JP6913948B2 - Tatami cutting machine - Google Patents

Description

The present invention relates to a tatami mat cutting machine. More specifically, the present invention relates to a tatami mat cutting machine that conveys the tatami mat while detecting the troughs of the tatami mats and cuts along or in parallel with the troughs of the tatami mats.

In the tatami mat woven with rush and warp as weft, the woven part woven through the warp and the ear called the whiskers formed by the ends of the rush protruding from both sides of this woven part. It is well known that parts exist. (For example, FIG. 7 of Patent Document 1)

Then, as shown in FIG. 4 of Patent Document 1, a guide device for guiding the tatami mat placed in the receiving basket while restricting the left and right (width direction) positions and centering the tatami mat, and up and down so as to sandwich the tatami mat. A tatami mat feed device composed of a feed roller and a pressing roller, a cutting device provided on the outlet side of the tatami mat feed device, and a guide device and a tatami mat feed device are arranged to cut a whiskers of the tatami mat. A conventional tatami mat cutting device composed of a whisker cutting device including a rotary blade is known.

The rotary blade of the feed roller and the whiskers cutting device is driven by a traction motor, and an encoder that measures the length of the tatami mat to be fed is coupled to the shaft end on one side of the presser roller. The measurement signal is sent to a control device (not shown), and a cutting blade that cuts the tatami mat in the width direction is provided on the outlet side of the feed roller, and this cutting blade moves left and right (on the blade guide rail). It can reciprocate in the width direction) and is driven by a cutting motor. The control device controls to count the measurement signals from the encoder, stop the traction motor when the set length is reached, and start the cutting motor.

In order to solve the above-mentioned problems of the conventional tatami mat cutting machine, in a tatami mat cutting device having a cutting blade attached to a slider and a blade guide rail for traveling the slider in the cutting direction, a horizontal frame arranged in the cutting direction. The applicant has also proposed a tatami mat cutting device (Patent Document 1), which comprises a holding link mechanism including a holding lever provided on the horizontal frame.

Furthermore, a tatami mat consisting of a weft weft, a weaving part woven with warp threads, and a whiskers formed at the ends of the weaving part protruding from both sides of the weaving part is sent in the longitudinal direction and cut at regular length intervals. The tatami mat cutting machine is composed of a core rod, a rotating body fitted in the core rod at intervals, a guide portion protruding in the radial direction from the rotating body, and an introduction portion inclined with respect to the axis. We are also proposing a tatami mat cutting machine (Patent Document 2) characterized by providing a tatami mat guide device for centering a tatami mat composed of a plurality of guide rods.

Furthermore, in a tatami mat cutting machine that transports the tatami mat and cuts it in the width direction of the tatami mat, a sensor that detects the height or depth of the valley of the tatami mat and a sensor that detects the height or depth of the valley of the tatami mat, and left and right in the width direction from the valley of the tatami mat It is equipped with a sensor that detects the height or depth of the slope of the grass at the same distance or almost the same distance from the valley of the eyes, and the height or depth data of the valley of the eyes on the tatami mat and the eyes of the tatami mat. From the height or depth data of the slope of the grass at the right position in the width direction of the valley and the height or depth data of the slope of the grass at the left position in the width direction of the valley of the tatami mat, the tatami table It detects whether or not it is transported along the valley of the eyes or parallel to the valley of the eyes of the tatami mat, and in the transport path of the tatami mat, the lower right correction roller and the upper right correction roller face each other vertically and respectively. The upper and lower rollers are provided at an angle to the transport direction so that the right end side of the upper and lower rollers is located closer to the tatami mat holding means side than the left end side, and the lower left correction roller and the upper left correction roller face each other vertically. Moreover, the left end side of each of the upper and lower rollers is provided at an angle with respect to the transport direction so as to be located closer to the tatami mat holding means side than the right end side, and the tatami mat table is moved to the right side or the left side by detecting the valley of the eyes of the tatami mat table. When it is determined that it is meandering, the upper right correction roller or the upper left correction roller is moved up and down to narrow the tatami mat with the lower right correction roller and the upper right correction roller or the lower left correction roller and the upper left correction roller. We are also proposing a tatami mat cutting machine (Patent Document 3), which is characterized by shifting the tatami mat surface to the side opposite to the meandering direction by holding it.

Japanese Unexamined Patent Publication No. 09-109088 Japanese Unexamined Patent Publication No. 09-109093 JP-A-2017-87360

In the tatami mat cutting machine of Patent Document 1 and Patent Document 2 disclosed above, the guide device for centering the tatami mat (shown in FIG. 4 of Patent Document 1) and the guide rod attached to the rotating body in the guide device are tilted. Both sides of the woven portion of the tatami mat slide along the introduction part and abut against the inside of the guide portion to center the tatami mat, but the configuration is such that the end of the woven tatami mat is guided regardless of the eyes of the tatami mat. Therefore, there is a problem that it cannot be cut along or in parallel with the weave valley of the tatami mat surface due to the variation in the weaving condition of the end portion and the contact degree of the guide device. When cutting the tatami mat, the warp threads of the tatami mat are not tensioned, and the valleys of the tatami mats may meander instead of being conveyed in a straight line. It also had the problem that it could not be cut in parallel along the valley of the texture of the tatami mat.

When manufacturing tatami mats, the edge of the tatami mat is sewn so that the valley of the eyes on the tatami mat is hidden. The tatami mats have a good finish when the tatami mats are sewn together with the valleys of the tatami mats on the tatami mat surface.

Therefore, when cutting the tatami mat with the tatami mat cutting machine, there is a request to cut along the valley of the tatami mat, or to cut in parallel along the valley of the tatami mat.

Then, the applicant has proposed Patent Document 3, and although the tatami mat cutting machine of Patent Document 3 was able to solve a considerable problem, all the tatami mats could be dealt with by the technique of Patent Document 3. However, there were still issues. Specifically, there are many tatami mats that are not rolled into a roll and are folded in a zigzag pattern, and cheap tatami mats. For the tatami mat, which is in a state of being misaligned, it was not possible to cut along the valley of the eyes of the tatami mat, and further improvement was desired.

In order to solve the above problems, the present invention presents a sensor for detecting the height or depth of the valley of the tatami mat, and a tatami mat, in a tatami mat cutting machine that transports the tatami mat and cuts the tatami mat in the width direction. It is equipped with a sensor that detects the height or depth of the slope of the grass at a position equal to or almost equal to the valley of the eyes on the left and right in the width direction from the valley of the tatami mat. Data, height or depth data of the slope of the grass at the right position in the width direction of the eye valley on the tatami mat, and height of the slope of the grass at the left position in the width direction of the valley of the tatami table. Alternatively, from the depth data, it is detected whether or not the product is transported along the valley of the tatami mat or parallel to the valley of the tatami mat, and in the transport path of the tatami mat, the lower right correction roller and the upper right correction roller are used. It is provided at an angle to the transport direction so that it faces vertically and the right end side of each of the upper and lower rollers is located closer to the tatami mat holding means side than the left end side. And are provided at an angle to the transport direction so that the left end side of each of the upper and lower rollers faces each other vertically and is located closer to the tatami mat holding means side than the right end side. The tatami mat is transported from a position away from the tatami mat or in contact with the tatami mat at a position where the tatami mat is transported in the vertical direction on the downstream side of the tatami mat transport path from the upper right correction roller and the lower left correction roller and the upper left correction roller. A tatami mat correction roller that moves across the path is provided, and when it is determined that the tatami mat table is meandering to the right or left side by detecting the valley of the eyes of the tatami mat table, the upper right part correction roller or the upper left part correction roller is used. By raising and lowering, the lower right correction roller and the upper right correction roller or the lower left correction roller and the upper left correction roller hold the tatami mat, and the above movement of the tatami mat correction roller is performed multiple times, which is opposite to the meandering direction. It is characterized by shifting the tatami mat to the side.

Further, each of the above sensors is characterized in that the measurement spots are arranged so as to be offset in the transport direction of the tatami mat so as not to interfere with each other.

In addition, in each of the above sensors, measurement data of a predetermined number of times is acquired during a predetermined time during transportation of the tatami mat, and the average value of the measurement data acquired by each sensor is calculated to be in a state along the valley of the tatami mat. Alternatively, it is characterized in that it detects whether or not the tatami mat is transported parallel to the valley of the eyes of the tatami mat.

Further, the tatami mat correction roller is characterized in that the tatami mat is moved a plurality of times at preset intervals even when it is not determined that the tatami mat is meandering to the right or left side.

According to the present invention, a sensor that detects the height or depth of the eye valley of the tatami mat, and an inclined portion of grass at a position equal to or approximately equal distance from the eye valley to the left and right in the width direction from the eye valley of the tatami mat. It is equipped with a sensor that detects the height or depth, and the height or depth data of the valley of the eyes on the tatami mat and the height or depth of the slope of the grass at the position on the right in the width direction of the valley of the eyes on the tatami mat. It is possible to detect whether or not the tatami mat is being transported along the tatami mat valley from the data and the height or depth data of the slope of the grass at the position on the left in the width direction of the tatami mat valley. In the transport path of the tatami mat, the lower right correction roller and the upper right correction roller face each other vertically, and the right end side of each of the upper and lower rollers is located closer to the tatami mat holding means side than the left end side with respect to the transport direction. The lower left correction roller and the upper left correction roller face each other vertically, and the left end side of each of the upper and lower rollers is located closer to the tatami mat holding means side than the right end side. It is provided at an angle to the above, and when it is determined that the tatami mat is meandering to the right or left by detecting the valley of the eyes on the tatami mat, the upper right correction roller or the upper left correction roller is moved up and down. By holding the tatami mat with the lower right correction roller and the upper right correction roller or the lower left correction roller and the upper left correction roller, and the lower right correction roller and the upper right correction roller and the lower left correction roller and the upper left On the downstream side of the tatami mat transport path from the partial correction roller, the tatami mat correction roller moves across the path where the tatami mat is transported from a position separated from the tatami mat or in contact with the tatami mat at a position where the tatami mat is transported in the vertical direction. By shifting the tatami mat to the opposite side, it is possible to cut along or in parallel with the valley of the tatami mat.

Not only roll-shaped tatami mats, but also tatami mats that are not rolled and folded in a zigzag pattern, and cheap tatami mats are often used. It is possible to cut the tatami mat, which is in a state where the eyes of the tatami mat are misaligned, along or in parallel with the valley of the tatami mat.

It is a front view of the tatami mat cutting machine of this invention. It is a side view of the tatami mat cutting machine of this invention. In FIG. 2, the first sensor, the second sensor, and the third sensor are cut out so as to be visible. (A) is a side view of the tatami mat surface rolled in a roll shape, and (b) is a side view of a state in which the tatami mat surface is not rolled in a roll shape and is folded in a zigzag shape. It is a top view of the tatami mat cutting machine of this invention. It is a figure explaining the detection means of the valley of the eye of a tatami mat. (A) It is a figure explaining the state which irradiated the tatami mat surface with the spot from the detection means of the valley of the eye of the tatami mat surface, and (b) is the figure explaining the weave of the rush on the surface of the tatami mat surface. It is a figure explaining the detection of the valley of the eye of the tatami mat by the 1st sensor, the 2nd sensor, and the 3rd sensor. (A) is a diagram explaining a state in which the spot of the second sensor matches the valley of the eye on the tatami mat, (b) is a diagram explaining a state in which the tatami mat starts to shift to the right, and (c) is (c). A diagram for explaining a state in which the tatami mat table is further shifted to the right from the state of b) and the valley of the eyes of the tatami mat table reaches the spot of the first sensor, and (d) is a state in which the tatami mat table T starts to shift to the left. FIG. 3 (e) is a diagram illustrating a state in which the tatami mat surface is further shifted to the left from the state of (d) and the valley of the eyes of the tatami mat surface reaches the spot 13 of the third sensor.

An embodiment of the tatami mat cutting machine 1 of the present invention will be described with reference to the drawings. FIG. 1 is a front view of the tatami mat cutting machine 1 of the present invention, FIG. 2 is a side view of the tatami mat cutting machine 1 of the present invention, and FIG. 3 is a plan view of the tatami mat cutting machine 1 of the present invention.

The two-dot chain line shown in FIG. 2 is a roll-shaped tatami mat T. FIG. 2A illustrates the installation of the tatami mat T when the tatami mat T is in a roll shape, is set by the core rod 4 on the tatami mat holding means 3 provided on the frame 2, and is shown by a two-dot chain line in FIG. The tatami mat table T is transported along the transport route shown. FIG. 2B illustrates the installation of a tatami mat table T that is not rolled up and is folded in a zigzag pattern.

Reference numeral 5 denotes an upper front cutting blade for cutting the upper front side of the tatami mat table T, and 6 is a lower front cutting blade for cutting the upper front side. The upper front cutting blade 5 is rotationally driven by the motor 5a, and the lower front cutting blade 6 is rotationally driven by the motor 6a. Further, the lower front cutting blade 6 is configured so that the fixed position can be adjusted to the left and right, and the width dimension of the tatami mat table T to be cut can be adjusted. The fixed position is adjusted by a fastening means that can be operated by hand, such as a knob bolt.

Reference numeral 7 is a tatami mat feed roller, and 8 is a tatami mat surface measuring roller. The tatami mat measuring roller 8 is raised and lowered by the cylinder 8a, raised when the tatami mat T is set, and lowered by the cylinder 8a when cutting the tatami mat T, and is between the tatami mat measuring roller 8 and the tatami mat feed roller by its own weight. Hold the tatami mat T tightly. Although not shown on the tatami mat measuring roller 8, the transport length of the tatami mat table T is measured by detecting an encoder or a slit disk with a sensor and detecting the number of slits that have passed through the sensor. Reference numeral 20 denotes a table on which the tatami mat table T is placed, and reference numeral 21 denotes a cutting device that moves and cuts the tatami mat table T in the width direction when the tatami mat table T having a set length is conveyed. Reference numeral 22 denotes a tatami mat presser that descends and presses the tatami mat T when the tatami mat T is cut by the cutting device of 21.

Reference numeral 9 denotes a transport correction mechanism for the tatami mat table T, which corrects the transport of the tatami mat table T in the width direction of the tatami mat table when the tatami mat table T is not conveyed in a straight line with respect to the upper front cutting blade 5. It is a mechanism to do.

The transport correction mechanism 9 is provided with a pair of vertical correction rollers on the left and right sides of the tatami mat cutting machine 1 in the width direction. The position to be provided is the front side of cutting by the upper front cutting blade 5 and the lower front cutting blade 6. On the right side of FIG. 1, a lower right correction roller 9a and an upper right correction roller 9b are arranged, and the upper right correction roller 9b can be raised and lowered by a cylinder 9c. On the left side of FIG. 1, a lower left roller 9d and an upper left correction roller 9e are arranged, and the upper left correction roller 9e can be raised and lowered by a cylinder 9f. The lower right correction roller 9a, the upper right correction roller 9b, the lower left roller 9d, and the upper left correction roller 9e are angled so as to move the tatami mat T outward as shown in FIGS. Is arranged. That is, when the cylinder 9c is operated and the tatami mat T is narrowly held by the lower right correction roller 9a and the upper right correction roller 9b, the tatami mat T is corrected so as to be moved to the right in FIG. 1, and the cylinder 9f is operated. When the tatami mat T is narrowly held by the lower left correction roller 9d and the upper left correction roller 9e, the tatami mat T is corrected so as to be moved to the left in FIG.

Then, the tatami mat correction roller 15 is configured to move beyond the path through which the tatami mat is conveyed from a position away from the tatami mat or a position in contact with the tatami mat in the path in which the tatami mat T is conveyed in the vertical direction. That is, as shown in FIGS. 1 to 3, the tatami mat correction roller 15 is provided in the transport path in the state where the tatami mat table T is conveyed in the vertical direction.

The tatami mat correction roller 15 is provided on the stays 15c and 15c in a state where both ends can be rotated. Needless to say, it is also possible to use a shaft-shaped tatami mat correction shaft that does not rotate. A link portion 15d is provided on the stay 15c on one side, and the other end of the swing link 15d is attached to a cam 15e provided at the tip of the swing motor 15a by a shaft (not shown) to form a link mechanism 15b. The rotation of the dynamic motor 15a causes the stays 15c and 15c to have a turning center by connecting an end portion different from the side provided with the tatami mat correction roller 15 to the shaft portion 16 provided on the frame 2. The shaft portion 16 is pivotally supported by a bearing portion 17 provided on the frame 2 of the tatami mat cutting machine 1 so as to be rotatable.

Reference numeral 10 denotes a means for detecting the valley of the eyes of the tatami mat table T, and as shown in FIG. 4, three non-contact type distance sensors are provided on the tatami mat table T. The three sensors are when viewed from the side, and the measurement spots are schematic representations of the state when viewed from a plane.

As shown in FIG. 5A, in order to detect the valley of the eyes of the tatami mat table T, the spot 11a of the first sensor 11 is the weave of the rush of the tatami mat table T immediately to the right of the valley of the eyes of the tatami mat table T. Is irradiating the part with a steep angle. The spot 12a of the second sensor 12 illuminates the valley of the eye on the tatami mat surface T. The spot 13a of the third sensor 13 irradiates a portion of the tatami mat T on the left side of the valley of the tatami mat table T where the rush is at a steep angle (see FIG. 5B). The distance between the spot 11a and the spot 13a with respect to the spot 12a in the width direction of the tatami mat T is 1 mm.

In order to irradiate the spots 11a, 12a, 13a in the state of FIG. 5, when the first sensor 11 and the third sensor 13 are installed at an angle θ, they irradiate vertically like the second sensor 12. Therefore, the heights of the spots 11a and 13a may be calculated by multiplying the long-distance measurement distances of the first sensor 11 and the third sensor 13 by cosθ. The angles of the first sensor 11 and the third sensor 13 may be different from each other, but the angles are set to be the same so that the spots can be arranged at the same dimensions from the valley of the tatami mat table T. Is desirable. Then, the height data of the tatami mat table T at the position where the spots 11a, 12a, and 13a are irradiated is acquired.

I want to irradiate the spots 11a, 12a, and 13a side by side in the width direction of the tatami mat table T, but if the spots are close to each other, they interfere with each other, and the height of the irradiation position of the spot on the tatami mat table T cannot be detected. Only the distances that are not used are provided with an interval with respect to the transport direction.

This distance is, for example, an interval of about 2 to 4 mm, and since the transport distance of the tatami mat table T can be measured by the tatami mat surface measuring roller 8 described above, the weeds at the height Y1 of the spot 11a detected by the first sensor. Measures the height Y2 of the spot 12a when it is transported to the position of the second sensor 12, and the height of the spot 13a when the grass of the height Y1 is transported to the position of the third sensor 13. Y3 is measured and used as data. By acquiring such data, when the rush of the tatami mat table T has a fold, even if the spot is shifted in the transport direction, the measurement data can be detected with the same rush data. can do.

Further, since the tatami mat T is woven from natural rush or artificial rush, this texture has some variations. In addition, the diameters of artificial rushes are almost even, but in the case of natural rushes, the cross section is circular or elliptical, causing variations.

Therefore, the valleys of the eyes on the tatami mat table T are detected from the measurements of the height data Y1, Y2, and Y3, but the variation of the grass itself and the variation of the weave affect the detection of the valleys of the eyes on the tatami mat table T. You need to avoid it.

Therefore, the size of the spot of the sensor is set to the size of about two rushes (for example, 0.8 to 1.5 mm) in the transport direction of the tatami mat T, and 0 in the width direction of the tatami mat T. It is about 3 to 1 mm. If the size of two rushes is set with respect to the transport direction, the circular unevenness of the rushes will not be measured in detail, and the highest position of the tatami mat T will be measured at the spot. be able to. Of course, a spot having a length of about 5 mm in the transport direction may be used.

Next, the acquisition interval X and the number of acquisitions Z of the height data Y1, Y2, and Y3 are determined, and the average data of the height data Y1, Y2, and Y3 is obtained as YA1, YA2, and YA3. Assuming that the transport speed of the tatami mat T is S, the distance that the tatami mat T moves while acquiring the number of Z pieces can be calculated, and the distance is set to 5 to 10 mm. By averaging the height data Y1, Y2, and Y3 acquired between 5 and 10 mm to obtain YA1, YA2, and YA3, respectively, it is possible to prevent the influence of the variation of rush and the variation of the texture of the tatami mat table T. be.

At this time, due to the variation in the texture of the tatami mat table T, the weave may be in a state where the grass on the left side or the right side of the valley has popped out to the valley part of the tatami mat table T. As for the data Y1, Y2, and Y3 of the part where the grass is protruding to the valley of the eyes of the tatami mat table T, the numerical value of Y1 or Y3 and the numerical value of Y2 are clearly the height from the 20th surface of the table. Is a high numerical value, so that when the average data is obtained, those data Y1, Y2, and Y3 are excluded and averaged, and the average data YA1, YA2, and YA3 are obtained to further improve the accuracy.

The detection of the valley of the eyes of the tatami mat table T using the average data YA1, YA2, and YA3 acquired as described above will be described.

The state shown in FIG. 6A shows a state in which the spot 12a coincides with the valley of the eye on the tatami mat table T. At this time, since the average data YA2 is the minimum value, the tatami mat table T is conveyed in a state where the valleys of the eyes of the tatami mat table T are detected even if the average data YA1 and the average data YA3 are different.

FIG. 6B is a diagram showing a state in which the tatami mat table T has begun to shift to the right. Since the valley of the eyes on the tatami mat table T shifts to the right side of the spot 12a, the average data YA1 at that time becomes smaller than that in FIG. 6A, and YA2 and YA3 become larger. Assuming that the average data is YB1, YB2, and YB3, respectively, so as to be distinguishable from the data in FIG. 6A.
YB1 <YA1, YB2> YA2, YB3> YA3,
And YB3> YB1
It becomes the relationship of. From this data, it can be detected that the tatami mat table T is shifted to the right.

FIG. 6 (c) is a diagram showing a state in which the tatami mat table T is further shifted to the right from the state of FIG. 6 (b) and the valley of the eyes of the tatami mat table T reaches the spot 11a of the first sensor 11. Assuming that the average data are YC1, YC2, and YC3, respectively, so that they can be distinguished from the data of FIGS. 6 (a) and 6 (b),
YC1 <YA1, YC2> YA2, YC3> YA3
And YC3>YC2> YC1
It becomes the relationship of. From this data, it can be detected that the tatami mat table T is shifted to the right. Actually, the spot 11a is lower than the spot 12a before the valley of the eyes of the tatami mat T reaches the spot 11a of the first sensor 11, and the average data YC3>YC2> YC1. It can be detected that the position is further shifted to the right from the position of).

FIG. 6D is a diagram showing a state in which the tatami mat table T has begun to shift to the left. Since the valley of the eyes on the tatami mat table T shifts to the left side of the spot 12a, the average data YA3 at that time becomes smaller than that in FIG. 6A, and YA2 and YA1 become larger. Assuming that the average data is YD1, YD2, and YD3, respectively, so as to be distinguishable from the data in FIG. 6A.
YD1> YA1, YD2> YA2, YD3 <YA1
And YD3 <YD1
It becomes the relationship of. From this data, it can be detected that the tatami mat table T is shifted to the right.

FIG. 6 (e) is a diagram showing a state in which the tatami mat table T is further shifted to the left from the state of FIG. 6 (d) and the valley of the eyes of the tatami mat table T reaches the spot 13a of the third sensor 13. Assuming that the average data is YE1, YE2, and YE3, respectively, so that the data can be distinguished from the data shown in FIGS. 6 (a) and 6 (d).
YE1> YA1, YE2> YA2, YE3 <YA3
And YE3 <YE2 <YE1
It becomes the relationship of. From this data, it can be detected that the tatami mat table T is shifted to the left. Actually, the spot 13a is lower than the spot 12a before the valley of the eyes of the tatami mat T reaches the spot 13a of the third sensor 13, and the average data YE3 <YE2 <YE1. It can be detected that the position is further shifted to the left from the position of).

Next, the operation of the tatami mat cutting machine 1 of the present invention will be described.
If the tatami mat T is set in the tatami mat cutting machine 1 and the tatami mat table T is wound in a roll shape, the tatami mat table T is set in the tatami mat holding means 3 with the core rod 4, and the upper right portion correction roller 9b and the upper left portion are set. Raise the correction roller 9e and the tatami mat measuring roller 8 to rotate the upper front cutting blade 5 and the lower front cutting blade 6 until the tip of the tatami mat T can be pinched by the tatami mat feed roller 7 and the tatami mat measuring roller 8. Send in. When the tatami mat T is not rolled in a roll shape, the tatami mat T is arranged in a folded state as shown in FIG. 2 (b). At this time, the tatami mat table T is set so that the spot 12a matches the valley of the eyes of the tatami mat table T. It is advisable to set the length to be cut in advance and adjust the position of the lower front cutting blade 6 with respect to the upper front cutting blade 5.

When the setting of the tatami mat T is completed, the tatami mat measuring roller 8 is lowered to pinch each of the tatami mats T.

The tatami mat cutting machine 1 starts cutting the tatami mat table T with the operation switch (shown).

At this time, until the cutting is started, the worker aligns the spot 12a with the valley of the eye of the tatami mat T and sets the tatami mat T while checking the spots 11a and 13a. It is also possible to use the values of Y1, Y2, and Y3 as reference values for control.

If the tatami mat T is conveyed straight, the tatami mat T is conveyed and cut in the state shown in FIG. 6A. When the tatami mat T starts to shift to the right as shown in FIG. 6B, the cylinder 9f is operated. Specifically, the rod of the cylinder 9f is extended to lower the upper left correction roller 9e, and the lower left correction roller 9d and the upper left correction roller 9e narrow the tatami mat T so that the tatami mat T moves to the left. do. If it still shifts as shown in FIG. 6 (c), the rod of the cylinder 9f is further stretched to increase the pressure for holding the tatami mat T, so that the tatami mat T is moved to the left. Alternatively, the upper left correction roller 9e is lowered until the state shown in FIG. 6A is detected, the lower left correction roller 9d and the upper left correction roller 9e hold the tatami mat T for a predetermined time, and the upper left correction roller 9e is cylinderd. The operation of ascending by 9f may be repeated so that the tatami mat table T is held a plurality of times to return to the state shown in FIG. 6A.

Further, at the same time when it is detected that the tatami mat T has begun to shift, the swing motor 15a is operated to swing the tatami mat correction roller 15 around the shaft portion 16 by the swing link 15b. Since the tatami mat correction roller 15 swings beyond the path through which the tatami mat table T is transported in the vertical direction, the tatami mat table T is pressed by the tatami mat table correction roller 15 and the transport path is bent in an abbreviated shape. On the downstream side of the tatami mat T pushed by the tatami mat correction roller 15, the tatami mat table T is pulled by the length of the tatami mat table T that has become an abbreviation. Distortion and misalignment of the tatami mat table T are corrected on the downstream side of the tatami mat table T. In particular, when the tatami mat table T is not wound in a roll shape and is in a folded state as shown by the alternate long and short dash line in FIG. 2, the tatami mat table correction roller 15 should always swing. Is preferable. This is because the tatami mat T, which is not rolled into a roll, will inevitably shift when folded. Therefore, in order to correct the slippage, the tatami mat correction roller 15 is placed at a position away from the tatami mat or on the tatami mat. The problem is to forcibly correct the deviation by forcibly moving the tatami mat table T by pulling the tatami mat table by moving it from the contacting position across the path where the tatami mat table is conveyed. Can be solved. When the tatami mat correction roller 15 is separated from the tatami mat table, the transport path of the tatami mat table T is in the vertical direction, and at the position in contact with the tatami mat table, the tatami mat table T is slightly pushed in to slightly omit it from the vertical direction. It is also possible to use a character-shaped transport path. In FIG. 2, the state in which the tatami mat correction roller 15 swings is shown by a solid line, and the state before swinging is shown by a dotted line.

If the transport speed of the tatami mat table T is about 4 to 6 m / min, the tatami mat table correction roller 15 swings about 1 to 2 times / second, and the amount of pushing the tatami mat table T from the vertical direction is 5 to 10 cm. If the amount of swing was set to a certain degree, even the tatami mat T, which was folded and placed with a slight deviation, was corrected and could be conveyed and cut.

On the contrary, when the tatami mat table T starts to shift to the left as shown in FIG. 6D, the cylinder 9c is operated. Specifically, the rod of the cylinder 9c is extended to lower the upper right correction roller 9b, and the lower right correction roller 9a and the upper right correction roller 9b narrow the tatami mat T so that the tatami mat T moves to the right. do. If it still shifts as shown in FIG. 6 (e), the rod of the cylinder 9c is further stretched to increase the pressure for holding the tatami mat T, so that the tatami mat T is moved to the right. Alternatively, the upper right correction roller 9b is lowered until the state shown in FIG. 6A is detected, the lower right correction roller 9a and the upper right correction roller 9b hold the tatami mat T for a predetermined time, and the upper right correction roller 9b is cylinderd. The operation of ascending by 9c may be repeated so that the tatami mat table T is held a plurality of times to return to the state shown in FIG. 6A.

When the valley of the eyes of the tatami mat T deviates from the spot 12a and starts meandering as described above, the upper right correction roller 9b or the upper left correction roller 9e is lowered to narrow the tatami mat T and to the right or left. Meandering is prevented by moving the tatami mat, and the tatami mat T is transported for a set length in a state where the valley of the eye is detected and cut. When the valley of the eyes of the tatami mat T deviates from the spot 12a and starts meandering, the valley of the eyes of the tatami mat T is prevented from meandering, and is parallel to the valley of the eyes of the tatami mat T or parallel to the valley of the eyes of the tatami mat T. Cut into. Although some tension is applied to the tatami mat T during transportation, the tatami mat T is often transported in a bent state without the valleys of the eyes being straight, so the transport of the tatami mat T is corrected to match the bending. By performing this with the transport mechanism 9, it is possible to cut along the valleys of the eyes of the tatami mat T or parallel to the valleys of the eyes of the tatami mat T. By cutting while detecting the valleys of the eyes of the tatami mat T, if the tatami mat floor is tensioned more than the tension at the time of cutting, the warp threads of the tatami mat will also be tensioned, and the eyes of the tatami mat T will also be tensioned. The valleys of the tatami mats are finished with good linearity, and the straightness of the cut portion of the tatami mat table T cut along the valleys of the eyes of the tatami mat table T or parallel to the valleys of the eyes of the tatami mat table T is also good.

Then, even in this situation, as described above, at the same time as detecting that the tatami mat table T has begun to shift, by operating the swing motor 15a, the tatami mat correction roller 15 is shaken by the swing link 15b with the shaft portion 16 as the turning center. Move it. Of course, especially when the tatami mat table T is not wound in a roll shape and is in a folded state as shown by the alternate long and short dash line in FIG. 2, the tatami mat table correction roller 15 always swings. The same is true for keeping it.

Each time the average data YA1, YA2, and YA3 are calculated, the swing actuator calculates which state of FIGS. 6 (a) to 6 (e) above is in the control device (not shown). , The operation of lowering the upper right correction roller 9b or the upper left correction roller 9e is controlled. Therefore, the cylinder 9c and the cylinder 9f employ an actuator having good responsiveness. Further, instead of using a cylinder, a link or a rack and pinion may be used to lower the upper right correction roller 9b or the upper left correction roller 9e with better responsiveness by a motor.

When the set length transfer is completed, the transfer of the tatami mat table T is stopped, the tatami mat table retainer 22 is lowered, and the tatami mat table T is cut in the width direction by the cutting device 21.

In the above, the detection of the valley of the tatami mat T by comparing the average data YA1, YA2, and YA3 has been described, but the calculated values of YA1-YA2 and YA3-YA2, that is, the heights of spots 11a and 12a. Comparing the difference in height with the difference in height between spots 13a and 12a, if there is no difference in height, it is judged that the data can be transported along the valley of the eyes on the tatami mat table T, and "calculated value of YA1-YA2". If it is <calculated value of YA3-YA2], it is judged that the tatami mat is meandering to the right, and if it is the calculated value of "calculated value of YA1-YA2> YA3-YA2", it is judged that the tatami mat is meandering to the left. It may be determined that the swing of the transport correction mechanism 9 is controlled.

Furthermore, the angles of the lower right correction roller 9a and the upper right correction roller 9b, and the lower left roller 9d and the upper left correction roller 9e, which are arranged at an angle so as to move the tatami mat T to the outside, can be adjusted. It may be provided. Needless to say, the angles of the lower right correction roller 9a and the upper right correction roller 9b, and the lower left roller 9d and the upper left correction roller 9e may be oriented so as to move inward instead of outward.

Furthermore, in order to detect the valley of the eyes of the tatami mat table T, the embodiment with three sensors has been described, but one sensor spot is provided between each of the three left and right ends and the center sensor spot. It is also possible to increase the number of sensors and detect them with high accuracy by increasing the number of sensors to five, or to increase the number of spots of the sensors further outside the left and right sensors to increase the number of sensors to five.

In the above, the embodiment in which three sensors are used has been described, but a displacement sensor that detects unevenness in the width direction of the tatami mat table with one sensor may be used, and unevenness in the width direction of the tatami mat table T may be used with one sensor. The technique for detecting the above is equivalent to the technical scope of the present invention.

Further, although the tatami mat correction roller 15 has been described with a swinging configuration, it may be configured so as to move beyond the path through which the tatami mat is conveyed in the vertical direction, and may move in a linear direction or in an oblique direction. Needless to say, it is possible to obtain the same effect as the case of rocking as the movement of.

Further, the machine user selectively controls the operation of the tatami mat correction roller 15 after detecting the deviation of the tatami mat table, the control of always operating the tatami mat table correction roller 15, or the control of not operating the tatami mat table correction roller 15. It is also a preferable embodiment to provide a switch that can be set, or to provide an adjustment switch for the rotation speed of the swing motor so that the number of swings per unit time of the tatami mat correction roller can be adjusted.

1 Tatami table cutting machine 2 Frame 3 Tatami table holding means 4 Core rod 5 Upper front cutting blade 6 Lower front cutting blade 7 Tatami table feed roller 8 Tatami table measuring roller 9 Conveyance correction mechanism 9a Lower right correction roller 9b Right upper correction roller 9c Cylinder 9d Lower left Part correction roller 9e Upper left correction roller 9f Cylinder 10 Detection means 11 First sensor 11a Spot 12 Second sensor 12a Spot 13 Third sensor 13a Spot 15 Tatami table correction roller 15a Swing motor 15b Swing link 15c Stay 15d link Part 15e Cam 16 Shaft 17 Bearing 20 Table 21 Cutting device 22 Tatami table presser

Claims (4)

In a tatami mat cutting machine that transports tatami mats and cuts them in the width direction of the tatami mats.
A sensor that detects the height or depth of the valley of the eyes on the tatami mat,
It is equipped with a sensor that detects the height or depth of the slope of the grass at a position equidistant or almost equidistant from the valley of the eyes to the left and right in the width direction from the valley of the eyes on the tatami mat.
With the height or depth data of the valley of the eyes on the tatami mat
The height or depth data of the slope of the rush at the right position in the width direction of the valley of the eyes on the tatami mat,
From the height or depth data of the slope of the grass at the left position in the width direction of the eye valley of the tatami mat, it can be determined whether it is transported along the eye valley of the tatami mat or parallel to the eye valley of the tatami mat. Detect and
In the transport route of the tatami mat
The lower right correction roller and the upper right correction roller are vertically opposed to each other, and the right end side of each of the upper and lower rollers is located closer to the tatami mat holding means side than the left end side. Be,
The lower left correction roller and the upper left correction roller are vertically opposed to each other, and the left end side of each of the upper and lower rollers is located closer to the tatami mat holding means side than the right end side. Be,
On the downstream side of the tatami mat transport path from the lower right correction roller, the upper right correction roller, the lower left correction roller, and the upper left correction roller, at a position away from the tatami mat or at a position where the tatami mat is conveyed in the vertical direction. A tatami mat correction roller that moves beyond the path through which the tatami mat is transported from the contact position is provided.
When it is determined that the tatami mat is meandering to the right or left by detecting the valley of the eyes on the tatami mat
By raising and lowering the upper right correction roller or the upper left correction roller
The tatami mat is shifted to the opposite side of the meandering direction by holding the tatami mat with the lower right correction roller and upper right correction roller or the lower left correction roller and upper left correction roller and by performing the above movement of the tatami mat correction roller multiple times. A tatami mat cutting machine characterized by this. The tatami mat cutting machine according to claim 1, wherein each of the above sensors is arranged so as to be offset in the transport direction of the tatami mat so that the measurement spots do not interfere with each other. In each of the above sensors, measurement data of a predetermined number of times is acquired during a predetermined time during transportation of the tatami mat, and the average value of the measurement data acquired by each sensor is calculated to be in a state along the valley of the tatami mat or the tatami mat. The tatami mat cutting machine according to any one of claims 1 or 2, wherein it detects whether or not the tatami mat is transported parallel to the valley of the eyes. The first to third aspects of the tatami mat correction roller are characterized in that the tatami mat is moved a plurality of times at preset intervals even when it is not determined that the tatami mat is meandering to the right or left side. The tatami mat cutting machine described in any of.

Images