JP2004196500A - Floor cushion of reach fork lift - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor cushion of a reach fork lift that has a simple configuration and can maintain vibration absorption effect for a long time. <P>SOLUTION: In the floor cushion 10 of the reach fork lift, a prism 13 is provided at a position that opposes a hole section 11a being provided at four corners of a floorboard 11 on the lower surface of a member 12 made of rubber as in the floorboard 11 in a plan view. Then, the member 12 made of rubber is fixed to the floorboard 11 by the fitting between the hole section 11a and the prism 13. Additionally, a plurality of rows of protrusions 14 are formed on the lower surface of the member 12 made of rubber, and a recess 15 surrounded by the protrusions 14 and the outer periphery section of the member 12 made of rubber forms an air chamber at an area to the upper surface of the floorboard 11. Further, a projection 16 projecting in the direction of the floorboard 11 is formed at the recess 15. A non-slip pattern 17 is formed on the upper surface of the member 12 made of rubber as a support surface for supporting an operator, thus absorbing vibration by the elastic deformation of a tip section 13a of the prism 13, the air chamber, the protrusions 14, and the projection 16. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a floor cushion of a reach forklift that is provided in a reach forklift that is operated while the operator is standing and that is laid at a position where the operator stands during operation.
[0002]
[Prior art]
As shown in FIG. 2, the reach forklift has a pair of left and right outriggers 8 each having wheels W fixed to a lower front portion of the vehicle body, and a mast 6 movably in the front-rear direction. A fork support 7 having a pair of left and right forks 7a is provided on the mast 6 so as to be movable up and down.
[0003]
The driver's cab is provided on the rear right side of the vehicle body, and has a rectangular space in plan view surrounded by a left box frame 2 covering the drive device and the steering device, a front front frame 3 and a right side frame 4. Have been. The rear side is opened as an entrance 5 for an operator to get on and off. Also, a pair of wheels W (drive wheels) is provided below the box frame 2 and the cab. Further, at a position where the operator stands when driving, a rectangular floor cushion 1 is provided to absorb vibration applied from the wheels W and prevent the vibration from being transmitted to the operator.
[0004]
The floor cushion 1 is required to have excellent vibration isolation. Therefore, for example, a floor cushion 1 as shown in a sectional view in FIG. 3 has been proposed. As shown in FIG. 3, a floor cushion 1 is provided on a body frame F of a reach forklift, a floor plate 1b made of an iron plate or the like, a sponge 1c, a rubber plate, and a rubber groove. It is constituted by sequentially laminating and attaching the attached rubbers 1d. In the floor cushion 1 configured as described above, the vibration can be absorbed by the vibration isolator 1a and the sponge 1c while the flatness of the grooved rubber 1d is ensured by the floor plate 1b. In addition, a non-slip groove (non-slip pattern) is formed on the surface of the grooved rubber 1d to prevent the operator's foot from slipping during operation.
[0005]
The applicant of the present application knows that the floor cushion 1 as described above is disclosed in a catalog of "Toyota Forklift R500" (manufactured by Toyota Motor Corporation) as a publication distributed in Japan. However, as a document in which the date of issue is specified, there is no prior art document information that discloses the above-mentioned prior art.
[0006]
[Problems to be solved by the invention]
However, the floor cushion 1 has a four-layer structure including the vibration-proof material 1a, the floor plate 1b, the sponge 1c, and the grooved rubber 1d, so that the number of components increases and the manufacturing cost increases. In addition, getting on and off of the reach forklift is frequently performed. For this reason, a so-called sag occurs in the sponge 1c which greatly affects the riding comfort, and it has been difficult to maintain the vibration absorbing effect of the floor cushion 1 for a long time.
[0007]
Therefore, an object of the present invention is to provide a floor cushion of a reach forklift, which has a simple structure and can maintain a vibration absorbing effect for a long time.
[0008]
Means for Solving the Problems and Effects of the Invention
The invention according to claim 1, which has been made to achieve the above object, is a floor cushion of a reach forklift, which is provided in a reach forklift that is operated while the operator is standing, and is laid at a position where the operator stands when operated.
A floor plate supported on the body frame of the reach forklift via an elastic member, and a concave portion laminated on the floor plate and forming a closed air chamber between the lower surface and the upper surface of the floor plate, Is characterized in that a support surface for supporting the operator includes a rubber member formed respectively.
[0009]
In the present invention thus configured, by laminating the rubber member on the floor plate, an air chamber sealed by the concave portion of the rubber member and the upper surface of the floor plate is formed, and the air chamber absorbs vibration. . The upper surface of the rubber member is a support surface for supporting the operator. Therefore, in the present invention, only by laminating the rubber member on the floor plate, the air chamber absorbing the vibration and the support surface for supporting the operator are formed at the same time. Therefore, the floor cushion of the reach forklift according to the present invention has a simple structure and the manufacturing cost can be favorably reduced. In addition, since the air chamber is sealed by a rubber member, it is difficult for the air chamber to set like a sponge and the vibration absorbing effect can be maintained for a long time.
[0010]
According to a second aspect of the present invention, in addition to the configuration of the first aspect, the rubber member is integrally formed with a convex portion protruding toward the floor plate in the concave portion, and a large load is applied from the support surface. It is characterized in that the area of contact between the convex portion and the upper surface of the floorboard increases as it becomes more and more.
[0011]
In the present invention, the contact area between the convex portion formed integrally with the concave portion of the rubber member and the upper surface of the floor plate increases as the load from the support surface increases. When the contact area increases, the rate of increase of the elastic force applied to the support surface in accordance with the deformation of the projection also increases. Therefore, the spring constant of the floor cushion can be increased as the vibration increases. For example, it is also possible to design such that when the acceleration of the reach forklift is small, little elastic force is generated due to the deformation of the convex portion, and when the acceleration of the reach forklift is large, the elastic force is large due to the deformation of the convex portion. Therefore, according to the present invention, in addition to the effect of the first aspect of the invention, there is an effect that a good vibration absorbing effect can be exhibited in a wide vibration band.
[0012]
According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, a ridge that divides the air chamber into a plurality is formed in the recess, and the ridge and the floor plate are in contact with each other. The air chamber is characterized by a plurality of independent air chambers.
In the present invention, since the ridge integrally formed in the concave portion of the rubber member comes into contact with the floor plate, an elastic force can be generated by the deformation of the ridge to absorb the vibration. Moreover, the air chamber becomes a plurality of independent air chambers when the ridge comes into contact with the floor plate. For this reason, the vibration absorbing effect by the elastic force generated by the air chamber is further stabilized, and is exerted uniformly over the entire supporting surface. Therefore, in the present invention, in addition to the effects of the first and second aspects of the present invention, there is an effect that a more favorable and stable vibration absorbing effect can be uniformly generated over the entire support surface.
[0013]
According to a fourth aspect of the present invention, in addition to the configuration according to any one of the first to third aspects, a plurality of holes are provided in the floor plate, and a portion of the rubber member facing each of the holes is provided with: A plurality of pillars that support the rubber member and the floor plate on the body frame are integrally formed by penetrating the hole and abutting on the body frame, and further, each of the pillars is elastically deformed. Thus, the floor panel is supported at a certain distance from the vehicle body frame by passing through the holes and returning to the original shape after passing through the holes.
[0014]
The rubber member of the present invention is used in such a manner that a plurality of pillars integrally formed with the rubber member are respectively elastically deformed and penetrated through a plurality of holes provided in the floor plate. Then, after passing through the hole, the column returns to its original shape, and the column is brought into contact with the vehicle body frame, so that the column supports the floor plate with a space from the vehicle body frame. That is, in the present invention, the elastic member according to claim 1 is constituted by the pillar penetrating the hole. For this reason, in the present invention, in addition to the effect of the invention according to any one of claims 1 to 3, the above-mentioned vibration can be more favorably absorbed by the elasticity of the column, and the configuration is further simplified. There is an effect that the manufacturing cost can be more favorably reduced. Further, since the positional relationship between the rubber member and the floor plate is defined by the pillar penetrating the hole, the positional relationship between the rubber member and the floor plate can be stably maintained, and the vibration absorbing effect can be further stably maintained. .
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1A is a cross-sectional view illustrating a configuration of a floor cushion 10 of a reach forklift to which the present invention is applied, and FIG. 1B is a bottom view illustrating a configuration of a rubber member 12 of the floor cushion 10. . FIG. 1A is a cross-sectional view taken along the line AA in FIG. 1B. In FIG. 1B, the lower part of the figure corresponds to the traveling direction of the reach forklift.
[0016]
As shown in FIG. 1 (A), rectangular holes 11a are provided at four corners of a rectangular floor plate 11, respectively, and the holes 11a are formed on the lower surface of a rubber member 12 similar to the floor plate 11 in plan view. Are provided at respective opposite positions. The pillar 13 has a distal end 13a formed in a substantially cylindrical shape having a larger diameter than the hole 11a, and a base end 13b formed in a cylindrical shape having the same diameter and the same thickness as the hole 11a. The distal end of the distal end portion 13a is chamfered in a curved shape, and the distal end portion 13a is elastically deformed so that the column body 13 penetrates the hole portion 11a so that the hole portion 11a is fitted to the base end portion 13b. I do.
[0017]
By this fitting, the rubber member 12 is fixed to the floor plate 11 to form the floor cushion 10. The floor cushion 10 is used by being laid so that the tip of the tip portion 13a contacts the body frame F of the reach forklift. Although not shown, the vehicle body of the reach forklift is also provided with a side wall for preventing the floor cushion 10 from moving in the horizontal direction.
[0018]
On the other hand, on the lower surface of the rubber member 12 facing the floor plate 11 at the time of fixing to the floor plate 11 as described above, a plurality of rows of ridges 14 are formed along the traveling direction of the reach forklift. The concave portion 15 surrounded by the outer peripheral portion of the member 12 forms a closed air chamber between the concave portion 15 and the upper surface of the floor plate 11. Further, in the recess 15, a plurality of substantially conical protrusions 16 protruding in the direction of the floor plate 11 are formed at appropriate intervals. The upper surface of the rubber member 12 has a non-slip pattern 17 formed thereon and serves as a support surface for supporting an operator. Note that the rubber member 12 is made of a rubber material such as natural rubber, SBR (styrene / butadiene rubber), EPDM (ethylene / propylene rubber) together with the pillars 13, the ridges 14, and the protrusions 16 (conventional grooved rubber 1d). (Similar material).
[0019]
In the floor cushion 10 of the present embodiment configured as described above, the floor plate 11 is supported at an interval from the vehicle body frame F via the distal end portion 13a of the column 13 as an elastic member. Further, the tip portion 13a, the air chamber formed between the concave portion 15 and the floor plate 11, and the ridge 14 absorb the vibration applied from the wheel W (see FIG. 2) to prevent the vibration from being transmitted to the operator. .
[0020]
Further, when no load is applied to the support surface, the convex portion 16 is separated from the floor plate 11 as shown in the figure. However, when a large load is applied to the support surface, the convex portion 16 comes into contact with the floor plate 11 and the floor plate 11 increases as the load increases. The contact area with the contact 11 increases. Therefore, when the vibration applied from the wheel W is small, such as when the acceleration of the reach forklift is extremely small, the vibration is absorbed only by the elastic deformation of the tip portion 13a, the air chamber, and the ridge 14. When the vibration increases, the elastic deformation of the convex portion 16 also contributes to the vibration absorption. Even when the reach of the reach forklift is large, the contact area between the convex portion 16 and the floor plate 11 gradually increases, so that the vibration is favorably increased. Can be absorbed.
[0021]
Further, the floor cushion 10 of the present embodiment is composed of two members, a rubber member 12 and a floor plate 11, and is bonded by the work of merely fitting the column 13 into the hole 11a as described above. It can be made very easily without using any agents. Therefore, in the present embodiment, the configuration can be simplified and the manufacturing cost can be favorably reduced. Further, the positional relationship between the rubber member 12 and the floor plate 11 is stably maintained by the fitting of the pillars 13 and only the rubber member 12 can be easily removed at the time of disposal, so that recycling is easy.
[0022]
Further, since each of the above-mentioned portions exhibiting the vibration absorbing effect does not cause sag unlike a sponge, the vibration absorbing effect can be maintained for a long time. Moreover, in the present embodiment, as described above, an extremely excellent vibration absorbing effect can be obtained, so that the suspension between the wheel W of the reach forklift and the vehicle body is omitted, and a rubber molded product without air is used as the wheel W. Even when used, good ride comfort can be ensured.
[0023]
It should be noted that the present invention is not limited to the above embodiment at all, and can be implemented in various forms without departing from the gist of the present invention. For example, as the shape of the convex portion 16, various shapes such as a substantially pyramid shape and a substantially hemispherical shape can be applied other than the substantially conical shape, and the convex portion 16 is not necessarily provided. Further, the column 13 may not be necessarily provided, and a configuration in which the rubber member 12 from which the column 13 is omitted is attached to the floor plate 1b shown in FIG.
[0024]
Further, the protrusions 14 may be provided in the left-right direction of the reach forklift, may be provided crossing in a cross shape, and may not necessarily be provided. However, when the ridges 14 are provided and each air chamber is an independent air chamber as in the above-described embodiment, not only the vibration absorbing effect can be obtained by the elastic deformation of the ridge 14 itself, but also the The vibration absorbing effect can be generated stably and uniformly over the entire support surface.
[0025]
Furthermore, it is not always necessary to provide a non-slip pattern on the support surface, as long as the support surface has a frictional resistance that can prevent the foot of the operator from slipping.
[Brief description of the drawings]
FIG. 1A is a cross-sectional view illustrating a configuration of a floor cushion of a reach forklift to which the present invention is applied, and FIG. 1B is a bottom view illustrating a configuration of a rubber member of the floor cushion.
FIG. 2 is a rear perspective view illustrating an overall configuration of a reach forklift.
FIG. 3 is a cross-sectional view illustrating a configuration of a floor cushion of a conventional reach forklift.
[Explanation of symbols]
1, 10: Floor cushion 11: Floor plate 11a: Hole 12: Rubber member 13: Column 14: Protrusion 15: Depression 16: Convex 17: Non-slip pattern F: Body frame

Claims (4)

A floor cushion of a reach forklift that is provided on a reach forklift that is operated while the operator is standing, and that is laid at a position where the operator stands when driving,
A floor plate supported on the body frame of the reach forklift via an elastic member,
A rubber member laminated on the floor plate, a lower surface having a concave portion forming an air chamber sealed with the upper surface of the floor plate, and a support surface supporting the operator on the upper surface, respectively, a rubber member,
A floor cushion for a reach forklift, comprising: In the rubber member, a convex portion protruding toward the floor plate is integrally formed in the concave portion, and as the load applied from the support surface increases, the contact area between the convex portion and the upper surface of the floor plate increases. The floor cushion for a reach forklift according to claim 1, wherein the floor cushion is provided. The ridge that divides the air chamber into a plurality of portions is formed in the concave portion, and the ridge and the floor plate are in contact with each other so that the air chamber becomes a plurality of independent air chambers. Or the floor cushion of the reach forklift according to 2. A plurality of holes are provided in the floorboard,
A plurality of pillars that support the rubber member and the floor plate on the vehicle body frame by penetrating the hole portion and abutting on the vehicle body frame at a portion of the rubber member facing the hole portions. Are integrally molded,
Further, each of the pillars passes through each of the holes by elastically deforming, and returns to its original shape after passing through each of the holes, thereby supporting the floor plate at an interval from the vehicle body frame. The floor cushion of a reach forklift according to any one of claims 1 to 3, characterized in that:

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