JP2023000437A - Conveyor - Google Patents

Abstract

A transport device capable of transporting a work along a reference plane is provided. A conveyor 30 capable of conveying a work W, a large number of reference rollers 34 arranged along one side wall of the conveyor 30, and the side wall on which the reference rollers 34 are arranged are positioned on the lower side. The conveyor 30 includes a timing belt 33 on which a workpiece can be placed, and a rotary drive source 35 that imparts a rotational driving force to the timing belt 33. According to the conveying device 10 characterized by comprising [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a transport device for transporting a work.

2. Description of the Related Art Conventionally, a device described in Japanese Unexamined Patent Application Publication No. 2002-200001 is known as a transfer device for transferring a work. This conveying device conveys a long strip in the conveying direction, and includes a roller conveyor in which rollers are arranged at regular intervals in the front-rear direction, a reference roller provided along one side surface of the roller conveyor, and the reference roller. A pressing means is provided on a side surface facing the roller and presses an object to be conveyed against the reference roller, and the side surface having the reference roller is inclined so as to be lower than the side surface having the pressing means. . Therefore, the object to be transported can be transported along the reference surface.

Japanese Utility Model Laid-Open No. 3-56720

However, in the conveying apparatus described in Prior Patent 1, since the conveying means is a roller conveyer, when conveying a short object to be conveyed, there is a problem that the work shakes and deviates from the reference plane. In addition, it is necessary to reset the position of the pressing means each time the size of the workpiece changes, which causes problems such as poor working efficiency.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a conveying device capable of stably conveying a work. In order to achieve this object, the present invention provides a conveyor capable of transporting works, a large number of reference rollers arranged along one side wall of the conveyor, and a side wall on the side where the reference rollers are arranged facing downward. a base for tilting and supporting the conveyor so as to position the conveyor, the conveyor having an endless belt on which a workpiece can be placed, and a rotary drive source for imparting a rotary drive force to the endless belt. It is characterized by Preferably, the endless belt is a timing belt, and the timing belt is engaged with a pulley rotated by being driven by the rotary drive source. Further, the endless belt includes a first belt located on the side of the reference roller and a second belt located above the first belt along the slope of the conveyor. It is preferable that the distance from the belt is set to a predetermined dimension of 0.5 or more and 1 or less times the width of the work. Further, it is preferable that the distance between the center point of the reference roller and the center point of the adjacent reference roller is set to be 0.5 times or less the length dimension of the work.

According to the conveying apparatus of the present invention, since the conveyor is a belt conveyor that drives the endless belt by driving the rotary drive source, the workpiece is less likely to shake and is less likely to come off the reference roller than the conventional roller conveyor. Therefore, there are advantages such as stable work. In addition, since the workpiece is slid down along the slope of the endless belt, and the workpiece that has slid down is supported and conveyed by the reference roller, the side surface of the reference roller can be used as a reference surface for conveyance regardless of the size of the workpiece. In this way, since workpieces of various sizes can be transported along the same reference plane, there is no need for a changeover operation, and there are advantages such as improved workability. Since the endless belt is a timing belt that engages with pulleys, it is possible to control the amount of movement of the timing belt by controlling the amount of rotation of the motor, and as a result, it is possible to control the position of the workpiece on the timing belt. There is also In addition, the endless belt consists of a first belt and a second belt, and since these belts are installed at such an interval that the work does not fall off, the contact area between the work and the belt is relatively small, and the work is conveyed. It becomes easy to slide down along the slope of As a result, the workpiece can more easily hit the reference roller, and there is an advantage that the stability is further improved. Furthermore, since the center of the reference roller and the center of the adjacent reference roller are set at an interval of less than half the length dimension of the work, the work can always be supported by two or more reference rollers, and the inclination of the work can be prevented. It also has the advantage of preventing

It is a perspective view which shows the structure of the conveying apparatus which concerns on this invention. FIG. 4 is an enlarged rear view showing the structure of the rear end portion of the conveying device according to the present invention; FIG. 4 is an enlarged, partially cutaway plan view of a main portion showing the structure of the rear end portion of the conveying device according to the present invention; FIG. 4 is an enlarged, partially cutaway plan view of a main portion showing the structure of the front end portion of the conveying device according to the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described based on the drawings. 1 to 4, reference numeral 10 denotes a transport device for forwardly transporting the workpieces W and W' supplied from the rear. and a controller (not shown) for controlling the driving of the conveyor 30 . In this embodiment, both the works W and W' are plate-shaped members, and the lateral dimension of the work W' (hereinafter referred to as the width dimension) is about 0.8 times the width of the work W. is set to

The base 20 has a bone portion 21 extending in the front-rear direction, and a plurality of support portions 22 are provided on the bone portion 21 at predetermined intervals in the front-rear direction. These support portions 22 are composed of a short member 23 extending in the vertical direction, a long member 24 longer than the short member 23, and an inclined plate 25 bridged over the upper ends thereof. As shown in FIG. 2, the short members 23 and the long members 24 are arranged with a predetermined gap in the horizontal direction. It is slanted and fixed so as to face the Further, the conveyor 30 is fixed on the inclined plate 25, and the conveyor 30 is also gradually inclined downward toward the side supported by the strips 23. As shown in FIG. In this embodiment, the short members 23 and the long members 24 of the support portion 22 are dimensioned so that the inclined plate 25 is inclined 10 degrees with respect to the horizontal plane.

The conveyor 30 is fixed to the inclined plate 25 of the support part 22 and has a frame 31 inclined parallel to the inclined plate 25 . The frame 31 is composed of a pair of plate members extending in the front-rear direction, and driven pulleys 321 and 322 are rotatably supported at the rear end and the front end. These driven pulleys 321 and 322 are timing pulleys having gears (not shown) formed on their outer peripheries. 33 is wrapped around. The timing belt 33 has gears (not shown) that mesh with the driven pulleys 321 and 322 on its inner surface. 331 and a second belt 332 located above are arranged in parallel. The interval between the first belt 331 and the second belt 332 is set to a predetermined dimension that is 0.5 times or more the width of the work W and less than 1 time the width of the work W'. Therefore, the workpiece W is prevented from falling from the upper side of the second belt 332 and the workpiece W′ is prevented from falling between the first belt 331 and the second belt 332 . In the conveyer 30, a large number of rotatably cylindrical reference rollers 34 are arranged at equal intervals in the longitudinal direction on the lower side wall of the timing belt 33. is parallel to the upper surface of the timing belt 33 (hereinafter referred to as the conveying surface) and its outer peripheral surface protrudes above the lower first belt 331 . Therefore, the work W placed on the conveying surface is guided forward with its side surface in contact with the outer peripheral surface of the reference roller 34 . Further, these reference rollers 34 are installed so that the width between their center points and the center points of the adjacent reference rollers 34 is less than half the dimension of the works W, W' in the longitudinal direction (hereinafter referred to as the length dimension). The works W and W' are always supported by two or more reference rollers 34. As shown in FIG.

A motor 35, which is an example of a rotational drive source, is fixed to the frame 31. As shown in FIG. The output shaft of the motor 35 is connected to a driving pulley 36 that can rotate integrally therewith. from the driving pulley 36 to the driven pulley 321 on the rear end side. Since the motor 35 and the driven pulley 321 on the rear end side are connected to each other through the power transmission belt 37 , the rotational driving force of the motor 35 is transmitted to the timing belt 33 . As a result, the timing belt 33 is rotationally driven by the motor 35 so that the conveying surface can move forward at a constant speed.

Further, the frame 31 is provided with holding rollers 41 and 42 behind and in front of the timing belt 33 as shown in FIGS. The holding rollers 41 and 42 are rotating members that are obliquely provided so as to be parallel to the driven pulleys 321 and 322 and the conveying surface, and their upper end portions are at the same height as the conveying surface and at the edge of the conveying surface. and the upper ends of the holding rollers 41 and 42 are arranged so that the distance between them is less than half the length of the workpieces W and W'. Therefore, the works W and W' located at the ends of the timing belt 33 are supported by being brought into contact with the conveying surface and the holding roller 41 or the holding roller . Moreover, the conveyor 30 is provided with an entry sensor 43 and an exit sensor 44 capable of detecting the works W, W' on the transport path of the works W, W'. The entrance sensor 43 is an optical sensor or the like that emits light L1 from the light projecting portion arranged opposite to the light receiving portion, and is arranged so that the light L1 passes right above the rear holding roller 41. ing. Therefore, when the works W and W' block the light L1 of the entry sensor 43, it is detected that the works W and W' are positioned on the rear holding roller 41. FIG. On the other hand, the discharge sensor 44 is an optical sensor configured in the same manner as the entrance sensor 43, and is arranged so that the light L2 emitted from the light projecting portion toward the light receiving portion passes through a predetermined position on the conveying surface. It is

The entry sensor 43, the discharge sensor 44, and the motor 35 are connected to the control section, and the control section drives the motor 35 when the entry sensor 43 detects the works W and W'. After the ejection sensor 44 detects the same number of works W, W' as the entry sensor 43, the motor 35 is stopped. Further, work machines (not shown) are provided in front and rear of the conveying apparatus 10, respectively. , and the front working machine has receiving means for nipping the works W and W' reaching the holding rollers 42 on the front side and receiving them into the front working machine. These supply means and reception means are also connected to the control unit.

Next, the operation of the conveying device 10 configured as described above will be described. First, the rear work machine drives the supply means, and the workpiece W is placed on the rear holding rollers 41 and 42 . At this time, the work W slides along the inclination of the holding roller 41 and contacts the reference roller 34 with its lower side surface. At this time, the interval between the reference rollers 34 is set to be half or less of the length dimension of the work W as described above, so that two or more reference rollers 34 are always in contact with each other. are aligned parallel to the transport direction. Also, the work W blocks the light L1 from the entry sensor 43 when placed on the rear holding roller 41 . When the light L1 is blocked, the entry sensor 43 determines that the workpiece W is placed on the rear holding roller 41 and outputs a drive signal to the rotary drive source. Upon receiving the drive signal, the rotary drive source starts rotary drive so that the conveying surface of the timing belt 33 advances. When the front end of the work W comes into contact with the timing belt 33 , the work W is pulled by the timing belt 33 and conveyed forward, and transferred from the rear holding rollers 41 to the timing belt 33 . At this time, as described above, the space between the conveying surface of the timing belt 33 and the holding rollers 41 and 42 is set to be less than half the length of the work W, so that the work W does not fall between them. is prevented. At this time, since the upper side of the conveying surface is open as described above, the work W comes into contact with the reference roller 34 at its lower side surface, and moves along the slope of the conveyor 30 from the second belt 332 at its upper side surface. It is conveyed in a state of protruding upward.

The work W transferred onto the timing belt 33 as described above is conveyed forward as the timing belt 33 rotates. At this time, since the conveyor 30 is a belt conveyor that conveys the work W by the timing belt 33, the work W can be conveyed regardless of the length dimension of the work W. hard to come off. In addition, the timing belt 33 is composed of the first belt 331 and the second belt 332 which are spaced apart, and the contact area between the work W and the timing belt 33 is relatively small. It becomes easier to slide along the slope of the belt 33. At this time, since the gap between the first belt 331 and the second belt 332 is set to 0.5 times or more the width dimension of the work W, the work W may drop from the upper side of the second belt 332. There is no Furthermore, since the reference roller 34 is rotatable, frictional resistance is less likely to occur at the point of contact between the reference roller 34 and the workpiece W, which hardly interferes with conveyance. As a result, the lower side surface of the work W can easily be brought into contact with the reference roller 34, and even if the posture of the work W should be lost during transportation, the lower side surface of the work W can be brought into contact with the reference roller 34 so that the work can be immediately aligned. . As a result, the conveyor 30 can convey the work W forward while stabilizing the work W along the reference roller 34 . After that, when the work W blocks the light L2 of the discharge sensor 44, the control unit makes the receiving means of the work machine in front stand by near the holding roller 42 in front. Further, since the endless belt of the conveyor 30 is the timing belt 33 that meshes with the driven pulleys 321 and 322, the control section can control the position of the workpiece W on the timing belt 33 by controlling the amount of rotation of the motor 35. Become. Therefore, when the work W reaches the front holding rollers 42, the work W is held by the receiving means. In addition, since the conveyed work W is aligned along the reference plane, the receiving means can hold the work W in a correct posture. As a result, the work W is prevented from falling off while being transported by the receiving means, and the work W does not need to be separately aligned after being transported to the work machine in front, resulting in high efficiency.

As described above, when the workpiece W is transferred from the front holding roller 42 to the timing belt 33 and the light L1 from the entry sensor 43 can pass through, the control section outputs a drive signal to the supply means, and the next stage The workpiece W' is placed on the rear holding rollers 41. As shown in FIG. At this time, since the gap between the first belt 331 and the second belt 332 is set to be less than 1 times the width of the work W', the work W' does not drop between them. Since the conveying surface is thus inclined and supported by the first belt 331 and the second belt 332, the work W' also slides down the inclined surface and comes into contact with the reference roller . As a result, the workpiece W is aligned on the same reference plane. In this way, it is possible to make works W' of different sizes run along the reference roller 34 without changing the stage, so that two types of works W can be alternately conveyed, and work efficiency is improved. .

The conveying device 10 according to the present invention is not limited to the one described above, and various modifications can be made without departing from the gist of the invention. For example, the number of timing belts 33 is not limited to two, ie, the first belt 331 and the second belt 332, and may be changed according to the size of the work W as appropriate. As an example, when conveying a work W'' whose width is set to be about 1.5 times that of the work W, the distance between the work W'' and the first belt 331 should be at least half the width of the work W''. A third belt (not shown) is also preferably provided. Also, by wrapping an endless belt (not shown) around the outer periphery of the reference roller 34, even a work having a very short length can be conveyed.

DESCRIPTION OF SYMBOLS 10... Conveyor 30... Conveyor 33... Timing belt 331... First belt 332... Second belt 34... Reference roller 35... Motor 40... Holding roller W... Work

Claims (4)

A conveyor capable of conveying a work, a large number of reference rollers arranged along one side wall of the conveyor, and the conveyor being inclined and supported so that the side wall on which the reference rollers are arranged is located on the lower side. a base;
A conveying device, wherein the conveyor includes an endless belt on which a workpiece can be placed, and a rotary drive source for imparting a rotary drive force to the endless belt. 2. The conveying apparatus according to claim 1, wherein the endless belt is a timing belt, and the timing belt is engaged with a pulley that is rotated by being driven by the rotary drive source. The endless belt includes a first belt positioned on the side of the reference roller and a second belt positioned above the first belt along the slope of the conveyor,
3. The transport according to claim 1 or claim 2, wherein the space between the first belt and the second belt is set to a predetermined dimension of 0.5 or more and 1 or less times the width of the workpiece. Device. 4. The distance between the center point of the reference roller and the center point of the adjacent reference roller is set to be 0.5 times or less of the length of the workpiece. 1. The conveying device according to claim 1.

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