KR101922090B1 - Ahpparatus for manunfacturing sheet cover and method thereof and thereby sheet cover - Google Patents

Abstract

The present invention relates to an apparatus to manufacture a seat cover, which easily attaches a thread twisted and supplied on a surface of a seat made of non-woven fabric, such that the seat cover is easily attached to Velcro tape of a chair, a seat cover manufacturing method using the same, and a seat cover manufactured thereby. According to the present invention, the apparatus to manufacture a seat cover comprises: a shelf having a plurality of rotary rollers and a fixing bar, which have a bar shape, arranged at a plurality of preset portions through a fixing means, and guiding non-woven fabric in an installation direction of the rotary roller; a thread supply unit installed on an upper part of the shelf and transferring the thread wound on the outside of a cylindrical roller in the direction of the non-woven fabric guided through the shelf; a plurality of guide plates installed on the fixing bar disposed between the thread supply unit and the non-woven fabric by being spaced apart at an interval, guiding and twisting the thread transferred from the thread supply unit, and guiding the twisted thread to a position on a surface of the non-woven fabric to be thermally bonded; and a thermal bonding unit disposed between the guide plate and the non-woven fabric to receive the twisted thread through the guide plate, place the thread on the surface of the non-woven fabric, and thermally bonding the thread.

Description

TECHNICAL FIELD [0001] The present invention relates to a seat cover manufacturing apparatus, a seat cover manufacturing method using the same and a seat cover manufactured by the method.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet cover manufacturing apparatus, a sheet cover manufacturing method using the same, and a seat cover manufactured by the above method. More specifically, A cover manufacturing apparatus, a method of manufacturing a seat cover using the same, and a seat cover manufactured by the method.

The seat cover refers to a cloth or nonwoven cover that can be put on the surface of a chair to prevent the surface of a chair used in a vehicle or a home from being dirty.

For example, conventionally, as in the document (1), a seat cover having a shape capable of wrapping the backrest and the neck support of a chair so as to flexibly correspond to the size and shape of the chair has been proposed.

The seat cover as in the document (1) is formed in a form that can be wrapped around the backrest and the neck support of the chair so as to cover the chair as a whole so as to prevent the surface of the chair from being dirty. There is a usability problem which can be applied only to a chair used as a chair.

Accordingly, there is a problem that it is difficult to apply a seat cover as in the document (1) to a chair installed in a driving means used by a large number of unspecified persons such as a sightseeing bus or a train. In order to solve such a problem, A seat cover which can be attached to a chair installed in a public transportation has been proposed.

The present invention proposes a seat cover in the form of a wrapping around a neck base of a chair to prevent contamination of waste materials such as sweat and sebum secreted from the head of a person in the neck base of the chair, Shaped seat covers have been produced and supplied.

However, as in the reference (2), conventional seat covers used for attaching to the neckrest of a chair are mostly used as one-time ones, and they are generally made of nonwoven fabrics that can be easily attached to chairs, The surface of the nonwoven fabric constituting the seat cover is soft, so that it is difficult to easily attach the seat cover to the seat, and even when the seat cover is attached to the seat, There has been a problem in that the joining of the chair and the seat cover can be easily separated according to the movement and in order to form a separate joining portion which can be easily attached to the chuck of the chair on the surface of the seat cover The formation process thereof is not easily performed, or the manufacturing process is complicated There is a problem that the unnecessary manufacturing cost is increased, and the cost of the seat cover is increased.

(1) Korean Registration Registration No. 20-0263284 (2002.01.23) (2) Korean Register of Practical Registration No. 20-0410736 (Mar. 2, 2006)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is as follows.

First, a thread capable of improving the adhesive force is formed on the surface of the sheet cover formed of a nonwoven fabric so as to be twisted so as to be easily joined.

Second, it is possible to easily join the yarn to the selected position of the seat cover in the process of joining the seat cover and the yarn through the fusing roller.

Third, through the structure of the guide plate, the yarn transferred from the yarn supply unit can be guided to maintain the tension in the direction of the nonwoven fabric, so that the process of joining the yarn to the surface of the nonwoven fabric can be easily and stably performed.

Fourth, since the process of joining the yarn to the surface of the nonwoven fabric is stably performed, the entire work process for manufacturing the seat cover is simplified to prevent unnecessary work time and work cost from being increased, thereby reducing the cost of manufacturing the seat cover .

To achieve the above object, according to the present invention, there is provided a lathe comprising: a plurality of rotary rollers having a bar shape and arranged in a plurality of predetermined positions by fixing means, the nonwoven fabric being guided along the installation direction of the rotary rollers; A yarn feeder installed at an upper portion of the shelf and configured to transmit a yarn wound around a cylindrical roller in a direction of a nonwoven fabric guided through the shelf; A guide plate guiding the yarn conveyed from the yarn supply unit to be twisted and guiding the twisted yarn to a surface position of the nonwoven fabric to be thermally fused; And a fused portion positioned between the guide plate and the nonwoven fabric and receiving the twisted yarn through the guide plate to be positioned on the surface of the nonwoven fabric and thermally fused.

At this time, the guide plate is connected to enclose the fixed bar, and a fixture in which a plurality of nut holes are formed in the other end surface of the connected part, and a quadrangular plate shape that can be discharged from the lower end, And a fixing plate having a plurality of fastening holes corresponding to the nut holes along the longitudinal direction and having a plurality of discharge holes through which the thread can be discharged at the lower end.

In addition, the guide plate may include a fixture having a plurality of nut holes formed in the other end surface of the connection portion to surround the fixing bar, and a quadrilateral plate shape that surrounds the outer portion of the thread transferred from the thread supply portion, And a coupling plate having a plurality of coupling holes corresponding to the nut holes is installed to be moved in accordance with the adjustment of the coupling bolts coupled to the guide holes, And a plurality of discharge holes that can be formed in the discharge space.

The fixing plate may further include a connection shaft having a surface surrounded by urethane, and the connection shaft may further include a guide roller that is closely contacted and guided by the seal delivery unit.

The fused portion may include a plurality of locking protrusions provided on the lathe, a plurality of locking protrusions provided on the rotation bar and receiving a thread transmitted from the guide plate along the outer periphery thereof, And a fusing roller for guiding the yarn to the surface of the nonwoven fabric and thermally fusing the yarn.

In addition, a guide plate for regulating the tension of the yarn in accordance with a change in the installed position is formed between the yarn supply unit and the guide plate, in which a through hole is formed through which the yarn guided from the yarn supply unit passes, Can be installed and configured.

According to another aspect of the present invention, there is provided a sheet cover comprising a shelf, a guide plate for guiding the thread of the thread feeder to the surface of the nonwoven fabric moved through the shelf, and a fused portion for thermally fusing the thread, A joining preparation step of wrapping the yarn of the yarn supply unit around the outer side of the guide plate and discharging the yarn to the lower end so that the yarn of the yarn supply unit is twisted and connected to the fusing roller of the fusion unit; A joining position adjustment step of finely adjusting an installation position of a guide plate guided by the yarn so that the yarn connected to the fusing roller is in a position to be joined with the nonwoven fabric; A bonding position bonding step of conveying the nonwoven fabric using a rotating roller provided on the upper side of the shelf and rotating the fusing roller of the fused portion corresponding to the rotation of the rotating roller so that the yarn is brought into close contact with a selected position of the nonwoven fabric; A thermal fusion step of bonding the yarn to the surface of the nonwoven fabric through the low frequency vibration of the fusing roller after confirming the state of contact between the nonwoven fabric and the yarn through the bonding position contact step; And a cutting step of cutting the nonwoven fabric bonded to the surface of the yarn according to the selected length through the thermal fusion step.

At this time, a sheet cover manufactured through the above-described method can be obtained.

The present invention as described above can achieve the following effects.

First, a yarn that can improve the adhesive strength on the surface of the sheet cover formed of a nonwoven fabric is twisted and can be easily joined.

Secondly, in the process of joining the seat cover and the seal through the fusing roller, the joining of the seal to the selected position of the seat cover can be facilitated.

Third, the process of bonding the yarn to the surface of the nonwoven fabric can be easily and stably performed by allowing the yarn transferred from the yarn supply unit to be guided in the direction of the nonwoven fabric while maintaining the tension through the configuration of the guide plate.

Fourth, since the process of joining the yarn to the surface of the nonwoven fabric is stably performed, the entire work process for manufacturing the seat cover is simplified to prevent unnecessary work time and work costs from being increased, thereby reducing the cost of manufacturing the seat cover.

1 is a schematic view showing a seat cover manufacturing apparatus of the present invention.
2 is a schematic view showing the configuration of a guide plate and a heat-sealed portion of a seat cover manufacturing apparatus according to the present invention.
Fig. 3 is an enlarged view of the main part of Fig. 2; Fig.
4 is a perspective view showing a guide plate according to the present invention.
5 is a perspective view showing a guide plate according to another embodiment of the present invention.
6 is a perspective view showing a guide plate according to another embodiment of the present invention.
7 is a perspective view of a seat cover manufactured according to the present invention;
8 is a use state diagram of Fig.
9 is a process flow chart of a method of manufacturing a seat cover according to the present invention.

The terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary meanings, but the inventor may appropriately define the concept of the term to describe its invention in the best way Can be interpreted as meaning and concept consistent with the technical idea of the present invention.

It should be noted that the embodiments described in this specification and the configurations shown in the drawings are merely preferred embodiments of the present invention and do not represent all the technical ideas of the present invention, It should be understood that various equivalents and modifications may be present.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is characterized in that a plurality of bar-shaped rotating rollers 11 and a plurality of fixing bars 12 are arranged in a plurality of predetermined positions through fixing means P and are arranged along the mounting direction of the rotating rollers 11 The nonwoven fabric 1 is wound around the cylindrical roller 21 in the direction of the nonwoven fabric 1 which is provided on the upper side of the shelf 10 and guided through the shelf 10, And a fixing bar 12 positioned between the yarn supplying unit 20 and the nonwoven fabric 1. The yarn supplying unit 20 includes a plurality of yarn supplying units 20, (30) guiding the yarn (2) transmitted from the yarn guide (20) to twist and guiding the twisted yarn to the surface position of the nonwoven fabric (1) to be thermally fused; And a fused portion 40 which is positioned between the guide plate 30 and the nonwoven fabric 1 and receives the twisted yarn 2 through the guide plate 30 to be positioned on the surface of the nonwoven fabric 1 and heat- .

The rotating roller 11 and the fixing bar 12 are installed in the nonwoven fabric 1 so that the nonwoven fabric 1 can be easily conveyed along a plurality of rotating rollers 11 installed on the upper side of the shelf 10. [ 1 and easy installation and operation of the guide plate 30 and the fused portion 40 which are operated in the process of conveying the nonwoven fabric 1 are installed in the shelf 10,

1, the rotating rollers 11 are preferably provided on the upper side of the shelf 10, and the rotating rollers 11 and the fixing bars 12 are provided on the nonwoven fabric It is preferable to provide a direction orthogonal to the conveying direction of the substrate 11.

1, the yarn supply unit 20 is constructed so that the yarn 2 can be wound on the outer side of the roller 21, and the yarn supply unit 20 is selectively installed on the upper side of the shelf 10, Is guided to the surface of the nonwoven fabric (1) conveyed from the top of the shelf (10).

This configuration is configured such that the yarn 2 wound on the roller 21 of the yarn supply unit 20 is released and can be brought into contact with the surface of the nonwoven fabric 1 conveyed from above the shelf 10. [

1 to 4, a plurality of guide plates 30 are provided at intervals in a fixing bar 12 provided on the shelf 10, The yarn 2 that is installed in the fixing bar 12 positioned between the supply unit 20 and the nonwoven fabric 1 and released from the yarn supply unit 20 can be easily transferred to the selected surface of the nonwoven fabric 1 .

For example, in the guide plate 30, the yarn 2 released from the yarn supply unit 20 is guided so as to surround the outside of the guide plate 30 and guided in the direction of the fused portion 40 dlm through the lower portion of the guide plate 30 So that the thread 2 unwound from the thread feeder 20 can be twisted in the direction of the fused portion 40 to be delivered.

The guide plate 30 is connected to the fixing bar 12 so as to enclose the fixing bar 12. The fixing plate 31 has a plurality of nut holes 31a formed at the other end of the connecting portion and has a through hole A plurality of fastening holes (32a) corresponding to the nut holes (31a) are formed in the inner central portion along the longitudinal direction, and a plurality of fastening holes (32a) And a fixed plate 32 having a plurality of discharge holes 32b to which the plurality of discharge holes 32b can be discharged.

1 to 4, the fixture 31 is detachably coupled to a fixing bar 12 provided on the shelf 10 through a fixing means P, and as shown in FIG. 1, the fixing bar 31 12 are formed at the other end surface thereof with a plurality of nut holes 31a through which fixing means P passing through the fixing plate 32 can be fastened.

The fastening holes 32a of the fastening plate 32 are formed at positions corresponding to the nut holes 31a of the fastening holes 31 as shown in FIGS. 2 and 3, The fixing plate 32 can be easily attached to one side of the fixing member 31 through the means P and the user can easily adjust the fixing position of the fixing plate 32 coupled to the fixing member 31 .

6, the guide plate 30 is connected to enclose the fixing bar 12, and a plurality of (for example, two or more) A fixing hole 31 in which a nut hole 31a is formed and a threaded hole 2b in which a thread 2 transmitted from the thread supply part 20 surrounds the outer side and is formed in a rectangular plate shape, And a coupling plate 32d having a plurality of coupling holes 32a corresponding to the nut holes 31a is formed in the guide holes 32c by fastening bolts 32e coupled to the guide holes 32c, And a fixing plate 32 having a plurality of discharge holes 32b which are installed to be moved in accordance with the adjustment of the discharge port 32b and to which the chamber 2 can be discharged at the lower end.

6, the fixture 31 is detachably coupled to the fixing bar 12 provided on the shelf 10 via the fixing means P. However, as shown in FIG. 6, A guide hole 32c is formed along an inner center portion of the guide hole 32c and an engaging plate 32d having a plurality of fastening holes 32a is moved in accordance with the adjustment of the fastening bolt 32e to the inside of the guide hole 32c The user can grip the fastening bolt 32e without separating the fastening means P connecting the fastening plate 32 and the fastening 31 to adjust the engagement position of the fastening 31 and the fastening plate 32. [ The position of the engaging plate 32d can be easily moved inside the guide hole 32c and the engaging position of the fixing member 31 and the fixing plate 32 can be adjusted.

The above configuration can be selectively applied according to the manufacturing environment or the user's choice.

5, the guide plate 30 according to the present invention is further provided with a connection shaft 33 whose surface is covered with a urethane 33a on the outer side of the fixing plate 32 And the connection shaft 33 is further coupled with a guide roller 34 which can be guided and closely contacted with the yarn 2 transferred from the yarn supply unit 20. [

This configuration minimizes the occurrence of napping due to friction between the fixing plate 32 and the thread 2 by making the process of guiding the thread 2 more easily to the outer side of the fixing plate 32, To prevent damage.

The urethane 33a is wrapped around the connecting shaft 33 by controlling the rotational force of the guide roller 34 coupled to the connecting shaft 33 so that the tension of the yarn guided to the fused portion 40 So as to prevent the twist of the yarn 2 from being loosened.

Even when the guide plate 30 according to the above-described embodiments of the present invention is applied to this structure, the threaded portion 40, which is wrapped around the outer side of the fixing plate 32 constituting the guide plate 30 and guided to the fused portion 40 2 are twisted and can be easily guided to a position to be joined with the nonwoven fabric 1.

1 to 6, the discharge hole 32b provided in the fixing plate 32 is in contact with the fixing plate 32 so that the thread 2 guided to surround the outer side of the fixing plate 32 is in close contact with the fixing plate 32, And is guided in the direction of the discharge hole 32b so as to facilitate the twisted state.

1 to 3, the fused portion 40 includes a rotation bar 41 installed on the shelf 10 and a plurality of rotation bars 41 provided on the rotation bar 41, And a plurality of locking protrusions 42a for receiving the yarn 2 transmitted from the guide plate 30 so that the yarn 2 positioned in the locking protrusion 42a is guided to the surface of the nonwoven fabric 1 by low- And a fusing roller 42 for guiding and fusing the sheet.

The rotary bar 41 is rotated in a direction corresponding to the rotary roller 11 rotated on the upper side of the shelf 10 through a motor (not shown) provided on the shelf 10 .

This is because when the nonwoven fabric 1 is conveyed to the upper side of the shelf 10, the engaging projection 42a of the fusing roller 42 can be rotated on the surface of the nonwoven fabric 1 with ease.

The seal 1 which is transferred to the fused portion 40 through the discharge hole 32b of the fixing plate 32 constituting the guide plate 30 is continuously engaged with the fender 42a of the fusing roller 42 Can be brought into close contact with the surface of the nonwoven fabric 1 conveyed from the upper side of the shelf 10 and frictional heat is generated at the close contact portion between the nonwoven fabric 1 and the yarn 1 in accordance with the low frequency vibration of the fusing roller 42 The thread 2 is easily bonded to the surface of the nonwoven fabric 1 through the guide plate 30 by mutual fusion.

1, between the yarn supply unit 20 and the guide plate 30, a yarn 2 guided from the yarn supply unit 20 in a plate shape movable from above the shelf 10, And a guide plate 50 for adjusting the tension of the yarn 2 according to a change in a position where the through hole 51 is formed and is installed.

This configuration is for the user to adjust the tensile force of the yarn supplied to the guide plate 30 so that the twisting process of the yarn 2 guided through the guide plate 30 is more easily performed. The tension of the thread passing through the through hole 51 of the guide plate 50 can be easily adjusted.

A method of manufacturing a seat cover using the apparatus for manufacturing a seat cover according to the present invention will now be described.

9 is a view showing the entire flow of a method of manufacturing a seat cover according to the present invention. First, the yarn 2 of the yarn supply unit 20 is wound around the outer side of the guide plate 30, (20S) is twisted and connected to the fusing roller (42) of the fused portion (40).

The thread of the yarn feeder 20 is positioned so as to surround the outer side of the guide plate 30 and then the ends of the yarn are connected to the plurality of locking protrusions 42a formed along the outer circumference of the fusing roller 42 The yarn 1 is continuously engaged with the engaging projection 42 through the rotation of the fusing roller 42 so that the yarn 2 can be easily brought into close contact with the surface of the nonwoven fabric 1.

In order to achieve this, the discharge hole 32b of the guide plate 30 and the engagement protrusion 42a of the fusing roller 42 are disposed to be adjacent to each other.

Next, a joining position adjusting step 20S for finely adjusting the installation position of the guide plate 30 guided by the yarn 2 so that the yarn connected to the fusing roller 42 is positioned at a position to be joined to the nonwoven fabric 1; .

This step is performed by the guide plate 30 guided by the yarn 2 even when the yarn 2 transferred from the yarn supply unit 20 is twisted and the yarn is to be transferred to the fusing roller 42 through the structure of the guide plate 30 So that the user can adjust the tension of the yarn 2 so that the yarn 2 can be easily moved and twisted.

After the joining position adjustment step 20S, the nonwoven fabric 1 is transferred using the rotating roller 11 provided on the upper side of the shelf 10, and the nonwoven fabric 1 is fused (30S) for rotating the fusing roller (42) of the nonwoven fabric (40) so that the yarn (2) adheres to a selected position of the nonwoven fabric (1).

This step is for the user to confirm whether the yarn 2 guided through the guide plate 30 is in close contact with the selected position of the nonwoven fabric 1.

In this step, the user confirms the twist state of the thread 2 adhered to the selected position of the nonwoven fabric 1 and starts to proceed, or returns to the above-described joint position adjustment step 20S, The position of the yarn transferred to the fusing roller 30 and the fusing roller 42 may be adjusted again.

After the above step, the contact state of the nonwoven fabric 1 and the yarn 2 is confirmed through the bonding position contact step 30S and the yarn 2 is stuck to the surface of the nonwoven fabric 1 through the low frequency vibration of the fusing roller 42, (40S) for joining the first and second substrates; And a cutting step (50S) of cutting the nonwoven fabric (1) bonded to the surface of the yarn (2) through the thermal welding step (40S) according to the selected length.

In this step, the yarn 2 adhered to the surface of the nonwoven fabric 1 is bonded to the surface of the nonwoven fabric 1 by means of low-frequency vibration of the fusing roller 42, and the nonwoven fabric 1 bonded to the surface of the yarn 2 And cutting them together.

Through the above process, the joining of the yarn 2, which can be easily adhered to the saw blade 3a of the chair 3, can be performed stably and quickly on the surface of the nonwoven fabric 1 conveyed from the upper side of the shelf 10 7 and 8 can be easily attached to the squeezer 3a provided on the chair base 3 of the chair so that the use of the seat cover can be achieved. You can.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit or scope of the invention as set forth in the following claims It will be apparent to those of ordinary skill in the art.

1: nonwoven fabric 2: yarn
3: Chair
10: shelf 11: rotating roller
12: Fixing bar 20: Thread supply part
21: roller 30: guide plate
31: fixture 31a: nut hole
32: fixing plate 32a: fastening hole
32b: Exhaust hole 32c: Guide ball
32d: coupling plate 32e: fastening bolt
33: connecting shaft 33a: urethane
34: guide roller 40: fused portion
41: rotating bar 42: fusing roller
42a: a locking projection 50: a guide plate
51: Through hole
10S: Preparing the bonding step 20S: Step of adjusting the bonding position
30S: bonding position contact step 40S: thermal bonding step
50S: cutting step

Claims (8)

A plurality of rotary rollers 11 and a plurality of fixing bars 12 having a bar shape are arranged in a plurality of predetermined positions via fixing means P and the nonwoven fabric 1 is wound along the installation direction of the rotary rollers 11. [ A shelf 10 guided by the shelf 10,
A yarn feeder 20 installed at an upper portion of the shelf 10 and adapted to transmit a yarn 2 wound around a cylindrical roller 21 in the direction of the nonwoven fabric 1 guided through the shelf 10; );Wow,
A plurality of spaced apart fixing bars 12 are disposed between the yarn supply unit 20 and the nonwoven fabric 1 to guide the yarn 2 delivered from the yarn supply unit 20 to be twisted, A guide plate (30) for guiding the true thread to the surface position of the nonwoven fabric (1) to be thermally fused; And
A fused portion 40 which is positioned between the guide plate 30 and the nonwoven fabric 1 and which receives the twisted yarn 2 through the guide plate 30 to be positioned on the surface of the nonwoven fabric 1 and heat- Including,
The guide plate (30)
A fixture 31 connected to surround the fixing bar 12 and having a plurality of nut holes 31a formed on the other end surface of the connected portion,
A thread 2 which is transmitted from the yarn supply unit 20 is formed in a rectangular plate shape that can surround the outer side and can be discharged from the lower side and has a fastening hole 32a corresponding to the nut hole 31a along the longitudinal direction And a fixing plate (32) formed with a plurality of discharge holes (32b) through which the yarn (2) can be discharged at the lower end.
delete The method according to claim 1,
The guide plate (30)
A fixture 31 connected to surround the fixing bar 12 and having a plurality of nut holes 31a formed on the other end surface of the connected portion,
A guide hole 32c is formed in the inner central portion of the chamber 2 in a rectangular plate shape that can be discharged from the lower end of the chamber 2 and surrounds the outer side of the chamber 2. The guide hole 32c, A coupling plate 32d having a plurality of coupling holes 32a corresponding to the nut holes 31a is installed to be moved according to the adjustment of the coupling bolts 32e coupled to the guide holes 32c, (32) having a plurality of discharge holes (32b) capable of discharging the plurality of discharge holes (2).
The method according to claim 1 or 3,
The fixing plate 32 further includes a connecting shaft 33 whose surface is covered with a urethane 33a,
Wherein the guide shaft (34) is further coupled to the connection shaft (33) so that the yarn (2) transmitted from the yarn supply unit (20) can be closely contacted and guided.
The method according to claim 1,
The fused portion 40
A rotary bar 41 installed on the shelf 10,
And a plurality of locking protrusions 42a provided on the rotating bar 41 and receiving the thread 2 transmitted from the guide plate 30 along the outer circumference of the rotary bar 41. The locking protrusions 42a And a fusing roller (42) for guiding the yarn (2) positioned on the surface of the nonwoven fabric (1) to the surface of the nonwoven fabric (1) and thermally fusing the same.
The method according to claim 1,
Between the yarn supplying section 20 and the guide plate 30,
A through hole 51 through which the thread 2 guided from the thread supply part 20 is formed is formed in a plate shape movable from above the shelf 10 so that the tension of the thread 2 And a guide plate (50) for adjusting the position of the seat cover (50).
delete delete

Images