Deburring jig and method for producing seat pad
The burr-removing jig with a rigid and elastic body design addresses the inefficiency of manual burr removal in soft seat pads by allowing simultaneous and complete burr extraction, enhancing manufacturing efficiency and reducing labor requirements.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- ARCHEM INC
- Filing Date
- 2025-09-26
- Publication Date
- 2026-06-11
AI Technical Summary
Conventional methods for removing burrs from seat pads with soft elastic bodies, such as foamed polyurethane, are inefficient and labor-intensive, as the periphery of the through-holes is easily deformed, making it difficult to manually remove burrs using existing pressing jigs.
A burr-removing jig comprising a protruding member and a receiving jig with a rigid body and elastic body, designed to simultaneously insert into multiple through-holes, allowing for easy and efficient burr removal by sandwiching and fixing the burrs between the pressing jig and the rigid body, with the elastic body assisting in peeling off the burrs from the through-hole walls.
The jig enables efficient and simultaneous removal of burrs from multiple through-holes, reducing manual labor and ensuring complete burr removal from seat pads, particularly those made of soft elastic materials like foamed polyurethane.
Smart Images
Figure JP2025034225_11062026_PF_FP_ABST
Abstract
Description
Burr-removing jig and method for manufacturing a seat pad
[0001] The present invention relates to a burr-removing jig and a method for manufacturing a seat pad.
[0002] In recent years, the number of seats with SVS (Seat Ventilation System) specifications has been increasing. A large number of through-holes for conducting air are provided in the seat pad for the seat with SVS specifications.
[0003] Conventionally, for the "burrs" formed during the molding of the through-holes, after demolding, the finishing worker inserted a finger into each of the through-holes and manually removed the burrs by scraping, thereby completing the formation of the through-holes. Therefore, in the manufacturing process of the seat pad, a lot of man-hours were required for removing the burrs of the through-holes.
[0004] For example, in the case of burrs such as hard synthetic resin, if a pressing jig is passed through the through-holes, the burrs can be separated from the product without inserting a finger into each of the through-holes, and the man-hours can be reduced (see, for example, Patent Document 1).
[0005] Japanese Patent Laid-Open No. 63-180405
[0006] However, in the case of a seat pad made of foamed polyurethane, which is a soft elastic body, since the periphery of the through-holes is also easily deformed, there is a problem that the burrs cannot be easily removed by the method of Patent Document 1.
[0007] Therefore, an object of the present invention is to provide a burr-removing jig and a method for manufacturing a seat pad that can easily remove burrs.
[0008] The gist of the present invention is as follows. (1) A burr-removing pressing jig composed of a protruding member, and a burr-removing receiving jig having a rigid body portion and a first elastic body connected to the rigid body portion. The burr-removing jig is characterized by comprising these components.
[0009] (2) The deburring jig according to (1), wherein a plurality of the deburring pressing jigs are connected, each of the protruding members is arranged to correspond to a plurality of through holes in the target sheet pad to be deburred, each of the protruding members is insertable into the plurality of through holes simultaneously, and the jig has a plurality of deburring receiving jigs, and each of the rigid body parts and each of the first elastic bodies is configured to be insertable into the through holes.
[0010] (3) A deburring jig characterized by comprising a deburring pressing jig made of a protruding member and a deburring receiving jig which is a second elastic body.
[0011] (4) The deburring jig according to (3), wherein a plurality of the deburring pressing jigs are connected, each of the protruding members has an arrangement corresponding to a plurality of through holes in the target sheet pad to be deburred, each of the protruding members can be inserted into the plurality of through holes simultaneously, and the second elastic body can be arranged to cover one surface of the target sheet pad across the plurality of through holes.
[0012] (5) The deburring jig according to (3) or (4), wherein the second elastic body is a flat plate-shaped member.
[0013] (6) The deburring jig according to (4) or (5), wherein the total length L of the protruding member is longer than the total length r of the through hole.
[0014] (7) The deburring jig according to any one of (4) to (6), wherein the diameter D of the protruding member is less than or equal to the diameter d of the through hole.
[0015] (8) A deburring jig according to any one of (4) to (7), wherein, of the two depths of the through-holes of the target sheet pad, the larger depth is r1 and the smaller depth is r2, and the diameter d of the through-hole is larger than the depth r2.
[0016] (9) A method for manufacturing a sheet pad having a plurality of through holes, characterized in that it includes a step of removing burrs using the deburring jig described in (1) or (2) above.
[0017] (10) A method for manufacturing a sheet pad having a plurality of through holes, characterized in that it includes a step of removing burrs using a deburring jig described in any one of (3) to (8) above.
[0018] According to the present invention, it is possible to provide a deburring jig and a method for manufacturing a sheet pad that can easily remove burrs.
[0019] This is a schematic plan view showing the target sheet pad. This is a diagram showing the deburring process using a conventional deburring jig. This is a schematic perspective view showing an example of a deburring press jig. This is a schematic plan view showing an example of deburring press jigs being connected. This is a schematic cross-sectional view showing a deburring receiving jig according to the first example. This is a diagram showing the deburring process using a deburring jig according to the first embodiment of the present invention. This is a schematic side view showing a deburring receiving jig according to the second example of the present invention. This is a diagram for explaining various dimensions.
[0020] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0021] Figure 1 is a schematic plan view showing a target sheet pad on which a deburring jig according to one embodiment of the present invention is used. This target sheet pad 1 is a sheet pad for SVS specification sheets and has a plurality of through holes 2. The shape, diameter, number, arrangement, etc. of the through holes 2 can vary depending on the specifications. In the illustrated example, the target sheet pad 1 has a total of 18 through holes 2, arranged symmetrically. In the illustrated example, of the 18 through holes 2, 16 through holes 2 are elliptical in plan view and 2 through holes 2 are circular in plan view.
[0022] Figure 2 shows the process of deburring using a conventional deburring jig. For example, when inserting a conventional deburring jig 92 into each through-hole of a sheet pad 90, the burrs 91 sometimes do not completely detach from the wall surface of the through-hole, and remain even after the deburring jig 92 is removed from the through-hole.
[0023] <Deburring Jig> A deburring jig according to one embodiment of the present invention is used to remove burrs 10 from a target sheet pad 1, and comprises a deburring pressing jig 3 and a deburring receiving jig 4a. The configurations of the deburring pressing jig 3 and the deburring receiving jig 4a will be described in detail below.
[0024] <<Deburring Pressing Jig>> Figure 3 is a schematic perspective view showing an example of a deburring pressing jig. Figure 4 is a schematic plan view showing an example of deburring pressing jigs connected together.
[0025] As shown in Figure 3, the deburring press jig 3 consists of a protruding member. The protruding member can be a projection 3a, and has a body portion 3b (cylindrical in this example) and a head portion 3c and a leg portion 3d connected to both ends of the body portion 3b in the extending direction, respectively. In the illustrated example, the head portion 3c is circular in plan view when viewed from above the head portion 3c, and the leg portion 3d is elliptical in plan view when viewed from above the leg portion 3d.
[0026] The projection 3a only needs to be insertable into the through hole 2, and can have various shapes depending on the shape of the through hole 2. Furthermore, the projection 3a can also have a shape that lacks either or both of the head 3c and leg portions 3d (i.e., a shape consisting only of the torso portion 3b). Such various shapes are not particularly limited, but can be molded using a 3D printer or the like.
[0027] As shown in Figure 4, in this example, the connected deburring press jigs 3f are made up of multiple deburring press jigs 3 connected by a plate-shaped connecting member 3e. Each projection 3a has an arrangement corresponding to the multiple through holes 2 in the target sheet pad 1. The multiple through holes 2 in the target sheet pad 1 may have different shapes depending on their position. As already explained, in the example shown in Figure 1, the target sheet pad 1 has 16 elliptical through holes 2 in plan view and 2 circular through holes 2 in plan view. Therefore, as shown in Figure 4, the side that is first inserted into the through hole 2 (the front side in the front-rear direction of Figure 4) is an elliptical leg portion 3d in plan view at the position corresponding to the elliptical through hole 2 in plan view, and a circular head portion 3c in plan view at the position corresponding to the circular through hole 2 in plan view. If there are three or more types of through hole shapes, it is preferable to prepare two or more types of projections 3a to accommodate all shapes.
[0028] With this configuration, each projection 3a can be inserted into multiple through holes 2 simultaneously. That is, each projection 3a can be inserted into the corresponding through hole 2 at the same time for all pairs of projections 3a and through holes 2.
[0029] The material of the projection 3a is not particularly limited, but for example, a resin can be used. Examples of resins include thermoplastic resins and thermosetting resins. Examples of thermoplastic resins include ABS (acrylonitrile butadiene styrene) and PP (polypropylene). Examples of thermosetting resins include EE (epoxy resin).
[0030] <<First Example of a Deburring Jig>> Figure 5 is a schematic cross-sectional view showing a deburring jig according to the first example. Figure 6 is a diagram showing deburring being performed using the deburring jig according to the first embodiment of the present invention.
[0031] As shown in Figure 5, this deburring jig 4a has a rigid body 4b and a first elastic body 4c connected to the rigid body 4b. The deburring jig 4a according to the first example can be connected by a connecting member, although this is not shown in the figure. By connecting multiple deburring jig 4a according to the first example, a jig can be formed having multiple rigid body 4b and multiple first elastic bodies 4c, each connected to the rigid body 4b.
[0032] The rigid body portion 4b can be shaped to correspond to the shape of the through hole 2. For example, if the through hole 2 is cylindrical or elliptical, the rigid body portion 4b can also be cylindrical or elliptical. Such various shapes are not particularly limited, but can be molded using a 3D printer.
[0033] The material of the rigid body 4b is not particularly limited, but for example, a resin can be used. Examples of resins include thermoplastic resins and thermosetting resins. Examples of thermoplastic resins include ABS (acrylonitrile butadiene styrene) and PP (polypropylene). Examples of thermosetting resins include EE (epoxy resin).
[0034] In the illustrated example, the first elastic body 4c is a spring member. The first elastic body 4c can also be a cushion member such as a urethane pad. In the case of a cushion member, the rebound modulus (measurement method is JIS 6400-3) can be, for example, 50% to 80%, and the hardness (measurement method is JIS 6400-2 D method) can be, for example, 147-245 N / φ200.
[0035] The deburring jig according to the first embodiment comprises a deburring pressing jig 3 shown in Figure 3 and a deburring receiving jig 4a shown in Figure 5. The effects and advantages of the deburring jig according to the first embodiment, when using a connected deburring pressing jig 3f and a connected deburring receiving jig, will be described below with reference to Figure 6.
[0036] First, a deburring jig is set on the target sheet pad 1. In the first embodiment, the rigid body portion 4b of the deburring jig 4a is inserted first from the opening of the through hole 2, and the deburring jig 4a is inserted into the through hole 2 until it contacts the burr 10. Regardless of which of the two openings of the through hole 2 is used for insertion, the rigid body portion 4b can be inserted until it contacts the burr 10. Although not shown in the illustration, deburring jig 4a is set in all of the multiple through holes 2. The depth of the burr 10 from the opening can be adjusted by the design of the mold for the target sheet pad 1.
[0037] As shown in the figure, it is preferable that the sum of the total length of the rigid body 4b and the total length of the first elastic body 4c (when no load is applied) is approximately the same as the depth from the burr 10 to the opening.
[0038] Next, the deburring push jig 3 is inserted from the opening on the opposite side from where the deburring receiving jig 4a was inserted.
[0039] In the deburring jig of the first embodiment, the burr 10 is sandwiched and fixed between the deburring pushing jig 3 and the rigid body 4b. Then, as the first elastic body 4c contracts, it moves in the insertion direction of the deburring pushing jig 3. As a result, the burr 10 attempts to peel off from the wall surface of the through hole 2 of the target sheet pad 1 while fixed, so it can be cleanly peeled off from the wall surface of the through hole 2 of the target sheet pad 1 all around. Furthermore, as in this example, when using connected deburring pushing jigs 3f and connected deburring receiving jigs, deburring can be performed on all through holes 2 simultaneously. Thus, the deburring jig of the first embodiment makes it possible to easily remove the burr 10. Moreover, according to the first embodiment, the burr 10 can be easily removed regardless of which of the two openings of the through hole 2 the deburring receiving jig 4a is inserted from.
[0040] <<Second Example of Burr-Removing Receiving Jig>> Fig. 7 is a schematic side view showing a burr-removing receiving jig 5 according to the second example. The burr-removing receiving jig 5 is a second elastic body 5a. In the illustrated example, the second elastic body 5a is a flat plate-like member. Thus, the second elastic body 5a can be arranged to cover one surface of the target sheet pad 1 across a plurality of through holes 2 (all the through holes 2). If such an arrangement is possible, the shape of the second elastic body 5a is not limited to the above example.
[0041] When the second elastic body 5a is a flat plate-like member, its thickness is not particularly limited, but it can be, for example, 2 to 10 cm.
[0042] The material of the second elastic body 5a is not particularly limited, but for example, a soft urethane foam, a fiber elastic body, a thermoplastic elastomer, etc. can be used. Also, urethane chips, urethane foams, etc. can be used. The rebound resilience rate of the second elastic body 5a (the measurement method is JIS6400-3) can be, for example, 20-80%, and the hardness (the measurement method is JIS6400-2 D method) can be, for example, 147-343 N / φ200.
[0043] The burr-removing jig according to the second embodiment of the present invention includes the burr-removing pressing jig 3 shown in Fig. 3 and the burr-removing receiving jig 5 shown in Fig. 7. Fig. 8 is a diagram showing a state of burr removal using the burr-removing jig according to the second embodiment of the present invention. Hereinafter, referring to Fig. 8, the operation and effect of the burr-removing jig according to the second embodiment when using the connected burr-removing pressing jig 3f and the burr-removing receiving jig 5 will be described.
[0044] First, a burr-removing receiving jig is set for the target sheet pad 1. In the second embodiment, among the two openings of the through hole 2, the second elastic body 5a is arranged in the opening with the smaller depth up to the burr 10 so that the second elastic body 5a covers across a plurality of through holes 2 (all the through holes 2).
[0045] Next, the burr-removing pressing jig 3 is inserted from the opening with the larger depth up to the burr 10 among the two openings of the through hole 2.
[0046] According to the burr removing jig of the second embodiment, as the burr removing push jig 3 is inserted into the burr 10, the burr 10 is pushed and fixed so as to sink into the burr receiving jig 5 which is the second elastic body 5a. Therefore, the burr 10 can be neatly peeled off from the entire circumference of the wall surface of the through hole 2 of the target sheet pad 1. Also, when using the connected burr removing push jig 3f and burr receiving jig 5 as in this example, burr removal can be performed simultaneously for all the through holes 2. Thus, the burr 10 can also be easily removed by the burr removing jig 5 of the second embodiment. In the second embodiment, especially since the burr receiving jig 5 is a single simple member, it is also advantageous in terms of cost.
[0047] Various dimensions in the case of the second embodiment will be described. FIG. 9 is a diagram for explaining various dimensions. As shown in FIG. 9, it is preferable that the total length L of the protrusion 3a is longer than the total length r of the through hole 2. This is to more surely ensure that the burr 10 is pushed so as to sink into the burr receiving jig 5 (second elastic body 5a). For the same reason, when the larger depth of the burr 10 existing in each of the plurality of through holes 2 of the target sheet pad 1 from the two openings of the through hole 2 is r1 and the smaller depth is r2, it is preferable to satisfy the following formula 1. (Formula 1) L≧r + 3r2
[0048] Note that the total length L of the protrusion 3a, for example, in the case of the structure having the body portion 3b, the head portion 3c, and the leg portion 3d as shown in FIG. 2, refers to the total length of all of these combined.
[0049] Furthermore, it is preferable that the diameter (maximum diameter) D of the projection 3a is smaller than the diameter (maximum diameter) d of the through hole 2. This is to facilitate the insertion of the projection 3a into the through hole 2. It is preferable that the diameter D of the projection 3a and the diameter d of the through hole 2 satisfy the following formula 2: (Formula 2) d-3 (mm) ≤ D (mm) ≤ d-1 (mm) By setting the diameter D to (d-3) (mm) or more, the effect of peeling the burr 10 from the side wall of the through hole 2 can be enhanced, while by setting the diameter D to (d-1) (mm) or less, the insertion of the projection 3a into the through hole 2 (especially simultaneous insertion into multiple (all) through holes 2) can be facilitated.
[0050] Furthermore, it is preferable that the diameter d of the through hole 2 is larger than the depth r2. This is to ensure that the burr 10 is pressed into the deburring jig, which is the second elastic body 5, as described above.
[0051] <Method for manufacturing a sheet pad> The method for manufacturing a sheet pad according to the first embodiment of the present invention is a method for manufacturing a sheet pad 1 having a plurality of through holes 2, and includes a step of removing burrs using the deburring jig of the first embodiment.
[0052] More specifically, first, the deburring support jig of the first example is set on the target sheet pad 1. In the first embodiment, the deburring support jig 4a is inserted into the through hole 2 until it contacts the burr 10, with the rigid body portion 4b of the deburring support jig 4a being inserted first from one of the two openings of the through hole 2. Although not shown in the illustration, the deburring support jig 4a is set in all of the multiple through holes 2. Next, the deburring push jig 3 is inserted from the opening opposite to the one into which the deburring support jig 4a was inserted.
[0053] In the manufacturing method of the sheet pad according to the first embodiment, the burr 10 is sandwiched and fixed between the deburring press jig 3 and the rigid body 4b. Then, as the first elastic body 4c contracts, it moves in the insertion direction of the deburring press jig 3. As a result, the burr 10 attempts to peel off from the wall surface of the through hole 2 of the target sheet pad 1 while fixed, so it can be cleanly peeled off from the wall surface of the through hole 2 of the target sheet pad 1 all around. Furthermore, as in this example, when connected deburring press jig 3f and connected deburring receiving jig are used, deburring can be performed on all through holes 2 simultaneously. Thus, the manufacturing method of the sheet pad according to the first embodiment allows for easy removal of the burr 10. Moreover, according to the first embodiment, the burr 10 can be easily removed regardless of which of the two openings of the through hole 2 the deburring receiving jig 4a is inserted from.
[0054] A method for manufacturing a sheet pad according to a second embodiment of the present invention is a method for manufacturing a sheet pad 1 having a plurality of through holes 2, and includes a step of removing burrs using a deburring jig of the second embodiment.
[0055] More specifically, first, the deburring receiving jig 5 of the second example is set on the target sheet pad 1. In the second embodiment, the second elastic body 5a is placed in the opening of the through hole 2 that has a smaller depth to the burr 10, so that the second elastic body 5a covers multiple (all) through holes 2. Next, the deburring pushing jig 3 is inserted from the opening of the through hole 2 that has a larger depth to the burr 10.
[0056] According to the manufacturing method of the sheet pad of the second embodiment, as the deburring press jig 3 is inserted, the burrs 10 are pressed into the deburring receiving jig, which is the second elastic body 5a, so that the burrs 10 can be cleanly peeled off from the wall surface of the through hole 2 of the target sheet pad 1 all around. Furthermore, when connected deburring press jig 3f and deburring receiving jig 5 are used, as in this example, deburring can be performed on all through holes 2 simultaneously. Thus, the burrs 10 can also be easily removed by the manufacturing method of the sheet pad of the second embodiment. The second embodiment is also advantageous in terms of cost, in particular, because the deburring receiving jig 5 is a single, simple component.
[0057] Although embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, in the first and second embodiments, connected deburring press jigs 3f are used, and in the first embodiment, connected deburring receiving jigs are used, and in the second embodiment, the second elastic body 5a is made to cover all the through holes 2, so that the burrs 10 are removed from all the through holes 2 at the same time. However, deburring may also be performed on the through holes 2 one by one using a single deburring press jig 3 and a single deburring receiving jig (4a, 5). Various other modifications and changes are possible.
[0058] 1: Sheet pad, 2: Through hole, 3: Deburring press jig, 3a: Projection, 3b: Body, 3c: Head, 3d: Legs, 3e: Connecting member, 3f: Connected deburring press jig, 4a: Deburring receiving jig, 4b: Rigid body, 4c: First elastic body, 5: Deburring receiving jig, 5a: Second elastic body, 10: Burr, 90: Sheet pad, 91: Burr, 92: Deburring press jig
Claims
1. A deburring jig characterized by comprising: a deburring pressing jig consisting of a protruding member; and a deburring receiving jig having a rigid body and a first elastic body connected to the rigid body.
2. The deburring jig according to claim 1, wherein a plurality of the deburring pressing jigs are connected, each of the protruding members has an arrangement corresponding to a plurality of through holes in the target sheet pad to be deburred, each of the protruding members can be inserted into the plurality of through holes simultaneously, and the jig has a plurality of deburring receiving jigs, and each of the rigid body parts and each of the first elastic bodies is configured to be insertable into the through holes.
3. A deburring jig characterized by comprising a deburring pressing jig consisting of a protruding member and a deburring receiving jig which is a second elastic body.
4. The deburring jig according to claim 3, wherein a plurality of the deburring pressing jigs are connected, each of the protruding members has an arrangement corresponding to a plurality of through holes in the target sheet pad to be deburred, each of the protruding members can be inserted into the plurality of through holes simultaneously, and the second elastic body can be arranged to cover one surface of the target sheet pad across the plurality of through holes.
5. The deburring jig according to claim 3 or 4, wherein the second elastic body is a flat plate-shaped member.
6. The deburring jig according to claim 4, wherein the total length L of the protruding member is longer than the total length r of the through hole.
7. The deburring jig according to claim 4, wherein the diameter D of the protruding member is less than or equal to the diameter d of the through hole.
8. The deburring jig according to claim 4, wherein, of the two depths of the burr present in each of the plurality of through holes of the target sheet pad, the larger depth is r1 and the smaller depth is r2, and the diameter d of the through hole is larger than the depth r2.
9. A method for manufacturing a sheet pad having multiple through holes, characterized by including a step of removing burrs using a deburring jig described in claim 1 or 2.
10. A method for manufacturing a sheet pad having multiple through holes, characterized by including a step of removing burrs using a deburring jig as described in claim 3 or 4.