JP2011032811A - Canopy of construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent generation of fixation while adopting an inexpensive support-division method with a simple structure; and to reduce a labor burden in attaching/detaching an upper support body by making a lifting margin of the upper support body in attaching/detaching to be approximately zero. <P>SOLUTION: A support 9 is divided into a lower support body 11 which is attached to a revolving superstructure 2 and the upper support body 12 to which a roof 10 is attached. Further, both the support bodies 11, 12 are detachably connected by bolts by the intermediary of a connecting member 13, which serves as a guide and is mounted at a lower end of the upper support body 12, in a state where the end surfaces of the support bodies come into contact with each other. The connecting member 13 is formed to have an L-shaped horizontal cross section, and one surface thereof is brought into contact with the front surface of the lower support body 11 and the other surface thereof is brought into contact with the inside side surface of the lower support body 11 facing the other surface, whereby positioning and retaining actions of the upper support body 12 to the lower support body 11 are performed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a canopy provided in a small construction machine such as a mini excavator.

  The background art will be described using a mini excavator as an example.

  As shown in FIG. 8, the mini excavator has an upper swing body 2 mounted on a crawler type lower traveling body 1 so as to be rotatable around a vertical axis perpendicular to the ground. A canopy 4 that covers the driver's seat 3 from above is provided, and a work attachment 5 is attached to the front.

  The canopy 4 is configured by attaching a roof 7 to the upper end of a column 6 attached to the rear part of the machine body (upper revolving unit 2).

  In the figure, a two-post type in which the support 6 is provided on both the left and right sides is illustrated, but a single support type in which only one support 6 is provided at the center of the rear, or the support 6 is provided on the left and right sides and the rear. There is also a three-pillar type with three.

  In such a canopy 4, the column 6 may get in the way when passing through a low place such as the entrance of a building or the eaves of a house.

  In this case, in a general structure in which the entire canopy is removed from the machine body, the burden on the operator is too great.

  Therefore, as a countermeasure, as shown in Patent Document 1, the support column is divided into a lower support column (represented as “joint” in the same document) and an upper support member, and both support columns are placed inside and outside. Insertion structure for fitting (Prior Art 1) and as shown in Patent Document 2, the column can be rotated about the horizontal axis in the horizontal direction with respect to the machine body and the roof with respect to the column. There is a known structure (No. 2 in the publicly known technique) in which the roof is moved to a low position while being mounted and tilted to tilt the support.

Japanese Utility Model Hei 3-109939 JP 10-29559 A

  However, in the known technique 1 (insertion structure with a column splitting system), the structure is simple and inexpensive, but the upper structure that combines the upper column and roof is separated from the lower column of the upper column. It must be lifted up and removed, and since the lifting cost is large, the labor burden on the operator is still large.

  In addition, since the fitting structure is used, there is a case where the fitting portion is rusted or “adhering” in which the upper support body does not move due to earth and sand that has entered the fitting portion, and may not come off.

  On the other hand, the conventional technique 2 (rotation structure) requires less labor, but the structure for holding the canopy and the canopy in the use posture and the lying posture is complicated and expensive, and the rotation is possible. There is a problem that the wear of the part leads to looseness and the durability is inferior.

  Therefore, the present invention can prevent the occurrence of sticking while adopting a simple structure and inexpensive column splitting system, and can reduce the labor burden at the time of attaching and detaching by making the lifting margin at the time of attaching and detaching the upper column body almost zero. A canopy for a construction machine that can be used.

  The invention according to claim 1 is a canopy for a construction machine in which a roof is attached to the upper end of a support column. The support column includes a lower support body attached to the machine body, and a lower end surface which is in contact with an upper end surface of the lower support column. It is divided into an upper strut body that is placed on the lower strut body in contact with it, and protrudes toward the other strut body from either the lower strut body or the upper strut body, and the outer periphery of the other strut body. A connecting member serving also as a guide that comes into contact with the surface is provided, and the connecting member serving also as a guide and the other support column are detachably connected by a fastening means.

  According to a second aspect of the present invention, in the canopy of a construction machine configured by attaching a roof to the upper ends of a plurality of columns, each column includes a lower column body attached to the machine body, and a lower end surface of the lower column body. An upper support body that is connected to the lower support body in contact with the upper end surface of the upper member, and a connecting member that connects the lower and upper support bodies, and at least one of the support structures, The connecting member is provided on one of the lower and upper struts as a guide that protrudes toward the other strut body and contacts the outer peripheral surface of the other strut body. The member and the other column body are detachably connected by fastening means.

  According to a third aspect of the present invention, in the configuration of the first or second aspect, the connecting member serving also as a guide is provided to protrude downward at a lower end portion of the upper support column.

  According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the contact plate is attached to the upper end of the lower support body and the lower end of the upper support body respectively.

  According to a fifth aspect of the present invention, in the configuration of the fourth aspect, among the contact plates of the lower and upper support columns, there are protrusions on one of the contact plates, and fitting holes into which the protrusions are fitted on the other support plate, respectively. It is provided.

  According to a sixth aspect of the present invention, in the structure according to any of the first to fifth aspects, the lower and upper support columns are formed in a square pipe shape, and the connecting member serving also as a guide is adjacent to the other support column. It is formed in a horizontal cross-section L-shape having two surfaces that contact the two surfaces.

  According to a seventh aspect of the present invention, in the configuration of the sixth aspect, the connecting member serving also as a guide is configured so that one surface is in contact with the front surface of the other column body and the other surface is in contact with the left and right side surfaces of the column body. It is attached to one column body.

  According to the present invention, since the upper columnar body is placed on the lower columnar body in a state in which the end faces thereof are in contact with each other and connected by the connecting member, the fitting portion is different from the one insertion structure of the known technique. Since there is no possibility of sticking, there is no fear of sticking, and the lifting allowance when attaching and detaching the upper support is almost zero (in the case of claim 5, only the height of the protrusion), and the burden on the operator can be greatly reduced. .

And since it is the structure which connects this connecting member to the other by a fastening means in the state where the connecting member for both guides which protruded from one supporting body contacted the outer periphery of the other supporting body,
(A) The upper column can be easily positioned on the lower column.

  (B) In this positioning state, if a force is applied so as to lightly press the connecting member against the other supporting column, the upper supporting column can be held on the lower supporting column sufficiently stably until the connection is completed.

  (C) The connecting member that has become a positioning guide may be connected to the other column body as it is.

  In addition, the operation of (b) and (c) makes it easy to remove the upper column body.

  In this way, the upper column body can be attached and detached easily and quickly with a minimum of labor, although the column structure is used and the upper column body is mounted on the lower column body.

  Here, in the case of a canopy provided with a plurality of struts, it is desirable to take the above configuration for all the struts (a configuration in which a connecting member serving as a guide is provided on one strut body), but only for one strut A configuration may be adopted (invention of claim 2).

  For example, even if the above configuration is adopted for only one strut and the other struts are connected to each other by a separate dedicated connecting member, the two strut type is taken as an example first. Positioning and holding the upper strut body of the strut with the combined connecting member, it is possible to position and hold other struts with this as the base point, so that the upper strut body can be easily attached and detached it can.

  Further, according to the invention of claim 3 in which the connecting member serving also as a guide protrudes downward from the lower end portion of the upper column body, as in the case where the member protrudes upward from the upper end portion of the lower column body, Since the connecting member does not remain in a horn shape with the upper support column removed, it is unavoidable especially in a place where the ceiling is low and the work is performed with the upper support column removed, and the appearance is good.

  According to the inventions of claims 4 and 5, since the contact plate corresponding to the end surfaces of both the lower and upper column bodies is provided, the stability of the mounting state and the positioning state of the upper column body is improved, and the attachment / detachment work is easier. Become.

  In particular, according to the invention of claim 5, since the protrusion provided on one of the contact plates is fitted into the fitting hole of the other contact plate, the effect of this point is further enhanced.

  According to the inventions of claims 6 and 7, when the support body is in the shape of a square pipe, the connecting member also serving as a guide is formed in an L-shaped horizontal section, and is configured to abut against two adjacent surfaces of the support body. The upper support can be guided and held in two directions. For this reason, the positioning and holding operation of the upper column body becomes easier.

  In this case, according to the seventh aspect of the present invention, since one surface of the connecting member serving as a guide is brought into contact with the front surface of the other column body and the other surface is brought into contact with one of the left and right side surfaces of the column member, the upper column body Can be easily and safely performed from the front side, that is, the driver's seat side, using the floor as a scaffold.

  In addition, in the case of a two-post type canopy in which the support columns are provided on both the left and right sides, the other side of the connecting member that serves also as a guide is brought into contact with the opposite inner side surfaces of both support columns, and one support column from the inner side surface side. For example, when it is configured to be bolted to the body, it is not necessary for the operator to go out of the machine and perform the fastening work as in the case of bolting from the outer surface side, so that the work is easy and safer.

It is a perspective view of the upper revolving structure of the mini excavator concerning the embodiment of the present invention. It is the same side view. It is a perspective view of a canopy. It is a disassembled perspective view of a canopy. It is a partial expansion perspective view of the connection part of the lower part and upper part support | pillar body in a canopy. It is sectional drawing of the connection state of the part of FIG. FIG. 7 is a view corresponding to FIG. 6 in a state where the upper support body is removed from the state of FIG. 6. 1 is an overall side view of a mini excavator to which the present invention is applied.

  An embodiment of the present invention will be described with reference to FIGS.

  In the embodiment, a mini excavator is applied in accordance with the description of the background art.

  The basic configuration of this mini excavator is the same as that shown in FIG.

  That is, as shown in FIGS. 1 and 2, an upper swing body 2 is mounted on a crawler type lower traveling body so as to be rotatable about a vertical axis perpendicular to the ground. A canopy 8 that covers the driver's seat 3 from above is provided, and a work attachment is attached to the front.

  In the embodiment, the canopy 8 exemplifies a two-pillar type in which a roof 10 is attached to the upper ends of the left and right pillars 9 and 9 each having a square pipe shape.

  The both-side struts 9 and 9 have the same configuration, although the height dimension differs depending on the attachment portion with respect to the upper swing body 2.

  That is, the column 9 includes a lower column 11 attached to the machine main body (upper revolving unit 2), and an upper column placed on the lower column 11 with the lower end surface in contact with the upper end surface of the lower column 11. It is divided into a body 12, and both the column bodies 11, 12 are detachably connected by bolts 14, 14 as fastening means via a connecting member 13 serving also as a guide.

  As shown in detail in FIGS. 5 and 6, the connecting member 13 has a horizontal cross section L provided with two surfaces that abut the front surfaces of the support columns 11 and 12 and the inner side surfaces facing each other (hereinafter referred to as inner surfaces). It is formed in a letter shape, and is fixed to the lower end of the upper column 12 by welding or the like with the lower half protruding below the column 12.

  A thick plate-like mounting seat 15 is fixed to the front surface of the connecting member 13, and two upper and lower bolt through holes 16, 16 are provided across the connecting member 13 and the mounting seat 15.

  On the other hand, two cylindrical upper and lower bosses 17, 17 having female threads are provided at the same pitch as the bolt through holes 16, 16 on the inner side of the upper end portion of the lower support body 11, and the connecting member 13 (part protruding downward) ) Are screwed into the bosses 17 and 17 through the bolt through holes 16 and 16 in a state where the bolts 14 and 14 are in contact with the front surface and the inner surface of the lower column 11.

  Thereby, the connecting member 13, that is, the upper column body 12 is detachably coupled to the lower column body 11.

  Here, the contact plates 18 and 19 are welded and fixed to the upper end of the lower support body 11 and the lower end of the upper support body 12, respectively, and the upper support body 12 is in a state where the contact plates 18 and 19 are in contact with each other. Placed on top.

  In addition, a protrusion 20 projecting upward is provided on the contact plate 18 of the lower support body 11, and a fitting hole 21 is provided in the contact plate 19 of the upper support body 12. 21.

  The left and right columns 9, 9 are connected and integrated by a connecting beam 22 (see FIGS. 1, 3 and 4) suspended between the upper ends of the upper columns 12, 12.

  In FIGS. 1, 3, and 4, 23 and 23 are roof mounting arms projecting forward from the connecting beam 22, 24... Are roof mounting seats to which the roof 10 is mounted, and 25 and 25 are lower columns of both columns 9 and 9. This is a mounting seat for the upper-part turning body provided at the lower end of the bodies 11 and 11.

  A method of attaching and detaching the upper column body 12 with respect to the lower column body 11 will be described.

When installed
(i) The upper column body 12 is lifted, and the two surfaces of the connecting member 13 are brought into contact with the front surface and the inner surface of the lower column body 11 to be positioned directly above the lower column body 11.

  (ii) The upper column 12 is placed and held on the lower column 11 in a state where the contact plates 18 and 19 are in contact with each other.

  (iii) Screw in the bolts 14 and 14.

  As a result, the upper column 12 is connected to the lower column 11, and the canopy 8 is assembled on the upper swing unit 2 by performing this operation on the columns 9, 9 on both the left and right sides.

When removing
(I) Remove the bolts 14 and 14.

  (II) The upper support body 12 is moved forward by lifting the projection 20 by a small dimension that removes the projection 20 from the fitting hole 21.

  Thereby, the upper support | pillar body 12 can be removed from the lower support | pillar body 11, and it can pass through a low place in the state which made the total height low.

  Thus, since it is the structure which mounts the upper support | pillar body 12 on the lower support | pillar body 11 in the state which each end surface (the contact plates 18 and 19) contact | abuts, and connects with the connection member 13, there is no fitting part. Therefore, there is no risk of sticking as in the case of the insertion structure, and the lifting allowance when attaching and detaching the upper support 12 is almost zero (only the height of the protrusion 20 in the embodiment), which greatly reduces the labor burden on the operator. Can be reduced.

In addition, since the connecting member 13 serving also as a guide protruding from the lower end of the upper column 12 is in contact with the outer periphery of the lower column 11, the connecting member 13 is bolted to the lower column 11. ,
(A) The upper column 12 can be easily positioned on the lower column 11.

  (B) In this positioning state, if a force in a direction in which the connecting member 13 is lightly pressed against the lower column body 11 is applied, the upper column body can be held on the lower column body until the end of the connection.

  (C) The connecting member 13 used as a positioning guide may be connected to the other column body as it is.

  Further, the operation of (b) and (c) makes it easy to remove the upper column 12.

  As described above, it is possible to easily and quickly perform the attaching and detaching work of the upper support body 12 with a minimum amount of labor, although the structure is such that the upper support body 12 is mounted on the lower support body 11 by the support division system. it can.

  Further, since the connecting member 13 serving also as a guide protrudes downward from the lower end portion of the upper column body 12, the upper portion of the lower column body 11 protrudes upward as in the case where the member 13 protrudes upward. Since the connecting member 13 does not remain in a horn shape with the column body 12 removed, it is unavoidable especially in a place where the ceiling is low, and when working with the upper column body 12 removed, the appearance is good. .

further,
(a) Providing the contact plates 18 and 19 that are substantially in contact with the end surfaces of the lower and upper support columns 11 and 12;
(b) The mounting state at the time of attaching and detaching the upper support body 12 and the positioning at the time of attachment by two points of fitting the protrusion 20 provided on the lower backing plate 18 into the fitting hole 21 of the upper backing plate 19. The stability of the state is improved, and attachment / detachment work becomes easier.

  In addition, since the connecting member 13 is formed in an L-shaped horizontal cross section corresponding to the square pipe-like columnar bodies 11 and 12 and is brought into contact with two adjacent surfaces of the lower columnar body 11, the upper columnar body 12 is moved in two directions. Can be guided and held. For this reason, the positioning and holding operation of the upper column body 12 becomes easier.

  In this case, since one surface of the connecting member 13 is brought into contact with the front surface of the lower column body 11 and the other surface is brought into contact with the left and right side surfaces of the column body 11, the attaching / detaching operation of the upper column body 12 is performed on the front surface side, that is, the driver seat side. Therefore, the floor can be easily and safely used as a scaffold.

  In this embodiment, in the two-post type canopy 8 in which the support column 9 is provided on both the left and right sides, the other surface of the connecting member 13 is brought into contact with the opposite inner side surfaces of the support columns 9 and 9. Since it is configured to be bolted to the lower support body 11 from the inner surface side, it is not necessary for the operator to go out to the outside of the machine and perform fastening work as in the case of bolting from the outer surface side. For this reason, the work is easy and safer.

Other embodiments
(1) In the above embodiment, in the two-post type canopy 8, the configuration in which the connecting member 13 serving also as a guide is provided on the upper support body 12 is adopted for the both-side support pillars 9, 9. The other support column 9 may have a structure in which the support columns 11 and 12 are connected to each other by a separate dedicated connection member (for example, having the same shape as the connection member 13 of the above embodiment).

  Even in this case, since the upper column body 12 of the column 9 provided with the connecting member 13 that also serves as a guide is positioned and held, the other column 9 can be positioned and held with this as a base point. The body 12 can be easily attached and detached.

  Further, the present invention can also be applied to a single support type canopy and a canopy including three or more support columns.

  (2) Regarding the connecting member 13 serving also as a guide, in the above-described embodiment, the member 13 is configured to come into contact with the front surface and the inner side surface of the lower column body 11. A configuration may be adopted in which either the left or right side is brought into contact.

  Further, the member 13 is not L-shaped in the horizontal section as in the above-described embodiment, but is a U-shaped horizontal section that fits in the front-rear direction with respect to the lower column body 11, and a flat plate shape that contacts the front surface of the column body 11. You may form in.

  Alternatively, when the support bodies 11 and 12 are round pipes, they may be formed in a corresponding arc shape.

  Further, in the above-described embodiment, the connecting member 13 serving also as a guide is provided at the lower end portion of the upper column body 12, but may be provided at the upper end portion of the lower column body 11.

  (3) The abutting plates 18 and 19 may be omitted, and the support columns 11 and 12 may be brought into contact with each other at their end faces.

  (4) Instead of the bolts 14 and the bosses 17 in the above embodiment, bolts and nuts or pins may be used as fastening means for connecting the support columns 11 and 12 to each other.

  (5) The present invention is not limited to mini excavators and can be widely applied to construction machines equipped with a canopy.

DESCRIPTION OF SYMBOLS 1 Lower traveling body which comprises machine main body 2 Same, upper turning body 3 Driver's seat 8 Canopy 9,9 Both-sides support | pillar 10 Roof 11 Lower support | pillar body 12 Upper support | pillar body 13 Connecting member 14 also used as a fastening means 14 Bolt 17 fastening means As bosses 18, 19 butt plate 20 projection 21 fitting hole

Claims (7)

  In a construction machine canopy configured with a roof attached to the upper end of the support column, the support column is mounted on the lower support unit with the lower support member attached to the machine body and the lower end surface in contact with the upper end surface of the lower support column. It is divided into an upper support body that is placed on the upper support body, and it serves as a guide that protrudes toward the other support body and contacts the outer peripheral surface of the other support body, on one of the lower and upper support bodies. A canopy for a construction machine, comprising a connecting member, wherein the connecting member serving also as a guide and the other support column are detachably connected by a fastening means.   In a canopy of a construction machine configured with a roof attached to the upper ends of a plurality of columns, each column includes a lower column attached to the machine body and a lower end surface in contact with the upper end surface of the lower column The upper support body connected on the lower support body and the connection member for connecting the lower and upper support bodies to each other, and at least one of the support pillars, the connection member is the lower support body. And the upper strut body, provided on both strut bodies as a guide that protrudes toward the other strut body and abuts on the outer peripheral surface of the other strut body. A canopy for a construction machine, characterized in that is detachably connected by fastening means.   3. A canopy for a construction machine according to claim 1, wherein the connecting member serving also as a guide is provided so as to protrude downward at a lower end portion of the upper support column.   The canopy for a construction machine according to any one of claims 1 to 3, wherein the upper plate of the lower column body and the lower end of the upper column body are respectively attached in a state in which the contact plate is substantially in contact therewith.   5. The construction according to claim 4, wherein a protrusion is provided on one of the support plates of the lower and upper support members, and a fitting hole is provided on the other support plate, in which the protrusion is fitted. Mechanical canopy.   Both the lower and upper struts are formed in a square pipe shape, and the connecting member serving also as a guide is formed in an L-shaped horizontal section having two surfaces that contact two adjacent surfaces of the other strut body. A canopy for a construction machine according to any one of claims 1 to 5.   The connecting member serving also as a guide is attached to the one supporting column body in a state where one surface is in contact with the front surface of the other supporting column body and the other surface is in contact with one of the left and right side surfaces of the supporting column body. Item 7. A construction machine canopy according to item 6.

Images