JP2777846B2 - Motorcycle seat lock structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat lock structure for a motorcycle.

[0002]

2. Description of the Related Art A motorcycle provided with a seat detachably or openable and closable from a vehicle body and a storage box such as a helmet below the seat is provided with a seat lock mechanism for locking the seat so as not to be opened in order to prevent theft. I have. FIG. 1 shows an example of a conventional seat lock structure in such a motorcycle (Japanese Utility Model Publication No. 62-10223).

[0003] A holding piece 04 for fixing a fuel tank 06 and a cushion rubber 03 for a seat are provided on a body frame 01 of the motorcycle.
And a rear cowl 05, and a seat 07 is placed behind the fuel tank 06. The seat 07 has a projecting piece 09 projecting from a front portion of the bottom plate 08 engaged with the holding piece 04, and a vehicle body frame via a cushion rubber 02 attached to the bottom surface of the bottom plate 08 and the cushioning rubber 03 for the seat. 01 and is locked by the seat lock mechanism.

The seat lock structure comprises a key cylinder 010 fixed to a rear cowl 05, a first arm 011 provided at the lower end of the key cylinder 010 so as to be swingable in the horizontal direction, and a first arm 01.
2nd arm 01 pivotally supported at one free end and biased in one direction
2 and the concave locking portion at the distal end of the second arm 012 engages with a locking projection 013 protruding from the rear end of the seat 07 to lock. To release the lock, insert the key into the key cylinder 010 and turn it.
The second arm 012 is rotated together with 11 so that the second arm 012 can be disengaged from the locking projection 013.

[0005]

The rear cowl 05 is fixed to the vehicle body frame 01, but the upper plate of the rear cowl 05 to which the key cylinder 010 is mounted is not fixed. Therefore, it is difficult to position the key cylinder 010 at a height position where the second arm 012 engages with the locking projection 013. Also, it is difficult to secure sufficient mounting strength of the key cylinder 010. The second arm is also the first arm
Is secured to the free end of the
It is difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide a low-cost motorcycle seat lock structure in which the positioning of a key cylinder is easy and the mounting strength can be increased. On the point.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a motorcycle provided with a seat detachably or openably and closably on a vehicle body.
L-shaped engagement with one end with the locking piece at the rear of the seat
Of the seat lock lever on the underside of the bracket
Then, the seat lock lever is biased to rotate in one direction.
Provided energized spring to the upper surface of the bracket is provided with a key cylinder having an operating lever to the other end engaging the seat lock lever to the rear cowl top plate, on the rear cowl
Grab the plate on both sides of the key cylinder.
The motorcycle has a seat lock structure that is fastened to the grab rail mounting stay at the rear of the body frame.

The rear cowl upper plate on which the key cylinder is provided is provided with a grab rail on both sides with respect to the key cylinder.
The key cylinder is fastened together with the grab rail mounting stay, making key cylinder positioning easy and reliable.
Low mounting strength can be ensured . Also the keishirin
With the lever at one end and the locking piece at the rear of the seat
The L-shaped seat lock lever engaged at the end also
Since it is pivotally supported on the lower surface of the bracket provided on the
Easy and reliable positioning of the seat lock lever ,
Sufficient mounting strength can be secured. And the rear cowl upper plate
Attached to the grab rail mounting stay together with the love rail
The seat lock lever is pivotally supported on the lower surface of the bracket.
Simple biased by the biasing spring provided on the upper surface
The operation lever and the seat of the key cylinder are
Since the mechanism is a simple mechanism in which the lock lever is engaged, the number of parts is small, the structure is simple, and the cost can be reduced .

[0009]

Embodiment An embodiment of the present invention shown in FIGS. 2 to 15 will be described below. FIG. 2 is a partially omitted side view of the scooter type motorcycle 1 to which the present invention is applied.
Is a plan view thereof. A down tube 3 extends downward from the head pipe 2 and has a lower end bent slightly rearward. The side tube 4 is branched right and left from a position slightly above the bent portion of the down tube 3 and bent rearward to form a side frame 4. Is extended. The left and right side frames 4 are made of a pipe material, and a grab rail mounting stay 61 connects the left and right rear end portions 4c via a rising portion 4b from a step portion 4a extending horizontally rearward.

A handle 5 is swingably supported by the head pipe 2. A front fork 6 extends below the head pipe 2 integrally with the handle 5, and a front wheel 7 is pivotally supported at a lower end thereof.

On the other hand, a bracket 19 is provided at a bent portion of the side frame 4 from the step portion 4a to the rising portion 4b. The front portion of the bracket 19 is supported by the link mechanism 8, and the rising portion 4b of the side frame 4 is provided. A power unit 9 is arranged below the power unit so as to be swingable up and down. The power unit 9 includes the engine 10 and the power transmission device 1
1. A rear wheel 12 is integrally formed, a front portion is supported by a link mechanism 8, and a rear cushion 13 is interposed and supported between the rear portion and the vehicle body frame.

The left and right step portions 4a of the side frame 4
A long bracket 14 is fixed to the front and rear along the upper surface, and a fuel tank 15 is mounted between the left and right brackets 14. The right and left rising portions 4 of the side frame 4
b, each of which is welded to the box mounting bracket 16;
The helmet is fixed to the mounting holes 17c provided in the horizontal plate portion 17a of the bracket 17 projecting forward from the grab rail mounting stay 61 at the rear end of the side frame 4 by bolts and nuts at the front left, right and rear, respectively. A storage box 18 is provided above the engine 10.

A front cover 20 is provided in front of the vehicle body so as to cover the head pipe 2 and the down tube 3.
A rear cover 21 is provided so as to cover the periphery of the helmet storage box 18 at the rear of the vehicle body, a footrest space is formed between the two covers 20, 21, and a step floor 22 covers the fuel tank 15 above.

In the vicinity of the rear end of the rising portion 4b of the left and right side frames 4, brackets 24 and 25 for attaching the rear fender 23 are respectively provided to protrude forward and backward.
A substantially U-shaped suspension member 26 is attached to the rear left and right brackets 25 with bolts and nuts 81, and the suspension member
Bolts and nuts 82 are fixedly attached to the connection portion 26 and the upper plate portion 23a of the rear ender 23 to suspend the rear ender 23.

Helmet storage box in rear cover 21
The upper opening of 18 is closed by a sheet 27 so as to be openable and closable. The upper end is fixed to the front end of the rear fender 23, and a plate-like mudguard rubber 28 extends diagonally downward and forward to shut off the rear wheel 12 and the upper part of the engine 10 and to prevent splash and dust caught by the rear wheel 12. The upper end of the mudguard rubber 28 is in contact with the lower end of the outer surface of the rear wall 18a of the helmet storage box 18 so as not to cover the carburetor 30 and the gap is eliminated, so that the hot air of the engine is not adhered to the aluminum foil. The temperature is prevented from rising to the upper portion of the helmet storage box 18 to prevent the temperature inside the helmet storage box 18 from rising.

A carburetor 30 is disposed above the engine 10 of the power unit 9, and a rear cushion 13 displaced leftward on the power transmission device 11 behind the carburetor 30.
The air cleaner 31 is provided so that the air cleaner 31 is turned outward, and the air cleaner 31 and the carburetor 30 communicate with each other through a duct 32.

A flexible duct 33 extends forward from the air cleaner 31, is connected to a rising portion 4b of the left side frame 4, and communicates with the inside. An opening 34 protruding above the rising portion 4b of the left side frame 4 is provided, and an air suction duct 35 is formed in the rear cover 21 so as to cover the opening 34, and the air suction duct 35 is opened forward 35a. have.

Therefore, the air sucked from the suction duct 35 on the side wall of the rear cover 21 enters the side frame 4 through the opening 34, then passes through the flexible duct 33, flows into the air cleaner 31, and flows through the duct 32 as clean air. To the carburetor 30.

An exhaust pipe 36 extending from the engine 10 passes below the right side of the engine 10 and communicates with a muffler 37 located on the right side of the rear wheel 12.

As shown in FIGS. 4 and 5, behind the helmet storage box 18, the side frame 4
A cross pipe 40 is erected between the right and left rising portions 4b, and a rear cushion mounting bracket 41 projects forward from the left end of the cross pipe 40, and the rear cushion mounting bracket 41 is attached to the rear cushion mounting bracket 41. The upper end is pivotally connected by a bolt 42.

In the cross pipe 40, a concave portion 40a is formed by crushing an upper half cylindrical portion in the center in the width direction on the right side of the rear cushion mounting bracket 41 downward.
A battery mounting housing 43 is mounted on the bracket 17, and its back wall is fixed to the vertical plate portion 17 b of the bracket 17 with bolts 49. The upper center of the rear wall 18a of the helmet storage box 18 is cut out, and the housing 43 is fitted into this cutout.

The front of the housing 43 is opened obliquely.
A battery 45 is inserted through the opening, and a maintenance lid 44 covers the front so as to be freely opened and closed. The maintenance lid 44 has a housing shape in which the rear is obliquely opened corresponding to the housing 43, and a locking piece 44b protruding from a lower end of the front wall 44a is locked in a notch of the helmet storage box 18. The rear end of the upper wall is screwed by a screw 80 to an upper wall portion 18b which is an extension of the rear wall 18a of the helmet storage box 18.

A cushion member 46 is fixed to the inner surface of the front wall 44a of the maintenance lid 44 so as to press down and fix the battery 45 mounted on the housing 43.
A pair of upper and lower engaging pieces 44c project inward at the center upper portion of the front wall 44a of the maintenance lid 44, and the spare fuse 47 is engaged from the inside.
Further, two circular holes 44d are formed on the left and right between the upper and lower engaging pieces 44c of the front wall 44a, so that both ends of the spare fuse 47 can be seen from the front, and a finger is inserted from the outside to insert the spare fuse 47. Can be removed from the engagement piece 44c.

An oil tank 48 is provided so that the cross pipe 40 is wrapped downward from the rear of the upper end of the rear cushion 13 behind the lower half of the housing 43 of the battery 45 and on the left side thereof.
Is disposed on the upper plate portion 23a of the rear ender 23. An oil cap 48a is located on the upper left side of the housing 43 of the oil tank 48.

In the space between the right end of the cross pipe 40 and the upper plate 23a of the rear end 23 on the right side of the oil tank 48, a canister 50 of the evaporative gas control device is disposed (FIG. 5). reference). A canister mounting bracket 51 is welded to the lower surface of the right end of the cross pipe 40 at an oblique angle with the back raised, and the front and rear ends of the bracket 51 are inserted into rubber bands 50a and 50b before and after the canister 50. The canister 50 is suspended.

That is, as shown in FIG.
Rear cushion 13 on the left and canister 50 on the right
However, they are mounted on the cross pipe 40 so as to overlap each other via a rear cushion mounting bracket 41 and a canister mounting bracket 51 in a side view.

On the other hand, the evaporative gas introduction pipe 52 extending from the fuel tank 15 is directed rearward along the right side frame 4, is horizontally bent leftward in front of the canister 50, and extends along the rear wall of the helmet storage box 18. The right side frame 4 is bent below the left side frame 4 in a hairpin shape, extends horizontally to the right again from the bent portion 52a, and bends rearward.
And is connected to the rear of a canister 50 suspended from the right end of the cross pipe 40 (see FIGS. 3 and 5). Note that a portion of the evaporative gas introduction pipe 52 running horizontally in the left and right direction is locked and fixed by a locking member 58 protruding from the upper plate 23a of the rear ender 23.

As described above, the evaporative gas introduction pipe 52 disposed along the right side frame 4 from the fuel tank 15 bypasses the middle to the left side frame 4 and reaches the canister 50 disposed again on the right side. Even when the vehicle body is turned to the right, the hairpin-shaped bent portion 52a is positioned at the highest position of the evaporative gas introduction path and the fuel tank 15 and the canister 50
At the bent portion 52a to prevent fuel leakage. Even if the vehicle body is turned to the left, the canister 50 itself is at a high position, and no fuel leakage occurs.

An evaporative gas purge pipe 54 extends separately from the rear of the canister 50, and the right side frame 4 is provided on the right side of the rear lower end of the right side wall of the helmet storage box 18.
Is connected to a purge control valve 55 which is fixedly disposed at the first position.

From the purge control valve 55, a purge pipe is connected to a duct 32 that connects the air cleaner 31 and the carburetor 30.
A negative pressure pipe 57 is provided from the purge control valve 55 to the downstream side of the carburetor 30, and the purge control valve 55 is operated via the negative pressure pipe 57.

Therefore, the fuel gas evaporated in the fuel tank while the vehicle is stopped is collected by the canister 50 through the evaporative gas introduction pipe 52, and the collected fuel gas is evaporated by the negative pressure of the engine intake system. The gas is sucked out through a purge control valve 55 through 56 and supplied for combustion.

A tail light 60 is provided behind the oil tank 48 and the canister 50. The grab rail mounting stay for connecting the rear ends of the left and right side frames 4
The upper edge of the taillight 60 is fixed to 61 by bolts 63, and the lower edge of the taillight 60 is fixed to the bracket 64 erected on the rear end 23 by bolts 65, and the taillight 60 is located at the rear opening of the rear cover 21. Has been supported.

The seat 27 covering the upper opening of the helmet storage box 18 is configured so that the front end of the seat bottom plate 70 is pivotally attached to the upper edge of the front wall of the helmet storage box 18 via a pivot 71 so as to be freely opened and closed. The rear end can be locked by a seat lock mechanism.

Hereinafter, the seat lock mechanism will be described in detail. As shown in FIG. 5, the grab rail mounting stay 61 is
It is installed between the rear end portions 4c of the left and right side frames 4, and is connected to each other and extends rearward. That is, the grab rail mounting stay 61 has a substantially U shape in a side view, and the upper plate portion 61a.
Forms a large opening 61d in the center, the left and right extend forward, and both ends are welded to the upper surfaces of the rear ends 4c of the left and right side frames 4, respectively, and the left and right are joined at the rear of the upper plate 61a. Bending downward to form a rear plate portion 61b, only the central portion of the rear plate portion 61b bends forward to form a lower plate portion 61c, and the front end portion of the lower plate portion 61c becomes wider right and left. And are welded to the lower surfaces of the rear ends 4c of the left and right side frames 4, respectively (see FIGS. 5 and 8).

Mounting holes 61e for mounting the rear cowl 90 and the grab rail 95 are formed in the left and right upper plate portions 61a of the grab rail mounting stay 61, respectively.

A rectangular engaging hole 72 is formed in the rear end 4c of the side frame 4 from the horizontal plate portion 17a to the vertical plate portion 17b of the bracket 17 provided forward and opposite to the grab rail mounting stay 61. A seat lock lever 73 is rotatably supported along the lower surface of the horizontal plate portion 17a by a support shaft 74.

The seat lock lever 73 is substantially L-shaped, and its bent portion is pivotally supported by a support shaft 74 to the right of the engagement hole 72, and one side body 73a extends rearward from this pivot support portion. The end of the other side body 73b protruding leftward is bent downward to form an engagement claw 73c, and the seat lock lever 73
With this rotation, the engaging claw 73c can be freely protruded and retracted below the engaging hole 72.

The horizontal plate portion 17a of the bracket 17 has an arc-shaped opening 83, and a pin 84 projecting upward from the seat lock lever 73 passes through the opening 83, and a spring 75 having one end locked at the upper end thereof. Locks the other end to a hook 85 which is formed by bending a part of the bracket 17 upward, and the spring 75 urges the seat lock lever 73 clockwise in a top view.

On the other hand, as shown in FIGS. 7 and 8, the rear cowl 90 mounted on the grab rail mounting stay 61 has a slightly curved upper plate portion 90a and a narrower width as it goes rearward. The end is bent downward to form a rear plate portion 90b diagonally forward. A key cylinder mounting hole 90c for fitting the key cylinder 76 is formed in the upper plate portion 90a slightly forward of the center.
A mounting hole 90d for mounting the 90 to the grab rail mounting stay 61 is formed. Side covers 92 are attached to the left and right sides of the rear cowl 90 so as to be connected.

Further, as shown in FIGS. 7 to 9, the grab rail 95 mounted on the rear cowl 90 is composed of an upper plate portion 95a and a lower plate portion 95b. The lower part 95b hangs obliquely forward and is further lowered slightly below the lower plate part 95b to form a flat hollow 95c between the two. In the lower plate part 95b,
Mounting holes 95d are formed on the left and right.

As shown in FIG. 9, the rear cowl 90 and the grab rail 95 are mounted on the grab rail mounting stay 61.
Are mounted one on top of the other. That is, first, a rear cowl in which the key cylinder 76 is mounted in the key cylinder mounting hole 90c.
Put the 90 on the grab rail mounting stay 61 and install the mounting hole 90d.
To the mounting hole 61e on the grab rail mounting stay 61 side, and then put the grab rail 95 on the rear cowl 90 so as to straddle the rear cowl 90, and align the mounting hole 95d with the two mounting holes 61e and 90d. A fixing bolt 96 is inserted from above, screwed with a nut 97, and fastened together (see FIG. 9).

Key cylinder mounted on rear cowl 90
Reference numeral 76 denotes a state in which it is suspended from the opening 61d of the grab rail mounting stay 61.

FIG. 7 is a side view of a main part in the state assembled above.
FIG. 8 shows a plan view. The key cylinder 76 has a cylindrical shape, and a groove 76b is formed in a circumferential direction along a flange portion 76a on the upper surface having a key insertion hole, while a one-step recessed inner peripheral edge is formed in a key cylinder mounting hole 90c of the rear cowl 90. As shown in FIG. 12, the key cylinder 76 is fitted into the key cylinder mounting hole 90c from above, and the flange portion 76a is supported in contact with the inner peripheral edge portion 90e of the mounting hole, as shown in FIG. The leaf spring 91 is inserted and a spring force is applied between the leaf spring 91 and the inner peripheral edge portion 90e of the mounting hole to urge the key cylinder 76 downward to be fixed.

The leaf spring 91 is obtained by bending a flat plate.
The opening 91a has a substantially U-shape in plan view as shown by a broken line in FIG.

The leaf spring 91 is inserted into the groove 76b of the key cylinder 76 inserted into the mounting hole 90c of the rear cowl 90 along the lower surface of the rear cowl 90 so as to be fitted in the opening 91a.
The key cylinder 76 has a flange portion 76a supported by a rear cowl 90 and is urged downward by a leaf spring 91 to be fixed at a fixed position.

Rear cowl 90 supporting key cylinder 76
Is fixed to the grab rail mounting stay 61 by the fixing bolt 96 and the nut 97 in the vicinity of the key cylinder 76, so that the key cylinder 76 maintains a firm fixed position,
And the mounting strength is extremely high.

A downwardly bent end 77a of the operating lever 77 projecting forward from the lower end of the key cylinder 76 is located on the left side of the end of the side body 73a extending rearward of the seat lock lever 73. When the key is inserted into the key insertion slot of the key cylinder 76 and turned clockwise, the operating lever 77 rotates clockwise to push the side body 73a of the seat lock lever 73,
The seat lock lever 73 is rotated counterclockwise against the spring 75, and the end engagement claw 73c of the other side body 73b is engaged with the engagement hole.
Move backward from the position below 72.

On the other hand, on the lower surface of the rear end of the seat bottom plate 70, an engagement hole is provided.
An engaging member 79 is provided vertically downward at a position corresponding to 72, and a locking claw portion 79a that projects rearward and tapers is formed at the lower end of the engaging member 79.

Open the helmet storage box 18 with a seat
When the cover 27 is closed, the engaging member 79 is inserted into the engaging hole 72, and the engaging claw 73 of the seat lock lever 73 located below the engaging hole 72.
c, the inclined surface of the lock claw portion 79a pushes backward to slightly rotate the seat lock lever 73, and returns by the spring 75 after passing through the protrusion of the lock claw portion 79a.
The engagement claw 73c is engaged with the engagement claw 73c to be in a locked state, so that the engagement member 79 does not fall out of the engagement hole 72 and the sheet 27 does not open.

The seat 27 itself is slightly urged upward by a spring (not shown).
The seat lock lever 73 is rotated by the
When the engagement between the engaging claw 73c and the engaging claw 79a is released, the seat 27 swings slightly upward to maintain the unlocked state.
By further swinging 27, the upper part of the helmet storage box 18 can be opened.

The key cylinder 76 must be mounted at a predetermined height in order to securely contact the operating lever 77 that rotates at the lower end of the key cylinder 76 with the seat lock lever 73. Since the key cylinder 76 is fixed to the upper plate of the rear cowl 90 having the upper plate fixed to the grab rail mounting stay 61, the key cylinder 76
Can firmly maintain a fixed position.

According to the present invention, the rear cowl upper plate provided with the key cylinder is fixed to the grab rail mounting stay on both sides of the key cylinder, and the seat lock lever is also provided on the vehicle body.
Both are pivotally supported by the lower surface of the bracket provided on the frame, and can be easily and reliably positioned, and the mounting strength can be increased. Since the operation lever and the seat lock lever of the key cylinder are engaged, the number of parts is small, the structure is simple, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a conventional seat lock structure.

FIG. 2 is a partially omitted overall side view of the scooter type motorcycle according to one embodiment of the present invention.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view of the main part.

FIG. 5 is a plan view of the main part.

FIG. 6 is a longitudinal sectional view of the same.

FIG. 7 is a sectional view of a main part.

FIG. 8 is a plan view of a main part.

FIG. 9 is a rear view, partially in section, showing an assembled state of a rear portion of the vehicle body.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Scooter type motorcycle, 2 ... Head pipe, 3 ... Down tube, 4 ... Side frame, 5 ... Handle, 6
... front fork, 7 ... front wheel, 8 ... link mechanism, 9 ...
Power unit, 10… Engine, 11… Power transmission device, 12
… Rear wheel, 13… rear cushion, 14… bracket, 15… fuel tank, 16… box mounting bracket, 17… bracket, 18… helmet storage box, 19… bracket, 20
... front cover, 21 ... rear cover, 22 ... step floor, 23 ... rear ender, 24, 25 ... bracket, 26 ... hanging member, 27 ... seat, 28 ... mudguard rubber, 30 ... carburetor, 31 ... air cleaner, 32… duct, 33… duct,
33 ... Flexible duct, 34 ... Opening, 35 ... Suction duct, 36 ... Exhaust pipe, 37 ... Muffler, 40 ... Cross pipe, 41
… Rear cushion mounting bracket, 42… Bolt, 43…
Housing, 44: Maintenance lid, 45: Battery, 46: Cushion member, 47: Spare fuse, 48: Oil tank, 49: Bolt, 50: Canister, 51: Canister mounting bracket, 52, 53: Evaporation gas introduction pipe, 54 ... Evaporation gas purge pipe, 55 ... Purge control valve, 56 ... Evaporation gas purge pipe, 57 ... Negative pressure pipe, 58 ... Locking member, 60 ... Tail light,
61: Grab rail mounting stay, 63: Bolt, 64: Bracket, 65: Bolt, 70: Seat bottom plate, 71: Axis, 72: Engagement hole, 73: Seat lock lever, 74: Support shaft, 75: Spring, 76 ... key cylinder, 77 ... operating lever, 79 ... engaging member, 80 ... screw, 81, 82 ... bolt and nut, 83 ... opening, 84
... Pin, 85 ... Hook, 90 ... Rear cowl, 91 ... Leaf spring, 92
... side cover, 95 ... grab rail. 96… fixing bolt,
97 ... nut.

Claims (1)

(57) [Claims] 1. A motorcycle provided with a seat detachably or openable and closable with respect to a vehicle body, an L-shaped bracket which is horizontally provided at a rear end of a vehicle body frame and is engaged at one end with a locking piece at a rear portion of the seat . An urging switch for pivotally supporting the seat lock lever on the lower surface of the bracket and urging the seat lock lever in one direction.
A pull cylinder is provided on the upper surface of the bracket, a key cylinder having an operating lever engaging with the other end of the seat lock lever is provided on the rear cowl upper plate, and the rear cowl upper plate is positioned on both sides with respect to the key cylinder.
A seat lock structure for a motorcycle, wherein a part of the seat lock structure is fastened together with a grab rail to a grab rail mounting stay at the rear of the body frame.