Bar support device

Abstract

To provide a rod material supporting device that allows a support bush to be replaced by a simpler operation.SOLUTION: A rod material supporting device 10 which is provided on a rod material support machine for supplying a rod material to a processing machine and rotatably supporting the rod material, includes a support frame 30 to be attached to the rod material support machine, and a support bush 20 to be attached to the support frame 30. The support bush 20 has first fixing means projecting toward the support frame 30. The support frame 30 has second fixing means engageable with the first fixing means and a stopper part arranged so as to be capable of projecting and retracting toward the support bush 20 and capable of abutting on one end of the support bush 20.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a bar support device for rotatably supporting a bar in a bar feeder. [Background technology]

[0002] A bar feeder continuously feeds long, thin bars into a processing machine such as a lathe, and rotatably supports the bars while the processing machine is in operation. Conventionally, a bar support device has been known as a means for rotatably supporting the bars, in which support bushes constituting a roughly semi-cylindrical bar receiving portion are fixed to the inner peripheral surfaces at both ends of upper and lower supports that support the bar from above and below, and the outer surface of the bar is rotatably supported by the inner peripheral surface of the support bushes.

[0003] There are various known methods for fixing such support bushes, but for example, as shown in Fig. 10, a bar support device 110 is constructed by assembling a support bush 120 having a semicircular recess 122 formed on the inner wall of a substantially U-shaped support frame 130. This support bush 120 is fixed to the support frame 130 by a fixing bolt 121.

[0004] With this configuration, the inner diameters of the feed pipe that pushes out the bar and the support bushes that support the bar can be changed depending on the inner diameter of the lathe spindle or the outer diameter of the bar being supplied, and an appropriate support bush can be selected depending on the outer diameter of the bar being supplied, enabling the bar to be supported for smooth rotation. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 63-295147 Summary of the Invention [Problem to be solved by the invention]

[0006] However, according to the conventional method of fixing the support bush, the support bush is fixed to the support frame using a fixing bolt or the like, which requires tools to replace the support bush, making the replacement work complicated.

[0007] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to solve such problems and to provide a bar support device that allows replacement of a support bush with a simpler operation. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a bar support device that is provided on a bar feeder that supplies a bar to a processing machine and rotatably supports the bar, the bar support device comprising a support frame attached to the bar feeder and a support bush attached to the support frame, the support bush having a first fixing means that protrudes toward the support frame, the support frame having a second fixing means that can be engaged with the first fixing means, and a stopper portion that is arranged so as to be able to freely protrude and retract toward the support bush and can abut against one end of the support bush. The first fixing means and the second fixing means are engaged with each other to restrain the support bush in the up and down direction and also to restrain the movement of the stopper body of the stopper portion toward the other end side relative to one end where the stopper body abuts, and the stopper portion can release the abutment by pushing the stopper body, which is biased in a certain direction, in the direction opposite to the certain direction. It is characterized by:

[0009] In the bar support device according to the present invention, it is preferable that the first fixing means and the second fixing means have engaging portions each formed in a wedge shape.

[0010] In the bar support device according to the present invention, the stopper portion abuts against one end of the support bush. The above A stopper body and the stopper body In the given direction It is preferable to provide a biasing elastic body.

[0011] In the bar support device according to the present invention, the stopper body is for pushing the stopper body in the opposite direction It is preferable to provide an operating portion into which a tool can be inserted.

[0012] In the bar support device according to the present invention, the support frame is 2 It is preferable that the support bush is formed in a U-shaped cross section consisting of a bottom portion to which the fixing means is attached and a pair of side walls erected from both ends of the bottom portion, and that the support bush is formed in a rectangular shape corresponding to the inner surface of the U-shaped cross section. Effect of the Invention

[0013] According to the present invention, the support bush has a first fixing means protruding toward the support frame, and the support frame has a second fixing means engageable with the first fixing means, and a stopper portion that is arranged to be able to protrude and retract toward the support bush and can abut against one end of the support bush, so that the support bush can be assembled with a single touch without using tools. [Brief description of the drawings]

[0014] [Figure 1] 1 is a schematic diagram of a bar feeder according to an embodiment of the present invention; [Diagram 2] 1 is a perspective view of a bar support device according to an embodiment of the present invention; [Diagram 3] FIG. 4 is a cross-sectional view of a support bush of the bar support device according to the embodiment of the present invention. [Figure 4] FIG. 2 is a cross-sectional view of a support frame of the bar material supporting device according to the embodiment of the present invention. [Diagram 5] 5A to 5C are diagrams showing a method of attaching a support bush of the bar support device according to the embodiment of the present invention. [Figure 6] 5A to 5C are diagrams showing a method of attaching a support bush of the bar support device according to the embodiment of the present invention. [Figure 7] 5A to 5C are diagrams showing a method of attaching a support bush of the bar support device according to the embodiment of the present invention. [Figure 8] FIG. 4 is a diagram showing a state in which the support bush of the bar material supporting device according to the embodiment of the present invention has been completely attached; [Figure 9] FIG. 13 is a diagram showing a modified example of the bar support device according to the embodiment of the present invention. [Figure 10]13A and 13B are diagrams for explaining a conventional method for fixing a support bush. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. Note that the following embodiments do not limit the inventions according to the claims, and all of the combinations of features described in the embodiments are not necessarily essential to the solution of the invention.

[0016] FIG. 1 is a schematic diagram of a bar material supplying machine according to an embodiment of the present invention, FIG. 2 is an oblique view of a bar material support device according to an embodiment of the present invention, FIG. 3 is a cross-sectional view of a support bush of a bar material support device according to an embodiment of the present invention, FIG. 4 is a cross-sectional view of a support frame of a bar material support device according to an embodiment of the present invention, FIGS. 5 to 7 are figures showing a method of installing a support bush of a bar material support device according to an embodiment of the present invention, FIG. 8 is a figure showing the completed state of installation of a support bush of a bar material support device according to an embodiment of the present invention, FIG. 9 is a figure showing a modified example of a bar material support device according to an embodiment of the present invention, and FIG. 10 is a figure for explaining a conventional method of fixing a support bush.

[0017] The material supplying machine M of this embodiment supplies material to a material processing machine called a lathe (hereinafter referred to as a “processing machine 1”) as an example, and is disposed adjacent to the processing machine 1.

[0018] As shown in FIG. 1, the material supplying machine M includes a main body 5 that supplies a bar material 2 as a material to a processing machine 1, and a base 7 that supports the main body 5 at a predetermined height.

[0019] The main body 5 comprises a bar material supporting device 10 which holds the bar material 2 supplied from the outside, and a bar material sending section 6 which sends the bar material 2 to the processing machine, and the bar material 2 held by the bar material supporting device 10 is sent to the processing machine 1 by the bar material sending section 6.

[0020] The main body 5 is provided with a bar supply section (not shown) that appropriately supplies the bar 2 supplied from outside to the bar support device 10, but as this is a conventionally known device, details thereof will be omitted.

[0021] On the other hand, the processing machine 1 is equipped with a cylindrical main shaft 4 through which the bar 2 can pass, and this main shaft 4 is provided with a chuck 3 that holds the tip of the bar 2. The bar 2 is rotated while being held by the chuck 3, and is machined by a predetermined cutting tool (e.g., a cutting tool) not shown.

[0022] As shown in Figure 2, the bar support device 10 has a support frame 30, which is formed with an approximately C-shaped cross section, and a support bush 20, which extends in the longitudinal direction and has an approximately semicircular inner surface, attached to the inner surface of the support frame 30.As shown in Figure 1, the bar 2 is sent along the inner surface of the support bush 20 towards the processing machine, and is thereby sent to the main spindle 4 of the processing machine 1.

[0023] Although not shown, for example, the bar support device 10 is supplied with the bar 2 by a bar supply unit from a bar supply shelf for placing the bar 2 supplied from the outside.

[0024] The bar delivery section 6 is provided with a pusher 8 for transporting the bar 2 received by the bar support device 10 to the processing machine 1.

[0025] The pushing tool 8 includes, for example, a slider 8a with a circular cross section that can move freely back and forth along the longitudinal direction of the bar support device 10, a push rod 8b that is positioned in front of the slider 8a and pushes out the bar 2, and a finger chuck 8c that is positioned in front of the push rod 8b via a bearing and grips the rear end of the bar 2.

[0026] Then, the rear end of the bar 2 is gripped by the finger chuck 8c, and as the slider 8a moves and the push rod 8b is pushed out, the tip of the bar 2 is gripped by the chuck 3 of the processing machine 1 and sent toward the processing machine 1 until it hits a stopper (not shown).

[0027] The slider 8a is controlled to move back and forth within the bar support device 10 by a driving means not shown, and the bar 2 is sent to the processing machine 1 by advancing the push rod 8b. However, since this driving means is well known in the art, its description will be omitted.

[0028] As shown in FIG. 1, a bar support unit 9 for rotatably supporting the bar 2 is provided in front of the bar support device 10, and this bar support unit 9 prevents the bar 2 from swinging around.

[0029] As shown in Fig. 2, the support bush 20 has a substantially semicircular curved surface 24 that opens upward, and its outer shape is formed into a substantially rectangular shape to correspond to the inner surface of a U-shaped cross section of a support frame 30 described later. Also, as shown in Fig. 3, the support bush 20 has a first fixing means 21 formed on a bottom surface 22. A recess 23 is formed on the bottom surface 22 along the longitudinal direction so that the first fixing means 21 does not protrude from the bottom in a side view of the support bush 20, and the recess 23 enables engagement with a second fixing means described later.

[0030] Also, it is preferable that the first fixing means 21 is formed in the approximate center portion in the longitudinal direction of the bottom surface 22, and its cross-sectional shape is formed in a wedge shape having a slope 25 on one side in the longitudinal direction.

[0031] 2, the support frame 30 is formed with a U-shaped cross section, which is composed of a bottom 31 and a pair of side walls 32 erected from both ends of the bottom 31 in the width direction. A second fixing means 33 is attached to the bottom 31, and is formed so as to be able to engage with the first fixing means 21. The second fixing means 33 is formed with a slope 34 so that the engaging portion with the first fixing means 21 corresponds to the slope 25 of the first fixing means 21, and the second fixing means 33 is also formed with a wedge-shaped cross section like the first fixing means 21.

[0032] The bottom 31 is formed with a stopper portion 40 having a stopper body 41 arranged so as to be able to freely protrude and retract toward the support bush 20. The stopper body 41 is inserted into a stepped hole 45 formed in the bottom 31, and is urged upward by an elastic body 43 such as a coil spring. At this time, the stopper body 41 is formed with a flange portion 42 extending in the radial direction, and the flange portion 42 abuts against the step of the stepped hole 45 to prevent the stopper body 41 from falling off. The stopper portion 40 is formed at a position where the end of the support bush 20 and the stopper body 41 can abut when the first fixing means 21 and the second fixing means 33 are engaged as described later.

[0033] Furthermore, since the elastic body 43 is supported by a closing plate 46 that closes the lower end of the stepped hole 45, the elastic force is applied to the stopper body 41. Furthermore, an operating portion 44 into which a tool or the like can be inserted is formed at the upper end of the stopper body 41. By configuring the stopper portion 40 in this manner, the flange portion 42 moves up and down over the enlarged diameter portion of the stepped hole 45, making it possible to position the stopper body 41 so as to be able to freely appear and disappear.

[0034] Next, a method for attaching and removing the support bush 20 of the bar support device 10 according to this embodiment will be described with reference to Figures 5 to 8. First, as shown in Figure 5, the support bush 20 is inserted between the side walls 32 of the support frame 30 from diagonally above. At this time, the second fixing means 33 formed on the support frame 30 is inserted into the recess 23 formed on the lower end of the support bush 20, and the stopper body 41 is pressed down by the support bush 20 against the elastic force of the elastic body 43.

[0035] 6, while the stopper body 41 is pressed down by the support bush 20, the support bush 20 is moved along the longitudinal direction of the support frame 30. At this time, the second fixing means 33 is inserted into the recess 23, so that the second fixing means 33 and the support bush 20 do not interfere with each other.

[0036] Next, as shown in Fig. 7, when the support bush 20 is moved until the first fixing means 21 of the support bush 20 and the second fixing means 33 of the support frame 30 are engaged, the support bush 20 can no longer press the stopper body 41, and as shown in Fig. 8, the pressing force of the stopper body 41 disappears and the stopper body 41 is lifted upward by the elastic force of the elastic body 43. As a result, the stopper body 41 comes into contact with the end of the support bush 20 and can restrain the support bush 20 in the longitudinal direction.

[0037] In addition, the first fixing means 21 and the second fixing means 33 are engaged with each other such that the inclined surfaces 25, 34 engage with each other, and therefore their wedge shapes restrain the support bush 20 in the up and down direction and also provide an anti-rotation effect for the support bush 20. In addition, since the support bush 20 is formed in a roughly rectangular shape and is assembled to the support frame 30 which is formed in a U-shaped cross section, the support bush 20 can be moved along the side wall 32 of the support frame 30, making it possible to easily perform the assembly work.

[0038] When replacing the support bush 20, the stopper body 41 is pushed down from the state shown in Figure 8 by inserting a tool into the operating portion 44 formed above the stopper body 41, thereby releasing the abutment between the end of the support bush 20 and the stopper body 41, and then the support bush 20 is pulled out in the direction in which the engagement between the first fixing means 21 and the second fixing means 33 is released, resulting in the state shown in Figure 5. The stopper body 41 pushes up the support bush 20, thereby forming a gap between it and the bottom 31 of the support frame 30, and the support bush 20 can be easily removed from the support frame 30 by inserting a hand into this gap.

[0039] From a safety standpoint, it is desirable to remove the support bush 20 by indirectly pushing down the stopper body 41 using an existing tool or the like as described above, but it is also possible to perform the work by directly pushing down the stopper body 41 with one's hand or the like.

[0040] In the bar support device 10 according to the above embodiment, the support bush 20 is formed in a generally rectangular shape, and the support frame 30 is formed in a U-shaped cross section, but the shapes of the support bush and the support frame are not limited to this, and for example, as shown in Fig. 9, the first fixing means 21 may be provided below the generally C-shaped support bush 20', and the second fixing means 33 may be provided on the generally plate-shaped support frame 30'. Even with this configuration, it is possible to prevent the support bush 20' itself from rotating in the circumferential direction due to the rotation of the bar, and it is possible to reduce the size and weight of the bar support device itself.

[0041] In addition, the first fixing means 21 and the second fixing means 33 have been described as being roughly wedge-shaped with the inclined surfaces 25, 34 formed thereon, but as long as the first fixing means 21 and the second fixing means 33 can engage with each other, the shape is not limited to a wedge shape and may be formed in a shape without an inclined surface. Furthermore, the bar support device 10 according to this embodiment has been described as using a coil spring as the elastic body 43, but rubber or a leaf spring may be used as long as it can provide a biasing force to arrange the stopper body 41 so that it can be freely raised and lowered. It is clear from the claims that such modified or improved forms are also included in the technical scope of the present invention. [Explanation of symbols]

[0042] REFERENCE SIGNS LIST 1 processing machine, 5 main body, 7 base, 10 bar support device, 20 support bush, 21 first fixing means, 22 bottom surface, 23 recess, 24 semicircular portion, 25,34 inclined surface, 30 support frame, 31 bottom portion, 32 side wall, 33 second fixing means, 40 stopper portion, 41 stopper main body, 42 flange portion, 43 elastic body, 44 operating portion, 45 stepped hole, 46 closing plate.

Claims

1. A bar material supporting device provided in a bar material supplying machine that supplies a bar material to a processing machine and rotatably supports the bar material, A support frame attached to the bar feeder, and a support bush attached to the support frame, the support bushing has a first fastening means protruding toward the support frame; the support frame has a second fixing means engageable with the first fixing means, and a stopper portion disposed so as to be capable of protruding and retracting toward the support bush and capable of abutting against one end of the support bush; A bar support device characterized in that the first fixing means and the second fixing means engage with each other to restrain the support bush in the vertical direction and also restrain movement toward the other end relative to one end where the stopper body of the stopper portion abuts, and the stopper portion can release the abutment by pushing the stopper body, which is biased in a fixed direction, in the direction opposite to the fixed direction.

2. 2. The bar support device according to claim 1, 13. A bar support device according to claim 12, wherein the first fixing means and the second fixing means have engaging portions each formed in a wedge shape.

3. The bar support device according to claim 1 or 2, The stopper portion comprises a stopper body that abuts against one end of the support bush, and an elastic body that biases the stopper body in the certain direction.

4. 4. The bar support device according to claim 3, The stopper body is provided with an operating portion into which a tool for pushing the stopper body in the opposite direction can be inserted.

5. The bar support device according to any one of claims 1 to 4, The support frame is formed with a U-shaped cross section consisting of a bottom portion to which the second fixing means is attached and a pair of side walls erected from both ends of the bottom portion, and the support bush is formed with a rectangular shape corresponding to the inner surface of the U-shaped cross section.

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