JPH0648578U - Sewing equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] The left end of the cloth W is sewn in the sewing machine in which the sewing machine 5 is moved from left to right so that the cloth W is set along the cloth placing table 2. This prevents the sewing machine 5 from winding up the fabric W and wrinkling it to the right when starting sewing from the section. [Structure] A pair of left and right cloth clamps 20 and 5 facing the cloth placing table 2 at a predetermined interval in the left-right direction.
0 is provided, and a thread clamp 60 that holds the end portion of the sewing thread T drawn from the sewing machine 5 before sewing is provided further on the left side of the cloth clamp 50 arranged on the left side. Cloth W
If even one needle passes through the left end of the cloth, the cloth W is pulled and held to the thread clamp 60 side through the sewing thread T, and the hooking of the needle is ensured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a sewing device.

[0002]

[Prior art]

 Conventionally, the following sewing devices are known. That is, the cloth placing table provided in the machine frame in the left-right direction, the left and right moving table provided behind the cloth placing table so as to be movable left and right with respect to the machine frame, and the cloth on the left and right moving table. The sewing machine is provided with a sewing machine having a feed direction directed to the left and right and a needle position directed forward. The cloth placing table is provided with a pair of left and right cloth clamps facing each other at a predetermined interval in the left-right direction. Each of these cloth clamps directs the end portion toward the sewing machine side and moves it onto the cloth placing table. It was designed to hold the left and right ends of the cloth to be sewn.

[0003]

[Disadvantages of the prior art]

 The conventional sewing machine has the following drawbacks. That is, the cloth placing table and the left and right cloth clamps should be at least in front of the area where the needle position of the sewing machine moves in the left and right direction (from the sewing machine to the front side) in order to avoid collision interference with the sewing machine that moves in the left and right directions. It is provided at a position displaced in the direction of leaving). That is, at the end of the cloth to be sewn facing the sewing machine, the line in the left-right direction in which the sewing is performed is projected to the rear side (sewing machine side) of the holding positions of the cloth placing table and the left and right cloth clamps. It was a free end with no posture maintained in the front / rear / left / right and up / down directions. Therefore, when the sewing machine moves from the left side to the right side of the cloth to be sewn and tries to start sewing from the left end of the cloth to be sewn (hooking the needle), the cloth to be sewn up is rolled up and wrinkled to the right. There was a risk that such a problem would occur.

[0004]

[Means for eliminating the above drawbacks]

 This invention adopts the following means in order to solve the above-mentioned drawbacks. That is, the cloth placing table is provided with a pair of right and left cloth clamps for holding the left and right ends of the cloth to be sewn, and the left and right moving bases are moved to the left side position where the sewing machine starts moving relative to the machine frame from the sewing machine. A thread clamp for holding at least one of the drawn out upper thread end and the lower thread end is provided.

[0005]

[Function of the device]

 This device has the following actions. For the cloth to be sewn which is placed on the cloth placing table and whose left and right ends are held by the left and right cloth clamps, at least one of the upper thread or the lower thread is sewn from the sewing machine waiting on the left side of the rear part. Pull out and hold the ends of these threads in the thread clamp located further to the left than the standby position of the sewing machine. This allows the thread to be tensioned between the thread clamp and the sewing machine in a tensioned state. If the sewing machine starts sewing from the left end of the cloth to be sewn while moving the left and right moving table to the right in this state, the sewing cloth will be sewn together with the thread when the needle is passed through the cloth even once. It will be pulled to the clamp side. That is, the cloth to be sewn is in a state in which the left and right lines to be sewn are pulled and held to the left by the thread clamp via the thread.

[0006]

【Example】

 The present invention will be described below based on an embodiment shown in the drawings. In this specification, the front means the lower side of FIG. 1, the rear means the upper side of FIG. 1, the left means the left side of FIG. 1, and the right means the right side of FIG. As shown in FIG. 1, a cloth placing table 2 provided in the machine frame 1 in the left-right direction, a left and right moving table 3 provided behind the cloth placing table 2 so as to be movable left and right, and a left and right moving table 3 A front and rear movable table 4 provided on the upper and lower sides, a sewing machine 5 provided on the front and rear movable table 4, and a cloth to be sewn provided in front of the cloth placing table 2 so as to be movable back and forth. It has a holding table 7 for mounting. The cloth placing table 2 is provided with a pair of right and left cloth clamps 20 and 50, and a thread clamp 60 (see FIG. 6) described later is provided in the vicinity of the left cloth clamp 50. There is.

As shown in FIG. 2, the sewing machine 5 (showing a lock sewing machine) is arranged so that the cloth feeding direction is directed to the left and right, and the needle 6 is directed forward. The left and right moving base 3 is mounted on a pair of front and rear guide rails 10 provided in the machine frame 1 which are long in the left and right direction, and a power unit 12 such as a motor provided on the lower surface of the left and right moving base 3 and the machine frame 1 are mounted. By engaging with a rack 13 provided on the side, which is long in the left-right direction, the rack 13 is moved in the left-right direction parallel to the cloth placing table 2. Further, the front-rear moving table 4 is mounted on a pair of left and right guide rails 11 which are provided on the left-right moving table 3 and is long in the front-rear direction, and a forward / backward drive tool 14 such as a rodless cylinder provided on the left-right moving table 3 is installed. It is designed to move in the front-back direction. At the stage before sewing (hereinafter, referred to as "standby state"), the sewing machine 5 moves to the left side of the cloth placing table 2 (close to the cloth clamp 50 on the left side, which will be described later), and moves to the cloth placing table 2. Positioning is performed by the left and right moving table 3 and the front and rear moving table 4 so that the needle positions are close to each other.

As shown in FIG. 3 to FIG. 5, the cloth clamp 20 arranged on the right side is a base board fitted on the cloth placing table 2 along a positioning rail 21 which is long in the left-right direction and is positionally changeable. 22, a stop mechanism 23 that can hold the position of the base substrate 22 in an immovable state, a movable substrate 24 that is held on the left side of the base substrate 22 so as to be able to move back and forth in the left-right direction, and this movable substrate. It has a pressing plate 25 for the cloth W to be oscillated vertically on the 24, and a hook mechanism 26 capable of holding the upper and lower positions of the pressing plate 25.

The stopper mechanism 23 is located in front of the base board 22 so as to face the guide piece 33 (see FIG. 5) provided on the lower surface of the rear portion of the base board 22 from the guide piece 33 via the positioning rail 21. It has a horizontally rotatable eccentric cam 30 provided on the lower surface of the part, and an operation lever 31 provided on the eccentric cam 30 so as to project to the front left side of the base substrate 22. When the hand is separated from the operation lever 31, the positioning rail 21 is in close contact with the guide piece 33, and the eccentric cam 30 is pressed against the opposite side of the positioning rail 21 by the ridge 32. However, when the operation lever 31 is pushed rearward (on the side of the base board 22), the eccentric cam 30 separates from the positioning rail 21 and the base board 22 (as the cloth clamp 20 as a whole) can be moved left and right. It is a thing.

On the lower surface of the movable substrate 24, guide pieces 34 having the same shape as the above-mentioned guide pieces 33 are provided so as to face each other in the front-rear direction, and these guide pieces 34 hold the positioning rail 21 from both front and rear sides. The movable substrate 24 is guided to move left and right. The movable substrate 24 is always attracted to the base substrate 22 side by a pair of front and rear springs 37 facing left and right. Reference numeral 35 is an advancement limiting rod fixed to the movable substrate 24 side, and 36 is a guide sleeve fixed to the base substrate 22 side.

The hook mechanism 26 includes a support base 40 provided on the movable substrate 24, a hook arm 41 swingably held by the support base 40, and a claw attached to the upper surface of the pressing plate 25. It has a piece 44 and a spring 45 connecting the pressing plate 25 and the hook arm 41 in the pulling direction. The hook arm 41 is formed with two upper and lower inner hook portions 42 and 43 that can be engaged with the claw pieces 44. Therefore, when the tip of the pressing plate 25 is pushed downward, the claw piece 44 disengages from the upper inner hook portion 42 and moves downward to engage with the lower inner hook portion 43 at this point. When the pressing of the pressing plate 25 is stopped, the engaged state with the inner hook portion 43 is maintained. At this time, the cloth W to be sewn can be clamped between the pressing plate 25 and the movable substrate 24. On the other hand, when the upper end of the hook arm 41 is pushed to the right in this state and rocked, the claw piece 44 is disengaged from the lower inner hook portion 43, and the claw piece 44 is pulled up by the spring 45 and the upper inner hook portion 43 is pulled up. It comes to engage with the portion 42. At this time, if the pushing of the hook arm 41 is stopped, the engagement state with the inner hook portion 42 is maintained. At this time, the pressing plate 25 is released, and the cloth W to be sewn (or the cloth already sewn) can be attached and detached. Incidentally, 46 is a hitting lever 46 (the action of which will be described later) used when pushing the hook arm 41 to the right.

As shown in FIGS. 6 and 7, the cloth clamp 50 arranged on the left side is provided with a fluid pressure provided on a substrate 51 fixed on the cloth placing table 2 so as to be swingable through a bracket 52. It has an advancing / retreating driving tool 53 such as a cylinder or a solenoid, and a pressing plate 55 which is swingably held on the substrate 51 and rotatably connected to an advancing / retreating end portion 54 of the advancing / retreating tool 53. With the operation of the advancing / retreating drive tool 53, the cloth W to be sewn is clamped between the pressing plate 55 and the substrate 51, or the pressing plate 55 is released so that the cloth W to be sewn (or the cloth sewn) is Putting on and taking off. In the standby state described above, the sewing machine 5 is stopped so that the needle position is on the left side of the position where the pressing plate 55 and the substrate 51 clamp the cloth W to be sewn.

As shown in FIG. 6, FIG. 8 and FIG. 9, the thread clamp 60 is on the left side of the cloth clamp 50 on the cloth placing table 2 and is in the standby state (the thread to be described later). It is provided at a position further left than the cutting device 80) and has a backing plate 67 attached to the lower surface of the cloth placing table 2 and a long hole 62 that is long in the left-right direction. A sliding board 61 which is movably held along the lower surface of the backing plate 67 by a suspension pin 66 which is fixed to the backing plate 67 from below so as to penetrate, and a right end portion of the sliding board 61. A clamp arm 63 bent upward of the cloth placing table 2, a clamp piece 64 attached to the tip end of the clamp arm 63, and the sliding base plate 61 are pulled leftward. Has a spring 65 and . The tip end of the clamp arm 63 and the clamp piece 64 are formed into a Y-shaped side surface, and the end of the thread T drawn from the sewing machine 5 can be bitten and held between them. Has become. Further, by the biasing force of the spring 65, tension can be applied to the held thread T with the sewing machine 5.

As shown in FIG. 11, the holding table 7 is held on three legs 70 (see FIG. 1) projecting to the front of the machine frame 1 so as to be swingable back and forth. -Shaped supporting frames 71, a cloth receiving plate 72 which is long in the left-right direction and has an L-shaped cross section, which is bridged between the upper ends of the supporting frames 71, and the central arrangement of the supporting frames 71. And an advancing / retreating drive tool 73 such as a fluid pressure cylinder having an advancing / retreating end 74 rotatably connected to the support frame 71. ing. With the operation of the advancing / retreating drive tool 73, the holding table 7 swings back and forth so as to move toward and away from the front end 2a of the cloth placing table 2. The upper end of the leg portion 70 abuts on the lower end surface of the support frame 71 when the holding base 7 swings forward (away from the front end 2a of the cloth placing table 2) to limit its movement. There is provided a stopper piece 75 for contacting the front surface of the machine frame 1 on the rear surface of the support frame 71 when the holding table 7 swings backward (close to the front end 2a of the cloth placing table 2). And a stopper rod 76 (see FIG. 10) for restricting its movement is provided. Reference numeral 77 is a safety chain connecting the holding table 7 and the machine casing 1. Between the holding table 7 and the machine frame 1, there are provided three cloth container 79 (see FIG. 1) having an L-shaped cross section that is long in the left-right direction, and accommodates the cloth that has been sewn. Used in some cases (details will be described later).

As shown in FIGS. 6, 12 and 13, a thread cutting device 80 is provided on the left side of the sewing machine 5 so as to be close to the rear end of the cloth placing table 2. The thread cutting device 80 includes a rotary driving tool 81 such as a motor or a rotary solenoid, and a swinging mechanism provided with a notch 83 which is provided on a rotary shaft of the rotary driving tool 81 so as to be swingable back and forth and opened to the left and right. A movable blade 85 having a link 82, a driven pin 84 which is swingably held in the front-rear direction and which is fitted into a notch 83 of the swing link 82, and at least one position is always brought into contact with the movable blade 85. Thus, the fixed blade 86 is held horizontally in the front-rear direction. 87 is a safety cover. The movable blade 85 shown by the chain double-dashed line in FIG. 13 is for explaining the state in the middle of swinging.

[0016]

[Operation of the embodiment]

 Next, the operation of the embodiment apparatus will be described. In this embodiment, a case will be described in which two cloths W to be sewn having the same size and the same shape are overlapped with each other and their ends are sewn together. As shown in FIG. 14 (a), first, a large number of cloths W to be sewn are piled up and the whole is folded in two so that the creases are aligned in the left-right direction. When using cloth W to be sewn that has different front and back sides, superimpose them so that the side facing up and the side facing up alternate. Then, it is placed on the holding table 7 with the fold side facing the cloth placing table 2.

Next, as shown in FIG. 14B, the holding table 7 is reciprocally rocked in a direction of approaching the cloth placing table 2 by operating a switch or the like, and this state is maintained. Then, the uppermost two cloths W to be sewn on the holding table 7 are developed toward the cloth placing table 2 side.

As shown in FIG. 15, the cloth clamp 20 arranged on the right side has its position adjusted according to the lateral dimension of the cloth W to be sewn. In this case, the actual left and right of the cloth W to be sewn is adjusted. The distance from the cloth clamp 50 arranged on the left side to the cloth clamp 20 arranged on the right side (between the clamp positions) is adjusted to be slightly wider than the directional dimension. Then, the right corner of the cloth W to be sewn is clamped to the cloth clamp 20 arranged on the right side first, and then the opposite left corner is pulled leftward to reach the cloth clamp 50 arranged on the left side. Then, the cloth clamp 50 is used to perform clamping. By doing so, the cloth clamp 20 arranged on the right side allows the movable board 24 to be pulled from the base board 22 to the left side against the spring force, as is apparent from FIGS. The cloth W can be held taut in the left-right direction. Set the cloth W to be sewn further to the sewing machine 5 side with respect to the cloth clamps 20 and 50 and the cloth placing table 2 so that the rear end thereof reaches the needle position of the sewing machine 5 (see FIG. 2). .

Next, the sewing machine 5 is started by moving the sewing machine 5 to the right by operating the left and right moving table 3 in the standby state (see FIG. 1). The left end of the cloth W to be sewn is sewn. 16 and 17, in order to prevent the sewing machine 5 from winding up the left end portion of the sewn cloth W and wrinkling it to the right at the time when the sewing machine 5 starts, The upper thread t1 and the lower thread t2 are pulled out (only one of them may be twisted), and the thread T in this state is held by the thread clamp 60 (see FIGS. 8 and 9). . The upper thread t1 and the lower thread t2 are twisted together by the sewing machine 5 after each sewing operation is completed, as described later. As a result, the thread T is stretched between the thread clamp 60 and the sewing machine 5 with tension. When the cloth retainer 90 is lowered in this state and sewing is started, the sewing cloth W is pulled to the left by the thread clamp 60 together with the thread T when the needle 6 is passed through the sewing cloth W even once. Therefore, the cloth W to be sewn is not wound around the sewing machine 5 thereafter.

As shown in FIGS. 18 and 19, even after the right end portion of the cloth W to be sewn is sewn, the left and right moving base is moved until the thread trimming device 80 passes the right end portion of the cloth W to be sewn. Continue moving the sewing machine 5 to the right and idle running the sewing machine 5 according to step 3 (see FIG. 1). After that, when a detection signal from a sensor (not shown) for detecting the position of the sewing machine 5 or the like is transmitted, each of these operations is stopped and the thread cutting device 80 is operated to cut the thread T. At this time, the extra length portion, in which the upper thread t1 and the lower thread t2 (see FIG. 17) are twisted, corresponding to the length S from the needle position of the sewing machine 5 to the thread cutting device 80, is pulled out. The extra length is used to hold the thread clamp 60 at the next sewing.

When the thread trimming device 80 is activated or after the activation, the cloth retainer 90 is manually or automatically raised. Next, when the left and right moving table 3 is moved slightly further to the right, the protrusion (not shown) provided from the proper position such as the thread trimming device 80 or the sewing machine 5 toward the cloth placing table 2 is placed on the right side. The hit lever 46 (see FIG. 3) of the cloth clamp 20 is kicked to the right to release the cloth clamp 20. Therefore, the right and left moving bases 3 (referred to below in FIG. 1) are stopped from moving to the right, and then the front and rear moving bases 4 are moved backward, the left and right moving bases 3 are moved leftward, and the front and rear moving bases 4 are moved forward. The sewing machine 5 is stopped at a position close to the cloth clamp 50 arranged on the left side (the standby state described above).

During the above operation, the cloth clamp 50 on the left side is also released by operating a switch or the like, and as shown in FIG. 20, the holding base 7 is swung forward in a direction of separating from the cloth placing table 2. As a result, the sewn cloth is pulled down from the cloth placing table 2 and hung in the cloth container 79 on the front surface of the machine frame 1.

The holding table 7 is retreated and swung in the direction of approaching the cloth placing table 2 again, and the extra length portion of the yarn T pulled out from the sewing machine 5 (the upper yarn t1 and the lower yarn t2 are twisted together) Is held by the thread clamp 60 and the next sewing operation is performed.

In the present invention, the thread clamp 60 (see FIG. 6) is not limited to the linear sliding structure in the left-right direction as described above, and projects toward the rear portion of the cloth placing table 2, for example. A structure in which a clamp arm 63 and a clamp piece 64 are provided at the projecting end of an arm that can be horizontally swung in the left-right direction (it is necessary to pull and urge the middle part of the arm to the left with a spring or the like). Can also be

[0025]

[Effect of device]

 The present invention has the following effects due to the above-described configuration. With respect to the cloth to be sewn held by the left and right cloth clamps, the thread clamp arranged on the left side of the cloth holds one end of either the upper thread or the lower thread of the sewing machine. At the time of starting sewing from the left end of the sewing cloth to the right side, if even one needle passes through the left end of the cloth to be sewn, the cloth to be sewn is pulled and held to the thread clamp side through the upper thread or the lower thread. Like Therefore, the problem that the sewing machine rolls up the cloth to be sewn to the right does not occur.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged view taken along the line BB of FIG.

FIG. 4 is a view taken along line CC of FIG.

5 is a cross-sectional view taken along line DD of FIG.

FIG. 6 is an enlarged view of a portion E in FIG.

FIG. 7 is an enlarged view taken along line FF of FIG.

FIG. 8 is an enlarged cross-sectional view taken along line GG of FIG.

9 is an enlarged view taken along the line HH of FIG.

10 is an enlarged cross-sectional view taken along line KK of FIG.

11 is an enlarged cross-sectional view taken along line JJ of FIG.

FIG. 12 is an enlarged view of part L of FIG.

13 is a sectional view taken along line MM in FIG.

FIG. 14 is a side view showing how the cloth to be sewn is set on the holding table.

FIG. 15 is a plan view showing how the cloth to be sewn is set on the cloth placing table.

16 is an enlarged cross-sectional view taken along the line NN of FIG.

FIG. 17 is an enlarged view of an essential part showing a sewing preparation state of the sewing machine.

FIG. 18 is a plan view showing a situation after sewing.

19 is an enlarged cross-sectional view taken along line OO of FIG.

FIG. 20 is a side view showing an operation state of the holding table after sewing.

[Explanation of symbols]

 1 Machine frame 2 Cloth placing table 3 Left and right moving table 5 Sewing machine 6 Needle 7 Holding table 20 Cloth clamp (right) 50 Cloth clamp (left) 60 Thread clamp

Claims (1)

[Scope of utility model registration request] 1. A cloth placing table provided in a machine frame that is long in the left-right direction, a left and right moving table provided behind the cloth placing table so as to be movable left and right with respect to the machine frame, and the left and right moving table. In a sewing machine having a sewing machine provided with the cloth feeding direction directed to the left and right and the needle position facing forward, a pair of left and right holding the right and left ends of the cloth to be sewn on the cloth placing table. The cloth clamp is provided, and at least one of the end portion of the upper thread and the end portion of the lower thread pulled out from the sewing machine is held at the left side position where the left and right moving base starts to move with respect to the machine frame. A sewing device equipped with a thread clamp.