JPH056737Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention includes a pedestal having a concave portion that opens upward at the end of the grass collection duct on the grass collection container side that guides cut grass to the grass collection container; The present invention relates to a grass collection duct support structure for a lawn mower that is configured to be supported and fixed while being inserted into a duct insertion opening formed between the grass collection container opening/closing cover having a downwardly opening recess.

[Conventional technology]

As a grass collection duct support structure for this type of lawn mower,
Conventionally, [1] two protrusions are arranged side by side over approximately half of the outer circumference of the grass collection duct, the remaining half of the circumference is formed into a smooth circular surface, and the protrusions are provided outside the duct insertion opening of the grass collection container. The upper end edge of the upwardly directed recess of the side bracket is formed so that it can be supported from below by being inserted into the engaging groove formed by the protrusion, and the upper end edge of the upwardly facing recess of the side bracket is inserted into the engaging groove. In this state, the grass collection duct is placed on the side bracket, and in that state, the grass collection duct is fixed by wrapping around the smooth circumferential surface of the grass collection duct and connecting and fixing both ends to the side bracket. , equipped with a rubber fastener, and with the grass collection duct attached and fixed to the side bracket using the rubber fastener, the downward concave part of the opening/closing cover is brought into contact with the rubber fastener, and the side bracket is turned upward. The structure was such that the grass collection duct was clamped and fixed in cooperation with the recess (see, for example, Japanese Patent Application Laid-Open No. 61-35718).

[2] A wide annular groove is formed on the outer peripheral surface of the grass collection duct near the discharge end, and a wide annular groove is formed around the entire circumference of the grass collection duct, and a wide annular groove is formed in the frame provided outside the duct insertion opening of the grass collection container. A bracket having an arc-shaped abutment part is fixed so as to be in contact with half of the outer circumference of the grass collection duct, and the bracket is wrapped around the remaining half of the grass collection duct in the annular groove, and both ends of the bracket are wrapped in the annular groove. A spring is provided to connect and fix the grass collection duct to the bracket, and the end of the grass collection duct is tightened and fixed by this bracket and spring, and the end side of the grass collection duct is inserted into the grass collection container beyond the tightened part (for example, in the United States) Patent No.
4532756).

The techniques shown in [1] and [2] above were known.

[The problem that the idea attempts to solve]

In the case of the structure described in [1] above, when removing the grass collection container from the machine and discharging the grass clippings outside the machine, first tighten the rubber After removing the tool, it was necessary to pull out the grass collection duct from the engagement groove, making the operation complicated.

In addition, in the configuration described in [2] above, when removing the grass collection duct, first,
After removing the rubber fastener, it is necessary to take out the grass collection duct from the engagement groove, which is a complicated process.Moreover, since the annular groove is formed on the outer circumferential surface of the duct, it is necessary to remove the annular groove from the inside of the duct. If the duct is formed by punching out in the opposite direction, it will cause resistance to the discharged grass, and if the duct is formed by reducing the thickness of the duct, the strength of the duct will decrease.

The purpose of the present invention is to perform a simple modification to form an engagement groove at the end of the grass collection container on the side of the grass collection container, and to rationally configure the structure for fixing the grass collection duct to the pedestal. In this way, we have solved the conventional drawbacks and simplified the duct support structure, and also made it possible to easily attach and detach the duct, and at the same time, to improve the strength of the grass collecting duct at the end of the grass collecting container. It is in the point of providing.

[Means to solve the problem]

The characteristic configuration of the present invention for achieving the above object is that the end of the grass collection duct on the grass collection container side that guides the grass clippings to the grass collection container is provided with a pedestal having a recess that opens upward, and a pedestal that has a recess that opens downward. A grass collection duct support structure for a lawn mower that is configured to be supported and fixed in a sandwiched state with a grass collection container opening/closing cover having a recessed part, which is provided with the configurations described in [A] to [C] below. It is.

[B] Arrange the tip of the grass collection duct so that it reaches a position corresponding to the upper part of the grass collection container, and extend the entire circumference of the outer peripheral surface of the grass collection duct at a position corresponding to the opening/closing cover recess and the pedestal recess. Two annular protrusions projecting outward from the outer peripheral surface of the duct in a brim-like manner are arranged side by side.

[B] A downward recess of the opening/closing cover at a position corresponding to the two annular projections is formed on a flat surface that abuts the periphery of the two annular projections from above.

[C] A mounting surface capable of supporting the grass collection duct from below with the upper edge of the upward concave portion of the pedestal being engaged in the engagement groove formed between the annular protrusions. It is formed in

[Effect]

(a) Since the grass collection duct is supported and fixed to the pedestal and the opening/closing cover in a sandwiched state with an intervening engagement structure, the grass collection duct is supported and fixed to the pedestal and the opening/closing cover in a sandwiched state, so as in the conventional structure, when the opening/closing cover is opened, The support structure of the grass collection duct is better than the one in which the grass collection duct can be removed only after removing the rubber or other elastic fasteners provided on the duct support structure provided separately from the grass collection container. It is not only simple, but also easy to attach and detach. In other words, the duct does not require any special support other than the grass collection container.
The annular protrusion is inserted and supported in the upwardly directed recess of the pedestal, and its tip is inserted into the grass collection container and supported. Therefore, the duct does not fall just by opening and closing the opening/closing cover, and the duct only needs to be lifted a little to remove it, so operability is excellent in this respect.

(b) With respect to the annular protrusions on the outer periphery of the grass collection duct, the cradle side located on the lower side has an upward recess that can be engaged in the engagement groove between the annular protrusions, and the opening/closing cover side located on the upper side has an upward recess that can be engaged with the engagement groove between the annular protrusions. Since it does not have a structure that fits into the engagement groove, but has a flat surface that comes into contact with the periphery of the annular protrusion, it can reliably regulate the position in the length direction of the duct and improve the sealing performance of the duct attachment part. We can achieve this together.

In other words, on the pedestal side located on the lower side of the duct, the upward recess engages in the engagement groove, but compared to the case where this engagement structure is provided on the upper side of the duct, Using the weight of both the duct and the opening/closing cover, it is easier to engage more reliably. In addition, a labyrinth-like seal structure is formed at the engagement portion between the upper end edge of the pedestal and the engagement groove, and a good sealing effect is exhibited against the escape of cut grass.

The opening/closing cover side located on the upper side of the duct does not have a structure that engages with the engagement groove, but forms a contact surface with the peripheral edge of the annular protrusion, so it is not formed on the upper side of the duct where a large amount of grass clippings and dust fly. Even if grass clippings and dust are deposited in the entrance groove, there is not much growth of the deposits on the periphery of the narrow annular protrusion, so there is a risk that the deposits will interfere with the growth. The opening/closing cover can be closed reliably with less risk of leakage, and in addition, the sealing effect can be easily enhanced due to the fact that the flat surface of the opening/closing cover and the two annular protrusions come in contact with each other at two locations.

(c) The engaging portion of the grass collection duct supported by the pedestal is not formed by a groove that recesses the outer circumferential surface of the duct, but is formed by an annular protrusion that protrudes from the outer circumferential surface. Therefore, the engagement groove can be formed without changing the cross-sectional shape of the flow path inside the duct, and the annular protrusion for forming the groove does not come into contact with the opening/closing cover on the upper side of the duct. It serves as a means to prevent dust and the like from accumulating on the surface for the time being, and also functions as a reinforcing rib, making it possible to strengthen the supported portion of the grass collection duct in a limited manner.

[Effect of idea]

Therefore, while the grass collection duct installation structure has a high sealing performance and high support strength, it is possible to consider the ease of attaching and removing the grass collection duct, and it is a more useful grass collection duct compared to the conventional structure. We have now been able to provide a supporting structure.

〔Example〕

As shown in FIG. 6, the riding lawn mower is equipped with a downward output shaft engine 1 at the front of the machine body, a transmission case 2 at the rear of the machine body, a driving operation section 3 between them, and front and rear wheels 5, 6. A mid-mounted mower 7 is provided in between, and an external grass collection duct 9 is provided to guide the cut grass from the mower 7 to a grass collection container 8 connected to the rear end of the machine.

Next, the mounting structure of the grass collecting container 8 will be explained. 1st
As shown in the figures or FIG. 4, a main frame 11 has a support frame 10 made of a pipe that can be inserted into the rear opening ends 11A of the left and right main frames constituting the aircraft body.
An engagement pin 1 that passes through both while connected to the
2, the fixed frame 13 is connected and fixed to the raised upper opening end 10A of the support frame 10 for mounting and supporting a pair of left and right grass collecting containers 8, 8 to be described later. has been done. In this connection and fixing structure, a pair of left and right pipe engaging portions 13a projecting downward from the fixed frame 13 are fitted into the upper open end 10A of the support frame 10. The fixed frame 13 is formed into a substantially E-shape in plan view by a U-shaped pipe frame 13A in plan view and a central channel frame 13B, and extends rearward in a cantilevered manner. Grass collection is carried out so that the cap 8A provided at the periphery of the upper end opening of the upward-opening grass collection container 8 is placed and abutted against the fixed frame 13 from above over the entire length of the pipe frame 13A and channel frame 13B. Container 8 is set. The upper surface 13C of the channel frame 13B, which supports the adjacent mouth side portions 8a, 8a of the two grass collection containers 8, 8, is wide and flat on its entire surface. A plate-like member 14 having an engagement hole 14a bored through the mouthpiece 8A of the grass collecting container 8 extends through the grass collecting back portion, and a projecting piece 13b is provided on the pipe frame 13A portion of the fixed frame 13. When the grass collecting container 8 is placed on the fixed frame 13, the protruding piece 13b engages with the engagement hole 1.
4a, and the position of the grass collecting container 8 is regulated.

Next, the opening/closing cover 15 for the left and right grass collecting containers 8, 8 will be explained. A pair of left and right brackets 1 are provided with horizontal engagement holes 16a in the lower flange portion 15A of the opening/closing cover 15 on the side of the support frame 10.
6 and 16 are fastened and fixed, and a plate piece 17 on which a headed pin 17a is fixed and protruded sideways is provided on the support frame 10, and the pin 17
By fitting and fixing a into the engagement hole 16a, the opening/closing cover 15 can swing up and down around the pin 17a. By placing the opening/closing cover 15 on the fixed frame 13 or the grass collection container 8 fitting and sliding it laterally, the pin 17a is fitted into the engagement hole 16a, and the opening/closing cover 15 is attached. A simple installation method can be used. On the other hand, a hook 18 is provided at the lower end of the opening/closing cover 15 opposite to the side where the bracket 16 is present, and a stopper 19 whose one end is fixed to the channel frame 13B on the fixed frame 13 side is latched to the hook 18. , is configured to maintain the closed position of the open/close cover 15.
The opening/closing cover 15 covers the upper space of the grass collecting containers 8, 8 in a communicating state, and the air exhaust passage A communicates from the upper space to the rear space in the internal space.
A net-like body 20 is stretched to form a net-like body 20, and air is exhausted from this net-like body 20 when the grass clippings are full or when a garbage storage bag with poor ventilation is used in the grass collecting container 8.
The opening/closing cover 15 is configured to exhaust air from an opening B at the lower end along the inner surface of the openable cover 15. however,
When the garbage storage bag is not used, the air is exhausted from the grass collecting bag.

Next, as shown in FIGS. 1 and 5, the attachment structure of the rear duct 9A located on the grass collection container side of the grass collection duct to the opening/closing cover 15 will be described in detail. The pipe frame 13A of the fixed frame 13 is provided with a plate-shaped pedestal 21 having a recess 21a that opens upward, and a recess 1 that opens downward in a corresponding portion of the pedestal 21 on the side surface of the opening/closing cover 15.
5a is provided, and the tip of the grass collection rear duct 9A enters into the opening formed by the recess 21a of the pedestal 21 and the recess 15a of the cover 15 in the closed position to a position corresponding to the upper part of the grass collection container 8. While the grass collection rear duct 9A is inserted in the state that
A pair of left and right annular protrusions 22, 22 project outward from the outer circumferential surface of the duct in a brim shape over the entire circumference of the outer circumferential surface of the rear duct 9A at positions corresponding to the opening/closing cover recess 15a and the pedestal recess 21a. An engagement groove 22a is formed between the pair of annular protrusions 22, 22. A mounting surface that can be supported from below while engaged in the engagement groove 22a is formed on the upper edge of the pedestal 21 that has the pedestal side recess 21a, and a downward recess 15a of the opening/closing cover 15.
is formed on a flat surface that is brought into contact with two annular protrusions 22, 22.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

The drawings show an embodiment of the grass collection duct support structure for a lawn mower according to the present invention, FIG. 1 is an exploded perspective view showing how the grass collection duct and the opening/closing cover are attached to the fixed frame, and FIG. 2 shows the grass collection duct, 3 is a plan view showing how the grass collection duct is attached to the opening/closing cover; and FIG. 4 is an enlarged view of the main parts showing the attachment structure of the opening/closing cover to the fixed frame. 5 is a longitudinal sectional side view, FIG. 5 is a longitudinal sectional front view showing how the grass collection duct and the opening/closing cover are attached to the fixed frame, and FIG. 6 is a side view of the riding lawn mower. 8... Grass collection container, 9... Grass collection duct, 15...
Opening/closing cover, 15a... Opening/closing cover recess, 21...
... pedestal, 21a... pedestal recess, 22... annular projection, 22a... engagement groove.

Claims (1)

[Claims for Utility Model Registration] A concave portion 21a that opens upward at the grass collection container side end of the grass collection duct 9 that guides the cut grass to the grass collection container 8.
and a recess 15 that opens downward.
It is configured to be supported and fixed in a sandwiched state with the grass collection container opening/closing cover 15 provided with a, and
A grass collection duct support structure for a lawn mower having the configurations described in [A] to [C] below. [B] The tip of the grass collection duct 9 is arranged so as to reach a position corresponding to the upper part of the grass collection container 8, and the outer periphery of the grass collection duct 9 is located at a position corresponding to the opening/closing cover recess 15a and the pedestal recess 21a. Two annular protrusions 22, 2 protrude outward from the outer peripheral surface of the duct in a brim shape over the entire circumference of the surface.
2 are placed side by side. [B] A downward recess 15 of the opening/closing cover 15 at a position corresponding to the two annular protrusions 22, 22.
a is formed as a flat surface that comes into contact with the periphery of the two annular protrusions 22, 22 from above. [C] The upper end edge of the upward concave portion 21a of the pedestal 21 is connected to the annular protrusion 22,
The grass collection duct 9 is formed as a mounting surface that can support the grass collection duct 9 from below while being engaged in the engagement groove 22a formed between the grass collection ducts 22a and 22a.