JP2012218504A - Shock absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shock absorber, easily installable, and dispensing with installation work using a fixture.SOLUTION: The shock absorber (10) is a shock absorber (10) installed in an object (20) by fitting installation claws (12 and 13) in holes (22 and 23) arranged in the object (20) by arranging the installation claws (12 and 13) of a solid plate shape in a parting line (PL), wherein the installation claws (12 and 13) have at least two plate-like parts projecting from a body (3) of the shock absorber (10), and at least the two plate-like parts are connected by a connecting part formed in a smaller thickness than the thickness of the plate-like parts.

Description

  The present invention relates to a shock absorber, and more particularly to a shock absorber suitable for a knee bolster or the like.

  In front of the driver's seat of the automobile, a knee bolster having a function of receiving and restraining the movement of the driver's knee when the vehicle collides is disposed.

  However, the shock absorber used for the above-described knee support member is configured to have a mounting flange, and the mounting flange is fixed to an automobile as a mounting target using a mounting tool such as a screw. For this reason, the current situation is that the work of mounting the shock absorber is complicated.

  For this reason, development of an impact absorber that does not require attachment work using a fixture is considered necessary.

  As a technical document filed prior to the present invention, for example, Patent Document 1 (Japanese Patent Publication No. 2002-522286) discloses an inflatable knee support member.

  Patent Document 2 (Japanese Patent Laid-Open No. 2006-130936) discloses an impact absorber suitable for a vehicle door, roof, bonnet, and the like.

Special Table 2002-522286 JP 2006-130936 A

  However, the knee support member of Patent Document 1 is fixed to an automobile by screwing a mounting tab in the same manner as the conventional shock absorber described above. Also, the shock absorber of Patent Document 2 is fixed to the automobile by screwing the flange in the same manner as the conventional shock absorber described above.

  For this reason, the knee support member of Patent Document 1 and the shock absorber of Patent Document 2 also require a mounting tool, and the mounting work becomes complicated.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an impact absorber that can be easily attached and does not require an attaching operation using a fixture.

  In order to achieve this object, the present invention has the following features.

The shock absorber according to the present invention is
A solid plate-like mounting claw is provided in a parting line, and the mounting claw is fitted into a hole provided in an attachment object and attached to the attachment object,
The mounting claw has at least two plate-like portions protruding from the body of the shock absorber, and the at least two plate-like portions are connected by a connecting portion formed thinner than the plate-like portion. It is characterized by being.

  According to the present invention, it can be easily attached, and an attaching operation using an attachment can be made unnecessary.

1 is a view showing a state in which an impact absorber 10 of the present embodiment is attached to an automobile 100 as a knee support member 106. FIG. 1 is a diagram showing an example of the overall configuration of an impact absorber 10 of the present embodiment and a sheet metal 20 to which the impact absorber 10 is attached. FIG. 3 is a diagram illustrating a cross-sectional configuration example (a) along the line AA ′ of the shock absorber 10 illustrated in FIG. 2 and a cross-sectional configuration example (b) along the line BB ′. It is a figure which shows the structural example by the side of the 1st wall 4 of the shock absorber 10 shown in FIG. It is a figure which shows the structural example by the side of the 2nd wall 5 of the shock absorber 10 shown in FIG. It is a figure which shows the example of a side surface structure of the A side of the shock absorber 10 shown in FIG. It is a figure which shows the example of a side surface structure by the side of B of the shock absorber 10 shown in FIG. It is a figure which shows the example of a side surface structure by the side of C of the shock absorber 10 shown in FIG. An enlarged configuration example of the third attachment claw 13 of the shock absorber 10 is shown. FIG. 3 is a first view showing a state where the shock absorber 10 is attached to the sheet metal 20. FIG. 3 is a second view showing a state where the shock absorber 10 is attached to the sheet metal 20. It is a figure which shows the other structural example of the shock absorber 10 of this embodiment.

<Outline of the shock absorber 10 of the present embodiment>
First, an outline of the shock absorber 10 of the present embodiment will be described with reference to FIGS. 2 and 9. FIG. 2 shows an example of the overall configuration of the shock absorber 10 of the present embodiment, and FIG. 9 shows an example of the configuration of the mounting claws 12 and 13 provided on the shock absorber 10.

  The shock absorber 10 of the present embodiment has solid plate-like mounting claws 12 and 13 provided in the parting line PL, and the mounting claws 12 and 13 are provided in holes 22 provided in an attachment object (corresponding to the sheet metal 20). , 23 and is attached to the mounting object 20, and the mounting claws 12, 13 have at least two plate-like portions 14, 15 protruding from the main body 3 of the shock absorber 10, as shown in FIG. (Or 16), and at least two plate-like portions 14 and 15 are connected to each other by a connecting portion 14 'formed to be thinner than the plate-like portions 14 and 15. Note that the specific thickness of the connecting portion 14 ′ is 0.5 mm or less. Since at least two plate-like portions 14 and 15 constituting the attachment portions 12 and 13 of the present embodiment are connected by a connection portion 14 'formed of a thin wall having a thickness of 0.5 mm or less, the attachment claws 12, 13 is intentionally bent, and the mounting claws 12 and 13 can be easily inserted into the holes 22 and 23 of the mounting object 20, and after the insertion, the mounting claws 12 and 13 are fixed to the holes 22 and 23. be able to. As a result, the shock absorber 10 can be attached to the attachment object 20 without using a fixture such as a screw or a screw, so that the shock absorber 10 can be easily attached. Hereinafter, the shock absorber 10 of the present embodiment will be described in detail with reference to the accompanying drawings.

<Installation example of shock absorber 10>
First, an example of mounting the shock absorber 10 of this embodiment will be described with reference to FIG. FIG. 1 shows a state where the shock absorber 10 shown in FIGS. 2 to 9 is attached to the automobile 100 as a shock absorber of the knee support member 106.

  An automobile 100 shown in FIG. 1 includes an occupant compartment 103 including a front seat 102 for an occupant including a driver 101, and an instrument panel 104 is located on a side surface of the steering wheel 105. The shock absorber 10 (see FIGS. 2 to 9) of this embodiment is attached to the lower side of the instrument panel 104 as a knee support member 106. The knee support member 106 is attached so as to be adjacent to each knee 107 of the driver 101. Thus, when the automobile 100 receives an impact, the knee 107 of the driver 101 comes into contact with each knee receiving member 106, absorbs the impact by the knee receiving member 106, and reduces the impact applied to the knee 107. Yes.

<Configuration example of shock absorber 10>
Next, a configuration example of the shock absorber 10 of the present embodiment will be described with reference to FIGS. FIG. 2 is a diagram showing an example of the overall configuration of the shock absorber 10 of the present embodiment and the sheet metal 20 to which the shock absorber 10 is attached, and FIG. 3 shows an A- of the shock absorber 10 shown in FIG. It is a figure which shows the cross-sectional structural example (a) of an A 'line, and the cross-sectional structural example (b) of a BB' line. 4 shows a configuration example of the shock absorber 10 shown in FIG. 2 on the first wall 4 side, and FIG. 5 shows a configuration example of the shock absorber 10 shown in FIG. 2 on the second wall 5 side. 6 shows an example of a side configuration on the A side of the shock absorber 10 shown in FIG. 2, FIG. 7 shows an example of a side configuration on the B side of the shock absorber 10 shown in FIG. 2, and FIG. A side configuration example of the C side of the shock absorber 10 shown in FIG. FIG. 9 shows an enlarged configuration example of the third attachment claw 13 of the shock absorber 10.

  The shock absorber 10 of the present embodiment is formed by blow molding a thermoplastic resin into a hollow shape. As shown in FIG. 3 (a), the main bodies 3 having the hollow portions 2 are opposed to each other. A plurality of concave ribs 6 and 7 formed by recessing the wall 4 and the second wall 5 toward the other are provided. The shape of the concave ribs 6 and 7 is preferably a strip shape continuously connected in the same direction as the impact direction as shown in FIG. Thereby, the rigidity with respect to the impact from an impact direction can be improved.

  As the thermoplastic resin constituting the shock absorber 10 of the present embodiment, a known resin can be applied. For example, it should be composed of a resin with a high mechanical highness such as a polyolefin resin such as polyethylene or polypropylene, a styrene resin such as polystyrene or ABS resin, a polyester resin such as polyethylene terephthalate, polyamide or a mixture thereof. Can do.

  In addition, in a range not impairing mechanical strength (impact resistance), for example, fillers such as silica, pigments, dyes, heat stabilizers, light stabilizers, plasticizers, antistatic agents, flame retardants, flame retardants, One type or two or more types of additives used in this field such as anti-aging agent, ultraviolet absorber, antioxidant, anti-fogging agent and lubricant can also be contained.

  Further, as shown in FIG. 2, the shock absorber 10 of the present embodiment has mounting claws 11, 12, 13 on the side surface of the main body 3, and the mounting claws 11, 12, 13 are attached to the sheet metal 20. The shock absorber 10 can be attached to the automobile by fitting into the provided holes 21, 22, and 23. However, when the shock absorber 10 of the present embodiment is attached to an automobile, the sheet metal 20 needs to be mounted in advance on the parts of the automobile. Thereby, the shock absorber 10 of the present embodiment can be easily attached to the automobile without using a fixture such as a screw or a screw.

  The shock absorber 10 of the present embodiment includes a first mounting claw 11 formed into a hollow shape by blow molding, and second and third mounting claws 12, 13 formed into a solid plate shape by compression. Have and configure.

  As shown in FIG. 3B, the first mounting claw 11 is formed in a hollow shape and has high rigidity. The hollow portion 8 formed inside the first mounting claw 11 is integrated with the hollow portion 2 formed inside the main body 3, and the hollow portion 2 of the main body 3 and the first mounting claw 11 are integrated. It is configured so that air can flow into and out of the hollow portion 8.

  In addition, since the first attachment claw 11 of the present embodiment is a starting point when attaching the shock absorber 10 to the sheet metal 20, the tip of the first attachment claw 11 is tapered. Further, the first mounting claw 11 is configured to be hooked on the edge of the hole 21 when the first mounting claw 11 is inserted into the hole 21 corresponding to the first mounting claw 11. . Thereby, only the first attachment claw 11 can be easily inserted into the hole 21 and the shock absorber 10 can be hooked on the sheet metal 20. In this embodiment, as shown in FIG. 2, a concave notch 11 ′ that is recessed toward the inside of the first mounting claw 11 is formed at the joint between the main body 3 and the first mounting claw 11. The first mounting claw 11 is hooked on the edge of the hole 21 by the notch 11 ′. The shape of the notch 11 ′ is not particularly limited, and any shape can be applied as long as the first mounting claw 11 can be hooked on the edge of the hole 21. Further, the notch 11 ′ is formed with a thin wall, and when the first mounting claw 11 is hooked on the edge of the hole 21, the thin wall portion is elastically deformed along the edge of the hole 21, and the notch The part 11 ′ is in close contact with the edge of the hole 21. Thereby, the notch 11 ′ can be brought into close contact with the edge of the hole 21, and the first mounting claw 11 can be hooked on the edge of the hole 21.

  The second and third attachment claws 12 and 13 are formed in a solid plate shape by compression to increase elasticity. Specifically, as shown in FIG. 9, a step is provided on the mounting claw 13, a central plate-like portion 14 constituting the central portion of the mounting claw 13, and both-end plate-like portions 15 constituting both ends of the mounting claw 13 16 and both end plate-like portions 15 and 16 at both ends of the mounting claw 13 are bent toward the central plate-like portion 14 side.

  Further, the connecting portions 14 ′ and 14 ′ where the central plate-like portion 14 and the both-end plate-like portions 15 and 16 are connected are formed thin, and the both-end plate-like portions 15 and 16 are elastically deformed by the connecting portions 14 ′ and 14 ′. Thus, the attachment claw 13 is easily fitted into the hole 23. Further, even when the shape of the mounting claw 13 is larger than the hole 23 corresponding to the mounting claw 13, both end plate-like portions 15 and 16 are elastically deformed by the connecting portions 14 ′ and 14 ′, and the mounting claw 13 is It is easy to fit in the hole 23. In addition, after the mounting claws 13 are fitted into the holes 23, the shape of the plate-like portions 15 and 16 at both ends is restored to the original state, so that the mounting claws 13 can be fixed while being fitted into the holes 23. . In addition, it is preferable to form thickness of connection part 14 ', 14' in 0.01mm-0.5mm. Thereby, both-ends plate-like parts 15 and 16 can be bent by connection part 14 'and 14', and both-ends plate-like parts 15 and 16 can make it easy to elastically deform. The width of the central plate-like portion 14 is preferably configured to be longer than the width of the both-end plate-like portions 15 and 16. As a result, the both-end plate-like portions 15 and 16 can be easily bent with the central plate-like portion 14 as the central axis.

  Also, a concave notch 17 is formed at the joint between the main body 3 and the mounting claw 13, and when the mounting claw 13 is inserted into the hole 23, the edge of the hole 23 fits into the notch 17 It is supposed to be. The shape of the notch 17 is not particularly limited, and any shape can be applied as long as it can be fitted to the edge of the hole 23. Further, the central plate-like portion 14 is recessed closer to the second wall 5 side than the both-end plate-like portions 15 and 16 due to the connecting portions 14 'and 14' standing and connected to both ends of the central plate-like portion 14. A concave shape is formed, and the connecting portions 14 'and 14' are made thin. In addition, since the resin of the part which forms connection part 14 ', 14' is extended, so that the depth of the concave shape of the center plate-shaped part 14 is deep, connection part 14 ', 14' can be made thin. . The connecting portions 14 ′ and 14 ′ are preferably configured to be inclined by a predetermined angle so that the concave shape of the central plate-like portion 14 becomes a trapezoidal shape. Thereby, both end plate-like parts 15 and 16 can be easily elastically deformed toward the center plate-like part 14.

  Further, the mounting claw 13 of the present embodiment prevents the joining position where the central plate-like portion 14 is joined to the main body 3 and the joining position where the both-end plate-like portions 15 and 16 are joined to the main body from being on the same straight line. ing. For this reason, the strength of the joint between the mounting claw 13 and the main body 3 can be increased. Further, the mounting claw 13 of the present embodiment has the tip end side of the central plate-like portion 14 inclined upward, the tip ends of both end plate-like portions 15 and 16 are inclined downward, and the tip end portion of the central plate-like portion 14 The tip ends of the plate-like portions 15 and 16 at both ends are arranged on substantially the same line so that the tip end side of the mounting claw 13 has a sharp shape. Thereby, the front end side of the mounting claw 13 can be elastically deformed, and the mounting claw 13 can be easily fitted into the hole 23. In addition, when the mounting claw 13 is fitted into the hole 23, it comes into contact with the hole 23 in the vicinity of the joint with increased strength. Therefore, after the fitting claw 13 is fitted into the hole 23, the shock absorber 10 Can be fixed to the sheet metal 20.

  FIG. 9 shows an enlarged configuration example of the third mounting claw 13, but the second mounting claw 12 is configured similarly to the third mounting claw 13. However, although the central plate-like portion 14 of the third mounting claw 13 has a concave shape recessed toward the second wall 5, the central plate-like portion 14 of the second mounting claw 12 has the first wall 4. It has a concave shape recessed to the side. For this reason, the concave shape portion of the central plate-like portion 14 of the third attachment claw 13 and the concave shape portion of the central plate-like portion 14 of the second attachment claw 12 face the center of the main body 3. Yes.

  Moreover, it is preferable that the side surface of the main body 3 on which the mounting claws 11 to 13 are provided has a shape of a sheet metal 20 to which the shock absorber 10 is attached. Thereby, when the shock absorber 10 is attached to the sheet metal 20, the shock absorber 10 can be attached so as to be close to the sheet metal 20. In this embodiment, since the sheet metal 20 is formed in a flat plate shape, the side surface of the main body 3 on which the mounting claws 11 to 13 are provided is also formed in a flat plate shape.

  When attaching the shock absorber 10 of the present embodiment to an automobile, first, the rigid first attachment claw 11 is used as a starting point, and only the first attachment claw 11 is a hole corresponding to the first attachment claw 11. The first mounting claw 11 is hooked in the hole 21 by the notch 11 ′ of the first mounting claw 11. Next, the elastic second and third attachment claws 12 and 13 are inserted into the holes 22 and 23 corresponding to the second and third attachment claws 12 and 13, respectively. The third mounting claws 12 and 13 are fitted. Thereby, as shown in FIGS. 10 and 11, the shock absorber 10 can be attached to the automobile. 10 and 11 show a state in which the mounting claws 11 to 13 of the shock absorber 10 are fitted into the holes 21 to 23 provided in the sheet metal 20, and FIG. The state seen from the side of the sheet metal 20 fitted in the holes 21 to 23 is shown, and FIG. 11 shows the state of the side surface.

  In addition, when attaching the shock absorber 10 of this embodiment to a motor vehicle, it is necessary to attach the sheet metal 20 to the parts of the motor vehicle in advance. Thereby, the shock absorber 10 of the present embodiment can be easily attached to the automobile without using a fixture such as a screw or a screw. As a result, the mounting operation can be facilitated. Further, since the second and third attachment claws 12 and 13 are formed in a shape that is easily elastically deformed, the second and third attachment claws are inserted with the first attachment claws 11 inserted into the holes 21. 12, 13 can be easily fitted in the holes 22, 23.

  As shown in FIG. 2, the shock absorber 10 of the present embodiment has the mounting claws 11, 12, 13 on the parting line PL bent so that the mounting claws 11, 12, 13 are not positioned on a straight line. Provided. Thereby, as shown in FIG. 10, the location which attaches the shock absorber 10 to the sheet metal 20 can be prevented from being in a straight line. As a result, the shock absorber 10 can be stably fixed to the sheet metal 20. The first mounting claw 11 has a notch 11 ′, and the second and third mounting claws 12 and 13 have a concave notch 17, so that the notch The mounting claws 11, 12, 13 are engaged with the edges of the holes 21, 22, 23 by 11 ′, 17, and the shock absorber 10 can be fixed to the sheet metal 20.

<Operation / Effect of Shock Absorber 10 of this Embodiment>
As described above, the shock absorber 10 of the present embodiment includes the solid plate-like second and third mounting claws 12 and 13, and the second and third mounting claws 12 and 13. The shock absorber 10 is attached to the sheet metal 20 by being fitted into the holes 22 and 23 provided in the sheet metal 20. As a result, the shock absorber 10 can be attached to the sheet metal 20 without using a mounting tool such as a screw or a screw, so that the shock absorber 10 can be easily attached.

  Further, the second and third attachment claws 12 and 13 of the present embodiment are formed by thinly connecting portions 14 'and 14' where the central plate-like portion 14 and both-end plate-like portions 15 and 16 are connected, The plate-like parts 15 and 16 are elastically deformed by the connecting parts 14 'and 14'. Accordingly, the second and third mounting claws 12 and 13 can be intentionally bent, so that the second and third mounting claws 12 and 13 can be easily inserted into the holes 22 and 23 of the sheet metal 20. In addition, the second and third attachment claws 12 and 13 can be fixed in the hole 23 after insertion.

  The above-described embodiment is a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiment alone, and various modifications are made without departing from the gist of the present invention. Implementation is possible.

  For example, in the embodiment described above, the attachment claws 11 to 13 of the shock absorber 10 are fitted into the holes 21 to 23 provided in the sheet metal 20. However, the holes 21 to 23 corresponding to the mounting claws 11 to 13 of the shock absorber 10 are formed in advance in the automobile parts, and the mounting claws 11 to 13 of the shock absorber 10 are directly attached to the automobile parts. It is also possible.

  In the above-described embodiment, the case where the shock absorber 10 is used as a knee bolster has been described as an example. However, the shock absorber 10 of the present embodiment is not limited to the knee support member, and can be applied to a vehicle component member such as a bumper.

  In the above-described embodiment, as shown in FIG. 2, the first mounting claw 11 having a hollow shape and the second and third mounting claws 12 and 13 having a solid shape are provided. The mounting claws 11 to 13 are fitted into the holes 21 to 23 provided in the sheet metal 20, and the shock absorber 10 is attached to the sheet metal 20. However, as shown in FIG. 12, the hollow first mounting claw 11 is changed to a solid mounting claw 13, and only the solid mounting claw 12, 13 is configured. It is also possible to fit the shock absorber 10 to the sheet metal 20 by fitting 13 into holes 22 and 23 provided in the sheet metal 20. Even in such a configuration, the shock absorber 10 can be attached to the sheet metal 20 without using a fixture such as a screw or a screw, so that the shock absorber 10 can be easily attached.

  Moreover, although a part or all of said embodiment can be described also as the following additional remarks, it is not restricted to the following.

A solid plate-like mounting claw 12, 13 is provided in the parting line PL, and the mounting claw 12, 13 is fitted into holes 22, 23 provided in the object 20, and the shock absorber 10 is attached to the object 20. There,
The mounting claws 12 and 13 have at least two plate-like portions 14 and 15 (or 16) protruding from the main body 3 of the shock absorber 10, and at least two of the plate-like portions 14 and 15 The shock absorber 10 is characterized in that the shock absorber 10 is connected by a connecting portion 14 ′ formed thinner than the shape portions 14 and 15.

(Appendix 2)
The shock absorber 10 according to appendix 1, wherein the thickness of the connecting portion 14 'is 0.5 mm or less.

(Appendix 3)
The mounting claws 12 and 13 have a center plate-like portion 14 that constitutes the central portion of the mounting claws 12 and 13, and both-end plate-like portions 15 and 16 that constitute both ends of the mounting claws 12 and 13. The shock absorber 10 according to appendix 1 or 2, wherein the central plate-like portion 14 and the both-end plate-like portions 15, 16 are connected by the connecting portion 14 '.

(Appendix 4)
The center plate-like portion 14 and the both-end plate-like portions 15, 16 are inclined with respect to each other so that the tip portion of the center-plate-like portion 14 and the tip portions of the both-end plate-like portions 15, 16 are located on the same line. The shock absorber 10 according to supplementary note 3, characterized in that:

(Appendix 5)
The mounting claws 12, 13 have a concave notch 17 that is recessed toward the inside,
Any one of appendices 1 to 4, wherein when the mounting claws 12 and 13 are fitted into the holes 22 and 23, the edges of the holes 22 and 23 are fitted into the notches 17 respectively. 10. Shock absorber 10 as described.

(Appendix 6)
At least two mounting claws 12 and 13 and a rigid hollow mounting claw 11;
At least two of the attachment claws 12, 13 and the hollow attachment claw 11 are provided on the parting line PL bent so as not to be positioned on a straight line. The impact absorber 10 according to item 1.

(Appendix 7)
Having at least three mounting claws 12, 13;
The impact absorber according to any one of appendices 1 to 5, wherein at least three of the mounting claws 12 and 13 are provided on the parting line PL bent so as not to be positioned on a straight line. Ten.

DESCRIPTION OF SYMBOLS 10 Shock absorber 2, 8 Hollow part 3 Main body 4 1st wall 5 2nd wall 41,51 1st site | part 42,52 2nd site | part 43,53 3rd site | part 6,7 Concave rib PL parting line 11 1st attachment nail 11 ', 17 Notch part 12 2nd attachment nail 13 3rd attachment nail 14 Central plate-like part 14' Connection part 15, 16 Both-ends plate-like part 20 Sheet metal (attachment object)
21, 22, 23 holes

Claims (7)

A solid plate-like mounting claw is provided in a parting line, and the mounting claw is fitted into a hole provided in an attachment object and attached to the attachment object,
The mounting claw has at least two plate-like portions protruding from the body of the shock absorber, and the at least two plate-like portions are connected by a connecting portion formed thinner than the plate-like portion. A shock absorber characterized by having   The shock absorber according to claim 1, wherein a thickness of the connecting portion is 0.5 mm or less.   The mounting claw includes a central plate-shaped portion that constitutes a central portion of the mounting claw and both-end plate-shaped portions that constitute both ends of the mounting claw, and the central plate-shaped portion and the both-end plate-shaped portions; The shock absorbers according to claim 1 or 2, wherein the shock absorbers are connected by the connecting portion.   The central plate-like portion and the both-end plate-like portions are inclined with respect to each other so that the tip portion of the central plate-like portion and the tip portions of the both-end plate-like portions are located on the same line. The shock absorber according to claim 3. The mounting claw has a concave notch recessed toward the inside,
The impact absorber according to any one of claims 1 to 4, wherein when the mounting claw is fitted into the hole, an edge of the hole is fitted into the notch. Having at least two mounting claws and a rigid hollow mounting claw;
The at least two attachment claws and the hollow attachment claws are provided in the parting line that is bent so as not to be positioned on a straight line. Shock absorber. Having at least three mounting claws;
The shock absorber according to any one of claims 1 to 5, wherein at least three of the mounting claws are provided on the parting line bent so as not to be positioned on a straight line.

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