces, it is possible to exert a braking force on the holding member. A first fluid chamber for obtaining the first acting force and a second fluid chamber for obtaining the second acting force are provided.

  According to this, when the working fluid is supplied during braking, the working member generates a pressing force (first acting force) directed to the paper tube side generated in the first fluid chamber and generated in the second fluid chamber. A pressing force (second acting force) is applied to relatively move the friction material provided on the actuating member in a direction in which the friction material comes into contact with the holding member. Accordingly, during braking, a large braking force derived from the resultant force of the first acting force and the second acting force can be reliably obtained. Further, since the braking force by the second acting force does not act as a force for pressing the paper tube, it is possible to prevent the holding force on the paper tube from becoming excessive. Therefore, it is possible to increase the braking force while effectively preventing the paper tube from being damaged.

  The holding member is movably mounted on the housing, and the operating member has a shaft that is pivotally supported by the holding member, and a brake shoe that projects from the front end of the shaft, and the operating member is held by the second acting force. By moving relative to the member, the friction material is pressed against the paper tube holding portion, and a braking force can be exerted on the holding member. A first fluid chamber for obtaining a first acting force is provided between the housing and the holding member by receiving the supply of the working fluid, and a second action is provided between the working member and the holding member. A second fluid chamber is provided for obtaining a force.

  According to this, when a working fluid is supplied during braking, a braking force (second acting force) generated in the second fluid chamber acts on the working member, and a holding member generates in the first fluid chamber. A pressing force (first acting force) directed to the paper tube side is applied. Therefore, at the time of braking, a braking force derived from the resultant force of the first acting force and the second acting force can be reliably obtained. Further, the second acting force affects the braking operation and does not affect the holding force with respect to the paper tube. Therefore, it is possible to increase the braking force while effectively preventing the paper tube from being damaged.

  The working fluid for the first and second fluid chambers can be supplied from independent and separate fluid supply means (for example, a compressor), but the working fluid can be supplied to both fluid chambers from a single fluid supply means. This is preferable for simplifying the apparatus. In this case, it is preferable to adopt a form in which the two fluid chambers communicate with each other, so that the working fluid is supplied to both the fluid chambers simply by opening one fluid supply port in the working member or the holding member. can do.

  When many yarns are wound on a paper tube to increase the package diameter and the weight of the winding package increases, a large braking force is required to stop the winding package. Conversely, when the package diameter is small, the winding package is light and can be stopped with a small braking force. Therefore, if the braking force applied to the holding member can be adjusted according to the package diameter of the winding package, the winding package can be stopped by applying the braking force without excess or deficiency. This means that it is possible to prevent an excessive load from being applied to the paper tube, and therefore it is possible to effectively prevent the paper tube from being damaged.

  When the winding package has a small number of rotations, the winding package can be stopped only by applying a small braking force. Conversely, when the winding package has a large number of rotations, a larger braking force is required. It becomes. Therefore, if the braking force applied to the holding member can be adjusted according to the number of rotations of the winding package, the winding package can be stopped by applying braking force without excess or deficiency. The paper tube can be effectively prevented from being damaged due to the excessive holding force applied to the paper tube.

  If the automatic winder is provided with the package brake as described above, it is possible to contribute to improving the reliability of the automatic winder.

First Embodiment FIGS. 1 to 5 show an embodiment in which a package brake according to the present invention is applied to a winding unit of an automatic winder. As shown in FIG. 2, the winding unit 1 includes a guide 3 that guides the yarn Y from the yarn feeding bobbin 2, a tensor 4 that applies an appropriate tension to the yarn Y, a yarn splicing device 5, and a defect of the yarn Y. A slab catcher 6 or the like for detecting the above is arranged from the lower part of the aircraft toward the upper part of the aircraft.

  A traverse drum 7 that traverses the yarn Y in a certain width range, a guide plate 8 that faces the traverse region of the traverse drum 7, and a winding package 9 are rotatably mounted on the front upper portion of the machine body. In addition to these devices in which a supporting cradle 10 (see FIG. 3), a package brake 11 for applying a braking force to the winding package 9 and the like are arranged, the cut yarn is sucked and captured to be spliced. A relay pipe 12 and a suction mouth 13 to be passed to the device 5 are provided in the middle part of the previous device row so as to be able to turn in the vertical direction. The yarn Y fed out from the yarn feeding bobbin 2 is checked for the presence of yarn defects when passing through the previous slab catcher 6, and when a yarn defect is found, it is cut by a cutter provided in the slab catcher 6, The yarn defect portion is removed by suction.

  The package brake 11 receives a supply of working air (working fluid) from the compressor 20 and applies a braking force to the paper tube 21 of the winding package 9. An electromagnetic valve 24 that is turned on and off by a control circuit 23 is provided in the middle of the flow path 22 from the compressor 20 to the package brake 11. As shown in FIG. 3, the paper tube 21 is formed in a tapered shape that has a large diameter on the rear end side held by the package brake 11 and gradually decreases in diameter toward the front.

  As shown in FIG. 1, the package brake 11 includes a bottomed cylindrical housing 30 having a front opening 30a, and a holding member that holds the paper tube 21 by pressing the rear end portion of the paper tube 21 forward. 31, an operating member 32 that contacts the holding member 31 and applies a braking force, a first spring 33 (pressing element) that urges the holding member 31 forward, and, in a normal state, the operating member 32 and the holding member 31 And a second spring 34 for applying an urging force for separating the two.

  The actuating member 32 has an inner sleeve 41 inserted into the housing 30 from the front opening 30a and an outer sleeve 42 extending in the front-rear direction from the front end portion 30a. Prepare. A slight margin E is formed between the outer peripheral surface of the inner sleeve 41 and the inner peripheral surface of the housing 30. Reference numeral 43 indicates a ring-shaped seal member embedded and fixed on the inner wall surface of the inner sleeve 41.

  The outer sleeve 42 is formed in a cylindrical shape and has an opening in the axial direction. The outer sleeve 42 is provided with an air introduction port 45 that allows inflow of working air from the compressor 20. The inner diameter dimension of the outer sleeve 42 is set to be larger than the outer diameter dimension of the housing 30, and is configured to be movable in the front-rear direction along the outer peripheral surface of the housing 30 and not rotatable. A friction material 46 made of rubber is embedded in the front end portion of the outer sleeve 42. The friction material 46 is a ring body whose front end side is cut obliquely, and the front end inclined surface 46 a contacts the opposing wall surface of the holding member 31 during a braking operation. A ring-shaped seal member 47 for sealing and sealing a gap with the outer peripheral surface of the housing 30 is embedded in the rear end portion of the outer sleeve 42.

  The holding member 31 includes a shaft 50 penetrating the inner sleeve 41 in the front-rear direction, a bearing 51 provided at the front end portion of the shaft 50, and a bearing center (paper tube support portion) mounted rotatably via the bearing 51. 52. The shaft 50 includes a shaft body 50a, a bearing support portion 50b connected to the front end portion of the shaft body 50a, and a spring retainer portion 50c that is formed in a flange shape at the rear end portion of the shaft body 50a. . A torsion coil-shaped first spring 33 is in contact with the spring retainer 50c, and the entire holding member 31 is constantly urged forward by the first spring 33. A ring-shaped seal member 54 is embedded in the outer peripheral surface of the spring retainer 50c, and the seal member 54 allows the interior of the housing 30 to be connected to a second air chamber 65 (described later) on the front side and a spring on the rear side. It is partitioned into a chamber 55.

  A bearing 51 is attached to the bearing support portion 50b. Between the front end surface of the inner sleeve 41 of the operating member 32 and the bearing 51, a second spring 34 is provided that exerts a repulsive force when the operating member 32 and the holding member 31 come closer than a predetermined distance.

  The bearing center 52 includes a cylindrical shaft portion 60 that is supported by the bearing 51 and a holder portion 61 that extends from the front end of the cylindrical shaft portion 60. The front surface of the holder part 61 is formed in a tapered shape with a front constriction. Further, the rear surface of the holder portion 61 is a back-up tapered surface that matches the inclination angle of the tapered surface of the friction material 46.

  In addition, in the package brake 11 according to the present embodiment, for the purpose of obtaining a braking force, the first action of pressing the operating member 32 toward the paper tube side when the operating air is supplied from the air introduction port 45 to the inside of the apparatus. It is noted that the force (f1) and the second acting force (f2) that presses the holder portion 61 of the holding member 31 and the friction material 46 of the operating member 32 in a contacting direction are applied (see FIG. 5). Specifically, when operating air supplied from the air inlet 45 is received in the apparatus constituted by the housing 30, the operating member 32, and the holding member 31, the operating member 32 is pressed in the direction toward the paper tube 21. A first air chamber 64 for obtaining a first acting force (f1) and a direction communicating with the first air chamber 64 so that the holder portion 61 of the holding member 31 and the friction material 46 of the operating member 32 are brought into contact with each other. The second air chamber 65 for obtaining the second acting force (f2) to be pressed was formed. In the present embodiment, as shown in FIG. 1, the first air chamber 64 is formed in a gap defined by the outer peripheral surface of the inner sleeve 41 of the operating member 32, the inner peripheral surface of the outer sleeve 42, and the rear surface of the flange 40. did. The second air chamber 65 is formed in a gap defined by the front surface of the spring retainer portion 50 c of the holding member 31, the inner peripheral surface of the housing 30, and the rear end surface of the inner sleeve 41 of the operating member 32. The first and second air chambers 64 and 65 are communicated with each other through a clearance gap E formed between the outer peripheral surface of the inner sleeve 41 and the inner peripheral surface of the housing 30.

  When the working air supplied from the air inlet 45 is filled in the first air chamber 64, the second air chamber 65, and the margin gap E, it is derived from the air pressure that presses the rear surface of the flange 40 toward the paper tube side. The first acting force (f1) and the second acting force (f2) derived from the air pressure that presses the spring retainer portion 50c of the holding member 31 and the inner sleeve 41 of the operating member 32 apart from each other are It acts on the members 31 and 32.

As shown in FIG. 4, in a normal state where no braking force is applied, a pressing force (A) derived from the urging force of the first spring 33 acts on the paper tube. That is, the pressing force (A) becomes the holding force (F1) of the paper tube 21 in the normal state.
As shown in FIG. 5, during braking, the resultant force of the pressing force (A) derived from the first spring 33 and the first acting force (f1) acts on the paper tube 21 (F2 = A + f1). Further, the value obtained by subtracting the pressing force (R) of the second spring 34 from the resultant force of the first acting force (f1) and the second acting force (f2) is the same as the operating member 32 (friction material 46) during braking. It acts as a surface pressure (B: braking force) between the holding member 31 (holder 61) (B = f1 + f2-R).

  As described above, in the package brake according to the present embodiment, the pressing force (A) and the first acting force (f1) act on the paper tube 21 as the holding force (F2) during braking, and the first action. Since the braking force (B: surface pressure) based on the resultant force (f1) and the second acting force (f2) is exerted, the holding force (F2) of the paper tube 21 during braking is excessively increased. Without increasing the braking force (B), the braking force (B) can be increased. That is, in the conventional package brake as shown in FIG. 10, if the first acting force (f1) is increased for the purpose of increasing the braking force (B), the first acting force (f1) is directly reduced. Since it acts on the holding force (F2), it is inevitable that the holding force (F2) increases, and the paper tube 21 may be damaged. On the other hand, in the package brake 11 according to the present embodiment, not only the first acting force (f1) but also the braking force (B) derived from the resultant force obtained by adding the second acting force (f2) thereto is the operating member. Since it acts between 32 and the holding member 31, it is easy to increase the braking force (B). Therefore, it is possible to increase the braking force (B) while suppressing an increase in the holding force (F2) of the paper tube 21 during braking.

  The braking force (B) applied to the holding member 31 can be adjusted according to the package diameter of the winding package 9. That is, a sensor for detecting the package diameter of the winding package 9 is provided, and the amount of operating air supplied to the package brake 11 is adjusted by the electromagnetic valve 24 based on the detection value from the sensor, so that the braking force (B) Can be adjusted to large or small. According to this, when the package diameter is small, it is determined that the weight of the winding package 9 is small and a small braking force is applied, and when the package diameter is large, it is determined that the weight of the winding package 9 is large. Thus, the winding package 9 can be stopped by applying the braking force (B) without excessive or insufficient so as to apply a large braking force. Therefore, the load (holding force (F2)) applied to the paper tube 21 can be prevented from becoming excessive, and the paper tube 21 can be effectively prevented from being damaged.

  The braking force (B) applied to the holding member 31 may be adjusted by the electromagnetic valve 24 in accordance with the rotational speed of the winding package 9. According to this, when the rotational speed of the winding package 9 is small, a small braking force (B) is given, and conversely, when the rotational speed of the winding package 9 is large, a larger braking force (B). The winding package 9 can be stopped by applying the braking force (B) without excess or deficiency. Therefore, also in this case, the load (holding force (F2)) applied to the paper tube 21 can be prevented from being excessive, and the paper tube 21 can be effectively prevented from being damaged.

Second Embodiment FIGS. 6 to 8 show a second embodiment of the package brake of the present invention. As shown in FIG. 6, the package brake 11 includes a bottomed cylindrical housing 30 having a front opening 30a, and a holding member that holds the paper tube 21 by pressing the rear end portion of the paper tube 21 forward. 31, an actuating member 32 that contacts the holding member 31 and applies a braking force, and a first spring 33 that urges the holding member 31 forward are provided as constituent elements.

  In the holding member 31 according to the present embodiment, a flange 70 projects from the peripheral surface near the front end, and extends in the rear direction from the inner sleeve 71 inserted into the housing 30 through the front opening 30a and the front end of the flange 70. An outer sleeve 72 and a bearing center (paper tube holding portion) 52 configured to be rotatable via a bearing 51 attached to a front end portion of the inner sleeve 71 are provided. The inner sleeve 71 has a cylindrical shape and has openings on the front and rear sides thereof. A slight margin E is formed between the outer peripheral surface of the inner sleeve 71 and the inner peripheral surface of the housing 30. Reference numeral 73 denotes a ring-shaped seal member embedded and fixed on the inner surface of the inner sleeve 71.

  The outer sleeve 72 is formed in a cylindrical shape having an opening on the rear side, and is provided with an air introduction port 74 that allows inflow of working air from the compressor 20. The inner diameter dimension of the outer sleeve 72 is set to be larger than the outer diameter dimension of the housing 30, and is configured to be movable in the front-rear direction along the outer peripheral surface of the housing 30 and non-rotatable. A ring-shaped sealing member 75 for sealing and sealing a gap with the outer peripheral surface of the housing 30 is embedded in the rear end portion of the outer sleeve 72.

  The bearing center 52 includes a cylindrical shaft portion 76 on which the bearing 51 is mounted and a holder portion 77 formed to project from the outer peripheral surface of the cylindrical shaft portion 76, and is configured to be rotatable with respect to the front end of the inner sleeve 71. Yes. The front surface of the holder portion 77 is formed in a tapered shape that is rearwardly narrowed.

  The operating member 32 includes a shaft 80 that passes through the inner sleeve 71 in the front-rear direction and a brake shoe 81 that is attached to the front end of the shaft 80, and is attached to the housing 30 so as to be movable in the front-rear direction and non-rotatable. Yes. The shaft 80 has an outer dimension that is substantially the same as the inner diameter dimension of the inner sleeve 71, and a shaft main body 80 a that is fitted into the inner sleeve 71 in an inner fitting manner, and a flange-like shape at the rear end of the shaft main body 80 a The spring retainer portion 80b is formed with an overhang. A torsion coil-shaped first spring 33 is in contact with the spring retainer portion 80b, and the holding member 31 is always urged forward by the first spring 33. That is, the entire operation member 32 is moved and urged forward by the urging force of the first spring 33, and the holder portion 77 is pressed and urged forward by the movement urge of the operation member 32. The holding member 31 is biased forward. A ring-shaped seal member 83 is embedded in the outer peripheral surface of the spring retainer portion 80b. By this seal member 83, the inside of the housing 30 is connected to the second air chamber 65 on the front side and the spring chamber 55 on the rear side. It is divided into.

  The brake shoe 81 is a disc body having a central opening, and is fixed to the tip of the shaft body 80a. A friction material 46 made of rubber is embedded in the rear end surface of the brake shoe 81. The friction member 46 is a ring body whose rear end side is obliquely cut out, and the rear end inclined surface 46 a contacts the opposing wall surface of the holder portion 77 of the holding member 31 during a braking operation.

  In addition, in the package brake 11 according to the present embodiment, for the purpose of obtaining a braking force, the first acting force that presses the holding member 31 toward the paper tube side when operating air is supplied into the apparatus from the air introduction port 74. In addition to (f1), attention is focused on the fact that a second acting force (f2) for moving the holding member 31 and the actuating member 32 in a direction in which the holder portion 77 and the friction material 46 are brought into contact with each other is applied. The Specifically, when supply of operating air from the air introduction port 74 is received inside the apparatus constituted by the housing 30, the operating member 32 and the holding member 31, the holding member 31 is pressed in the direction toward the paper tube 21. A first air chamber 64 for obtaining a first acting force (f1) and a direction communicating with the first air chamber 64 so that the holder portion 77 of the holding member 31 and the friction material 46 of the operating member 32 are brought into contact with each other. The second air chamber 65 for obtaining the second acting force (f2) to be pressed was formed. In the present embodiment, the first air chamber 64 is formed in a gap defined by the outer peripheral surface of the inner sleeve 71 of the holding member 31, the inner peripheral surface of the outer sleeve 72, and the rear surface of the flange 70. A second air chamber 65 is formed in a gap defined by the front surface of the spring retainer portion 80 b, the inner peripheral surface of the housing 30, and the rear end surface of the inner sleeve 71 of the holding member 31. The first and second air chambers 64 and 65 are communicated with each other through a margin gap E formed between the outer peripheral surface of the inner sleeve 71 and the inner peripheral surface of the housing 30.

  When the working air supplied from the air introduction port 74 is filled in the first air chamber 64, the second air chamber 65, and the margin gap E, the air that presses the rear surface of the flange 70 of the holding member 31 forward. The first acting force (f1) derived from the pressure and the second acting force (f2) derived from the air pressure that presses the spring retainer portion 80b of the operating member 32 and the inner sleeve 71 of the operating member 32 apart from each other. Acts on both members 31 and 32 (see FIG. 8).

As shown in FIG. 7, in a normal state where no braking force is applied, a pressing force (A) derived from the urging force of the first spring 33 acts on the paper tube. That is, the pressing force (A) becomes the holding force (F1) of the paper tube 21 in the normal state.
As shown in FIG. 8, at the time of braking, the resultant force of the pressing force (A) derived from the first spring 33 and the first acting force (f1) acts on the paper tube 21 as the holding force (F2). (F2 = A + f1). Further, the force obtained by subtracting the pressing force (A) derived from the first spring 33 from the second acting force (f2) is a force between the operating member 32 (friction material 46) and the holding member 31 (holder portion 77) during braking. It becomes the surface pressure (B) acting between them (B = f2-A).

  As described above, in the package brake according to the present embodiment, the resultant force of the pressing force (A) and the first acting force (f1) acts on the paper tube 21 as the holding force (F2) and the second acting force. Since the force obtained by subtracting the pressing force (A) derived from the first spring 33 from (f2) acts as the braking force (B: surface pressure) between the operating member 32 and the holding member 31, The braking force (B) can be increased without excessively increasing the holding force (F2) of the paper tube 21 in FIG. That is, in the conventional package brake as shown in FIG. 10, if the first acting force (f1) is increased for the purpose of increasing the braking force (B), the first acting force (f1) is directly reduced. Since it acts on the holding force (F2), an increase in the holding force (F2) is unavoidable, and there is a risk of damaging the paper tube 21. On the other hand, in the package brake 11 according to the present embodiment, the braking force (B) derived from the second acting force (f2) different from the first acting force (f1) is generated between the operating member 32 and the holding member 31. Therefore, it is easy to distinguish between the holding force (F2) and the braking force (B), and it is easy to increase the braking force (B). Since the force (f2) is not affected, it is possible to increase the braking force (B) while suppressing an increase in the holding force (F2) of the paper tube 21 during braking.

  The braking force (B) applied to the holding member 31 can be adjusted according to the package diameter of the winding package 9. That is, a sensor for detecting the package diameter of the winding package 9 is provided, and the amount of operating air supplied to the package brake 11 is adjusted by the electromagnetic valve 24 based on the detection value from the sensor, so that the braking force (B) Can be adjusted to large or small. According to this, when the package diameter is small, it is determined that the weight of the winding package 9 is small and a small braking force is applied, and when the package diameter is large, it is determined that the weight of the winding package 9 is large. Thus, the winding package 9 can be stopped by applying the braking force (B) without excessive or insufficient so as to apply a large braking force. Therefore, the load (holding force (F2)) applied to the paper tube 21 can be prevented from becoming excessive, and the paper tube 21 can be effectively prevented from being damaged.

  The braking force (B) applied to the holding member 31 may be adjusted by the electromagnetic valve 24 in accordance with the number of rotations of the winding package 9. According to this, when the rotational speed of the winding package 9 is small, a small braking force (B) is given, and conversely, when the rotational speed of the winding package 9 is large, a larger braking force (B). The winding package 9 can be stopped by applying the braking force (B) without excess or deficiency. Therefore, also in this case, the load (holding force (F2)) applied to the paper tube 21 can be prevented from being excessive, and the paper tube 21 can be effectively prevented from being damaged.

  FIG. 9 shows a modification of the present invention. There, the first spring 33 as the pressing element in the first embodiment is eliminated, and the pressing force (A) is obtained by the working air. That is, a third air chamber 90 for applying a pressing force to the holding member 31 is provided at the rear end portion of the apparatus, and operating air is supplied from the compressor 20 to the third air chamber 90 via the electromagnetic valve 24a. By supplying, the pressing force (A) for pressing the holding member 31 forward is applied. According to this, normally, the working air is supplied only to the third air chamber 90, and the paper tube 21 is held by the holding member 31 by the pressing force (A) derived from the working air. Further, at the time of braking, both electromagnetic valves 24a and 24b are opened to supply operating air to the first to third air chambers 64, 65, and 90. Other points are the same as in the first embodiment.

In the above embodiment, both the air chambers 64 and 65 are communicated with each other through the clearance gap E. However, the present invention is not limited to this, and each air chamber 64 and 65 is provided with an air inlet, The working air may be supplied to the chambers 64 and 65 separately.
In the above embodiment, the first and second acting forces are obtained by the working air. However, the present invention is not limited to this, and the acting force may be obtained by, for example, hydraulic pressure.

1 is a schematic configuration diagram of a package brake according to a first embodiment of the present invention. It is a schematic block diagram of an automatic winder. It is a figure for demonstrating the holding mechanism of a winding package. It is a figure for demonstrating the retention strength in the normal state of the package brake which concerns on 1st Embodiment. It is a figure for demonstrating the holding force and braking force at the time of the braking of the package brake which concerns on 1st Embodiment. It is a schematic block diagram of the package brake which concerns on 2nd Embodiment of this invention. It is a figure for demonstrating the retention strength in the normal state of the package brake which concerns on 2nd Embodiment. It is a figure for demonstrating the holding force and braking force at the time of the braking of the package brake which concerns on 2nd Embodiment. It is a schematic block diagram which shows the package brake which concerns on the modification of this invention. It is a schematic block diagram which shows the package brake which concerns on the former.

Explanation of symbols

11 Package brake 21 Paper tube 30 Housing 31 Holding member 32 Actuating member 33 Pressing element (first spring)
46 Friction material 50 Shaft 52 Paper tube support (bearing center)
64 First fluid chamber (first air chamber)
65 Second fluid chamber (second air chamber)
71 Inner sleeve 72 Outer sleeve 80 Shaft 81 Brake shoe

Claims (7)

A package brake for applying a braking force derived from fluid pressure to a winding package composed of a paper tube and a thread wound on the surface of the paper tube,
A holding member that holds one side surface of the paper tube and an operation member that contacts the holding member and applies a braking force are assembled in a cylindrical housing,
The holding member and the actuating member are configured to be able to move independently with respect to the housing in the forward direction toward the paper tube and the backward direction away from the paper tube when receiving the working fluid,
In a state where no braking force is applied, the holding member is pressed forward by the pressing element,
By receiving the supply of the working fluid, a first acting force that is directed forward toward the paper tube and a second acting force that exerts a braking force between the actuating member and the holding member are the actuating. A package brake characterized by being applied to a member and a holding member. A cylindrical housing, a hollow cylindrical operating member mounted on the housing so as to be movable in the front-rear direction, and a holding member mounted on the housing and the operating member so as to be movable in the front-rear direction.
The holding member includes a shaft that is pivotally supported by the operating member, and a paper tube holding portion that is formed to protrude from a front end of the shaft, and the paper tube holding portion accompanies the paper tube with the shaft as a rotation axis. It is configured to be rotatable,
In a normal state, the shaft receives the forward pressing force from the pressing element, thereby pressing the front surface of the paper tube holding portion against one side surface of the paper tube to hold the paper tube,
When the operating member moves relative to the holding member by the second acting force, the friction material provided on the front side of the operating member is pressed against the paper tube holding portion, and the braking force on the holding member is increased. It has come to be demonstrated,
The package brake according to claim 1, further comprising: a first fluid chamber for obtaining the first acting force by supplying a working fluid; and a second fluid chamber for obtaining the second acting force. A cylindrical housing, a hollow cylindrical holding member movably mounted on the housing, and an operating member movably mounted on the housing and the holding member;
The actuating member includes a shaft that is pivotally supported by the holding member, and a brake shoe that is formed to protrude from a front end of the shaft. A part of the brake shoe exhibits a braking force against the holding member. Friction material is provided,
The holding member includes an inner sleeve assembled in the housing, an outer sleeve held in an outer fitting manner in the housing portion, and a paper tube holding portion for holding a paper tube, It is configured to be able to rotate along with the paper tube with the shaft of the operating part as a rotation axis,
In a normal state, when the rear end portion of the inner sleeve receives a forward pressing force from the pressing element, the front surface of the paper tube holding portion is pressed against one side surface of the paper tube to hold the paper tube. And
When the operating member moves relative to the holding member by the second acting force, the friction material is pressed against the paper tube holding portion, and a braking force is exerted on the holding member. And
A first fluid chamber is provided between the housing and the holding member to obtain the first acting force by receiving a supply of working fluid, and between the operating member and the holding member, The package brake according to claim 1, wherein a second fluid chamber for obtaining the second acting force is provided.   The package brake according to claim 2 or 3, wherein the first fluid chamber and the second fluid chamber communicate with each other.   The package brake according to any one of claims 1 to 4, wherein a braking force applied to the holding member can be adjusted in accordance with a package diameter of the winding package.   The package brake according to any one of claims 1 to 4, wherein a braking force applied to the holding member can be adjusted in accordance with a rotational speed of the winding package.   An automatic winder comprising the package brake according to any one of claims 1 to 6.

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