JP2000344143A - Floor structure of industrial vehicle - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To achieve low vibration while improving the strength and rigidity of a floorboard. SOLUTION: A cabin 7 having a cab side member 8, a pedal mount bracket 12, and the like as a frame member is elastically supported so as to be able to float on a vehicle body frame via four front and rear insulators. The left and right ends of the floorboard 16 divided into a front floorboard 19 and a rear floorboard 20 are supported by the cab side member 8, and the center is a pedal mount bracket 12.
And the bolt 2 inserted into the embossed portion 24
At 5, fix it to the pedal mount bracket 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor structure of an industrial vehicle typified by a forklift, and more particularly to vibration transmission from an engine or a transmission while improving the rigidity and strength of a floorboard itself. The present invention relates to a floor structure which is suppressed to a minimum.

[0002]

2. Description of the Related Art Generally, a floor board to be disposed on the front side of an engine hood of a forklift is formed as a single sheet or a front and rear split type. The left and right ends of the floor board are supported by left and right side frames forming a body frame, and are also detachably fixed to the side frames by bolts and nuts via brackets or the like. A floor mat is usually laid on the floor board.For example, when inspecting or servicing an engine or a transmission, it is possible to remove the floor board by turning up the floor mat and loosening bolts. I can do it.

[0003]

In the conventional floor structure as described above, only the right and left ends of the floorboard are supported by the side frames, so that the rigidity and the rigidity sufficient to support the weight of the operator are provided. In order to ensure the strength, it is necessary to increase the thickness of the floorboard itself to some extent. As a result, the weight is increased and the cost is increased.

Further, since the floorboard is fixed to the left and right side frames only by bolts, vibration from an engine or a transmission supported by the side frames is also directly applied to the floorboard. It is easy to communicate, and there is still room for improvement in ride comfort, especially due to low vibration.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and is intended to suppress vibration transmission from an engine or a transmission as much as possible while improving the rigidity and strength of the floorboard itself. It is intended to provide an improved floor structure.

[0006]

According to the present invention, the left and right ends of a floor board laid on a vehicle body frame are supported by left and right side frames forming the vehicle body frame. The center portion of the floorboard is connected to a pedal mount member that connects the left and right side frames in a cross-linking manner.

The pedal mount bracket referred to here has a function of supporting various foot-operating pedals such as a brake pedal and an accelerator pedal while having a function of a cross member as a strength member.

The floorboards are divided into a front floorboard and a rear floorboard, and are not divided. In the present invention, any type may be used. However, in the case of a two-part type floorboard, for example, the front floorboard is connected to the pedal mount member.

Therefore, according to the first aspect of the present invention, the left and right ends of the floorboard are strengthened members (frame members).
In addition to being connected to and supported by the side frame, the center of the floorboard is also connected and supported by the pedal mount bracket, which is also a strength member. It is more advantageous than the conventional one. In addition, since the vibration from the engine, the transmission, and the like is transmitted from the side frame to the floor board via the pedal mount bracket, the vibration transmitted to the floor board is reduced by an amount corresponding to the passage through the pedal mount bracket.

According to a second aspect of the present invention, a downward embossed portion is formed at the center of the floorboard according to the first aspect of the present invention, and a concave portion for receiving the embossed portion is provided in the pedal mount member. The floorboard is fixed to the pedal mount member by bolts inserted into the embossed portion from above.

Therefore, according to the second aspect of the present invention, since the floorboard can be directly connected to the pedal mount bracket by bolts, the conventional bracket or the like is not required. Since the bolt head is received in the embossed part, the bolt does not protrude above the floor bolt, and the upper surface of the floorboard can be a completely flat surface, so for example, it can be superimposed on the floorboard This is convenient for laying floor mats arranged in such a manner.

Further, the invention described in claim 3 is the first invention.
Or the side frame in the invention according to 2 is divided into a lower side frame and a cab side member which is elastically supported so as to be floatable via an insulator above the lower side frame and forms a skeleton of the cab, The left and right end portions of the floorboard are supported by the left and right cabside members, and the center portion of the floorboard is connected to a pedal mount member that connects the left and right cabside members in a cross-linking manner. .

Therefore, according to the third aspect of the present invention, the cab side member which forms the framework of the cab by the side frame being elastically supported by the lower side frame and the lower side frame via the insulator so as to be able to float. In this case, the structure of the invention described in claim 1 or 2 is substantially applied to the cab side member side, so that the power is transmitted particularly from the lower side frame side to the cab side member side. This vibration is absorbed by the insulator between the two, so that the vibration is less likely to be transmitted to the cab side member side, and eventually to the pedal mount bracket and the floor board side.

[0014]

According to the first aspect of the invention, not only the left and right ends of the floorboard are supported by the side frames, but also the center of the floorboard is cross-linked to the left and right side frames. The rigidity and strength of the floorboard itself are both improved due to the connection to the pedal mount bracket that is Vibration of the engine, transmission, and the like transmitted from the side passes through the pedal mount bracket, which has the effect of achieving lower vibration than in the past.

According to the second aspect of the present invention, after the embossed portion formed downward at the center of the floorboard is received in the concave portion on the pedal mount bracket side, the bolt is inserted from the upper surface side of the embossed portion. Inserted and fixed to the pedal mount bracket, the top of the floorboard can be made almost completely flat without the bolt head protruding above the floorboard. Not only can the feeling be eliminated, but it is also advantageous when laying a floor mat on the floor board.

Further, according to the third aspect of the present invention,
Claim is made when the side frame forming the vehicle body frame is divided into a lower side frame and a cab side member which is elastically supported so as to be able to float above the lower side frame via an insulator so as to form a skeleton of the cab. Since the structure of the invention described in Item 1 or 2 is applied to the cab side member side, the vibration transmitted from the lower side frame side to the cabin side is particularly absorbed by the insulator between the two and the cab side member is provided. Vibration is hardly transmitted to the side and eventually to the pedal mount bracket or the floor board, which is more preferable in terms of reducing vibration.

[0017]

1 to 5 show a preferred embodiment of a floor structure according to the present invention, in which a side frame, which is a vehicle body frame member of a forklift, has a lower side frame 2 and a cabside above it. The cab side member 8 is divided into a member 8 and the cab side member 8 is supported by the lower side frame 2 via an insulator (anti-vibration mount) 6 so as to be floatably and elastically supported.

As shown in FIGS. 1 and 2, a body frame 1, which is a body frame member of a forklift, has a pair of left and right lower side frames 2, 2 each having a box cross-sectional shape, and these lower side frames 2, 2 are connected to each other. A cabin 7 is formed on the vehicle body frame 1 via insulators (vibration-proof mounts) 6 to be mounted on four corner mount brackets 5. It is elastically supported so that it can float.

The cabin 7 has a pair of left and right cab side members 8 and 8 functioning as side frames in the same manner as the lower side frames 2 and 2 described above, and front and rear pillars 9 and 10 as well as those components. The left and right cab side members 8, 8 are composed of a head guard 11 and the like mounted on the pillars 9, 10. It is connected to. Similarly, the left and right rear pillars 10, 10 are connected to each other via a rear cross member 13, and the front pillars 9, 9 are connected to each other via an instrument panel 14.

The cab side member 8 is formed with a concave notch 15a corresponding to the step 15 formed on the side of the lower side frame 2, and the pedal mount bracket 12 is mounted on the mount bracket 5 shown in FIG. Right and left cabside members 8, 8 as close as possible to
They are interconnected. The pedal mount bracket 12 functions as a strength member as in the prior art, and is equipped with an accelerator pedal, a brake pedal, and the like (not shown).

As shown in FIG. 3 in addition to FIGS. 1 and 2, a floor board 16 is laid on a front portion of the cab side member 8, and a floor mat 17 is laid on the floor board 16. It is supposed to be.
The floorboard 16 is divided into a front floorboard 19 and a rear floorboard 20 having a vertical wall portion 20a along a dividing line 18 shown in FIG. 3, and a projection 19a of the front floorboard 19 and a notch 2 of the rear floorboard 20 are provided.
0b (see JP-A-6-211).
158), these front floor boards 19
The left and right ends of the rear floor board 20 are fixed to the left and right cab side members 8 via mount rubbers 21. The front floor board 19
On the back surface of the rear floor board 20, a sound insulating material 22 formed of a non-woven fabric or glass wool into a predetermined shape is used.
Is installed.

More specifically, as shown in FIGS. 4 and 5 in addition to FIG. 3, the floor board 16 is laid so that a part of the front floor board 19 overlaps with the mount rubber 21 on the pedal mount bracket 12. The end of the pedal mount bracket 12 has a recess 23 with a step C between the member pieces 12a and 12b.
On the other hand, a circular embossed portion 24 is formed on the front floor board 19 so as to swell downward. The front floor board 19 is fixed to the pedal mount bracket 12 with a bolt 25 and a screw hole 26a inserted from the upper surface side of the embossed portion 24. Thus, the head of the bolt 25 is completely contained within the depth of the embossed portion 24 and does not protrude from the upper surface of the front floor board 19, and the entire surfaces of the front floor board 19 and the rear floor board 20 are substantially flush and flat. The front floor board 19 and the rear floor board 20
A floor mat 17 is laid so as to be in close contact with the floor mat.
As shown in FIG. 5, a member bracket 26 is fixed to the left and right cab side members 8 in advance by welding, and the pedal mount bracket 12 is received by the member bracket 26 and is detachably fixed by bolts 27. ing.

The rear end of the rear floor board 20 covers the front end of an engine hood (not shown) so that the rear floor board 20 is pressed against the cab side member 8.

Therefore, according to the present embodiment, the cab side member 8 elastically supported on the lower side frame 2 via the plurality of insulators 6 is attached to the floor board 1.
Since the support 6 is supported, the vibration to be transmitted from the lower side frame 2 to the cab side member 8 or the pedal mount bracket 12 is blocked by the insulator 6. This makes it difficult for the vibrations of the drive system such as the engine and the transmission supported by the lower side frame 2 to be transmitted to the floor board 16 and various pedals, and can eliminate the discomfort of the operator by achieving low vibration. Moreover, the left and right ends of the floor board 16 are not only supported by the cab side members 8, but also a part of the center of the front floor board 16 is fixed to the pedal mount bracket 12 with bolts 25. The rigidity and strength of the floorboard 16 itself are higher than those of the related art, and as a result, it is not necessary to increase the thickness of the floorboard 16 more than necessary.

When it is necessary to remove the floor board 16 for inspection or maintenance of the engine and transmission, etc., the floor mat 17 is turned up, and the bolts 25 shown in FIGS. Floor board 19 alone or rear floor board 20
Together with the pedal mount bracket 12 if necessary.

Here, in the above embodiment, the cabin 7
Is shown as an example of a type that is floatably and elastically supported on the body frame 1 via four insulators 6, but the present invention can be similarly applied to floor structures other than the floating cabin type. In this case, since the pedal mount bracket 12 is arranged between the left and right lower side frames 2 and 2 in a bridging manner, the floor board 16 has its left and right ends directly supported by the lower side frame 2. 5, the embossed portion 24 of the front floor board 19 is fixed to the pedal mount bracket 12 by bolting.

[Brief description of the drawings]

FIG. 1 is a view showing a preferred embodiment of the present invention, and is a perspective view of a main part showing a relationship between a vehicle body frame and a cabin elastically supported by the body frame via an insulator so as to be able to float.

FIG. 2 is an exploded perspective view of the cabin.

FIG. 3 is an exploded perspective view showing a mutual relationship between a cab side member constituting the cabin, a floor board, and a floor mat.

FIG. 4 is an enlarged sectional view taken along line AA of FIG. 3;

FIG. 5 is an enlarged sectional view taken along the line BB of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Body frame 2 ... Lower side frame 6 ... Insulator 7 ... Cabin 8 ... Cab side member (side frame) 12 ... Pedal mount bracket 16 ... Floor board 17 ... Floor mat 19 ... Front floor board 20 ... Rear floor board 23 ... Recess 24 ... embossed part 25 ... bolt

Claims (3)

[Claims] 1. Both left and right ends of a floorboard laid on a vehicle body frame are supported by left and right side frames forming the vehicle body frame, and the left and right side frames are connected to each other in a cross-linking manner. A floor structure of an industrial vehicle, wherein a center portion of the floorboard is connected to a pedal mount member. 2. A floor embossed portion is formed at a center portion of the floor board, and a concave portion for receiving the embossed portion is provided in the pedal mount member, and the floor board is bolted into the embossed portion from above. The floor structure of an industrial vehicle according to claim 1, wherein the floor structure is fixed to a pedal mount member. 3. The side frame is divided into a lower side frame and a cab side member which is elastically supported above the lower side frame via an insulator so as to be able to float and form a skeleton of the cab, The left and right end portions of the board are supported by the left and right cab side members, and the center portion of the floor board is connected to a pedal mount member connecting the left and right cab side members in a cross-linking manner. Item 3. The floor structure of an industrial vehicle according to item 1 or 2.