JP2018127068A - Seat pad, vehicle seat, and manufacturing method of seat pad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat pad which enables simplification of a work process.SOLUTION: A seat pad includes: a pad body having a front surface and a rear surface; and a reinforcement material integrated with the rear surface of the pad body. The pad body has a through hole which penetrates from the front surface to the rear surface. The reinforcement material includes a closing part which closes at least part of the through hole. The closing part has a fragile part which is set having strength lower than an adjacent portion. A worker presses the closing part to break the closing part starting with the fragile part and spread the breakage and thereby easily makes a hole in the closing part. Thus, a work process can be simplified compared to a case where the closing part is removed.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a seat pad provided with a through hole in a pad body, a vehicle seat, and a method for manufacturing the seat pad.

  Conventionally, some seat pads for vehicle seats such as automobiles are provided with through holes for attaching various components. In order to provide a through hole in a seat pad in which a reinforcing material is integrated on the back surface of the pad body, a through hole is provided in the pad body when the pad body is molded, and a reinforcing material on the inner peripheral side of the through hole is formed after the pad body is molded. There is a method of removing (Patent Document 1).

Japanese Utility Model Publication No.58-21701

  However, the conventional technique has a problem that a step of removing the reinforcing material on the inner peripheral side of the through hole is required after the pad body is formed.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a seat pad, a vehicle seat, and a seat pad manufacturing method capable of simplifying the work process.

  In order to achieve this object, the seat pad of the present invention comprises a pad body having a front surface and a back surface, and a reinforcing material integrated with the back surface of the pad body, the pad body from the front surface A through hole penetrating the back surface is provided, and the reinforcing member includes a blocking portion that closes at least a part of the through hole, and the blocking portion includes a weakened portion that is set to be lower in strength than an adjacent portion.

  Further, the seatpad manufacturing method of the present invention is a method for manufacturing a seatpad in which a reinforcing material is integrated with the back surface of the pad main body, the holding step for holding the reinforcing material in a mold, and the reinforcing material. And a molding step of integrating the pad body and the reinforcing material by charging the material into the cavity of the mold where the material is held, and the reinforcing material is lower than the adjacent portion. The weak part set to intensity | strength is provided, and the said metal mold | die is provided with the clamping part which protrudes in the said cavity and pinches | interposes the said weak part and its circumference | surroundings by the said holding process.

  According to the seat pad of the first aspect, at least a part of the through hole of the pad main body is closed by the closing portion. The closed portion of the reinforcing member includes a fragile portion that is set to be lower in strength than an adjacent portion. Therefore, by pushing the closing part, it is possible to easily provide a hole in the closing part by breaking or pushing the closing part starting from the fragile part. Thereby, compared with the case where the obstruction | occlusion part is removed, there exists an effect which can simplify a work process.

  According to the seat pad of the second aspect, the fragile portion is provided on each of the plurality of virtual lines. Thereby, the obstruction | occlusion part on the extension line | wire of a weak part can be easily broken along a virtual line. Furthermore, since at least two of the plurality of virtual lines intersect with each other, it is possible to easily spread the blocking part in different directions starting from the weak parts on the two virtual lines that intersect each other. As a result, in addition to the effect of claim 1, there is an effect that the hole of the blocking portion can be easily enlarged.

  According to the vehicle seat of the third aspect, the seat pad according to the first or second aspect is supported by the frame. By pressing the insertion member against the blocking portion, the insertion member can penetrate the blocking portion by breaking or pushing the blocking portion starting from the fragile portion. The insertion member penetrating the blocking portion is inserted into the through hole of the pad main body, and the insertion member is attached to the receiving member of the frame. Thus, since the closing part has a fragile part, the insertion member can be pushed through by the insertion member when the insertion member is attached, and the process of separately providing a hole through which the insertion member penetrates the closing part can be eliminated. As a result, in addition to the effect of claim 1 or 2, there is an effect that the work process can be further simplified.

  According to the vehicle seat of the fourth aspect, the reinforcing member is sandwiched between the insertion member and the receiving member in a state where the insertion member is attached to the receiving member. Thereby, since the force which expands the hole of the obstruction | occlusion part (reinforcement material) which the insertion member penetrated can be hard to be applied to the periphery of the hole, in addition to the effect of Claim 3, the obstruction | occlusion part (reinforcement material) which the insertion member penetrated This has the effect of making it difficult to break the reinforcing material starting from the holes.

  According to the seat pad manufacturing method of the fifth aspect, the reinforcing member includes the weakened portion set to be lower in strength than the adjacent portion. In the holding step, the reinforcing material is held in the mold, and the fragile portion and the periphery thereof are sandwiched by the clamping portion of the mold. Next, in the molding step, the material is put into the cavity of the mold holding the reinforcing material, the pad main body is molded, and the back surface of the pad main body and the reinforcing material are integrated. Since the sandwiching portion protrudes into the cavity, the pad main body is provided with a through hole in a portion corresponding to the sandwiching portion, and at least a part of the through hole is blocked by a reinforcing material provided with a weak portion in advance. By pushing the reinforcing material that closes the through-hole, the reinforcing material can be broken or pushed out from the fragile portion, and the hole can be easily provided in the reinforcing material. Thereby, compared with the case where the reinforcing material which blocks a through-hole is removed, there exists an effect which can simplify a work process.

  In addition, compared to the case where a weakened portion is provided in the closed portion of the reinforcing material integrated with the pad body, it is easier to handle the closed portion when the weakened portion is provided in the closed portion before being integrated with the pad main body. Can be easily provided. Therefore, there is an effect that the work process can be further simplified.

  According to the seat pad manufacturing method of the sixth aspect, the pad main body is made of a foamed synthetic resin formed by foaming and curing the foaming stock solution in the cavity of the mold. Since the reinforcing material composed of a material that can be impregnated with the foaming stock solution is sandwiched between the sandwiching portions protruding into the cavity, the foaming stock solution can be filled around the sandwiching portion while impregnating the reinforcing material. Therefore, it is difficult to generate a void around the sandwiching portion, and in addition to the effect of claim 5, there is an effect that molding defects of the pad main body can be suppressed.

It is a rear view of the vehicle seat in 1st Embodiment of this invention. It is a rear view of a seat pad. (A) is explanatory drawing which shows before shaping | molding of a pad main body, (b) is explanatory drawing which shows after shaping | molding of a pad main body. It is sectional drawing of the vehicle seat before attaching a hook. It is sectional drawing of the vehicle seat which attached the hook. (A) is a rear view of the obstruction | occlusion part in 2nd Embodiment, (b) is a rear view of the obstruction | occlusion part in 3rd Embodiment, (c) is the back surface of the obstruction | occlusion part in 4th Embodiment. It is a figure, (d) is a rear view of the obstruction | occlusion part in 5th Embodiment, (e) is a rear view of the obstruction | occlusion part in 6th Embodiment.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. First, with reference to FIG.1 and FIG.2, the vehicle seat 1 in 1st Embodiment of this invention is demonstrated. FIG. 1 is a rear view of the vehicle seat 1, and FIG. 2 is a rear view of the seat pad 10. In FIG. 1, the frame 5 of the seat back 3 is illustrated by a broken line, and a part of the cover 6 of the seat back 3 (upper left side in FIG. 1) is broken.

  As shown in FIG. 1, the vehicle seat 1 is a seat mounted on an automobile. The vehicle seat 1 is not limited to being mounted on an automobile, but can be mounted on a railway vehicle, a ship, an aircraft, or the like. The vehicle seat 1 includes a seat cushion 2 on which an occupant sits, a seat back 3 that serves as a backrest for the occupant, and a headrest 4 that supports the head of the occupant.

  The seat back 3 includes a frame 5, a seat pad 10 supported by the frame 5, and a cover 6 that covers the seat pad 10. Similarly, the seat cushion 2 and the headrest 4 are formed by covering a seat pad supported by the frame. The frame 5 is a member made of a metal such as steel or a synthetic resin having predetermined rigidity and strength.

  The cover 6 is a soft member mainly composed of fabric, synthetic leather, leather, or the like. The cover 6 is fixed by hooking a hook or the like (not shown) to a wire or clip embedded in the seat pad 10.

  The seat back 3 is provided with a metal or synthetic resin hook 20 on the upper right side of the back surface (the front side in FIG. 1). The hook 20 is a member for hooking baggage or the like. The hook 20 includes a rectangular frame-shaped main body portion 21 and a hook portion 22 accommodated in the main body portion 21 in a rear view. The lower part of the hook part 22 is rotatably supported by the lower part of the main body part 21. By rotating the hook portion 22 with respect to the main body portion 21, baggage or the like can be hooked on the hook portion 22 projected from the main body portion 21.

  As shown in FIG. 2, the seat pad 10 includes a pad main body 11 made of a foamed synthetic resin such as a flexible flexible polyurethane foam, and a reinforcing member 12 integrated with a back surface 11 b (see FIG. 4) of the pad main body 11. With. The cover 6 (see FIG. 1) is put on the surface 11a of the pad main body 11. The reinforcing material 12 side of the seat pad 10 contacts the frame 5 (see FIG. 1).

  The reinforcing material 12 is a cloth-like member for suppressing generation of abnormal noise due to friction between the frame 5 and the seat pad 10, tearing of the seat pad 10, and the like, and is made of a nonwoven fabric. The reinforcing material 12 is not limited to being composed of a nonwoven fabric, but can be formed of a coarse blanket, a cold-cold bath, a felt, a woven or knitted fabric, or a laminated composite of these. The reinforcing material 12 may be woven or bonded with a wire such as a synthetic resin or metal. Further, a molded body using these materials or synthetic resins may be used as the reinforcing material 12.

  The seat pad 10 includes a front pad 13 provided on the occupant side (the back side in FIG. 2) and a back pad 14 disposed with the frame 5 (see FIG. 4) between the front pad 13. With. The pad main body 11 of the back pad 14 is provided with a substantially rectangular through hole 15 that penetrates the pad main body 11 from the front surface 11a to the back surface 11b at a position where the hook 20 (see FIG. 1) is provided.

  The reinforcing member 12 includes a blocking portion 16 that closes the through hole 15. The obstruction | occlusion part 16 is provided with the weak part 17 set as a low intensity | strength rather than an adjacent site | part. The fragile portion 17 includes two first fragile portions 17a provided on the linear first virtual line 18, two second fragile portions 17b provided on the linear second virtual line 19, and a first virtual The connecting part 17c provided in the position where the line 18 and the 2nd virtual line 19 cross is provided.

  The 1st weak part 17a and the 2nd weak part 17b are the site | parts which penetrate the obstruction | occlusion part 16 in the cloth thickness direction, and the intensity | strength is 0. The first virtual line 18 and the second virtual line 19 intersect each other vertically, and the first weak part 17a and the second weak part 17b are arranged in a cross shape. In addition, the 1st virtual line 18 and the 2nd virtual line 19 are not restricted to a linear form, It is possible to form the 1st virtual line 18 and the 2nd virtual line 19 in the shape of a curve.

  The blocking part 16 includes divided parts 16a, 16b, 16c, and 16d that are divided by the first fragile part 17a and the second fragile part 17b. The connecting part 17c is a part that connects the corners of the divided parts 16a, 16b, 16c, and 16d. Thereby, it is possible to prevent the corners of the divided portions 16a, 16b, 16c, and 16d from being bent or bent. Moreover, since the connection part 17c is a site | part on the extension line of the linear 1st weak part 17a and the 2nd weak part 17b, intensity | strength is lower than the division parts 16a, 16b, 16c, and 16d.

  Next, a method for manufacturing the seat pad 10 will be described with reference to FIGS. 3 (a) and 3 (b). FIG. 3A is an explanatory diagram showing the pad body 11 before molding, and FIG. 3B is an explanatory diagram showing the pad body 11 after molding. 3A and 3B, the cloth thickness of the reinforcing member 12 is increased and exaggerated for easy understanding (the same applies to FIGS. 4 and 5).

  As shown in FIG. 3A, the seat pad 10 is manufactured using a mold 30. The mold 30 includes a lower mold 31, an upper mold 33 that is rotatably supported by the lower mold 31 with a rotation shaft 32, and a core mold 35 that is attached to the upper mold 33 via a driving device 34. In portions corresponding to the through holes 15 of the pad main body 11, clamping portions 36 and 37 project from the upper mold 33 and the core mold 35 toward each other. The protruding amount of the clamping part 37 protruding from the core mold 35 is set larger than the protruding amount of the clamping part 36 protruding from the upper mold 33.

  The drive device 34 is an actuator such as a hydraulic cylinder, an air cylinder, or an electric cylinder. The drive device 34 includes a cylinder body 34a fixed to the outside of the upper mold 33, a rod 34b protruding from the cylinder body 34a, and a drive unit (not shown) that causes the rod 34b to protrude and retract relative to the cylinder body 34a. . The rod 34b penetrates the upper mold 33 and the core mold 35 is fixed to the tip.

  In order to manufacture the seat pad 10, a holding process for holding the reinforcing material 12 in the mold 30 is performed. In the holding step, first, the core mold 35 is opened in a state where the lower mold 31 and the upper mold 33 are opened and the rod 34b is extended from the cylinder body 34a to separate the upper mold 33 and the core mold 35 from each other. The reinforcing member 12 is held by a magnet or a hook. At this time, the fragile portion 17 of the reinforcing material 12 and its surroundings (the closed portion 16) are opposed to the sandwiching portion 37. Next, the rod 34b is accommodated in the cylinder body 34a, and the upper die 33 and the core die 35 are brought into contact with each other. As a result, the fragile portion 17 of the reinforcing member 12 and the periphery (the closed portion 16) are sandwiched between the sandwiching portions 36 and 37.

  Since the corners of the divided portions 16a, 16b, 16c, and 16d (see FIG. 2) can be prevented from being bent or bent by the connecting portion 17c, confirmation and correction of the bending and bending can be omitted. As a result, the fragile portion 17 and its surroundings can be easily sandwiched by the sandwiching portions 36 and 37, and work efficiency can be improved.

  After the holding process, a molding process for molding the pad body 11 is performed. In the molding process, first, a foaming stock solution that is a material of the pad main body 11 is injected into the lower mold 31. Subsequently, the lower mold 31 and the upper mold 33 are closed by rotating the upper mold 33 around the rotation shaft 32 with respect to the lower mold 31. A cavity 38 is a space formed in the mold 30 when the lower mold 31 and the upper mold 33 are closed.

  Next, as shown in FIG. 3 (b), the pad main body 11 is formed by foaming and curing the foaming stock solution in the cavity 38. After the molding step, the lower mold 31 and the upper mold 33 are opened, the rod 34b is extended from the cylinder body 34a, the upper mold 33 and the core mold 35 are separated, and the molded body is removed from the core mold 35. In this way, the seat pad 10 is obtained.

  The surface 11a of the front pad 13 is molded by the lower mold 31, the surface 11a of the back pad 14 is molded by the upper mold 33, and the back pad 11b of the front pad 13 and the back pad 14 is molded by the core mold 35. The Since the foaming stock solution is impregnated into the reinforcing material 12 made of nonwoven fabric, the back surface 11b of the pad main body 11 and the reinforcing material 12 can be integrated.

  Further, since the sandwiching portions 36 and 37 protrude into the cavity 38, the through hole 15 is formed in the pad main body 11 by the sandwiching portions 36 and 37. Since the fragile portion 17 of the reinforcing material 12 and the periphery thereof are sandwiched between the sandwiching portions 36 and 37, the closed portion 16 that closes the through hole 15 by the reinforcing material 12 is formed.

  In this case, the weakened portion 17 is provided in advance in the closing portion 16 of the seat pad 10 removed from the mold 30. In addition, it is possible to provide the weak part 17 in the obstruction | occlusion part 16 after shaping | molding of the seat pad 10 using tools, such as a cutter knife. However, compared with the reinforcing material 12 alone, the reinforcing material 12 with the pad main body 11 integrated is large and heavy, and is difficult to handle because the shape is specified. However, in this case, since the position of the blocking portion 16 is specified, the fragile portion 17 can be easily provided at a predetermined position.

  On the other hand, in the present embodiment, since the weakened portion 17 is provided in advance at a predetermined position of the reinforcing material 12 before being integrated with the pad main body 11, the handling of the reinforcing material 12 can be simplified, and the reinforcing material 12 It is possible to easily provide the fragile portion 17. The work process can be simplified by sandwiching the reinforcing member 12 provided with the fragile portion 17 in advance between the sandwiching portions 36 and 37 and providing the fragile portion 17 in the closed portion 16.

  Since the protruding amount of the clamping portion 37 is larger than the protruding amount of the clamping portion 36, the blocking portion 16 is arranged on the surface 11 a side of the center of the pad body 11 in the thickness direction (direction from the front surface 11 a to the back surface 11 b). . Further, the reinforcing material 12 connected to the closing portion 16 is integrated with the inner peripheral surface of the through hole 15 on the back surface 11 b side of the closing portion 16.

  When the foaming stock solution is foamed to fill the cavity 38, the foaming stock solution is filled so as to go around from the front pad 13 side of the pad body 11 to the back pad 14 side. Therefore, a void is easily generated on the side of the driving device 34 of the sandwiching portions 36 and 37, and there is a possibility that a molding defect may occur. However, in this embodiment, since the non-woven reinforcing material 12 is sandwiched between the sandwiching portions 36 and 37, the sandwiching reinforcing material 12 is impregnated with the foaming stock solution on the driving device 34 side of the sandwiching portions 36 and 37. The foaming stock solution can be circulated at an early stage. As a result, it is difficult to generate a void on the driving device 34 side of the sandwiching portions 36 and 37, and molding defects can be suppressed. In addition, not only when the reinforcing material 12 is a nonwoven fabric but if the reinforcing material 12 is comprised from the raw material which can be impregnated with a foaming undiluted | stock solution, a shaping | molding defect can be suppressed similarly.

  Next, the receiving member 5a to which the hook 20 is attached will be described with reference to FIG. FIG. 4 is a cross-sectional view of the vehicle seat 1 before the hook 20 is attached. As shown in FIG. 4, a receiving member 5 a to which the hook 20 is attached is fixed to the frame 5. The receiving member 5a is a box-shaped member having one surface opened. The receiving member 5 a is welded to the frame 5. The receiving member 5a is not limited to be welded to the frame 5, and the receiving member 5a may be fixed to the frame 5 with bolts, adhesive, pins, hooks, or the like.

  As for receiving member 5a, the edge of the opened portion is edge 5b. When the seat pad 10 is assembled to the frame 5, the end edge 5 b side of the receiving member 5 a is inserted into the through hole 15 of the pad main body 11. Since the reinforcing member 12 is integrated with the inner peripheral surface of the through hole 15, the receiving member 5 a and the inner peripheral surface of the through hole 15 are rubbed with each other, and the pad main body 11 is scraped or abnormal noise is generated. Can be suppressed.

  The receiving member 5a is provided with a receiving portion 5c that penetrates the bottom surface away from the edge 5b. A fixing portion 23 protruding from the main body portion 21 of the hook 20 is inserted into the receiving portion 5c. Since the dimension of the fixing part 23 is set slightly larger than the dimension of the receiving part 5c, the fixing part 23 is press-fitted into the receiving part 5c, and the hook 20 is fixed to the receiving member 5a. In addition, the dimension of the main-body part 21 and the receiving member 5a is set so that the main-body part 21 contacts the edge 5b of the receiving member 5a in the state in which the fixing | fixed part 23 was press-fit in the receiving part 5c.

  The main body portion 21 of the hook 20 has a curved surface portion 24 having a curved surface with the fixing portion 23 as a vertex. When the hook 20 is fixed to the receiving member 5a, the curved surface portion 24 is accommodated in the receiving member 5a. The vertical spacing of the edge 5b in the vertical direction and the horizontal direction, and the vertical dimension and the horizontal dimension of the curved surface portion 24 on the side away from the fixing portion 23 are set to be substantially the same. Thereby, when the main body portion 21 is inserted into the receiving member 5a, the fixing portion 23 can be guided to the receiving portion 5c such that the end edge 5b slides on the curved surface portion 24. As a result, the hook 20 can be easily attached to the receiving member 5a.

  Next, with reference to FIG. 5 in addition to FIG. 4, a method for manufacturing the vehicle seat 1 (seat back 3) using the seat pad 10 will be described. FIG. 5 is a cross-sectional view of the vehicle seat 1 to which the hook 20 is attached.

  As shown in FIG. 4, first, the seat pad 10 is assembled to the frame 5, and the cover 6 is put on the seat pad 10. Next, the closing part 16 is pushed with the hook 20 while the hook 20 is inserted into the through hole 6 a of the cover 6. As a result, the blocking portion 16 is broken or pushed from the fragile portion 17 as a starting point, and the hook 20 penetrates the blocking portion 16. Next, as shown in FIG. 5, the seat back 3 (vehicle seat 1) is formed by inserting the hook 20 penetrating the closing portion 16 into the through hole 15 of the pad body 11 and attaching the hook 20 to the receiving member 5a. can get.

  As described above, since the blocking portion 16 has the fragile portion 17, by pushing the blocking portion 16, the blocking portion 16 is broken or pushed out from the fragile portion 17, and a hole is easily provided in the blocking portion 16. be able to. Thereby, a work process can be simplified compared with the case where the obstruction | occlusion part 16 is removed using tools, such as a cutter knife. Moreover, since the obstruction | occlusion part 16 is not removed, the dust of the removed part can be eliminated.

  Furthermore, since the closing part 16 can be pushed and penetrated by the hook 20 when the hook 20 is attached, the step of separately providing a hole through which the hook 20 penetrates the closing part 16 can be eliminated. Thus, the work process can be further simplified by performing the attaching work of the hook 20 and the process of providing the hole in the closing portion 16 substantially simultaneously.

  Since the 1st weak part 17a and the 2nd weak part 17b (refer FIG. 2) are each provided in linear form, it can make it easy to tear the obstruction | occlusion part 16 on the extension line. Furthermore, since the first fragile portion 17a and the second fragile portion 17b are provided on the first imaginary line 18 and the second imaginary line 19 that intersect with each other, the first fragile portion 17a and the second fragile portion 17b are different from each other. It is possible to easily spread the blocking portion 16 in the direction. As a result, by providing the first fragile portion 17a and the second fragile portion 17b on the first imaginary line 18 and the second imaginary line 19 that intersect each other, the hole provided in the blocking portion 16 can be easily enlarged.

  In particular, since the connecting portion 17c that connects the corners of the divided portions 16a, 16b, 16c, and 16d (see FIG. 2) is located on the extension line of the first fragile portion 17a and the second fragile portion 17b, the divided portions 16a, 16b , 16c, 16d, the connecting portion 17c is easily broken. When the connecting portion 17c is broken, the two first fragile portions 17a and the two second fragile portions 17b, which are through holes, are connected to each other, so that a large hole can be formed in the center of the closing portion 16. Therefore, the hole provided in the closing part 16 can be enlarged more easily.

  Since the first fragile portion 17a and the second fragile portion 17b are arranged in a cross shape in the rectangular blocking portion 16, two sides of the divided portions 16a, 16b, 16c, and 16d are supported by the pad main body 11, respectively. Thereby, when the hook 20 penetrates the closing part 16, a force toward the center of the closing part 16 and the through hole 15 can be applied to the hook 20 from the divided parts 16 a, 16 b, 16 c, 16 d. As a result, the hook 20 can be easily attached to the receiving member 5a.

  When the fixing portion 23 of the hook 20 is press-fitted into the receiving portion 5c of the receiving member 5a and the hook 20 is attached to the receiving member 5a, the closing portion 16 is formed between the main body portion 21 of the hook 20 and the edge 5b of the receiving member 5a. Is sandwiched. Thereby, since the force which expands the hole of the obstruction | occlusion part 16 (reinforcement material 12) which the hook 20 penetrated can be hardly applied to the obstruction | occlusion part 16 (reinforcement material 12), the reinforcement member 12 ( The blocking part 16) can be hardly broken.

  Further, since the closing portion 16 is sandwiched between the main body portion 21 and the end edge 5b, the pad main body 11, the hook 20, and the receiving member 5a can be hardly moved relative to each other. When the pad main body 11 and the hook 20 and the receiving member 5a easily move relative to each other, the hook 20 and the receiving member 5a push the inner peripheral surface of the through hole 15 of the pad main body 11 by the relative movement, and the through hole 15 starts. In addition, the pad body 11 may be broken. Further, there is a possibility that abnormal noise may be generated due to friction caused by relative movement between the pad main body 11 and the hook 20 and the receiving member 5a. On the other hand, in the present embodiment, the pad main body 11, the hook 20 and the receiving member 5a can be hardly moved relative to each other, so that the pad main body 11 can hardly be broken starting from the through hole 15, and the pad main body 11, the hook 20 and Abnormal noise due to friction with the receiving member 5a can be hardly generated.

  When the hook 20 is inserted into the through-hole 6a of the cover 6 and the hook 20 is attached to the receiving member 5a, the through-hole 6a of the cover 6 is smaller than the through-hole 15; It is sandwiched between the pad main body 11. Therefore, the periphery of the through-hole 6a of the cover 6 can be prevented from being drowned, so that the appearance can be improved. Alternatively, the hook 20 may be attached to the receiving member 5a after the cover 6 is put on the seat pad 10.

  Next, a second embodiment will be described with reference to FIG. In 1st Embodiment, the case where the cross-shaped weak part 17 was arrange | positioned in the obstruction | occlusion part 16 was demonstrated. On the other hand, 2nd Embodiment demonstrates the case where the obstruction | occlusion part 40 is provided with the T-shaped weak part 41. FIG. In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and the following description is abbreviate | omitted. Fig.6 (a) is a rear view of the obstruction | occlusion part 40 in 2nd Embodiment.

  As shown to Fig.6 (a), the obstruction | occlusion part 40 is provided with the weak part 41 which penetrates the obstruction | occlusion part 40 in the cloth thickness direction. The fragile part 41 is a part set at a lower strength than the adjacent part, and the strength is zero. The fragile portion 41 includes a first fragile portion 44 provided on the first imaginary line 42 and a second fragile portion 45 provided on the second imaginary line 43. The first virtual line 42 and the second virtual line 43 intersect each other vertically, and the first fragile portion 44 and the second fragile portion 45 are arranged in a T shape. The first fragile portion 44 and the second fragile portion 45 are continuous with each other.

  Similarly to the first embodiment, the second embodiment in which the fragile portion 41 is provided in a T-shape can easily open a hole in the closed portion 40 by breaking or pushing the closed portion 40 starting from the fragile portion 41. Can be provided. Thereby, compared with the case where the obstruction | occlusion part 40 is removed using tools, such as a cutter knife, an operation process can be simplified.

  The blocking part 40 includes divided parts 40 a, 40 b, and 40 c that are divided by a T-shaped first weak part 44 and a second weak part 45. The split part 40a is supported by the pad body 11 (see FIG. 1) at three sides, and the split parts 40b and 40c are each supported by the pad body 11 at two sides. Thus, as in the first embodiment, when the hook 20 (see FIGS. 4 and 5) passes through the closing portion 40, the force toward the center of the closing portion 40 and the through hole 15 is divided into the divided portions 40a, 40b, and 40c. Can be applied to the hook 20. As a result, the hook 20 can be easily attached to the receiving member 5a (see FIGS. 4 and 5).

  Here, in the first embodiment in which the first fragile portion 17a and the second fragile portion 17b are not continuous and the corners of the divided portions 16a, 16b, 16c, and 16d are connected by the connecting portion 17c, the connecting portion 17c. It was necessary to give the power to break through first. On the other hand, in 2nd Embodiment, the 1st weak part 44 and the 2nd weak part 45 are mutually connected, and there is no connection part which connects the corner | angular part of division part 40a, 40b, 40c. Therefore, since it is not necessary to give the force which breaks a connection part, the obstruction | occlusion part 40 can be pushed and expanded from the weak part 41 with a smaller force.

  Next, a third embodiment will be described with reference to FIG. In 1st Embodiment, the case where the cross-shaped weak part 17 was arrange | positioned in the obstruction | occlusion part 16 was demonstrated. On the other hand, in 3rd Embodiment, the case where the obstruction | occlusion part 50 is provided with the H-shaped weak part 51 is demonstrated. In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and the following description is abbreviate | omitted. FIG.6 (b) is a rear view of the obstruction | occlusion part 50 in 3rd Embodiment.

  As shown in FIG. 6B, the blocking part 50 includes an H-shaped weak part 51 that is set to be lower in strength than the adjacent part. The fragile portion 51 is provided on the plurality of first fragile portions 55 provided on the first virtual line 52, the plurality of second fragile portions 56 provided on the second virtual line 53, and the third virtual line 54. A plurality of third fragile portions 57 and a plurality of connecting portions 58 respectively disposed between the plurality of first fragile portions 55, the second fragile portions 56 and the third fragile portions 57.

  The 1st weak part 55, the 2nd weak part 56, and the 3rd weak part 57 are linear site | parts which penetrate the obstruction | occlusion part 50 in the cloth thickness direction, and intensity | strength is 0. The first virtual line 52 and the third virtual line 54 are provided in parallel, and the first virtual line 52, the third virtual line 54, and the second virtual line 53 intersect each other perpendicularly. A plurality of second fragile portions 56 are arranged between the first virtual line 52 and the third virtual line 54.

  The blocking portion 50 includes divided portions 50a, 50b, 50c, and 50d that are divided by an H-shaped weak portion 51. Each of the divided portions 50a and 50b is supported by the pad main body 11 (see FIG. 1), and each of the divided portions 50c and 50d is supported by the pad main body 11.

  The connecting portion 58 is a portion that connects the opposing sides of the divided portions 50a, 50b, 50c, and 50d, respectively. Thereby, it can prevent that the division | segmentation part 50a, 50b, 50c, 50d bends or bends. Since the connection part 58 is a part on the extension line of the linear 1st weak part 55, the 2nd weak part 56, and the 3rd weak part 57, it is lower intensity | strength than the division parts 50a, 50b, 50c, 50d.

  As described above, the third embodiment having the H-shaped weak portions 51 in which the first weak portions 55, the second weak portions 56, the third weak portions 57, and the connecting portions 58 are alternately provided in a broken line shape is also described. Similarly to the first embodiment, the blocking portion 50 can be easily provided with a hole by breaking or pushing the blocking portion 50 starting from the fragile portion 51. Thereby, compared with the case where the obstruction | occlusion part 50 is removed using tools, such as a cutter knife, an operation process can be simplified.

  Since the fragile portion 51 is provided in an H shape, when the closing portion 50 is pushed and the connecting portion 58 having a lower strength than the divided portions 50a, 50b, 50c, 50d is broken, only one side is supported by the pad body 11. The division parts 50c and 50d are opened. Thereby, the hole provided in the obstruction | occlusion part 50 can be greatly opened on the both sides of the 2nd weak part 56. FIG. That is, since the fragile portion 51 is provided in an H shape, the hole provided in the closing portion 50 can be enlarged with a small force, so that work efficiency can be improved.

  Moreover, since the division parts 50c and 50d open on both sides of the 2nd weak part 56 arrange | positioned in the center of the left-right direction, the dimension of the division parts 50c and 50d from the inner periphery of the through-hole 15 can be made comparatively large. Accordingly, the split portions 50c and 50d can be easily sandwiched between the hook 20 (see FIG. 5) and the receiving member 5a (see FIG. 5), so that the reinforcing member 12 can be more difficult to break and the pad main body 11 (FIG. 5). Noise) due to friction between the hook 20 and the receiving member 5a.

  Next, a fourth embodiment will be described with reference to FIG. In 1st Embodiment, the case where the weak part 17 was arrange | positioned on two virtual lines orthogonal was demonstrated. On the other hand, in the fourth embodiment, a case where the fragile portion 61 is arranged on five virtual lines will be described. In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and the following description is abbreviate | omitted. FIG.6 (c) is a rear view of the obstruction | occlusion part 60 in 4th Embodiment.

  As shown in FIG.6 (c), the obstruction | occlusion part 60 is provided with the weak part 61 set to a low intensity | strength rather than an adjacent site | part. The weak part 61 includes a first weak part 67 provided on the first virtual line 62, a second weak part 68 provided on the second virtual line 63, and a third weak part provided on the third virtual line 64. 69, the 4th weak part 70 provided on the 4th virtual line 65, the 5th weak part 71 provided on the 5th virtual line 66, the 1st weak part 67, the 3rd weak part 69, and the 2nd weak part And connecting portions 72 disposed between the portions 68.

  The first fragile portion 67, the second fragile portion 68, the third fragile portion 69, the fourth fragile portion 70, and the fifth fragile portion 71 are portions that penetrate the blocking portion 60 in the cloth thickness direction, and the strength is 0. . The first virtual line 62 and the third virtual line 64 are provided in parallel, and the first virtual line 62, the third virtual line 64, and the second virtual line 63 intersect each other perpendicularly. A first imaginary line 62, a second imaginary line 63, and a third imaginary line 64 are provided in parallel to each side of the substantially rectangular blocking portion 60, and a fourth imaginary line 65 and a fifth imaginary line 66 are substantially omitted. It is provided on a diagonal line of the rectangular blocking portion 60.

  A second fragile portion 68 is provided extending vertically in the center of the blocking portion 60, and a first fragile portion 67 and a third fragile portion 69 are provided on both ends of the second fragile portion 68. At both ends of the first fragile portion 67 and the third fragile portion 69, end portions of the fourth fragile portion 70 and the fifth fragile portion 71 are continuously provided.

  The blocking part 60 includes divided parts 60a, 60b, 60c, and 60d that are divided by a first fragile part 67, a second fragile part 68, a third fragile part 69, a fourth fragile part 70, and a fifth fragile part 71. Each of the divided portions 60a, 60b, 60c, and 60d is supported by the pad main body 11 (see FIG. 1).

  The connecting part 72 is a part that connects the corners of the dividing parts 60c and 60d to the dividing parts 60a and 60b, respectively. Thereby, it can prevent that the division parts 60a, 60b, 60c, and 60d are curled or bent. Since the connection part 72 is a part on the extension line of the linear 2nd weak part 68, it is lower intensity | strength than the division parts 60a, 60b, 60c, 60d.

  As in the first embodiment, the fourth embodiment in which the fragile portion 61 is provided as described above easily breaks or spreads the blocking portion 60 starting from the fragile portion 61, and easily forms a hole in the blocking portion 60. Can be provided. Thereby, a work process can be simplified compared with the case where the obstruction | occlusion part 60 is removed using tools, such as a cutter knife.

  When the closing portion 60 is pushed and the easily ruptured connecting portion 72 on the extension line of the second fragile portion 68 is broken, the divided portions 60a, 60b, 60c, 60d whose one side is supported by the pad body 11 are opened. Thereby, the hole provided in the closing part 60 can be made substantially the same size as the through hole 15. Therefore, since the hole provided in the closing part 60 can be enlarged with a small force, the working efficiency can be improved.

  Next, a fifth embodiment will be described with reference to FIG. In 1st Embodiment, the case where the cross-shaped weak part 17 was arrange | positioned to the rectangular-shaped obstruction | occlusion part 16 was demonstrated. On the other hand, in the fifth embodiment, a case will be described in which an X-shaped fragile portion 81 is arranged in a rectangular blocking portion 80. In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and the following description is abbreviate | omitted. FIG.6 (d) is a rear view of the obstruction | occlusion part 80 in 5th Embodiment.

  As shown in FIG. 6D, the blocking portion 80 includes a fragile portion 81 that is set to have a lower strength than an adjacent portion. The fragile portion 81 includes a plurality of first fragile portions 84 provided on the first virtual line 82, a plurality of second fragile portions 85 provided on the second virtual line 83, a plurality of first fragile portions 84 and first And a plurality of connecting portions 86 disposed between the two fragile portions 85.

  The 1st weak part 84 and the 2nd weak part 85 are the circular site | parts which penetrate the obstruction | occlusion part 80 in the cloth thickness direction, and the intensity | strength is 0. The first imaginary line 82 and the second imaginary line 83 are provided on a diagonal line of the substantially rectangular blocking portion 80. Thereby, the 1st weak part 84 and the 2nd weak part 85 are arrange | positioned with respect to the substantially rectangular obstruction | occlusion part 80 in X shape.

  The blocking portion 80 includes divided portions 80a, 80b, 80c, and 80d that are divided by an X-shaped weak portion 81. Each of the divided portions 80a, 80b, 80c, and 80d is supported by the pad main body 11 (see FIG. 1).

  The connecting portion 86 is a portion that connects the opposing sides of the divided portions 80a, 80b, 80c, and 80d. Thereby, it can prevent that the division parts 80a, 80b, 80c, and 80d are curled or bent. Since the connection part 86 is a part between the 1st weak part 84 and the 2nd weak part 85, it is easy to tear from the 1st weak part 84 and the 2nd weak part 85, and rather than the division parts 80a, 80b, 80c, 80d Low strength.

  As described above, the fifth embodiment having the X-shaped fragile portions 81 in which the first fragile portions 84 and the second fragile portions 85 and the connecting portions 86 are alternately provided in a broken line shape is also the same as the first embodiment. In addition, it is possible to easily provide a hole in the closed portion 80 by breaking or pushing the closed portion 80 starting from the fragile portion 81. Thereby, compared with the case where the obstruction | occlusion part 80 is removed using tools, such as a cutter knife, an operation process can be simplified.

  Since the fragile portion 81 is provided in an X shape, when the closing portion 80 is pushed and the connecting portion 86 having a lower strength than the divided portions 80a, 80b, 80c, and 80d is broken, only one side is supported by the pad body 11. Dividers 80a, 80b, 80c, and 80d are opened. Thereby, the hole provided in the blocking portion 80 can be made approximately the same size as the through hole 15. Therefore, since the hole provided in the closing part 80 can be enlarged with a small force, the working efficiency can be improved.

  Next, a sixth embodiment will be described with reference to FIG. In 1st Embodiment, the case where the weak part 17 was provided in the obstruction | occlusion part 16 in the linear form was demonstrated. In contrast, in the sixth embodiment, a case where the fragile portion 91 is provided in a circular shape in the closing portion 90 will be described. In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and the following description is abbreviate | omitted. FIG. 6E is a rear view of the closing portion 90 in the sixth embodiment.

  As shown in FIG. 6E, the closing portion 90 includes a circular weak portion 91 in the center. The fragile portion 91 is made of a nonwoven fabric, and the closing portion 90 other than the fragile portion 91 is made of a woven or knitted fabric. Thereby, the weak part 91 is set to be lower in strength than the adjacent parts.

  In addition, not only in this case, for example, the fragile portion 91 is composed of only a nonwoven fabric, and the blocking portion 90 other than the fragile portion 91 is composed of a nonwoven fabric in which a wire such as a synthetic resin or metal is woven or bonded, etc. It is possible to configure the fragile portion 91 with a material having lower strength than other portions. Moreover, the weak part 91 and the other obstruction | occlusion part 90 are comprised from the same raw material, and make the cloth thickness of the weak part 91 thinner than the cloth thickness of the adjacent site | part (occlusion part 90 other than the weak part 91). Thus, it is possible to set the fragile portion 91 at a lower strength than the adjacent portions.

  In the sixth embodiment, when the blocking portion 90 is pushed, the fragile portion 91 is torn, and further, the blocking portion 90 is torn or expanded from the fragile portion 91 as a starting point, and a hole is easily provided in the blocking portion 90. Can do. Thereby, similarly to 1st Embodiment, compared with the case where the obstruction | occlusion part 90 is removed using tools, such as a cutter knife, an operation process can be simplified.

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. Can be easily guessed. For example, the shape of the seat pad 10, the frame 5, the receiving member 5a, the hook 20, the closing portions 16, 40, 50, 60, 80, 90, the weak portions 17, 41, 51, 61, 81, 91, etc. is an example. It is natural to adopt various shapes. For example, the fragile portion 91 can be formed in a polygonal shape, an elliptical shape, or an oval shape.

  In the first embodiment, the case where the pad main body 11 is made of foamed synthetic resin such as elastic flexible polyurethane foam has been described. However, the present invention is not necessarily limited to this, and the material of the pad main body 11 is appropriately selected. It can be changed. Examples of materials other than the foamed synthetic resin include, for example, those obtained by curing (bonding) fibers made of synthetic resin with a binder such as urethane, and those obtained by melting synthetic resin fibers by heat and welding them together. Can be mentioned.

  In the first embodiment, the case where the through hole 15 for attaching the hook 20 to the back surface of the seat back 3 is provided in the pad main body 11 and the through hole 15 is closed by the closing portion 16 has been described. It is not something that can be done. Of course, the present invention can be applied to a through hole provided in the pad main body 11 in order to provide an armrest, an air bag, and the like. Further, the present invention can be applied not only to the through hole of the pad main body 11 of the seat back 3 but also to the through hole provided in the pad main body of the seat cushion 2. In addition, as a through-hole of the pad main body of the seat cushion 2, the through-hole for providing a walk-in lever and an airbag is mentioned, for example.

  Even when the present invention is applied to other than the through hole for attaching other than the hook 20, it is preferable to insert a member (insertion member) to be inserted into the through hole from the front surface side to the back surface side of the pad main body. When the insertion member is inserted from the back surface side of the pad main body to the front surface side, the closed portion pushed and broken by the insertion member jumps out to the outside of the vehicle seat 1 and looks bad. On the other hand, by inserting the insertion member from the front surface side to the back surface side of the pad main body, the closed portion that is pushed and torn by the insertion member can be accommodated inside the vehicle seat 1, and the appearance can be improved.

  In addition, the closing part that is pushed and torn by the insertion member is sandwiched between the insertion member and the receiving member for fixing the insertion member to the frame so that the closing part 16 is sandwiched between the hook 20 and the receiving member 5a. It is possible. Thereby, while being able to make it difficult to tear the obstruction | occlusion part and pad body which were pinched | interposed, generation | occurrence | production of the noise by friction with a pad main body, an insertion member, and a receiving member can be suppressed.

  In addition, it is also possible to constitute without inserting the closing portion between the insertion member and the receiving member. In this case, since the closing portion is pushed by the insertion member and broken, the insertion member can be covered with the broken closing portion. Since the torn closed portion can move relatively freely with respect to the inner peripheral surface of the through hole, the inner peripheral surface of the through hole and the insertion member can hardly be rubbed with each other. As a result, abnormal noise due to friction between the inner peripheral surface of the through hole and the insertion member can be suppressed, and the inner peripheral surface of the through hole can be prevented from being scraped.

  In each of the above embodiments, the case where the entire through-hole 15 is closed with the blocking portions 16, 40, 50, 60, 80, 90 has been described. However, the present invention is not necessarily limited to this, and at least a part of the through-hole 15 is used. Naturally, it is possible to provide a closing portion so as to close the door.

  In the first to fifth embodiments, the case where the weak parts 17, 41, 51, 61, 81 are provided on a plurality of virtual lines has been described. However, the present invention is not necessarily limited to this, and the weak parts are provided on one virtual line. Of course, it is possible to provide a part. In this case, when the weak part is provided on the straight virtual line, it is difficult to break or push the closed part starting from the weak part as compared with the above embodiments. However, by providing the fragile portion on the U-shaped or circular imaginary line, it is possible to easily break or push the closed portion starting from the fragile portion.

  In the first embodiment, the case where the reinforcing material 12 provided with the fragile portion 17 in advance is integrated with the pad main body 11 to form the seat pad 10 is described. However, the invention is not necessarily limited thereto, and the reinforcing material 12 is not necessarily limited thereto. It is naturally possible to provide the fragile portion 17 in the closed portion 16 using a tool such as a cutter knife after the pad body 11 is integrated with the pad main body 11.

  Not only the weak parts 17, 41, 51, 61, 81, 91 described in the above embodiments, the weak parts may be set to have a lower strength than the adjacent parts. Examples of the fragile portion other than the fragile portions 17, 41, 51, 61, 81, 91 include a perforation, a groove in which the surface of the reinforcing material is recessed, and a hollow portion excluding the inside of the reinforcing material. Further, the first fragile portions 17a, 44, 55, 67, the second fragile portions 17b, 45, 56, 68, the third fragile portions 57, 69, the fourth fragile portion 70, and the fifth fragile portion 71 are shown in FIG. Not only the width (dimension perpendicular to each virtual line) shown in FIGS. 6A, 6B, and 6C, the width can be changed as appropriate. For example, it is naturally possible to set a cut having a width of almost 0 as the first fragile portion, the second fragile portion, the third fragile portion, the fourth fragile portion, and the fifth fragile portion.

  Any or all of the above embodiments can be combined with some or all of the other embodiments. Moreover, it is also possible to abbreviate | omit some structures in said each embodiment. For example, the weak parts 17, 41, 61 in the first, second, and fourth embodiments can be arranged in a broken line shape like the weak parts 51, 81 in the third and fifth embodiments. The weak parts 17, 41, 51, 61, 81 in the first to fifth embodiments are made of a material having a lower strength than the adjacent parts like the weak parts 91 in the sixth embodiment, or cloth It is possible to reduce the thickness.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 5 Frame 5a Receiving member 10 Seat pad 11 Pad main body 11a Front surface 11b Back surface 12 Reinforcement material 15 Through-hole 16, 40, 50, 60, 80, 90 Closure part 17,41,51,61,81,91 Fragile Part 18, 42, 52, 62, 82 First virtual line (virtual line)
19, 43, 53, 63, 83 Second virtual line (virtual line)
20 Hook (insertion member)
30 Mold 36, 37 Clamping part 38 Cavity 54, 64 Third virtual line (virtual line)
65 Fourth virtual line (virtual line)
66 Fifth virtual line (virtual line)

Claims (6)

A pad body having a front surface and a back surface;
A reinforcing material integrated with the back surface of the pad body,
The pad body includes a through hole penetrating from the front surface to the back surface,
The reinforcing member includes a blocking portion that closes at least a part of the through hole,
The said pad part is provided with the weak part set as a lower intensity | strength than an adjacent site | part, The seat pad characterized by the above-mentioned. The fragile portions are respectively provided on a plurality of virtual lines,
The seat pad according to claim 1, wherein at least two of the plurality of virtual lines intersect each other. The seat pad according to claim 1 or 2,
A frame on which the seat pad is supported;
An insertion member that passes through the blocking portion and is inserted into the through hole;
The vehicle seat, wherein the frame includes a receiving member to which the insertion member inserted into the through hole is attached.   The vehicle seat according to claim 3, wherein the reinforcing member is sandwiched between the insertion member and the receiving member in a state where the insertion member is attached to the receiving member. A manufacturing method of a seat pad for manufacturing a seat pad in which a reinforcing material is integrated on the back surface of the pad body,
A holding step for holding the reinforcing material in a mold;
A molding step in which a material is put into a cavity of the mold in which the reinforcing material is held, the pad body is molded, and the pad body and the reinforcing material are integrated.
The reinforcing material includes a fragile portion that is set to be lower in strength than an adjacent portion,
The method of manufacturing a seat pad according to claim 1, wherein the mold includes a pinching portion that protrudes into the cavity and sandwiches the weakened portion and its periphery in the holding step. The pad main body is made of a foamed synthetic resin formed by foaming and curing a foaming stock solution in the cavity of the mold,
6. The method of manufacturing a seat pad according to claim 5, wherein the reinforcing material is made of a material that can be impregnated with the foaming stock solution.

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