JP2001193379A - Casing guide device for construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a casing guide device for a construction machinery having a guide gib using a sliding member with square guide rail. SOLUTION: A cross-section shape of a pair of guide rails 4 provided on a leader is square. A guide gib 8 is furnished with a front surface member 30 and a back surface member 38 respectively opposed to a front surfaces 4a and a back surface 4c of the guide rail 4 and a side surface member 42 clamped by the front surface member 30 and the back surface member 38 and opposed to a side surface 4b of the guide rail 4. Grooves 54, 62, 72, 74 to store flat plate type sliding members 58, 60, 66, 68, 80, 82 are formed on each of opposed surfaces of the front surface member 30, the back surfaces member 38 and the side surface member 42 with the guide rail 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casing guide device for a construction machine for guiding a casing, in which a working mechanism such as an auger driving device and a hammer device, is incorporated, along a guide rail.

[0002]

2. Description of the Related Art Conventionally, as a casing guide device for a construction machine for guiding a casing along a guide rail, as disclosed in Japanese Utility Model Laid-Open Publication No. 7-38294, the casing is engaged with the guide rail via a guide gib. ,
There is known one in which a casing is slidably supported in a longitudinal direction of a guide rail.

In this case, the cross-sectional shape of the guide rail is round, and the cross-sectional shape of the leader of the construction machine is also round. Square readers that are effective in terms of surface are being used. Along with this, rectangular guide rails have come to be used from the viewpoint of suppressing torque reaction force.

A rectangular guide rail has a structure in which the front, side and back surfaces are slidably contacted with each other. Therefore, as disclosed in Japanese Patent Application Laid-Open No. 11-31539, a rectangular groove is formed in the guide give. There has been proposed a structure in which a guide rail is fitted into this groove to make three surfaces contact each other.

[0005]

However, in such a conventional apparatus, a flat sliding member made of resin or the like is provided between the guide gib and the guide rail as a measure against wear between the guide gib and the guide rail. If a sliding member made of resin is attached to the guide gib by a bolt, a sliding force acts between the sliding member and the bolt due to sliding resistance, and the sliding member may be damaged by the bolt. There was a problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a casing guide device for a construction machine having a guide gib using a sliding member with a square guide rail.

[0007]

In order to achieve the above object, the present invention takes the following means to solve the problem. That is, the casing of the construction machine for moving the casing incorporating the working mechanism along a pair of guide rails provided on the leader is engaged with the guide rail via a guide gib, and slides in the longitudinal direction of the guide rail. In a casing guide device for a construction machine movably supported,
The cross-sectional shape of the guide rail is a square, and the guide gib is a front member and a back member facing the front and back of the guide rail, respectively, and is sandwiched between the front member and the back member, and a side surface of the guide rail. Comprising a facing side member, the front member, the back member,
A casing guide device for a construction machine, wherein a groove for accommodating a flat sliding member is formed on each of the side surfaces of the side member facing the guide rail.

Further, it is preferable that the front member, the back member, and the side member are positioned by engaging a convex portion with a concave portion. The front member may be formed integrally with a base member of the casing. Further, a bolt penetrating through the back member and the side member may be screwed into the front member to fix the back member and the side member to the front member.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, reference numeral 1 denotes a self-propelled excavation machine, on which a leader 2 is erected, and a set of guide rails 4, 5 is provided on the leader 2 along its longitudinal direction. Has been laid. A casing 6 is slidably engaged with the guide rails 4 and 5 via four sets of guide gibs 8.

As shown in FIG. 2, the leader 2 has a rectangular cross section perpendicular to the longitudinal direction, and has guide rails 4 and 5.
Also, the shape of the cross section orthogonal to the longitudinal direction is square, and in this embodiment, square. These guide rails 4 and 5 are the leader 2
Is attached directly to the side surface of the reader 2 by welding or the like.

The reader 2 has a set of guide rails 4 and 5
A rack 10 is provided in parallel with the guide rails 4 and 5. A pinion gear (not shown) rotated by a motor 12 provided on the casing 6 is meshed with the rack 10, and the casing 6 can be moved up and down along the guide rails 4 and 5 by the rotation of the motor 12. It is configured as follows.

In the present embodiment, a rotary drive mechanism 14 is mounted on the casing 6, and the rotary drive mechanism 14 is configured to rotate the kelly bar 16 and to slide the kelly bar 16 in the longitudinal direction. I have. A wire 18 is fastened to the upper end of the kelly bar 16, and the wire 18 is drawn from a main winch 20 of the excavator 1 via a pair of sheaves 22 and 24 provided at an upper end of the leader 2.

An excavator 26 is attached to the lower end of the kelly bar 16. The drilling tool 26 includes, for example, a drilling bucket or the like and an auger drill. Note that what is incorporated in the casing 6 is not limited to the rotary drive mechanism 14, but may be another construction work mechanism such as an auger drive mechanism or a hammer mechanism.

The four sets of guide gibs 8 are provided on the upper, lower, left and right sides of the casing 6, respectively.
A description will be given centering on a pair of guide gibs 8 provided below. Since the structure of the other guide gibs 8 is the same, detailed description is omitted. As shown in FIG. 3, the front surface 4 a of the guide rails 4, 5,
Plate-shaped front members 30 and 32 are integrally attached to the side facing 5a. The front members 30 and 32 include
Protrusions 34, 36 having a rectangular cross section are formed in parallel with the guide rails 4, 5, respectively.

As shown in FIGS. 2 and 4, the guide give 8 has a flat back member 38 facing the back surfaces 4c and 5c of the guide rails 4 and 5. The back member 38 has a rectangular cross section. The protrusion 40 is provided in parallel with the guide rails 4 and 5. A side member 42 provided between the front member 30 and the back member 38 is provided.
The recesses 44 and 46 into which the projections 34 and 40 can be fitted are formed corresponding to the projections 4 and 40.

By fitting the projections 34, 40 into the recesses 44, 46, the front member 30, the rear member 38, and the side members 42 are configured to be positioned in the direction orthogonal to the guide rails 4, 5. . The thickness of the side surface member 42 is such that the front surfaces 4a and 5a of the guide rails 4 and 5 and the rear surface
It is formed with high precision according to the width between c and 5c.

A plurality of through holes 48 and 50 are respectively formed in the back member 38 and the side member 42, and a plurality of screw holes 52 are formed in the front member 30 correspondingly. ing. Then, the bolt 53 is inserted into the through holes 48 and 50 with the side member 42 interposed between the front member 30 and the back member 38, and the bolt 53 is screwed into the screw hole 52.
The front member 30, the back member 38, and the side members 42 are integrated.

On the other hand, the front member 30 has the guide rail 4
A groove 54 is formed in the facing surface 30a facing the.
A plurality of screw holes 5 are formed in the groove 54 along the guide rail 4.
6 is threaded. Two flat plate-like sliding members 58 and 60 are housed in the groove 54, and a bolt 61 inserted into through holes 58 a and 60 a formed in the sliding members 58 and 60 is screwed into the screw hole 56. Is fixed. The sliding members 58 and 60 are formed of resin in the present embodiment.

The groove 5 is formed so that the length of the two sliding members 58 and 60 arranged in the longitudinal direction is equal to the length of the groove 54.
The gap between the longitudinal side walls 54a, 54b of the guide rail 4 is precisely formed, and when the slide members 58, 60 are stored in the grooves 54, the surfaces of the slide members 58, 60 are formed on the front surface 4a of the guide rail 4. It is configured to contact. Note that the depth of the groove 54 is formed smaller than the thickness of the sliding members 58 and 60.

Similarly, a groove 62 is formed on the back surface member 38 on a facing surface 38a facing the guide rail 4. A plurality of screw holes 64 are formed in the groove 62 along the guide rail 4. In the groove 62, a flat plate-shaped 2
The sliding members 66, 68 are stored, and the sliding members 66, 6
8 is fixed by screwing a bolt 70 inserted into the through holes 66 a and 68 a formed in the screw hole 64. The sliding members 66 and 68 are formed of resin in the present embodiment.

The groove 6 is formed such that the length of the two sliding members 66 and 68 arranged in the longitudinal direction is equal to the length of the groove 62.
The gap between the longitudinal side walls 62a and 62b is formed with high precision, and when the sliding members 66 and 68 are stored in the grooves 62, the surfaces of the sliding members 66 and 68 are disposed on the back surface 4c of the guide rail 4. It is configured to contact. Note that the depth of the groove 62 is formed smaller than the thickness of the sliding members 66 and 68.

Further, the guide rail 4 is also provided on the side member 42.
The two grooves 72 and 74 are formed in the longitudinal direction of the guide rail 4 in the opposing surface 42a which opposes. In the grooves 72 and 74, a plurality of screw holes 76 and 78 are threaded along the guide rail 4. Sliding members 80, 82 each having a flat plate shape are received in the grooves 72, 74, and bolts 84 inserted into through holes 80a, 82a formed in the sliding members 80, 82 are screwed into the screw holes 76, 78. By being fixed. The sliding members 80 and 82 are formed of resin in the present embodiment.

The length of the sliding members 80, 82 in the longitudinal direction;
Grooves 72, 7 are set so that the lengths of grooves 72, 74 are the same.
4, the gaps between the longitudinal side walls 72a, 72b, 74a, 74b are precisely formed, and when the sliding members 80, 82 are stored in the grooves 72, 74, the surfaces of the sliding members 80, 82 are guided. It is configured to contact the side surface 4 b of the rail 4. The depth of the grooves 72, 74 is determined by the sliding members 80,
It is formed shallower than the thickness of 82.

The grooves 54 of the front member 30, the grooves 62 of the rear member 38, and the grooves 72, 74 of the side member 42 are milled by, for example, an end mill. Since the milling is performed before assembling with the bolt 53, the grooves 54, 62, 72, and 74 can be easily processed without interference between a tool such as an end mill and the front member 30, the back member 38, and the side member 42. can do. At that time, each groove 54, 62, 7
2, 74 longitudinal side walls 54a, 54b, 62a, 6
2b, 72a, 72b, 74a, 74b are formed substantially vertically.

Next, the operation of the above-described casing guide device for construction equipment of the present embodiment will be described. First, when the hydraulic motor 12 is rotationally driven, a pinion gear (not shown) is rotated, and the casing 6 is moved to the guide rails 4, 5.
It is raised and lowered along. At that time, the casing 6 is guided by the guide gibs 8 along the guide rails 4 and 5. The sliding members 58, 60, 66, 68, 80, 82 correspond to the front faces 4 a, 5 a and the side faces 4 b, 5 of the guide rails 4, 5.
b, slide while contacting the back surfaces 4c and 5c.

The frictional resistance at that time causes each sliding member 5
8, 60, 66, 68, 80 and 82 are acted on in the longitudinal direction. This acting force is applied to each of the sliding members 58, 60, 6
6, 68, 80, 82, each groove 54, 62, 72,
74, 54a, 54b, 62a, 62b, 72a,
Acts on 72b, 74a, 74b. Therefore, each sliding member 58, 60, 66, 68, 80, 82 and each bolt 6
Since no acting force in the shearing direction acts between the sliding members 58, 60, 66, 68, 80, 8.
2 is not damaged.

The present invention is not limited to such an embodiment at all, and can be implemented in various modes without departing from the gist of the present invention.

[0028]

As described in detail above, in the casing guide device for construction equipment according to the present invention, when the casing slides along the guide rail, the frictional resistance exerts an acting force on the sliding member. Since the force acts on the side wall of each groove via the sliding member, an effect in the shearing direction does not act between the sliding member and the bolt, so that the sliding member is not damaged. Play.

Further, when the front member, the back member, and the side member can be positioned by engagement of the projection and the recess,
Assembly becomes easy. Furthermore, by screwing and fixing a bolt penetrating the back member and the side member to the front member,
It can be configured with a small number of parts, and the assembly becomes easy.

[Brief description of the drawings]

FIG. 1 is a front view of an excavating machine using a casing guide device for construction machines as one embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a guide give of the embodiment.

FIG. 3 is a rear view of the base member of the embodiment.

FIG. 4 is an exploded perspective view of the guide give of the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Excavation construction machine 2 ... Leader 4, 5 ... Guide rail 6 ... Casing 8 ... Guide gib 10 ... Rack 14 ... Rotation drive mechanism 16 ... Keriva 20 ... Main winch 26 ... Excavation tool 28 ... Base member 30 ... Front member 38 ... Back surface Member 42 Side member 53 Bolt 54, 62, 72, 74 Groove 54a, 54b, 62a, 62b, 72a, 72b, 7
4a, 74b ... side walls 58, 60, 66, 68, 80, 82 ... sliding members

Claims (4)

[Claims] 1. A casing of a construction machine for moving a casing in which a working mechanism is incorporated along a pair of guide rails provided on a leader is engaged with the guide rail via a guide gib, and the longitudinal length of the guide rail is increased. In a casing guide device for a construction machine which is slidably supported in a direction, a cross-sectional shape of the guide rail is square, and the guide gib includes a front member and a rear member facing the front and back of the guide rail, respectively, and the front. A side member that is sandwiched between the member and the back member and faces the side surface of the guide rail. Each of the facing surfaces of the front member, the back member, and the side member with the guide rail has a flat plate shape. A casing guide device for a construction machine, wherein a groove for accommodating a sliding member is formed. 2. The casing guide device for a construction machine according to claim 1, wherein the front member, the back member, and the side member are positioned by engagement of a convex portion and a concave portion. 3. The apparatus according to claim 1, wherein the front member is formed integrally with a base member of the casing.
A casing guide device for a construction machine according to claim 2. 4. The front member according to claim 1, wherein a bolt penetrating the rear member and the side member is screwed into the front member, and the rear member and the side member are fixed to the front member. The casing guide device for a construction machine according to claim 3.