JP6933866B2 - Bar material feeder - Google Patents

Description

The present invention relates to a bar material feeding device of a bar material feeder, and more specifically, to an improvement of a bar material feeding device arranged on a bar material feeding axis of a bar material feeder. ..

There is known a bar material feeder configured to automatically supply a relatively long bar material to an automatic lathe such as an NC lathe. This type of bar supply machine is equipped with a bar material supply means for supplying the bar material to the automatic lathe, and the bar material supply means is a bar material supply such as a feed arrow that feeds the bar material toward the automatic lathe. It includes a feeding device and a driving device for a rod material feeding device composed of a drive motor, a chain, and the like.

The driving device generally applies a driving force or a thrust force (thrust force) in the forward direction to the bar material feeding device, whereby the bar material feeding device is subjected to, for example, according to the product processing process of an automatic lathe. Supply the material to the automatic lathe.

The bar feed device of the bar feeder generally includes a hollow cylindrical finger chuck that grips the rear end of the bar as a work or material. The finger chuck is rotatably attached to the tip end or front end portion of the bar material feeding device. Then, the rear end portion of the bar is inserted into the hollow portion of the finger chuck and is gripped by the finger chuck.

FIG. 13 is a schematic side view showing the configuration of this type of bar feeding device. The feed arrow 1 constituting the bar feed device is a rod portion 2 arranged on the bar feed axis XX of the bar feed machine, and a finger chuck 4 attached to the front end portion of the rod portion 2. And have.

The blade portion 3 provided at the rear end portion of the feed arrow 1 is locked to an endless chain C (which may be a belt, a pulley, or the like) constituting a drive device for a feed member device. Further, a rotatable connecting member 10 called a chuck joint is interposed between the finger chuck 4 and the rod portion 2.

Then, the rear end portion of the bar member W is fitted into the finger chuck 4, and is thereby gripped by the finger chuck 4. When the bar W gripped by the collet chuck of the spindle of the NC automatic lathe rotates at high speed, the connecting member 10 rotatably supports the finger chuck 4, that is, the finger chuck 4 follows the rotation of the bar W. It is rotatable.

The finger chuck 4 that can be attached to the feed arrow 1 generally has a cylindrical elastic body 30 such as urethane resin, as disclosed in Japanese Patent Application Laid-Open No. 57-91502 (Patent Document 1). ing. The elastic body 30 elastically grips the rear end portion of the rod member W inserted into the finger chuck 4.

According to the present inventor, a cylindrical elastic body such as urethane resin in a bar gripping member (finger chuck) expands when the bar W is inserted, and the bar gripping member (finger chuck) expands when the bar rotates. ) May be "carried around", and in that case, it has been found that the cylindrical elastic body may be subjected to a torsional load, and the cylindrical elastic body may be undesirably damaged.

On the other hand, according to the present inventor, the cylindrical elastic body is covered against the sliding resistance between the cylindrical elastic body and the main body (usually made of metal) of the bar material gripping member (finger chuck). The sliding resistance between the provided cylindrical metal cover and the main body (usually made of metal) of the bar gripping member (finger chuck) is as low as that by using an appropriate amount of lubricating oil or the like. It was found that it can be done.

The present invention has been devised based on the above background. An object of the present invention is to provide a bar material feeding device in which deformation or damage to a cylindrical elastic body such as urethane resin in a bar material gripping member (finger chuck) is effectively suppressed.

The present invention includes a bar gripping member that grips the rear end portion of the bar, a rod portion that advances when the bar is fed, and the bar gripping member and rod so as to rotatably support the bar gripping member. In a rod material feeding device of a rod material feeder that includes a connecting member interposed between the portions and rotatably supports a rod material that rotates during cutting, the connecting member is the rod material gripping member. It has a rotating portion that integrally supports the rod portion, a fixing portion connected to the rod portion, and a rotating means for connecting the rotating portion and the fixed portion so as to be relatively rotatable. Has a grip portion having a hollow portion and a finger member rotatably housed in the hollow portion of the grip portion and grips the rear end portion of the rod member. A rod material feeder of a rod material feeder characterized by having a tubular elastic body that grips the rear end portion of the rod material and a tubular metal body that covers the tubular elastic body. It is a feeding device.

According to the present invention, since the tubular elastic body is covered with the tubular metal body, damage to the tubular elastic body is effectively suppressed. On the other hand, it was confirmed that the sliding resistance between the tubular metal body covering the tubular elastic body and the grip portion of the bar gripping member can be kept sufficiently low by using an appropriate amount of lubricating oil or the like. rice field. As a result, it is confirmed that the rod can be stably supported and fed even when the rod rotates at high speed due to the rotation accompanying the sliding between the two and the rotation allowed by the rotating means of the connecting member. Was done.

Preferably, the tubular elastic body is a cylindrical elastic body, and the tubular metal body is a cylindrical metal body.

Further, in the present invention, the bar gripping member for gripping the rear end portion of the bar, the rod portion that advances when the bar is fed, and the bar gripping member so as to rotatably support the bar gripping member. In a rod material feeding device of a rod material feeder, which includes a connecting member interposed between the rod portion and a rod material feeding machine that rotatably supports a rod material that rotates during cutting, the connecting member is the rod material. It has a rotating portion that integrally supports the gripping member, a fixing portion connected to the rod portion, and a rotating means for connecting the rotating portion and the fixed portion so as to be relatively rotatable, and the rod member. The grip member has a grip portion having a hollow portion and a finger member rotatably housed in the hollow portion of the grip portion and grips the rear end portion of the rod member, and the finger member. Has a tubular metal body that grips the rear end portion of the rod member, and the tubular metal body has a through hole penetrating in a direction perpendicular to the axial direction and an axial direction from the through hole. It is a bar material feeding device of a bar material feeder characterized by being provided with a slit hole extending to the front end of the rod material.

According to the present invention, since the structure does not require a tubular elastic body, the problem of damage to such an elastic body is fundamentally released. On the other hand, it was confirmed that the tubular metal body can be elastically deformed due to the presence of the slit holes, so that the rear end portion of the bar can be elastically and stably gripped. Further, it was confirmed that the sliding resistance between the tubular metal body and the gripping portion of the bar gripping member can be maintained sufficiently low by using an appropriate amount of lubricating oil or the like in combination. As a result, it is confirmed that the rod can be stably supported and fed even when the rod rotates at high speed due to the rotation accompanying the sliding between the two and the rotation allowed by the rotating means of the connecting member. Was done.

Preferably, the tubular metal body is a cylindrical metal body. Further, preferably, the slit holes are a pair of facing slit holes. Alternatively, preferably, the slit holes are three or more slit holes (referred to as 30%, 40%, ..., Etc.) that are evenly distributed in the circumferential direction. The slit hole is generally linear along the axial direction, but may extend diagonally with respect to the axial direction.

Further, the present invention comprises a rod material gripping member that grips a first rod material having a first diameter or a rear end portion of a second rod material having a second diameter different from the first diameter, and a rod material gripping member at the time of feeding the rod material. A first rod that includes a rod portion that moves forward and a connecting member that is interposed between the rod gripping member and the rod portion so as to rotatably support the rod gripping member, and that rotates during cutting. Alternatively, in the rod material feeding device of the rod material feeder that rotatably supports the second rod material, the connecting member is connected to the rotating portion that integrally supports the rod material gripping member and the rod portion. a fixed portion, wherein and the rotating portion and the fixed portion comprises a rotating means for relatively rotatably connected, and the bar gripping member includes a grip portion having a hollow portion, the hollow portion of the grip portion A first finger member that is rotatably housed inside and can grip the rear end of the first bar, and a rear end of the second bar that is rotatably housed in the hollow portion of the grip. It has a second finger member capable of gripping the portion, and each of the first finger member and the second finger member grips the first bar member or the rear end portion of the second bar member. It has a tubular metal body, and each tubular metal body is provided with a through hole penetrating in a direction perpendicular to the axial direction and a slit hole extending from the through hole to the front end in the axial direction. It is a bar material feeding device of a bar material feeder, which is characterized in that it is used.

According to the present invention, since the structure does not require a tubular elastic body, the problem of damage to such an elastic body is fundamentally released. On the other hand, it was confirmed that each tubular metal body can be elastically deformed due to the presence of slit holes, so that the rear end portion of the first bar or the second bar can be elastically and stably gripped. Was done. Further, it was confirmed that the sliding resistance between each tubular metal body and the gripping portion of the bar gripping member can be maintained sufficiently low by using an appropriate amount of lubricating oil or the like in combination. As a result, the rotation accompanying the sliding between the two and the rotation allowed by the rotating means of the connecting member stably support the rod even when the first rod or the second rod rotates at high speed. It was confirmed that it could be shipped. From the above, it was confirmed that these can be selectively used for the two types of the first bar and the second bar having different diameters.

Further, the present invention comprises a rod material gripping member that grips a first rod material having a first diameter or a rear end portion of a second rod material having a second diameter different from the first diameter, and a rod material gripping member at the time of feeding the rod material. A first rod that includes a rod portion that moves forward and a connecting member that is interposed between the rod gripping member and the rod portion so as to rotatably support the rod gripping member, and that rotates during cutting. Alternatively, in the rod material feeding device of the rod material feeder that rotatably supports the second rod material, the connecting member is connected to the rotating portion that integrally supports the rod material gripping member and the rod portion. The rod material gripping member includes a fixing portion and a rotating means for connecting the rotating portion and the fixing portion so as to be relatively rotatable, and the rod member gripping member includes a grip portion having a hollow portion and the hollow portion of the grip portion. A first finger member that is rotatably housed inside and can grip the rear end of the first bar, and a rear end of the second bar that is rotatably housed in the hollow portion of the grip. It has a second finger member capable of gripping the portion, and each of the first finger member and the second finger member grips the first bar member or the rear end portion of the second bar member. It is a bar material feeding device of a bar material feeder characterized by having a tubular elastic body and a tubular metal body covering the tubular elastic body.

According to the present invention, since the tubular elastic body is covered with the tubular metal body in each of the first finger member and the second finger member, it is effective that the tubular elastic body is damaged. It is suppressed. On the other hand, it was confirmed that the sliding resistance between the tubular metal body covering the tubular elastic body and the grip portion of the bar gripping member can be kept sufficiently low by using an appropriate amount of lubricating oil or the like. rice field. As a result, the rotation accompanying the sliding between the two and the rotation allowed by the rotating means of the connecting member stably support the rod even when the first rod or the second rod rotates at high speed. It was confirmed that it could be shipped. From the above, it was confirmed that these can be selectively used for the two types of the first bar and the second bar having different diameters.

Further, the present invention comprises a rod material gripping member that grips a first rod material having a first diameter or a rear end portion of a second rod material having a second diameter different from the first diameter, and a rod material gripping member at the time of feeding the rod material. A first rod that is provided with a rod portion that moves forward and a connecting member that is interposed between the rod gripping member and the rod portion so as to rotatably support the rod gripping member, and that rotates during cutting. Alternatively, in the rod material feeding device of the rod material feeder that rotatably supports the second rod material, the connecting member is connected to the rotating portion that integrally supports the rod material gripping member and the rod portion. a fixed portion, wherein and the rotating portion and the fixed portion comprises a rotating means for relatively rotatably connected, and the bar gripping member includes a grip portion having a hollow portion, the hollow portion of the grip portion A first finger member that is rotatably housed inside and can grip the rear end of the first bar, and a rear end of the second bar that is rotatably housed in the hollow portion of the grip. It has a second finger member capable of gripping the portion, and one of the first finger member and the second finger member grips the first bar member or the rear end portion of the second bar member. It has a tubular metal body, and the tubular metal body is provided with a through hole penetrating in a direction perpendicular to the axial direction and a slit hole extending from the through hole to the front end in the axial direction. The other of the first finger member and the second finger member is a tubular elastic body that grips the first bar member or the rear end portion of the second bar member, and the tubular elastic body. It is a bar material feeding device of a bar material feeder characterized by having a tubular metal body to cover the rod material.

According to the present invention, since one of the first finger member and the second finger member does not require a tubular elastic body, the problem of damage to such elastic body is fundamentally released. .. On the other hand, since the tubular metal body can be elastically deformed due to the presence of slit holes, it is possible to elastically and stably grip one of the rear ends of the first rod and the second rod. confirmed. Further, it was confirmed that the sliding resistance between the tubular metal body and the gripping portion of the bar gripping member can be maintained sufficiently low by using an appropriate amount of lubricating oil or the like in combination. As a result, the rotation accompanying the sliding between the two and the rotation allowed by the rotating means of the connecting member make the rod stable even when one of the first rod and the second rod rotates at high speed. It was confirmed that it can be shipped in support of. Further, since the tubular elastic body is covered with the tubular metal body on the other side of the first finger member and the second finger member, damage to the tubular elastic body is effectively suppressed. .. On the other hand, it was confirmed that the sliding resistance between the tubular metal body covering the tubular elastic body and the grip portion of the bar gripping member can be kept sufficiently low by using an appropriate amount of lubricating oil or the like. rice field. As a result, the rotation accompanying the sliding between the two and the rotation allowed by the rotating means of the connecting member make the rod stable even when the other of the first rod and the second rod rotates at high speed. It was confirmed that it can be shipped in support of. From the above, it was confirmed that these can be selectively used for the two types of the first bar and the second bar having different diameters.

According to one aspect of the present invention, since the tubular elastic body is covered with the tubular metal body, damage to the tubular elastic body is effectively suppressed. On the other hand, it was confirmed that the sliding resistance between the tubular metal body covering the tubular elastic body and the grip portion of the bar gripping member can be kept sufficiently low by using an appropriate amount of lubricating oil or the like. rice field. As a result, it is confirmed that the rod can be stably supported and fed even when the rod rotates at high speed due to the rotation accompanying the sliding between the two and the rotation allowed by the rotating means of the connecting member. Was done.

According to another aspect of the present invention, since the configuration does not require a tubular elastic body, the problem of damage to such an elastic body is fundamentally released. On the other hand, it was confirmed that the tubular metal body can be elastically deformed due to the presence of the slit holes, so that the rear end portion of the bar can be elastically and stably gripped. Further, it was confirmed that the sliding resistance between the tubular metal body and the gripping portion of the bar gripping member can be maintained sufficiently low by using an appropriate amount of lubricating oil or the like in combination. As a result, it is confirmed that the rod can be stably supported and fed even when the rod rotates at high speed due to the rotation accompanying the sliding between the two and the rotation allowed by the rotating means of the connecting member. Was done.

According to another aspect of the present invention, since the configuration does not require a tubular elastic body, the problem of damage to such an elastic body is fundamentally released. On the other hand, it was confirmed that each tubular metal body can be elastically deformed due to the presence of slit holes, so that the rear end portion of the first bar or the second bar can be elastically and stably gripped. Was done. Further, it was confirmed that the sliding resistance between each tubular metal body and the gripping portion of the bar gripping member can be maintained sufficiently low by using an appropriate amount of lubricating oil or the like in combination. As a result, the rotation accompanying the sliding between the two and the rotation allowed by the rotating means of the connecting member stably support the rod even when the first rod or the second rod rotates at high speed. It was confirmed that it could be shipped. From the above, it was confirmed that these can be selectively used for the two types of the first bar and the second bar having different diameters.

According to another aspect of the present invention, since the tubular elastic body is covered with the tubular metal body in each of the first finger member and the second finger member, the tubular elastic body is damaged. Is effectively suppressed. On the other hand, it was confirmed that the sliding resistance between the tubular metal body covering the tubular elastic body and the grip portion of the bar gripping member can be kept sufficiently low by using an appropriate amount of lubricating oil or the like. rice field. As a result, the rotation accompanying the sliding between the two and the rotation allowed by the rotating means of the connecting member stably support the rod even when the first rod or the second rod rotates at high speed. It was confirmed that it could be shipped. From the above, it was confirmed that these can be selectively used for the two types of the first bar and the second bar having different diameters.

According to another aspect of the present invention, since one of the first finger member and the second finger member does not require a tubular elastic body, it is fundamental from the problem that such an elastic body is damaged. Will be released to. On the other hand, since the tubular metal body can be elastically deformed due to the presence of slit holes, it is possible to elastically and stably grip one of the rear ends of the first rod and the second rod. confirmed. Further, it was confirmed that the sliding resistance between the tubular metal body and the gripping portion of the bar gripping member can be maintained sufficiently low by using an appropriate amount of lubricating oil or the like in combination. As a result, the rotation accompanying the sliding between the two and the rotation allowed by the rotating means of the connecting member make the rod stable even when one of the first rod and the second rod rotates at high speed. It was confirmed that it can be shipped in support of. Further, since the tubular elastic body is covered with the tubular metal body on the other side of the first finger member and the second finger member, damage to the tubular elastic body is effectively suppressed. .. On the other hand, it was confirmed that the sliding resistance between the tubular metal body covering the tubular elastic body and the grip portion of the bar gripping member can be kept sufficiently low by using an appropriate amount of lubricating oil or the like. rice field. As a result, the rotation accompanying the sliding between the two and the rotation allowed by the rotating means of the connecting member make the rod stable even when the other of the first rod and the second rod rotates at high speed. It was confirmed that it can be shipped in support of. From the above, it was confirmed that these can be selectively used for the two types of the first bar and the second bar having different diameters.

It is a schematic side view which shows the bar material feeding device of the bar material feeder which concerns on 1st Embodiment of this invention. It is a vertical sectional view of the main part of the bar material feeding device which concerns on 1st Embodiment of this invention. It is sectional drawing of the cylindrical metal body of FIG. It is an end view of the cylindrical metal body of FIG. It is a schematic side view which shows the bar material feeding device of the bar material feeder which concerns on 2nd Embodiment of this invention. It is a vertical sectional view of the main part of the bar material feeding device which concerns on 2nd Embodiment of this invention. It is sectional drawing of the finger member of FIG. It is an end view of the finger member of FIG. It is a schematic side view which shows the bar material feeding device of the bar material feeder which concerns on 3rd Embodiment of this invention. It is a vertical sectional view of the main part of the bar material feeding device which concerns on 3rd Embodiment of this invention. It is a schematic side view which shows the bar material feeding device of the bar material feeder which concerns on 4th Embodiment of this invention. It is a vertical sectional view of the main part of the bar material feeding device which concerns on 4th Embodiment of this invention. It is a schematic side view which shows the structure of the conventional bar material feeding apparatus.

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

<First Embodiment>
FIG. 1 is a schematic side view showing a bar material feeding device of the bar material feeder according to the first embodiment of the present invention, and FIG. 2 is a schematic side view of the bar material feeding device according to the first embodiment of the present invention. It is a vertical sectional view of a main part, FIG. 3 is a sectional view of the cylindrical metal body of FIG. 2, and FIG. 4 is an end view of the cylindrical metal body of FIG.

As shown in FIGS. 1 to 4, the bar material feeding device of the bar material feeder according to the first embodiment of the present invention is a feed arrow 101. The feed arrow 101 includes a rod portion 102 arranged on the rod material feeding axis XX of the rod material feeder, a blade portion 103 integrally fixed to the rear end portion of the rod portion 102, and a rod portion. A finger chuck 104 (rod material gripping member) attached to the front end portion of the 102 is provided.

The blade portion 103 is locked to an endless chain C constituting a feed arrow driving means or a propulsion means of the bar material feeder. The endless chain C is wound around a drive sprocket and a floating sprocket (not shown) rotatably attached to a frame (not shown) of a bar feeder. The drive sprocket is operatively connected to a power source (not shown) such as an electric motor, and rotates from the operation of the power source to rotate the endless chain C. As the endless chain C rotates, the blade portion 103 locked to the traveling zone portion of the endless chain C moves forward or backward. Instead of the endless chain C, a belt, a pulley, or the like may be used.

The finger chuck 104 is supported by the rod portion 102 via a chuck joint 110 (connecting member) arranged in the front end region of the rod portion 102. The chuck joint 110 is fixed to the rod portion 102 and rotatably supports the finger chuck 104.

The finger chuck 104 has a grip portion 105 into which the rear end portion of the bar member W (outer diameter 1.0 mm in this example) can be inserted, and the finger member 130 is rotatably housed in the grip portion 105. The rear end portion of the bar member W is gripped. The finger member 130 has a tubular elastic body 131 and a tubular metal body 132 that covers the tubular elastic body 131.

In the present embodiment, the tubular elastic body 131 is made of a cylindrical urethane member, and as shown in FIG. 2, for example, has an outer diameter of 3.4 mm, an inner diameter of 0.8 mm, and a length of 9.5 mm, and has one end. A truncated conical opening 131a having an apex angle of 60 ° and an opening diameter of 2.5 mm is provided on the side to communicate with the internal space 131c. The tubular metal body 132 is made of a cylindrical steel member, a stainless steel material, or the like, and has, for example, an outer diameter of 4.0 mm, an inner diameter of 3.4 mm, and a length of 9.5 mm, as shown in FIGS. 3 and 4. .. The elastic body 131 and the metal body 132 can be fixed to each other by, for example, bonding, or can be integrally molded by a molding method called "urethane molding".

As shown in FIG. 2, the chuck joint 110 has a rotating member 112 (rotating portion) arranged in the front portion and a fixing member 111 (fixing portion) arranged in the rear portion. The fixing member 111 of the chuck joint 110 is integrally fixed to the front end of the rod portion 102, and the rotating member 112 of the chuck joint 110 integrally supports the finger chuck 104.

More specifically, the grip portion 105 of the finger chuck 104 is provided with a truncated conical opening 105a having a diameter of 5.0 mm and a length of 12.5 mm, an apex angle of 60 °, and an opening diameter of 4.5 mm on the tip side. It communicates with a cylindrical space 105c having an inner diameter of 4.05 mm via a connecting portion 105b having an inner diameter of 2.2 mm and a length of 1.0 mm.

The finger member 130 is rotatably housed inside the cylindrical space 105c. As a result, the rear end portion of the rod W can be received by the truncated conical opening 105a and the connecting portion 105b of the grip portion 105 and the truncated conical opening 131a and the internal space 131c of the elastic body 131. There is.

In this example, the inner peripheral wall surface of the internal space 131c of the elastic body 131 is formed in a smooth cylindrical surface shape without steps or steps. However, if desired, a plurality of rib-shaped protrusions extending in the axial direction and protruding inward in the radial direction may be formed on the inner peripheral wall surface. The diameter of the inner peripheral wall surface or the diameter of the inscribed circle at the tip of the rib-shaped protrusion is set to be slightly smaller than the outer diameter of the bar member W.

The front end of the finger member 130 faces the rear end of the flange portion 105f (the portion forming the connecting portion 105b) of the grip portion 105, and the forward movement is restricted by the flange portion 105f. On the other hand, the rear end of the finger member 130 is also rotatable with respect to the front end of the rotating member 112 via a rotating body such as a steel ball housed in the region 135. However, the rotating body may be omitted. Alternatively, when the diameter of the rod is relatively large, a thrust bearing may be provided instead of the rotating body.

The rotating member 112 of the chuck joint 110 has a hollow cylindrical portion 112a having an outer diameter smaller than the outer diameter of the finger chuck 104, and a flange portion 112f. The shaft member 113 is inserted into the rotating member 112 and is integrally connected to the rotating member 112 via a pin 114.

The rear portion of the shaft member 113 is inserted into the front opening 111a of the fixing member 111. The fixing member 111 is a cylindrical hollow member having substantially the same outer diameter as the flange portion 112f of the rotating member 112, and an annular shoulder portion 116 is formed in the hollow portion of the fixing member 111. The rear end enlarged portion 115 of the shaft member 113 can be slidably contacted with the shoulder portion 116.

The rear surface of the rear end enlarged portion 115 is provided with a concave portion that complements the outer shape of the steel ball 117 and is in sliding contact with the steel ball 117. Steel ball support portions 118 are arranged rearward from the rear end expansion portion 115 at predetermined intervals, and three steel balls 117 arranged in series are located between the rear end expansion portion 115 and the steel ball support portion 118. It is mounted so that it can rotate freely.

In addition, a male screw portion (not shown) protruding forward from the front end surface of the rod portion 102 is screwed into the female screw portion 119 of the chuck joint 110 and fastened.

Next, the operation of the feed arrow 101 of the present embodiment will be described.

The rear end of the bar W arranged on the bar feeding axis XX is the truncated conical opening 105a and the connecting portion 105b of the grip portion 105, the truncated conical opening 131a of the elastic body 131, and the internal space. It is accepted by 131c and fitted into the internal space 131c. The inner peripheral wall surface of the elastic body 131 is slightly enlarged in diameter, and the rear end surface of the bar member W is elastically gripped by the elastic restoring force. Thus, the rear end portion of the rod member W is elastically gripped by the finger member 130 of the finger chuck 104.

The front end portion of the bar member W is inserted into, for example, an NC automatic lathe (not shown), and is inserted into the spindle internal pipe of the NC automatic lathe. The spindle of the NC automatic lathe grips the front end portion of the bar member W with a collet chuck, and then rotates the bar member W at high speed and cuts the outer peripheral portion of the front end of the bar member W with a cutting tool.

The endless chain C continuously applies a predetermined propulsive force or driving force acting forward to the feed arrow 101, but the shaft member 113 and the rotating member 112 with respect to the fixing member 111 fixed to the rod portion 102. Is rotatable, and the finger member 130 is further rotatable with respect to the grip portion 105 fixed to the rotating member 112. Therefore, the rear end portion of the rod member W that rotates at high speed is freely rotated by the feed arrow 101. It is in a state of being supported as much as possible.

According to the feed arrow 101 (bar material feeding device) of the present embodiment as described above, since the cylindrical elastic body 131 is covered with the cylindrical metal body 132, the cylindrical elastic body 131 is damaged. Is effectively suppressed.

Further, the present inventor more preferably slides the sliding resistance between the cylindrical metal body 132 covering the cylindrical elastic body 131 and the grip portion 105 by using an appropriate amount of lubricating oil or the like in combination. It was confirmed that it can be kept sufficiently low by applying a surface treatment (manganese phosphate coating treatment, nitriding treatment, etc.) with low resistance, excellent wear resistance, and high oil retention. As a result, the rotation accompanying the sliding between the two and the rotating means of the chuck joint 110 (specifically, the three steel balls 117 and the rear end expanding portion 115 and the steel ball supporting portion 118 supporting them) allow it. By rotation, it was confirmed that the bar W can be stably supported and fed even when the bar W rotates at high speed.

<Second Embodiment>
FIG. 5 is a schematic side view showing a bar material feeding device of the bar material feeder according to the second embodiment of the present invention, and FIG. 6 is a schematic side view of the bar material feeding device according to the second embodiment of the present invention. It is a vertical sectional view of a main part, FIG. 7 is a sectional view of the finger member of FIG. 6, and FIG. 8 is an end view of the finger member of FIG.

As shown in FIGS. 5 to 8, the bar material feeding device of the bar material feeder according to the second embodiment of the present invention is a feed arrow 201. The feed arrow 201 also has a rod portion 202 arranged on the rod material feeding axis XX of the rod material feeder, a blade portion 203 integrally fixed to the rear end portion of the rod portion 202, and a rod portion. It is provided with a finger chuck 204 (rod material gripping member) attached to the front end portion of 202.

The blade portion 203 is locked to the endless chain C constituting the feed arrow driving means or the propulsion means of the bar material feeder. The endless chain C is wound around a drive sprocket and a floating sprocket (not shown) rotatably attached to a frame (not shown) of a bar feeder. The drive sprocket is operatively connected to a power source (not shown) such as an electric motor, and rotates from the operation of the power source to rotate the endless chain C. As the endless chain C rotates, the blade portion 203 locked to the traveling zone portion of the endless chain C moves forward or backward. Instead of the endless chain C, a belt, a pulley, or the like may be used.

The finger chuck 204 is supported by the rod portion 202 via a chuck joint 210 (connecting member) arranged in the front end region of the rod portion 202. The chuck joint 210 is fixed to the rod portion 202 and rotatably supports the finger chuck 204.

The finger chuck 204 has a grip portion 205 into which the rear end portion of the bar member W (outer diameter 2.0 mm in this example) can be inserted, and the finger member 230 is rotatably housed in the grip portion 205. The rear end portion of the bar member W is gripped. The finger member 230 has a tubular metal body 232. The tubular metal body 232 is provided with a through hole 232t penetrating in a direction perpendicular to the axial direction and a pair of opposed slit holes 232s extending from the through hole 232t to the front end along the axial direction. ..

In the present embodiment, the tubular metal body 232 is composed of a cylindrical steel member, SUJ, SCM, etc., and as shown in FIGS. 7 and 8, for example, an outer diameter of 4.0 mm, an inner diameter of 2.0 mm, and a length. The diameter is 9.5 mm, and a truncated conical opening 232a having an apex angle of 118 ° and an opening diameter of 3.6 mm is provided on one end side to communicate with the internal space 232c. The through hole 232t is formed as a hole having a diameter of 2.0 mm centered at a position 2 mm from the other end side, and the width of the facing slit hole 232s is 0.5 mm.

As shown in FIG. 6, the chuck joint 210 has a rotating member 212 (rotating portion) arranged in the front portion and a fixing member 211 (fixing portion) arranged in the rear portion. The fixing member 211 of the chuck joint 210 is integrally fixed to the front end of the rod portion 202, and the rotating member 212 of the chuck joint 210 integrally supports the finger chuck 204.

More specifically, the grip portion 205 of the finger chuck 204 is provided with a truncated conical opening 205a having a diameter of 5.0 mm and a length of 12.5 mm, an apex angle of 60 °, and an opening diameter of 4.5 mm on the tip side. It communicates with a cylindrical space 205c having an inner diameter of 4.05 mm via a connecting portion 205b having an inner diameter of 2.2 mm and a length of 1.0 mm.

The finger member 230 is rotatably housed inside the cylindrical space 205c. As a result, the rear end portion of the bar W can be received by the truncated conical opening 205a and the connecting portion 205b of the grip portion 205, and the truncated conical opening 232a and the internal space 232c of the metal body 232. There is.

In this example, the inner peripheral wall surface of the internal space 232c of the metal body 232 is formed in a smooth cylindrical surface shape without steps or steps. However, if desired, a plurality of rib-shaped protrusions extending in the axial direction and protruding inward in the radial direction may be formed on the inner peripheral wall surface. The diameter of the inner peripheral wall surface or the diameter of the inscribed circle at the tip of the rib-shaped protrusion is set to be slightly smaller than the outer diameter of the bar member W.

The front end of the finger member 230 faces the rear end of the flange portion 205f (the portion forming the connecting portion 205b) of the grip portion 205, and the forward movement is restricted by the flange portion 205f. On the other hand, the rear end of the finger member 230 is also rotatable with respect to the front end of the rotating member 212 via a rotating body such as a steel ball housed in the region 235. However, the rotating body may be omitted. Alternatively, when the diameter of the rod is relatively large, a thrust bearing may be provided instead of the rotating body.

The rotating member 212 of the chuck joint 210 has a hollow cylindrical portion 212a having an outer diameter smaller than the outer diameter of the finger chuck 204, and a flange portion 212f. The shaft member 213 is inserted into the rotating member 212 and is integrally connected to the rotating member 212 via a pin 214.

The rear portion of the shaft member 213 is inserted into the front opening 211a of the fixing member 211. The fixing member 211 is a cylindrical hollow member having substantially the same outer diameter as the flange portion 212f of the rotating member 212, and the hollow portion of the fixing member 211 is formed with an annular shoulder portion 216. The rear end enlarged portion 215 of the shaft member 213 can be slidably contacted with the shoulder portion 216.

The rear surface of the rear end enlarged portion 215 is provided with a concave portion that complements the outer shape of the steel ball 217 and is in sliding contact with the steel ball 217. Steel ball support portions 218 are arranged rearward from the rear end expansion portion 215 at predetermined intervals, and three steel balls 217 arranged in series are provided between the rear end expansion portion 215 and the steel ball support portion 218. It is mounted so that it can rotate freely.

In addition, a male screw portion (not shown) protruding forward from the front end surface of the rod portion 202 is screwed into the female screw portion 219 of the chuck joint 210 and fastened.

Next, the operation of the feed arrow 201 of the present embodiment will be described.

The rear end of the bar W arranged on the bar feeding axis XX is the truncated conical opening 205a and the connecting portion 205b of the grip portion 205, the truncated conical opening 232a of the metal body 232, and the internal space. Accepted by 232c and fitted into the interior space 232c. The inner peripheral wall surface of the metal body 232 has a slightly enlarged diameter, and its elastic restoring force elastically grips the rear end surface of the rod member W. Thus, the rear end portion of the bar member W is elastically gripped by the finger member 230 of the finger chuck 204.

The front end portion of the bar member W is inserted into, for example, an NC automatic lathe (not shown), and is inserted into the spindle internal pipe of the NC automatic lathe. The spindle of the NC automatic lathe grips the front end portion of the bar member W with a collet chuck, and then rotates the bar member W at high speed and cuts the outer peripheral portion of the front end of the bar member W with a cutting tool.

The endless chain C continuously applies a predetermined propulsive force or driving force acting forward to the feed arrow 201, but the shaft member 213 and the rotating member 212 with respect to the fixing member 211 fixed to the rod portion 202. Is rotatable, and the finger member 230 is further rotatable with respect to the grip portion 205 fixed to the rotating member 212. Therefore, the rear end portion of the rod member W that rotates at high speed is freely rotated by the feed arrow 201. It is in a state of being supported as much as possible.

According to the feed arrow 201 (bar material feeding device) of the present embodiment as described above, since the structure does not require a tubular elastic body, it is fundamentally caused by the problem that such an elastic body is damaged. To be released.

Further, since the present inventor can elastically deform the cylindrical metal body 232 due to the presence of the pair of opposed slit holes 232s, the rear end portion of the rod W can be elastically and stably gripped. It was confirmed.

Further, the present inventor further preferably has low sliding resistance and excellent wear resistance by using an appropriate amount of lubricating oil or the like for the sliding resistance between the cylindrical metal body 232 and the grip portion 205. It was confirmed that the surface treatment with high oil retention (manganese phosphate film treatment, nitriding treatment, etc.) can keep the temperature sufficiently low. As a result, the rotation accompanying the sliding between the two and the rotating means of the chuck joint 210 (specifically, the three steel balls 217 and the rear end expanding portion 215 and the steel ball supporting portion 218 supporting them) allow it. By rotation, it was confirmed that the bar W can be stably supported and fed even when the bar W rotates at high speed.

<Third Embodiment>
FIG. 9 is a schematic side view showing a bar material feeding device of the bar material feeding machine according to the third embodiment of the present invention, and FIG. 10 is a schematic side view of the bar material feeding device according to the third embodiment of the present invention. It is a vertical sectional view of a main part.

As shown in FIGS. 9 and 10, the bar material feeding device of the bar material feeder according to the third embodiment of the present invention is a feed arrow 301. The feed arrow 301 also has a rod portion 302 arranged on the rod material feeding axis XX of the rod material feeder, a blade portion 303 integrally fixed to the rear end portion of the rod portion 302, and a rod portion. It is provided with a finger chuck 304 (rod material gripping member) attached to the front end portion of the 302.

The blade portion 303 is locked to the endless chain C constituting the feed arrow driving means or the propulsion means of the bar material feeder. The endless chain C is wound around a drive sprocket and a floating sprocket (not shown) rotatably attached to a frame (not shown) of a bar feeder. The drive sprocket is operatively connected to a power source (not shown) such as an electric motor, and rotates from the operation of the power source to rotate the endless chain C. As the endless chain C rotates, the blade portion 303 locked to the traveling zone portion of the endless chain C moves forward or backward. Instead of the endless chain C, a belt, a pulley, or the like may be used.

The finger chuck 304 is supported by the rod portion 302 via a chuck joint 310 (connecting member) arranged in the front end region of the rod portion 302. The chuck joint 310 is fixed to the rod portion 302 and rotatably supports the finger chuck 304.

The finger chuck 304 has a grip portion 305 into which the rear end portion of the bar member W (in this example, an outer diameter of 20 mm, 32 mm, 51 mm, etc.) can be inserted, and the finger member 330 is cylindrical in the grip portion 305. It is rotatably accommodated via a roller bearing 333 and grips the rear end portion of the bar member W. The finger member 330 has a tubular metal body 332. The tubular metal body 332 has a through hole 332t penetrating in a direction perpendicular to the axial direction and three (three) evenly distributed in the circumferential direction extending from the through hole 332t to the front end along the axial direction. A slit hole 332s (of a split) is provided.

In the present embodiment, the tubular metal body 332 is made of a cylindrical steel member, SUJ, SCM, etc., and as shown in FIG. 10, for example, has an outer diameter of 32 mm, an inner diameter of 20 mm, and a length of 50 mm, and has one end side. Is provided with a truncated conical opening 332a having an apex angle of 60 ° and an opening diameter of 30 mm, and communicates with the internal space 332c. The through hole 332t is formed as a hole having a diameter of 6 mm centered at a position 12 mm from the other end side, and the width of the facing slit hole 332s is 1.5 mm.

As shown in FIG. 10, the chuck joint 310 has a rotating member 312 (rotating portion) arranged in the front portion and a fixing member 311 (fixing portion) arranged in the rear portion. The fixing member 311 of the chuck joint 310 is integrally fixed to the front end of the rod portion 302, and the rotating member 312 of the chuck joint 310 integrally supports the finger chuck 304.

More specifically, the grip portion 305 of the finger chuck 304 has a diameter of 50 mm and a length of 78 mm, and is provided with a truncated conical opening 305a having an apex angle of 96 ° and an opening diameter of 48 mm on the tip side, and has an inner diameter of 26 mm. It communicates with a cylindrical space 305c having an inner diameter of 42 mm via a connecting portion 305b having a length of 4 mm.

A finger member 330 is rotatably housed inside the cylindrical space 305c via a cylindrical roller bearing 333. As a result, the rear end portion of the bar W can be received by the truncated conical opening 305a and the connecting portion 305b of the grip portion 305, and the truncated conical opening 332a and the internal space 332c of the metal body 332. There is.

In this example, the inner peripheral wall surface of the internal space 332c of the metal body 332 is formed in a smooth cylindrical surface shape without steps or steps. However, if desired, a plurality of rib-shaped protrusions extending in the axial direction and protruding inward in the radial direction may be formed on the inner peripheral wall surface. The diameter of the inner peripheral wall surface or the diameter of the inscribed circle at the tip of the rib-shaped protrusion is set to be slightly smaller than the outer diameter of the bar member W.

The front end of the finger member 330 faces the rear end of the flange portion 305f (the portion forming the connecting portion 305b) of the grip portion 305, and the forward movement is restricted by the flange portion 305f. On the other hand, the rear portion of the finger member 330 can also rotate with respect to the cylindrical opening in front of the rotating member 312 via the cylindrical roller bearing 335.

The rotating member 312 of the chuck joint 310 is integrally connected to the shaft member 313 on the rear side, and is screwed into the female screw portion on the rear side of the grip portion 305 on the front side.

The rear portion of the shaft member 313 is inserted into the tubular opening of the fixing member 311 via the cylindrical roller bearing 317.

In addition, a female screw portion (not shown) protruding forward from the front end surface of the rod portion 302 is screwed and fastened to the male screw portion 319 of the chuck joint 310.

Next, the operation of the feed arrow 301 of the present embodiment will be described.

The rear end of the bar W arranged on the bar feeding axis XX is the truncated conical opening 305a and the connecting portion 305b of the grip portion 305, the truncated conical opening 332a of the metal body 332, and the internal space. Accepted by 332c and fitted into the interior space 332c. The inner peripheral wall surface of the metal body 332 has a slightly enlarged diameter, and its elastic restoring force elastically grips the rear end surface of the rod member W. Thus, the rear end portion of the rod member W is elastically gripped by the finger member 330 of the finger chuck 304.

The front end portion of the bar member W is inserted into, for example, an NC automatic lathe (not shown), and is inserted into the spindle internal pipe of the NC automatic lathe. The spindle of the NC automatic lathe grips the front end portion of the bar member W with a collet chuck, and then rotates the bar member W at high speed and cuts the outer peripheral portion of the front end of the bar member W with a cutting tool.

The endless chain C continuously applies a predetermined propulsive force or driving force acting forward to the feed arrow 301, but the shaft member 313 and the rotating member 312 with respect to the fixing member 311 fixed to the rod portion 302. Is rotatable, and the finger member 330 is further rotatable with respect to the grip portion 305 fixed to the rotating member 312. Therefore, the rear end portion of the rod member W that rotates at high speed is freely rotated by the feed arrow 301. It is in a state of being supported as much as possible.

According to the feed arrow 301 (bar material feeding device) of the present embodiment as described above, since the structure does not require a tubular elastic body, it is fundamentally caused by the problem that such an elastic body is damaged. To be released.

Further, since the present inventor can elastically deform the cylindrical metal body 332 due to the presence of the pair of opposed slit holes 332s, the rear end portion of the rod W can be elastically and stably gripped. It was confirmed.

Furthermore, the present inventor has confirmed that the resistance of the cylindrical roller bearing 333 between the cylindrical metal body 332 and the grip portion 305 can be kept sufficiently low. As a result, the rotation between the two and the rotation allowed by the rotating means (specifically, the cylindrical roller bearing 317) of the chuck joint 310 make the rod W stable even when the rod W rotates at high speed. It was confirmed that it could be shipped in support of.

<Fourth Embodiment>
FIG. 11 is a schematic side view showing a bar material feeding device of the bar material feeder according to the fourth embodiment of the present invention, and FIG. 12 is a schematic side view of the bar material feeding device according to the fourth embodiment of the present invention. It is a vertical sectional view of a main part.

As shown in FIGS. 11 and 12, the bar material feeding device of the bar material feeder according to the fourth embodiment of the present invention is a feed arrow 401. The feed arrow 401 also has a rod portion 402 arranged on the rod material feeding axis XX of the rod material feeder, a blade portion 403 integrally fixed to the rear end portion of the rod portion 402, and a rod portion. It includes a finger chuck 404 (rod gripping member) attached to the front end portion of the 402.

The blade portion 403 is locked to the endless chain C constituting the feed arrow driving means or the propulsion means of the bar material feeder. The endless chain C is wound around a drive sprocket and a floating sprocket (not shown) rotatably attached to a frame (not shown) of a bar feeder. The drive sprocket is operatively connected to a power source (not shown) such as an electric motor, and rotates from the operation of the power source to rotate the endless chain C. Due to the rotational running of the endless chain C, the blade portion 403 locked to the traveling zone portion of the endless chain C is moved forward or backward. Instead of the endless chain C, a belt, a pulley, or the like may be used.

The finger chuck 404 is supported by the rod portion 402 via a chuck joint 410 (connecting member) arranged in the front end region of the rod portion 402. The chuck joint 410 is fixed to the rod portion 402 and rotatably supports the finger chuck 404.

The finger chuck 404 has a grip portion 405 into which a rear end portion of two types of bar members W having different diameters (outer diameters of 20 mm, 32 mm, 51 mm, etc. in this example) can be inserted, and two finger members 430 (in this example). The first finger member and the second finger member) are rotatably housed in the grip portion 405 via a cylindrical roller bearing 433, and two types of rods W (first rod and second rod) having different diameters are accommodated. The rear end of the material) can be selectively gripped. The two finger members 430 have tubular metal bodies 432 and 462, respectively, and a tubular spacer 440 is arranged between them. The two tubular metal bodies 432 and 462 have through holes 432t and 462t penetrating in the direction perpendicular to the axial direction, respectively, and in the circumferential direction extending from the through holes 432t and 462t to the front end along the axial direction. Three (30%) slit holes 432s and 462s, which are evenly distributed, are provided.

In the present embodiment, the two tubular metal bodies 432 and 462 are made of a cylindrical steel member, SUJ, SCM and the like. As shown in FIG. 12, the tubular metal body 432 on the front side has, for example, an outer diameter of 32 mm, an inner diameter of 24 mm, and a length of 50 mm, and has a truncated conical opening having an apex angle of 60 ° and an opening diameter of 30 mm on one end side. 432a is provided and communicates with the internal space 432c. The through hole 432t is formed as a hole having a diameter of 6 mm centered at a position 12 mm from the other end side, and the width of each of the 30% slit holes 432s is 1.5 mm. As shown in FIG. 12, the tubular metal body 462 on the rear side has, for example, an outer diameter of 32 mm, an inner diameter of 16 mm, and a length of 50 mm, and has a truncated conical opening having an apex angle of 60 ° and an opening diameter of 30 mm on one end side. 462a is provided and communicates with the internal space 462c. The through hole 462t is formed as a hole having a diameter of 6 mm centered at a position 12 mm from the other end side, and the width of each of the 30% slit holes 462s is 1.5 mm.

As shown in FIG. 12, the chuck joint 410 has a rotating member 412 (rotating portion) arranged in the front portion and a fixing member 411 (fixing portion) arranged in the rear portion. The fixing member 411 of the chuck joint 410 is integrally fixed to the front end of the rod portion 402, and the rotating member 412 of the chuck joint 410 integrally supports the finger chuck 404.

More specifically, the grip portion 405 of the finger chuck 404 has a diameter of 50 mm and a length of 112 mm, and is provided with a truncated conical opening 405a having an apex angle of 96 ° and an opening diameter of 48 mm on the tip side, and has an inner diameter of 26 mm. It communicates with a cylindrical space 405c having an inner diameter of 42 mm via a connecting portion 405b having a length of 4 mm.

A cylindrical metal body 432 on the front side is rotatably housed inside the cylindrical space 405c via a cylindrical roller bearing 433. As a result, the rear end portion of the bar W can be received by the truncated conical opening 405a and the connecting portion 405b of the grip portion 405 and the truncated conical opening 432a and the internal space 432c of the metal body 432. There is.

In this example, the inner peripheral wall surface of the internal space 432c of the metal body 432 is formed in a smooth cylindrical surface shape without steps or steps. However, if desired, a plurality of rib-shaped protrusions extending in the axial direction and protruding inward in the radial direction may be formed on the inner peripheral wall surface. The diameter of the inner peripheral wall surface or the diameter of the inscribed circle at the tip of the rib-shaped protrusion is set to be slightly smaller than the outer diameter of the bar member W.

The front end of the tubular metal body 432 on the front side faces the rear end of the flange portion 405f (the portion forming the connecting portion 405b) of the grip portion 405, and the forward movement is restricted by the flange portion 405f. On the other hand, the tubular metal body 462 on the rear side is rotatable with respect to the tubular opening in front of the rotating member 412 via the cylindrical roller bearing 435.

The rotating member 412 of the chuck joint 410 is integrally connected to the shaft member 413 on the rear side, and is screwed into the female screw portion on the rear side of the grip portion 405 on the front side.

The rear portion of the shaft member 413 is inserted into the tubular opening of the fixing member 411 via the cylindrical roller bearing 417.

In addition, a female screw portion (not shown) protruding forward from the front end surface of the rod portion 402 is screwed and fastened to the male screw portion 419 of the chuck joint 410.

Next, the operation of the feed arrow 401 of the present embodiment will be described.

The rear end of the bar W arranged on the bar feeding axis XX is the truncated conical opening 405a and the connecting portion 405b of the grip portion 405 and the truncated conical opening 432a of the metal bodies 432 and 462. It is accepted by the 462a and the interior spaces 432c, 462c and fitted into the interior spaces 432c, 462c. The inner peripheral wall surface of the metal body 462 is slightly enlarged in diameter, and the rear end surface of the bar W is elastically gripped by the elastic restoring force thereof. Thus, the rear end portion of the bar member W is elastically gripped by the metal body 462 on the rear side of the finger member 430 of the finger chuck 404. Alternatively, when the diameter of the bar W is large, the rear end portion of the bar W arranged on the bar feeding axis XX is the cut conical opening 405a and the connecting portion 405b of the grip portion 405 and the connecting portion 405b. It is accepted by the truncated conical opening 432a and the internal space 432c of the metal body 43 and is fitted into the internal space 432c. The inner peripheral wall surface of the metal body 432 has a slightly enlarged diameter, and its elastic restoring force elastically grips the rear end surface of the rod member W. Thus, the rear end portion of the bar member W is elastically gripped by the metal body 432 on the front side of the finger member 430 of the finger chuck 404. As described above, the finger member 430 of the present embodiment can correspond to two different diameters of the bar member W.

In terms of control, it is confirmed in advance which finger member 430 (metal body 432 or metal body 462) the supplied bar member W is inserted into, so that the rear end of the bar member W reaches a desired position. By moving the feed arrow 401 to, the rod member W can be inserted into the corresponding finger member 430 (metal body 432 or metal body 462).

After that, the front end portion of the bar member W is inserted into, for example, an NC automatic lathe (not shown) and inserted into the spindle internal pipe of the NC automatic lathe. The spindle of the NC automatic lathe grips the front end portion of the bar member W with a collet chuck, and then rotates the bar member W at high speed and cuts the outer peripheral portion of the front end of the bar member W with a cutting tool.

The endless chain C continuously applies a predetermined propulsive force or driving force acting forward to the feed arrow 401, but the shaft member 413 and the rotating member 412 with respect to the fixing member 411 fixed to the rod portion 402. Is rotatable, and the finger member 430 is further rotatable with respect to the grip portion 405 fixed to the rotating member 412. Therefore, the rear end portion of the rod member W that rotates at high speed is freely rotated by the feed arrow 401. It is in a state of being supported as much as possible.

According to the feed arrow 401 (bar material feeding device) of the present embodiment as described above, since the structure does not require a tubular elastic body, it is fundamentally caused by the problem that such an elastic body is damaged. To be released.

Further, the inventor of the present invention can elastically deform the cylindrical metal bodies 432 and 462 due to the presence of the slit holes 432s and 462s in half, so that the rear end portion of the rod W can be elastically and stably. It was confirmed that it could be grasped.

Furthermore, the present inventor has confirmed that the resistance of the cylindrical roller bearing 433 between the cylindrical metal body 432 and the grip portion 405 can be maintained sufficiently low. As a result, the rotation between the two and the rotation allowed by the rotating means (specifically, the cylindrical roller bearing 417) of the chuck joint 410 make the rod W stable even when the rod W rotates at high speed. It was confirmed that it could be shipped in support of.

In the rod material feeding device (feed arrow 401) of the rod material feeder according to the fourth embodiment, the two finger members 430 (first finger member and second finger member) are each tubular metal body 432. , 462, and the tubular metal bodies 432 and 462 have through holes 432t and 462t penetrating in the direction perpendicular to the axial direction, respectively, and forward along the axial direction from the through holes 432t and 462t, respectively. It has three (30%) slit holes 432s and 462s that are evenly distributed in the circumferential direction extending to the end. However, each of the two finger members 430 may have a tubular elastic body and a tubular metal body that covers the tubular elastic body (the first shown in FIGS. 1 to 4). (Refer to the bar material feeding device (feed arrow 101) of the bar material feeder according to the embodiment). In this case, since the tubular elastic body is covered with the tubular metal body in each of the two finger members 430, damage to the tubular elastic body is effectively suppressed. On the other hand, the sliding resistance between the tubular metal body covering the tubular elastic body and the grip portion 405 of the bar gripping member can be kept sufficiently low by the cylindrical roller bearing 433 or the like, so that the rotation between the two can be maintained. By the rotation allowed by the rotating means of the chuck joint 410 (specifically, the cylindrical roller bearing 417), the rod W can be stably supported and fed even when the rod W rotates at high speed. That is, even in this case, these can be selectively used for two types of rods having different diameters.

Alternatively, one of the two finger members 430 (first finger member and second finger member) has a tubular metal body, and the tubular metal body penetrates in a direction perpendicular to the axial direction. It has a through hole and three (30%) slit holes that extend from the through hole to the front end along the axial direction and are evenly distributed in the circumferential direction, and is the other of the two finger members 430. However, it may have a tubular elastic body and a tubular metal body that covers the tubular elastic body. Even in this case, these can be selectively used for two types of rods having different diameters.

Further, the number of finger members 430 provided on the grip portion 405 is not limited to two, and may be three or more. In this case, these can be selectively used for three or more types of rods having different diameters.

1 Feed arrow 2 Rod part 3 Blade part 4 Finger chuck C Endless chain 10 Connecting member 30 Cylindrical elastic body 101 Feed arrow 102 Rod part 103 Blade part 104 Finger chuck 105 Grip part 105a Cut conical opening 105b Connecting part 105c Cylindrical Space 105f Flange 110 Chuck joint 111 Fixing member 111a Front opening 112 Rotating member 112a Hollow cylinder 112f Flange 113 Shaft member 114 Pin 115 Rear end expansion 116 Circular shoulder 117 Steel ball 118 Steel ball support 130 Finger member 131 Elastic body 131a Cut conical opening 131c Internal space 132 Metal body 135 Rotating body accommodation area 201 Feeding arrow 202 Rod part 203 Blade part 204 Finger chuck 205 Grip part 205a Cut conical opening 205b Connecting part 205c Cylindrical space 205f Flange 210 Chuck joint 211 Fixing member 211a Front opening 212 Rotating member 212a Hollow cylindrical part 212f Flange part 213 Shaft member 214 Pin 215 Rear end expansion part 216 Circular shoulder part 217 Steel ball 218 Steel ball support part 230 Finger member 232 Metal Body 232a Cut conical opening 232c Internal space 232s Opposing slit hole 232t Through hole 235 Rotating body accommodation area 301 Feeding arrow 302 Rod part 303 Blade part 304 Finger chuck 305 Grip part 305a Cut conical opening 305b Connecting part 305c Cylindrical Space 305f Flange part 310 Chuck joint 311 Fixing member 312 Rotating member 313 Shaft member 317 Cylindrical roller bearing 319 Male screw part 330 Finger member 332 Metal body 332a Cut conical opening 332c Internal space 332s Opposing slit hole 332t Through hole 333 Cylindrical roller bearing 335 Cylindrical roller bearing 401 Feed arrow 402 Rod part 403 Blade part 404 Finger chuck 405 Grip part 405a Cut conical opening 405b Connecting part 405c Cylindrical space 405f Flange part 410 Chuck joint 411 Fixing member 412 Rotating member 413 Shaft member 417 Cylindrical roller Bearing 419 Male screw part 430 Finger member 432 Metal body 432a Cut conical opening 432c Internal space 432s Opposing slit hole 432t Through hole 433 Cylindrical roller bearing 4 35 Cylindrical roller bearing 440 Spacer 462 Metal body 462a Cut conical opening 462c Internal space 462s Opposing slit hole 462t Through hole W Bar material XX Bar material feeding axis

Claims (4)

A bar gripping member that grips the rear end of the bar,
The rod part that moves forward when the rod material is fed, and
A connecting member interposed between the bar gripping member and the rod portion so as to rotatably support the bar gripping member.
With
In the bar feed device of the bar feeder that rotatably supports the bar that rotates during cutting.
The connecting member includes a rotating portion that integrally supports the bar gripping member, a fixing portion that is connected to the rod portion, and a rotating means that connects the rotating portion and the fixing portion so as to be relatively rotatable. Have and
The bar gripping member has a grip portion having a hollow portion and a finger member rotatably housed in the hollow portion of the grip portion and grips the rear end portion of the bar member.
The finger member has a tubular elastic body that grips the rear end portion of the rod member, and a tubular metal body that covers the tubular elastic body.
The tubular elastic body is a cylindrical elastic body, and is
The rod material feeding device of a bar material feeder, wherein the tubular metal body is a cylindrical metal body. A bar gripping member that grips the rear end of the first bar having the first diameter or the second bar having a second diameter different from the first diameter.
The rod part that moves forward when the rod material is fed, and
A connecting member interposed between the bar gripping member and the rod portion so as to rotatably support the bar gripping member.
With
In the bar material feeding device of the bar material feeder that rotatably supports the first bar material or the second bar material that rotates during cutting.
The connecting member includes a rotating portion that integrally supports the bar gripping member, a fixing portion that is connected to the rod portion, and a rotating means that connects the rotating portion and the fixing portion so as to be relatively rotatable. Have and
The bar gripping member includes a grip portion having a hollow portion, a first finger member rotatably housed in the hollow portion of the grip portion and capable of gripping the rear end portion of the first bar member, and the grip. It has a second finger member that is rotatably housed in the hollow portion of the portion and is capable of gripping the rear end portion of the second rod member.
Each of the first finger member and the second finger member has a tubular metal body that grips the first bar member or the rear end portion of the second bar member, and each tubular metal. The body is provided with a through hole penetrating in a direction perpendicular to the axial direction and a slit hole extending from the through hole to the front end in the axial direction. Device. A bar gripping member that grips the rear end of the first bar having the first diameter or the second bar having a second diameter different from the first diameter.
The rod part that moves forward when the rod material is fed, and
A connecting member interposed between the bar gripping member and the rod portion so as to rotatably support the bar gripping member.
With
In the bar material feeding device of the bar material feeder that rotatably supports the first bar material or the second bar material that rotates during cutting.
The connecting member includes a rotating portion that integrally supports the bar gripping member, a fixing portion that is connected to the rod portion, and a rotating means that connects the rotating portion and the fixing portion so as to be relatively rotatable. Have and
The bar gripping member includes a grip portion having a hollow portion, a first finger member rotatably housed in the hollow portion of the grip portion and capable of gripping the rear end portion of the first bar member, and the grip. It has a second finger member that is rotatably housed in the hollow portion of the portion and is capable of gripping the rear end portion of the second rod member.
Each of the first finger member and the second finger member has a tubular elastic body that grips the rear end portion of the first bar member or the second bar member, and a tubular shape that covers the tubular elastic body. A bar material feeding device of a bar material feeder characterized by having a metal body of. A bar gripping member that grips the rear end of the first bar having the first diameter or the second bar having a second diameter different from the first diameter.
The rod part that moves forward when the rod material is fed, and
A connecting member interposed between the bar gripping member and the rod portion so as to rotatably support the bar gripping member.
With
In the bar material feeding device of the bar material feeder that rotatably supports the first bar material or the second bar material that rotates during cutting.
The connecting member includes a rotating portion that integrally supports the bar gripping member, a fixing portion that is connected to the rod portion, and a rotating means that connects the rotating portion and the fixing portion so as to be relatively rotatable. Have and
The bar gripping member includes a grip portion having a hollow portion, a first finger member rotatably housed in the hollow portion of the grip portion and capable of gripping the rear end portion of the first bar member, and the grip. It has a second finger member that is rotatably housed in the hollow portion of the portion and is capable of gripping the rear end portion of the second rod member.
One of the first finger member and the second finger member has a tubular metal body that grips the first bar member or the rear end portion of the second bar member, and the tubular metal body. Is provided with a through hole penetrating in a direction perpendicular to the axial direction and a slit hole extending from the through hole to the front end in the axial direction.
The other of the first finger member and the second finger member is a tubular elastic body that grips the first bar member or the rear end portion of the second bar member, and a tubular shape that covers the tubular elastic body. A bar material feeding device of a bar material feeder characterized by having a metal body of.

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