JP2010042907A - Workpiece conveying device and wrapping apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a workpiece conveying device which easily and inexpensively conveys workpieces spaced at prescribed intervals, and a wrapping apparatus equipped with the workpiece conveying device. <P>SOLUTION: Since a workpiece conveyance speed of a first conveying means 21 is set to be faster than that of a second conveying means 22, the rear end portion of a plurality of workpieces A conveyed by the second conveying means 22 is abutted on the distal end portion of a workpiece conveyed by the first conveying means 21, so that the workpieces are conveyed continuously in their conveyance direction in mutually abutted conditions. Since the workpiece conveyance speed of a third conveying means 23 is set to be faster than that of the second conveying means 22, several workpieces A handled by the third conveying means 23 are conveyed continuously in their conveyance direction and mutually separated at prescribed intervals. The workpiece conveying device can therefore convey the workpieces A easily and inexpensively at prescribed intervals. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a workpiece conveyance device that conveys a workpiece at a predetermined interval and a wrapping device including the workpiece conveyance device.

A technique described in Patent Document 1 is known as an example of a workpiece transfer device that transfers workpieces at predetermined intervals.
This workpiece transfer device is arranged between an upstream conveyor and a downstream conveyor, and an adjustment conveyor that delivers transfer articles, and a variable speed of two or more stages of low speed and high speed to adjust the interval between the transfer articles. Variable speed driving means for driving the adjustment conveyor, an entrance passage sensor that is installed near the entrance of the adjustment conveyor and detects that a conveyed article has arrived / passed, and the allowable passage based on information detected by the entrance passage sensor. Speed control means for outputting a signal for controlling the speed change drive means,
If the speed control means determines that the passing time interval between the transported articles is shorter than the scheduled time interval based on the information detected by the entrance passage sensor, the difference between the passing time interval and the scheduled time interval The variable speed driving means outputs a signal for reducing the operation speed of the adjusting conveyor according to the size of the early arrival time, and passes between the conveyed articles based on information detected by the entrance passage sensor. If it is determined that the time interval is longer than the scheduled time interval, the variable speed driving means determines the operating speed of the adjusting conveyor according to the length of the extension time that is the difference between the passing time interval and the scheduled time interval. When a signal for increasing the speed is output and it is determined that the passage time interval between the transported articles is equal to the scheduled time interval based on the information detected by the entrance passage sensor, the variable speed drive Means is characterized by outputting a signal to maintain the operating speed of the adjustment conveyor.
Japanese Patent Laying-Open No. 2005-145608

  However, in the conventional workpiece transfer apparatus as described above, a variable speed drive means such as a servo motor that drives the adjustment conveyor, an encoder that is built in the variable speed drive means and detects the amount of movement of the adjustment conveyor, Since an entrance passage sensor such as a photosensor that detects the passage of the conveyed article provided near the entrance and a control panel for controlling these sensors are required, there is a problem that the apparatus configuration becomes complicated and expensive.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a work transport device that transports workpieces at predetermined intervals easily and inexpensively without an adjustment conveyor that requires fine control, and a wrapping device that includes the work transport device. The issue is to provide.

In order to solve the above-described problem, the invention described in claim 1 is a workpiece transfer device that transfers the workpiece A at a predetermined interval, as shown in FIGS. 1 and 2, for example.
First conveying means 21 that conveys the workpiece A at a constant speed, second conveying means 22 that is provided downstream of the first conveying means 21 and conveys the workpiece A at a constant speed, and the second conveying means. 22 is provided on the downstream side of the second conveying means 23 for conveying the workpiece A at a constant speed,
The workpiece conveying speed of the first conveying means 21 is transferred from the first conveying means 21 to the second conveying means 22 to the rear end portion of the last workpiece A being conveyed by the second conveying means 22. It is set faster than the workpiece conveying speed of the second conveying means 22 so that the tip end of the workpiece A abuts.
The work transfer speed of the third transfer means 23 is such that the rear end of the work A transferred from the second transfer means 22 to the third transfer means 23 and transferred by the third transfer means 23 is It is characterized in that it is set to be faster than the work conveying speed of the second conveying means 22 so as to be separated from the leading end portion of the leading work A being conveyed by the conveying means 22.

According to the first aspect of the present invention, the work transfer speed of the first transfer means 21 is set from the first transfer means 21 to the second end of the last work A being transferred by the second transfer means 22. Since the work transfer speed of the second transfer means 22 is set so as to be in contact with the tip of the work A transferred to the transfer means 22, a plurality of works A transferred by the second transfer means 22 are transferred. It is conveyed in a state that is continuous in the direction and in contact with each other.
The work transfer speed of the third transfer means 23 is such that the rear end portion of the work A transferred from the second transfer means 22 to the third transfer means 23 and transferred by the third transfer means 23 is the second transfer means. 22 is set so as to be faster than the workpiece conveying speed of the second conveying means 22 so as to be separated from the tip of the first workpiece A being conveyed by the plurality of workpieces A. Therefore, the plurality of workpieces A conveyed by the third conveying means 23 are conveyed. It is conveyed in a state that is continuous in the direction and separated from each other by a predetermined interval.
Therefore, the workpiece A can be conveyed at a predetermined interval easily and inexpensively.

The invention according to claim 2 is the workpiece transfer apparatus according to claim 1,
Each of the first conveying means 21, the second conveying means 22, and the third conveying means 23 is arranged at predetermined intervals in the conveying direction of the workpiece A, and a plurality of same diameters that rotate while contacting the lower surface of the workpiece A Consists of transport rollers 2,
The plurality of transport rollers 2 of the first transport means 21 rotate at a constant rotational speed, and the plurality of transport rollers 2 of the second transport means 22 are a constant rotational speed that is slower than the transport rollers 2 of the first transport means 21. The plurality of transport rollers 2 of the third transport means 23 rotate at a constant rotational speed faster than the transport rollers 2 of the second transport means 22.

According to the invention described in claim 2, the first conveying means 21, the second conveying means 22, and the third conveying means 23 are respectively a plurality of conveying rollers 2 having the same diameter that rotate while contacting the lower surface of the workpiece A. Since it is comprised, the workpiece | work A can be conveyed with the stable attitude | position.
The plurality of transport rollers 2 of the first transport means 21 rotate at a constant rotational speed, and the plurality of transport rollers 2 of the second transport means 22 are a constant rotational speed that is slower than the transport rollers 2 of the first transport means 21. The plurality of conveying rollers 2 of the third conveying means 23 rotate at a constant rotational speed faster than the conveying rollers 2 of the second conveying means 22, so that the first conveying means 21 and the second conveying means 22 are rotated. The workpiece transfer speed of the third transfer means 23 can be easily set.

Invention of Claim 3 is a wrapping apparatus provided with the workpiece conveyance apparatus of Claim 2, as shown, for example in FIGS. 1-4,
Wrapping the decorative sheet B around the plurality of workpieces A around the upper and side surfaces of the plurality of workpieces A conveyed by the second conveyance unit 22 and the third conveyance unit 23, and the lower surface where the conveyance rollers 2 do not contact. Means 1;
Detection means 30 for detecting gaps S between a plurality of workpieces A, around which a decorative sheet B is wound, conveyed by the third conveying means 23;
And a cutting device 33 provided on the downstream side of the third conveying means 23 and for cutting the decorative sheet B located in the gap S between the workpieces A and A detected by the detecting means 30. .

  According to the third aspect of the present invention, the decorative sheet is provided by the wrapping means 1 on the upper and side surfaces of the plurality of workpieces A conveyed by the second conveying means 22 and the third conveying means 23 and the lower surface where the conveying rollers 2 do not contact. B is wound, and a gap S between the plurality of works A and A around which the decorative sheet B is wound is detected by the detection means 30, and the makeup located in the gap S between the works A and A detected by the detection means 30 Since the sheet B is cut, a plurality of works A around which the decorative sheet B is individually wound can be easily obtained.

The invention according to claim 4 is the wrapping apparatus according to claim 3,
The detection unit 30 includes a light projecting unit 31a and a light receiving unit 31b arranged at positions sandwiching the third transport unit 23 in a direction intersecting the transport direction of the workpiece A,
When the light projected from the light projecting unit 31a is received by the light receiving unit 31b through the decorative sheet B and the gap S, this is detected, and the detected information and the work transport speed of the third transport unit 23 are detected. And a control unit 32 that controls the cutting blade 34a of the cutting device 33 so as to cut the decorative sheet B positioned in the gap S between the workpieces A and A.

  According to the invention described in claim 4, when the light projected from the light projecting unit 31a is received by the light receiving unit 31b through the gap S between the decorative sheet B and the workpieces A, A, this is detected. Thus, the time when the gap S crosses between the light projecting unit 31a and the light receiving unit 31b can be obtained as detection information. And since the distance between the said detection position and the cutting blade 34a of the cutting device 33 and the workpiece conveyance speed of the 3rd conveyance means 23 are preset in the control part 32, the said clearance gap S is a cutting blade from the said detection position. It is possible to calculate the time for transporting to the position 34a. Therefore, the decorative sheet B positioned in the gap S between the workpieces A and A can be reliably cut by the cutting blade 34a.

According to the present invention, the workpiece conveying speed of the first conveying means is set to the rear end portion of the last workpiece conveyed by the second conveying means, and the tip of the workpiece transferred from the first conveying means to the second conveying means. Since the part is set to be faster than the workpiece conveying speed of the second conveying unit, the plurality of workpieces conveyed by the second conveying unit are conveyed in a state where they are continuous in the conveying direction and in contact with each other, The work transfer speed of the third transfer means is such that the rear end portion of the work that is transferred from the second transfer means to the third transfer means and transferred by the third transfer means is the first transfer that is transferred by the second transfer means. Since it is set faster than the workpiece transfer speed of the second transfer means so as to be separated from the tip of the workpiece, the plurality of workpieces transferred by the third transfer means are continuous in the transfer direction and separated from each other by a predetermined interval. It is conveyed in a state. Therefore, the workpiece can be conveyed at a predetermined interval easily and inexpensively.
In addition, a decorative sheet is wound around the upper surface, side surface, and lower surface where the conveying roller is not in contact with the plurality of workpieces conveyed by the second conveying means and the third conveying means by the wrapping means, and between the plurality of workpieces around which the decorative sheet is wound. Is detected by the detection means, and the decorative sheet positioned in the gap between the workpieces detected by the detection means is cut, so that a plurality of works around which the decorative sheets are individually wound can be easily obtained.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing a workpiece conveying device according to the present invention, FIG. 2 is a schematic configuration diagram showing a cutting device of a wrapping device according to the present invention, and FIG. 3 is a perspective view showing a main part of the wrapping device according to the present invention. FIG. 4 is an affirmative view showing a process of winding a decorative sheet around a work by the lapping apparatus according to the present invention.

First, the wrapping apparatus will be described with reference to FIG. 3 and FIG.
This wrapping apparatus is provided with wrapping means 1 for winding the decorative sheet B around the upper surface and side surfaces of the workpiece A and the lower surface where the conveying roller 2 does not contact.
The wrapping means 1 is for winding the decorative sheet B around a workpiece A that is long in the front and rear direction and has a rectangular cross section, and is configured as follows.

  That is, first, a conveying path for conveying the workpiece A is formed by a large number of conveying rollers 2..., And pressing rollers 3 for pressing the decorative sheet B against the workpiece A are disposed on both sides of the conveying path. The transport rollers 2 forming the transport path are arranged in a line so that their rotational directions coincide with each other, and are rotated in one direction by a drive source such as a motor (not shown). The workpiece A is transported in one direction (downstream) by the rotation of the transport roller 2 while being on the upper surface of the transport roller 2.

  The pressing roller 3 is made of rubber, soft synthetic resin, or the like, and is rotatably attached to the distal end portion of the support pipe 4. The support pipe 4 is attached to a fixed pipe 6 via an attachment member 5, and the fixed pipe 6 is fixed upright on a fixed block 7. Here, since it is necessary to set the direction of the pressing roller 3 to a desired angle, not only one support pipe 4 but also a plurality of support pipes 4 may be used. In this case, naturally, a plurality of mounting members 5 are used and appropriately connected. Is done.

Further, as the pressure roller 3 goes from the upstream side to the downstream side of the conveyance path, the pressure surface (outer peripheral surface) is sequentially arranged from the upper surface side to the lower surface side of the workpiece A to be conveyed. The pressing rollers 3 are arranged so that both sides thereof are symmetric with respect to the conveyance path.
As shown in FIG. 4A, the pair of pressing rollers 3 and 3 positioned at the uppermost stream of the conveying path are arranged so that the pressing surfaces (outer peripheral surfaces) press the upper surface of the workpiece A on which the decorative sheet B is placed. The pressing rollers 3 and 3 positioned behind the most upstream pressing rollers 3 and 3 have a pressing surface on the work A on which the decorative sheet B is placed as shown in FIG. It arrange | positions so that the upper surface side corner | angular part may be pressed. Further, as shown in FIG. 4 (c), the rear pressing rollers 3 and 3 are in positions to press the upper corners of the side surface of the workpiece A, and the rear pressing rollers 3 and 3 are in FIG. 4 (d). As shown in FIG. 4 (e), the pressing rollers 3a and 3a on the rear side of the workpiece A are pressed at the position where the side surface of the workpiece A is pressed. As shown in FIGS. 4 (f) and 4 (g), the pressing rollers 3 and 3 are positioned to press the lower surface side corners of the workpiece A, and the pressing rollers 3 and 3 behind the pressing rollers 3 and 3 are as illustrated in FIG. 4 (h). Are respectively disposed at positions where the lower surface of the workpiece A is pressed.

Here, the pressing rollers 3a and 3a shown in FIG. 4 (e) are different in shape from the other pressing rollers 3 and are not in a columnar shape but in an inverted dish shape, and the decorative sheet B is used as a work A on its tapered surface. It comes to push.
In addition, an attachment member 12, a connection pipe 13, an attachment member 14, and a suspension pipe 15 are sequentially connected to and attached to a predetermined fixed pipe 6 among the fixed pipes 6 that fix the pressing rollers 3. Further, a fixed roller 16 is provided at the lower end of the suspension pipe 15 arranged in the vertical direction. The fixed roller 16 is rotatably supported by a U-shaped support member 17 attached to the lower end of the suspension pipe 15, and is arranged so that its rotation direction coincides with the conveyance direction of the conveyance path. Is. The fixed roller 16 is made of rubber, soft synthetic resin, or the like, similarly to the pressing roller 3, and presses the upper surface of the work A, which is transported on the transport path with the decorative sheet B, through the decorative sheet B. Is.
A feeding device (not shown) for feeding the decorative sheet B is disposed on the upstream side of the wrapping device, and the decorative sheet B is coated with an adhesive on its back surface by the feeding device. It is sent to the vicinity of the upper surface of A.

  In order to wrap the decorative sheet B around the workpiece A with the wrapping apparatus having such a configuration, first, the front end of the decorative sheet B sent from the feeding device is aligned with the front end of the work A, and the front end portion of the decorative sheet B is in that state. Is attached to the upper surface of the tip of the workpiece A. In this case, the width of the decorative sheet B is determined in advance so as to cover the upper surface, both side surfaces of the workpiece A, and both side portions of the lower surface where the conveying roller 2 does not contact. When the decorative sheet B is stuck to the workpiece A, the center line of the decorative sheet B is made to coincide with the center line of the upper surface of the workpiece A.

Thus, after sticking the front-end | tip part of the decorative sheet B to the upper surface of the front-end | tip part of the workpiece | work A, the conveyance roller 2 ... is rotated and the workpiece | work A is moved to the downstream of a conveyance path.
Then, the decorative sheet B that moves together with the workpiece A is first adhered to the upper surface of the workpiece A by the pressing rollers 3 and 3 as shown in FIG. 4 (c), it is bent at the upper side corners of the workpiece A by being pressed by the pressing rollers 3 and 3, and further, both side portions of the workpiece frame A are formed as shown in FIG. Affixed to both sides. Further, as shown in FIG. 4 (e), it is bent at the corners on the lower surface side of the workpiece A by the pressing rollers 3a and 3a, and then along the flow shown in FIGS. 4 (f), (g) and (h). The decorative sheet B is wound around the workpiece A by sticking both sides of the decorative sheet B to the lower surface of the workpiece A.
The winding of the decorative sheet B shown in FIGS. 4A to 4H around the work A is gradually performed from the front end side to the rear end side of the work A, and the rear end of the work A is the most downstream side. The winding over the entire length of the workpiece A is completed by passing through the pressing rollers 3 and 3.

Next, the workpiece conveyance apparatus according to the present invention provided in the above wrapping apparatus will be described.
The workpiece conveying device 20 is provided in the conveying path of the wrapping device, and is provided on the downstream side of the first conveying means 21 with a first conveying means 21 that conveys the workpiece A at a constant speed, A second transport unit 22 that transports the workpiece A at a constant speed and a third transport unit 23 that is provided downstream of the second transport unit 22 and transports the workpiece A at a constant speed are provided. In the workpiece transfer device 20, a plurality of workpieces A are sequentially transferred by the first transfer unit 21, the second transfer unit 22, and the third transfer unit 23.

Each of the first transport unit 21, the second transport unit 22, and the third transport unit 23 includes a plurality of the transport rollers 2. As described above, the conveying rollers 2... Are arranged in a row so that their rotational directions coincide with each other, and are rotated in one direction by a driving source such as a motor (not shown).
The first transport unit 21 is constituted by, for example, three transport rollers 2. The three transport rollers 2 are all rotated in the same direction and at the same rotational speed by a drive source such as a motor (not shown).
Such a first conveying means 21 is disposed immediately before the wrapping apparatus, and is used to put the workpiece A conveyed from a molder line (not shown) into the wrapping apparatus. The molder line is a line for processing the workpiece A into a predetermined shape having a rectangular cross section.

The second conveying means 22 is constituted by, for example, five conveying rollers 2. These five transport rollers 2... Are rotated in the same direction and at the same rotational speed by a drive source such as a motor (not shown).
The rotational speed of the transport roller 2 of the second transport means 22 is slower than the rotational speed of the transport roller 22 of the first transport means 21. Here, the speed in the tangential direction of the rotating transport roller 2 is the work transport speed, so the work transport speed of the first transport means 21 is set faster than the work transport speed of the second transport means 22.

The workpiece transfer speed of the first transfer unit 21 is such that the workpiece transferred from the first transfer unit 21 to the second transfer unit 22 at the rear end of the last workpiece A transferred by the second transfer unit 22. It is set faster than the workpiece conveying speed of the second conveying means 22 so that the tip end of A comes into contact.
That is, as shown in FIG. 1B, when the preceding work A (A1) is being conveyed by the second conveying means 22, the succeeding work A is transferred from the first conveying means 21 to the second conveying means 22. When (A2) is transferred, the transport speed of the preceding work A (A1) is slower than the transport speed of the succeeding work A (A2). When changing to, it collides with and contacts the rear end of the preceding work A (A1).
When the leading end of the succeeding workpiece A (A2) comes into contact with the trailing end of the preceding workpiece A (A1), the trailing end of the preceding workpiece A (A1) rides on the first conveying means 21. At this time, the conveying roller 2 of the first conveying means 21 is moved to the following workpiece A (A2) by the subsequent workpiece A (A2). The preceding workpiece A (A1) is conveyed at the workpiece conveying speed of the second conveying means 22 by slipping at the contact portion.

The 3rd conveyance means 23 is comprised by seven conveyance rollers 2 ..., for example. These seven transport rollers 2... Are rotated in the same direction and at the same rotational speed by a drive source such as a motor (not shown).
The rotation speed of the conveyance roller 2 of the third conveyance means 23 is faster than the rotation speed of the conveyance roller 22 of the second conveyance means 22. Here, the speed in the tangential direction of the rotating transport roller 2 becomes the work transport speed, so the work transport speed of the third transport means 23 is set faster than the work transport speed of the second transport means 22.

The workpiece transfer speed of the third transfer means 23 is such that the rear end of the workpiece A transferred from the second transfer means 22 to the third transfer means 23 and transferred by the third transfer means 23 is transferred to the second transfer means 23. It is set faster than the work conveying speed of the second conveying means 22 so as to be away from the leading end of the first work A being conveyed by the means 22.
That is, as shown in FIG. 1 (d), when the plurality of workpieces A are conveyed in contact with each other by the second conveying means 22, the leading workpiece A (A 1) is transferred to the third conveying means 23. When transferred, the work transfer speed of the third transfer means 23 is faster than the work transfer speed of the second transfer means 22, so that the work A (A1) transferred to the third transfer means 23 is the next work A (A2), that is, the second transfer speed. 2 It is set apart from the leading work A (A2) being conveyed by the conveying means 22.
When the leading end of the first work A (A1) being transported by the second transport means 22 is transferred to the third transport means 23, the work A (A1) is slightly different from the next work A (A2). As the first work A (A1) moves away from the third transfer means 23, the distance from the next work A (A2) gradually increases, and the next work A (A2) becomes third. When the transfer means 23 is completely transferred, the distance between the workpieces A (A1) and A (A2) adjacent to each other on the third transfer means 23 becomes constant, and the third transfer means 23 causes the work A (A1). , A2) are conveyed.

  The work transfer speed of the third transfer means 23 is slightly higher than the work transfer speed of the second transfer means 22, and the work transfer speed of the first transfer means 21 is the work transfer speed of the second transfer means 22. It is faster and slightly faster than the work transfer speed of the third transfer means 23. That is, the workpiece transfer speed increases in the order of the first transfer unit 21, the third transfer unit 23, and the second transfer unit 22.

And the said 2nd conveyance means 22 and the 3rd conveyance means 23 are arrange | positioned at the wrapping apparatus. That is, a transport path for transporting the workpiece A in the lapping apparatus is formed by a number of transport rollers 2 constituting the second transport means 22 and the third transport means 23.
Further, on the upstream side of the wrapping apparatus 1, that is, on the upstream side of the second conveying means 22, a feeding roller 25 of a feeding device (not shown) for feeding the decorative sheet B is provided. Thus, the decorative sheet B is sent to the vicinity of the upper surface of the workpiece A in a state where the adhesive is applied to the back surface thereof.
Therefore, the plurality of workpieces A transported by the second transport unit 22 and the third transport unit 23 are, as shown in FIG. 4, the top surface, the side surface, and the bottom surface where the transport roller 2 does not contact during transport. In addition, the decorative sheet B is wound around a plurality of workpieces A.

Further, on the downstream side of the third conveying means 23, a detecting means 30 for detecting gaps S between the plurality of works A and A wound around the decorative sheet B conveyed by the third conveying means 23 is provided. Yes.
The detection unit 30 includes a light projecting unit 31a and a light projecting unit 31b arranged at positions sandwiching the third transport unit 23 in a direction intersecting the transport direction of the workpiece A, and a control unit 32 connected thereto. ing.

The light projecting unit 31a emits laser light, and the light receiving unit 31b receives laser light. In FIG. 2, for the sake of illustration, the light projecting unit 31 a and the light receiving unit 31 b are integrally described. (The direction orthogonal to the paper surface in FIG. 1) is arranged opposite to each other, or is arranged opposite to each other with the third conveying means 23 interposed therebetween.
And the laser beam is always projected from the light projection part 31a, and the projected laser beam is conveyed by the 3rd conveyance means 23 between several workpiece | works A and A around which the decorative sheet B was wound. After passing through the gap S of the sheet after passing through the decorative sheet B, the light is received by the light receiving portion 31b, or after passing through the decorative sheet B and reflected by the surface of the workpiece A to receive light. The light is not received by the portion 31b. That is, when the gap S between the workpieces A and A is between the light projecting unit 31a and the light receiving unit 31b, that is, when the laser beam crosses the laser beam, the laser beam is received by the light receiving unit 31b so that the gap S is detected. It has become. Further, when the workpiece A crosses between the light projecting unit 31a and the light receiving unit 31b, the laser beam is not received by the light receiving unit 31b, so that no gap is detected.

Further, on the downstream side of the third conveying means 23, a decorative sheet B is provided behind the light projecting portion 31a and the light receiving portion 31b based on the gap S between the workpieces A and A detected by the detecting means 30. A cutting device 33 for cutting the decorative sheet B located in the gap S between the plurality of wound workpieces A and A is provided.
The cutting device 33 includes a plurality of transport rollers 2 for transporting the workpiece A, and a cutting unit 34 having a cutting blade 34 a provided on the transport roller 2. The cutting unit 34 has a motor 34b for rotating the cutting blade 34a, and an elevating means 34c for moving the cutting blade 34a and the motor 34b up and down.
The control unit 32 is connected to the cutting unit 34.

When the laser light projected from the light projecting unit 31a is received by the light receiving unit 31b through the gap S between the decorative sheet B and the workpieces A and A, the control unit 32 detects this, and this detection information Based on the conveying speed of the third conveying means 23, the cutting blade 34a of the cutting device 33 is controlled so as to cut the decorative sheet B located in the gap S between the workpieces A and A.
That is, first, the control unit 32 detects when the laser light projected from the light projecting unit 31a is received by the light receiving unit 31b through the gap S between the decorative sheet B and the workpieces A and A, The time when the gap S crosses between the light receiving unit 31a and the light projecting unit 31b can be obtained as detection information. Since the distance between the detection position (the position where the laser beam and the gap intersect) and the cutting blade 34a and the work transfer speed of the third transfer means 23 are set in advance, the gap S is set to the detection position. It is possible to calculate the time during which the cutting blade 34a is conveyed to the position. Therefore, the control unit 32 rotates the cutting blade 34a by the motor 34b during this time and lowers the cutting blade 34a by the lifting means 34c, and when the gap S is conveyed directly below the cutting blade 34a. The decorative sheet B located in the gap S can be cut. The cutting blade 34a may be always rotated while the workpiece A is being conveyed.

Next, a method for conveying the workpiece A by the workpiece conveying device 20 having the above-described configuration will be described.
First, as shown in FIG. 1 (a), when a work A1 is introduced into a first transport means 21 from a mold line (not shown) on the upstream side, the work A1 is downstream (right side in FIG. 1) by a transport roller 2. The leading end of the workpiece A1 is transferred to the conveying roller 2 on the upstream side of the second conveying means 22. Then, after the entire workpiece A1 has been transferred to the conveyance roller 2 of the second conveyance unit 22, the workpiece A1 is conveyed toward the downstream side at a workpiece conveyance speed slower than that of the first conveyance unit 21.
The decorative sheet B is fed to the vicinity of the top surface of the tip of the work A1 with the adhesive applied to the back surface thereof by the feed roller 25, and the tip of the decorative sheet B is aligned with the tip of the work A1. In this state, the front end portion of the decorative sheet B is adhered to the upper surface of the front end portion of the work A1.
Further, in the subsequent steps, as described above, the decorative sheet B is wound around the workpiece A that is sequentially conveyed by the wrapping means 1.

Next, as shown in FIG. 1B, when the next workpiece A2 is fed from the molder line to the first conveying means 21, the workpiece A2 is conveyed downstream by the conveying roller 2 of the first conveying means 21. Is done. Since the first conveying means 21 has a work conveying speed faster than the second conveying means 22, the work A 2 is moved when the leading edge of the work A 2 is transferred to the conveying roller 2 on the upstream side of the second conveying means 22. It collides with and contacts the rear end of A1.
Next, as shown in FIG. 1 (c), when the next workpiece A3 is further fed into the first conveying means 21 from the molder line, the tip of the workpiece A3 is upstream of the second conveying means 22. When the transfer roller 2 is transferred, the rear end portion of the workpiece A2 collides with and comes into contact therewith.
Then, the workpieces A1 to A3 are sequentially conveyed by the second conveying means 22 while being in contact with each other.

Next, as shown in FIG. 1 (d), when the next workpiece A 4 is further introduced from the molder line into the first conveying means 21, the tip end of the workpiece A 4 is upstream of the second conveying means 22. When the transfer roller 2 is transferred, the rear end portion of the workpiece A3 collides with and comes into contact therewith.
And the workpiece | work A2-A4 is conveyed sequentially in the state contact | abutted mutually by the 2nd conveyance means 22. FIG.
On the other hand, when the first work A1 is transferred from the second transport means 22 to the third transport means 23, the work transport speed of the third transport means 23 is faster than the work transport speed of the second transport means 22. The workpiece A1 transferred to 23 moves away from the next workpiece A2, that is, the first workpiece A2 conveyed by the second conveying means 22. Further, when the tip end of the work A1 is transferred to the third carrying means 23, the work A1 is slightly separated from the next work A2, and the next work is transferred as the first work A1 is transferred to the third transport means 23. The separation distance from A2 is gradually increased.

Next, as shown in FIG. 1 (e), when the next workpiece A5 is further fed into the first conveying means 21 from the molder line, the tip of the workpiece A5 is upstream of the second conveying means 22. When the transfer roller 2 is transferred, it collides with and comes into contact with the rear end of the workpiece A4.
The workpieces A <b> 3 to A <b> 5 are sequentially conveyed while being in contact with each other by the second conveying means 22.
On the other hand, the first work A1 and the next work A2 are transported by the third transport means 23 when the work A2 is completely transferred to the third transport means 23 and the distance between the works A1 and A2 becomes constant. It will be done.

  Similarly, the workpiece A is sequentially put into the first transport unit 21 and is transported sequentially downstream by the second transport unit 22 and the third transport unit 23. Then, the workpieces A and A that are transported by the third transport means 23 and that are adjacent to each other are transported with a constant interval S therebetween.

Then, the decorative sheet B is wound around the workpiece A that is sequentially conveyed by the wrapping means 1, but the winding of the decorative sheet B is completed before the workpiece A reaches the downstream side of the third conveying means 23. .
As shown in FIG. 2, when the gap S between the workpieces A and A around which the decorative sheet B is wound comes to the downstream side of the third conveying means 23, that is, between the light projecting unit 31a and the light receiving unit 31b, the control unit 32 detects that the laser light projected from the light projecting unit 31a is received by the light receiving unit 31b through the clearance S between the decorative sheet B and the workpieces A and A, thereby causing the gap S to project from the light receiving unit 31a. The time crossing between the optical part 31b is obtained as detection information.
Since the distance between the detection position (the position where the laser beam and the gap S intersect) and the cutting blade 34a and the work transport speed of the third transport means 23 are set in advance and are input to the controller 32. The control unit 32 calculates the time during which the gap S is conveyed from the detection position to the position of the cutting blade 34a. Then, the controller 32 rotates the cutting blade 34a by the motor 34b during this time, and lowers the cutting blade 34a by the elevating means 34c, and when the gap S is conveyed directly below the cutting blade 34a, The decorative sheet B located at S is cut. Similarly, the decorative sheet B positioned in the gap S of the workpieces A and A that are successively conveyed with the gap S is cut by the cutting blade 34a. As a result, the work A is discharged from the cutting device 33 in a state where the decorative sheet is individually wound.

According to the present embodiment, the work conveying speed of the first conveying means 21 is changed from the first conveying means 21 to the second conveying means 22 at the rear end portion of the last work A being conveyed by the second conveying means 22. Since the work transport speed of the second transport means 22 is set so that the tip end of the work A transferred to the contact with each other, the plurality of work A transported by the second transport means 22 continues in the transport direction. And are conveyed in contact with each other.
The work transfer speed of the third transfer means 23 is such that the rear end portion of the work A transferred from the second transfer means 22 to the third transfer means 23 and transferred by the third transfer means 23 is the second transfer means. 22 is set so as to be faster than the workpiece conveying speed of the second conveying means 22 so as to be separated from the tip of the first workpiece A being conveyed by the plurality of workpieces A. Therefore, the plurality of workpieces A conveyed by the third conveying means 23 are conveyed. It is conveyed in a state that is continuous in the direction and separated from each other by a predetermined interval.
Therefore, the workpiece A can be conveyed at a predetermined interval easily and inexpensively.

Moreover, since the 1st conveyance means 21, the 2nd conveyance means 22, and the 3rd conveyance means 23 are comprised by the some conveyance roller 2 of the same diameter rotating while contacting the lower surface of the workpiece | work A, the workpiece | work A is stabilized. The plurality of transport rollers 2 of the first transport unit 21 rotate at a constant rotational speed, and the plurality of transport rollers 2 of the second transport unit 22 are slower than the transport rollers 2 of the first transport unit 21 Since the plurality of transport rollers 2 of the third transport unit 23 rotate at a constant rotational speed and rotate at a constant rotational speed faster than the transport rollers 2 of the second transport unit 22, the first transport unit 21 and the second transport unit The workpiece transfer speed of the means 22 and the third transfer means 23 can be easily set.
Further, the decorative sheet B is wound by the lapping means 1 around the upper surface, the side surface, and the lower surface where the conveying roller 2 does not contact the plurality of workpieces A conveyed by the second conveying means 22 and the third conveying means 23. Since the gap S between the wound workpieces A and A is detected by the detection means 30, and the decorative sheet B located in the gap S between the works A and A detected by the detection means 30 is cut, the decorative sheet A plurality of workpieces A in which B is individually wound can be easily obtained.
Further, when the laser light projected from the light projecting unit 31a is received by the light receiving unit 31b through the gap S between the decorative sheet B and the workpieces A and A, the gap S is detected by detecting this. The time crossing between 31a and the light-receiving part 31b can be obtained as detection information. Since the distance between the detection position and the cutting blade 34a of the cutting device 33 and the work transfer speed of the third transfer means 23 are set in advance, the gap S is transferred from the detection position to the position of the cutting blade 34a. The time to be calculated can be calculated. Therefore, the decorative sheet B positioned in the gap S between the workpieces A and A can be reliably cut by the cutting blade 34a.

  In this embodiment, the case where the workpiece transfer device according to the present invention is applied to a wrapping device has been described as an example. However, this workpiece transfer device is applicable to any device that needs to transfer a workpiece at a predetermined interval. can do.

It is a schematic block diagram which shows an example of the workpiece conveyance apparatus which concerns on this invention with the conveyance process of a workpiece | work. It is a schematic block diagram which shows the cutting device of the lapping apparatus which concerns on this invention. It is a perspective view which shows the principal part of the wrapping apparatus which concerns on this invention. It is process drawing which shows the process of winding a decorative sheet around a workpiece | work with the lapping apparatus which concerns on this invention.

Explanation of symbols

A work B decorative sheet S gap 1 lapping means 2 transport roller 3 pressing roller 20 work transport device 21 first transport means 22 second transport means 23 third transport means 30 detection means 31a light projecting part 31b light receiving part 32 control part 33 cutting Device 34a Cutting blade

Claims (4)

A workpiece transfer device for transferring workpieces at predetermined intervals,
A first conveying means for conveying the workpiece at a constant speed, a second conveying means for conveying the workpiece at a constant speed provided downstream of the first conveying means, and a downstream of the second conveying means. And a third transport means for transporting the workpiece at a constant speed,
The workpiece transfer speed of the first transfer means is such that the tip of the workpiece transferred from the first transfer means to the second transfer means is located at the rear end of the last work being transferred by the second transfer means. It is set to be faster than the workpiece conveying speed of the second conveying means so as to abut.
The work transfer speed of the third transfer means is such that the rear end portion of the work transferred from the second transfer means to the third transfer means and transferred by the third transfer means is transferred by the second transfer means. A workpiece transfer apparatus, wherein the workpiece transfer device is set to be faster than the workpiece transfer speed of the second transfer means so as to be away from the tip of the leading workpiece. In the workpiece conveyance apparatus of Claim 1,
Each of the first transport unit, the second transport unit, and the third transport unit includes a plurality of transport rollers having the same diameter that are arranged at predetermined intervals in the transport direction of the workpiece and rotate while contacting the lower surface of the work. And
The plurality of transport rollers of the first transport means rotate at a constant rotational speed, and the plurality of transport rollers of the second transport means rotate at a constant rotational speed slower than the transport rollers of the first transport means, The plurality of conveying rollers of the three conveying means rotate at a constant rotational speed faster than the conveying rollers of the second conveying means. A wrapping apparatus comprising the workpiece transfer apparatus according to claim 2,
Wrapping means for winding a decorative sheet around the plurality of workpieces on the upper surface and side surfaces of the plurality of workpieces conveyed by the second conveying device and the third conveying device, and the lower surface where the conveying rollers do not contact;
Detecting means for detecting gaps between a plurality of workpieces around which a decorative sheet is wound, conveyed by the third conveying means;
A wrapping apparatus, comprising: a cutting device provided on a downstream side of the third conveying unit and configured to cut a decorative sheet positioned in a gap between workpieces detected by the detection unit. The wrapping apparatus according to claim 3,
The detection unit includes a light projecting unit and a light receiving unit disposed at a position sandwiching the third transport unit in a direction intersecting the transport direction of the workpiece,
When the light projected from the light projecting unit is received by the light receiving unit through the gap between the decorative sheet and the light receiving unit, this is detected, and based on the detection information and the work transport speed of the third transport unit, A wrapping apparatus comprising: a control unit that controls a cutting blade of the cutting apparatus to cut a decorative sheet positioned in a gap between the workpieces.

Images