JP2003117760A - Workpiece conveying device for machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a workpiece conveying device for a machine tool provided with a seal mechanism of high durability while preventing the intrusion of chips or the like. SOLUTION: This workpiece conveying device 5 for the machine tool is provided with a frame member 6 extending from a machining position to a carry-in/out position of the workpeice W; a workpiece grip mechanism 7 for gripping the workpiece W; a support member 8 for supporting the workpiece grip mechanism 7 to the frame member 6 movably along the frame member 6; and a drive mechanism 9 for moving the support member 8 along the frame member 6. The frame member 6 and the support member are surrounded by a cover member 24. The cover member 24 is formed with a slit groove 30 allowing the support member 8 to pass through outward and to move, and provided with the seal mechanism 33 for closing the slit grooves 30 over the whole length and opening the slit groove 30 part where the support member 8 is positioned following the movement of the support member 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work transfer device for a machine tool that transfers a work (including a material before machining in this specification) between a machining position and a loading / unloading position.

[0002]

2. Description of the Related Art In a machine tool, such as a lathe, a work finished at a machining position is received from a chuck of a spindle and is carried out to a work stocker arranged at a carry-in / out position on the machine side. There may be a case where a work transfer device is provided for automatically performing a work such as receiving a material from the work stocker side and mounting it on the chuck.

As this work transfer device, there is one in which a work catcher (work holding mechanism) for holding a work is slidably supported by a frame member from a machining position of the work to a loading / unloading position. A bellows type cover made of rubber or the like is attached to a slide portion that slidably supports the work catcher to prevent chips and cutting fluid from entering.

[0004]

However, in the case of the structure in which the conventional bellows type cover is attached, there is a problem that chips are caught in the bellows part of the cover and the cover is easily damaged.

The present invention has been made in view of the above problems of the conventional device, and provides a work transfer device for a machine tool having a highly durable seal mechanism capable of preventing intrusion of chips and the like. Is an issue.

[0006]

According to a first aspect of the present invention, there is provided a frame member extending from a machining position of a work to a loading / unloading position, a work holding mechanism for holding the work, and the work holding mechanism for the frame member. A work transfer device for a machine tool, comprising: a support member that movably supports along a frame member; and a drive mechanism that moves the support member along the frame member, wherein the frame member and the support member are surrounded by a cover member. , The cover member is formed with a slit groove that penetrates the support member outward and that enables the movement, and the slit groove is closed over the entire length,
Moreover, a seal mechanism is provided, which opens a slit groove portion in which the support member is located as the support member moves.

According to a second aspect of the present invention, in the first aspect, the sealing mechanism includes a spring plate made of a thin metal plate having elasticity, and the spring plate closes the slit groove with a spring force. It is characterized in that it is disposed and is raised in the opening direction by the support member in accordance with the movement of the support member to open the slit groove portion in which the support member is located.

According to a third aspect of the present invention, in the second aspect, the spring plate is divided into a plurality of parts in the moving direction, and the end portions of the spring plates are overlapped with each other.

According to a fourth aspect of the present invention, in the second or third aspect, an inclined surface for smoothing the action of causing the spring plate is formed at the end portion in the moving direction of the support member.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, chips or the like enter the sliding groove between the supporting member and the frame member through the slit groove in the slit groove portion of the cover. It is characterized in that a labyrinth mechanism for suppressing the is formed.

[0011]

According to the invention of claim 1, the slit groove for penetrating the support member outward from the cover member surrounding the frame member and the support member is closed over the entire length, and the support member is moved. Since a slit groove portion in which the supporting member is located is provided with a seal mechanism, chips and the like can be prevented from entering the inside of the cover through the slit groove, and the seal mechanism can be made of metal easily. And
For example, the durability can be improved as compared with the conventional rubber bellows.

According to the second aspect of the present invention, the sealing mechanism is constructed so that the slit groove is closed by the spring plate made of a thin metal plate having elasticity. Therefore, the slit groove is formed by the spring force of the spring plate. As a result, it is possible to reliably block, and as a result, it is possible to reliably prevent chips and the like from entering through the slit groove, and since the seal mechanism is composed of a spring plate made of a thin metal plate, the durability of the seal mechanism is improved. You can

According to the third aspect of the invention, since the spring plate is divided into a plurality of parts in the moving direction and the ends of the spring plates overlap each other, the slit groove can be more reliably sealed. That is, at the portion where the support member is located, the spring plate rides on the surface of the support member and abuts against the surface for sealing, but since the spring plate is divided, the spring plate opens the slit groove from the surface of the support plate. The shape of the edge portion is accurately followed and abutted to prevent the occurrence of a gap as much as possible and enhance the sealing property.

According to the invention of claim 4, since the inclined surface for smoothing the action of causing the spring plate is formed at the end portion in the moving direction of the support member, the spring plate can easily ride on the inner surface of the support member, Smooth movement and sealing performance can be secured.

According to the invention of claim 5, since the labyrinth mechanism is provided in the slit groove portion of the cover, when chips or the like enter the cover through the slit groove, the labyrinth mechanism drops the chips or the like. Therefore, it is possible to prevent chips and the like from entering the sliding portion between the support member and the frame member.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 4 are views for explaining a work transfer device for a machine tool according to an embodiment of the present invention, FIG. 1 is a perspective view of a lathe equipped with the work transfer device, and FIG. FIG. 3 is a front view of the work transfer device portion, FIG. 3 is a sectional side view of the work transfer device, and FIG. 4 is a detailed view of a main part of the sealing mechanism.

In these drawings, reference numeral 1 is a lathe which is entirely surrounded by a machine body cover 4 and in which the apparatus of this embodiment is provided. This lathe 1 has a first spindle 2 arranged at a machining position A inside a machine body cover 4.
a, a second spindle 2b, and chucks 3a and 3b, respectively.
Have. Reference numeral 4a is a door that opens and closes the machined position A portion of the machine body cover 4.

Inside the machine body cover 4, an in-machine traveling type work transfer device 5 is arranged. The work transfer device 5 includes a frame member 6 extending from the machining position A to a loading / unloading position B located outside the machine, a work catcher (work gripping mechanism) 7 that holds a work, and the work catcher 7 to the frame. The member 6 is provided with a support member 8 that supports the member 6 so as to be movable in the axial direction, and a drive mechanism 9 that moves the support member 8 along the frame member 6. The loading / unloading position B is provided with a work stocker 10 for storing the processed work and the material before the processing, a conveyor 11 for carrying out the processed work, a work bucket 12, and the like.

The frame member 6 is made of an iron square pipe having a rectangular cross section, extends from above the machining position A to above the carry-in / out position B, and is fixed to the machine body. A rail member 13a, which constitutes a support member of the linear guide mechanism 13, is fixed to the bottom surface 6a of the frame member 6. The rail member 13a has a length corresponding to the moving range of the work catcher 7, and is specifically set to be slightly shorter than the frame member 6.

The support member 8 includes a lateral side portion 8a arranged in parallel with the bottom surface 6a of the frame member 6, a lower vertical side portion 8b extending vertically downward from the machine inner end portion thereof, and a machine outer end portion thereof. And an upper vertical side portion 8c that extends vertically upward from the frame member 6, and has a vertically long rectangular shape when viewed in a direction perpendicular to the axis of the frame member 6.

Two sets of slide blocks 13b, 13b constituting a supported member of the linear guide mechanism 13 are mounted on the lateral side portion 8a at appropriate intervals in the moving direction, and each slide is mounted. The block 13b is slidably supported by the rail member 13a. Thereby, the support member 8 is supported by the frame member 6 so as to be movable in the axial direction thereof.

A support bracket 8d is fixed to the machine outer side surface (left side surface in FIG. 3) of the lower vertical side portion 8b of the support member 8, and the work catcher 7 is attached to the support bracket 8d.
Is fixed. The work catcher 7 includes a base plate 14 fixed to the front end surface 8e of the support bracket 8d, a cylinder 15 fixed to a support boss 14a protruding from the base plate 14, and the cylinder 1
Moving plate 1 connected to piston rod 15a of 5
6 and a movable claw mechanism 17 mounted on the moving plate 16.
It has and.

The movable claw mechanism 17 holds the work W by expanding and contracting the grip claws 17a, 17a by a built-in cylinder mechanism. In addition, 18 is a guide rod for guiding the forward / backward movement of the moving plate 16,
The tip of the guide rod 18 is fixed to the moving plate 16, and an intermediate portion thereof is slidably supported by the support boss portion 14a.

The upper vertical side portion 8c of the support member 8 extends above the front surface 6b of the frame member 6, and a belt connecting portion 19 is formed at the upper end portion thereof. The belt connecting portion 19 is formed by fixing the sandwiching plates 19b and 19b with bolts 19c with the spacer 19a interposed on the inner surface of the upper vertical side portion 8c. The belt 20 is sandwiched and fixed by the sandwiching plates 19b and 19b.
The support member 8 and thus the work catcher 7 are moved by driving.

The drive mechanism 9 is a driven pulley 21 rotatably disposed at one end of the upper surface 6c of the frame member 6.
The belt 20 is wound around a drive pulley 22 arranged outside the other end, and the drive pulley 22 is rotated by a drive motor 23.

The bracket 21a supporting the driven pulley 21 is connected to the bracket on the frame member side by an adjusting bolt 21b, and the pulley shaft distance can be adjusted by rotating the adjusting bolt 21b. In this way, the belt tension is adjusted.

The work transfer device 5 of this embodiment is surrounded by a transfer cover 24. The transfer unit cover 24 includes a front cover 25 that covers the front side (left side in FIG. 3) of the work transfer device 5, a rear upper cover 26 and a rear lower cover 27 that cover upper and lower rear sides, and a removable upper cover. And a cover 28.

Here, the drive mechanism 9 is the driven pulley 2
From 1 to the drive pulley 22, the front side, the rear side, and the upper side are covered with the front cover 25, the rear upper cover 26, and the upper cover 28 over the entire length, and the lower side is covered with the frame member 6. There is.

The front side of the rail member 13a is covered with the front cover 25 over the entire length thereof, and the lower side of the bottom member 2 is formed by bending the lower end of the front cover 25 inward.
5a, and the upper side is covered by the frame member 6. Furthermore, the rear side of the rail member 13a is covered with an inner cover 29 over the entire length thereof, and the inner cover 29 is fixed to the bottom surface 6a of the frame member 6 by, for example, bolting.

The upper vertical side portion 8c of the support member 8 is located between the front cover 25 and the front surface 6b of the frame member 6, and the horizontal side portion 8a is the bottom cover 25a.
And the bottom surface 6a of the frame member 6 are located. The lower vertical side portion 8b of the support member 8 projects downward from a slit groove 30 which is a gap formed between the inner end of the bottom cover 25a and the inner surface of the rear lower cover 27. The slit groove 30 extends over the entire length of the rail member 13a,
That is, it is formed over the moving range of the supporting member 8, and the rear lower cover 27 also extends over the moving range of the supporting member 8.

Here, the inner cover 29 is located substantially toward the center of the slit groove 30. Some of the chips and the like that have entered from the slit groove 30 hit the upper portion of the inner surface of the rear lower cover 27 and fall downward, and most of the remaining chips and the like that have not fallen hit the back surface of the inner cover 29 and fall. And chips are slit groove 3
A labyrinth mechanism is configured to prevent the entry of the sliding portion between the support member 8 and the frame member 6, that is, the sliding portion between the rail member 13a and the slide block 13b through 0.

A gap between the front cover 25 and the front surface 6b of the frame member 6 is sealed by an upper sealing mechanism 32. The upper sealing mechanism 32 is a spring plate (plate member) 32a made of a plurality of elastic metal thin plates arranged side by side in the axial direction (moving direction) of the frame member 6.
It is composed of. One end of each spring plate 32a is attached to a bracket 6d fixed to the upper surface of the frame member 6 by a bolt 32b.
The other end is in contact with the inner surface of the front cover 25 with a biasing force. Further, adjacent spring plates 32a
Both ends 32c of the are overlapped with each other. A portion of each of the spring plates 32a facing the upper vertical side portion 8c of the support member 8 is raised by the upper vertical side portion 8c and rides on and contacts the inner surface of the vertical side portion 8c.

The spring plate 32a is provided at both end portions of the upper vertical side portion 8c in the moving direction opposite to the spring plate 32a.
An inclined surface 8f is formed to facilitate riding on the vehicle.
The inclined surface 8f is inclined so as to be closer to the front cover 25 on the front side in the moving direction (see FIG. 4).

A lower seal mechanism 33 for sealing the slit groove 30 is provided in the slit groove 30. The lower seal mechanism 33 is composed of a plurality of spring plates (plate members) 33a made of metal having elasticity and arranged side by side in the axial direction (moving direction) of the frame member 6. One end of each spring plate 33a is fastened and fixed to the rear lower cover 27 with a bolt 33b, and the other end abuts the inner end of the bottom cover 25a with a biasing force. Both ends 33c of the adjacent spring plates 33a are superposed on each other. A portion of each spring plate 33a facing the lower vertical side portion 8b of the support member 8 is raised by the lower vertical side portion 8b and rides on and abuts on the inner surface of the lower vertical side portion 8b.

The spring plate 33a is provided at a portion of the lower vertical side portion 8b opposite to the spring plate 33a in the moving direction.
An inclined surface 8g is formed to facilitate riding on the vehicle.
The inclined surface 8g is inclined so that the front side in the moving direction is closer to the inner end 25a 'of the bottom cover 25a.

Next, the function and effect of the apparatus of this embodiment will be described.

The belt 2 is driven by the rotation of the drive motor 23.
When 0 pulls the support member 8, the support member 20 moves in the axial direction of the rail member 13a, and the work catcher 7 is positioned at the machining position A, the cylinder 15 extends and the center of the gripping claws 17a, 17a. Is the same as the first and second spindles 2a and 2b, and the movable claw mechanism 17 has a grip claw 17a,
The work W is gripped by advancing 17a.
Subsequently, the chuck 3a or 3b is released, and in this state, the work catcher 7 moves a little in the axial direction of the frame member 6 to pull out the work W in the axial direction, and then the cylinder 15 contracts so that the gripping claws 17a, 17a are released. Ascend to the position shown in FIG. Subsequently, the belt 20 moves the work catcher 7 to the carry-in / carry-out position B by the rotational driving of the motor 23, and the processed work W is carried out of the machine. It should be noted that the mounting of the material is performed in the reverse flow of the above-mentioned work unloading.

In the upper sealing mechanism 32, the tip end of each spring plate 32a abuts on the inner surface of the front cover 25 with a spring force, and thereby passes between the front cover 25 and the front surface 6b of the frame member 6. Chips are prevented from falling. At the portion where the upper vertical side portion 8c of the support member 8 is located, the spring plate 32a rides on the upper vertical side portion 8c and contacts the inner surface of the upper vertical side portion 8c.

In the lower seal mechanism 33, the tip of each spring plate 33a is in contact with the inner end of the bottom cover 25a by a spring force, whereby the slit groove 30 is formed.
Chips and the like are prevented from entering the sliding portion between the rail member 13a and the slide block 13b through the passage. Then, at the portion where the lower vertical side portion 8b of the support member 8 exists, the spring plate 3
3a rides on the lower vertical side portion 8b and contacts the inner surface of the lower vertical side portion 8b.

When the support member 8 and thus the work catcher 7 are driven in the axial direction of the rail member 13a in such a sealed state, the upper vertical side portion 8c and the lower vertical side portion 8 are formed.
b is the spring plates 32a, 3 located on the front side in the moving direction.
3a is raised and moves while riding. At this time, inclined surfaces 8f are formed at both ends of the upper vertical side portion 8c, and the lower vertical side portion 8c is formed.
Since the inclined surfaces 8g are formed at both ends of b, the above riding is smoothly performed. The spring plate 3 located on the rear side in the moving direction
The springs 2a and 33a come into contact with the inner surface of the front cover 25 and the inner end of the bottom cover 25a by the spring force, and return to the sealed state.

As described above, in the present embodiment, the work transfer device 5 is provided with the transfer portion cover (cover member) 24 made of a metal plate.
A slit groove portion 30 which is surrounded by a slit and which penetrates the support member 8 outward from the transport section cover 24 is closed over the entire length, and the support member 8 is located as the support member 8 moves. Since the lower sealing mechanism 33 that is opened is provided, chips and the like can be prevented from entering the inside from the slit groove 30. In addition, similarly, the upper sealing mechanism 32 can prevent the intrusion of chips and the like falling from the upper side.

In addition, the lower seal mechanism 33 is formed by a spring plate 33a made of a thin metal plate having elasticity in the slit groove 30.
Since the slit groove 30 is configured to be closed, the slit groove 30 can be surely closed by the spring force of the spring plate 33a, and as a result, chips and the like can be reliably prevented from entering from the slit groove 30. Further, since the seal mechanism 33 is composed of the spring plate 33a made of a thin metal plate, the durability of the seal mechanism 33 can be enhanced. The upper seal mechanism 32 can be surely sealed in the same manner, and the durability of the seal mechanism 32 can be improved.

Since the spring plate 33a is divided into a plurality of parts in the moving direction and the ends of the spring plates 33a overlap each other,
The slit groove 30 can be sealed more reliably. That is, at the portion where the support member 8 is located, sealing is performed by the spring plate 33a riding on and contacting the inner surface of the support member 8, but since the spring plate 33a is divided, the spring plate 33a is separated from the surface of the support plate 8. The shape of the opening edge portion of the slit groove 30 can be accurately followed and contacted, a gap can be prevented from occurring, and sealing performance can be improved. In addition, the sealing property of the upper side seal mechanism 32 can be similarly improved.

Further, an inclined surface 8g for smoothing the action of raising the spring plate 33a at the end of the support member 8 in the moving direction.
Since the spring plate 33a is formed, it is easy for the spring plate 33a to ride on the inner surface of the support member 8, and smooth movement and sealing performance can be secured.
The upper seal mechanism 32 can also ensure smooth movement and sealing performance.

Further, since the labyrinth mechanism is provided in the slit groove 30 portion, when the chips and the like enter the cover through the slit groove 30, the labyrinth mechanism can drop the chips and the like. It is possible to prevent chips and the like from entering the sliding portion between the slide block 13b of the member 8 and the rail member 13a on the frame member 6 side.

[Brief description of drawings]

FIG. 1 is a perspective view of a lathe (machine tool) including the device of the present embodiment.

FIG. 2 is a front view of a work transfer device.

FIG. 3 is a cross-sectional side view of the work transfer device.

FIG. 4 is a schematic enlarged view of an upper sealing mechanism portion of the work transfer device.

FIG. 5 is a schematic enlarged view of a lower sealing mechanism portion of the work transfer device.

[Explanation of symbols]

5 Work transfer device 6 frame members 7 Work catcher (work gripping mechanism) 8 Support members 8e inclined surface 9 Drive mechanism 24 Transport unit cover member 30 slit grooves 33 Sealing mechanism 33a Spring plate A Work processing position B Work loading / unloading position W work

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshinobu Okuyama             106 Kita-Koriyama-cho, Yamato-Koriyama-shi, Nara Stock             Mori Seiki Co., Ltd. (72) Inventor Shoichi Arano             82 Chi, Minamimorimoto-cho, Kanazawa, Ishikawa Prefecture Co., Ltd.             In Issey F-term (reference) 3C011 DD00                 3C033 HH14 HH22 PP02                 3C045 FB03 HA02

Claims (5)

[Claims] 1. A frame member extending from a machining position of a work to a loading / unloading position, a work gripping mechanism for gripping a work, and a support for supporting the work gripping mechanism on the frame member so as to be movable along the frame member. In a work transfer device of a machine tool, comprising a member and a drive mechanism for moving the support member along the frame member, the frame member and the support member are surrounded by a cover member, and the support member is provided outside the cover member. A slit groove is formed which allows the above-mentioned movement and allows the above-mentioned movement, the slit groove is closed over the entire length, and the slit-groove portion in which the support member is located is opened as the support member moves. A work transfer device for machine tools, which is provided with a sealing mechanism. 2. The seal mechanism according to claim 1,
Equipped with a spring plate made of a thin metal plate having elasticity,
The spring plate is arranged so as to close the slit groove with a spring force, and is raised in the opening direction by the support member in accordance with the movement of the support member to open the slit groove portion where the support member is located. A work transfer device for machine tools. 3. The work transfer device for a machine tool according to claim 2, wherein the spring plate is divided into a plurality of parts in the moving direction, and the end parts of the spring plates overlap each other. 4. The work transfer device for a machine tool according to claim 2, wherein an inclined surface for smoothing the action of causing the spring plate is formed at an end portion of the support member in the moving direction. . 5. The labyrinth according to claim 1, wherein chips and the like are prevented from entering the slit groove portion of the cover through a slit groove and into a sliding portion between the support member and the frame member. A work transfer device for a machine tool, wherein a mechanism is formed.