JP5533934B2 - Construction machine filter mounting structure - Google Patents

Description

  The present invention relates to a filter mounting structure for detachably mounting a filter to a filter mounting portion provided at a predetermined location of a construction machine.

  For example, Patent Document 1 discloses a technique related to a filter mounting structure of a construction machine. In the filter mounting structure described in Patent Document 1, an elastic body made of a leaf spring is arranged on one side surface of the filter, and a U-shaped engagement claw is fixed on the other side surface of the filter. Further, an engagement hole for engaging the engagement claw is provided in the filter mounting portion.

  When attaching the filter, first, the end of the filter is applied to an elastic body made of a leaf spring, and the filter is pushed in the width direction of the filter mounting portion while elastically deforming the elastic body. Then, the filter is pressed in the thickness direction of the filter mounting portion while resisting the elastic force (restoring force) of the elastic body, and an engagement claw fixed to the side surface of the other end of the filter is provided on the filter mounting portion. Engage with the engagement hole (see, for example, FIGS. 2 to 4 of Patent Document 1).

  According to this structure, compared to a mounting structure using a fastener such as a butterfly bolt, troublesome fastening operations and alignment are not required, and the fastener is not lost.

JP 2008-208551 A

  The present invention is a further improvement of the filter mounting structure described in Patent Document 1. As described above, in the filter mounting structure described in Patent Document 1, an elastic body is arranged on one side surface of the filter, and an engaging claw is fixed on the other side surface of the filter. That is, the filter mounting members are arranged on both sides of the filter. Further, in the filter mounting operation, it is necessary to push the filter against the elastic force (restoring force) of the elastic body in both the width direction and the thickness direction of the filter mounting portion in either direction.

  In the embodiment shown in FIG. 7 of Patent Document 1, the elastic body is only disposed on the side surface of one end of the filter. However, in this embodiment, since the engagement claw is not provided on the side surface of the other end portion of the filter, final alignment (fine adjustment) of the filter is necessary when the filter is attached. In the filter mounting operation, as in the other embodiments described in Patent Document 1, in the width direction and the thickness direction of the filter mounting portion, in any of these directions, resists the elastic force (restoring force) of the elastic body. The filter is pushed in.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a filter mounting structure for a construction machine that has a simpler structure than that of the prior art and that is superior in workability.

  The present invention is a filter attachment structure for detachably attaching a filter to a filter attachment portion provided at a predetermined location of a construction machine. An elastic handle is fixed to the side surface of the filter, and an engaged portion with which the handle is engaged is provided on a surface of the filter mounting portion that faces the side surface of the filter. The handle is fixed to a side surface of the filter, a protrusion-shaped engaging portion that extends from the fixing portion and engages with the engaged portion, and extends from the engaging portion. And a grip portion provided with a gap between a side surface of the filter and a portion on the engagement portion side. When the filter is attached to the filter attaching portion, the engaging portion is engaged with the engaged portion by the elastic recovery force of the handle. When removing the filter from the filter mounting portion, the engaging portion and the engaged portion are rotated by rotating the grip portion toward the filter against the elastic recovery force with the fixing portion as a fulcrum. Release the engagement.

  ADVANTAGE OF THE INVENTION According to this invention, it can be set as the filter mounting structure of a construction machine which is simpler than before and excellent in workability | operativity.

It is a perspective view which shows the counterweight circumference of a hydraulic excavator for showing the putting in / out state of a filter. It is a perspective view which shows the state in which the filter was attached to the duct. It is a perspective view of a filter. They are a top view (Drawing 4 (a)) and a front view (Drawing 4 (b)) of a filter. FIG. 5 is an enlarged view of a portion where a handle is attached to the filter of FIG. It is a perspective view of a duct. It is explanatory drawing which shows the attachment procedure of a filter. It is explanatory drawing which shows the removal procedure of a filter.

  The present invention is applied to, for example, a hydraulic excavator among various construction machines. The filter according to the present invention is attached to the front side (upstream side of the suction air flow) of a cooler such as a radiator installed in the engine room of a hydraulic excavator, for dustproofing and insectproofing. For the outline of the hydraulic excavator, the position where the filter is attached to the hydraulic excavator, and the like, refer to, for example, paragraphs 0003 to 0022 of Patent Document 1 (Japanese Patent Laid-Open No. 2008-208551).

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  As shown in FIG. 1, for example, left and right maintenance ports 22, 23 and a maintenance panel that opens and closes these are provided in a counterweight 21 that also serves as an engine room forming exterior body that is attached to the rear part of an upper swing body of a hydraulic excavator. 24 and 25 (in FIG. 1, 26 is a hinge serving as an opening / closing fulcrum of the left maintenance panel 24), and the filter 1 is put in and out of the left maintenance port 22.

  That is, the filter 1 according to the present embodiment is a filter that is detachably installed in the engine room of a hydraulic excavator, for example, and includes dust contained in cooling air supplied to a cooler / engine such as a radiator. It is for removing.

  The filter mounting structure of the present embodiment will be described with reference to FIGS. In this embodiment, the filter 1 is attached to the tip of the duct 2 for guiding the cooling air to a cooler such as a radiator. However, the place where the filter 1 is attached is not limited to the tip of the duct 2. .

(filter)
The filter 1 has a filter frame 5 attached around the filter body 4. In order to increase the surface area, the filter body 4 is formed in a zigzag shape as in the present embodiment, for example. The filter body 4 and the filter frame 5 are, for example, rectangular. An elastic handle 6 is fixed to a side surface 5a of the filter frame 5 (side surface of the filter 1). In addition, nothing is attached to the side surface of the filter frame 5 (filter 1) opposite to the side on which the handle 6 is fixed.

  The handle 6 is fixed to the center of the side surface 5 a of the filter frame 5. In addition, the handle 6 may be fixed to the upper part or the lower part of the side surface 5a of the filter frame 5, or the handle 6 may be fixed to both the upper part and the lower part. Furthermore, the handle 6 may be fixed to any one of the side surfaces in the vertical direction instead of the side surface 5a in the width direction of the filter frame 5 (filter 1).

(Details of handle)
The detailed structure of the handle 6 will be described with reference to FIG. As shown in FIG. 5, the handle 6 includes a fixing portion 8 that is fixed to the side surface 5 a of the filter frame 5, a mountain-shaped engaging portion 9 that extends from the fixing portion 8, and an extension from the engaging portion 9. It is comprised from the holding part 10 to perform.

  The handle 6 is formed, for example, by bending a metal plate. The plate thickness is appropriately selected so as to be elastically deformed by human force. The material of the handle 6 may be a resin. In this case, the handle 6 is manufactured by injection molding or the like. Further, the shape of the handle 6 may be a bar shape instead of a plate shape as in the present embodiment.

  The fixing portion 8 is fixed to the side surface 5a of the filter frame 5 by, for example, rivets 12.

  The engaging portion 9 is inclined obliquely in a direction in which the portion 9a on the fixing portion 8 side is away from the side surface 5a of the filter frame 5 (side surface of the filter 1) in the direction from the fixing portion 8 side to the engaging portion 9 side. It is formed to be bent.

  Further, the engaging portion 9 is inclined in a direction in which the portion 9b on the gripping portion 10 side approaches the side surface 5a of the filter frame 5 (side surface of the filter 1) in the direction from the engaging portion 9 side to the gripping portion 10 side. It is formed by being bent so as to be inclined.

  In addition, the engaging part 9 should just be the convex shape (protrusion shape) which protrudes in the direction away from the side surface 5a of the filter frame 5, and is not limited to the shape of this embodiment.

  The grip portion 10 has a portion 10 b on the engagement portion 9 side that is separated from the side surface 5 a of the filter frame 5 by a predetermined distance. That is, a gap S is provided between the portion 10 b of the grip portion 10 on the engaging portion 9 side and the side surface 5 a of the filter frame 5. The gap S is provided for retracting the engaging portion 9 on the side surface 5 a side of the filter frame 5.

  As shown in FIG. 5, in this embodiment, the boundary portion P between the engaging portion 9 and the grip portion 10 is located within the thickness of the filter frame 5 (not protruding from the end surface 5e of the filter frame 5). However, the boundary portion P between the engaging portion 9 and the grip portion 10 may protrude from the end surface 5 e of the filter frame 5. That is, the boundary portion P between the engagement portion 9 and the grip portion 10 protrudes from the end surface 5e of the filter frame 5 (the end surface of the filter 1), and the portion 10b of the grip portion 10 on the engagement portion 9 side and the filter frame. The clearance gap S may be provided between the 5 side surfaces 5a.

  Moreover, the front-end | tip part 10a of the holding part 10 is extended diagonally in the direction which leaves | separates from the filter frame 5 (filter 1) in the direction which goes to the said holding part 10 side from the engaging part 9 side. Note that the direction of the distal end portion 10a of the grip portion 10 is not limited to the present embodiment. For example, it may extend straight from the portion 10b of the grip portion 10 on the engaging portion 9 side.

(duct)
A frame 3 (filter attachment portion) for attaching the filter 1 is provided at the tip of the duct 2. In a state where the filter 1 is attached to the frame 3, a slit 7 (engaged portion) that engages with the engaging portion 9 of the handle 6 is formed on a surface 3 a of the frame 3 that faces the side surface 5 a of the filter frame 5. ) Is provided. The slit 7 is an elongated rectangular hole. The engaged portion with which the engaging portion 9 of the handle 6 is engaged is not limited to this shape. For example, it may be an elongated elliptical hole. Furthermore, the engaged portion with which the engaging portion 9 engages may not be a long and narrow hole that penetrates, but may be a bottomed recess (for example, a long and narrow recess).

  The frame 3 is provided with a filter contact surface 3b facing the upstream side of the airflow on the entire circumference. The filter abutment surface 3b is mainly for preventing the filter 1 from being removed by an air flow. When the filter 1 is attached to the frame 3, the filter abutment surface 3b does not necessarily contact the filter abutment surface 3b. There is no contact. The filter contact surface 3b serves as a guide when the filter 1 is pushed into the frame 3.

  Further, a hook 11 of the filter 1 is provided on the side plate portion opposite to the surface 3 a of the frame 3. The hook portion 11 is formed, for example, by bending the side plate portion of the frame 3 by 90 °. By providing the hook portion 11, the filter 1 is difficult to be detached from the frame 3 in a state where the filter 1 is attached to the frame 3.

  Next, the procedure for attaching and removing the filter 1 will be described with reference to FIGS. FIG. 7 is an explanatory diagram showing a procedure for attaching the filter 1, and FIG. 8 is an explanatory diagram showing a procedure for removing the filter 1.

(Installation procedure)
When the filter 1 is attached to the frame 3 (filter attachment portion) provided in the duct 2, first, the filter 1 starts from the end opposite to the side on which the handle 6 is fixed substantially along the width direction of the frame 3. Is pushed into the frame 3 (FIG. 7A).

  When the end portion of the filter 1 comes into contact with the inner surface of the frame 3, the tip portion 10 a of the grip portion 10 of the handle 6 is pushed to resist the elastic recovery force of the handle 6 and the portion of the grip portion 10 on the engaging portion 9 side. 10b is rotated and applied to the filter frame 5 of the filter 1 (the holding portion 8 of the handle 6 is used as a fulcrum to rotate the gripping portion 10 against the elastic recovery force) (FIG. 7 (b)). . (Thus, the engaging portion 9 does not hit the side plate of the frame 3 in the next operation.)

  Thereafter, the grip portion 10 is pushed to the back side in the thickness direction of the frame 3 to push the end portion of the filter 1 on the side on which the handle 6 is fixed into the frame 3, and then the hand is released from the grip portion 10. Thereby, the engaging part 9 of the handle 6 is engaged with the slit 7 by the elastic recovery force of the handle 6 (FIG. 7C). The turning operation of turning the gripping part 10 to the filter side against the elastic recovery force and the pushing operation of the filter 1 to the depth direction in the thickness direction of the frame 3 are performed almost simultaneously. By these operations, the filter 1 is attached to the frame 3 (filter attachment portion).

  Note that when the filter 1 is pushed into the depth direction of the frame 3 in the thickness direction, the turning operation for turning the grip portion 10 toward the filter side is not necessarily required. The engaging portion 9 provided on the handle 6 is inclined so that the portion 9a on the fixing portion 8 side is inclined in the direction away from the side surface of the filter 1 in the direction from the fixing portion 8 side to the engaging portion 9 side. Therefore, when the filter 1 is pushed in the thickness direction of the frame 3, the portion 9a on the fixed portion 8 side of the engaging portion 9 hits the side plate of the frame 3, and then the top portion of the engaging portion 9 is naturally filtered by elastic deformation. It retracts to one side (this is one of the functions and effects of the filter mounting structure of this embodiment). When the engaging portion 9 reaches the position of the slit 7, the engaging portion 9 is fitted into the slit 7 by the elastic recovery force.

(Removal procedure)
When removing the filter 1 from the frame 3 (filter mounting portion) provided in the duct 2, first, the grip portion 10 is rotated toward the filter 1 against the elastic recovery force with the fixing portion 8 of the handle 6 as a fulcrum. By doing so, the engagement between the engagement portion 9 of the handle 6 and the slit 7 is released (FIG. 8B).

  Thereafter, the grip 10 is pulled in front of the frame 3 in the thickness direction, and the end of the filter 1 on the side to which the handle 6 is fixed is pulled out from the frame 3 (FIG. 8C). Note that the turning operation of turning the gripping part 10 toward the filter against the elastic recovery force and the pulling-out operation of the filter 1 toward the front side in the thickness direction of the frame 3 are performed substantially simultaneously. Thereafter, the filter 1 is all pulled out from the frame 3 substantially along the width direction of the frame 3. By these operations, the filter 1 is removed from the frame 3 (filter mounting portion).

(Action / Effect)
The filter mounting structure of the present embodiment allows the filter to be attached and detached simply by attaching the elastic handle 6 only to one side surface 5a of the filter frame 5 (one side surface of the filter 1). On the other hand, in the filter mounting structure described in Patent Document 1 (Japanese Patent Laid-Open No. 2008-208551), as described above, an elastic body is arranged on one side surface of the filter, and on the other side surface of the filter. The engaging claw is fixed. That is, according to the filter mounting structure of the present embodiment, the number of parts for attaching and detaching the filter can be reduced, that is, the mounting structure can be made simpler than the conventional one. This can reduce costs.

  Further, according to the filter mounting structure of the present embodiment, the elastic force is applied only when the filter 1 is moved (push-in or pulled out) in the thickness direction of the frame 3 (filter mounting portion) in the mounting / detaching operation (detaching operation) of the filter 1. The filter 1 may be moved while resisting (elastic recovery force). When the filter 1 is moved in the width direction of the frame 3 (pushing or pulling out), resistance due to elastic force (elastic recovery force) does not work. On the other hand, according to the filter mounting structure described in Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2008-208551), the elastic force (elastic recovery) of the elastic body in both the width direction and the thickness direction of the filter mounting portion. It is necessary to move (push or pull out) the filter while resisting force. That is, the filter mounting structure according to the present embodiment is superior to the structure described in Patent Document 1 (Japanese Patent Laid-Open No. 2008-208551) not only in a simple mounting structure but also in the attachment / detachment workability of the filter.

  Moreover, in this embodiment, the front-end | tip part 10a of the holding part 10 of the handle 6 is extended diagonally in the direction which leaves | separates from the filter frame 5 (filter 1) in the direction which goes to the said holding part 10 side from the engaging part 9 side. ing. For example, in the removal work of the filter 1, the worker grasps the tip part 10 a of the grip part 10 and pulls out the end part of the filter 1 on the side to which the handle 6 is fixed. At this time, the distal end portion 10a of the grip portion 10 is extended obliquely in a direction away from the filter frame 5 (filter 1) in the direction from the engagement portion 9 side to the grip portion 10 side. Is easy to rotate the gripping part 10 toward the filter 1 (can be rotated naturally). This is because the component force of the force to be pulled out acts in a direction in which the grip portion 10 is rotated to the filter 1 side.

  Further, in the present embodiment, the engaging portion 9 provided on the handle 6 has the side surface 5a of the filter frame 5 in the direction in which the portion 9b on the gripping portion 10 side moves from the engaging portion 9 side to the gripping portion 10 side. It is inclined obliquely in a direction approaching (the side surface of the filter 1). According to this structure, when the operator pulls out the end portion of the filter 1 on the side to which the handle 6 is fixed by grasping the distal end portion 10a of the grip portion 10, the engaging portion 9 is engaged with the slit 7 (the engaged portion). Is hard to catch.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

1: Filter 2: Duct 3: Frame (filter mounting part)
4: Filter body 5: Filter frame 5a: Side surface of filter frame (side surface of filter)
6: Handle 7: Slit (engaged part)
8: Fixing part 9: Engaging part 10: Holding part 10a: Tip part S: Gap

Claims (4)

In the filter mounting structure for detachably mounting the filter to the filter mounting portion provided at a predetermined location of the construction machine,
An elastic handle is fixed to the side surface of the filter,
An engaged portion with which the handle is engaged is provided on a surface of the filter mounting portion that faces the side surface of the filter.
The handle is
A fixing portion fixed to a side surface of the filter;
A projecting engagement portion extending from the fixed portion and engaging the engaged portion;
A gripping part that extends from the engaging part and is provided with a gap between a side surface of the filter and a part on the engaging part side,
When attaching the filter to the filter attachment portion, the engaging portion is engaged with the engaged portion by the elastic recovery force of the handle,
When removing the filter from the filter mounting portion, the engaging portion and the engaged portion are rotated by rotating the grip portion toward the filter against the elastic recovery force with the fixing portion as a fulcrum. A structure for attaching a filter to a construction machine, wherein the engagement with the filter is released. The construction machine filter mounting structure according to claim 1,
A filter mounting structure for a construction machine, wherein a tip end portion of the grip portion extends obliquely in a direction away from the filter in a direction from the engagement portion side to the grip portion side. The construction machine filter mounting structure according to claim 1 or 2,
The filter mounting of a construction machine, wherein a portion of the engaging portion on the fixed portion side is inclined obliquely in a direction away from the filter in a direction from the fixed portion side toward the engaging portion side. Construction. In the filter attachment structure of the construction machine in any one of Claims 1-3,
The filter mounting of a construction machine, wherein a portion of the engagement portion on the gripping portion side is inclined in a direction approaching the filter in a direction from the engagement portion side to the gripping portion side. Construction.

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