JPH0731741U - Material feeder - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a bush having a structure capable of reversing the feeding direction by a moving clamp portion by simply replacing the piston of an actuating valve in a feeding device. [Structure] The operation valve 60 includes a first passage P through which air is constantly supplied,
A second passage P1 into which air selectively enters from the control valve, a third passage A connected to a drive cylinder for moving the moving clamp portion, and a passage R open to the atmosphere are in communication. The bush 50 in the valve has seal portions B1 and B2 on both sides with openings at both ends. The passage A opens between both seals, and the passage R connects with the seal B2.
Open to P1. (a) In the case of the first valve body 61, when the control valve supplies air to the passage P1, air is released from one end of the drive cylinder via the passages A and R, and the moving clamp moves in a predetermined direction. . (b) In the case of the second valve body 62, if the control valve supplies air to the passage P1, the air from the passage P will pass through the passage A.
Is supplied to one end of the drive cylinder through the moving cylinder, and the moving clamp moves in the direction opposite to the predetermined direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a material feeding device that clamps or releases a material to be processed and conveys the material while repeatedly reciprocating at a predetermined timing by a drive cylinder and a clamp that are operated by pressure fluid.

[0002]

[Prior art]

 FIG. 3 shows a conventional material feeding device 1 (hereinafter, abbreviated as feeding device 1) that operates by compressed air (hereinafter abbreviated as air) as a pressure fluid. The feeding device 1 is for intermittently conveying the strip-shaped material 10 to the processing machine. The main body 2 of the feeding device 1 is provided with a fixed clamp part 3 for selectively sandwiching the material 10 when processing the material 10.

A guide holder 5 is connected to the main body 2 via a pair of guide bars 4 and 4 which are parallel to the conveying direction of the material 10. The guide holder 5 is a plate-shaped member having a longitudinal direction that is a direction that is orthogonal to the transport direction of the material 10. At both ends of the guide holder 5, introduction roller portions 6 for guiding the upper and lower surfaces of the material 10 are attached. Further, on the upper surface of the guide holder 5, a pair of guide rollers 7 for guiding both ends of the material 10 are provided.

A moving clamp portion 8 is provided on the guide rod 4, and is reciprocally movable between the main body 2 and the guide holder 5. The moving clamp unit 8 selectively holds and moves the material 10, and intermittently conveys the material 10 in a predetermined direction according to the processing operation of the processing machine. These operations of the device are carried out by the air supplied into the main body 2.

The feeding device has an air circuit as shown in FIGS. 4 and 5. In this air circuit, there are provided a fixed clamp part 3 for holding and releasing the material 10, a moving clamp part 8 for holding and releasing the material 10, and a drive cylinder 9 for reciprocating the moving clamp part 8. . The fixed clamp part 3 is operated by a double-acting cylinder. The moving clamp part 8 is operated by a single-acting cylinder having a returning means such as a spring. The drive cylinder 9 has a piston 11 that reciprocates in the barrel, and a rod 12 that is provided on one end surface of the piston 11 and projects outward from one end of the barrel. This rod 12 is the moving clamp. It is linked to the section 8. Reference numeral 20 in the figure denotes an actuating valve for controlling the drive cylinder 9, which has a structure in which a valve body 22a or 22b moves back and forth inside a cylindrical main body 21. The main body 21 of the present embodiment is formed by directly making a hole in the main body 2 of the feeding device 1, and is not a case where a tubular main body formed by another member is incorporated into the main body 2 of the feeding device 1. Absent.

A supply unit (not shown) for supplying air to the air circuit is connected to one end 9 a of the barrel of the drive cylinder 9 via an air supply path 23. The air supply path 23 is connected to the one end portion 20a of the main body of the operation valve 20 via a first passage P. Further, the air supply path 23 is connected to one end of the double-acting cylinder of the fixed clamp section 3. Compressed air (hereinafter referred to as air) is present at one end 9a of the barrel of the drive cylinder 9, the first passage P of the main body of the actuating valve 20, and one end of the double-acting cylinder of the fixed clamp portion 3. It is always supplied.

A supply unit (not shown) for supplying air to the air circuit is connected to a control valve 30 as a control means via an air supply path 23. The control valve 30 may be a pilot valve 30a or an electromagnetic valve 30b as shown in each drawing. The outlet side of the control valve 30 is connected to the other end of the double-acting cylinder of the fixed clamp part 3 and the single-acting cylinder of the moving clamp part 8, respectively, and the other end of the main body 21 of the actuating valve 20. It is connected to the portion 20b via the second passage P2.

The fixed clamp part 3 is configured to open the material when air is supplied from the control valve 30 and clamp the material when the air supply is cut off. The moving clamp part 8 is configured to sandwich the material when the air is supplied from the control valve 30 and open the material when the supply of the air is cut off.

As described above, the main body 21 of the actuating valve 20 is connected with the first and second passages P, P1 at both ends 20a, 20b thereof. Further, the main body 21 is formed with a pressure release passage R for releasing air to the outside of the circuit. Further, the main body 21 is formed with a third passage A for guiding the air supplied from the first passage P into the main body to the other end portion 9b of the drive cylinder 9. Reference numeral 24 in the drawing is a speed controller.

In the feeder 1 having the basic structure as described above, two types of feeders having different material feeding modes are used properly according to the application. First, it is a push-feed type that is installed on the material supply side of the processing machine and sends the material clamped by the moving clamp to the processing machine. The other is a tension type that is installed on the machined material delivery side of the machine and pulls the machined material held by the moving clamp from the machine.

Conventionally, in the feeder 1 having the common basic structure, the air switching structure is changed by exchanging both the bush 40 and the valve body 22 inside the operation valve 20. It constituted two types of feeding devices that acted.

First, in the case of a push-feed type feeding device, a bush 40a and a valve body 22a having a structure as shown in FIG. 6 (a) are mounted inside the main body 21, and as shown in FIG. 6 (b). It constituted a circuit as a working valve. With the operation valve having such a circuit, the operation as shown in FIG. 4 can be obtained. That is, as shown in FIG. 4 (a), when the actuation signal is not input and air is supplied to the other end 20b of the actuation valve 20, the valve body 22a of the actuation valve 20 moves toward the one end 20a side. It moves, so that the third passage A and the pressure release passage R communicate with each other. Since the third passage A communicates with the other end portion 9b of the drive cylinder 9, the air in the other end portion 9b of the drive cylinder 9 is discharged to the outside through the passage A, the working cylinder 20, and the pressure discharge passage R. It will be released. At this time, the fixed clamp part 3 is in an open state, and the movable clamp part 8 holds the material. Then, the piston 11 of the drive cylinder 9 moves to the other end portion 9b side, and the moving clamp portion 8 holds the material and moves to the main body 2 side to perform push-feed operation.

As shown in FIG. 4B, when a control signal is input to the control valve 30, air is not supplied to the moving clamp section 8, the fixed clamp section 3 and the actuation valve 20. The valve body 22a of the operation valve 20 moves to the other end 20b side, and the third passage A and the first passage P communicate with each other. The air supplied from the first passage P is guided to the other end 9b of the drive cylinder 9 via the passage A. The piston 11 of the drive cylinder 9, which is a double-acting cylinder, moves to the one end portion 9a side where the rod 12 is provided. At this time, the fixed clamp part 3 is closed and the movable clamp part 8 is open. Then, the moving clamp portion 8 retracts in the open state.

Further, in the case of a pulling type feed device, a bush 40b and a valve body 22b having a structure as shown in FIG. 7 (a) are mounted inside the main body 21, and as shown in FIG. 7 (b). It constituted a circuit as a simple actuating valve. With the operation valve having such a circuit, the operation as shown in FIG. 5 can be obtained. That is, as shown in FIG. 5 (a), when the actuation signal is not input and air is supplied to the other end 20b of the actuation valve 20, the valve body 22b of the actuation valve 20 moves to the one end 20a side. Therefore, the pressure release passage R is closed, and the third passage A and the first passage P communicate with each other. Since the third passage A communicates with the other end 9b of the drive cylinder 9, air is supplied into the other end 9b of the drive cylinder 9. At this time, the fixed clamp part 3 is in an open state, and the moving clamp part 8 holds the material. Then, the piston 11 of the drive cylinder 9, which is a double-acting cylinder, moves to the one end 9a side, and the moving clamp part 8 holds the material and moves away from the main body 2 to perform a pulling operation. .

As shown in FIG. 5B, when a control signal is input to the control valve 30, air is not supplied to the moving clamp portion 8, the fixed clamp portion 3 and the actuation valve 20. The valve body 22b of the operation valve 20 moves to the other end 22b side, and the third passage A and the pressure release passage R communicate with each other. The air in the other end portion 9b of the drive cylinder 9 is discharged to the outside through the passage A, the operation valve 20 and the pressure release passage R. At this time, the fixed clamp part 3 is in the closed state, and the movable clamp part 8 is open. Then, the piston 11 of the drive cylinder 9 moves to the other end portion 9b side, and the moving clamp portion 8 returns to the main body side to clamp the material.

[0016]

[Problems to be solved by the device]

 According to the above-mentioned conventional feeder, in order to obtain the push-feed type feed device and the pull-type feed device, dedicated bushes 40a, 40b and valve bodies 22a, 22b having different structures are required for each type. Met. Since the bush 40 has a structure in which it is press-fitted into the inner surface of the main body 21, it was impossible to replace it and switch the feeding direction. Therefore, the conventional feeding device is a dedicated machine that can be applied only in a fixed feeding direction, and the feeding direction cannot be changed due to the user's convenience, and there is a problem that it is not versatile.

An object of the present invention is to provide a bush having a structure capable of reversing the feeding direction by simply replacing the piston in the conventional actuating valve of the feeding device, and to improve the versatility of the feeding device. .

[0018]

[Means for Solving the Problems]

 The material feeding device according to claim 1 is a fixed clamp part that selectively holds and releases a work material, and a fixed clamp part that is reciprocally movable to selectively hold and release the work material. Moving clamp part, a supplying part for supplying a pressure fluid for driving the fixed clamping part and the moving clamp part, and a pressure fluid from the supplying part is constantly supplied to one end of the moving clamp part and the moving clamp part is moved. A drive cylinder equipped with a piston for controlling, a control unit for supplying or shutting off the pressure fluid supplied from the supply unit to the fixed clamp unit and the movable clamp unit, and reciprocating inside the valve body via a bush. The valve body is housed in the valve body, the first passage P for constantly supplying the pressure fluid from the supply unit is connected to one end of the valve body, and the control unit is connected to the other end of the valve body. Pressure flow from Is connected to a second passage P1 for supplying the pressure fluid supplied from the first passage P to the valve body when the pressure fluid from the second passage P1 is blocked. A material feeding device having a third passage A leading to an end and an operation valve having a pressure discharge passage R for releasing the pressure of the pressure fluid formed in the valve body. The first and second openings communicating with the first and second passages P and P1, respectively, are provided at both ends in the axial direction, and the valve is provided at two positions on the inner peripheral surface having different axial positions. A seal having two seal portions B1 and B2 with which the body contacts, a third opening communicating with the third passage A between the seal portions B1 and B2, and a seal close to the second opening A pressure release opening communicating with the pressure release passage R 1 is provided between the portion B2 and the second opening. Characterized in that it is configured that.

According to another aspect of the present invention, there is provided a material feeding device, which includes a fixed clamp portion that selectively holds and releases a workpiece, and a fixed clamp portion that is reciprocally movable to selectively move the workpiece. A movable clamp part that clamps and opens, a supply part that supplies a pressure fluid that drives the fixed clamp part and the movable clamp part, and a pressure fluid from the supply part is constantly supplied to one end of the movable clamp part. A drive cylinder equipped with a piston for moving the part, a control part for supplying or shutting off the pressure fluid supplied from the supply part to the fixed clamp part and the movable clamp part, and a bush inside the valve body. A reciprocally movable valve element is housed, a first passage P for constantly supplying a pressure fluid from the supply section is connected to one end of the valve body, and the other end of the valve body is connected to the first passage P. Control A second passage P1 for supplying pressure fluid from a portion is connected, and the pressure fluid supplied from the first passage P when the pressure fluid from the second passage P1 is cut off from the valve body In the material feeding device, a third passage A leading to the other end of the drive cylinder is connected, and the valve body has an operation valve having a pressure release passage R for releasing the pressure of the pressure fluid. When pressure fluid is supplied from the control means to the other end of the valve body of the valve via the second passage, the third passage A of the actuating valve and the pressure release passage R communicate with each other via the opening of the bush. And the piston of the drive cylinder is configured to move from one end to the other end, and the other end of the valve body of the actuating valve is provided to the other end via the second passage. When the pressure fluid is supplied from the means, the opening of the bush is opened. Then, the third passage A of the actuating valve and the first passage P communicate with each other to actuate the second valve element configured to move the piston of the drive cylinder from the other end to the one end. The bush has first and second openings at axial ends communicating with the first and second passages P, P1, respectively, so that the bush can be selectively mounted in the bush of the valve. Two seal parts B1 and B2 with which the valve body comes into contact are provided at two positions on the inner peripheral surface having different directional positions, and communicated with the third passage A between the seal parts B1 and B2. And a pressure release opening communicating with the pressure release passage R between the second opening and the seal portion B2 near the second opening. .

According to a third aspect of the present invention, there is provided a material feeding device, which includes a fixed clamp part for selectively sandwiching and opening a work material, and a reciprocating movement with respect to the fixed clamp part to selectively select the work material. A movable clamp part that clamps and opens, a supply part that supplies a pressure fluid that drives the fixed clamp part and the movable clamp part, and a pressure fluid from the supply part is constantly supplied to one end of the movable clamp part. A drive cylinder equipped with a piston for moving the part, a control part for supplying or shutting off the pressure fluid supplied from the supply part to the fixed clamp part and the movable clamp part, and a bush inside the valve body. A reciprocally movable valve element is housed, a first passage P for constantly supplying a pressure fluid from the supply section is connected to one end of the valve body, and the other end of the valve body is connected to the first passage P. Control A second passage P1 for supplying pressure fluid from a portion is connected, and the pressure fluid supplied from the first passage P when the pressure fluid from the second passage P1 is cut off from the valve body In the material feeding device, a third passage A leading to the other end of the drive cylinder is connected, and the valve body has an operation valve having a pressure release passage R for releasing the pressure of the pressure fluid. Has first and second openings communicating with the first and second passages P and P1, respectively, at both ends in the axial direction, and has two positions on the inner peripheral surface having different axial positions. Has two seal portions B1 and B2 in contact with the valve body, has a third opening communicating with the third passage A between the seal portions B1 and B2, and has a second opening. Between the seal portion B2 near the opening and the second opening, the pressure communicating with the pressure release passage R 1 When the valve body supplies pressure fluid from the control means to the other end of the valve body of the actuating valve via the second passage, the valve body has an outlet opening. The third passage A of the actuation valve and the pressure release passage R communicate with each other so that the piston of the drive cylinder moves from one end to the other end.

According to a fourth aspect of the present invention, there is provided a material feeding device, which includes a fixed clamp part for selectively sandwiching and opening a work material, and a reciprocating movement with respect to the fixed clamp part for selectively working the work material. A movable clamp part that clamps and opens, a supply part that supplies a pressure fluid that drives the fixed clamp part and the movable clamp part, and a pressure fluid from the supply part is constantly supplied to one end of the movable clamp part. A drive cylinder equipped with a piston for moving the part, a control part for supplying or shutting off the pressure fluid supplied from the supply part to the fixed clamp part and the movable clamp part, and a bush inside the valve body. A reciprocally movable valve element is housed, a first passage P for constantly supplying a pressure fluid from the supply section is connected to one end of the valve body, and the other end of the valve body is connected to the first passage P. Control A second passage P1 for supplying pressure fluid from a portion is connected, and the pressure fluid supplied from the first passage P when the pressure fluid from the second passage P1 is cut off from the valve body In the material feeding device, a third passage A leading to the other end of the drive cylinder is connected, and the valve body has an operation valve having a pressure release passage R for releasing the pressure of the pressure fluid. Has first and second openings communicating with the first and second passages P and P1, respectively, at both ends in the axial direction, and has two positions on the inner peripheral surface having different axial positions. Has two seal portions B1 and B2 in contact with the valve body, has a third opening communicating with the third passage A between the seal portions B1 and B2, and has a second opening. Between the seal portion B2 near the opening and the second opening, the pressure communicating with the pressure release passage R 1 When the operating valve supplies pressure fluid from the control means to the other end of the valve body of the operating valve via the second passage, the operating valve passes through the opening of the bush. The third passage A of the actuating valve and the first passage P communicate with each other so that the piston of the drive cylinder moves from the other end to the one end.

[0022]

In the case where the first valve body prepared for push-feeding is provided in the bush of the actuating valve, when the control unit supplies the pressure fluid to the other end of the actuating valve, the valve is The body seals the seal portion B1 to close the first opening communicating with the first passage P and closes the second opening communicating with the second passage P1. In the actuation valve, the third passage A communicates with the pressure release passage R, and the other end of the drive cylinder is opened to the outside, so that the piston of the drive cylinder moves to the other end. At this time, the fixed clamp part supplied with the pressure fluid from the control part opens the work material, and the moving clamp part clamps the work material. Therefore, the moving clamp holds the material to be processed and pushes it.

When the pressure fluid from the control unit is shut off, the valve body of the operating valve moves to the other end side. The valve body seals the seal portion B2, the first passage P and the third passage A communicate with each other, and these passages, the pressure release passage R, and the second passage P1 are sealed. The pressure fluid supplied to the actuation valve via the first passage is supplied to the other end of the drive cylinder via the third passage A. The piston of the drive cylinder moves to the one end side. At this time, the fixed clamp part holds the work material, and the moving clamp part opens the work material. Therefore, the moving clamp releases the workpiece and returns to the original position.

In the case where the second valve body prepared for pulling feed is provided in the bush of the operating valve, when the pressure fluid is supplied from the control unit to the other end of the operating valve, the valve is The body seals the seal portion B2, connects the first passage P and the third passage A, and seals these passages, the pressure release passage R, and the second passage P1. The pressure fluid supplied to the actuation valve via the first passage P is supplied to the other end of the drive cylinder via the third passage A. The piston of the drive cylinder moves to the one end side. At this time, the fixed clamp portion supplied with the pressure fluid from the control portion releases the workpiece, and the moving clamp portion clamps the workpiece. Therefore, the movable clamp holds the workpiece and pulls it.

When the pressure fluid from the control unit is shut off, the valve body of the actuating valve moves to the other end side. The valve body seals the seal portion B1 to close the first opening communicating with the first passage P and closes the second opening communicating with the second passage P1. In the actuation valve, the third passage A and the pressure release passage R communicate with each other, and the other end of the drive cylinder is opened to the outside, so that the piston of the drive cylinder moves to the other end. At this time, the fixed clamp part holds the work material, and the movable clamp part opens the work material. Therefore, the moving clamp releases the workpiece and returns to its original position.

[0026]

【Example】

 In one embodiment described below, in the feeder having the above-mentioned basic structure, the bush provided in the valve body of the actuating valve has a special structure. The bush 50 of this embodiment can be commonly used for both push-feeding and pulling. That is, in the present embodiment, it is not necessary to replace the bush, and a push-feeding valve element and a pulling-feeding valve element are prepared in advance, and by simply replacing them, one feeding device can be obtained. It can be used by switching between push feed and pull feed. In the following description, for the parts other than the bush and the valve body, which have the same configuration as the conventional one, the reference numerals in the description of the conventional example are referred to when necessary, for the sake of simplifying the description. Is omitted.

A first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1A is a sectional view of an actuating valve 60 of the feeding device of the present embodiment, in which a first valve body 61 for pushing and feeding is attached.

The valve body 65 of the actuating valve 60 is formed by drilling inside the body of the feeding device, and therefore has a substantially cylindrical internal space for moving the valve body 61. A plurality of passages, which are a part of an air circuit for guiding air as pressure fluid, are connected to the internal space.

First, a first passage P to which compressed air is constantly supplied from a supply unit is connected and communicated with one end 65 a of the valve body 65. A second passage P1 to which compressed air is selectively supplied from the control valve 30 is connected and communicated with the other end portion 65b of the valve body 65.

Further, on the inner peripheral surface of the internal space of the valve body 65, the third passage A and the pressure release passage R are connected and communicated with each other at two different positions in the direction of the central axis of the internal space. The third passage A is a passage that connects the inside of the valve body 65 of the operation valve 60 and the other end 9b of the drive cylinder 9. Here, the other end 9b of the drive cylinder 9 refers to the bottom side of the barrel of the drive cylinder 9, and the head side where the rod 12 connected to the piston 11 that reciprocates in the barrel projects outside the barrel is one end. 9a. The pressure release passage R is a passage for opening the inside of the valve body 65 to the atmospheric pressure.

A bush 50 is attached to the internal space of the valve body 65. The bush 50 has a substantially cylindrical shape, and has a plurality of openings connected to the passages communicating with the valve body 65. First, a first opening p communicating with the first passage P is provided on the one end portion 60a side of the actuation valve 60. A second opening p1 communicating with the second passage P1 is formed on the other end 60b side of the actuation valve 60. The inner diameter of the second opening p1 is larger than the inner diameter of the inner peripheral surface of the other portion of the bush 50, and a step portion 63 is formed between the two. A part of the valve body 61 is engaged with the stepped portion 63 as described later.

On the inner peripheral surface of the bush 50, two seal parts B1 and B2 are formed at two different positions with respect to the direction of the central axis at regular intervals. Both seal parts B1 and B2 are circumferential ridges.

A third opening a 1 communicating with the third passage A is formed between the seal portions B1 and B2. Further, a pressure release opening r communicating with the pressure release passage R is formed between the seal portion B2 and the stepped portion 63.

The first valve body 61 mounted on the bush 50 has a structure in which a small diameter portion 70 and a large diameter portion 71 are coaxially connected via a rod body 72. The small diameter portion 70 has two sealing members 73, and the large diameter portion 71 has one sealing member 73. A spring 74 is interposed between the large diameter portion 71 and the second opening p1. When the large diameter portion 71 is locked to the stepped portion 63, the small diameter portion 70 contacts the seal portion B1 and closes the first opening p. At this time, the third opening a and the pressure release opening r are in communication with each other. In the state where the spring 74 is compressed and the valve body 61 moves to the second opening p1, the small diameter portion 70 is in contact with the seal portion B2, and the first opening p and the third opening a communicate with each other. The pressure release openings r are blocked from these openings.

When the first valve body 61 is mounted on the bush 50, an operating valve 60 having an air circuit diagram as shown in FIG. 2A is obtained. The feeding device equipped with this actuating valve 60 is a pushing type feeding device. Since the construction of the air circuit other than the actuating valve 60 in the present feeder is the same as the conventional one, refer to FIGS. 4 (a) and 4 (b) for those parts, and refer to FIG. The operation of the push-feed type feeding device in this embodiment will be described with reference to FIG.

Air is supplied from the supply unit to the air circuit system. Air is supplied to both ends of the actuating valve 60, but since the air is supplied to the other end 60b side via the control valve 30, the time is delayed compared to the supply to the one end 60a side. Therefore, without the spring 74, the valve body 61 moves to the other end 60b side where the pressure rise is delayed. Then, the small diameter portion 70 seals the seal portion B2, and the first passage P and the third passage A communicate with each other. Therefore, air is supplied to the other end portion 9b of the drive cylinder 9 through the third passage A, and as a result, the piston of the drive cylinder 9 moves to the one end portion 9a side.

However, in the present embodiment, the spring 74 is provided between the valve body 61 and the other end portion 60b side of the actuating valve 60, and resistance is given when the valve body 61 moves to the other end portion 60b side. . Therefore, when air is applied to both ends of the actuating valve 60, even if the pressure on the one end 60a side rises first, the valve body 61 does not suddenly move to the other end 60b side, but the other end 60b. The time difference until the air is supplied to the side can be gained. Therefore, there is no fear that the drive cylinder 9 operates unnecessarily.

When air is supplied from the control valve 30 to the other end portion 60b of the operation valve 60, the large diameter portion 71 of the valve body 61 is locked to the step portion 63, and the small diameter portion 70 seals the seal portion B1. To do. The first opening p communicating with the first passage P and the second opening p1 communicating with the second passage P1 are closed. The third passage A and the pressure release passage R communicate with each other through the third opening a and the pressure release opening r.

The other end 9 b side of the drive cylinder 9 is opened to the atmospheric pressure via the third passage A, the operation valve 60, and the pressure release passage R. Since air is constantly supplied to one end of the drive cylinder 9, the piston 11 of the drive cylinder 9 moves to the other end 9b side. At this time, the fixed clamp portion 3 supplied with air from the control valve 30 opens the workpiece, and the moving clamp portion 8 holds the workpiece. Therefore, the moving clamp part 8 clamps the material to be processed and pushes it.

When the air from the control valve 30 is shut off, the valve body 61 of the actuating valve 60 causes the spring 74 to retract and moves to the other end 60b side. The valve body 61 seals the seal portion B2, the first passage P and the third passage A communicate with each other, and these passages are sealed with the pressure release passage R and the second passage P1. The air supplied to the actuating valve 60 via the first passage P is supplied to the other end 9b of the drive cylinder 9 via the third passage A. The piston 11 of the drive cylinder 9 moves to the one end 9a side. At this time, the fixed clamp part 3 holds the work material, and the movable clamp part 8 releases the work material. Therefore, the moving clamp section 8 releases the workpiece and returns to its original position.

FIG. 1B is a cross-sectional view of the actuating valve 60 of the feeding device of the present embodiment, in which the second valve body 62 for pulling feeding is mounted. The second valve body 62 mounted on the bush 50 has a large diameter portion 75, a first small diameter portion 76 coaxially connected to the large diameter portion 75, and a first small diameter portion via a rod body 77. And a second small diameter portion 78 connected to the portion 76. Each of the small diameter portions 76 and 78 and the large diameter portion 75 is provided with one sealing member 73. In the state where the large diameter portion 75 is locked to the stepped portion 63, the first small diameter portion 76 is in contact with the seal portion B2 and the second small diameter portion 78 is not in contact with the bush 50. At this time, the first opening p and the third opening a communicate with each other, and these openings and the pressure release opening r are sealed at the seal portion B2 and the first small diameter portion 76. In the state where the valve element 62 has moved to the second opening p1, the second small diameter portion 78 is in contact with the seal portion B1 and the first small diameter portion 76 is separated from the seal portion B2. At this time, the first opening p and the second opening p1 are closed, the third opening a and the pressure release opening r communicate with each other, and the third passage A and the pressure release passage R communicate with each other.

When the second valve body 62 is attached to the bush 50, an operating valve 60 having an air circuit diagram as shown in FIG. 2B is obtained. The feeding device provided with this actuating valve 60 is a pulling type feeding device. Since the structure of the air circuit other than the actuating valve 60 in the present feeder is the same as the conventional one, refer to FIGS. 5 (a) and 5 (b) for those parts, and FIG. The operation of the push-feed type feeding device in this embodiment will be described with reference to FIG.

When the second valve body 62 prepared for pulling feed is provided in the bush 50 of the operating valve 60, air is supplied from the control valve 30 to the other side of the operating valve 60 via the second passage P1. In the state of being supplied to the end portion 60b, the large diameter portion 75 of the valve body 62 is locked to the step portion 63, and the first small diameter portion 76 seals the seal portion B2. The first passage P and the third passage A communicate with each other, and these passages are sealed from the pressure release passage R and the second passage P1. The air supplied to the actuating valve 60 via the first passage P is supplied to the other end 9b of the drive cylinder 9 via the third passage A. The piston 11 of the drive cylinder 9 moves to the one end 9a side. At this time, the fixed clamp part 3 supplied with air from the control valve 30 opens the work material, and the moving clamp part 8 holds the work material. Therefore, the moving clamp part 8 holds the workpiece and pulls it.

When the air from the control valve 30 is shut off, the valve element 62 of the actuating valve 60 moves to the other end 60b side. The second small diameter portion 78 of the valve element 62 seals the seal portion B1. The first opening p communicating with the first passage P is closed. In the actuation valve 60, the third passage A communicates with the pressure release passage R, and the other end 9b side of the drive cylinder 9 is opened to the atmospheric pressure, so that the piston of the drive cylinder 9 moves to the other end 9b side. . At this time, the fixed clamp part 3 holds the work material, and the movable clamp part 8 releases the work material. Therefore, the moving clamp portion 8 releases the workpiece and returns to its original position.

In the embodiments described above, the valve main body of the operating valve and the main body of the feeding device are integrated. That is, the valve body of the actuating valve was formed inside the body of the feeding device by drilling. However, the main body of the feeding device and the valve main body of the operating valve may be separately configured, and the main body of the operating valve, which is a separate component, may be provided inside the main body of the feeding device.

[0046]

[Effect of device]

 The material feeding device according to the present invention is a feed device that feeds material by driving the moving clamp part and the fixed clamp part by operating the pressure fluid using the control valve and the actuation valve. With a special structure of the bush provided in the, the feed device can be arbitrarily changed between the push-feed type and the pull-type by simply replacing the valve body provided in the operating valve. Therefore, if one feeding device is installed, both feeding directions can be realized simply by exchanging the valve element as needed, and there is versatility that is convenient for the user. This has the effect of significantly improving the above convenience and functionality.

[Brief description of drawings]

FIG. 1A is a cross-sectional view of a working valve according to an embodiment of a push-feed type, and FIG. 1B is a cross-sectional view of a working valve according to an embodiment of a pull-feed type.

FIG. 2A is an air circuit diagram of a push-feed type operating valve, and FIG. 2B is an air circuit diagram of a pull-feed type operating valve.

3A is a plan view of a conventional feeding device, and FIG. 3B is a side view of the same.

FIG. 4A is an air circuit diagram showing a state in which an operation signal is not input in the air circuit diagram of the conventional push-feed type feeding device, and FIG. 4B is an air circuit diagram showing a state in which an operation signal is also input. It is a circuit diagram.

FIG. 5 (a) is an air circuit diagram showing a state in which an operation signal is not input in the air circuit diagram of a conventional pulling type feeder, and FIG. 5 (b) is an air circuit diagram showing a state in which an operation signal is also input. It is a figure.

FIG. 6A is a sectional view of an actuating valve in a conventional push-feed type feeding device, and FIG. 6B is an air circuit diagram thereof.

FIG. 7A is a sectional view of an actuating valve in a conventional tension type feeding device, and FIG. 7B is an air circuit diagram thereof.

[Explanation of symbols]

 3 Fixed Clamp Section 8 Moving Clamp Section 9 Drive Cylinder 10 Material as Work Material 11 Piston 30 Control Valve as Control Section 50 Bushing 60 Actuating Valve 61 First Valve Body for Pushing Feed 62 Second for Pulling Feed Valve body 65 Valve body P First passage P1 Second passage A Third passage R Pressure release passage p First opening p1 Second opening a Third opening r Pressure release opening

Claims (4)

[Scope of utility model registration request] 1. A fixed clamp part that selectively clamps and releases a work material, a movable clamp part that reciprocates with respect to the fixed clamp part and selectively clamps and releases the work material, and the fixed member. A supply unit that supplies a pressure fluid for driving the clamp unit and the movable clamp unit; and a drive cylinder that includes a piston that moves the movable clamp unit while the pressure fluid from the supply unit is constantly supplied to one end thereof. A control unit for supplying or shutting off the pressure fluid supplied from the supply unit to the fixed clamp unit and the movable clamp unit; and a valve body housed inside a valve body so as to be reciprocally movable via a bush A first passage P for constantly supplying pressure fluid from the supply unit is connected to one end of the valve body, and a second passage P1 for supplying pressure fluid from the control unit to the other end of the valve body. Contact The valve body and the second
A third passage A that guides the pressure fluid supplied from the first passage P to the other end of the drive cylinder when the pressure fluid from the passage P1 is blocked is connected to the valve body. And a working valve in which a pressure release passage R for releasing the pressure is formed, the bush has first and second openings communicating with the first and second passages P, P1, respectively. It has two seal parts B1 and B2 which are provided at both ends in the axial direction and contact the valve body at two positions on the inner peripheral surface having different axial positions, and between the seal parts B1 and B2. Has a third opening communicating with the third passage A and has a seal portion B2 close to the second opening.
A material feeding device having a pressure release opening communicating between the pressure release passage R and the second release opening. 2. A fixed clamp part for selectively sandwiching and releasing a workpiece, a movable clamp part for reciprocating with respect to the fixed clamp part for selectively sandwiching and releasing the workpiece, and the fixing. A supply unit that supplies a pressure fluid for driving the clamp unit and the movable clamp unit; and a drive cylinder that includes a piston that moves the movable clamp unit while the pressure fluid from the supply unit is constantly supplied to one end thereof. A control unit for supplying or shutting off the pressure fluid supplied from the supply unit to the fixed clamp unit and the movable clamp unit; and a valve body housed inside a valve body so as to be reciprocally movable via a bush A first passage P for constantly supplying pressure fluid from the supply unit is connected to one end of the valve body, and a second passage P1 for supplying pressure fluid from the control unit to the other end of the valve body. Contact The valve body and the second
A third passage A that guides the pressure fluid supplied from the first passage P to the other end of the drive cylinder when the pressure fluid from the passage P1 is blocked is connected to the valve body. And a working valve in which a pressure release passage R for releasing the pressure is formed, the pressure fluid is supplied from the control means to the other end of the valve body of the working valve via the second passage. When the valve is opened, the third passage A and the pressure release passage R of the operating valve are opened through the opening of the bush.
Through a second valve passage, the first valve body configured to move the piston of the drive cylinder from one end to the other end, and the other end of the valve body of the actuating valve via the second passage. When pressure fluid is supplied from the control means, the third passage A of the actuating valve and the first passage P communicate with each other through the opening of the bush so that the piston of the drive cylinder moves from the other end to one end. A first valve that communicates with the first and second passages P, P1 so that the second valve element configured to move can be selectively mounted in the bush of the operating valve. And two seal portions B1 and B2 that have the second opening at both ends in the axial direction and the valve body comes into contact with at two positions on the inner peripheral surface having different axial positions. A third opening communicating with the third passage A is provided between the portions B1 and B2, and the second opening has a third opening. Close to the mouth seal portion B2
A material feeding device having a pressure release opening communicating between the pressure release passage R and the second release opening. 3. A fixed clamp part that selectively clamps and releases a workpiece, a movable clamp part that reciprocates with respect to the fixed clamp part and selectively clamps and releases a workpiece, and the fixed member. A supply unit that supplies a pressure fluid for driving the clamp unit and the movable clamp unit; and a drive cylinder that includes a piston that moves the movable clamp unit while the pressure fluid from the supply unit is constantly supplied to one end thereof. A control unit for supplying or shutting off the pressure fluid supplied from the supply unit to the fixed clamp unit and the movable clamp unit; and a valve body housed inside a valve body so as to be reciprocally movable via a bush A first passage P for constantly supplying pressure fluid from the supply unit is connected to one end of the valve body, and a second passage P1 for supplying pressure fluid from the control unit to the other end of the valve body. Contact The valve body and the second
A third passage A that guides the pressure fluid supplied from the first passage P to the other end of the drive cylinder when the pressure fluid from the passage P1 is blocked is connected to the valve body. And a working valve in which a pressure release passage R for releasing the pressure is formed, the bush has first and second openings communicating with the first and second passages P, P1, respectively. It has two seal parts B1 and B2 which are provided at both ends in the axial direction and contact the valve body at two positions on the inner peripheral surface having different axial positions, and between the seal parts B1 and B2. Has a third opening communicating with the third passage A and has a seal portion B2 close to the second opening.
And a second opening, a pressure release opening communicating with the pressure release passage R is provided, and the valve body is provided at the other end of the valve body of the actuation valve via the second passage. When the pressure fluid is supplied from the control means, the third passage A of the operation valve and the pressure release passage R communicate with each other through the opening of the bush, and the piston of the drive cylinder moves from one end to the other end. A material feeding device characterized by being configured as follows. 4. A fixed clamp part for selectively sandwiching and releasing a workpiece, a movable clamp part for reciprocating with respect to the fixed clamp part for selectively sandwiching and releasing a workpiece, and the fixing. A supply unit that supplies a pressure fluid for driving the clamp unit and the movable clamp unit; and a drive cylinder that includes a piston that moves the movable clamp unit while the pressure fluid from the supply unit is constantly supplied to one end thereof. A control unit for supplying or shutting off the pressure fluid supplied from the supply unit to the fixed clamp unit and the movable clamp unit; and a valve body housed inside a valve body so as to be reciprocally movable via a bush A first passage P for constantly supplying pressure fluid from the supply unit is connected to one end of the valve body, and a second passage P1 for supplying pressure fluid from the control unit to the other end of the valve body. Contact The valve body and the second
A third passage A that guides the pressure fluid supplied from the first passage P to the other end of the drive cylinder when the pressure fluid from the passage P1 is blocked is connected to the valve body. And a working valve in which a pressure release passage R for releasing the pressure is formed, the bush has first and second openings communicating with the first and second passages P, P1, respectively. It has two seal parts B1 and B2 which are provided at both ends in the axial direction and contact the valve body at two positions on the inner peripheral surface having different axial positions, and between the seal parts B1 and B2. Has a third opening communicating with the third passage A and has a seal portion B2 close to the second opening.
And a second opening, a pressure release opening communicating with the pressure release passage R is provided, and the operation valve has the second end at the other end of the valve body of the operation valve.
When the pressure fluid is supplied from the control means through the passage, the third passage A of the actuating valve and the first passage P communicate with each other through the opening of the bush so that the piston of the drive cylinder has the other end. A material feeding device configured to move from one part to one end.