JPH0626971B2 - Intermittent drive type conveyor - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermittent drive type conveyor in which a belt is wound around two rollers supported at both ends of a support frame and the belt is intermittently fed.

(Prior Art) In a conventional intermittent drive type conveyor, a belt wound around rollers is generally driven by a motor.

However, in such a conventional conveyor,
Since the motor is attached to the conveyor as a drive source, the entire conveyor becomes heavy and thick, and in one step of the press machine etc. In order to synchronize the motor with the motor, a complicated control circuit for controlling the motor is required, and there is a problem that the manufacturing cost increases.

(Problems to be Solved by the Invention) The present invention has been made by paying attention to such conventional problems, and does not require a motor as a drive source of a belt, and intermittent feeding operation of a machine and a belt. It is an object of the present invention to provide an intermittent drive type conveyor which can be synchronized with each other very easily.

(Means for Solving the Problems) The gist of the present invention for achieving such an object is to provide an intermittent drive system in which a belt is wound around two rollers supported at both ends of a support frame and the belt is intermittently fed. In the conveyor, the support frame is formed by installing the two rollers between both ends of a pair of parallel elongated support frames, and supports the cylinder so that a piston rod reciprocates along the moving direction of the belt. A sprocket wheel integrally attached to one of the two rollers and a support member integrated with the support frame, the movement member being attached to the frame, reciprocally movable in the moving direction of the belt, connected to the piston rod. A chain is wound around a sprocket wheel rotatably supported by a member, and the chain is attached to the moving member when the moving member moves in one direction. Is provided with a claw member that meshes with a part of the cylinder to move the chain and that escapes from the chain when the moving member moves in the other direction. The cylinder, the sprocket wheel, the chain, the claw member, and other constituent members. Between the pair of support frames and in a space surrounded by the belt, and further, a drive control mechanism for controlling reciprocating movement of the piston rod is a fluid element using only a fluid pressure as a drive source. The drive control mechanism is configured to be housed in the space, and the drive control mechanism includes a first cam valve that detects a retracted position of the moving member, a second cam valve that detects an advanced position of the moving member, the cylinder, and an external fluid. An operating valve that is interposed between a pressure source and supplies fluid pressure to the cylinder such that the moving direction of the piston rod is switched according to the fluid pressure output from each cam valve; The intermittent drive type conveyor is characterized in that the operating portion is projected to the outside and the start valve is capable of controlling the fluid pressure so as to suppress the operation of the actuating valve.

(Operation) Then, in the intermittent drive type conveyor, when the starter is operated in a state where the first sensor detects that the piston rod is at the retracted position, the piston rod projects from the retracted position, The second sensor detects that the moving member has moved to one moving end together with the piston rod, and the switching portion is switched by the output from the second sensor at this time, so that the piston rod has the protruding position. To return from. Then, when the moving member moves in one direction by the protrusion of the piston rod, the claw member meshes with a part of the chain to move the chain,
As a result, the belt is fed by a certain amount in one direction, and when the moving member moves in the other direction due to the return from the projecting position of the piston rod, the pawl member escapes from the chain, and the pawl member leaves the chain. Return.

Since the components including the control mechanism are housed in the space surrounded by the belt, and the overall shape is flat without protrusion, a highly flexible transfer system is constructed. Does not take up storage space when not in use.

Since fluid pressure is used as a power source for operation and the control mechanism is a fluid element that operates only with fluid, it is effective for a subject that is easily burned.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 to 6 show an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of FIG. 1 with a part thereof cut away.

As shown in FIG. 1 and FIG. 2, the intermittent drive type conveyor 1 for intermittently feeding a belt winds a belt 30 around two rollers 21 and 22 supported at both ends of a support frame 10 and a piston rod 41. The cylinder 40 is attached to the support frame 10 so that the cylinder reciprocates along the moving direction of the belt 30, and the movable member 50 that can reciprocate along the moving direction of the belt 30 is connected to the piston rod 41 via the connecting member 49. , A sprocket wheel 61 integrally provided with the roller 21, and a sprocket wheel 6 rotatably supported by a support member 2 integral with the support frame 10.
A chain 63 is wound around 2 and the moving member 50 is meshed with a part of the chain 63 when the moving member 50 moves in one direction (when the belt moves in the feeding direction). A claw member 70 is provided which is moved and moves away from the chain 63 when the moving member 50 moves in the other direction (returning operation in the direction opposite to the feed).

As shown in FIGS. 1 and 2, the support frame 1
Reference numeral 0 denotes a pair of support frames 11 and 12 which have a U-shaped cross section and are arranged in parallel to each other, and a pivotally supporting portion 13 which is fixed to the left ends of the support frames 11 and 12 and pivotally supports the roller 21,
14 and the adjustment bolts 81, at the right end of the support frames 11, 12.
It is composed of pivot portions 15 and 16 which are connected to each other via 82 so that the distance between them can be adjusted and which pivotally supports the roller 22. By rotating the nuts 81a and 82a of the adjustment bolts 81 and 82, the space between the pivotal support portion 15 and the support frame 11 and the pivotal support portion 16 are rotated.
The tension of the belt 30 can be adjusted by adjusting the distance between the support frame 12 and the support frame 12.

The rotary shaft 21a integrated with the roller 21 is provided with the support frames 13, 1
4 is rotatably supported, while the rotary shaft 22a integral with the roller 22 is rotatably supported by the support frames 15 and 16.

As shown in FIGS. 1 to 4, a thin plate 83 for preventing the slack of the belt 30 is fixed inside the upper ends of the support frames 11 and 12, and the upper surface of the thin plate 83 is attached to the belt 30. Are made to pass.

Further, three stays 84, 85 and 86 for preventing the slack of the belt 30 are fixed to the lower ends of the support frames 11 and 12, respectively.
The belt 30 passes over the upper surface of the.

As shown in FIGS. 1 and 2, one end 40a of the cylinder 40 is a support member 42 fixed to the support frames 11 and 12, and the other end 40b is a support member fixed to the support frames 11 and 12. It is fixed to 43 respectively.

As shown in FIGS. 1 and 2, the support member 2 is
A support plate 2a and 2b fixed to a fixed plate 87 fixed to the support frames 11 and 12, and a shaft portion 62a integral with the sprocket wheel 62 is rotatably supported on the support plates 2a and 2b. ing.

As shown in FIGS. 1 to 5, the moving member 50 is
It is composed of two moving plates 51, 52,
One end of the bolt is fixed to the connecting member 49, and the other end is bolt 5
It is connected by 3.

The bases 51a and 52a of the moving plates 51 and 52 are fixed plates 8
It is slidably guided by the guide members 53 and 54 fixed to the No. 7. The central portions of the vertical wall portions 51b and 52b bent from the respective base portions 51a and 52a have cutout portions 51c so as not to interfere with the sprocket wheel 62 or the like when reciprocating in conjunction with the piston rod 41. 52c is formed.

As shown in FIGS. 1, 3, and 5, the pawl member 70 has a shaft 71 rotatably supported by the vertical walls 51b and 52b, and a shaft 71 fixed to the shaft 71. It is composed of a ratchet member 72 and a spring member 73.

The ratchet member 72 is formed in a wheel shape, and a plurality of locking claws 72a that mesh with the chain 63 are formed on a part of the outer periphery of the ratchet member 72. A locking pin 74 that abuts the cut surface 72b of the ratchet member 72 and locks the cut surface 72b is provided on the vertical wall portion 51b so as to project therefrom. A spring member 73 is hooked on a spring hooking pin 75 and a locking pin 74 that project from the ratchet member 72, and the cutting surface 72b of the ratchet member 72 is brought into contact with the locking pin 74 by the spring member 73. Is urged by.

As shown in FIG. 3 and FIG. 5, the base parts 51a, 5
An auxiliary plate 8 is provided on the lower end surface of 2a to prevent the chain 63 from slackening and coming off the sprocket wheel 62.
8 is fixed. The central portion 88a of the auxiliary plate 88 is recessed from the left and right ends thereof, and a slight gap 88b is provided between the central portion 88a and the chain 63.

As described above, the cylinder 40, the sprocket wheel 6
The components such as 1, 62, the chain 63, and the claw member 70 are housed in the space surrounded by the belt 30 between the pair of support frames 11 and 12.

The cylinder 40 is a single-acting air cylinder having a built-in spring member 40c for returning the piston rod 41 from the protruding position. An air-driven drive control mechanism for controlling the reciprocating movement of the piston rod 41 by controlling the supply of air to the cylinder 40 will be described with reference to FIGS. 1 and 6. FIG. 6 shows a circuit diagram of the drive control mechanism.

The drive control mechanism is composed of a fluid element that uses only fluid pressure as a drive source, and is housed in the space surrounded by the belt.

As shown in FIG. 1 and FIG. 6, the air drive type drive control mechanism detects the first cam valve 101 as the first sensor for detecting the retracted position of the moving member 50 and the forward position of the moving member 50. Second cam valve 1 as second sensor
02, an air actuated valve 103 as a switching unit for switching the moving direction of the piston rod 41 by outputs from the first and second cam valves 101, 102, and a start valve 104 as a starting unit.

The start valve 104 includes a port 104a connected to the tube T1 and a port 104 connected to the tube T2.
b and two ports 104a,
The first position (the position shown in the figure) in which 104b becomes the non-communication state
And the ports 104a and 104b are in communication with each other
It is a 2-port 2-position switching valve that can be switched to and from the position.

The start valve 104 is provided with an operating portion 104c. When the operating portion 104c is pushed from the position shown in the drawing, the start valve 104 is switched from the first position to the second position in the drawing and the operating portion 104c is released. And the start valve 1
04 is automatically returned from the second position to the first position.

The tube T1 is connected to the tube T4 via a connecting tool C1, a tube T3 and a connecting tool C2. The tube T4 is supported by the support frame 14 and connected to the air source 105.

The first cam valve 101 includes a port 101a connected to the tube T2 and a port 1 connected to the tube T5.
01b and two ports 101
It is a 2-port 2-position switching valve capable of switching between a first position (a position shown in the figure) in which a and 101b are in a communicating state and a second position in which both ports 101a and 101b are in a non-communicating state. The first cam valve 101 is biased toward the second position by a spring member 101c.

In addition, the piston rod 41 is attached to the first cam valve 101.
Detection unit 1 capable of abutting on the side surface of the connecting member 49 connected to
01d is provided. The piston rod 41 is the first
In the retracted position shown in FIG. 6 and FIG. 6, the detection portion 101d abuts the side surface of the connecting member 49, whereby the first cam valve 101 is held at the first position against the biasing force of the spring member 101c, When the piston rod 41 projects from the retracted position, the detection unit 101d causes the connecting member 49 to move.
The first cam valve 101 is switched to the second position by the biasing force of the spring member 101c.

The air operated valve 103 includes a port 103a connected to the connector C1 via a tube T6, a port 103b connected to the cylinder 40 via a tube T7, a port 103c connected to a tube T5, and a tube T8.
Has four ports with port 103d connected to
In addition, the ports 103a and 103b are in a non-communication state with the first position (the position shown in the figure) and the ports 103a and 103b.
4 ports 2 that can be switched to the 2nd position where the
It is a position switching valve. When the air-operated valve 103 receives the supply of air from the tube T5 to the port 103c, the air-operated valve 103 switches from the first position to the second position shown in the drawing, and the tube T8
When the air is supplied from the port 103d to the port 103d, the second position is switched to the first position.

The second cam valve 102 has a port 102a connected to the tube T8 and a port 1 connected to the tube T9.
02b, and both ports 102
It is a 2-port 2-position switching valve capable of switching between a first position (a position shown in the figure) where a and 102b are in a non-communication state and a second position where both ports 102a and 102b are in a communication state. The second cam valve 102 is biased toward the first position by a spring member 102c.

The second cam valve 102 is provided with a detection portion 102d that can contact an inclined portion 52d formed at the tip of the moving plate 52. When the piston rod 41 is in the retracted position and the moving member 50 is in the original position shown in the figure,
The second cam valve 102 is held in the first position shown in the figure by the urging force of the spring member 102c, and the piston rod 41 projects from the retracted position, whereby the moving member 50 is displaced leftward from the original position shown in the figure. , Detection unit 102
The d contacts the inclined portion 52d, whereby the second cam valve 102 is switched to the second position against the biasing force of the spring member 102c. The tube T9 is connected to the connector C2.

The operation of the intermittent drive type conveyor 1 having the above configuration will be described below.

In the state shown in FIG. 6, the start valve 104 is in the first position, the ports 104a and 104b are in a non-communication state, and air is not supplied to the cylinder 40. It is in the retracted position as shown in.

When the operating portion 104c of the start valve 104 is pushed with a finger in this state, the start valve 104 is switched from the first position to the second position and the ports 104a and 104b communicate with each other, so that the air from the air source 105 is supplied to the tube T4. T3, T
1, sent to the first cam valve 101 through the start valve 104 and the tube T2. At this time, since the detecting portion 101d of the first cam valve 101 is in contact with the side surface of the connecting member 49, the first cam valve 101 is in the first position and the ports 101a and 101b are in communication. Therefore, the air from the tube T2 is supplied to the first cam valve 10
1 and the tube T5 to the port 103c of the air operated valve 103. This allows the air operated valve 10
3 is switched from the first position of FIG. 6 to the second position and the ports 103a and 103b communicate with each other.
And is sent to the cylinder 40 through the tube T7.

As a result, the spring member 40 built in the cylinder 40
The piston rod 41 projects leftward from the retracted position in FIG. 6 against c, and together with the piston rod 41, the connecting member 49 and the moving plates 51, 52 also guide members 53, 5.
It is slidably guided by 4 and moves leftward from the original position shown in FIGS. 1 and 3. When the detecting portion 101d of the first cam valve 101 is disengaged from the side surface of the connecting member 49 due to the leftward movement of the connecting member 49, the first cam valve 101
Is switched from the first position shown in the figure to the second position by the urging force of the spring member 101c, and the ports 101a and 101b are brought into a non-communication state.

When the movable plates 51, 52 are moved leftward from the positions shown in FIGS. 1 and 3, the engagement between the locking claw 72a of the ratchet member 72 and the chain 63 is maintained by the urging force of the spring member 73, Since the locking pin 74 pushes the cut surface 72b of the ratchet member 72, the ratchet member 7
The second locking claw 72a moves the chain 63 to the left in the drawing.

The leftward movement of the chain 63 causes the sprocket wheel 61 and the roller 21 to rotate in the clockwise direction, whereby the belt 30 is moved by a certain amount in the feeding direction.

In this way, at the position where the belt 30 is fed by a certain amount,
The moving plate 52 has moved to the left end position, and the detecting portion 102d of the second cam valve 102 causes the tilting portion 52d of the moving plate 52 to move.
Since the second cam valve 102 contacts the spring member 1,
The first position in the figure is switched to the second position against the urging force of 02c, and the ports 102b and 102a communicate with each other. As a result, the air from the air source 105 is transferred to the tubes T4, T
9, the second cam valve 102 and the tube T8 are sent to the port 103d of the air operated valve 103, the air operated valve 103 returns from the second position to the first position shown in the figure, and the ports 103a and 103b are in the non-communication state. Therefore, the supply of air to the cylinder 40 is cut off. Therefore, the piston rod 41 retracts from the projecting position by the urging force of the spring member 40c of the cylinder 40.

When the connecting member 49 and the moving plates 51, 52 are moved from the left end position to the right in the figure in conjunction with the retreat of the piston rod 41, they are pulled by the shaft portion 71 integral with the moving plates 51, 52 and the ratchet member. 72 also moves to the right in the figure. At this time, since the ratchet member 72 can rotate and escape in the direction in which the engagement between the locking claw 72a and the chain 63 is disengaged, the ratchet member 72 can escape.
3, the ratchet member 72, the moving plates 51, 52, etc. return to their original positions shown in FIGS. 1 and 3 while being stopped by their own load.

When the moving plates 51, 52 and the like move rightward from the left end position, the inclined portion 52d comes off the detecting portion 102d,
The second cam valve 102 returns from the second position to the first position shown in the figure by the biasing force of the spring member 102c, and the port 10
2b and 102a are in a non-communication state. And the moving plate 5
When 1, 52 and the like return to the original position shown in FIGS. 1 and 3, the detection portion 101d again contacts the side surface of the connecting member 49, so that the first cam valve 101 resists the biasing force of the spring member 101c. Switching from the second position to the first position in the figure,
The ports 101b and 10a are connected again. Therefore,
At this time, if the operating portion 104c is continuously pressed, air is supplied to the cylinder 40 and the piston rod 41 projects from the retracted position in the same manner as in the above case, but at this time, the operating portion 104c is pressed. If not, the start valve 104 is returned to the first position in the figure, and the ports 104a and 104b are in the non-communication state, so that air is not supplied to the cylinder 40.

In this way, the operating portion 104 of the start valve 104
While pressing c, the belt 30 is intermittently fed by a fixed amount, and thus the parts dropped on the belt 30 are intermittently fed by a fixed amount.

In the above embodiment, the spring member 4 is used as the cylinder 40.
Although a single-acting cylinder incorporating 0c is used, the present invention is not limited to this.

Further, it goes without saying that the drive control mechanism of the present invention may be configured by a hydraulic drive type drive control mechanism instead of the air drive type drive control mechanism as in the above embodiment.

(Effects of the Invention) According to the intermittent drive type conveyor of the present invention, when the moving member moves in one direction, the claw member meshes with a part of the chain to move the chain, which causes the belt to move in one direction. Direction, and when the moving member moves in the other direction,
Since the claw member escapes from the chain and the claw member returns by leaving the chain, the belt can be intermittently fed, and since it is not necessary to use a drive source such as a motor, the entire conveyor is light and In addition, the machine can be made thinner, and the intermittent feeding operation of the machine and the belt can be very easily synchronized, and the manufacturing cost can be reduced.

The components including the control mechanism are housed in the space surrounded by the belt, and the flat form as a whole makes it easy to arrange and has a high degree of freedom. Also, do not take up storage space when not in use. Since fluid pressure is used as the power source for operation and the control mechanism is a fluid element that operates only with fluid, it does not ignite and is safe even when used for an easily combustible object.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention.
The figure is an overall perspective view with a part broken away, FIG. 2 is a longitudinal sectional view of FIG. 1 with a part broken away, and FIG. 3 is an enlarged view of the left side part of FIG. Fig. 4 is an enlarged view of Fig.
-IV line sectional view, FIG. 5 is a VV line sectional view of FIG. 2, FIG.
The figure is a circuit diagram showing a drive control mechanism. 1 ... Intermittent drive type conveyor 10 ... Support frame 21,22 ... Roller 30 ... Belt, 40 ... Cylinder 41 ... Piston rod, 50 ... Moving member 61, 62 ... Sprocket wheel 63 ... Chain , 70 ... Claw member 101 ... First cam valve (first sensor) 102 ... Second cam valve (second sensor) 103 ... Air operated valve (switching section) 104 ... Start valve (starting section)

Front page continuation (72) Inventor Atsushi Sakurai 8 Satana, Fujisawa, Kanagawa Prefecture Isuzu Motors Ltd. Fujisawa Plant (72) Inventor Satoru Masuda 3-4 Takeyama, Midori-ku, Yokohama, Kanagawa Prefecture 2 3201 Takeyama housing complex −143 (72) Inventor Hiroyuki Ishigami 1-30-15 Koyamadai, Shinagawa-ku, Tokyo (56) Reference JP 62-96215 (JP, A) Yoshihiro Shiozaki and Kazuo Nakamura “Mechanical Circuit-Hydraulic Pressure / Pneumatics / Control- ”December 10, 1974, first edition, 3rd edition, Kyoritsu Publishing Co., Ltd., page 113, Figure 3, 31

Claims (1)

[Claims] 1. An intermittent drive type conveyor in which a belt is wound around two rollers supported at both ends of a support frame and the belt is intermittently fed, wherein the support frame is provided at both ends of a pair of elongated parallel support frames. The two rollers are installed between them, and a cylinder is attached to the support frame so that a piston rod reciprocates along the moving direction of the belt, and a reciprocating member that can reciprocate along the moving direction of the belt. And a chain around the sprocket wheel integrally provided with one of the two rollers and a sprocket wheel rotatably supported by a support member integrated with the support frame, When the moving member moves in one direction, the moving member meshes with a part of the chain to move the chain, and the moving member A claw member that escapes from the chain when moving in the other direction is provided, and the structural members such as the cylinder, sprocket wheel, chain, claw member, etc. are surrounded by the belt between the pair of support frames. And a drive control mechanism for controlling the reciprocating movement of the piston rod, the drive control mechanism being constituted by a fluid element having only a fluid pressure as a drive source and housed in the space. A first cam valve that detects the retracted position of the moving member, a second cam valve that detects the advanced position of the moving member, and a fluid pressure output from each cam valve that is interposed between the cylinder and an external fluid pressure source. The operating valve that supplies fluid pressure to the cylinder so that the moving direction of the piston rod is switched, and the operation part is projected to the outside to prevent the operation of the operating valve. Intermittent driving conveyor, characterized in that to constitute a pressure in the controllable start valve.