JP2020110882A - Anti-vibration device - Google Patents

Abstract

To provide an anti-vibration device by which a bush member is not removed from a bearing without making major improvement to a conventional anti-vibration device, even if large force is added to a bar stock.SOLUTION: A bar stock anti-vibration device, which is anti-vibration device for a bar stock which is chucked in a processor and is rotated by a main spindle, comprises a bar stock support unit which rotatably supports the bar stock. The bar stock support unit includes a contact member in which the bar stock is inserted and which can contact the bar stock, and can grip the bar stock inserted in the contact member depending on how the contact member is arranged. The contact member includes a bush member formed of an elastic body, and the bush member includes a reinforcement body formed of a material having a mechanical strength higher than that of the bush member.SELECTED DRAWING: Figure 8

Description

The present invention relates to a bar vibration isolator used in a material feeder.

2. Description of the Related Art A material feeder for supplying a bar to a processing machine such as an NC automatic lathe has been known. The material feeding machine feeds the bar material to the processing machine while holding the rear end of the bar material with the finger chuck. The tip of the bar fed into the processing machine is gripped by the chuck of the processing machine, and is cut by a tool such as a cutting tool. In particular, when cutting a long bar, since the main shaft of the processing machine rotates at high speed in this cutting, the middle part of the bar that is not gripped by the chuck and the finger chuck easily falls due to its own weight. When the axis does not coincide with the axis of rotation of the main shaft, the rod is swung around, causing rotational runout.

In order to prevent such rotational runout, a bar feeder is usually provided in the material feeder (see Patent Document 1).

This type of anti-vibration device includes a bar supporting unit that rotatably supports a bar, and the bar supporting unit includes a contact member that is arranged around the bar and is capable of contacting the bar. It is possible to displace the size of the space formed inside the plurality of contact members depending on the arrangement of the contact members, the bar is passed through the space, and before the bar is chucked by the processing machine, The structure is such that the size of the space is displaced so that a part of each contact member is pressed against the bar material so that the axis of the bar material coincides with the axis of rotation of the main shaft.

Such an anti-vibration device has an effect that it is possible to realize a material feeder having a bar material centering function simply and reliably without making a large modification to the conventional anti-vibration device. ..

JP, 2016-159422, A

However, in the conventional anti-vibration device, as shown in FIG. 14, a bush member 180 made of an elastic body is attached to the contact member 170 so as to be sandwiched by bearings 173 and 173 in order to reduce vibration and noise. Therefore, when an external force is applied to the bush member 180 in the axial direction from a material or the like, the brim portion 181 receives the external force to function to prevent the bush member 180 from coming off. As shown in FIG. 14, there is a problem in that the brim portion 181 may be largely deformed to come off the bearings 173 and 173.

Therefore, the present invention has been made to solve the above-mentioned problems, and the bush member does not have to be a bearing even when a large external force is applied to the bar without significantly improving the conventional vibration isolator. It is an object of the present invention to provide a vibration isolator that does not come off.

In order to solve the above problems, a vibration-damping device according to the present invention is a vibration-damping device for a bar member that is chucked in a processing machine and is rotated by a spindle, and a bar that rotatably supports the bar member. A rod supporting unit, wherein the rod supporting unit has a contact member into which the rod is inserted and which can contact the rod, and the rod inserted into the contact member depending on the arrangement of the contact member. Or the contact member is positionable with respect to the rod member, the contact member includes a bush member made of an elastic body, and the bush member is made of a material having higher mechanical strength than the bush member. It is characterized by including a reinforcing body.

Further, in the vibration damping device according to the present invention, it is preferable that the bush member is formed in a substantially annular shape and has a brim portion that protrudes in a radial direction and can be attached to the rod supporting unit.

Further, in the anti-vibration device according to the present invention, it is preferable that the reinforcing body includes an annular portion that extends in the circumferential direction of the brim portion and a detent portion that projects in the axial direction.

Further, in the anti-vibration device according to the present invention, it is preferable that the detent portion has a retaining means at a tip thereof.

Further, in the anti-vibration device according to the present invention, it is preferable that the reinforcing body is attached along the axial direction of the bush member.

Further, in the anti-vibration device according to the present invention, it is preferable that the reinforcing body is formed by being embedded in the bush member.

According to the present invention, it is possible to prevent the bush member from slipping out of the contact member even when a large force is applied to the bar without causing whirling of the bar without making a significant improvement. You can

The schematic diagram of the material supply machine visually recognized from the front. It is a schematic diagram which shows the example of supply of the bar|burr in a material supply machine, FIG.2(a) is a structural example of a material supply machine, FIG.2(b) is an enlarged view of the A section of FIG.2(a). The front view which shows the structural example of a vibration isolator. The block diagram for demonstrating the structure of a vibration isolator. The front view for demonstrating operation|movement of an anti-swing device. The front view for demonstrating the structure of a contact member. FIG. 7 is a sectional view taken along line BB in FIG. 6. The partial cross section figure of a bush member. An exploded view for explaining composition of a bush member. A partially enlarged view of the reinforcing body. The partially expanded view which shows the modification of a reinforcement body. Sectional drawing which shows the state in which the external force was applied to the bush member. The partial cross section figure which shows the modification of a bush member. Sectional drawing which shows the state in which the external force was applied to the conventional bush member.

Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. It should be noted that the following embodiments do not limit the invention according to each claim, and all combinations of the features described in the embodiments are not necessarily essential to the solution means of the invention. ..

FIG. 1 is a schematic diagram of a material feeder viewed from the front, FIG. 2 is a schematic diagram showing an example of supplying a bar material in the material feeder, and FIG. 2A is a configuration example of the material feeder, 2B is an enlarged view of the portion A of FIG. 2A, FIG. 3 is a front view showing a configuration example of the vibration isolator, and FIG. 4 is a view for explaining the configuration of the vibration isolator. 5 is a front view for explaining the operation of the anti-vibration device, FIG. 6 is a front view for explaining the structure of the contact member, and FIG. 7 is a view of FIG. 8 is a sectional view taken along line BB, FIG. 8 is a partial sectional view of the bush member, FIG. 9 is an exploded view for explaining the configuration of the bush member, and FIG. 10 is a partially enlarged view of the reinforcing body. Fig. 11 is a partially enlarged view showing a modified example of the reinforcing body, Fig. 12 is a sectional view showing a state in which an external force is applied to the bush member, and Fig. 13 is a modified example of the bush member. FIG.

The material supply machine M of the present embodiment supplies a material to a material processing machine called a lathe (hereinafter referred to as “processing machine 50 ”) as an example, and is arranged adjacent to the processing machine 50. It

As shown in FIG. 1, the material supply machine M includes a main body 5 for supplying the bar material 2 as a material to the processing machine 50, and a base 7 for supporting the main body 5 at a predetermined height.

The main body 5 includes a bar material holding portion 10 that holds the bar material 2 supplied from the outside, and a bar material feeding portion 20 that sends the bar material 2 to the processing machine, and is held by the bar material holding portion 10. The rod material 2 is delivered to the processing machine 50 by the rod delivery part 20.

The main body 5 is provided with a bar material supply unit (not shown) that appropriately supplies the bar material 2 supplied from the outside to each bar material holding unit 10, but since it is conventionally known, its details are omitted.

On the other hand, the processing machine 50 includes a cylindrical main shaft 51 through which the bar 2 can pass, and the main shaft 51 is provided with a chuck 53 that holds the tip of the bar 2. The rod 2 is rotated while being held by the chuck 53, and is processed by a predetermined cutting tool (for example, a cutting tool) not shown.

As shown in FIG. 1, the bar material holding portion 10 includes a holder 13 formed in a substantially semicircular shape on the base 7 and extending in the longitudinal direction thereof. It is sent to the main shaft 51 of the processing machine 50 by being sent along to the processing machine side.

Although not shown, for example, the bar material 2 is supplied to the holder 13 from the bar material supply shelf for mounting the bar material 2 supplied from the outside by the bar material supply unit.

The bar feeding unit 20 includes a pushing tool 31 for conveying the bar 2 received by the holder 13 to the processing machine.

The pusher 31 includes, for example, a slider 33 having a circular cross section that can freely move back and forth along the longitudinal direction of the holder 13, a push rod 34 that is arranged in front of the slider 33 and pushes out the bar material 2, and a push rod 34. A finger chuck 35 is disposed in front of the push rod 34 via a bearing and holds a rear end portion of the rod 2.

Then, as shown in FIGS. 2A and 2B, the rear end of the bar 2 is gripped by the finger chuck 35, and the push rod 32 is pushed out by the movement of the slider 33. Is gripped by the chuck 53 of the processing machine 50 and delivered to the processing machine side until it is abutted against the stopper 54.

The slider 33 is controlled to move back and forth in the holder 13 by a driving means (not shown), and the rod 2 is sent to the processing machine by moving the push rod 34 forward. This driving means is conventionally known. Therefore, the description thereof will be omitted.

Further, as shown in FIG. 1, in front of the holder 13, a rod supporting unit 60 (a vibration isolator of the present application) for rotatably supporting the rod 2 is provided. 2 whirling is prevented.

As shown in FIG. 3, the rod supporting unit 60 has a hole 61 through which the diameter of the hole through which the rod 2 passes can be displaced, and the rod 2 extruded by the pusher 31 passes through the hole 61. Then, while being rotatably supported by the hole portion 61, it is delivered to the spindle 51 of the processing machine 50.

As shown in FIG. 4, the rod supporting unit 60 is provided with a plurality of contact members 70, 70, 70 in which the above-mentioned holes 61 are formed and the holes 61 are arranged coaxially. It is preferable to arrange at least three contact members 70. Further, among the plurality of contact members 70, 70, 70, the contact members 70 arranged at both ends in the axial direction are different from the contact member 70 arranged in the center, as shown in FIG. Are inclined at the same angle (120°) from the bottom to the left and right. That is, the plurality of contact members 70, 70, 70 are evenly arranged around the rotation axis of the main shaft.

Further, as shown in FIG. 3, the contact member 70 is assembled so as to be swingable around a rotation shaft 71, and the respective contact members 70, 70, 70 are connected by a link member 72, and any contact is made. When the member 70 receives a driving force from a driving source (not shown) and swings about the rotation shaft 71 as a fulcrum, the swing is transmitted to another contact member 70 and swings in the same direction by the same amount. Is configured.

As shown in FIG. 5, the bar member supporting unit 60 configured as described above is displaced by swinging the contact member 70 so that the space formed by the hole 61 formed inside the contact member 70 is displaced. By adjusting the overlapping degree of the hole portions 61 according to the outer diameter shape of the rod member 2, the size of the space formed by the hole portions 61 is displaced and the rod member 2 is moved by the space. It supports and functions as a vibration isolator for the bar 2.

Further, as shown in FIG. 6, the contact member 70 is formed with a rotary shaft hole 71 a through which the rotary shaft 71 is inserted and a link mounting portion 72 a to which the link member 72 is mounted. The bush member 80 attached to the inner circumference is provided.

As shown in FIG. 7, the bush member 80 is attached so as to be sandwiched by a pair of bearings 73, 73 arranged in the hole 61 of the contact member 70. More specifically, the bush member 80 has a flange. The portion 81 is sandwiched between the bearings 73, 73.

The bush member 80 is made of an elastic material such as urethane or rubber, is formed in a substantially annular shape, and has a brim portion 81 protruding in the radial direction. A reinforcing body 90 made of a material having high strength (for example, iron or steel) is attached.

As shown in FIG. 9, the reinforcing body 90 has an annular portion 91 extending along the circumferential direction of the brim portion 81, an axially protruding portion from the annular portion 91, and an intermittently formed circumferential direction. And a plurality of detent portions 92 that are formed on the bush member 80. The detent portions 92 are axially inserted into the mounting holes 82 formed in the brim portion 81 of the bush member 80 to be attached to the bush member 80. There is.

As shown in FIG. 10, the detent portion 92 has an arcuate tip end so as to be easily inserted into the mounting hole 82 and not to damage the mounting hole 82. The shape of the rotation stopping portion 92 is not limited to such a shape, and a barb 93 may be formed at the tip as a retaining means, as shown in FIG. 11, for example.

As described above, by assembling the reinforcing body 90 to the bush member 80 along the axial direction, even when the bush member 80 is worn or the like and needs to be replaced, the reinforcing body 90 can be replaced. It can be reused and the running cost can be reduced.

In the rod supporting unit 60 (vibration preventing device) according to the present embodiment thus formed, as shown in FIG. 12, an external force along the axial direction is applied to the bush member 80 by pushing the rod. Even in the case, since the reinforcing body 90 is attached to the brim portion 81, the annular portion 91 of the reinforcing body 90 prevents the brim portion 81 from being deformed by an external force, and the bush member 80 is disengaged from the bearings 73 and 73. It can be prevented. Further, since the rotation stopping portion 92 is inserted into the brim portion 81, it is possible to prevent the reinforcing body 90 and the bush member 80 from relatively rotating even when the rod is subjected to a rotational force. it can.

The reinforcing body 90 is not limited to being attached to the bush member 80 in the axial direction, but as shown in FIG. 13, for example, the reinforcing body 90 ′ is embedded in the brim portion 81 at the time of molding the bush member 80 to be integrated. I don't mind. As a method of integrating the reinforcing member 90 ′ with the bush member 80, the reinforcing member 90 ′ is placed in a mold for molding the bush member 80 in advance, and molten resin is injected to form the brim of the bush member 80. For example, a method of insert-molding the reinforcing body 90 ′ on the portion 81 can be performed. Furthermore, when insert-molding the reinforcing body 90 ′ to the brim portion 81 of the bush member 80, the reinforcing body 90 ′ may have at least an annular portion, and the rotation retaining portion can be formed as necessary.

When the reinforcing body 90' is integrated with the brim portion 81 in this manner, the detent portion 92 and the bush member 80 are brought into close contact with each other, so that the mechanical strength is increased and the mechanical strength is removed from the bearing when a larger external force is applied. Can be prevented.

Note that the present application is not limited to this embodiment, and can be implemented in various forms. For example, in the present embodiment, three contact members are used to form the hole, but the number of holes is not limited to the number of contact members.

Further, although the bar support unit 60 of the present embodiment is attached integrally with the material feeder M, it may be provided separately.

M material feeder 2 bar material 10 bar material holding part 50 processing machine 51 main shaft 60 bar material support unit 61 hole part 70 contact member 71 rotating shaft 72 link member 73 bearing 80 bush member 81 brim part 82 mounting hole 90, 90' Reinforcement body 91 Annular portion 92 Rotating portion

Claims (6)

A bar vibration isolator that is chucked in a processing machine and rotated by a spindle.
A rod supporting unit that rotatably supports the rod,
The bar support unit is
The bar member is inserted, and a contact member that can contact the bar member is provided,
Depending on the arrangement of the contact member, the bar member inserted into the contact member can be held or the contact member can be positioned with respect to the bar member,
The contact member includes a bush member made of an elastic body,
The anti-vibration device, wherein the bush member includes a reinforcing body made of a material having higher mechanical strength than the bush member. The anti-vibration device according to claim 1,
The anti-vibration device is characterized in that the bush member is formed in a substantially annular shape and has a brim portion that protrudes in a radial direction and can be attached to the rod supporting unit. The anti-vibration device according to claim 2,
The anti-vibration device, wherein the reinforcing body includes an annular portion extending in a circumferential direction of the brim portion and a rotation stopping portion protruding in an axial direction. The anti-vibration device according to claim 3,
The anti-sway device comprises a retaining means at a tip end thereof. The anti-vibration device according to claim 3 or 4,
The anti-vibration device, wherein the reinforcing body is attached along the axial direction of the bush member. The anti-vibration device according to any one of claims 1 to 4,
The anti-vibration device, wherein the reinforcing body is formed by being embedded in the bush member.

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