JP3849904B2 - Tatami flat stitch sewing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tatami flat sew sewing device, and in particular, when performing a flat stab with a flat sew sewing machine, a series of operations until a flat stab is performed after a rough tatami floor is dropped are automatically performed. It is composed.
[0002]
[Prior art]
In the conventional flat stitch sewing apparatus, the flat stitch operation is performed without considering the difference between the original width dimension and the finished width dimension of the tatami floor to be sewn.
[0003]
As shown in FIG. 2, the conventional flat stitch sewing machine 1 that performs a flat stitch operation has many structures that can cut off the tatami floor A only by about two dimensions (about 6 cm) by one sewing and cutting operation. When the finished width dimension is extremely small with respect to the original width dimension of the tatami floor A, a portion to be cut off is large, and the tatami floor A may collide with the flat stab sewing machine 1.
[0004]
In order to avoid such a collision accident, it is necessary to perform a “rough drop operation” in which the tatami floor A is cut in advance to the floor width dimension that enables the flat stitch sewing operation of the flat stitch sewing machine 1. However, when performing this roughing work, there is a great deal of reliance on manpower, and even when the roughing work is performed with a dedicated machine for roughing, it is necessary to perform this roughing work as a separate process, which is troublesome. Increased, overall work efficiency was poor.
[0005]
In addition, it has been confirmed that the finished dimensions are slightly out of order when sewing and cutting tatami floors (rice straw floors, tatami board floors, etc.) made of hard and solid materials with a flat sew sewing device. . This is because the tatami floor is hard,
-The tatami floor cutting blade 13 attached to the flat sewing machine 1 is bent during cutting.
・ Tatami floor A, which should be fixed, moves slightly.
This is because the mechanical load increases, for example, the flat needle sewing machine 1 is lifted.
[0006]
In the flat sew sewing device including the floor pushing member 25 and the width adjusting member 26, the edge of the tatami floor A is pushed by the floor pushing member 25 in the width adjusting operation, and the sewing / cutting position of the tatami floor is determined. be able to.
[0007]
[Problems to be solved by the invention]
However, as shown in FIG. 3, the tatami floor A, which is wider than the tatami floor A, is sewed on the tatami floor A after the previous sewing operation, so that a portion b called “hige” of the tatami mat B is tatami. It protrudes from the floor A. Therefore, when the edge of the lower front tatami floor A is brought closer in the upper front stab operation, the protruding “brow” portion b is pushed, the tatami table b is forcibly bent, There is a risk that the aesthetics of the finish of the tatami will be damaged by distorting the gluteal muscle.
[0008]
Therefore, the “bash” portion b of the tatami mat B is manually cut in advance, but this operation is time-consuming and wasteful. Further, as shown in FIG. 3, as a countermeasure on the apparatus side, the height of the floor pushing member 25 is set so as not to push the “b” portion “b” of the tatami mat B, and the vicinity of the lower surface of the tatami floor A is It was designed to be pushed by the pushing member 25.
[0009]
On the other hand, when the width adjusting member 26 pushes the edge of the upper front tatami floor A that has been cut first for the lower front flat stab operation, the upper front side cut surface is not completely vertical, Since it is cut obliquely, the amount of pushing out the tatami floor A when pushing near the lower surface of the tatami floor A as shown in FIG. 3 and when pushing near the upper surface of the tatami floor A as shown in FIG. Changes slightly.
[0010]
Such a phenomenon becomes more prominent as the thickness of the tatami floor A is thicker, and causes a dimensional error in the finished product. Therefore, when an accurate finished size is desired, the upper surface of the already cut tatami floor A is used. It is desirable to push the neighborhood. However, this is inconsistent with “pushing the lower surface of the tatami floor so as not to push the whiskers” as described above, and this is a problem for improving the dimensional accuracy.
[0011]
[Means for Solving the Problems]
The tatami flat sew sewing device of the present invention includes a tatami sewing table 1 provided with a floor pushing member 25 and a floor ruler 27, and a floor pushing member in a state where the tatami floor A is pressed against the floor ruler 27 by the floor pushing member 25. Measuring means for measuring the floor width of the tatami floor A based on the position of 25, calculating means for calculating the amount by which the tatami floor A should be cut from the measured floor width and preset finishing dimensions, and the calculated cutting Judgment means for judging the necessity and the number of times of rough dropping based on the power amount, and control means for switching between roughing action and flat stab action by the output of the judging means are provided.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described with reference to an example of a tatami stitching device that stabs the upper front side and the lower front side of the tatami floor one by one.
[0014]
As shown in FIG. 1, a tatami flat sew sewing device according to the present invention includes a tatami sewing table 2 on which a tatami is placed, a rail 3 laid in parallel to the tatami sewing table 2, and a rail 3 on the rail 3. A flat bar sewing machine 1 capable of simultaneously carrying out flat cutting and cutting, a floor pushing member 25 and a width adjusting member 26 for pushing the tatami floor A toward the flat bar sewing machine 1, and a reference position for pushing the tatami floor A are determined. It consists of a floor ruler 27.
[0015]
As shown in FIG. 2, the flat needle sewing machine includes a flat needle sewing machine 1 having a rectilinear needle 11, a tatami floor cutting blade 13 that mainly cuts the tatami floor A, and a tatami surface cutting blade 12 that mainly cuts the tatami mat B (FIG. 6). Reference). As the flat sewing machine 1, a known one can be used.
[0016]
The flat needle sewing machine 1, the tatami floor cutting blade 13 and the tatami surface cutting blade 12 are movable in a direction perpendicular to the rail 3, and when the flat needle sewing machine 1 performs flat needle sewing while running, the flat needle sewing machine 1 moves to the flat stab position, and the tatami floor cutting blade 13 and the tatami surface cutting blade 12 move to the cutting position of the tatami floor and the tatami surface.
[0017]
The tatami surface cutting blade 12 is a rotating blade, the tatami floor cutting blade 13 is a blade that reciprocates a certain angle range such as a kitchen knife, and the tatami surface cutting blade 12 moves the tatami surface slightly inside the tatami floor. The tatami floor cutting blade 13 and the cutting position are shifted so as to cut.
[0018]
On the other hand, when the flat bar sewing machine 1 travels to return to the origin, the flat bar sewing machine 1, the tatami floor cutting blade 13, and the tatami surface cutting blade 12 move to a standby position that does not interfere with the traveling.
[0019]
Further, as shown in FIGS. 6 (a) and 6 (b), the rotating tatami surface cutting blade 12 is configured to move to the upper or side retracted position by the arm 14 alone, and in the roughing process. Is saved as shown in FIG.
[0020]
As shown in FIG. 1, the tatami sewing table 2 includes a tatami table 2 on which a tatami to be sewn is placed and a rotating seat 21. The rotating seat 21 is in a state where the shaft 22 is raised. The shaft 22 is configured to be rotatable around the shaft 22, and when the sewing of one side of the tatami is completed, the shaft 22 is raised and the tatami is rotated 180 degrees.
[0021]
The floor ruler 27 maintains the state shown in the figure at the time of positioning the tatami. When the positioning is completed, the floor ruler 27 moves to a standby position inside the tatami sewing table 2 so as not to obstruct the tatami sewing.
[0022]
The operation of each unit such as the tatami sewing table 2 and the flat stitch sewing machine 1 is controlled by a control device (not shown) using a microcomputer. The control device controls the operation of each part according to the size of the tatami mat set by the operator and the material of the tatami floor (rice straw floor, tatami board floor, floor made of polystyrene foam, etc.).
[0023]
The floor pushing member 25 and the width adjusting member 26 perform an operation of pushing the tatami mat placed on the tatami sewing table 2 toward the flat sewing machine 1.
[0024]
A width adjustment reference sensor 23 for determining the reference position of the floor pushing member 25 and the width adjustment member 26 is provided, and a detector such as a width adjustment encoder 24 capable of accurately detecting the amount of movement from the reference position of the width adjustment is attached. Yes. Put the target tatami floor on the tatami sewing table 2 and push it out to the side of the flat sewing machine by shifting the width of the tatami floor. The position of the width adjusting member 26 at that time indicates the original width dimension of the tatami floor A. That is, it is possible to determine the original width dimension of the tatami floor A from the output of the previous width adjusting reference sensor 23 and the count value of the width adjusting encoder 24.
[0025]
Here, the floor width is measured by sandwiching the tatami floor A between the floor pushing member 25 and the floor ruler 27. Instead of the floor ruler 27, a simple ON / OFF sensor, limit switch, photoelectric sensor, etc. It is also possible to detect the edge of the tatami floor on the side corresponding to the floor ruler, and to determine the floor width of the tatami floor from the value of the width adjusting encoder 24 at the moment when the edge of the tatami floor is detected.
[0026]
From the difference between the floor width of the tatami floor A measured in this way and the finished dimensions inputted in advance, it is possible to determine the amount of cutting of how much the tatami floor should be cut off.
[0027]
Here, when the cutting amount that must be cut off is larger than a set numerical value (a numerical value stored in the control software) that is the “rough cutting reference amount”, the flat-tear sewing machine 1 hits the tatami floor. It is determined that there is a fear that roughing action is necessary. Furthermore, because there is a limit to the maximum amount of cutting that can be safely cut off at one time due to the mechanical structure of the flat needle sewing machine 1, a numerical value that is the “maximum amount of rough cutting” (a numerical value stored in the control software) ) Can be used to determine how many roughing operations are required and how much each roughing should be cut off.
[0028]
In this way, the control device determines whether to perform rough dropping operation or to flatten without roughing, and the device can automatically complete the operation from roughing to flattening.
[0029]
In addition, an automatic rough-off function is available as a method for minimizing dimensional errors based on an increase in the mechanical load that occurs when flat-stitching hard material tatami floors (rice straw floors, tatami board floors, etc.). The flat sew sewing machine equipped with a control that minimizes the amount of drop when roughing and the bottom left margin when performing the front flat work for finishing, and keeps the increase in mechanical load low. To do.
[0030]
In other words, if you set the machine to process a hard material tatami floor, set the amount of rough drop corresponding to the material of the tatami floor and the lower left margin, and control the amount of rough cut once. Thus, it is possible to realize the sewing / cutting operation in a state where the mechanical load and the dimensional error are small.
[0031]
On the other hand, when processing a relatively soft tatami floor (such as a floor made of polystyrene foam), the mechanical load is small, so the amount of roughing is increased as much as possible, and as few times as possible. It is controlled so that the tatami can be efficiently finished by dropping.
[0032]
The floor pushing member 25 and the width adjusting member 26 need to be operated by switching between the case where the vicinity of the lower surface of the tatami floor A is pressed and the case where the vicinity of the upper surface is pressed. For this purpose, the floor pushing member 25 is configured to be raised or lowered, and the control device selectively uses the case where the vicinity of the lower surface of the tatami floor A is pressed and the case where the vicinity of the upper surface is pressed as necessary.
[0033]
This raising / lowering can be performed by various raising / lowering means such as raising / lowering by an air cylinder, raising / lowering by a motor, and raising / lowering by a solenoid coil.
[0034]
Since various types of tatami floors with different thicknesses are provided, lifting means are provided on the floor pushing member 25 and the width adjusting member 26, and the tatami floor is pushed according to the case where the upper surface and the lower surface of the tatami floor are pushed. The height of the position can be changed.
[0035]
Next, the operation of manufacturing a tatami by the tatami flat stitch sewing apparatus configured as described above will be described with reference to the flowchart of FIG.
[0036]
(Upper front stab action)
(1) The floor pushing member 25 is raised to a low height at which the vicinity of the lower surface of the tatami floor A can be pushed so as not to push the beard portion b of the tatami mat B (see FIG. 3).
(2) The width-adjusting member 26 is advanced until the edge of the tatami floor A hits the floor ruler 27, and the tatami floor is squeezed between the floor pushing member 25 and the floor ruler 27.
(3) Read the value of the width adjusting encoder in this swallowed state, and determine the original width dimension So of the tatami floor.
(4) The tatami floor is securely fastened to the tatami table 2 and the flat stab sewing machine 1 is operated to cut the tatami floor A and the tatami floor B on the upper side of the tatami and perform flat stab.
(5) After releasing the floor clamp, turn the tatami mat 180 degrees.
[0036]
(Roughing action)
(10) From the difference between the determined original width dimension So of the tatami floor and the finished dimension Sn input and set in advance, it is determined whether or not a roughing operation is necessary.
(11) When it is determined that the roughing operation is necessary, the roughing amount is determined from the original width dimension So, and this roughing amount is converted into the target value of the width-encoder.
(12) The floor pushing member 25 is raised to a height at which the vicinity of the upper surface of the tatami floor can be pushed (see FIG. 4).
(13) Advance the width adjusting member 26 until it reaches the target value of the width adjusting encoder (within the limit that allows roughing once).
(14) After leveling, tighten the tatami floor and perform roughing.
(15) After releasing floor tightening,
(16) Change / update the floor width dimension to the floor width dimension after rough removal and return to step (10).
During this roughing operation, the tatami surface cutting blade 12 is retracted as shown in FIG.
[0037]
(Lower front stab operation)
(20) When it is determined in step (10) that the roughing operation is unnecessary, the target value of the width adjusting encoder corresponding to the amount of width increasing to the finished dimension is calculated,
(21) The floor pushing member 25 is raised to a height at which the vicinity of the upper surface of the tatami floor can be pushed (see FIG. 4).
(22) Advance the width adjusting member 26 until the width adjusting encoder 24 reaches the target value,
(23) After the tatami floor is securely fastened to the tatami table 2, the tatami surface cutting blade 12 is returned to the position shown in FIG. 6 (a), and the stabbed sewing machine 1 is operated to cut the lower front side of the tatami. Perform a flat sting.
(24) After releasing the floor clamp, complete by removing the tatami mat.
Such a series of operations can be automatically performed to finish the tatami mat.
[0038]
The configuration for retracting the tatami surface cutting blade in the embodiment described above is not limited to the device that performs the roughing process, but a tatami stitching device including a flat stitch sewing machine and a reverse stitching sewing machine on a common base, Applying to a tatami stitching device (see, for example, Japanese Patent No. 2742881) equipped with a sewing machine and a reverse stitching machine on separate bases and retracting the tatami mat cutting blade during the reverse stitching process, It can be applied to prevent damage.
[0039]
【The invention's effect】
As is clear from the description based on the above embodiment, according to the tatami flat sew sewing device of the present invention, by inputting and setting the finished size of the tatami mat, the flat stab is passed through the rough fall of the tatami floor. A series of operations until it is performed can be automatically performed.
[Brief description of the drawings]
FIG. 1 is a plan view of a flat sew sewing device according to the present invention;
FIG. 2 is a side view of a flat stitch sewing machine used in the flat stitch sewing apparatus of the present invention;
FIG. 3 is a side view for explaining the operation of the floor pushing member in the apparatus shown in FIG.
4 is a side view for explaining another operation of the floor pushing member in the apparatus shown in FIG.
FIG. 5 is a flowchart for explaining the operation of the flat stitch sewing apparatus according to the present invention;
FIGS. 6A and 6B are side views showing two states of a tatami surface cutting blade provided in a flat needle sewing machine. FIGS.
[Explanation of symbols]
A tatami floor B tatami surface b mustache part 1 flat stitch sewing machine 2 tatami sewing table 3 rail
12 Tatami mat cutting blade
13 Tatami floor cutting blade
21 Rotating seat
22 Shaft
23 Reference sensor
24 Alignment encoder
25 Floor pusher
26 Alignment member
27 Floor ruler

Claims (5)

Tatami sewing table provided with a floor pushing member and a floor ruler, and measuring means for measuring the floor width of the tatami floor based on the position of the floor pushing member in a state where the tatami floor is pressed against the floor ruler by the floor pushing member And a calculating means for calculating the amount of tatami floor to be cut from the measured floor width and preset finish dimensions, and a determining means for determining the necessity and the number of times of roughing based on the calculated amount to be cut And a tatami flat stitch sewing apparatus, comprising: a control unit that switches between a roughing operation and a flat stab operation according to an output of the determination unit. A tatami sewing table provided with an edge detecting means for detecting the edge of the floor pushing member and the tatami floor, and the tatami floor is pushed by the floor pushing member, and the edge on the opposite side of the tatami floor is pushed by the edge detecting means. Measuring means for measuring the floor width of the tatami floor based on the position of the floor pushing member in the detected state, and calculating means for calculating the amount of the tatami floor to be cut from the measured floor width and a preset finish dimension; A judging means for judging the necessity and the number of times of rough dropping based on the calculated amount to be cut, and a control means for switching between the roughing action and the flat-stick action according to the output of the judging means. Tatami flat stitch sewing machine.   The tatami flat stitch sewing apparatus according to claim 1 or 2, further comprising means for setting a correction value of a cutting amount in accordance with a material of a tatami floor to be sewn.   3. The tatami flat stitch sewing apparatus according to claim 1, further comprising means for changing a height of a floor pressing member that presses an edge of the tatami floor. A cutting device consisting of tatami facing the cutting blade for cutting the tatami cutting blade and mainly tatami primarily cut tatami, and means for retracting the該畳table cutting blade from tatami facing cutting position, in the process does not require the cutting of the tatami mat The tatami flat stitch sewing apparatus according to claim 1 or 2, wherein a means for retracting is operated.

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