JPH11180523A - Carrying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carrying device which is capable of easily adjusting a feeding speed, simple in construction, low in weight, and less in troubles. SOLUTION: In a carrying device, a transfer chain 4a is applied across sprocket wheels 31a and 32a installed on two rotating shafts 1a and 2a disposed in parallel with each other, respectively, ratchet arms 522a and 522b of two sets of reverse preventing clutches 5a and 5b are installed so that a same directional rotation is applied to the rotating shaft 1a, and a tip end part 71a of a piston 7a of an air cylinder 6a and a tip end part 71b of a piston 7b of an air cylinder 6b disposed to each other so that, when one is moved forward, the other is moved backward are connected to the ratchet arms 522a and 522b, respectively. In this case, the operating strokes of the pistons 7a and 7b are allowed to be adjusted by a timer device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transport device for transporting articles, members and the like in a predetermined direction.

[0002]

2. Description of the Related Art As a transfer device for the above-mentioned purpose,
2. Description of the Related Art Conventionally, conveying devices such as a chain conveyor, a wood slat conveyor, and a belt conveyor driven by an electric motor such as a motor have been widely used.

[0003] In such a transport apparatus, it is usually necessary to change the transport speed according to the article to be transported and the process during or after transport. As a method of changing the transport speed in this manner, an inverter control method or a transmission has been generally used conventionally. Among them, the inverter control method has an advantage that the shift operation can be easily performed, but has a problem that it is heavy and expensive. In addition, a method using a transmission is also used, but this method is also heavy and expensive, and has a problem that maintenance cost is high due to its complicated structure.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is capable of easily adjusting the transport speed, and has a simple and lightweight structure. Therefore, it is an object of the present invention to provide a transfer device which has few failures, and therefore is inexpensive in equipment costs and maintenance costs.

[0005]

According to a first aspect of the present invention, a sprocket wheel is mounted on at least two rotating shafts disposed in parallel with each other. A transfer device in which a transfer chain is stretched between the transfer shafts. A driven side mechanism of a reverse rotation prevention clutch is mounted on one rotating shaft, and a cylinder is disposed at an eccentric position with respect to the rotating shaft on a drive side mechanism. The distal end of the piston of the mechanism is connected, and the working stroke of the piston is adjustable.

[0006] Further, according to a second aspect of the present invention,
A transport device in which a sprocket wheel is attached to at least two rotating shafts arranged in parallel, and a transport chain is stretched between the sprocket wheels, wherein two sets of reverse rotation prevention are performed on one rotating shaft. The driven side mechanism of the clutch for rotation is mounted so as to rotate in the same direction to the rotating shaft, and the drive side mechanisms of the above two sets of anti-reverse clutches are connected with the distal ends of the pistons of the cylinder mechanisms placed in opposite directions. When the piston of one cylinder mechanism moves forward, the piston of the other cylinder mechanism is arranged to retreat, and the working stroke of the piston is adjustable.

[0007] The sprocket wheel used in the present invention is provided for the purpose of transmitting the rotational motion of the rotating shaft to a transport chain, which will be described later. For example, a belt is stretched as the transport chain and friction is generated with the sprocket wheel. For example, there is a method in which a convex portion is provided on the outer periphery of the sprocket wheel so as to protrude outward, and the sprocket wheel is transported by a concave portion that can be fitted with the convex portion or a convex portion that can be engaged with the convex portion.

The transport chain used in the present invention includes, for example, (1) a chain (including a plurality of chains) only, and (2) a transport plate having a special shape on the chain. (3) a belt-like chain in which two left and right chains are provided in the traveling direction, and between which a plurality of divided plate-like bodies are fixed in a bendable manner, (4) For example, a flexible sheet belt may be used.

In the present invention, the reverse rotation preventing clutch means a mechanism for transmitting power only in one direction and not in the reverse direction, and includes a ratchet clutch for preventing reverse rotation and a roller clutch for preventing reverse rotation. Note that, in the reverse rotation prevention clutch, the driving side normally performs a reciprocating circular motion, and the driven side performs a rotational motion in one direction.

The cylinder mechanism used in the present invention includes, for example, an air cylinder, a hydraulic cylinder, and the like. The tip of a piston provided in the cylinder mechanism is the tip of the above-described reverse rotation preventing clutch or the arm connected thereto. , Which transmits either the forward or backward force of the piston to the rotating shaft, and is used for rotating the sprocket wheel only in one direction.

According to a second aspect of the present invention, two sets of driven-side reverse-prevention clutches are attached to one rotating shaft so as to rotate the rotating shafts in the same direction. The tip of the piston of the cylinder mechanism placed in the opposite direction is connected to the drive side mechanism of the reverse rotation prevention clutch so that when the piston of one cylinder mechanism moves forward, the piston of the other cylinder mechanism moves backward. By being disposed, the operating force of any one of the pistons is always used for rotating the rotating shaft, so that the rotation of the aforementioned sprocket wheel becomes continuous at a constant speed.

By adjusting the operating stroke or operating speed of the piston, the speed of the transport chain can be changed. However, since the operation stroke only extends the time for forcibly rotating the rotating shaft by lengthening the operation stroke, it is not suitable for continuous conveyance at a constant speed. Is preferred.

The method of changing the operation stroke includes, for example, (1) control of the switching timing of the supply / stop of the driving fluid to the cylinder mechanism, and (2) control of the switching timing of the driving fluid supply direction to the forward / backward movement. In addition to controlling the supply timing of the driving fluid such as control, installation of limit switches (stoppers) for fixedly controlling the operation stroke,
An operation stroke control by an optical sensor or a non-contact switch can be used. Examples of the method of changing the operation speed include changing the supply amount or supply pressure of the drive fluid, and specifically include a method of adjusting the opening of the flow rate adjustment valve of the drive fluid. .

According to the first aspect of the present invention, there is provided a piston which simply reciprocates simply by adjusting the working stroke of the piston without using an electric motor and an inverter control device or an electric motor and a transmission. And an anti-reverse clutch can provide an intermittent rotational movement to the rotating shaft, whereby the transport chain can be moved in one direction at a constant average speed, albeit intermittently.

According to a second aspect of the present invention, the rotation shaft is intermittently provided by the pistons of the two cylinder mechanisms and two sets of reverse rotation preventing clutches mounted so as to provide the rotation of the rotation shaft in the same direction. A continuous rotating motion can be given to the rotating shaft by repeating the intermittent rotating motion alternately, and the transport chain can be continuously moved in one direction at a constant average speed. Can be.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway side view showing the structure of the transfer apparatus of the present invention, and FIG. 2 is a plan view. As shown in FIGS. 1 and 2, the rotating shaft 1 and the rotating shaft 2 are arranged parallel to each other so as to be perpendicular to the transport direction (arrow A). A pair of sprocket wheels 31, 31 are mounted on the rotating shaft 1 on the left and right in the transport direction, and a pair of left and right sprocket wheels 32, 32 are also mounted on the rotating shaft 2. , 32 between the transport chains,
4 has been bridged.

A ratchet disk 51, which is a driven mechanism of a ratchet clutch (hereinafter simply referred to as "clutch") 5 for preventing reverse rotation, is attached to the rotating shaft 1. A pawl 511 is provided on the outer periphery of the ratchet disk 51 with a pin. Supported. The drive side mechanism is a ratchet wheel 52 provided with serrated internal teeth 521, and the pawl 511 is urged toward the internal teeth 521 by a spring 512. A ratchet arm 522 extends outward from the ratchet wheel 52, and a distal end of the ratchet arm 522 has a distal end portion of the piston 7 of the air cylinder 6 whose rear end is supported by a pin on the frame F of the transfer device. 71 are connected.

The air cylinder 6 has a front air supply port 6.
A control valve for switching the flow path of the compressed air to the front air supply port 61 or the rear air supply port 62 and a switching timing of the control valve can be adjusted. A timer device is provided (not shown).

Next, the operation of the transport device having the above configuration will be described. When the control valve is operated by the timer device and compressed air is supplied into the air cylinder 6 from the front air supply port 61, the piston 7 retreats, and the ratchet arm 522 makes an arc movement counterclockwise. As a result, the pawls 511 of the ratchet disc 51 are caught on the internal teeth 521 of the ratchet wheel 52, and the ratchet disc 51 also rotates counterclockwise, and the sprocket wheels 31, 31 attached to the rotating shaft 1 rotate counterclockwise. The transport chains 4, 4 are sent in the direction of arrow A, that is, forward.

Next, when the supply of the compressed air to the air cylinder 6 is stopped by switching the control valve to the neutral position by the timer device, the piston 7 is stopped, and the transport chains 4, 4 are stopped.

Next, when the control valve is switched by the timer device and compressed air is supplied from the rear air supply port 62 into the air cylinder 6, the piston 7 moves forward, and the ratchet arm 522 circularly moves clockwise. However, the ratchet wheel 52 idles and the ratchet disk 51 stops because the pawl 511 does not touch the internal teeth 521.

Further, the control valve is switched, and compressed air is again supplied from the front air supply port 61 of the air cylinder 6 to the air cylinder 6.
Supply inside. Thereafter, the above exercise is repeated. In this way, the transport chains 4 and 4 are intermittently sent in the direction of arrow A by a fixed distance, and are transported.

In the above-described transfer device, the operation stroke of the piston 7 can be easily adjusted by changing the switching timing of the control valve by the timer device, whereby the movement of the transfer chain 4 for each stroke of the piston 7 can be achieved. The distance can be adjusted.

FIG. 3 is a partially cutaway side view showing the structure of the transfer apparatus according to the second aspect of the present invention, and FIG. 4 is a plan view.

Two sets of clutch mechanisms 5a and 5b are mounted on the rotating shaft 1a of the transfer device shown in FIGS.
The clutch mechanisms 5a and 5b have the same structure as the clutch mechanism 5 shown in FIGS. 1 and 2, and are mounted so as to rotate the rotating shaft 1a counterclockwise.

Ratchet arm 52 of clutch mechanism 5a
2a and the ratchet arm 522b of the clutch mechanism 5b are mounted so as to have the same positional relationship with respect to the rotating shaft 1a, and the ratchet arm 522a is connected to the tip 71a of the cylinder 7a of the air cylinder 6a. The arm 522a has an air cylinder 6
a and a tip 71b of a piston 7b of an air cylinder 6b placed in the opposite direction. by this,
When the piston 7a moves forward, the piston 7b moves backward, and when the piston 7a moves backward, the piston 7b moves forward.

Next, in the transfer device configured as described above, compressed air is supplied into the air cylinder 6a from the rear air supply port 62a of the air cylinder 6a, and at the same time, the front air supply port 61b of the air cylinder 6b is supplied. When compressed air is supplied into the air cylinder 6b from above, the piston 7a moves forward and the piston 7b moves backward (the state of FIGS. 3 and 4). As a result, as in the case of the transfer device shown in FIGS. 1 and 2, even if the piston 7a moves forward, the ratchet arm 522a idles, and the rotating shaft 1a does not rotate. However, at the same time, the ratchet arm 522
b rotates the ratchet disk of the clutch mechanism 5b counterclockwise, the rotating shaft 1a rotates counterclockwise, and the transport chains 4a, 4a are sent in the direction of arrow A.

Next, compressed air is supplied into the air cylinder 6a from the front air supply port 61a of the air cylinder 6a,
At the same time, when compressed air is supplied into the air cylinder 6b from the rear air supply port 62b of the air cylinder 6b, the piston 7
a moves backward and the piston 7b moves forward. As a result, the ratchet arm 522b idles, but the ratchet arm 5
22a rotates the ratchet disk of the clutch mechanism 5a counterclockwise, the rotating shaft 1a rotates counterclockwise, and the transport chains 4a, 4a are sent in the direction of arrow A.

Thus, the two air cylinders 6
a, 6b and two sets of clutch mechanisms 5a, 5b mounted so as to give rotation in the same direction to the rotating shaft 1a, so that the rotating shaft 1a is given continuous rotating motion, and the transport chain 4a is moved in one direction. Is continuously moved at a constant average speed.

In the transfer device shown in FIGS. 3 and 4, the operation stroke of the pistons 7a and 7b can be easily adjusted by changing the switching timing of the control valve by the timer device, and the moving distance of the transfer chain 4a can be reduced. Can be adjusted. It is necessary to synchronize the forward / backward movement of the piston 7a and the backward / backward movement of the piston 7b. Therefore, only one set of the timer device can be used, and two sets of control valves for the pistons 7a and 7b can be provided. I just need.

Although the embodiments of the present invention have been described above, the specific configuration is not limited to the above, and the present invention includes design changes and the like without departing from the gist of the present invention.

For example, in the above embodiment, the air cylinder is used as the cylinder mechanism, but a hydraulic cylinder may be used. In addition, the adjustment of the operating stroke of the piston is to change the timing of air supply to the air cylinder by the timer device and the control valve, but to change the installation position of the limit switch and the installation position of the optical sensor. It may be something.

A configuration may also be adopted in which a compressed air flow control valve is provided before or (and / or behind) the air cylinder and the opening thereof is adjusted to adjust the speed of the piston to change the transfer speed.

[0034]

As is apparent from the above description, the transfer apparatus of the present invention uses a cylinder mechanism and a reverse rotation preventing clutch which have a simple structure and operate simply. The structure is simpler and lighter than that of the machine, and the equipment cost is low. In addition, it is easy to adjust the transport speed, has few failures, and can be used if there is a working fluid supply source such as a compressed air pipe or a hydraulic device, so that operating costs and maintenance costs are low.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing the structure of the transport apparatus of the present invention according to claim 1.

FIG. 2 is a plan view of the transport device shown in FIG.

FIG. 3 is a partially cutaway side view showing the structure of the transfer device of the present invention according to claim 2;

FIG. 4 is a plan view of the transfer device shown in FIG. 3;

[Explanation of symbols]

1, 1a, 2, 2a Rotating shaft 31, 31a, 32, 32a Sprocket wheel 4, 4a Transport chain 5, 5a Ratchet clutch 51 Ratchet disk (driven side mechanism) 52 Ratchet wheel (drive side mechanism) 522, 522a, 522b Ratchet arm 6, 6a, 6b Air cylinder (cylinder mechanism) 61, 61a, 61b Front intake port 62, 62a, 62b Rear intake port 7, 7a, 7b Piston 71a, 71b Piston tip

Claims (2)

[Claims] 1. A transfer device in which a sprocket wheel is attached to at least two rotating shafts disposed in parallel, and a transfer chain is stretched between the sprocket wheels. Is mounted on the driven side mechanism of the reverse rotation preventing clutch, the drive side mechanism is connected to the tip of the piston of the cylinder mechanism at an eccentric position with respect to the rotation shaft, and the operating stroke of the piston is adjustable. A conveying device characterized by the above-mentioned. 2. A transfer device in which a sprocket wheel is attached to at least two rotating shafts arranged in parallel, and a transfer chain is stretched between the sprocket wheels. The driven side mechanisms of the two sets of reverse rotation preventing clutches are mounted so as to impart the same rotation to the rotating shafts, and the driving side mechanisms of the two sets of reverse rotation preventing clutches have pistons of a cylinder mechanism placed in opposite directions. Are connected such that when the piston of one cylinder mechanism moves forward, the piston of the other cylinder mechanism moves backward, and the working stroke of the piston is adjustable. apparatus.