Loom toy

Abstract

The present application provides a loom toy that can be used simply and has high interest compared to the past. A loom toy (1) that uses a plurality of first raw materials (61) and second raw materials (62) combined with the first raw materials (61) to make a fabric, wherein the loom toy (1) is provided with: a stick member (20) capable of erecting a plurality of columns of the first raw materials (61); and a loom main body (10) capable of holding the stick member, a plurality of raw material holding grooves (25) are provided on the outer peripheral surface of the stick member, the plurality of raw material holding grooves (25) accommodate the first raw materials (61), and are arranged along the axial direction of the stick member (20), and the raw material holding grooves (25) include a plurality of groove portions (25a, 25b) that differ in width in the axial direction.

Description

Technical Field

[0001] This invention relates to a loom toy. Background Technology

[0002] Previously, as a loom toy, Patent Document 1 disclosed a structure having a heddle threading section and a pair of weave width fixing bars, etc. The heddle threading section has multiple slots for the warp yarns to pass through and is rotatably arranged, and the pair of weave width fixing bars are formed into bars and a portion of them are inserted into the slots to maintain the width of the fabric being produced.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2019-180825 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] In the loom toy described in Patent Document 1, there are many components used to operate the loom toy, such as the heddle threading part and the weaving width fixing bar. In addition, the method of assembling these components also results in a structure with a special construction. Therefore, it contains elements that are relatively difficult, especially for young children. Furthermore, structurally, it is impossible to use a wide variety of yarns, and the types of items that can be woven are also limited, which presents a challenge in terms of enjoyment.

[0008] The purpose of this invention is to provide a loom toy that is simple to use and more fun than previous ones.

[0009] Solution for solving the problem

[0010] This invention relates to a loom toy, which uses a plurality of first raw materials and a second raw material combined with the first raw materials to produce fabric, characterized in that...

[0011] This loom toy features:

[0012] Rod components capable of supporting multiple rows of the first raw material; and

[0013] The main body of the loom, which is capable of holding the bar components.

[0014] The outer circumferential surface of the rod member is provided with a plurality of raw material holding grooves, which accommodate the first raw material and are arranged along the axial direction of the rod member.

[0015] The raw material holding groove includes various grooves with different widths along the axial direction.

[0016] Alternatively, in the loom toy of the present invention, it could also be...

[0017] The plurality of grooves includes: a first groove having a first width and a first depth; and

[0018] The second groove is narrower than the first width and has a second depth that is deeper than the first depth.

[0019] Alternatively, in the loom toy of the present invention, it could also be...

[0020] The second groove is disposed within the first groove.

[0021] Alternatively, in the loom toy of the present invention, it could also be...

[0022] The axial spacing of the second groove is smaller than the axial spacing of the first groove.

[0023] Alternatively, in the loom toy of the present invention, it could also be...

[0024] The rod member includes: a first rod member supported at a predetermined position; and a second rod member that can be supported at multiple positions in a manner that allows for changes in the distance between it and the first rod member.

[0025] Alternatively, in the loom toy of the present invention, it could also be...

[0026] The main body of the loom includes:

[0027] The first locking groove holds the first rod member;

[0028] The second and third locking slots hold the second rod member in a parallel state with a predetermined interval from the first rod member; and

[0029] A connecting slot, which connects the second locking slot and the third locking slot.

[0030] The distance between the first locking groove and the third locking groove is greater than the distance between the first locking groove and the second locking groove.

[0031] The second rod component is able to be locked in the third locking groove through the connecting groove.

[0032] Alternatively, in the loom toy of the present invention, it could also be...

[0033] The second locking groove is provided with a loading and unloading opening for loading and unloading the second rod component.

[0034] Alternatively, in the loom toy of the present invention, it could also be...

[0035] The second locking groove and the third locking groove include a first anti-detachment groove, which extends toward the first locking groove to prevent the second rod member from detaching.

[0036] Alternatively, in the loom toy of the present invention, it could also be...

[0037] The first locking groove includes a second anti-detachment groove, which extends toward the second locking groove to prevent the first rod member from detaching.

[0038] Alternatively, in the loom toy of the present invention, it could also be...

[0039] The bar component is rotatably supported on the loom body.

[0040] A protrusion is provided at at least one end of the rod member.

[0041] Alternatively, in the loom toy of the present invention, it could also be...

[0042] The loom toy also includes a raw material passing component for passing the second raw material between the first raw materials.

[0043] A through hole is provided at the end of the raw material penetrating member for the second raw material to pass through.

[0044] A notch is provided on the inner periphery of the through hole.

[0045] The effects of the invention

[0046] According to the present invention, a loom toy that is simpler to use and more fun than conventional ones can be provided. Attached Figure Description

[0047] Figure 1 This is a perspective view showing an example of a loom toy according to the present invention.

[0048] Figure 2 yes Figure 1 An enlarged 3D view of the main parts of the loom toy shown.

[0049] Figure 3 yes Figure 2 The bar member shown is a cross-sectional view along the axial direction.

[0050] Figure 4 It means Figure 2 A side view of the inner surface of the bar retaining frame of the loom body shown.

[0051] Figure 5 It means Figure 1 A three-dimensional diagram showing an example of a loom toy in a play state.

[0052] Figure 6 This is a cross-sectional view showing a deformed example of a rod component.

[0053] Figure 7 This is a side view of the inner structure of a modified example of a rod retaining frame.

[0054] Figure 8 It is an enlarged view of the raw material penetrating the component and a three-dimensional view of the modified example.

[0055] Explanation of reference numerals in the attached figures

[0056] 1. Loom toy; 10. Loom body; 20. Rod component; 21. First rod component; 22. Second rod component; 25. Raw material holding groove; 25a. First groove (raw material holding groove); 25b. Second groove (raw material holding groove); 29. ​​Protrusion; 31. First locking groove; 32. Second locking groove; 32a. Loading / unloading opening; 33. Third locking groove; 35. Connecting groove; 38. First anti-detachment groove; 39. Second anti-detachment groove; 40. Shuttle (raw material passing component); 44. End; 45. Through hole; 48. Cut groove; 61. First raw material; 62. Second raw material. Detailed Implementation

[0057] The following is for reference Figures 1 to 8 A loom toy according to one embodiment of the present invention will be described. Furthermore, regarding the orientation described in this embodiment, front and back, and up and down refer to the toy's play states (see [reference]). Figure 5 The front and back, up and down, and left and right refer to the left and right sides when the player is looking at the toy from the side.

[0058] Figure 1 This is a perspective view showing an example of a loom toy according to this embodiment.

[0059] like Figure 1 As shown, the loom toy 1 includes: a first rod member 21 and a second rod member 22, which, for example, can support multiple rows of ring-shaped first raw material 61 (see reference). Figure 5 The loom body 10 holds the two bar components 21 and 22 in a parallel configuration. Additionally, as an accessory component, it includes a shuttle 40 for mounting the second raw material 62 (see reference). Figure 5 The second raw material 62 is passed between the first raw material 61; and the comb-shaped component 50, etc., is used to press the second raw material 62, which is passed between the first raw material 61, in a specified direction (the woven side).

[0060] Figure 2 yes Figure 1Enlarged perspective view of the loom body 10 and rod components 21 and 22 of the loom toy 1 shown.

[0061] The loom body 10 is a rectangular frame member in plan view, consisting of a pair of left and right bar holding frames 11 that can hold two bar members 21 and 22, a front frame 12 that serves as the front side during operation, and a rear frame 13. On the left and right bar holding frames 11, a pair of left and right first locking grooves 31, a pair of left and right second locking grooves 32, a pair of left and right third locking grooves 33, and a pair of left and right fourth locking grooves 34 are provided on opposite inner surfaces of the left and right bar holding frames 11. These locking grooves 31, 32, 33, and 34 are configured to hold the protruding support shafts 20a of the first bar member 21 and the second bar member 22 in a way that allows for easy loading, unloading, and rotation.

[0062] In this embodiment, the first rod member 21 and the second rod member 22 are configured with the same shape. In the following description, the member that engages with the foremost first locking groove 31 will be referred to as the first rod member 21, and the member that engages with the second locking groove 32, the third locking groove 33, and the fourth locking groove 34 will be referred to as the second rod member 22. Alternatively, when it is not necessary to distinguish between the first and the second, it will simply be referred to as "rod member 20" for description.

[0063] like Figure 2 As shown, the bar member 20 is a cylindrical member with multiple annular raw material holding grooves 25. The raw material holding grooves 25 are formed at equal intervals along the axial direction of the bar member 20, and can accommodate the annular first raw material 61 during fabric production. That is, it forms a structure in which multiple rows of the first raw material 61 are arranged between the first bar member 21 and the second bar member 22 disposed on the loom body 10 (see reference). Figure 5 ).

[0064] Figure 3 This is a cross-sectional view of the axial portion of the bar member 20.

[0065] like Figure 3 As shown, the raw material holding groove 25 of the rod member 20 has multiple grooves with different widths in the axial direction, namely a first groove 25a and a second groove 25b. The first groove 25a is configured to be wider and shallower than the second groove 25b. Furthermore, the second groove 25b is formed by increasing the depth within the first groove 25a. That is, the raw material holding groove 25 is configured as a single groove with two groove widths using a stepped structure. Therefore, in the first raw material 61, the wider first raw material 61a is held by the first groove 25a, while the narrower first raw material 61b is held by the second groove 25b.

[0066] In addition, the portion of the rod member 20 adjacent to the support shaft portions 20a at both ends is provided, for example, with four protrusions 29 that protrude radially from other portions at equal intervals in the circumferential direction (see reference). Figure 2 As will be described later, the protrusion 29 is a structure used to rotate the bar member 20 when the bar member 20 is mounted on the loom body 10.

[0067] Furthermore, the first raw material 61 used herein is depicted as a rectangular and elongated ring shape, but it is not necessarily limited to this shape. Additionally, the first raw material 61 is not particularly limited, but in this embodiment, it is made of a raw material that has a certain degree of elasticity and is capable of stretching.

[0068] Figure 4 It means Figure 2 A side view of the inner surface of the bar holding frame 11 of the loom body 10 shown.

[0069] As described above, a pair of rod retaining frames 11 are provided with locking slots 31, 32, 33, and 34 that are open on their inner surfaces in a relatively paired manner. Thus, the second locking slot 32, the third locking slot 33, and the fourth locking slot 34 can hold the second rod member 22 in parallel with the first rod member 21 held in the first locking slot 31.

[0070] like Figure 4 As shown, the first locking groove 31 includes: a vertical groove 31b, which is formed at the foremost side and extends vertically; and a second anti-detachment groove 39, which is a horizontal groove extending from the middle of the vertical groove 31b towards the second locking groove 32. The vertical groove 31b has a loading and unloading opening 31a for loading and unloading the support portion 20a of the first rod member 21 from above. The second anti-detachment groove 39 is a portion that prevents the support portion 20a from detaching when the first rod member 21 is installed, by using the upper and lower groove walls and the semi-circular end 39a on the rear side to restrict the position of the support portion 20a and hold the support portion 20a. That is, in the play state of the toy, the first rod member 21 is pulled rearward by the first raw material 61 and held in the second anti-detachment groove 39.

[0071] The second locking groove 32 includes: a vertical groove 32b formed along the vertical direction; and a first anti-detachment groove 38, which is a horizontal groove extending from the middle of the vertical groove 32b toward the first locking groove 31. The vertical groove 32b is provided with a loading and unloading opening 32a for loading and unloading the support portion 20a of the second rod member 22 from above.

[0072] The third locking groove 33 is positioned furthest from the first locking groove 31. This third locking groove 33 includes a vertical groove 33b formed along the vertical direction, and a first anti-detachment groove 38, which is a horizontal groove extending from the midpoint of the vertical groove 33b towards the first locking groove 31. The second locking groove 32 and the third locking groove 33 are connected by a connecting groove 35 extending along the front-rear direction below the first anti-detachment groove 38. Furthermore, since no loading / unloading opening is provided in the third locking groove 33, the connecting groove 35 is used when the support shaft portion 20a is housed in the third locking groove 33.

[0073] The fourth locking groove 34 is positioned closest to the first locking groove 31. The fourth locking groove 34 includes a vertical groove 34b formed along the vertical direction, and a first anti-detachment groove 38, which is a horizontal groove extending from the lower end of the vertical groove 34b towards the first locking groove 31. Furthermore, the vertical groove 34b is provided with a loading / unloading opening 34a for loading and unloading the support shaft portion 20a from above.

[0074] Figure 5 It means Figure 1 A perspective view of an example of the play state of the loom toy 1 shown.

[0075] When making fabric using the loom toy 1, such as Figure 5 As shown, firstly, a ring-shaped first raw material 61 is placed on the first rod member 21 and the second rod member 22. A weaving operation, in which the second raw material 62 is combined by alternating up-and-down passes through the first raw material 61, is then performed relative to this placed first raw material 61. For example, as shown in the illustration, during the weaving operation of the second raw material 62, a shuttle 43 (40) through which the second raw material 62 passes is used, so that the second raw material 62 passes through the upper portion (the upper portion of the ring-shaped first raw material 61) arranged side-by-side in an alternating up-and-down position. The shuttle 43 (40) can also hook a portion of the second raw material 62 onto a portion of the shuttle. Figure 5 In that state, the second raw material 62 can also be pre-wound along the length of the shuttle 43 (40), and while unwinding the wound second raw material 62, the second raw material 62 can be combined with the first raw material 61 by alternating up and down passes.

[0076] Then, after weaving to a certain extent, the comb teeth of the comb-like member 51 are inserted between the first raw material 61, and the second raw material 62 is pressed towards the first bar member 21 to reduce the spacing of the assembly. Additionally, while weaving to a certain extent, for example, the protrusion 29 is operated to rotate the first bar member 21 and the second bar member 22 (in the figure, counterclockwise). This rotation allows the woven portion to move towards the lower (inner) side of the first raw material 61, ensuring a secure working area for continued weaving.

[0077] After the second raw material 62 has been woven around the entire circumference of the first circular raw material 61, the second bar member 22 and the first bar member 21 are removed, for example. Then, the ends of the second raw material 62 are appropriately treated to obtain a circular fabric. In addition, if necessary, the obtained circular fabric can be appropriately treated, for example, by closing one end, to finish it into a fabric other than a circular fabric.

[0078] Here, in Figure 5 In the case shown, the second bar member 22 is held in the position of the second locking groove 32. However, for example, the same first raw material 61 can be used to hold the second bar member 22 in the position of the third locking groove 33 and perform the same weaving operation. In this case, compared with... Figure 5 Compared to the case shown, the gap between the first bar member 21 and the second bar member 22 is larger, and more of the second raw material 62 is used. In addition, since the first raw material 61 is woven relative to a more stretched state, the resulting fabric can achieve a fabric where the first raw material 61 shrinks.

[0079] Furthermore, while holding the second rod member 22 in the position of the third locking groove 33, the second rod member 22 can be removed using the self-loading / unloading opening 32a of the connecting groove 35 when removing the second rod member 22. This allows for... Figure 5 Removal was carried out under the same conditions as shown, rather than under conditions where the first raw material 61 was stretched to a greater extent, which reduced the risk of rebound caused by the elastic force of the first raw material 61.

[0080] Figure 6 (a) is a cross-sectional view showing a deformed example of the rod member 20. Figure 6 (b) is a cross-sectional view showing another variation of the rod member 20.

[0081] Figure 6 The rod member 20 shown in (a) and Figure 3 The rod member 20 shown is different; it is a structure in which the first groove 25a and the second groove 25b are alternately formed in the axial direction.

[0082] In the case of this structure, with Figure 3 The same applies to the case shown. In addition to producing fabrics using either the wide first raw material 61a or the narrow first raw material 61b, it is also possible to produce fabrics using both the wide first raw material 61a and the narrow first raw material 61b.

[0083] In addition, Figure 6 In the rod member 20 shown in (b), with Figure 3 The raw material holding groove 25 shown is the same, and the raw material holding groove 25 is alternately arranged in the axial direction with a groove that is constructed in a stepped manner with two groove widths and a groove corresponding to the narrow first raw material 61b.

[0084] In this case, the spacing P1 of the grooves of the narrow-width first raw material 61b is smaller than the spacing P2 of the grooves of the wide-width first raw material 61a. Therefore, it is possible to produce fabrics that further diversify the arrangement of the first raw material 61.

[0085] Figure 7 (a) is a side view of the inner structure of the bar retaining frame, showing a modified example of the retaining structure of the bar members 20 (21, 22) in the loom body 10. Figure 7 (b) is a side view of the inner structure of the rod retaining frame 11, which is another variation of the retaining structure of the rod member 20.

[0086] exist Figure 7 In the rod holding frame 11 shown in (a), with Figure 4 The configuration shown has the same locking slots 31, 32, 33, and 34, which are substantially the same structure, but the second locking slot 32, the third locking slot 33, and the fourth locking slot 34 are connected by a connecting slot 35. Furthermore, the mounting and dismounting of the support shaft portion 20a relative to the second locking slot 32, the third locking slot 33, and the fourth locking slot 34 is configured to be performed only at the mounting and dismounting opening 34a closest to the first locking slot 31.

[0087] exist Figure 7 In the rod holding frame 11 shown in (b), each locking groove 31, 32, 33, and 34 is an independent groove structure, and the height (h2, h3, h4) of the holding position of the support portion 20a of the second rod member 22 is configured to be higher towards the rear (h1 < h2 < h3 < h4). Therefore, during the weaving operation of the second raw material 62, the first raw material 61 is tilted lower towards the front, making it easier to observe from the player's front side and thus easier to operate.

[0088] Figure 8 (a) is an enlarged perspective view of a variant of shuttle 43 (40). Figure 8 (b) is an enlarged perspective view of a modified example of shuttle 43 (40).

[0089] Figure 8 The shuttle 43 shown in (a) is... Figure 5 The shuttle 43 shown is an enlarged version, with through holes 45 at both ends 44 for the second raw material 62 to pass through. These through holes 45 are... Figure 1 The shuttle 42 shown is different; it has a slit structure and is configured with a larger diameter. Furthermore, a slit groove 48 is provided on the inner periphery of the through hole 45, which cuts in along the length direction of the shuttle 43.

[0090] With the shuttle 43 configured in this way, it is possible to produce fabrics using decorative materials such as relatively wide, flat ribbons as the second raw material 62b. For example, by hooking the wide, ribbon-shaped second raw material 62b into the cut groove 48, the wide, ribbon-shaped second raw material 62b is held in the cut groove 48, preventing the second raw material 62b from detaching from the through hole 45, and weaving operations can be performed in this state. Furthermore, when the second raw material 62 is pre-wound along the length of the shuttle 43, the winding operation can also be performed while preventing the second raw material 62b from detaching from the through hole 45.

[0091] At this time, when a hook portion 49 with a slightly varying cut width is formed on the edge side of the cut groove 48 near the through hole 45, the second raw material 62b (62) can be further suppressed from detaching from the through hole 45 by the hook portion 49.

[0092] Figure 8 The shuttle 43 shown in (b) has a through hole 45 with a cut groove 48 on one end side, the cut groove 48 having no hook part 49, and a through hole 45 without the cut groove 48 on the other end side.

[0093] In a structure with a large circular through hole 45, relatively coarse materials such as T-shirt yarn can be used as the second raw material 62c.

[0094] Compared to the coarser second raw material 62c, when using a finer second raw material 62, for example, it is possible to use... Figure 1 The finer needle-shaped shuttle 41 is shown. This finer shuttle 41 can be used in the final stages of finishing the woven fabric.

[0095] As described above, in the loom toy 1 of this embodiment, the raw material holding groove 25 on the outer peripheral surface of the bar member 20 has a variety of grooves with different widths in the axial direction. Therefore, it is possible to use one bar member 20 to handle multiple first raw materials 61.

[0096] In the loom toy 1 of this embodiment, the raw material holding groove 25 has a narrow second groove 25b provided in the wide first groove 25a. Therefore, multiple first raw materials 61 can be handled by using groove structures of the same shape.

[0097] Furthermore, in the loom toy 1 of this embodiment, when the arrangement spacing P2 of the wide first groove 25a in the axial direction is changed and the arrangement spacing P1 of the narrow second groove 25b is changed, the arrangement quantity of the first raw material 61 can be changed.

[0098] In the loom toy 1 of this embodiment, since the second rod member 22 is supported so that the distance between it and the first rod member 21 can be changed, the first raw material 61 of different sizes can be used.

[0099] In the loom toy 1 of this embodiment, the second locking groove 32 and the third locking groove 33 that can hold the second rod member 22 in place are connected by a connecting groove 35. Therefore, the two locking grooves 32 and 33 can be moved between each other by using the connecting groove 35.

[0100] Furthermore, since the second locking groove 32 on the side near the first locking groove 31 is provided with a loading and unloading opening for loading and unloading the second rod member 22, loading and unloading can be performed, for example, when the first raw material 61 is an elastic member, with less elongation of the first raw material 61.

[0101] In the loom toy 1 of this embodiment, the second anti-detachment groove 39 of the first locking groove 31 that holds the first rod member 21 and the first anti-detachment groove 38 of the second locking groove 32, the third locking groove 33 and the fourth locking groove 34 that hold the second rod member 22 are configured to extend in a direction that approaches each other. Therefore, by using the first raw material 61 of the elastic raw material that is mounted between the two rod members 21 and 22, the holding state of the two rod members 21 and 22 is reliably maintained.

[0102] In the loom toy 1 of this embodiment, a protrusion 29 is provided on the outer periphery of the bar member 20, which protrudes radially relative to other parts of the bar member 20. Therefore, the bar member 20 can be rotated by means of the protrusion 29, and the weaving position can be maintained at a predetermined position.

[0103] In the loom toy 1 of this embodiment, when a slit groove 48 is provided on the inner periphery of the through hole 45 at the end 44 of the shuttle 43, a decorative material such as a relatively wide flat ribbon can be used as the second material 62b, and the wide second material 62b in the shape of a ribbon can be passed through the slit groove 48 and held.

[0104] The present invention has been described above as an embodiment of the invention, but the invention can be appropriately modified within the scope of its technical concept. For example, in the above embodiment, the first rod member 21 and the second rod member 22 are configured to have the same structure, but they may not necessarily be the same.

[0105] Furthermore, in the above embodiment, the protrusions 29 are provided at both ends of the rod member 20, but it is also possible for them to be provided only on one side. Regarding the shape of the protrusions 29, it is provided as a structure with four protrusions 29 protruding radially, but it is not limited to the structure shown in the figure and can be appropriately modified.

Claims

1. A loom toy that uses a plurality of first raw materials and a second raw material combined with the first raw materials to make fabric, wherein, This loom toy features: Rod components capable of supporting multiple rows of the first raw material; and The main body of the loom, which is capable of holding the bar components. The outer circumferential surface of the rod member is provided with a plurality of raw material holding grooves, which accommodate the first raw material and are arranged along the axial direction of the rod member. The raw material holding groove includes various grooves with different widths and depths along the axial direction.

2. The loom toy according to claim 1, wherein, The plurality of grooves includes: a first groove having a first width and a first depth; and The second groove has a second width that is narrower than the first width and a second depth that is deeper than the first depth.

3. The loom toy according to claim 2, wherein, The second groove is disposed within the first groove.

4. The loom toy according to claim 2, wherein, The axial spacing of the second groove is smaller than the axial spacing of the first groove.

5. The loom toy according to any one of claims 1 to 4, wherein, The rod member includes: a first rod member supported at a predetermined position; and a second rod member that can be supported at multiple positions in a manner that allows for changes in the distance between it and the first rod member.

6. The loom toy according to claim 5, wherein, The main body of the loom includes: The first locking groove holds the first rod member; The second and third locking slots hold the second rod member in a parallel state with a predetermined interval from the first rod member; and A connecting slot, which connects the second locking slot and the third locking slot. The distance between the first locking groove and the third locking groove is greater than the distance between the first locking groove and the second locking groove. The second rod component is able to be locked in the third locking groove through the connecting groove.

7. The loom toy according to claim 6, wherein, The second locking groove is provided with a loading and unloading opening for loading and unloading the second rod component.

8. The loom toy according to claim 6 or 7, wherein, The second locking groove and the third locking groove include a first anti-detachment groove, which extends toward the first locking groove to prevent the second rod member from detaching.

9. The loom toy according to claim 6 or 7, wherein, The first locking groove includes a second anti-detachment groove, which extends toward the second locking groove to prevent the first rod member from detaching.

10. The loom toy according to any one of claims 1 to 4, wherein, The bar component is rotatably supported on the loom body. A protrusion is provided at at least one end of the rod member.

11. The loom toy according to any one of claims 1 to 4, wherein, The loom toy also includes a raw material passing component for passing the second raw material between the first raw materials. A through hole is provided at the end of the raw material penetrating member for the second raw material to pass through. A notch is provided on the inner periphery of the through hole.

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