JP4806318B2 - Compression coil spring assembly structure and vehicle hood lift device - Google Patents

Description

  The present invention relates to a compression coil spring assembly structure for fixing an end portion of a coil spring to a spring receiving portion provided on a mounting plate, and a vehicle hood lift device including the assembly structure.

The vehicle hood lift device includes a compression coil spring for applying an upward force to the fully closed hood. As a means for attaching the end portion of the compression coil spring to a predetermined portion, for example, the inner panel of the hood, a hook piece is provided on the inner panel of the hood, and the upper end portion of the compression coil spring is locked to the hook piece. (For example, refer to Patent Document 1).
U.S. Pat. No. 2,275,740

  In the conventional compression coil spring assembly structure as described above, the upper end of the compression coil spring is prevented from rotating and shifting its height in the state where the compression coil spring is attached to the inner panel of the hood. Is locked by a hooking piece. For this reason, in order to fix the upper end portion of the compression coil spring, it is necessary to bend the hook piece and lock the upper end portion of the compression coil spring, and the assembly work is troublesome.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a compression coil spring assembly structure and a vehicle hood lift device that can easily and reliably attach a coil spring to a predetermined portion. It is said.

According to the present invention, the above problem is solved as follows.
(1) In a compression coil spring assembly structure in which an end portion of a compression coil spring is fixed to a spring receiving portion provided on a mounting plate, the compression coil spring is flat at the end portion bent toward the inner diameter side of the coil portion. The spring receiving portion is placed between the locking portion and the final winding coil portion adjacent to the locking portion, and the locking portion touches one surface of the spring receiving portion. The final winding coil portion is fixed to the spring receiving portion in a state of being sandwiched by elastic force so that the final winding coil portion is in contact with the other surface of the spring receiving portion, and the spring receiving portion is fixed to the locking portion. Is engaged with the outer periphery of the final winding coil portion so as to suppress rotation around the axis of the compression coil spring, and the axis of the compression coil spring. And a holding portion to prevent movement perpendicular to the direction.

(2) In the above item (1), the compression coil spring is rotated in a direction opposite to the winding direction of the coil portion with the spring receiving portion sandwiched between the adjacent coil portions of the compression coil spring. Thus, the end portion of the compression coil spring is fixed to the spring receiving portion.

(3) In the above item (1) or (2), the engaging portion of the compression coil spring is formed in a substantially U shape when viewed from the end of the compression coil spring, and the engagement of the spring receiving portion is Protrusions that can abut against the engaging portions with respect to the movement perpendicular to the axial direction are provided in the joint recesses.

(4) In any one of the above items (1) to (3), the engagement recess of the spring receiving portion has a plate thickness of the mounting plate that extends from a general surface of the mounting plate to a wire diameter of the compression coil spring. It is recessed by an amount approximately corresponding to the dimension obtained by adding.

(5) In the vehicle hood lift device for applying an upward force to the hood of the vehicle in the fully closed state, the attachment of the compression coil spring assembly structure described in any of (1) to (4) above The plate is fixed so that the engagement recess faces the attachment surface of either the inside of the hood or the vehicle body.

According to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, the spring receiving portion is engaged with the engagement concave portion that engages the locking portion of the compression coil spring so as to suppress the rotation around its axis, and the outer periphery of the final winding coil portion. By having the holding portion that prevents the movement of the compression coil spring in the direction orthogonal to the axial direction, the end portion of the compression coil spring can be easily and reliably fixed to the spring receiving portion.

According to the second aspect of the present invention, the compression coil spring is rotated by rotating the compression coil spring in the direction opposite to the winding direction of the coil portion with the spring receiving portion sandwiched between the adjacent coil portions of the compression coil spring. By fixing the end portion of the coil spring to the spring receiving portion, the end portion of the compression coil spring can be easily fixed to the spring receiving portion.

According to the third aspect of the present invention, the locking portion of the compression coil spring is formed in a substantially U shape when viewed from the end of the compression coil spring, and the engagement recess of the spring receiving portion is formed with respect to the locking portion. By providing the protrusion that can abut against the movement orthogonal to the axial direction, the compression coil spring can be reliably fixed by the spring receiving portion.

According to the fourth aspect of the present invention, the engaging recess of the spring receiving portion is recessed from the general surface of the mounting plate by an amount substantially corresponding to the dimension obtained by adding the plate thickness of the mounting plate to the element wire diameter of the compression coil spring. Thus, the compression coil spring can be attached substantially perpendicular to the spring receiving portion.

  According to the fifth aspect of the present invention, the mounting plate of the compression coil spring assembly structure is fixed so that the engaging recess faces the mounting surface on either the inside of the hood or the vehicle body. Since the locking part is interposed inside the hood or between the mounting surface of the vehicle body and the engagement recess, the end of the compression coil spring is more securely fixed, and an upward force is reliably applied to the hood. can do.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings. 1 is a perspective view of a front portion of a vehicle to which an embodiment of the present invention is applied, FIG. 2 is a front view of a hood lift device, FIG. 3 is a plan view of the hood lift device, and FIG. FIG. 5 is a longitudinal sectional view taken along line VV in FIG. 3, FIG. 6 is a longitudinal sectional view taken along line VI-VI in FIG. 5, and FIG. 7 is a transverse sectional view taken along line VII-VII in FIG. Is a longitudinal sectional view taken along line VIII-VIII in FIG. 7, FIG. 9 is a bottom view of the buffer member, FIG. 10 is a longitudinal sectional view of the compression coil spring, FIG. 11 is a view taken along arrow XI in FIG. 10 is a perspective view of the hood lift device in the middle of the assembly operation of the compression coil spring, and FIG. 15 is a perspective view of the hood lift device after the completion of the assembly of the compression coil spring. It is.

  As shown in FIG. 1, a hood (1) that constitutes an opening / closing body is pivotally attached to a front portion of a vehicle body so as to be opened and closed in a vertical direction, and strikers (not shown) provided on both left and right sides of the front end portion are mounted on a body frame (not shown). By engaging the left and right hood lock devices (3) and (3) provided in 2), the hood lock device is constrained to a fully closed state, and by operating a handle (not shown) provided in the vehicle, When the engagement between (3) and the striker is released, an upward force is applied to the hood (2) by the hood lift device (4) disposed in the center of the front end of the hood (1), It is lifted up to a lift position where a hand can be inserted into the gap between the vehicle body frame (2). The opening / closing body of the present invention is not limited to the hood of the vehicle, but may be a trunk lid, a back door, or the like.

When the hood (1) is lifted to the lift position, a secondary latch (5), which will be described later, assembled to the hood lift device (4) is engaged with a striker portion (not shown) provided on the vehicle body frame (2). Is held in the lift position. In this state, a hand is inserted into the gap between the front end portion of the hood (1) and the vehicle body frame (2), and the handle portion (51) provided on the secondary latch (5) is operated so that the secondary latch ( The hood (1) can be opened by releasing the engagement between 5) and the striker portion of the vehicle body frame (2).

  As shown in each figure, the hood lift device (4) is substantially fixed from the front end of the horizontal piece (62) and the horizontal piece (62) fixed to the inner panel (1a) of the hood (1) by bolts (not shown). A metal mounting plate (6) having a substantially L-shaped vertical piece (61) depending on a right angle, and a pivot (7) pointing in the front-rear direction on the vertical piece (61) of the mounting plate (6). The above-described secondary latch (5) to be attached and a compression coil spring (8) attached downward to a spring receiving portion (10) provided on a horizontal piece (62) of the attachment plate (6).

  The secondary latch (5) includes a hook portion (52) that engages with a striker portion (not shown) of the vehicle body frame (2) in the opening direction when the hood (1) is in the lift position, and the hood (1). And a handle (51) that can be operated from a gap between the vehicle body frame (2) and a spring (9) fitted to the pivot (7) by operating the handle (51) upward. The hook part (52) is detached from the striker part of the vehicle body frame (2) by rotating in the release direction (counterclockwise in FIG. 2) against the urging force of the hood (1). Allows opening.

  The compression coil spring (8) is formed as a conical coil spring whose upper end side coil diameter (D1) (see FIG. 10) is larger than the lower end side coil diameter (D2) (see FIG. 10). The portion is fixed to the spring receiving portion (10) of the mounting plate (6), and the buffer member (11) formed of an elastic material such as rubber is fixed to the lower end portion.

  When the hood (1) is in a fully closed state, the compression coil spring (8) is in a compressed state, and its lower end portion is interposed via a buffer member (11) as shown by a two-dot chain line in FIGS. By contacting the body frame (2), an upward force is applied to the hood (1).

Each of the upper end portion and the lower end portion of the compression coil spring (8) is provided with seats finished so that the end portions are flat, that is, locking portions (81) and (82). The root portions (81a) and (82a) of the respective locking portions (81) and (82) are in contact with the coil portions (83) and (83) adjacent to each other.

  As shown mainly in FIG. 11, the upper locking portion (81) of the compression coil spring (8) is bent in a substantially U shape toward the inner diameter side of the coil portion (83). As shown mainly in FIG. 12, the lower locking portion (82) is bent linearly toward the inner diameter side of the coil portion (83).

The upper end portion of the compression coil spring (8) is sandwiched between the upper locking portion (81) and the adjacent coil portion (83) by the elastic force between the upper and lower surfaces of the spring receiving portion (10). That is, the spring receiving portion is configured such that the locking portion (81) contacts the upper surface of the spring receiving portion (10) and the final winding coil portion (83) contacts the lower surface of the spring receiving portion (10). Fixed to (10).

Scan pulling receiving unit (10), as it is possible to fix the upper end of the compression coil spring (8) from the rear, is formed on the rear end of the horizontal plate (62), the upper engaging portion (81 ) Engages with the engagement recess (101) which is recessed downward by a predetermined amount so as to suppress rotation around the axis of the compression coil spring (8), and the coil portion (83) adjacent to the upper locking portion (81). Two downward U-shaped holding parts (102) engaged with the outer periphery and the inner periphery from above, and the upper locking part (81) And an upward projecting portion (103) that can be engaged. Further, a circular convex portion projecting downward by a predetermined dimension so as to be able to engage with the inner periphery of the coil portion (83) adjacent to the upper locking portion (81) on the lower surface of the spring receiving portion (10) (104) (see FIGS. 5 and 6) is formed.

Bolts for fixing the horizontal piece (62) to the inner panel (1a) of the hood (1) are inserted on the left and right sides of the spring receiving part (10) of the horizontal piece (62) in the mounting plate (6). A mounting hole (63) is formed.

  As shown in FIG. 6, the engagement recess (101) is opened at the rear, and on the reference surface (upper surface, that is, the inner panel (1a) of the hood (1) of the horizontal piece (62) of the mounting plate (6). The surface is recessed downward by a dimension (y) substantially corresponding to the dimension obtained by adding the plate thickness (t) of the horizontal piece (62) to the wire diameter (d) of the compression coil spring (8). As a result, the upper locking portion (81) engaged with the engagement recess (101) of the spring receiving portion (10) and the locking portion (81) that wraps around the lower surface side of the spring receiving portion (10) are adjacent to each other. Therefore, the compression coil spring (8) can be fixed at a substantially right angle to the lower side of the spring receiving part (10). An inclined surface (101a) is formed on the side surface of the engaging recess (101).

  Each holding part (102) is provided at the rear part of the spring receiving part (10) at positions spaced apart from each other by approximately 120 degrees in the circumferential direction around the axis of the compression coil spring (8). By engaging the outer periphery and the inner periphery of the coil portion (83) adjacent to the upper locking portion (81) of (8), in the direction (front-rear direction) perpendicular to the axial direction of the compression coil spring (8) Stop movement.

  The upward projecting portion (103) is provided at a position eccentric with respect to the axis (O) (see FIG. 3) of the compression coil spring (8), and its upper end portion is connected to the reference surface of the horizontal piece (62). It is set to be the same height or slightly lower.

  The upper locking portion (81) of the compression coil spring (8) engages with the engagement recess (101) of the spring receiving portion (10) and also engages with the upward protrusion (103). When the upper locking portion (81) is engaged with the engaging recess (101), as described above, the rotation around the axis of the compression coil spring (8) is suppressed, and also the upward protrusion (103) is engaged. In this case, the rotation of the compression coil spring (8) around the axis is suppressed, and at the same time, the movement in the direction in which the upper locking portion (81) is disengaged rearward from the engagement recess (101) is restricted.

  The buffer member (11) fixed to the lower end of the compression coil spring (8) is a disc-shaped seat (111) that comes into contact with the upper surface of the vehicle body frame (2) when the hood (1) is in the fully closed state. ), And a lower locking portion of the compression coil spring (8) provided on the upper surface of the seat portion (111) (the surface opposite to the contact surface (111a) contacting the upper surface of the vehicle body frame (2)). The raised portion (112) fitted to the inner periphery of the coil portion (83) adjacent to (82) and the lower locking portion (82) of the compression coil spring (8) are arranged in the lateral direction (compression coil spring (8 ) In the outer circumference of the coil portion (83) adjacent to the insertion hole (113) to be inserted and engaged from the direction (in the direction perpendicular to the axial direction) and the lower locking portion (82) of the coil spring (8). An annular protrusion (114) provided around the protuberance (112) is formed so as to surround it.

  A tapered surface (113a) (see FIG. 8) for facilitating insertion of the lower locking portion (82) into the insertion hole (113) is formed on the upper surface of the insertion hole (113). Is formed.

The seat portion (111) and the raised portion (112) are provided with holes (115) and (116) facing the vertical direction (axial direction) communicating with the insertion hole (113). The holes (115) and (116) are upper and lower mold punch holes when a lateral hole is formed in the buffer member (11) whose main body is formed by the upper and lower molds.

  On the abutting surface (111a) of the seat portion (111) in the buffer member (11), a plurality of projecting portions (117) projecting downward and abutting on the upper surface of the vehicle body frame (2) are provided. The protrusion (117) absorbs an impact when the seat (111) comes into contact with the vehicle body frame (2), and the contact surface (111a) of the seat (111) stays on the vehicle body for a long time. When contacting the upper surface of the frame (2), the contact surface (111a) of the seat portion (111) is prevented from sticking to the upper surface of the vehicle body frame (2) due to thermal effects or the like.

  In order to fix the buffer member (11) to the lower end portion of the compression coil spring (8), the end portion of the lower locking portion (82) of the compression coil spring (8) is inserted into the insertion hole (113 ) And the raised portion (112) of the buffer member (11) is fitted to the inner peripheral side of the coil portion (83) adjacent to the lower locking portion (82). Then, the coil portion (83) adjacent to the lower locking portion (82) is fitted between the raised portion (112) and the annular protrusion (114).

Thus, the buffer member (11) has the lower locking portion (82) engaged with the insertion hole (113), and the coil portion (83) is formed with the raised portion (112) and the annular protrusion (114). Is securely fixed to the lower end of the compression coil spring (8).

  Next, an operation procedure for attaching the compression coil spring (8) to the spring receiving portion (10) of the attachment plate (6) will be described. First, as shown in FIG. 13, from the rear of the spring receiving portion (10), the coil portion (83) adjacent to the upper locking portion (81) of the compression coil spring (8) and the coil portion (83 ) With the spring receiving portion (10) sandwiched between them, while engaging a part of the coil portion (83) with one holding portion (102), the compression coil spring (8) is moved to the coil portion ( Rotate in the direction opposite to the winding direction of 83) (arrow A direction).

Thereby, the whole compression coil spring (8) moves downward, and as shown in FIG. 14, a part of the coil part (83) adjacent to the upper locking part (81) becomes the other holding part ( 102), and the upper locking portion (81) is brought into sliding contact with the inclined surface (101a) of the engaging recess (101) so that the upward protruding portion (103) is wound around. Further, when the compression coil spring (8) is rotated, as shown in FIG. 15, the upper locking portion (81) is engaged with the engagement recess (101), and further rotation is prevented. As a result, the spring receiving portion (10) is sandwiched between the upper locking portion (81) and the coil portion (83) adjacent to the upper locking portion (81) by an elastic force, and the upper engaging portion (102) is The outer periphery and inner periphery of the coil portion (83) adjacent to the stop portion (81) are engaged, and the upper end portion of the compression coil spring (8) is fixed to the spring receiving portion (10).

  In a state where the compression coil spring (8) is fixed to the spring receiving portion (10), the upper locking portion (81) is engaged with the engaging recess (101) and the upward protruding portion (103). The rotation of the coil spring (8) around the axis is suppressed, the compression coil spring (8) rotates in the direction opposite to the assembly direction, the vertical position shifts, and the spring receiver (10) comes off. Can be prevented. Further, since the coil portion (83) engages with each holding portion (102) and the movement of the compression coil spring (8) in the direction perpendicular to the axial direction (front / rear / left / right direction) is prevented, the compression coil spring It is also possible to reliably prevent the upper end portion of (8) from being displaced from the mounting position with respect to the spring receiving portion (10).

When it is necessary to remove the compression coil spring (8) from the spring receiving portion (10), it can be easily removed by forcibly rotating the compression coil spring (8) in the direction opposite to the assembly direction. That is, when the compression coil spring (8) is forcibly rotated in the opposite direction, the curved portion (81b) of the upper locking portion (81) resists the elastic force and the inclined surface of the engaging recess (101). By riding on (101a), the upper locking portion (81) is disengaged from the engaging recess (101). Thereafter, the compression coil spring (8) can be easily detached from the spring receiving portion (10) by rotating it by a predetermined amount in the direction opposite to the assembly direction.

1 is a perspective view of a front portion of a vehicle to which an embodiment of the present invention is applied. It is a front view of a food lift device. It is a top view of a food lift device. It is a rear view of a food lift device. It is the VV line longitudinal cross-sectional view in FIG. It is the VI-VI line longitudinal cross-sectional view in FIG. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 5. It is the VIII-VIII line longitudinal cross-sectional view in FIG. It is a bottom view of a buffer member. It is a longitudinal cross-sectional view of a compression coil spring. It is a XI arrow line view in FIG. It is a XII arrow line view in FIG. It is a perspective view of the food lift apparatus in the middle of the assembly work of a compression coil spring. It is a perspective view of the food lift apparatus in the middle of the assembly work of a compression coil spring. It is a perspective view of the hood lift apparatus after the assembly of a compression coil spring is completed.

Explanation of symbols

(1) Hood (opening / closing body)
(1a) Inside panel
(2) Body frame
(3) Food lock device
(4) Food lift device
(5) Secondary latch
(6) Mounting plate
(7) Axis
(8) Compression coil spring
(9) Spring
(10) Spring receiving part
(11) Buffer member
(51) Handle part
(52) Hook part
(61) Vertical piece
(62) Horizontal piece
(63) Mounting hole
(81) Upper locking part
(81a) Root part
(81b) Curved part
(82) Lower locking part
(82a) Root part
(83) Coil part
(101) Engagement recess
(101a) Inclined surface
(102) Holding part
(103) Upward protrusion (protrusion)
(104) Convex
(111) Seat
(111a) Contact surface
(112) Raised part
(113) Insertion hole
(113a) Tapered surface
(114) Annular protrusion
(115) (116) hole
(117) Protrusion

Claims (5)

In the compression coil spring assembly structure in which the end of the compression coil spring is fixed to the spring receiving portion provided on the mounting plate,
The compression coil spring has a flat engaging portion bent at the inner end side of the coil portion at the end portion, and between the engaging portion and the final winding coil portion adjacent to the engaging portion, The spring receiving portion was sandwiched by elastic force so that the locking portion was in contact with one surface of the spring receiving portion, and the final winding coil portion was in contact with the other surface of the spring receiving portion . Fixed to the spring receiving portion in a state,
The spring receiving portion is engaged with an engaging recess that engages the locking portion so as to suppress rotation around the axis of the compression coil spring, and an outer periphery of the final winding coil portion. A compression coil spring assembly structure comprising: a holding portion that prevents movement in a direction orthogonal to the axial direction. The end of the compression coil spring is rotated by rotating the compression coil spring in a direction opposite to the winding direction of the coil portion with the spring receiving portion sandwiched between adjacent coil portions of the compression coil spring. 2. The compression coil spring assembly structure according to claim 1, wherein the portion is fixed to the spring receiving portion. The engaging portion of the compression coil spring is formed in a substantially U shape when viewed from the end of the compression coil spring, and the axial direction of the engaging recess of the spring receiving portion is relative to the engaging portion. The compression coil spring assembling structure according to claim 1 or 2, further comprising a protrusion capable of abutting against a motion orthogonal to the movement. The engaging recess of the spring receiving portion is recessed from the general surface of the mounting plate by an amount substantially corresponding to a dimension obtained by adding the plate thickness of the mounting plate to the wire diameter of the compression coil spring. The compression coil spring assembly structure according to any one of claims 1 to 3. In the vehicle hood lift device that applies upward force to the hood of the vehicle in the fully closed state,
The said mounting plate of the said compression coil spring assembly | attachment structure described in any one of Claims 1-4 was fixed so that the said engagement recessed part might face either the inner side of the said hood, or the mounting surface of a vehicle body A vehicle hood lift device.

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