JP3771387B2 - Seat back, seat back replacement method, and seat back manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a backrest for a seat used in vehicles such as buses and trains, and more particularly to a backrest for a seat whose shape, pattern color, and the like can be changed.
[0002]
[Prior art]
Conventionally, for example, seat backs used for vehicles such as buses include a back frame that forms a skeleton, a plywood that is fixed to the back frame, a pad that is attached to the plywood, and a pad on the pad. There is an epidermis that is attached to the back, a decorative plate that is attached to the back of the back, and an accessory such as a grip, an ashtray, and a cup holder that are secured to the decorative plate through the epidermis. The backrest of this structure is designed on the assumption that once it is attached to a vehicle, it will continue to be used for as long as it is. For this reason, when the backwear becomes old or dirty, the epidermis is peeled off, and a new epidermis or a clean epidermis after washing is only applied again. In addition, in order to change the skin, it is necessary to remove and attach the decorative plate on the back and the accessory before and after the work.
[0003]
[Problems to be solved by the invention]
By the way, the same vehicle may be used under various circumstances. In this case, if the landscape inside the vehicle, especially the color and shape of the backwear that occupies a part of it, can be changed for each use situation, it will be advantageous in providing a rank difference from other vehicles. is there. However, as described above, with the conventional technology for changing the epidermis, the pattern color of the back cover can be changed by changing the tension, but it takes time and effort to change the pattern, and until the shape is changed. Can not. Therefore, in reality, only a safe one that does not give the passenger a sense of incongruity in many situations in which the vehicle is used is selected as the backrest form.
[0004]
Then, this invention makes it a subject to provide the seat back which can be easily changed into the form according to a use condition.
[0005]
[Means for Solving the Problems]
  The present invention includes an adherend having a back support frame as a main part and the whole being integrally formed, a mounting body having a back support body as a main part and having the whole being integrally formed, and the mounting body. Connecting means for detachably connecting a body to an adherend, and the connecting means is provided at an outer edge of the back support body and is flexible along the outer surface of the back support frame; A locking member for releasably locking the flexible portion wound around the backrest frame to the backrest frame or the backrest body, and the backrest body includes a pad. And the flexible part includes a pad extension part formed by extending the pad and enclosing the backrest frame.
  Further, in the present invention, in addition to the configuration of the above-described invention, the backrest main body may include a hollow core.
  Further, in the present invention, in addition to the configuration of the above invention, the backrest body includes a hollow core, a pad attached to the core, and a skin covering the core and the pad. Can also.
[0006]
  the aboveBookAccording to the invention, the backrest is roughly divided into an adherend having a backrest frame as a main part and a mounting body having a backrest body as a main part. Of these, only the wearing body, that is, only a part of the back cover, is to be replaced. And if a mounting body is connected with a to-be-adhered body by a connection means, it will become a backrest. When the connected state by the connecting means is released from this state, it is possible to remove the mounting body from the adherend. In this manner, the attachment body is attached to and detached from the adherend. Therefore, if you prepare multiple mounting bodies of different forms, select the mounting body according to the usage situation from among them, replace it with the mounting body that has been attached to the adherend, It depends on the usage situation.
[0010]
  Also, the above bookAccording to the invention, the attachment / detachment of the mounting body is performed at the outer edge of the backrest body. Specifically, when the mounting body is attached, the flexible portion of the back support body is bent along the outer surface of the back support frame. The flexible portion wound around the backrest frame is locked to the backrest frame or the backrest body by the locking member. By this locking, the flexible portion is held in a state of being wound around the backrest frame. On the other hand, when removing the mounting body, the locked state by the locking member is released. Then, the force to keep the flexible portion in a state where it is wound around the backrest frame is lost.
[0012]
  Also, those with a coreThe core functions as the backbone of the backrest body. Since the core is hollow, the core is lightweight and has a predetermined rigidity.
[0014]
  In addition, in the case having a core, a pad, and an epidermis, the core functions as a skeleton of the back cover body, the pad functions as an element that gives an uneven pattern or a soft feel of the back cover body, and the epidermis of the back cover body Functions as an element that determines the appearance. Since the core is hollow, the core is lightweight and has a predetermined rigidity.
  Furthermore, the seat back of the seat according to the present invention includes, in addition to the above-described configuration, “the core is a first core that forms a skeleton of a backrest portion and a skeleton of the headrest portion, and includes a rear core and a front core. The second core is formed integrally with the first core, and the front core is positioned in front of the rear core ”.
  According to the seat back replacement method of the present invention, the seat back according to any one of claims 1 to 4, wherein the mounting body is replaced with the adherend. A method for replacing a seat back, wherein when the mounting body is removed from the adherend, the flexible portion wound around the back frame is pulled while being bent and locked by the locking member. The upper body of the backrest frame is lifted out from the headrest portion by lifting the mounting body, and when the mounting body is attached to the adherend, the headrest portion is placed on the upper portion of the backrest frame. The flexible portion is wound while being bent along the outer peripheral surface of the backrest frame, and the flexible portion is locked to the backrest frame by the locking member.
  Furthermore, the manufacturing method of a seat back according to the present invention is “a method for manufacturing a seat back according to claim 4, wherein the second core is blow-molded integrally with the first core. The front core is formed above the rear core at the time of blow molding, and then bent forward at the hinge portion at the upper end of the rear core.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which the present invention is embodied in a backrest of a seat for a sightseeing bus will be described with reference to the drawings.
[0016]
As shown in FIG. 1 and FIG. 2, the backrest 1 is roughly divided into a common adherend 2 supported by a seat frame (not shown) of the seat and a removable attachment to the adherend 2. And the mounting body 3 to be mounted. The main part of the adherend 2 is constituted by a backrest frame 4. Many of the back support frames 4 are formed of a hollow material. An intermediate frame 5 is bridged over the backrest frame 4. On the rear side of the intermediate frame 5, a decorative plate 6 with an outer skin is disposed, and the decorative plate 6 is fixed to the backrest frame 4. An accessory to which a relatively large stress is applied, for example, a grip 7 to which a backward pulling force is applied, may be fastened to the decorative plate 6 by bolts, nuts or the like (not shown). In this case, the accessory is fixed to the intermediate frame 5 through the decorative plate 6. The back support frame 4, the intermediate frame 5, and the decorative plate 6 constitute most of the adherend 2.
[0017]
On the other hand, the main part of the mounting body 3 is constituted by a back support body 8. The back support body 8 functionally includes a backrest portion 9 for receiving the back of the user and a headrest portion 11 for receiving the head. Further, the back support body 8 includes a core 12 having a substantially hollow shape as shown in FIGS. 3 and 4, a pad 13 attached to the core 12, and the core 12 and the pad 13. It consists of a covering skin 14. The core 12 is made of a synthetic resin, and the whole is integrally formed by a blow molding method. Here, the blow molding method is one of thermoplastic resin molding methods and is also called a blow molding method, a hollow molding method, or the like. In the blow molding method, a molding material is extruded into a pipe shape from an extruder, this (parison) is sandwiched between a pair of molds, and air or the like is blown into it to form a hollow product. Although it does not specifically limit as a synthetic resin which forms the core 12, For example, a polypropylene (PP), polyethylene (PE), an acrylonitrile butadiene styrene copolymer (ABS), vinyl chloride (PVC) etc. can be used. As shown in FIGS. 6 to 8, the core 12 includes a first core 15 that forms the skeleton of the backrest portion 9 and a second core 16 that forms the skeleton of the headrest portion 11.
[0018]
The first core 15 has a closed internal space. A shallow concave portion 18 (see FIGS. 4 and 5) for accommodating the front side portion of the back support frame 4 is provided on the side edge portion and the lower edge portion of the rear surface of the first core 15. The recess 18 has a width wider than the outer diameter of the backrest frame 4. In addition, a protrusion 19 for acupressure is provided on the front surface of the first core 15. The position, number (including zero), shape, and size of the protrusions 19 are not particularly limited and can be appropriately changed.
[0019]
The second core 16 includes a rear core 22 and a front core 21 located on the front side thereof. In the lower part of the rear core 22, a part corresponding to the insertion / removal opening 23 for inserting and removing the upper part of the back support frame 4 is cut out, and a part corresponding to the decorative board 6 is also cut out. In the rear core 22, the upper vicinity and the lateral vicinity of the cut portion 24 serve as an upper latching portion 25 for latching the upper portion of the backrest body 8 to the upper portion of the backrest frame 4. Unlike the rear core 22, the front core 21 is not cut and has a closed space inside. The front core 21 is foldably connected to the upper end portion of the rear core 22 by a hinge 26. This hinge 26 is also formed when the core 12 is blow-molded. The front core 21 is formed above the rear core 22 at the time of blow molding as shown by a two-dot chain line in FIG. 6, but is bent forward at the hinge 26 portion when the mounting body 3 is assembled thereafter, It is attached to the rear core 22 with a screw 20 or the like.
[0020]
As shown in FIG. 3 and FIG. 4, the pad 13 is for giving the uneven pattern of the back support body 8 and a soft feel, and is made of a material having elasticity such as urethane foam. The pad 13 is fixed to a portion excluding the rear surface of the core 12 by means such as adhesion. In particular, the pad 13 stretched on the acupressure protrusion 19 described above is relatively thin. The skin 14 is an element that determines the appearance of the back support body 8, and is made of fabric (knitted fabric), felt, genuine leather, synthetic leather, or the like. As the fabric, knitted fabrics such as tricot, russell and jersey, and woven fabrics such as plain weave and moquette can be used. In the place where the pad 13 is fixed to the core 12, the skin 14 is stuck on the pad 13. Further, the skin 14 is directly attached to the core 12 at a place where the pad 13 is not present, for example, at the rear surface of the core 12.
[0021]
As shown in FIGS. 2 and 3, accessories such as an ashtray 27, a cup holder 28, and luggage that are not as stressed as the grip 7 are applied to the rear surface of the first core 15 from the top of the skin 14. A net pocket 29 or the like for insertion is attached. For this attachment, it is desirable to embed the nut in the core 12 by, for example, blow molding the nut as an insert. In this way, the accessory can be fixed to the core 12 by screwing the bolt passed through the accessory into the nut. And most of the mounting body 3 is comprised by these backrest main bodies 8 and accessories.
[0022]
A plurality of mounting bodies 3 having the above-described configuration are prepared including those shown in FIG. These mounting bodies 3 have different forms. Here, the “mounting body 3 having a different form” means, for example, the mounting body 3 in which at least a part of components such as the shape and material of each part and the color of the skin 14 are different, in other words, all other than the same. The mounting body 3 is said. As the mounting body 3 having a different shape, for example, as shown in FIG. 1, a protrusion 30 that regulates the lateral displacement of the user's back is provided on the backrest 9, FIGS. 1 and 9. As shown in FIG. 9 (f), as shown in FIGS. 9 (a), 9 (c) and 9 (d), as shown in FIGS. As shown in FIG. 9B, the headrest portion 11 is greatly bulging forward, as shown in FIGS. 9C and 9D, the headrest portion 11 is folded back at the upper end, and as shown in FIG. 9B. Further, a seat with an armrest as shown in FIG. 9 (g), in which a vertically long uneven portion 32 is provided on the backrest portion 9, as shown in FIG. In order to prevent interference with the armrest, part of the backrest 9 Such as those that have been cut out, and the like. These are merely examples, and other shapes may be used.
[0023]
By the way, in backpack 1 of this embodiment, the device for connecting the mounting body 3 to the to-be-adhered body 2 so that removal is possible is made | formed. One of them is that, as described above, the rear core 22 is provided with the insertion / removal port 23 and the upper hooking portion 25. In addition, as shown in FIG. 5, a hook 36 having an L-shaped cross section is fixed to the lower frame 35 of the backrest frame 4 by means such as welding. The gap between the hook 36 and the lower frame 35 serves as a lower latching portion 37 for latching the lower portion of the back support body 8, more specifically, the lower end portion 15 a of the first core 15 to the lower portion of the backrest frame 4. ing.
[0024]
As shown in FIG. 2, a flexible portion 33 is provided on the outer edge portion of the backrest portion 9, more specifically on the side edge portion 9a and the lower edge portion 9b. As shown in FIGS. 4 and 5, the flexible portion 33 is formed by extending the pad 13 and the skin 14 described above behind the first core 15 (downward in FIG. 4, rightward in FIG. 5). It is thin, can be bent inward along the outer peripheral surface of the backrest frame 4 and wound around the backrest frame 4. In order to releasably lock the flexible portion 33 wound in this manner to the backrest frame 4, an adhesive cloth as a locking member is provided on the inner surface of the flexible portion 33 and the outer peripheral surface of the backrest frame 4. 34 (also referred to as hook-and-loop fasteners) are fixed by means such as adhesion. The insertion / removal port 23, the upper hooking portion 25, the lower hooking portion 37, the flexible portion 33, and the adhesive cloth 34 constitute a connecting means.
[0025]
Next, the operation and effect of the present embodiment configured as described above will be described. 2 to 5 show a state in which the mounting body 3 is attached to the adherend 2. In this state, the upper portion of the backrest frame 4 enters the upper hooking portion 25, and the upper portion is wrapped by the rear core 22. The contact of the wall surface of the upper hooking portion 25 with the backrest frame 4 restricts the movement of the headrest portion 11 downward, sideward, forward, backward, and the like. Further, the lower end portion 15a of the first core 15 enters the lower hooking portion 37 of the backrest frame 4, and the lower end portion 15a is supported from the lower side by the lower hooking portion 37, and the hook 36 and the lower frame 35 It is sandwiched. This support and pinching restricts the movement of the lower portion of the backrest body 8 to the lower, front, rear, and the like. Accordingly, not only the headrest portion 11 but also the entire mounting body 3 including the backrest portion 9 does not drop carelessly from the adherend 2. On the other hand, the middle part of the backrest frame 4 and the lower frame 35 enter the recess 18. The flexible portion 33 is wound around the backrest frame 4 and is attached to the backrest frame 4 with an adhesive cloth 34. By this winding and pasting, movement of the backrest 9 in all directions is prevented. For this reason, the mounting body 3 does not rattle.
[0026]
Further, most of the back frame 4 except for the leg portions 4 a is covered and hidden by the rear core 22 and the flexible portion 33. Moreover, the distal end portion of the flexible portion 33 is pushed into the recess 18 and this portion is also hidden. Therefore, passengers such as buses do not see the tips of the back support frame 4 and the flexible portion 33, and the back support 1 looks good.
[0027]
Here, the front core 21 which forms a part of the skeleton of the headrest portion 11 and whose internal space is closed has a predetermined rigidity. For this reason, the headrest portion 11 including the front core 21 receives the load on the user's head leaning against the backrest 1. Since the grip 7 is fixed to the backrest frame 4 side, even if a large stress is applied to the grip 7, it is not transmitted to the headrest portion 11 and the headrest portion 11 is not deformed. Similarly, the first core 15 that forms the skeleton of the backrest portion 9 and whose internal space is closed has a predetermined rigidity. For this reason, the backrest part 9 including the first core 15 receives the load on the back of the user leaning on the backrest 1. In addition, unlike the headrest part 11 mentioned above, the backrest part 9 is subjected to loads of the ashtray 27, the cup holder 28, the net pocket 29, etc., and stress due to their operation. However, these accessories are light in nature, and the stress due to the operation is not so large in the grip 7. Therefore, these loads and stresses are received by the rigidity.
[0028]
When a relatively large stress such as a tensile force is applied to the grip 7, the stress is transmitted to the backrest frame 4 via the decorative plate 6 and the intermediate frame 5. The rigidity of the backrest frame 4 is higher than that of the core 12 formed in a thin shape by a synthetic resin. Therefore, the stress is received by the backrest frame 4, and the backrest 1 is not deformed and maintains a predetermined shape. Thus, the back support 1 of this embodiment exhibits the necessary basic performance similar to the conventional back support.
[0029]
When exchanging the mounting body 3 with a different form in the back support 1, the mounting body 3 is first removed from the adherend 2 as follows. 4 and 5, the flexible portion 33 is pulled backward while being bent, the adhesive cloth 34 in close contact with each other is peeled off, and the locked state by the adhesive cloth 34 is released. Then, the force for keeping the flexible portion 33 in a state of wrapping the backrest frame 4 is lost. In the process in which the adhesive cloth 34 is peeled off, the distal end portion of the flexible portion 33 comes out of the concave portion 18, and the restraining force on the backrest frame 4 due to the winding of the flexible portion 33 is lost. At this stage, the headrest portion 11 is still placed on the upper portion of the backrest frame 4. Further, the lower end portion 15 a of the first core 15 enters the lower latching portion 37. Next, when the mounting body 3 is lifted, the lower end 15a is pulled out from the lower hooking portion 37, and the regulation of the backrest body 8 by the lower hooking portion 37 is removed. Further, the upper portion of the backrest frame 4 is gradually pulled out from the upper latching portion 25 and the insertion / removal port 23. When it comes out completely, there is no restriction on the upper portion of the backrest frame 4 by the upper hooking portion 25. As a result, the mounting body 3 including the ashtray 27 and the cup holder 28 is separated from the adherend 2. The decorative plate 6 and the grip 7 remain on the backrest frame 4.
[0030]
When attaching the adherend 2 with another form of the attachment 3, the attachment 3 is covered from above the adherend 2 as follows. The mounting body 3 is lifted, and the upper portion of the backrest frame 4 is inserted into the rear core 22 through the insertion / removal port 23, and the mounting body 3 is gradually lowered. On the way, when the lower end portion 15 a of the first core 15 is inserted into the lower latching portion 37, the lower portion of the back support body 8 is hooked on the lower portion of the back support frame 4. When the entire upper portion of the backrest frame 4 enters the rear core 22, the headrest portion 11 is hooked on the upper portion of the backrest frame 4. When the upper and lower portions of the backrest body 8 are hooked on the upper and lower portions of the backrest frame 4 as described above, the middle portion and the lower frame 35 of the backrest frame 4 enter the recess 18 and come into contact with the wall surface. Subsequently, the flexible portion 33 is wound while being bent along the outer peripheral surface of the backrest frame 4. The adhesive cloth 34 is pasted together while pushing the tip portion of the flexible portion 33 into the recess 18. Then, the flexible portion 33 is locked to the backrest frame 4 by the adhesive cloth 34, and the backrest frame 4 is held in a state of being wrapped by the bent flexible portion 33. As a result, the mounting body 3 is connected to the adherend 2 so as not to fall off, so that the backrest 1 is formed.
[0031]
As described above, the back support 1 of the present embodiment includes the adherend 2 having the back support frame 4 as a main part, the mounting body 3 having the back support body 8 as the main part, and the connection for connecting both 2 and 3. It consists of means. Of these adherends 2 and attachments 3, only the latter, that is, only a part of the backrest 1, is to be replaced. Since the adherend 2 is used as a common part and is not replaced, the cost required for replacement can be reduced as compared with the case where the entire backrest 1 is to be replaced. Moreover, in order to connect the mounting body 3 to the adherend 2, the upper portion of the backrest body 8 is hooked to the upper portion of the backrest frame 4 at the upper hooking portion 25, and the backrest body 8 at the lower hooking portion 37. The pad 13 and the outer skin 14 are extended to form a flexible portion 33, and the flexible portion 33 is locked to the backrest frame 4 by an adhesive cloth 34. A simple configuration is adopted. No fasteners such as bolts, nuts and screws are used. For this reason, the upper part of the back support frame 4 is inserted into the upper latching part 25, the lower end part 15a of the first core 15 is inserted into the lower latching part 37, or the flexible part 33 is bent to bond the cloth. The attachment body 3 can be attached to or removed from the adherend 2 in a short time by performing a very simple operation of pasting or peeling 34.
[0032]
In addition, since the attachment body 3 can be mounted / removed with the accessory attached, there is no need to install / remove the decorative plate on the back and the accessory as in the past, so there is no need for tools such as a wrench, wrench or screwdriver. is there. In addition, the mounting body 3 is light because the core 12 that forms the skeleton is hollow, and can be easily lifted and lowered during attachment to and removal from the adherend 2. Furthermore, since the owner (bus company) of the bus can replace the backpack 1, it is not necessary to perform the replacement by the manufacturer (manufacturer) of the backpack 1.
[0033]
Accordingly, a plurality of mounting bodies 3 having different forms are prepared in advance, and the mounting body 3 having a shape, pattern color, or the like corresponding to the use situation is selected from them, and has been attached to the adherend 2 until then. If it replaces | wears with the mounted body 3, the backrest 1 will become a thing according to a use condition. For example, passenger age, gender, occupation, bus destination, bus use purpose (for example, ceremonial occasion), bus operating hours (for example, morning and afternoon, going and returning), operating date, season, etc. Every time, it changes to the mounting body 3 suitable for them. At normal times, the mounting body 3 with the bright skin 14 is used, and in the case of pick-up at the ceremonial occasion, it is replaced with the mounting body 3 with the plain skin 14.
[0034]
The present embodiment has the following characteristics in addition to the matters described above.
[0035]
(A) The core 12 is covered with the pad 13 and the skin 14 and is not exposed to the outside. For this reason, it is not necessary to finish the surface of the core 12 cleanly. The core 12 may be any color, and there is no problem even if a plurality of colors are mixed. Therefore, the core 12 may be formed using a recycled resin material. Generally, when changing materials in blow molding, the material before switching and the material after switching are mixed. This mixed material cannot be used for normal product molding and is wasted. However, in this embodiment, even such a material can be used without any problem for the reason described above.
[0036]
(B) When the user leans against the back 1, the acupressure protrusion 19 provided on the front surface of the core 12 stimulates the pot through the thin pad 13, so that a massage effect can be expected.
[0037]
(C) By changing the shape, size, attachment position, and the like of the pad 13, any shape of the mounting body 3 can be easily created, and the degree of freedom in design is high.
[0038]
(D) The core 12 formed of polypropylene is superior in adhesiveness to the urethane foam pad 13 as compared with the case of being formed of an olefin-based synthetic resin. For this reason, even if the flexible portion 33 is repeatedly bent, the pad 13 is not easily peeled off from the core 12.
[0039]
(E) Although the core 12 composed of the first core 15 and the second core 16 (the front core 21 and the rear core 22) has a complicated shape, the core 12 is easily formed only by blow molding. be able to.
[0040]
Note that the present invention can be embodied in another embodiment described below.
[0041]
(1) The present invention can be applied to a seat back in a vehicle other than a bus, for example, a railway vehicle such as a train. In addition, the present invention can be applied to a seat back in a vehicle other than a vehicle such as a ship or an aircraft, or a seat back in a movie theater, a theater, or a home.
[0042]
(2) An elastic body such as a sponge may be sandwiched between the front core 21 and the rear core 22. If it does in this way, the elasticity of an elastic body will be added to the pad 13, and the fluffy feeling (soft feeling) of the headrest part 11 will increase.
[0043]
(3) The mounting body to be attached to the adherend 2 may be of the same form as the mounting body that has been mounted so far.
[0044]
(4) The flexible portion 33 wound around the backrest frame 4 may be locked to the backrest body 8 instead of the backrest frame 4. Further, the flexible portion 33 may be locked to both the backrest frame 4 and the backrest body 8.
[0045]
(5) You may change the structure of the mounting body 3 into the thing different from the said embodiment. For example, the core 12 may be configured by a solid body. In this case, you may comprise the 2nd core 16 by one part (what united the front core and the rear core).
[0046]
(6) The core 12 may be formed according to a resin molding method other than the blow molding method, for example, an injection molding method (injection molding method).
[0047]
(7) The present invention can also be applied to a backrest of a type in which accessories are not attached to the decorative board 6.
[0048]
(8) The decorative board 6 is not necessarily required when the accessory is not attached. In this case, it is not necessary to cut out a portion corresponding to the decorative plate 6 in the rear core 22.
[0049]
(9) The back support body 8 may be configured by only the resin core 12 without using the pad 13 and the skin 14. Further, the back support body 8 may be constituted by the resin core 12 with the skin 14 stretched without using the pad 13.
[0050]
【The invention's effect】
  As aboveBookAccording to the invention, by replacing the mounting body on the adherend with another mounting body, the form of the backrest can be easily changed to one according to the use situation.
[0052]
  Moreover, according to the present invention,By performing a simple operation, the mounting body can be attached to or detached from the adherend in a short time.
[0053]
  Moreover, according to the present invention,It is possible to reduce the weight while securing the rigidity of the mounting body.
[0054]
  Furthermore, according to the present invention,It is possible to reduce the weight while securing the rigidity of the mounting body, and to easily create the outer shape of the mounting body
[Brief description of the drawings]
FIG. 1 is a perspective view showing an adherend and a mounting body in an embodiment of the present invention.
FIG. 2 is a rear view of a backrest.
FIG. 3 is a side sectional view of an upper portion of a backrest.
4 is an enlarged cross-sectional view taken along line XX of FIG.
5 is an enlarged sectional view taken along line YY in FIG. 2;
FIG. 6 is an explanatory diagram showing a correspondence relationship between a backrest frame and a core.
7 is an enlarged sectional view taken along line ZZ in FIG. 6;
FIG. 8 is a rear view showing a part of the upper part of the core in a cutaway manner.
FIG. 9 is a perspective view showing a mounting body having a different form.
[Explanation of symbols]
1 Backpack
2 adherend
3 wearing body
4 Back frame
8 Backpack body
9a Side edge
9b Lower edge
12 cores
13 Pad
14 epidermis
25 Upper latch
33 Flexible part
34 Adhesive cloth as a locking member
37 Lower latch

Claims (6)

An adherend comprising a back frame as a main part and configured as a whole;
The main body of the backrest body, and the entire body integrated into one body,
A connecting means provided on the mounting body and removably connecting the mounting body to the adherend;
The backrest body is composed of a backrest part and a headrest part that can be inserted into and removed from the upper part of the backrest frame,
The connecting means is provided on a side edge portion and a lower edge portion of the outer edge portion of the backrest portion , and a flexible portion that can be bent along an outer surface of the backrest frame, and a flexible portion wound around the backrest frame. And a locking member that releasably locks the flexible portion to the backrest frame or the backrest body,
The backrest body comprises a pad,
The seat back according to claim 1, wherein the flexible portion includes a pad extension portion formed by extending the pad and enclosing the backrest frame.   The seat back according to claim 1, wherein the back support body includes a hollow core.   The said back support body consists of the said core which makes hollow shape, the said pad attached to the core, and the skin which coat | covers the said core and the said pad, The Claim 1 or Claim 2 characterized by the above-mentioned. Seat backpack. The core without a first core forming a framework of the backrest, the skeleton of the headrest portion consists of a second core consists of the rear core and a front core,
Said second core, said first Core and integrally formed, before SL front core seat according to claim 2 or 3, characterized in that positioned overlapping the front of the rear core Spine. The seat back according to any one of claims 1 to 4, wherein the seat back is exchanged by replacing the mounting body with respect to the adherend.
When removing the mounting body from the adherend,
Pulling while flexing the flexible part wound around the back frame, releasing the locking by the locking member,
While lifting the mounting body and letting out the upper part of the backrest frame from the headrest part,
When attaching the mounting body to the adherend,
Put the headrest part on top of the back frame,
Winding while bending the flexible portion along the outer peripheral surface of the backrest frame,
The flexible portion is locked to the backrest frame by the locking member.
A method for changing the back of the seat. A method for manufacturing the seat back of claim 4, comprising:
The second core is blow molded integrally with the first core,
The method of manufacturing a seat backrest, wherein the front core is formed above the rear core at the time of blow molding and then bent forward at a hinge portion at an upper end of the rear core.

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