JP2554330Y2 - Linear movement guide device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to linearly guiding a moving member along a guide rail provided on a fixed member side, and is used, for example, as a leader of a foundation construction machine such as a pile driver or an excavator. The present invention relates to a linear movement guide device used as a guide for linearly moving a work implement.

[0002]

2. Description of the Related Art As shown in FIG. 1, an excavating machine of this kind, for example, an excavating machine, includes an extendable slide frame 2 and a leader 3 mounted on a traveling vehicle 1 and an up-and-down cylinder 4.
The guide rail 5 attached to the leader 3 side and the guide roller 8 attached to the movable work tool 7 rotatably supporting the auger 6 allow the movable work tool 7 to be vertically supported. Guide rail 5
It can move up and down along. This guide rail 5
And the guide roller 8 constitute a linear movement guide device, and the movable work implement 7 that can move up and down via the linear movement guide device is, for example, a wire rope 10 wound around a winch 9 mounted on the traveling vehicle 1. Or moving up and down by known linear reciprocating means.

As a conventional linear movement guide device of this type, for example, a work guidance device disclosed in Japanese Utility Model Publication No. 2-2752 is known. As shown schematically in FIG. 2, in these conventional linear movement guide devices, a pair of two guide rods 13 and 14 having a circular cross section project in parallel from a leader side 11 which is a fixed member via a support member 12. A pair of left and right guide rollers 16 and 1 formed by grooved rollers whose outer peripheral surface is confined in an arc shape on the side of the moving work tool 15 which is a moving member.
7 is rotatably mounted on the guide roller 1.
The grooves 6 and 17 are engaged so as to hold the guide rods 13 and 14.

[0004]

In the above-described linear movement guide device, foreign matter (especially earth and sand, etc. for a foundation construction machine such as an excavator) adheres to the guide rods 13, 14 and the guide rollers 16, 17 during use. In many cases, the slidable contact portion gradually loses due to wear due to the attached foreign matter,
Eventually, normal lifting operation cannot be performed. Therefore, the guide rods 13 and 14 and the guide rollers 16 and 17 need to be repaired by replacing them with new ones. However, the guide rods 13 and 14 are integrally fixed to the leader side 11 via the support member 12 by welding. Therefore, if the welded part is cut and the replacement part is re-welded, distortion occurs and the part is not restored normally. Therefore, the entire part including the leader side 11 needs to be replaced, requiring a great deal of time and money. Met. Further, even if only the guide rollers 16 and 17 are replaced with new ones, the wear on the guide rods 13 and 14 cannot be compensated for, so that the normal operation life cycle is extremely short. Therefore, an object of the present invention is to provide a linear movement guide device for solving such a problem of the related art.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, in a linear movement guide device according to the present invention, a guide roller pivotally attached to a moving member side and having a groove-shaped sliding contact surface formed on an outer periphery of a rotating portion. And a guide rail attached to the fixed member side and having a convex rolling surface adapted to the grooved sliding contact surface of the guide roller is engaged, and extends along the moving direction of the moving member. In the linear movement guide device in which the moving member is guided while the guide roller slides and rotates on the convex rolling surface of the guide rail, the guide roller is connected to the roller shaft in a fixed state via fastening means. First and second divided rollers, a plurality of gap adjusting members which are removably fitted to the roller shafts and are interposed between joining portions of the divided rollers, and the inner ring side is the roller shaft. A roller bearing connected in a fixed state, the outer ring side of which is fixed to the moving member side, and the grooved slide adapted to the convex rolling surface of the guide rail when combined with the outer periphery of each of the divided rollers. 1st face
And the second divided sliding contact surfaces are formed respectively, and the loss due to wear of the sliding contact portion due to the attachment and detachment of the gap adjusting member is corrected.

In another linear movement guide device according to the present invention, the first divided roller has a first divided portion corresponding to approximately one half of the convex rolling surface of the guide rail on the outer periphery on the base side. It is formed of a shaft-shaped roller that forms a sliding contact surface and has a shaft serving as the roller shaft protruding from the base side. The shaft portion of the shaft-shaped roller is provided with the guide on the outer periphery via the gap adjusting member. A ring-shaped second split roller having a second split sliding contact surface corresponding to approximately one half of the convex rolling surface of the rail is mounted, and the first and second split sliding contact surfaces are mounted. An arcuate or dogleg-shaped groove-shaped sliding contact surface that fits the convex rolling surface of the guide rail was formed by synthesis.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a linear movement guide device according to the present invention will be described in detail with reference to an excavator elevating movement guide device described with reference to FIG. FIG. 3 shows a linear movement guide device according to the first embodiment. As shown in FIG.
A pair of left and right guide rails 2 via a support member 22
3, 24 are attached. The support member 22 includes a support arm 25 protruding from the leader 21 and a connection plate 26 attached to the tip of the support arm 25 and connecting the guide rails 23 and 24 described above. Further, the guide rails 23 and 24 are each formed by a round pipe or a round bar having a circular cross-sectional shape in order to form a convex rolling surface having an outer periphery in an arc shape.
The guide rails 23 and 24 and the connecting plate 26 are welded 27
Has been fixed by.

[0008] A pair of left and right guide rollers A, A are engaged outside the guide rails 23, 24 so as to hold the guide rails 23, 24. The guide roller A constitutes a shaft-shaped roller 28 constituting a first divided roller, a gap adjusting member 29, a ring-shaped roller 30 constituting a second divided roller, a rolling bearing 31, and a fastening means. Washers 32
And a nut 33. The shaft-shaped roller 28 has a first divided sliding contact surface 34 having an arc shape that is adapted to approximately one half of the convex rolling surface formed by the outer semicircular portions of the guide rails 23 and 24 at the base end side. A shaft 35 which is formed on the outer periphery and serves as a roller shaft protrudes from the base end side, and a screw portion 36 is provided on the distal end side of the shaft 35. The ring-shaped roller 30 has an arc-shaped second divided sliding contact surface 37 which is adapted to substantially half of the convex rolling surface formed by the outer semicircular portions of the guide rails 23 and 24.
Is formed on the outer periphery, and the ring-shaped roller 30 is fitted on the outer periphery of the shaft of the roller shaft, that is, the shaft-shaped roller 28. A first divided sliding contact surface 34 formed on the outer periphery of the base roller of the shaft-shaped roller 28 as the first divided roller, and a second divided roller formed on the outer periphery of the ring-shaped roller 30 as the second divided roller The sliding surface 37 cooperates with the sliding surface 37 to form an arcuate groove-shaped sliding surface that conforms to the convex rolling surfaces of the guide rails 23 and 24.

[0009] The rolling bearing 31 is a shaft-shaped roller 2.
8 is fitted on the outer periphery of the shaft 35, and the outer ring 38 thereof is fixed to a moving work tool 39 which is a fixing member. A screw portion 36 formed at the tip of the shaft 35 includes:
A nut 33 is screwed through a washer 32, and the ring-shaped roller 30 is attached to the base end side of the shaft-shaped roller 28 via the inner ring side of the rolling bearing 31 by tightening the nut 33. Between the joint end portions of the shaft-shaped roller 28 and the ring-shaped roller 30 described above, a state in which the shaft-shaped roller 28 and the ring-shaped roller 30 are fitted around the shaft 35 is used.
A plurality of gap adjusting members 29 as shown by are inserted in advance. The gap adjusting member 29 is formed of an annular thin metal plate, and is provided with a cut 29a at one location so that the gap adjusting member 29 can be removed at appropriate times while being fitted on the outer periphery of the shaft 35 when adjusting the interval. I have.

In the linear movement guide device having the above-described structure, the gap adjustment is provided on the outer periphery of the shaft 35 between the joining ends of the shaft-shaped roller 28 and the ring-shaped roller 30.
The nut 33 is tightened in a state in which, for example, about six pieces having a thickness of about 0.5 mm are inserted in advance as the member 29, and in this state, an arc-shaped groove-shaped sliding contact formed by combining the divided sliding contact surfaces 34 and 37. The dimensions of each part are set in advance so that the surfaces match the convex rolling surfaces formed by the outer circumferences of the guide rails 23 and 24. As a result, as in the case of FIG. 1, the moving work tool 3 is fed or wound by a wire rope wound around a winch or by other known linear reciprocating means.
9 is moved up and down, the shaft-shaped roller 28 and the ring-shaped roller 30 are integrated to form the guide rail 23,
While being rolled along 24, the mobile work tool 39 is guided in a linear movement.

During use, foreign matter such as earth and sand adheres to the sliding contact surfaces 34 and 37 of the shaft-shaped roller 28 and the ring-shaped roller 30 which are the sliding contact portions, and the guide rail 2.
If the convex rolling surfaces 3 and 24 are lost due to abrasion and rattling occurs, the nut 33 is temporarily loosened, the gap adjusting member 29 is pulled out according to the abrasion of the sliding contact portion, and the nut is re-engaged. The interval is adjusted by tightening 33. As a result, an arc-shaped surface having a slightly smaller diameter than the initial state is obtained, so that the loss due to abrasion is corrected, and the device can be continuously used in a normal operation without rattling. As described above, when the gap adjusting members 29 are sequentially removed one by one in accordance with the wear of the sliding contact portion, and the gap is adjusted, when all of the members are removed, a maximum of 3 mm of wear is allowed, and there is no difference from the initial state. It can be used continuously for a long time.

Next, FIG. 5 shows a linear movement guide device according to a second embodiment of the present invention, in which the first split roller and the roller shaft which are integrally formed in the first embodiment are integrated. Are formed separately in this embodiment. In the guide roller B according to this embodiment, as the first split roller and the second split roller, convex rolls formed by the outer semicircular portions of the guide rails 23 and 24 are formed similarly to the ring-shaped roller 30 in the previous embodiment. Ring-shaped rollers 42, 43 each having an arc-shaped divided sliding contact surface 40, 41 formed on the outer periphery thereof, which are adapted to approximately one half of the moving surface, are used.
By combining the divided sliding contact surfaces 40 and 41, an arcuate groove-shaped sliding contact surface which is adapted to the convex rolling surface of the guide rail is formed. The gap adjustment member 44 of the previous embodiment as well as the predetermined number of sheets between the ring-shaped rollers 42, 43 is interposed, these ring-shaped roller 42, 43 and gap adjustment
A roller shaft 48 having a shaft provided with a flange portion 46 at the base and a screw portion 46 at the tip is inserted through the shaft center of the member 44 and the rolling bearing 45.
When a nut 50 is screwed into the roller 6 through a washer 49 as a fastening means, the members inserted into the roller shaft 48 are integrally connected while being clamped between the fastening means and the flange 46.

FIG. 6 shows a third embodiment of a linear movement guide device according to the present invention. In this embodiment, long rectangular members are used for the guide rails 51 and 52, and the guide rails are used. The guide roller C is slidably guided along a convex rolling surface having a U-shaped cross section formed by two sides.
In the guide roller C according to this embodiment, a first divided roller 54 is formed by a trapezoidal base having a tapered divided sliding contact surface 53 on the outer periphery, and a roller shaft 55 is integrally formed with the divided roller 54. Is formed. The roller shaft 55 has a trapezoidal ring-shaped second split roller 5 having a split sliding contact surface 56 tapered on the outer periphery.
7 is inserted between the second split roller 57 and the first split roller 54, similarly to the previous embodiment.
A predetermined number of removable gap adjusting members 58 are interposed in the frame 5. Although not shown, rolling bearings having the outer ring side fixed to the moving member side are attached to the roller shaft 55 in the same manner as the previous embodiment, and these members are provided on the tip end side of the roller shaft 55. And are integrally connected by a fastening member attached to the screw portion.

This linear movement guide device can be applied not only to a device that moves up and down, but also to a device that moves horizontally, and can be applied not only to a machine for foundation work but also to a cargo handling device such as a forklift for loading and unloading luggage. In addition to the above, the present invention can be applied to other uses and various other configurations can be adopted within the scope of the gist.

[0015]

As is apparent from the above embodiments, in the linear movement guide device according to the present invention, the divided sliding surfaces of the divided rollers inserted into the roller shaft cooperate to form the convex rolling surface of the guide rail. For example, a groove-shaped sliding contact surface in the shape of an arc or a letter is formed, and between the groove-shaped sliding contact surfaces of the divided rollers, a plurality of gap adjustment members which are detachably attached according to wear of the sliding contact portion. A member is inserted. When the gap adjusting member is loose due to wear and the sliding contact portion is loose, if it is sequentially extracted according to the loss, the diameter becomes slightly smaller than the initial time when the loss due to wear is corrected, but a similar groove shape Since it is a sliding contact surface, it can be used continuously with normal operation without rattling. Accordingly, when the sliding contact portion is lost, the guide rollers and guide rails are replaced, and in some cases, the guide members and the fixing members to which the guide rails are attached are also replaced. Time and expense are significantly reduced and the life cycle of normal operation without replacement can be extended.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an excavator which is one of implementation targets of a linear movement guide device of the present invention.

FIG. 2 is a schematic explanatory view of a linear movement guide device according to a conventional example.

FIG. 3 is a cross-sectional view of the linear movement guide device according to the first embodiment of the present invention.

FIG. 4 is a plan view of the spacing member used in the linear movement guide device according to the embodiment of the present invention;

FIG. 5 is an exploded plan view of a main part of a linear movement guide device according to a second embodiment of the present invention.

FIG. 6 is a plan view of a main part of a linear movement guide device according to a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 21 Leader (fixed member) 22 Support member 23,24,51,52 Guide rail 25 Support arm 26 Connecting plate 27 Welding 28 Shaft-shaped roller (first split roller) 29,44,58 Gap adjusting member 30 Ring-shaped roller ( Second split roller) 31, 45 Rolling bearing 32, 49 Washer 33, 50 Nut 34, 37, 40, 41, 53, 56 Split sliding contact surface 35 Shaft (roller shaft) 36, 47 Screw portion 38 Outer ring 39 Moving work Appliances 42, 43, 54, 57 Split rollers 48, 57 Roller shafts A, B, C Guide rollers

Claims (2)

(57) [Scope of request for utility model registration] 1. A guide roller pivotally attached to a moving member side and having a groove-shaped sliding contact surface formed on an outer periphery of a rotating portion, and fitted to a fixed member side and adapted to a groove-shaped sliding contact surface of the guide roller. The guide roller on which the convex rolling surface is formed is engaged, and the guide roller moves while sliding and rotating on the convex rolling surface of the guide rail extending along the moving direction of the moving member. In the linear movement guide device in which the member is guided, the guide roller is detachably fitted to the first and second divided rollers which are fixedly connected to the roller shaft via the fastening means, and to the roller shaft. A plurality of gap adjusting members interposed between the joints of the divided rollers, and a rolling bearing having an inner ring side fixedly connected to the roller shaft and an outer ring side fixed to the moving member side. The first and second divided sliding contact surfaces which are combined with the convex rolling surface of the guide rail when combined together are formed on the outer periphery of each of the divided rollers. A linear movement guide device wherein a loss due to wear of a sliding contact portion is corrected by attaching and detaching the gap adjusting member. 2. The first split roller has a first split sliding contact surface corresponding to approximately one half of a convex rolling surface of the guide rail formed on an outer periphery on a base side, and the base portion has a first split sliding contact surface. A shaft-shaped roller provided with a shaft serving as the roller shaft protruding from the side thereof. The shaft portion of the shaft-shaped roller is provided on the outer periphery thereof through the gap adjusting member at approximately 2 mm of the convex rolling surface of the guide rail. A ring-shaped second split roller having a second split sliding contact surface corresponding to one-half is attached, and the first and second split sliding contact surfaces are combined to form a convex rolling of the guide rail. 2. The linear movement guide device according to claim 1, wherein an arc-shaped or U-shaped groove-shaped sliding contact surface that fits the surface is formed.