JP2010076846A - Rattling prevention device of carriage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carriage rattling prevention device easy to install, preventing a carriage from rattling and having inexpensive configuration. <P>SOLUTION: This rattling prevention device of a carriage 5 is guided, through guide rollers 24, to the vertical guide groove G of an inner mast member 4 liftably installed on an outer mast member 3 and liftable through a chain 8, and on which a fork member 6 is attached. The upper and lower guide rollers 41, 42 brought into contact with the chain from the front are installed between a chain connection device 26 at the rear lower part of the carriage and the rear upper part of the carriage. A guide member 43 having an arcuate guide surface 43a brought into contact with the chain from the rear side is disposed between the upper and lower guide rollers. The guide member is positioned further forward than the upper and lower guide rollers. A slidable contact member 44 allowed to come into contact with the inner surface of the guide groove of the inner mast member is installed at the rear of the carriage. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rattling prevention device that prevents rattling of a carriage for raising and lowering a fork member provided in a forklift, for example.

  The fork member of the forklift is provided on a carriage guided to be movable up and down by the inner mast member of the mast body composed of an outer mast member and an inner mast member guided by the outer mast member to be movable up and down.

  The carriage is provided with a guide roller guided by a guide groove formed in the inner mast member. Of course, the outer diameter of the guide roller is slightly smaller than the width of the guide groove, for example, about 1 mm. It has been made smaller.

Therefore, rattling occurs when the carriage is raised and lowered, and conventionally, a carriage rattling prevention device has been provided (see, for example, Patent Document 1).
The rattling prevention device includes, for example, a sliding contact body provided via an elastic body on a carriage that can be moved up and down along the inner mast member, and a sliding contact body that is provided on the outer mast member and is in sliding contact with the sliding contact body. It consists of a sliding contact body.
JP 2006-143389 A

  In the above-described conventional rattling prevention device, a cylindrical sliding contact body is provided on the carriage side via a loose coupling means, that is, via an elastic body, and the sliding contact body includes a vertical piece and upper and lower ends thereof. It is composed of warped pieces that are continuously formed in the section and are inclined so as to warp backward, and it is necessary to separately install the constituent members on the outer mast member and the carriage. There are problems that the installation cost is expensive and the installation work is troublesome.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a rattling prevention device that can prevent rattling of a carriage with an inexpensive configuration and easy installation work.

In order to solve the above-described problems, a carriage rattle prevention device according to claim 1 of the present invention includes an outer mast member that is tiltably provided on a vehicle body, and an inner side that is provided on the outer mast member so as to be movable up and down. A mast member, a carriage that is guided through a guide roller in a vertical guide groove formed in the inner mast member and is arranged to be movable up and down on the inner mast member, and to which a fork member for supporting a load is attached, A cord-shaped connecting member provided between the carriage and the outer mast member and having an intermediate portion wound around a guide ring provided on the upper portion of the inner mast member; In a forklift comprising a lifting and lowering cylinder device capable of lifting and lowering a carriage via a connecting member,
Two upper and lower guide members that are in contact with the cord-like connecting member from the front side are provided between the connecting position with the cord-like connecting member in the lower part on the rear side of the carriage and the upper part on the rear side of the carriage. An intermediate guide member having an arcuate guide surface that comes into contact with the cord-like connecting member from the rear side is disposed between the intermediate guide members, and the intermediate guide members are positioned on the front side of the upper and lower guide members,
Further, a sliding contact member capable of contacting the guide groove of the inner mast member is provided on the rear side of the carriage.

According to a second aspect of the present invention, there is provided an apparatus for preventing rattling of a carriage. The outer mast member is provided on the vehicle body so as to be tiltable. The inner mast member is provided on the outer mast member so as to be movable up and down. A carriage which is guided through a guide roller in a vertical guide groove formed in the inner mast member and is arranged to be movable up and down on the inner mast member and to which a fork member for supporting a load is attached, and the carriage and the outer mast A cord-like connecting member that is provided over a member and an intermediate portion is wound around a guide ring provided on the upper portion of the inner mast member; and the inner mast member is lifted and lowered via the cord-like connecting member. In a forklift comprising a lifting and lowering cylinder device capable of moving a carriage up and down,
Two upper and lower guide members that are in contact with the cord-like connecting member from the rear side are provided between the connecting position of the cord-like connecting member in the lower part on the front side of the carriage and the upper part on the front side of the carriage. In addition, an intermediate guide member having an arcuate guide surface that comes into contact with the cord-like connecting member from the front side is disposed, and the intermediate guide member is positioned rearward of the upper and lower guide members,
Further, a sliding contact member capable of contacting the guide groove of the inner mast member is provided on the front side of the carriage.

  According to the above configuration, as in the prior art, the cylindrical sliding contact body is provided via the floating coupling means, and the sliding contact body is continuously formed on the vertical piece and the upper and lower end portions thereof and on the rear side. Unlike what consists of the curvature piece inclined so that it may curve, it simply arrange | positions the intermediate guide member which has an upper and lower guide member and a guide surface for changing a path | route of a cord-like connection member a little in a carriage. Therefore, the configuration is simple and the installation can be easily performed.

Hereinafter, a rattling prevention device for a carriage in a forklift according to an embodiment of the present invention will be described with reference to FIGS.
First, the configuration of the forklift will be briefly described.

  As shown in FIG. 1, this forklift is roughly composed of a vehicle main body 2 in which a traveling wheel 1 is provided at a lower portion and a driver's seat is provided at an upper portion, and a front surface of the vehicle main body 2 in a vertical plane. An outer mast member 3 that is tiltably supported at the inner mast member 4, an inner mast member 4 that is supported by the outer mast member 3 so as to be movable up and down, and a carriage 5 that is a lifting member disposed on the inner mast member 4 so as to be movable up and down. A fork member 6 that is provided on the front side of the carriage 5 and can hold a load, is provided across the carriage 5 and the outer mast member 3, and an intermediate portion is provided above the inner mast member 4. A chain (an example of a cord-like connecting member) 8 that is wound (wound) around a sheave 7 that is a guide ring and holds the carriage 5, and the inner mast fixedly supported by the outer mast member 3. A lifting and lowering cylinder device 9 that moves the material 4 up and down relative to the outer mast member 3, and a tilting cylinder device 10 that is provided across the outer mast member 3 and the vehicle body 2 and tilts the outer mast member 3. It is configured.

  Therefore, when the inner mast member 4 is lifted and lowered by the lifting cylinder device 9, the carriage 5, that is, the fork member 6 is lifted and lowered via the chain 8 by the lifting and lowering of the sheave 7. The lifting cylinder device 9 is disposed on the left and right of the outer mast member 3, and the chain 8 is also disposed on the left and right.

  The carriage rattling prevention device 11 according to the present invention is provided on the carriage 5 side and will be described below. Before describing the rattling prevention device 11, the configuration of the carriage 5 will be described.

  2 and 3, the carriage 5 includes a pair of left and right lift brackets 21 and a pair of upper and lower finger bars 22 provided on the front side so as to connect the lift brackets 21 to each other. A long cross member 23 provided on the upper rear side of each lift bracket 21 so as to connect the brackets 21 to each other, and left and right sides constituting the inner mast member 4 provided above and below the outer surface of each lift bracket 21. The guide roller 24 is configured to move in a guide groove G formed in the mast material 31. As the mast material 31, for example, when H-shaped steel, groove-shaped steel, or the like is used, the groove portion is used as the guide groove G. In the drawing, the gap between the guide roller 24 and the inner surface 31a that forms the guide groove G is shown large. However, in actuality, about 0.5 mm (as described in the background section), Is about 1 mm, and therefore is about 0.5 mm on one side).

A chain connector 26 that fixes one end of the chain 8 via a mounting bracket 25 is provided at the lower rear portion of the lift bracket 21.
Next, the rattling prevention device 11 according to the present invention will be described with reference to FIGS.

  That is, upper and lower guide rollers 41 and 42 are provided as guide members for guiding the chain 8 on the rear side of the lift bracket 21 above the chain couplers 26, and these upper and lower guide rollers 41 and 42 are provided. An intermediate guide member 43 having an arcuate guide surface 43a that can come into contact with the rear surface (rear edge) of the chain 8 is provided between the upper and lower guide rollers 41. , 42 is disposed in front of the front side. To be exact, the guide surface (front contact surface) 43a of the chain 8 of the intermediate guide member 43 is more forward than the guide surfaces (rear contact surfaces) 41a, 42a of the upper and lower guide rollers 41, 42 with the chain 8. It is supposed to be located. Then, at both ends of the cross member 24, more precisely, at positions corresponding to the guide grooves G of the cross member 24, a slide that can be in sliding contact with an inner surface 31a (here, the rear surface) that forms the guide groove G. Each contact member 44 is attached. The sliding contact member 44 is composed of a main body portion 44a and a flat mounting portion 44b provided on one end side of the main body portion 44a, and the main body portion 44a has a hole portion 24a formed in the cross member 24. The attachment portion 44b is attached to the cross member 24 side via the attachment screw 45 so as to be inserted. The sliding contact member 44 is made of synthetic resin. The amount of protrusion of the main body 44a from the cross member 24 can be adjusted by inserting a shim plate (not shown) or the like between the mounting portion 44b and the cross member 24. For example, when the main body 44a is worn out by inserting a shim plate first, if the shim plate is removed, the main body 44a protrudes from the cross member 24 and is used again as a sliding contact member. Can do.

  Therefore, in the above configuration, when the inner mast member 4 is moved up and down via the lifting cylinder device 9, the sheave 7 around which the intermediate portion of the chain 8 is wound moves up and down, so that the tip of the chain 8 is lifted and lowered. . That is, the carriage 5 is moved up and down.

  At this time, the carriage 5 passes through the upper and lower guide rollers 41 and 42 and the guide member 43 provided on the rear side thereof, and the arrow 5 in FIG. As shown, the carriage 5 is urged rearward, and the sliding contact members 44 provided at both ends of the cross member 24 are in sliding contact with the inner surface of the guide groove G of the inner mast member 4. That is, when the carriage 5 is raised and lowered, the carriage 5 is always urged rearward and the sliding contact member 44 is in sliding contact with the inner surface 31a of the mast material 31, thereby preventing the carriage 5 from rattling. be able to.

In addition, it is as follows when the rattling prevention apparatus mentioned above is demonstrated collectively.
That is, the rattling prevention device includes an outer mast member that is tiltably provided on the vehicle body, an inner mast member that is movable up and down on the outer mast member, and a vertical direction formed on the inner mast member. A carriage that is guided by a guide roller in the guide groove of the inner mast member and can be moved up and down on the inner mast member, and a fork member for supporting a load is attached to the carriage, and the carriage is provided between the carriage and the outer mast member. A forklift comprising a chain wound around a guide wheel provided at an upper portion of the inner mast member, and a lifting cylinder device capable of lifting the carriage through the chain by moving the inner mast member up and down ,
Two upper and lower guide rollers that contact the chain from the front side are provided between the connection position with the chain at the lower rear side of the carriage and the upper rear side of the carriage, and the chain is placed between the upper and lower guide rollers. An intermediate guide member having an arcuate guide surface that contacts from the rear side is arranged, and the intermediate guide member is positioned on the front side of the upper and lower guide rollers (more precisely, it contacts the chain in the intermediate guide member) The guide surface to be moved is positioned in front of the guide surface contacting the chain in the upper and lower guide rollers),
Further, a sliding contact member capable of contacting the guide groove of the inner mast member is provided on the rear side of the carriage.

  According to the configuration of the rattling prevention device described above, the cylindrical sliding contact body is provided via the floating coupling means as in the prior art, and the sliding contact body is connected to the vertical piece and the upper and lower end portions thereof. Unlike the one formed by the warped pieces that are formed and inclined backwardly, the carriage simply has a middle with upper and lower guide rollers and an arcuate guide surface to slightly change the path of the chain Therefore, it is only necessary to arrange the guide member, so that the configuration is simple and the installation can be easily performed.

  In the above embodiment, the chain coupler 26, the upper and lower guide rollers 41 and 42, and the intermediate guide member 43 are arranged on the rear side of the carriage 5. For example, as shown in FIG. The carriage 5 may be urged forward to prevent the carriage 5 from rattling. Of course, the sliding contact member 44 is also provided on the front side of the carriage 5.

The rattling prevention apparatus having such a configuration will be described as follows.
That is, the rattling prevention device includes an outer mast member that is tiltably provided on the vehicle body, an inner mast member that is movable up and down on the outer mast member, and a vertical direction formed on the inner mast member. A carriage that is guided by a guide roller in the guide groove of the inner mast member and can be moved up and down on the inner mast member, and a fork member for supporting a load is attached to the carriage, and the carriage is provided between the carriage and the outer mast member. A forklift comprising a chain wound around a guide wheel provided at an upper portion of the inner mast member, and a lifting cylinder device capable of lifting the carriage through the chain by moving the inner mast member up and down ,
Two upper and lower guide rollers that come into contact with the chain from the front side are provided between the connection position with the chain in the lower part on the front side of the carriage and the upper part on the front side of the carriage. An intermediate guide member having an arcuate guide surface that is in contact is disposed, and the intermediate guide member is positioned behind the upper and lower guide rollers (more precisely, the guide that contacts the chain in the intermediate guide member) The surface is positioned behind the guide surface that contacts the chain in the upper and lower guide rollers),
Furthermore, a sliding contact member that can contact the guide groove of the inner mast member is provided on the front side of the carriage.

It is a side view which shows schematic structure of the forklift which comprised the rattling prevention apparatus which concerns on embodiment of this invention. It is principal part sectional drawing which shows schematic structure of the same rattling prevention apparatus. It is AA sectional drawing of FIG. It is a BB arrow line view of FIG. It is CC sectional drawing of FIG. It is principal part sectional drawing which shows schematic structure of the rattle prevention apparatus which concerns on other embodiment of this invention.

Explanation of symbols

G Guide groove 2 Vehicle body 3 Outer mast member 4 Inner mast member 5 Carriage 6 Fork member 7 Sheave 8 Chain 9 Lifting cylinder device 11 Anti-rattle device 21 Lift bracket 23 Guide roller 24 Cross member 26 Chain connector 41 Upper guide Roller 41a Guide surface 42 Lower guide roller 42a Guide surface 43 Guide member 43a Guide surface 44 Sliding member

Claims (2)

An outer mast member that is tiltably provided on the vehicle body, an inner mast member that is provided to be movable up and down on the outer mast member, and a guide groove in a vertical direction formed on the inner mast member through a guide roller. The carriage is disposed so as to be movable up and down on the inner mast member, and the fork member for supporting the load is attached to the carriage. The carriage is provided across the carriage and the outer mast member, and the intermediate portion is provided above the inner mast member. In a forklift comprising a cord-like connecting member wound around a guide wheel, and a lifting / lowering cylinder device capable of raising and lowering the inner mast member and raising and lowering a carriage via the cord-like connecting member,
Two upper and lower guide members that are in contact with the cord-like connecting member from the front side are provided between the connecting position with the cord-like connecting member in the lower part on the rear side of the carriage and the upper part on the rear side of the carriage. An intermediate guide member having an arcuate guide surface that comes into contact with the cord-like connecting member from the rear side is disposed between the intermediate guide members, and the intermediate guide members are positioned on the front side of the upper and lower guide members,
Further, a rattling prevention device for a carriage, characterized in that a sliding contact member capable of contacting the guide groove of the inner mast member is provided on the rear side of the carriage. An outer mast member that is tiltably provided on the vehicle body, an inner mast member that is provided to be movable up and down on the outer mast member, and a guide groove in a vertical direction formed on the inner mast member through a guide roller. The carriage is disposed so as to be movable up and down on the inner mast member, and the fork member for supporting the load is attached to the carriage. The carriage is provided across the carriage and the outer mast member, and the intermediate portion is provided above the inner mast member. In a forklift comprising a cord-like connecting member wound around a guide wheel, and a lifting / lowering cylinder device capable of raising and lowering the inner mast member and raising and lowering a carriage via the cord-like connecting member,
Two upper and lower guide members that are in contact with the cord-like connecting member from the rear side are provided between the connecting position of the cord-like connecting member in the lower part on the front side of the carriage and the upper part on the front side of the carriage. In addition, an intermediate guide member having an arcuate guide surface that comes into contact with the cord-like connecting member from the front side is disposed, and the intermediate guide member is positioned rearward of the upper and lower guide members,
Furthermore, a rattling prevention device for a carriage, wherein a sliding contact member capable of contacting the guide groove of the inner mast member is provided on the front side of the carriage.

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