JPH0446850B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides two
This invention relates to an intermittent drive type conveyor in which a belt is wound around two rollers and the belt is intermittently fed.

(Prior Art) In conventional intermittent drive conveyors, a belt wound around a roller is generally driven by a motor.

However, in such conventional conveyors, since a motor is attached to the conveyor as a driving source, the entire conveyor becomes heavy, and if the motor is housed inside the conveyor, the thickness of the entire conveyor increases. Additionally, if you try to synchronize the machine and the motor so that the belt is fed intermittently by a fixed amount in one process such as a press machine, a complicated control circuit is required to control the motor, and manufacturing The problem was that the cost would be high.

(Problems to be Solved by the Invention) The present invention has been made by focusing on these conventional problems. The object of the present invention is to provide an intermittent drive conveyor that can be synchronized extremely easily.

(Means for Solving the Problems) The gist of the present invention for achieving the above object is as follows:
In 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, a cylinder is disposed in a gap between a tension side and a slack side of the belt, The cylinder is attached to the support frame so that the piston rod reciprocates along the moving direction of the belt, and a moving member capable of reciprocating along the moving direction of the belt is connected to the piston rod, and one of the two rollers is connected to the cylinder. A chain is wound around a sprocket wheel provided integrally with a sprocket wheel and a sprocket wheel rotatably supported by a support member integral with the support frame, and the chain is wound around a sprocket wheel that is rotatably supported by a support member integral with the support frame. When moving, it is restrained so that it cannot swing relative to the moving member, and is moved along the chain by engaging with a part of the chain, and when moving in the other direction of the moving member, it does not swing relative to the moving member. The intermittent conveyor is characterized in that it is provided with a pawl member that escapes from the chain.

(Function) In the intermittent drive type conveyor, when the movable member moves in one direction, the claw member engages with a part of the chain to move the chain, thereby causing the belt to move in one direction. sent in the direction of
When the movable member moves in the other direction, the pawl member escapes from the chain, whereby the pawl member returns leaving the chain behind.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

1 to 6 show an embodiment of the present invention, and FIG. 3 is a longitudinal sectional view of FIG. 2.

As shown in FIGS. 1 and 2, the intermittent drive type conveyor 1 that conveys the belt intermittently has two rollers 21 and 2 supported at both ends of a support frame 10.
2, a cylinder 40 is attached to the support frame 10 so that the piston rod 41 reciprocates along the moving direction of the belt 30, and a moving member 50 that can reciprocate along the moving direction of the belt 30 is installed. Connected to piston rod 41, roller 2
Sprocket wheel 6 provided integrally with 1
1 and a sprocket wheel 62 that is rotatably supported by the support member 2 that is integrated with the support frame 10. When the moving member 50 moves in the other direction (when the belt moves in the direction opposite to the feeding direction), it engages with a part of the chain 63 to move the chain 63, and when the moving member 50 moves in the other direction (when returning to the direction opposite to the feeding direction). is provided with a pawl member 70 that escapes from the chain 63.

As shown in FIGS. 1 and 2, the support frame 10 has a U-shaped cross section, and includes a pair of support frames 11 and 12 arranged parallel to each other, and a left side of the support frames 11 and 12. Pivot supports 13 and 14, which are fixed to each other and pivotally support the roller 21, and the support frame 1
The rollers 1 and 12 are connected to the right ends of the rollers 1 and 12 via adjustment bolts 81 and 82 so that the distance between them can be adjusted.

As shown in FIGS. 2 and 3, the rotating shaft 21a integrated with the roller 21 is rotatably supported by the support frames 13 and 14, while the roller 22
A rotating shaft 22a, which is integral with the rotary shaft 22a, is rotatably supported by the support frames 15 and 16.

As shown in Figures 1 to 3, each pivot point 1
Engagement parts 15a, 16 formed at the left ends of 5, 16
a is slidably fitted into the engagement holes of the support frames 11 and 12. The adjusting bolts 81, 82 are attached to the left ends of the engaging portions 15a, 16a, and the nuts 81a, 82 of the adjusting bolts 81, 82
Operation holes 15b and 16b are provided for inserting a wrench or the like for turning 2a from the outside. By inserting a wrench or the like into the operation holes 15b, 16b and rotating the nuts 81a, 82a of the adjustment bolts 81, 82 with the wrench, the distance between the pivot portion 15 and the support frame 11 can be adjusted. The belt 30 is adjusted by adjusting the distance between the branch 16 and the support frame 12.
The tension can be adjusted.

As shown in FIGS. 1 to 5, the support frame 11,
A thin plate 83 for preventing the belt 30 from sagging is fixed to the inner side of each upper end of the belt 12, and the belt 30 is configured to pass over the upper surface of the thin plate 83.

Additionally, three stays 8 are provided at the lower ends of the support frames 11 and 12 to prevent the belt 30 from sagging.
4, 85 and 86 are fixed, and the belt 30 passes over the upper surface of each stay 84, 85 and 86.

As shown in FIGS. 1 to 3, one end 40a of the cylinder 40 is attached to a support member 42 fixed to the support frames 11 and 12, and the other end 40b is attached to a support member fixed to the support frames 11 and 12. 43, respectively.

The cylinder 40 is a single-acting air cylinder, and a tube 44 for supplying and extracting air from the cylinder 40 is routed inside the support frame 11, and the end of the tube 44 is connected to a connector 45. It is connected to the ventilation hole 46 via. This ventilation hole 46 passes through the support frame 13, and a connector 47 is provided at the end of the ventilation hole 46. The connecting tool 47
is connected to a tube 48 connected to an air control mechanism (not shown). When air is supplied from the air control mechanism to the cylinder 40 through the vent hole 46 and the tube 44, the piston rod 41 moves leftward from the position shown in FIG. When air is removed by the air control mechanism, the piston rod 41 is retracted from its protruding position to the retracted position shown in the figure by the biasing force of a built-in spring member.
Further, a connecting member 49 is fastened to the piston rod 41.

As shown in FIG. 1, FIG. 2, and FIG. A shaft portion 62a integral with the sprocket wheel 62 is rotatably supported by the sprocket wheels 2a and 2b.

As shown in FIGS. 1 to 6, the moving member 50 consists of two moving plates 51, 52, one end of which is fixed to the connecting member 49, and the other end is bolted. They are connected by 53.

The base portions 51a and 52a of each moving plate 51 and 52 are
It is slidably guided by guide members 53 and 54 fixed to the fixed plate 87. Each base 51a, 52a
Notches 51c and 52c are formed in the center portions of the vertical wall portions 51b and 52b bent from the vertical wall portions so as not to interfere with the sprocket wheel 62 and the like when reciprocating in conjunction with the piston rod 41. There is.

As shown in FIGS. 1, 4, and 6, the claw member 70 includes a shaft portion 71 rotatably supported by the vertical walls 51b and 52b, and a shaft portion 71 fixed to the shaft portion 71. It consists of a ratchet member 72 and a spring member 73.

The ratchet member 72 is formed into a wheel shape, and a plurality of locking pawls 72a that mesh with the chain 63 are formed on a part of the outer periphery. A locking pin 74 that comes into contact with the cut surface 72b of the ratchet member 72 and locks the cut surface 72b is attached to the vertical wall portion 51.
It is protruding from b. A spring member 73 is hooked to a spring hook pin 75 and a locking pin 74 which are protruded from the ratchet member 72, and the spring member 73 allows the ratchet member 72 to have its cut surface 72b contact the locking pin 74. It is biased in the direction of contact.

As shown in FIGS. 4 and 6, the base 5
An auxiliary plate 88 for preventing the chain 63 from slackening and coming off the sprocket wheel 62 is fixed to the lower end surfaces of the sprocket wheels 1a and 52a. A central portion 88a of the auxiliary plate 88 is recessed from its left and right ends, and a slight gap 88b is provided between the central portion 88a and the chain 63.

In the intermittent drive conveyor 1 having the above configuration,
As shown in the figure, when the piston rod 41 is retracted, air is sent from the air control mechanism (not shown) to the cylinder 40 through the tube 48, the vent hole 46, and the tube 44.
The piston rod 4 resists the spring member built into the
1 protrudes to the left in the figure, and along with the piston rod 41, the movable plates 51, 52 also move the guide members 53,
54 to move leftward from the position shown in FIG.

When the movable plates 51 and 52 move leftward from the position shown in FIG.
The locking pin 74 pushes the cut surface 72b of the ratchet member 72 while the meshing state between the chain 63 and the chain 63 is maintained by the bias of the spring member 73.
The locking pawl 72a of the ratchet member 72 moves the chain 63 to the left in the figure.

By moving the chain 63 to the left, the sprocket wheel 61 and roller 21 are rotated clockwise, thereby moving the chain 63 in the feeding direction.

When the air sent to the cylinder 40 by the air control mechanism is removed at the position where the chain 63 is sent,
The piston rod 41 is retracted from the protruding position by the biasing force of the spring member built into the cylinder 40.

When the movable plates 51 and 52 return from the feeding position to the right in the figure in conjunction with the retraction of the piston rod 41, the ratchet member 72 is pulled by the shaft portion 71 that is integrated with the movable plates 51 and 52, and the ratchet member 72 is also moved together with the moving plates 51 and 52. Move to the right. At this time, the ratchet member 72 is
Since the locking pawl 72a and the chain 63 can be rotated against the biasing force of the spring member 73 in the direction in which they disengage and escape, the chain 63 remains stopped by its own load and the ratchet member 72 , the movable plates 51, 52, etc. return to their original positions.

In this way, the parts that have fallen onto the belt 33 are intermittently fed in fixed amounts.

(Effects of the Invention) According to the intermittent drive conveyor according to the present invention, when the movable member moves in one direction, the claw member engages with a part of the chain to move the chain, thereby causing the belt to move. When the belt is fed in one direction and the movable member moves in the other direction, the claw member escapes from the chain and returns, leaving the chain behind, so that the belt can be fed intermittently. Since there is no need to use a drive source such as a motor, the entire conveyor is lightweight, and since the cylinder is placed in the gap between the tight and slack sides of the belt, the thickness of the conveyor does not need to be too thick. Furthermore, the machine and the intermittent feeding motion of the belt can be synchronized very easily, reducing manufacturing costs.

[Brief explanation of the drawing]

1 to 6 show one embodiment of the present invention, in which FIG. 1 is a partially cutaway perspective view, and FIG.
The figure is a plan view, FIG. 3 is a vertical sectional view of FIG. 2, FIG. 4 is an enlarged view of the left side of FIG. 3, and FIG. FIG. 6 is a sectional view taken along the - line in FIG. 3. 1... Intermittently driven conveyor, 10... Support frame, 21, 22... Roller, 30... Belt,
40...Cylinder, 41...Piston rod, 5
0... Moving member, 61, 62... Sprocket wheel, 63... Chain, 70... Claw member.

Claims (1)

[Claims] 1. In an intermittent drive conveyor in which a belt is wound around two rollers supported at both ends of a support frame and the belt is intermittently fed, the gap between the tight side and the slack side of the belt. a cylinder is disposed in the support frame, the cylinder is attached to the support frame so that the piston rod reciprocates along the moving direction of the belt, and a moving member capable of reciprocating along the moving direction of the belt is connected to the piston rod. a chain is wound around a sprocket wheel provided integrally with one of the two rollers and a sprocket wheel rotatably supported by a support member integral with the support frame; When the movable member moves in one direction, the movable member is restrained so as not to swing relative to the movable member and engages with a part of the chain to move the chain, and when the movable member moves in the other direction, the movable member An intermittent conveyor characterized by comprising a claw member that swings against the chain and escapes from the chain.