JP6007752B2 - Coil spring compressor - Google Patents

Description

  The present invention relates to a coil spring compressor, for example, a coil spring compressor for compressing a coil spring applied in a suspension for a vehicle.

  Conventionally, when disassembling, assembling, or replacing a vehicle suspension, a coil spring compressor for compressing a suspension coil spring has been used.

  By the way, the coil spring applied in the suspension for the vehicle is greatly different in the outer diameter, the number of turns, the elastic coefficient, and the like according to the use and performance of the vehicle. Therefore, in this field, development of a coil spring compressor that can cope with various types of coil springs is desired.

  In response to such a request, Patent Documents 1 and 2 disclose coil spring compressors that can safely compress various types of coil springs.

  A compression device for a vehicle coil spring disclosed in Patent Document 1 includes a compression device main body having a feed screw mechanism, and two engaging claws whose interval dimension is variable by the feed screw mechanism. The engaging claw is provided with a protruding claw that is hooked from the outside on a winding line that is separated in the axial direction of the coil spring, and is opposed to the protruding claw of at least one of the engaging claw, together with the protruding claw A detachment prevention claw portion is provided to prevent the shoreline from coming off by sandwiching the shoreline of the coil spring.

  In addition, the coil spring compressor disclosed in Patent Document 2 includes a pair of upper engagement pieces that are pivotally supported by a base shaft and engage the upper side of the coil spring from the outside, and a coil spring that is pivotally supported by the base shaft. A pair of lower engaging pieces that engage the lower side of the outer side of the lower side, and each of the upper engaging pieces or the lower engaging pieces that are arranged to face each other in the holding direction around the base axis, and then coil springs And a pair of upper engaging pieces and a lower engaging piece. A claw body that is hooked on a coil spring is pivotally supported and rotatably supported on each of the pair of upper engaging pieces and the lower engaging pieces. Is.

JP-A-10-076475 JP-A-10-180650

  According to the compression device for a vehicle coil spring disclosed in Patent Document 1, the disengagement prevention claw portion provided to face the protruding claw portion of at least one of the engaging claw portions together with the protruding claw portion, By preventing the winding wire from coming off by being sandwiched, the coil spring is prevented from coming off from the compression device and splashing even when the engaging claw portion can be removed from the winding wire of the coil spring.

  Further, according to the coil spring compressor disclosed in Patent Document 2, a helical coil spring is obtained by pivotally supporting a pawl body with respect to a corresponding upper engagement piece or lower engagement piece. Accordingly, the position of the upper engagement piece and the lower engagement piece can be adjusted in an inclined state.

  However, in the vehicular coil spring compression device disclosed in Patent Document 1, the configuration of the disengagement prevention claw portion that sandwiches the winding of the coil spring is complicated, and the manufacturing cost of the compression device increases. There is a problem in that after the compression device is attached to the coil spring, the interval between the engaging claws of the two compression devices needs to be reduced synchronously, and the compression work of the coil spring becomes complicated.

  Further, in the coil spring compressor disclosed in Patent Document 2, for example, when the coil spring is tightened or when a suspension that compresses the coil spring is dropped, the shoreline of the coil spring comes off from the claw body. Can occur.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a coil spring compressor that can reliably support and compress a coil spring with a simple configuration.

  To achieve the above object, a coil spring compressor according to the present invention includes a body, at least two arms spaced apart in the axial direction of the body, and at least two hooks attached to each of the arms. A coil spring compressor that compresses the coil spring in the axial direction by bringing the at least two arms close to each other in the axial direction of the body in a posture in which the coil spring is supported by the hook. Each is provided with a retaining pin for preventing the coil spring from falling off the hook.

  According to the coil spring compressor described above, the retaining pin for preventing the coil spring from falling off is provided on each hook, thereby reliably preventing the coil spring from falling off from each hook. The coil spring can be reliably supported and compressed with a simple configuration.

  In the coil spring compressor described above, the retaining pin is provided at a position facing the concave surface of the hook, and the coil spring is loosely fitted in a space defined by the concave surface of the hook and the retaining pin. It is something that has come to be.

  According to the coil spring compressor described above, when the coil spring is loosely fitted in the space defined by the concave surface of the hook and the retaining pin, the coil spring is retained from the concave surface of the hook when the coil spring is compressed. Since it can be slid in the space defined by the pin and the force applied to the coil spring can be relaxed when the coil spring is compressed, the coil spring can be deformed and damaged while securely supporting the coil spring. Can be suppressed.

  In the coil spring compressor described above, the hook is rotatably attached to the arm, and the retaining pin rotates in synchronization with the rotation of the hook with respect to the arm. is there.

  According to the coil spring compressor described above, the hooks are rotatably attached to the arm, so that each hook is rotated following the change in the winding angle of the coil spring when the coil spring is compressed, for example. The coil spring can be reliably supported by the concave surface of the hook, and deformation and damage of the coil spring can be effectively suppressed. In addition, by rotating the retaining pin in synchronization with the rotation of the hook with respect to the arm, for example, the relative positional relationship between the hook and the retaining pin when compressing the coil spring can be maintained. It is possible to reliably prevent the hook from falling off.

  In the coil spring compressor described above, the retaining pin is attached to the arm via a mounting plate, and the mounting plate and the hook rotate in synchronization with the arm. It is.

  According to the coil spring compressor described above, since the retaining pin is attached to the arm via the mounting plate, the retaining pin can be provided on the hook without greatly changing the configuration of the hook or the arm. And an increase in the manufacturing cost of the coil spring compressor can be suppressed.

  As can be understood from the above description, according to the coil spring compressor of the present invention, it is possible to prevent the coil springs from dropping from the respective hooks with a simple configuration, and to reliably support various types of coil springs. The suspension can be compressed and the workability such as disassembly, assembly, and replacement of the suspension can be improved.

It is the whole perspective view showing the whole composition of the embodiment of the coil spring compressor of the present invention. FIG. 2 is a partially enlarged view showing an enlarged tip of an arm of the coil spring compressor shown in FIG. 1. It is the side view explaining the front-end | tip part of the arm shown in FIG. 2, Comprising: (a) is the figure explaining an example of the state which the hook and the attachment plate rotated with respect to the arm structure, (b) It is the figure explaining the state by which the hook and the attachment plate were arrange | positioned with the attitude | position substantially orthogonal to an arm structure, (c) is another example of the state which the hook and the attachment plate rotated with respect to the arm structure. FIG. It is the whole perspective view which showed roughly the use condition of the coil spring compressor shown in FIG. It is the elements on larger scale which expanded and showed the front-end | tip part of the arm at the time of engaging a coil spring with a hook, (a) is the perspective view, (b) is the side view, (c) is a figure. It is an AA arrow line view of 5 (b). It is the elements on larger scale which expanded and showed the front-end | tip part of the arm at the time of attaching a retaining pin to a mounting plate, (a) is the perspective view, (b) is the side view, (c) is a figure. It is a BB arrow line view of 6 (b). It is the figure which showed the state which set the coil spring to the coil spring compressor, Comprising: (a) is the top view, (b) is CC arrow directional view of Fig.7 (a). It is the figure which showed the state which compressed the coil spring with the coil spring compressor following FIG. 7, (a) is the top view, (b) is the DD arrow line view of Fig.8 (a). .

  Hereinafter, embodiments of a coil spring compressor of the present invention will be described with reference to the drawings.

  First, an embodiment of a coil spring compressor of the present invention will be outlined with reference to FIGS. FIG. 1 is an overall perspective view showing the overall configuration of an embodiment of a coil spring compressor of the present invention. FIG. 2 is a partially enlarged view showing the tip end portion of the arm of the coil spring compressor shown in FIG. 1 in an enlarged manner. 3 is a side view illustrating the tip of the arm shown in FIG. 2, and FIG. 3 (a) is a diagram illustrating an example of a state in which the hook and the mounting plate are rotated with respect to the arm structure. FIG. 3B is a diagram illustrating a state in which the hook and the mounting plate are arranged in a posture substantially orthogonal to the arm structure, and FIG. 3C is a diagram in which the hook and the mounting plate are arms. It is a figure explaining the other example of the state rotated with respect to the structure.

  A coil spring compressor 100 shown in FIG. 1 mainly includes a body 1, two arms 2 and 3 that are spaced apart in the axis L direction of the body 1, and two hooks 4 and 5 attached to the arm 2. And two hooks 6 and 7 attached to the arm 3.

  The arm 2 is composed of two semi-U-shaped arm components 21 and 22, the base of one arm component 21 is connected to the body 1, and the base of the other arm component 22 is the arm. The arm structure 22 is connected to the base of the structure 21 and is rotatable relative to the base of the arm structure 21. Thereby, the arm 2 composed of the arm constituting bodies 21 and 22 is formed in a substantially U shape, and the relative positions of the distal ends of the arm constituting bodies 21 and 22 constituting the arm 2 can be freely changed. Yes.

  Similarly to the arm 2, the arm 3 is composed of two half-U-shaped arm components 31 and 32, and the base of one arm component 31 is connected to the body 1, and the other The base of the arm structure 32 is connected to the base of the structure 31, and the arm structure 32 is rotatable relative to the base of the arm structure 31. Thereby, the arm 3 composed of the arm constituting bodies 31 and 32 is formed in a substantially U shape, and the relative positions of the distal ends of the arm constituting bodies 31 and 32 constituting the arm 3 can be freely changed. Yes.

  The hooks 4 and 5 are respectively attached to the inner surfaces of the distal end portions of the arm constituent bodies 21 and 22 so that the concave surfaces 41 and 51 face the side of the arm 3 that is spaced apart in the axis L direction. In addition, the hooks 4 and 5 have arm configurations around rotation axes L21 and L22 that are orthogonal to the inner surfaces (the mounting surfaces of the hooks 4 and 5 and the arm components 21 and 22) of the distal ends of the arm components 21 and 22, respectively. It is relatively rotatable with respect to the bodies 21 and 22. The hooks 6 and 7 are attached to the inner surfaces of the distal end portions of the arm constituent bodies 31 and 32 so that the concave surfaces 61 and 71 face the side of the arm 2 that is spaced apart in the axial center L direction. . In addition, the hooks 6 and 7 have arm configurations around rotation axes L31 and L32 that are orthogonal to the inner surfaces (mounting surfaces of the hooks 6 and 7 and the arm components 31 and 32) of the tip portions of the arm components 31 and 32, respectively. It is relatively rotatable with respect to the bodies 31 and 32. The concave surfaces 41, 51, 61, 71 of the hooks 4, 5, 6, 7 have a shape substantially complementary to the winding of the coil spring supported by the hooks 4, 5, 6, 7. .

  Further, substantially rectangular mounting plates 23 and 24 having through holes 25 and 26 are attached to the outer surfaces of the distal end portions of the arm constituent bodies 21 and 22, and the bolts pass through the through holes 25 and 26, for example, bolts. The retaining pins 27, 28 made of are extended to positions facing the concave surfaces 41, 51 of the hooks 4, 5 attached to the inner surfaces of the tip portions of the arm constituent bodies 21, 22 (see FIG. 2). Here, the mounting plates 23 and 24 are respectively connected to the hooks 4 and 5 via the arm structures 21 and 22, and the mounting plates 23 and 24 and the hooks 4 and 5 are connected to the arm structures 21 and 22. In synchronism with this, it rotates around the rotation axis L21, L22 (see FIG. 3).

  Further, substantially rectangular mounting plates 33 and 34 having through holes 35 and 36 are attached to the outer surfaces of the distal end portions of the arm constituent bodies 31 and 32, and for example, bolts are passed through the through holes 35 and 36. The retaining pins 37, 38 made of are extended to positions facing the concave surfaces 61, 71 of the hooks 6, 7 attached to the inner surfaces of the tip portions of the arm constituting bodies 31, 32. Here, the mounting plates 33 and 34 are respectively connected to the hooks 6 and 7 via the arm structural bodies 31 and 32, and the mounting plates 33 and 34 and the hooks 6 and 7 are connected to the arm structural bodies 31 and 32. In synchronism with this, it rotates around the rotation axis L31, L32.

  Next, referring to FIG. 4, the usage state of the coil spring compressor shown in FIG. 1 will be outlined.

  As shown in the drawing, in the coil spring compressor 100 placed on the gantry D, for example, the hooks 4, 5, 6, 7 of the coil spring compressor 100 are engaged with the coil spring S of the suspension P, and the hooks 4, 5 The two arms 2 and 3 are brought close to each other in the direction of the axis L of the body 1 in a posture in which one end side of the coil spring S is supported by and the other end side of the coil spring S is supported by the hooks 6 and 7. As a result, the coil spring S can be compressed in the direction of the axis L of the body 1 against the urging force of the coil spring S. Here, the hooks 4, 5 and the hooks 6, 7 are respectively disposed at substantially symmetrical positions with respect to the axial center of the coil spring S, and the coil spring S is approximately in the direction of the axial center L of the body 1. It can be compressed uniformly.

  After the coil spring S is compressed in the direction of the axis L of the body 1, the suspension P is disassembled, assembled, and replaced, and then the two arms 2 and 3 are connected to the axis L of the body 1. For example, the coil spring S is returned to its original length or natural length, and the hooks 4, 5, 6, 7 are removed from the coil spring S.

  The use method of the coil spring compressor shown in FIG. 1 will be described more specifically with reference to FIGS. 5 to 10. First, as shown in FIG. 5, the retaining pins 27, 28, 37, and 38 are attached. The hooks 4, 5 attached to the arm 2 and the hooks 6, 7 attached to the arm 3 are connected to the coil spring S while being removed from the through holes 25, 26, 35, 36 of the plates 23, 24, 33, 34. The hooks 4, 5, 6, and 7 are engaged with the coil springs S while being inclined with respect to the arm structural bodies 21 and 22 and the arm structural bodies 31 and 32 so as to follow the winding angle θ (FIG. 5 ( a) and (b)). Thereby, the concave surfaces 41, 51, 61, 71 of the hooks 4, 5, 6, 7 and the coil spring S can be brought into surface contact to support the coil spring S, and deformation and damage of the coil spring S are suppressed. (See FIG. 5C). Here, the mounting plates 23, 24, 33, 34 are connected to the hooks 4, 5, 6, 7, respectively. The mounting plates 23, 24 and the hooks 4, 5 are connected to the arm components 21, 22. Synchronously rotating around the rotation axes L21 and L22, and the mounting plates 33 and 34 and the hooks 6 and 7 rotate around the rotation axes L31 and L32 in synchronism with the arm components 31 and 32. Yes. Further, when engaging each of the hooks 4, 5, 6, 7 with the coil spring S, the arm structure 22 is rotated relative to the base of the arm structure 21, or the arm structure 32 is By rotating relative to the base of the component 31, the shape of the arms 2 and 3 relative to the coil diameter of the coil spring S, that is, the relative positions of the hooks 4 and 5 and the hooks 6 and 7. Can also be adjusted.

  Next, as shown in FIG. 6, the retaining pins 27, 28, 37, 38 are attached through the through holes 25, 26, 35, 36 of the attachment plates 23, 24, 33, 34. Here, as described above, the mounting plates 23 and 24 and the hooks 4 and 5 rotate synchronously with respect to the arm structural bodies 21 and 22, and the mounting plates 33 and 34 and the hooks 6 and 7 are connected to the arm structural body 31, 32, the hooks 4, 5, 6, 7 and the retaining pins 27, 28, 37, 38 and the coil spring S are rotated even if the winding angle θ of the coil spring S changes. Is maintained (see FIGS. 6A and 6B). For example, the relative distance D between the hooks 4, 5, 6, 7 and the retaining pins 27, 28, 37, 38 is maintained substantially constant in a state where the relative distance D is smaller than the winding diameter d of the coil spring S. The spring S is reliably prevented from falling off the hooks 4, 5, 6, 7. Further, when the retaining pins 27, 28, 37, 38 are attached, gaps are provided between the retaining pins 27, 28, 37, 38 and the coil spring S, and the hooks 4, 5, 6, 7 are A coil spring S is loosely fitted in a space defined by the concave surfaces 41, 51, 61, 71 and the retaining pins 27, 28, 37, 38, and is applied to the coil spring S when the coil spring S is compressed. The force is relaxed (see FIG. 6C).

  In this way, the coil spring S is supported in the space defined by the concave surfaces 41, 51, 61, 71 of the hooks 4, 5, 6, 7 and the retaining pins 27, 28, 37, 38, and FIG. As shown in FIG. 8A, by bringing the two arms 2 and 3 close to each other in the axial center L direction of the body 1 with the coil spring S set in the coil spring compressor 100, as shown in FIG. The coil spring S is compressed in the direction of the axis L of the body 1.

  Here, as shown in FIG. 7B and FIG. 8B, as the coil spring S is compressed by the coil spring compressor 100, for example, the winding of the coil spring S around the arm constituent bodies 21, 22, 31, and 32 is performed. The angle becomes smaller (changes from θ1 to θ2). In the present embodiment, as described above, the attachment plates 23 and 24 to which the retaining pins 27 and 28 are attached and the hooks 4 and 5 are synchronized with the arm components 21 and 22 and the rotation axis L21. , The mounting plates 33 and 34 to which the retaining pins 37 and 38 are attached and the hooks 6 and 7 are rotated around the rotation axes L31 and L32 in synchronization with the arm components 31 and 32. Rotate. Therefore, the mounting plates 23 and 24 and the hooks 4 and 5 are synchronized with the arm components 21 and 22 so as to follow the change in the winding angle of the coil spring S while the coil spring S is compressed. The mounting plates 33 and 34 and the hooks 6 and 7 rotate synchronously with respect to the arm structural members 31 and 32, and the hooks 4, 5, 6, 7, the coil spring S can be supported by bringing the concave surfaces 41, 51, 61, 71 and the coil spring S into surface contact, and deformation and damage of the coil spring S can be suppressed. Further, as the coil spring S is compressed by the coil spring compressor 100, the positional relationship between the hooks 4, 5, 6, and 7 and the coil spring S may be changed. The coil spring S is loosely fitted in the space defined by the concave surfaces 41, 51, 61, 71 of the 5, 6, 7 and the retaining pins 27, 28, 37, 38. When the coil spring S is compressed, The coil spring S can be slid in the space defined by the concave surfaces 41, 51, 61, 71 of the hooks 4, 5, 6, 7 and the retaining pins 27, 28, 37, 38. The force applied to the spring S can be relaxed, and deformation and damage of the coil spring S can be further suppressed.

  Thus, according to the present embodiment, it is possible to prevent the coil spring S from falling off the hooks 4, 5, 6, and 7 with a simple configuration, while suppressing deformation and damage of the coil spring S. Since various types of coil springs can be reliably supported and compressed, workability such as suspension disassembly, assembly, and replacement can be significantly improved.

  In the above-described embodiments, two arms are used and two hooks are attached to each arm. However, the number of arms and the number of hooks attached to each arm are different from those of the coil spring. It can be appropriately changed according to the diameter, the number of turns, the elastic modulus, and the like.

  Further, in the embodiment described above, the description has been given of the mode in which the retaining pin is attached to the mounting plate attached to the outer surface of the distal end portion of the arm structure. However, the retaining pin may be attached to the arm or the hook, for example. You may arrange | position a plate between the inner surface of the front-end | tip part of an arm structure, and a hook.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

DESCRIPTION OF SYMBOLS 1 ... Body, 2, 3 ... Arm, 21, 22, 31, 32 ... Arm structure, 23, 24, 33, 34 ... Mounting plate, 25, 26, 35, 36 ... Through-hole, 27, 28, 37, 38: retaining pin, 4, 5, 6, 7 ... hook, 41, 51, 61, 71 ... concave surface, 100 ... coil spring compressor, D ... mount, L ... body axis, P ... suspension, S ... coil spring

Claims (3)

A body, at least two arms spaced apart in the axial direction of the body, and at least two hooks attached to each of the arms, wherein the coil springs are supported by the hooks in the posture described above. A coil spring compressor that compresses the coil spring in the axial direction by bringing at least two arms close to each other in the axial direction of the body;
Each of the hooks is provided with a retaining pin that prevents the coil spring from falling off the hook.
Each of the arms is composed of two half-U-shaped arm structures and is formed in a U-shape.
In each of the arms, one arm structure of the two arm structures is connected to the body so as to be rotatable around a rotation axis in a direction perpendicular to the axis of the body. At the same time, the hook is rotatably attached to the tip,
In each of the arms, said two arms construct other arm structure of the the base of its base is the one arm structure, rotatable relative to the base of one arm structure the And the hook is rotatably attached to the tip thereof,
In each of the arms, the relative position between the tip portions of the two arm components is freely changeable,
By bringing the two arms close to each other in the axial direction of the body in a posture in which the coil spring is supported by the hook, each of the arms rotates with respect to the body, and the hook and the hook are provided. A coil spring compressor in which the retaining pin rotates synchronously with respect to the arm.   The said retaining pin is provided in the position which opposes the concave surface of the said hook, and a coil spring is loosely fitted in the space defined by the concave surface of the said hook and the said retaining pin. The coil spring compressor according to 1.   The coil according to claim 1 or 2, wherein the retaining pin is attached to the arm via a mounting plate, and the mounting plate and the hook are rotated in synchronization with the arm. Spring compressor.

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