JP3961184B2 - Lid-like member mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an attachment structure for detachably attaching a lid-like member such as an air cleaner cover to a main body case of a portable power working machine or the like.
[0002]
[Prior art]
For example, in a portable power working machine such as a chainsaw, an internal combustion engine (air-cooled two-cycle gasoline engine) is mounted vertically in a body case as described in Japanese Utility Model Publication No. 3-13527. An air cleaner is disposed on the most upstream side (upper part of the fuselage) of the intake system of the internal combustion engine, and an air cleaner cover is attached to the main body case so as to cover the air cleaner.
[0003]
In this case, since the air cleaner often requires maintenance to remove clogging and the like, the air cleaner cover is required to be detachably attached to the main body case.
Conventionally, in order to detachably attach a lid-like member such as an air cleaner cover to a main body case of a portable power work machine or the like, it is common to use screws as described in the above publication. there were.
[0004]
[Problems to be solved by the invention]
However, when screws are used to attach the lid-like member, a considerable amount of force is required to tighten and loosen the screws, and it takes time, and the screws are separated from the lid-like member. Therefore, there is a problem that it is necessary to pay attention not to lose it when removing the lid-like member, and that the screws (heads) protrude outward from the lid-like member, which is in the way.
[0005]
The present invention has been made in view of the above-described problems. The object of the present invention is to easily attach and detach the lid-like member with a single touch, and the components can be separated from the main body case and the lid-like member. It is an object of the present invention to provide a lid-like member mounting structure that is not separated and does not get in the way.
[0006]
[Means for Solving the Problems]
In order to achieve the above-described object, the lid-like member mounting structure according to the present invention has an outer side of the lid-like member at the distal end portion of the detachable biasing member whose base end portion is swingably supported by the main body case. A press-fitting engagement piece pressed against the surface part is rotatably supported, and a fitting shaft-like part serving as a rotation fulcrum of the press-fitting engagement piece is placed on the one outer surface part of the lid-like member. A receiving wall portion with a wavy concave groove that is loosely fitted is projected outward, and the lid-like member is placed on an attachment port of the body case, and the body case is located at a place other than the one outer side surface portion. In the state of being engaged with the stopper, the pressure contact engagement piece is swung in the direction approaching the one outer side surface portion with the base end portion of the attaching / detaching biasing member as a fulcrum, and the attaching / detaching attachment Rotate the tip of the biasing member as a fulcrum, and place the fitting shaft-like part on the receiving wall part The lid-like member is moved to the one outer side surface side against the urging force of the attaching / detaching urging member with the fitting shaft-like portion as a fulcrum, and the lid-like member is moved to the main body case. On the contrary, the press-fitting engagement piece is rotated with the fitting shaft-shaped portion as a fulcrum so as to be separated from the one outer surface portion against the urging force of the attaching / detaching urging member . Thus, the lid-like member is detachably attached to the main body case of a portable power working machine or the like in which the lid-like member is detached from the main body case .
[0007]
Mounting structure of the lid-like member according to the present invention, the detachable biasing member is Ri Do a coil spring, the pressure contact engagement piece is a side view substantially triangular shape when viewed from front substantially rectangular, said first outer surface portion A central wall extending obliquely downward and rearward from the upper end of the front portion pressed against the inner wall, inner vertical wall portions provided at the lower left and right ends of the central wall portion, and the coil spring loosened outside the inner vertical wall portion An outer vertical wall portion provided at intervals to pass through, and in a state where the lower end portion of the central wall portion is pressed against the press-contacting engagement piece to the one outer side surface portion, It is characterized in that there is provided a finger hook portion for pulling the combined piece in the direction of separating from the one outer surface portion .
[0008]
In another preferred embodiment, an accommodating portion in which the press-fitting engagement piece is substantially completely accommodated is provided on one outer side surface portion of the lid-shaped member.
Examples of the lid-like member include an air cleaner cover that covers an air cleaner of an internal combustion engine built in a main body case of a portable power working machine such as a chain saw.
[0009]
Furthermore, in another preferable aspect, the press-contacting engagement piece and the attaching / detaching urging member are arranged at a rear portion of the main body case.
In another preferred aspect, the press-fitting engagement piece and the attaching / detaching urging member are disposed on the left and right side surfaces of the main body case.
[0010]
In a preferred embodiment of the lid-shaped member mounting structure according to the present invention configured as described above, when the lid-shaped member is mounted on the main body case, the lid-shaped member is placed on the mounting opening of the main body case. In addition, in a state in which the press-engaging engagement piece is pushed with a finger in a state in which the engagement is performed at a place other than the one outer side surface portion, the one outer side is formed with the base end portion of the attaching / detaching biasing member as a fulcrum. By swinging in a direction approaching the surface portion and turning about the tip of the attaching / detaching biasing member, the fitting shaft-like portion is put on the receiving wall portion and fitted, and thereafter Then, the press-contact engagement piece is rotated with the fitting shaft-shaped portion as a fulcrum so as to be tilted toward the one outer side surface portion against the urging force of the detachable urging member.
[0011]
At the time of this rotation, the distal end portion is disengaged from the proximal end portion due to the over-centered positional relationship between the fitting position of the fitting shaft-like portion and the distal end portion and the proximal end portion of the detachable biasing member. The urging member for attachment and detachment is pushed up in the direction of moving away, and the spring force starts to be effective, and then the press-fitting engagement piece is further rotated so that the tip end portion is connected to the fitting shaft-like portion and the base When a line (dead center) connecting the end portions is exceeded, the cap member is brought into pressure contact with the one outer side surface portion by the spring force, and the cap-like member is held by the spring force of the attaching / detaching biasing member at this time Is firmly attached and fixed so as to be pressed against the main body case (the one outer surface portion).
[0012]
In this attached and fixed state, the pressure contact engagement piece is pressed against the outer surface of the lid member by the spring force of the detachable biasing member, so the pressure contact engagement piece is externally applied. As long as a pulling force is not applied, the one outer surface portion is not separated.
[0013]
On the other hand, contrary to the above, when removing the lid-shaped member from the main body case, the finger contact portion is provided on the finger contact portion provided on the pressure contact engagement piece so that the pressure contact engagement piece is fitted. With the shaft-shaped portion as a fulcrum, the pressure-engaging engagement piece is separated from the receiving wall portion by rotating so as to be separated from the one outer surface portion against the urging force of the attaching / detaching urging member, The lid-like member is removable from the main body case.
[0014]
As described above, in the lid-shaped member mounting structure according to the present invention, the lid-shaped member can be easily attached and detached with a single touch, and components such as the press-contact engagement piece and the detachable biasing member are provided in the body case and It does not separate from the lid-like member and can be prevented from getting in the way.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a partially cutaway left side view showing an example of a chain saw that is one of portable power working machines, in which the lid-like member mounting structure 10 according to the first embodiment of the present invention is employed.
[0016]
The illustrated chain saw 1 includes a main body case 2 made of synthetic resin, and includes a guide bar 101 and a saw chain 102 as working portions in a state of projecting forward on the right side of the front end portion of the main body case 2. A saw chain set 100 is attached and a rear handle 4 provided with a lock release lever 16 and a throttle lever 17 of a carburetor throttle valve is disposed at the rear of the main body case 2, and the others are not shown. A front handle, a hand guard, and the like are provided at the front of the main body 2.
[0017]
Further, an internal combustion engine (air-cooled two-cycle gasoline engine) 5 is mounted in the main body case 2 in a cylinder vertical position, and an air cleaner is provided at the uppermost stream of the intake system 6 of the internal combustion engine 5 (upper part of the main body case 2). 7 is disposed, and an air cleaner cover 20 is attached as a lid-like member to an attachment port 12 provided near the rear upper surface of the main body case 2 so as to cover the air cleaner 7.
[0018]
The air cleaner cover 20 has a front side surface portion 21, left and right outer side surface portions 22, 22, a rear outer side surface portion 24, and an internal partition wall portion 23. On the left and right, hook portions 25 and 25 are provided to be hooked on the hook portions 14 and 14 provided on the left and right of the front portion of the mounting opening 12 of the main body case 2 (see also FIG. 2).
[0019]
Further, on the left and right of the rear end portion of the upper surface of the main body case 2, as can be understood with reference to FIGS. Mounting portions 41 and 41 of pins 42 and 42 for swingably supporting 51 are provided, and loop-shaped tip portions 52 and 52 of the coil springs 50 and 50 are provided on the rear outer surface portion 24 of the lid-like member 20. A press-fitting engagement piece 30 to be brought into press-contact is rotatably supported.
[0020]
The press-contact engagement piece 30 has a substantially rectangular shape in a front view and a substantially triangular shape in a side view, and a central wall portion 31 extending obliquely downward and rearward from the upper end of a front surface portion 30A that is pressed against the one (rear) outer surface portion 24, outer among vertical wall portion 33, 33 provided in the lower left and right ends of the central wall portion 31 and, digits set apart for passing loosely the coil spring 50, 50 on the outer side of the inner vertical wall 33 The front wall portion 30A of the central wall portion 31 is formed with a hollow groove-shaped concave portion 38, and the lower end portion of the central wall portion 31 is connected to the press-fitting engagement piece 30 as described above. In the state in which it is brought into pressure contact with the one outer surface portion 24, it is a finger hook portion 31a for pulling the pressure contact engagement piece 30 in the direction of separating from the one outer surface portion 24.
[0021]
Further, between the upper ends of the outer vertical wall portions 32, 32 and the inner vertical wall portions 33, 33, a pivot pin 45, on which the distal end portions 52, 52 of the coil springs 50, 50 are loosely fitted, 45 is inserted.
Furthermore, fitting shaft-like portions 35 and 36 that serve as pivot points of the pressure-engaging engagement pieces 30 are provided on the same horizontal axis at the lower ends of the outer vertical wall portions 32 and 32 and the inner vertical wall portions 33 and 33. Are provided respectively. The inner fitting shaft-like portion 36 is protruded inward from the inner vertical wall portions 33 and 33.
[0022]
On the other hand, as shown in FIGS. 6 to 8 in addition to FIGS. 2, 3, and 5, the rear outer surface portion 24 of the air cleaner cover 20 can be rotated. Outer L-shaped wall portions 26 and 26 provided with wavy concave groove receiving wall portions 26a and 27a on which the fitting shaft-like portions 35 and 36 serving as moving fulcrums are placed from the upper side and are loosely fitted, and an inner support. Wall parts 27 and 27 are projected rearward.
[0023]
A space sandwiched between the outer L-shaped wall portions 26, 26 serves as an accommodating portion 24A in which the pressure-engaging engagement piece 30 is substantially completely accommodated.
The inner support wall portions 27, 27 are provided with the inner fitting shaft portions 36, 36 on the rear side of the receiving wall portion 27a with the wavy concave groove to be loosely fitted, and the locking wall portion 27b. Is erected.
[0024]
In the lid member mounting structure 10 of the present embodiment configured as described above, the air cleaner cover 20 is attached to the main body case 2 when the air cleaner cover 20 is mounted to the main body case 2. While being put on the mouth 12, the hook portions 25, 25 of the air cleaner cover 20 are inserted into the hook portions 14, 14 provided on the main body case 2 from the rear to prevent the hook from being removed. As shown in FIG. 8, the pressure contact engagement piece 30 is pushed with a finger (P arrow in the figure), and the rear outer surface portion 24 with the base end portions 51 and 51 of the coil springs 50 and 50 as fulcrums. The fitting shaft-like portions 35 and 36 are swung in the direction approaching the other end portions 52 and 52 to turn the fitting shaft portions 35 and 36 on the receiving wall portions 26a and 27a. After that, as shown in FIG. 7, the press-fit engagement piece 30 is opposed to the biasing force of the coil springs 50 and 50 with the fitting shaft portions 35 and 36 as fulcrums. Then, it is rotated so as to be tilted toward the rear outer surface portion 24 side.
[0025]
At the time of this rotation, the over-centered positional relationship between the fitting position of the fitting shaft-like portions 35 and 36 and the distal end portions 52 and 52 and the proximal end portions 51 and 51 of the coil springs 50 and 50. From the above, the distal end portions 52, 52 are pushed up in the direction away from the proximal end portions 52, 52, the coil springs 50, 50 are expanded and the spring force starts to work, and then the press-contact engagement piece 30 is further rotated. When the distal end portions 52 and 52 cross a line (dead center) connecting the fitting shaft-like portions 35 and 36 and the proximal end portions 51 and 51 by being moved, the rear outer surface portion 24 is caused by the spring force. The air cleaner cover 20 is pressed against the main body case 2 (the rear outer surface 24) by the spring force of the coil springs 50 and 50 at this time. Is way, it is securely attached and fixed.
[0026]
In this attached and fixed state, the pressure contact piece 30 is pressed against the rear outer surface portion 24 of the air cleaner cover 20 by the spring force of the attaching / detaching biasing member. The engagement piece 30 does not leave the rear outer surface portion 24 unless a pulling force is applied from the outside.
[0027]
On the other hand, when the air cleaner cover 20 is removed from the main body case 2, on the other hand, as shown in FIG. 6, the air cleaner cover 20 is provided at the lower end portion of the central wall portion 31 of the press-fitting engagement piece 30. in the manner as hooking the finger U to the finger hook portion 31a, the pressure contact engagement piece 30 as a fulcrum the fitting shaft-like portion 35 and 36, against the urging force of the coil spring 50, 50, the one By rotating so as to be separated from the outer side surface portion 24 (Q arrow in the figure), as shown in FIGS. 7 and 8, the pressure contact piece 30 is separated from the receiving wall portions 26a and 27a, and the air The cleaner cover 20 is removable from the main body case 2.
[0028]
As described above, in the mounting structure 10 of the present embodiment, the air cleaner cover 20 can be easily attached and detached with one touch, and the components such as the press-contact engagement piece 30 and the attaching / detaching biasing member 50 are provided in the main body case. 2 and the air cleaner cover 20 are not separated from each other, and can be prevented from getting in the way.
[0029]
9 and 10 show another embodiment of the lid-shaped member mounting structure according to the present invention.
In this embodiment, the left and right side portions 22, 22 of the main body case 2 have a pressure contact engagement piece 70 having a generally rectangular shape in front view and a triangular shape with rounded corners in side view, and a coil spring as the detachable biasing member. 50 is disposed, and the left and right outer side surface portions 22 and 22 of the air cleaner cover 20 are provided with a receiving portion 22A in which the press contact engagement piece 70 is substantially completely received.
[0030]
A loop base end portion 51 of the coil spring 50 is swingably supported by a pivot pin 44 provided on a side portion of the main body case 2, and a loop tip end portion 52 of the coil spring 50 is in contact with the pressure contact. The engagement piece 70 is loosely fitted on a pin 82 disposed on an upper portion of a recess 74 provided at a lower center portion of the engagement piece 70.
A cutout opening 18 that allows the coil spring 50 to swing is formed in a side portion of the mounting opening 12 of the main body case 2.
[0031]
A fitting shaft-like portion 71 (lower end portion) serving as a rotation fulcrum of the pressure-engaging engagement piece 70 is placed on the bottom portion of the housing portion 22A in the outer side surface portion 22 of the air cleaner cover 20 to be loosely fitted. A receiving wall portion 28 having a wavy concave groove is provided.
Further, a concave for facilitating the hooking of the finger U on the finger hooking portion 73 on the top of the press-fitting engagement piece 70 so as to be recessed inwardly above the accommodating portion 22A in the outer side surface portion 22 of the air cleaner cover 20. A groove 29 is formed.
[0032]
Even in the lid-shaped member mounting structure 60 of the second embodiment configured as described above, the air cleaner cover 20 is mounted to the main body case 2 in substantially the same manner as in the first embodiment. While the cleaner cover 20 is put on the mounting opening 12 of the main body case 2 and is engaged with the stoppers at positions other than the left and right outer surface portions 22, the pressure contact engagement piece 70 is connected to the base end of the coil spring 50. It swings in the direction approaching the left and right outer side surface portion 22 with the portion 51 as a fulcrum, and rotates with the tip end portion 52 as a fulcrum against the urging force of the coil spring 50, and its fitting shaft shape The portion 71 is put on the receiving wall portion 28 to be fitted, and the air pressure engagement piece 70 is tilted toward the left and right outer side surface portion 22 with the fitting shaft portion 71 as a fulcrum. The cleaner cover 20 is attached and fixed to the main body case 2, and conversely, the finger hooking portion 73 at the top of the press-contacting engagement piece 70 is pulled outward with a finger U, and the fitting shaft portion 71 is used as a fulcrum. The air cleaner cover 20 is removed from the main body case 2 by rotating the coil spring 50 against the urging force of the coil spring 50 so as to be separated from the left and right outer surface portions 22.
[0033]
Therefore, even with the mounting structure 60 of the second embodiment, the air cleaner cover 20 can be easily attached and detached with a single touch, and components such as the pressure-engaging engagement piece 30 and the attaching / detaching urging member 50 can be attached to the main body case 2. In addition, the air cleaner cover 20 is not separated from the air cleaner cover 20, and the air cleaner cover 20 can be kept out of the way.
[0034]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately changed in design without departing from the spirit of the invention described in the claims. It is.
For example, in the above-described embodiment, the case where the present invention is applied to a chainsaw has been described. However, as a portable power working machine, the present invention can be similarly applied to an engine cutter, a hedge trimmer, and the like in addition to a chainsaw.
[0035]
【The invention's effect】
As can be understood from the above description, according to the lid-shaped member mounting structure of the present invention, it is possible to easily attach and detach a lid-shaped member such as an air cleaner cover with one touch. Components such as the detachable urging member are not separated from the main body case and the lid-like member, and can be prevented from getting in the way.
[Brief description of the drawings]
FIG. 1 is a partially cutaway left side view showing an example of a chain saw as a portable power working machine to which an embodiment of a lid-shaped member mounting structure according to the present invention is applied.
FIG. 2 is a perspective view showing an attachment structure of the lid-like member shown in FIG.
FIG. 3 is a rear view showing a mounting structure of the lid-like member shown in FIG.
4 is a perspective view showing a pressure contact engagement piece used in the lid-shaped member mounting structure shown in FIG. 1. FIG.
5 is a perspective view showing a state before attachment in the lid-like member attachment structure shown in FIG. 1; FIG.
FIG. 6 is a cross-sectional view for explaining an attachment state in the lid-like member attachment structure shown in FIG. 1;
7 is a cross-sectional view for explaining an intermediate state of attachment in the lid-like member attachment structure shown in FIG. 1;
8 is a cross-sectional view for explaining an attachment start state in the lid-like member attachment structure shown in FIG. 1;
FIG. 9 is a perspective view showing the periphery of an air cleaner cover of a chainsaw to which another embodiment of a lid-shaped member mounting structure according to the present invention is applied.
10 is a cross-sectional view taken along the line XX in FIG. 9, and is a cross-sectional view used for explaining an attaching / detaching operation in the attaching structure of the lid-like member.
[Explanation of symbols]
1 Chain saw (portable power machine)
2 Body case 5 Internal combustion engine 7 Air cleaner 10 Mounting structure 12 Mounting port 20 Air cleaner cover (lid member)
22 Left and right outer surface portions 24 Rear outer surface portions 22A and 24A Accommodating portions 26a and 27a Receiving wall portions 30 and 70 Pressure engagement pieces 31a Finger hook portions 35 and 36 Fitting shaft-shaped portions 50 Coil springs (removable biasing members)
51 proximal end 52 distal end

Claims (5)

The tip end portion of the main body casing base portion (2) (51) biasing member with a detachable, which is swingably supported (50) to (52), to an outer surface of the cap-like member (20) (24) A press-fitting engagement piece (30) to be brought into press-contact is rotatably supported, and a rotation fulcrum of the press-fitting engagement piece (30) is attached to the one outer side surface portion (24) of the lid-like member (20). Receiving wall portions (26a, 27a) having wavy concave grooves on which fitting shaft-like portions (35, 36) to be fitted and loosely fitted are projected outward, and the lid-like member ( 20) is placed on the mounting opening (12) of the main body case (2) and is engaged with the main body case (2) in a position other than the one outer side surface portion (24). Using the base end (51) of the detachable biasing member (50) as a fulcrum, the outer surface portion (24 And the pivoting member (50) is pivoted about the tip (52) as a fulcrum, and the fitting shafts (35, 36) are moved to the receiving wall ( 26a and 27a), and the press-fitting engagement piece (30) is opposed to the urging force of the attaching / detaching urging member (50) with the fitting shaft portion (35, 36) as a fulcrum. The lid-like member (20) is attached and fixed to the main body case (2) by tilting toward the one outer side surface portion (24), and conversely, the press-fitting engagement piece (30) is fitted to the fitting shaft. The lid-like member (20) is rotated by using the shaped portions (35, 36) as fulcrums so as to be separated from the one outer side surface portion (24) against the urging force of the attaching / detaching urging member (50). ) is a portable power working machine is to be detached from the main body case (2) (1 Wherein a mounting structure for mounting the lid-like member (20) detachably to the main body case (2) etc.,
The attaching / detaching biasing member comprises a coil spring (50),
The press-fitting engagement piece (30) has a substantially rectangular shape in front view and a substantially triangular shape in side view, and a central wall portion extending obliquely downward and rearward from the upper end of the front face portion (30A) pressed against the one outer side face portion (24). (31), inner vertical wall portions (33, 33) provided at the lower left and right ends of the central wall portion (31), and the coil springs (50, 50) outside the inner vertical wall portion (33). Outer longitudinal wall portions (32, 32) provided at intervals to pass the
In the state in which the lower end portion of the central wall portion (31) is pressed against the press-contacting engagement piece (30) and the one outer surface portion (24), the press-contacting engagement piece (30) is placed on the one end. An attachment structure for a lid-like member, characterized in that a finger hook portion (31a) is provided for pulling in a direction away from the outer side surface portion (24) . An accommodation portion (22A, 24A) in which the press contact engagement piece (30, 70) is substantially completely accommodated is provided on one outer side surface portion (22, 24) of the lid-like member (20). The lid-shaped member mounting structure according to claim 1 . The lid member is an air cleaner cover (20) that covers an air cleaner (7) of an internal combustion engine (5) built in the main body case (2) of the portable power work machine (1). The lid-shaped member mounting structure according to claim 1 or 2 . The press-fitting engagement piece (30) and the urging member for attachment / detachment (50) are arranged at the rear part of the main body case (2), according to any one of claims 1 to 3. The attachment structure of the lid-like member. Claims 1 to 3, characterized in that the left and right side surface portions (22, 22) to said pressure contact engagement piece (30) and the biasing member for the detachable (50) is Zaisa distribution of the main body case (2) The lid-shaped member mounting structure according to any one of the above.

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