JP2011137295A - Clamp structure of attachment hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems of an existing clamp structure of an attachment hose used near the rotating pivot of an attachment such as a clamp structure in which the hose clamp itself is fixed not to be moved and a clamp structure in which a pivot shaft parallel to the rotating axis of the attachment is provided and the hose clamp is rotated thereabout wherein the behavior of the attachment hose by the rotation of the attachment cannot be avoided and a load is applied to the attachment hose by the behavior and the hose may be damaged. <P>SOLUTION: This hose clamp structure of an attachment hose includes a hose clamp member for holding the hose and a hose clamp supporting member for supporting the hose clamp member. The hose clamp member is allowed to behave within the range of the hose clamp supporting member. Consequently, a load applied locally to the attachment hose can be reduced. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a clamp structure for an attachment hose arranged for attachment operation in a construction machine such as a hydraulic excavator.

5 to 6 show a conventional hydraulic excavator.
FIG. 5A is a side view of the excavator, and FIG. 5B is a plan view of the excavator, and covers are appropriately deleted so that the layout of the device can be understood for reference.
FIG. 6A is a side view when the attachment is tilted downward, and FIG. 6B is a side view when the attachment is raised upward. Also in FIG. 6, devices unnecessary for the description of the present invention are appropriately deleted.
In FIG. 5, the attachment 4 includes a boom 4 a, an arm 4 b, and a bucket 4 c, and the boom 4 a rotates with a pin penetrating and supported between a pair of left and right vertical plates 6 formed on the main frame 5. The arm 4b is attached to the boom 4a, and the bucket 4c is attached to the arm 4b so as to be rotatable about a pin as an axis. (Unless otherwise noted, description will be made using the directions shown in FIGS. 5A and 5B.)
The attachment 4 undulates vertically by extending and contracting hydraulic cylinders 9a, 9b, 9c (hereinafter collectively referred to as a hydraulic cylinder 9) provided in the boom 4a, arm 4b, and bucket 4c, respectively. The expansion and contraction is controlled by supplying and discharging the pressure oil controlled by the hydraulic control valve 10 through a hydraulic hose 12 (hereinafter referred to as “attachment hose 12”).

For example, the hydraulic excavator 1 of the small rear turning type cannot secure a sufficient device arrangement space behind the machine. Therefore, since the hydraulic control valve 10 is arranged on the right side of the machine, some of the attachment hoses 12 are hydraulic. From the control valve 10 over the upper side of the vertical plate 6, it approaches the attachment 4, and thereafter it is routed along the attachment 4 to the hydraulic cylinder 9.
Further, the hydraulic control valve 10 is covered with a guard 11 or the like so that it cannot be directly seen from the exterior, so as to protect it from earth and sand and to prevent the drive sound of the hydraulic control valve 10 itself from divergence. (Hereinafter, the area around the hydraulic control valve 10 in the guard 11 is referred to as “valve chamber 11”.)

The attachment hose 12 is flexible because it moves following the rotation of the attachment 4. However, the attachment hose 12 is attached to the main frame 5 or the attachment 4 so that it does not move and contact the attachment 4 or the guard 11 to be damaged. It is fixed in various ways.
In the hydraulic excavator 1 in which the hydraulic control valve 10 is disposed on the right side of the machine, the attachment hose is fixed at least near the rotation fulcrum of the attachment 4 shown in FIGS. 6A and 6B (hereinafter referred to as “clamp position A”). ) And the right side surface of the boom 4a (hereinafter referred to as “clamp position B”). Further, between A and B, the attachment hose 12 can freely move following the rotation of the attachment 4. (The attachment hose 12 between A and B is referred to as “attachment side hose 12a”)

From the viewpoint of appearance, the upper surface side of the clamp member 22 of the attachment hose 12 and the outer surface of the valve chamber guard 11 at the clamp position A are laid out so as to be substantially the same surface, and the clamp member of the attachment hose 12 is further arranged. The gap between the guard 21 and the guard 11 is filled with an elastic member 29 such as insulation, rubber rubber or trim to prevent the drive sound of the hydraulic control valve 10 from leaking to the outside. In addition, rainwater, mud and the like are prevented from entering the valve chamber 11.

Moreover, since the rotation fulcrum of the attachment 4 and the behavior base point of the attachment hose 12a (corresponding to the clamp position A) are different, the required length of the attachment hose 12a varies depending on the rotation position of the attachment 4. For example, the minimum required hose length at the attachment position C and the attachment position D shown in FIGS. 6A and 6B without considering the minimum bending radius set for each attachment hose 12 is considered. When (solid line) is Lc and Ld, respectively, a difference of “Lc−Ld” is generated.

However, in practice, the minimum bending radius set for the attachment hose 12 must be taken into consideration, and the length of the attachment-side hose 12a from the clamp position A to the clamp position B is constant regardless of the position of the attachment 4. Therefore, the wiring lines of the attachment-side hose 12a at the position C and the position D at the length of the attachment-side hose 12a in consideration of them are as shown by dotted lines. That is, as the difference increases, the attachment hose 12a is more likely to bend at the position D, and there is interference between the attachment hose 12a and other parts (such as the attachment 4 and the guard 11) or the attachment hose side 12a. It becomes easy to generate | occur | produce and there exists a possibility that the damage of the attachment side hose 12a may generate | occur | produce.

In order to prevent such breakage, the difference of “Lc−Ld” may be reduced. In the case of the conventional hose clamp structure 21, the hose clamp member 22 is attached to the vertical plate 6 and the attachment at the clamp positions A and B, respectively. For example, when the attachment side hose 12a has a length indicated by a solid line in FIG. 6B, when the attachment 4 is rotated from the position D to the position C, the attachment side hose is fixed. 12a becomes a wiring line illustrated to the dotted line of Fig.6 (a). That is, since the attachment-side hose 12a near the clamp position A has a minimum bending radius or less, an excessive load is applied to the attachment-side hose 12a, and the attachment-side hose 12a is damaged.

In Patent Document 1, when the attachment hose 12 is fixed at the clamp position A, the attachment hose clamp structure 21 with the machine left-right direction (the same direction as the rotation axis of the attachment 4) as a support shaft is used. The hose clamp member 22 can be turned in accordance with the behavior of the attachment-side hose 12a following the movement 4.
By doing so, it is disclosed that the deflection amount of the attachment-side hose 12a can be reduced and the length of the attachment-side hose 12a can be shortened as compared with the conventional hose clamp structure.

In order to increase the bending radius when the attachment-side hose 12a bends as much as possible, the clamp position B is set as far as possible from the clamp position A. Furthermore, as shown in FIG. 6, considering the balance of the equipment arrangement of the hydraulic excavator 1, the hose length from the clamp position A to the clamp position B is longer than the hose length from the hydraulic control valve 10 to the clamp position A. Is set.
JP2008-7951

As described above, it is difficult for the hydraulic excavator 1 of the small rear swivel type to secure a device arrangement space, and a sufficient space for arranging the attachment hose 12 in the valve chamber 11 may not be ensured depending on the configuration requirements of the machine. In such a case, the hose arrangement (hereinafter referred to as “valve side hose 12b”) from the hydraulic control valve 10 to the clamp position A can be secured only to a minimum length.

If it becomes so, in the rotation hose clamp structure 21 described in patent document 1, there are concerns about the problems as described below.
1. Even if the hose clamp member 22 tries to rotate due to the behavior of the attachment-side hose 12a, the valve-side hose 12b is minimal, so the valve-side hose 12b has no allowance to behave in accordance with the rotation of the hose clamp member 22, The same problem as in the conventional fixed hose clamp occurs in that the hose clamp member 22 cannot rotate and the attachment-side hose 12a bends at the clamp positions A and B.
2.1. On the contrary, even if the hose clamp member 22 can be rotated by the behavior of the attachment-side hose 12a, the technique described in Patent Document 1 does not disclose a mechanism for limiting the rotation of the hose clamp member 22. That is, although the valve side hose 12b is pulled or bent by the rotation of the hose clamp member 22, since the hydraulic control valve 10 is fixed, all of these loads are applied to the valve side hose 12b and may be damaged. However, it may be possible to contact the hydraulic control valve 10. (Fig. 7 (a))

In addition, 1.2. In view of the above, even if the valve-side hose length 12b can be routed to a length that can accommodate the rotation of the hose clamp member 22, the following problems can be considered.
3. Since it is necessary to ascend above the hydraulic excavator 1 for maintenance or the like, a stepped step 13 that is recessed toward the valve chamber is configured using the guard 11 of the valve chamber. Therefore, the hose clamp member 22 may be bent to cause the valve-side hose 12b to bend and interfere with other parts such as the step 13 and the hydraulic control valve 10 to be damaged. (Fig. 7 (b))
4.3. For example, a hose guard can be attached as a countermeasure against interference in the case of, but this leads to deterioration in assemblability and cost increase due to an increase in the number of parts.

Moreover, as a problem of the hose clamp member 22 itself,
5. Since the support shaft 14 for supporting the rotation of the hose clamp is provided so as to penetrate the hose clamp member 22, the hose clamp member 22 corresponds to the space F necessary for the penetration of the support shaft 14 from the conventional fixed clamp dimension E. The structure itself increases. (Fig. 7 (c))

Further, in the conventional fixed clamp structure, since the gap between the hose clamp 21 and the guard 11 can be sealed, there are effects such as dust resistance, waterproofness, and soundproofing. However, in order to rotate the hose clamp member 22, a gap between the hose clamp member 22 and its surrounding members is essential. Then, the following problems occur.
6). Since the valve driving sound generated in the valve chamber leaks from the gap, it causes an increase in ambient noise. (Fig. 7 (d))
7). Rainwater, mud, etc. infiltrate from the gap, and the equipment in the valve chamber gets dirty. (Fig. 7 (d))

In the invention of claim 1, the lower traveling body 2, the upper swing body 3, the attachment 4 rotatably attached to the upper swing body 3, and the hydraulic cylinder 9 provided in the attachment 4 for operating the attachment 4. A hydraulic control valve 10 mounted on the upper swing body 3, a plurality of hydraulic hoses (only the attachment hose 12 shown) connected from the hydraulic cylinder 9 to the hydraulic control valve 10, and the hydraulic hose connected to the hydraulic cylinder 9. In the construction machine including the hose clamp structure 21 that holds the attachment hose 12 to be held in the vicinity of the rotation support portion of the attachment 4 so that the axial direction of the attachment hose 12 is aligned in the same direction.
The hose clamp structure 21
A hose clamp member 22 and a hose clamp support member 31;
The attachment hose 12 is held by a hose clamp member 22,
The hose clamp support member 31 is fixed to the upper swing body 3 and includes the hose clamp member 22, and a peripheral wall portion 34 that restricts the movement range of the hose clamp member 22 with respect to the direction orthogonal to the axial direction of the attachment hose 12, and the attachment The hose clamp member 22 is provided with at least two openings 35 through which the attachment hose 12 is inserted by being surrounded by the edge 35 and the edge 35 that limit the movement range of the hose clamp member 22 with respect to the axial direction of the hose 12. In the space surrounded by the peripheral wall portion 34 and the edge portion 35, at least one axial movement of the attachment hose 12 and a free-moving fit in one direction perpendicular to the shaft are freely fitted, and the opening 36 is in contact with the opposing hose clamp member 22. The attachment hose 12 is smaller than the surface when the hose clamp member 22 and the peripheral wall 34 come into contact with each other. It is clamped structure 21 of the attachment hose, characterized in that 35 and has a certain distance.

According to a second aspect of the present invention, in the first aspect, an elastic member 29 is provided in a space in which the hose clamp member 22 is movable with respect to the hose clamp support member 31, and the elastic member 29 is a hose clamp member 22 or a hose clamp support. It is the clamp structure 21 of the attachment hose 12 characterized by being affixed on either one or both of the members 31.

According to a third aspect of the present invention, in the second aspect, from the end portion 37 of the lower opening of the hose clamp support member 31, a wall portion 38 extending upward with the end portion 37 as a lower end, and the wall portion 38 The upper end limits the movement range of the hose clamp member 22 in the axial direction of the attachment hose 12, and a groove 39 is formed by the peripheral wall portion 34, the lower edge portion 35, and the wall portion 38 of the hose clamp support member 31. This is a clamp structure 21 of the attachment hose 12.

The invention according to claim 4 is the attachment according to claim 3, wherein a notch 40 is provided at least in the lower edge 35 of the peripheral wall 34, the lower edge 35 and the wall 38 forming the groove 39. This is a clamp structure 21 of the hose 12.

According to the invention of claim 5, in claim 5, the notch 40 is covered with one end of the guide hose 41, the other end of the guide hose 41 is routed outside the upper swing body 3, and the groove 39 and the hydraulic excavator 1 It is the clamp structure 21 of the attachment hose 12 characterized by making the outside communicate.

In the first aspect of the invention, the hose clamp member 22 is loosely fitted in the hose clamp support member 31 so that it can freely swing within a limited range.
That is, unlike the hose clamp structure that can only rotate about the axis of the support shaft (machine lateral direction) described in Patent Document 1, at least the axial direction of the attachment hose 12 according to the movement of the attachment-side hose 12a. Since the hose clamp member 22 can be moved more flexibly and can be moved in a direction perpendicular to the axis, and can be rotated, the attachment-side hose 12a is bent or locally bent. The hose clamp structure 21 is more effective than the technology. Further, since the hose clamp member 22 can limit the movement range by the peripheral wall portion 34 and the edge portion 35 of the hose clamp support member 31, no excessive force is applied to the valve side hose 12b, and the behavior of the valve side hose 12b is also laid out. The swing range of the hose clamp member 22 can be set in a range that takes into account the above. Further, by making the size of the opening 36 through which the attachment hose 12 is inserted smaller than the contact surface of the hose clamp member 22, the hose clamp member 22 is prevented from coming out, and the hose clamp member 22 and the peripheral wall portion 34 are in contact with each other. At this time, by providing a predetermined distance between the attachment hose 12 held by the hose clamp member 22 and the edge portion 35, contact between the attachment hose 12 and the hose clamp support member 31 is prevented, and the attachment hose 12 is damaged. I am trying to prevent it.

In the invention of claim 2, by transmitting the elastic member 29 between the hose clamp member 22 and the hose clamp support member 31, it is possible to transmit a collision sound and vibration when the hose clamp member 22 and the hose clamp support member 31 contact each other. In addition to preventing, the amount of noise leaking from the hydraulic control valve 10 generated in the valve chamber from the gap can be reduced, and further, rainwater and the like can be prevented from entering the valve chamber.

In the invention of claim 3, by making the lower part of the hose clamp support member 31 into the groove 39, it is possible to provide a tray for rainwater or mud that could not be prevented from entering through the gap. Therefore, it is possible to prevent rainwater and mud from diffusing into the valve chamber from the lower opening 36b and contaminating the equipment.

In the invention of claim 4, among the members forming the groove 39, at least the lower edge 35 is provided with the notch 40, so that it can be used as an outlet for rainwater and mud accumulated in the groove 39.

In the invention of claim 5, by providing the guide hose 41 that communicates with the outside of the upper swing body 3 from the notch of the groove 39, rainwater and mud received in the groove 39 can be effectively discharged to the outside of the valve chamber. it can.

It is an attachment hose attachment figure using the hose clamp structure which concerns on this invention seen from diagonally right back. Among the hose clamp structures according to the present invention, (a) is an assembly view of only a hose clamp member, and (b) is an assembly view of only a hose clamp support member. It is an exploded view of the hose clamp structure concerning the present invention. It is a mode of behavior of the hose clamp member in the present invention, (a) is a behavior in the front-rear direction, (b) is a behavior in the vertical direction, and (c) is a behavior at the time of rotation. It is the back small turning type hydraulic excavator 1, (a) is a side view, (b) is a plan view. It is a wiring diagram of the attachment hose 12a, (a) is when the attachment 4 is lying down, (b) is when the attachment 4 is upright. It is a figure which shows the problem in a prior art, (a) is the state in which the hose clamp member 22 rotates and a load is applied to the attachment side hose 12a, (b) is the state in which the hose clamp member 22 behaves and the valve side hose 12b The state in contact with other parts, (c) is a state in which the size of the hose clamp member 22 of Patent Document 1 and the present invention is compared, and (d) is from the gap between the hose clamp member 22 and the hose clamp support member 31. It is a diagram showing noise leakage and rainwater and mud intrusion.

An embodiment of the attachment hose clamping structure of the present invention will be described with reference to FIGS.

In the embodiment, since the basic configuration is the same as the prior art shown in FIGS. 5 and 6, components having the same function will be described with the same reference numerals.

In FIG. 5, the main configuration of the excavator 1 includes a lower traveling body 2, an upper revolving body 3 that is pivotably attached to the lower traveling body 2, and an excavation that is pivotally attached to the upper revolving body 3. It consists of an attachment 4 that performs such operations.
The rear small turning type hydraulic excavator 1 has a shape that suppresses the amount of the rear end protruding beyond the lower traveling body 2 as small as possible when the upper turning body 3 turns.

Therefore, since it is difficult to secure a device arrangement space at the rear part of the upper swing body 3, the following device arrangement is often obtained. That is, a cab having a driving device such as an engine 7 on the rear side of the main frame 5 having a pair of left and right vertical plates 6 and a cockpit for operating the hydraulic excavator 1 by an operator getting in front of the left side of the vertical plate 6. 8. A hydraulic control valve 10 for controlling the hydraulic cylinder 9 is mounted on the right side of the vertical plate 6.

Further, the periphery of the engine 7 and the hydraulic control valve 10 is covered with a guard 11 to prevent earth and sand from being directly contacted and damaged, and driving noise from leaking to the surroundings.

The attachment 4 attached to the front side of the main frame 5 includes a boom 4a, an arm 4b, and a bucket 4c. The boom 4a is supported by a pair of left and right vertical plates 6 formed on the main frame 5. The arm 4b is attached to the boom 4a and the bucket 4c is attached to the arm 4b so as to be rotatable about the pin.

The attachment 4 undulates vertically by extending and contracting hydraulic cylinders 9a, 9b, 9c (hereinafter collectively referred to as a hydraulic cylinder 9) provided in the boom 4a, arm 4b, and bucket 4c, respectively. Expansion and contraction of the cylinder 9 is controlled by supplying and discharging the pressure oil controlled by the hydraulic control valve 10 via the attachment hose 12.

The pressure oil is supplied and discharged by an attachment hose 12 connected to the hydraulic control valve 10 and the attachment 4, and the attachment hose 12 is attached to one hydraulic cylinder 9 and is connected to the rod side and the head side, respectively. , At least two are required.

Among these attachment hoses 12, in particular, the attachment hose 12 routed to the arm cylinder 9b and the bucket cylinder 9c passes the right vertical plate 6 from the hydraulic control valve 10 and approaches the right side surface of the boom 4a. The cable is routed toward the tip while being connected to the arm cylinder 9b and the bucket cylinder 9c.

The attachment hose 12 is flexible because it needs to move following the rotation of the boom 4a. For this reason, the attachment hose 12 is fixed as appropriate in order to prevent the attachment hose 12 from moving without a track and coming into contact with other parts such as the boom 4a and the guard 11, and to avoid the attachment hose 12 being rubbed and damaged. ing.

In FIG. 6, the fixing location of the attachment hose 12 will be described. The attachment hose 12 is the right side surface of the right vertical plate 6 before it crosses the right vertical plate 6, and the vicinity of the pivot point of the boom 4 a (clamp position A). The boom 4a is fixed at at least two locations on the right side surface (clamp position B).

This invention is about the clamp structure of the attachment hose 12 in the clamp position A, The detail is demonstrated below.

As described above, the attachment hose 12 is composed of a plurality of pieces (only two attachment hoses 12 are shown in FIGS. 1 and 4 to 6), and in FIG. 1, a hose clamp for fixing these attachment hoses 12. The structure 21 includes a hose clamp member 22 that directly holds the attachment hose 12 and a hose clamp support member 31 that supports the hose clamp member 22.

2 and 3, the structure of the hose clamp member 22 will be described.
The hose clamp member 22 has a substantially rectangular parallelepiped shape with the attachment hose 12 held therein, and a plurality of attachment hose insertion holes 24 have substantially elongated holes extending vertically and arranged in the front-rear direction. These insertion holes 24 are formed substantially at the center in the left-right direction of the hose clamp member 22, and the hose clamp member has a structure that can be divided into two at the center plane in the left-right direction. That is, since the insertion hole 24 is also divided, the attachment hose is sandwiched and held by the divided insertion hole 24, and the attachment hose can be easily passed through the insertion hole 24.

When the attachment hose 12 is held by the hose clamp member 22, the gap between the attachment hose 12 and the hose clamp member 22 can be eliminated and fixed firmly by attaching the grommet 25 to the attachment hose 12. Furthermore, by using the grommet 25, the attachment hose 12 can be protected, and even those having different hose diameters can be easily handled by simply changing the shape of the grommet 25.

The hose clamp member 22 sandwiching the attachment hose 12 is provided with bolt insertion holes 26 at two positions on the front and rear sides thereof, and the hose clamp member 22 divided by using bolts 27 and nuts 28 is fastened.

An elastic member 29 is attached to the hose clamp member 22 on the entire front and rear, left and right, and upper and lower outer frame portions. As a result, effects such as mitigation of impact when the hose clamp member 22 comes into contact with the hose clamp support member 31, suppression of the generation of impact noise, and reduction of leakage of driving sound of the hydraulic control valve 10 disposed in the valve chamber to the outside. There is. Since the hose clamp support member 31 and the hose clamp member 22 do not have to be in direct contact with each other, the elastic member 29 may be attached to the hose clamp support member 31 side or both sides of the hose clamp member 22 and the hose clamp support member 31. It may be pasted on.

Next, the structure of the hose clamp support member 31 will be described.
The hose clamp support member 31 has a substantially rectangular parallelepiped shape including the hose clamp member 22, and a body member 32 having an opening on the left side of the hose clamp support member 31 so that the hose clamp member 22 can be easily attached and detached. It is comprised with the cover member 33 which plugs up an opening part.

First, the structure of the hose clamp support member 31 will be described with the main body member 32 and the lid member 33 attached to the vertical plate 6.

As described above, the hose clamp support member 31 has a substantially rectangular parallelepiped shape that encloses the hose clamp member 22, and includes the front and rear left and right peripheral wall portions 34 and the upper and lower surface edge portions 35. The inner and outer dimensions of the hose clamp support member 31 are set larger than the outer dimensions of the hose clamp member 22 in the front and rear, left and right, and upper and lower dimensions. In this case, the hose clamp member 22 can behave freely such as moving and rotating in the front-rear, left-right, and up-down directions.

The hose clamp support member 31 has an opening 36 for passing the attachment hose 12 held by the hose clamp member 22 on the upper and lower surfaces thereof, and the opening 36 is formed by an edge 35. Since the edge portion 35 is a plate-like member extending inwardly from the upper end 34a and the lower end 34b of the peripheral wall portion 34, the opening 36 formed by the edge portion 35 is substantially rectangular. The front and rear and left and right dimensions of the opening 36 are set to be smaller than the front and rear and left and right dimensions of the hose clamp member 22, so that the hose clamp member 22 cannot come out of the hose clamp support member 31. Yes.

Since the width dimension G of the edge portion 35 is set smaller than the dimensions H1 and H2 from the front, rear, left and right surfaces of the hose clamp member 22 to the attachment hose insertion hole 24 of the hose clamp member 22, the hose clamp member 22 is hose clamped. The attachment hose 12 and the hose clamp support member 31 do not come into contact with each other even when they contact the peripheral wall portion 34 of the support member 31.

A groove 39 is formed by the peripheral wall portion 34, the lower edge portion 35 b, and the wall portion 38 that is substantially parallel to the peripheral wall portion 34 upward from the end portion 37 of the lower opening. A notch 40 is provided in a part of the groove 39, and a guide hose 41 communicating from the notch 40 through the through hole provided in the main frame 5 to the outside of the excavator 1 is attached (FIG. 1). By doing so, rainwater and mud that have entered from the gap between the hose clamp member 22 and the hose clamp support member 31 can be received by the groove and effectively discharged to the outside of the machine body by the guide hose 41. It is possible to prevent equipment such as the control valve 10 from being contaminated.

Further, with respect to the main body member 32 and the lid member 33 constituting the hose clamp support member 31, the lid member 33 is attached to the left side of the main body member 32, and the heights of these members are substantially the same. About the dimension of the front-back direction of the cover member 33, it has the protrusion part 42 which protruded ahead rather than the front peripheral wall part 34a of the hose clamp support member 31, and protruded back rather than the rear peripheral wall part 34b. Bolt insertion holes 44 for fastening the vertical plate 6 to the vertical plate 6 with bolts 43 are provided in the projecting portion 42 on the front and rear sides respectively.

Similarly to the cover member 33, the main body member 32 is also formed with a protrusion 45 that faces the front and rear protrusions 42 of the cover member 33 from the left ends of the front peripheral wall portion 34 a and the rear peripheral wall portion 34 b. A bolt insertion hole 46 for attachment to the plate 6 is provided at a position coincident with the bolt insertion hole 44 of the lid member 33.

Further, as described above, in order to make the hose clamp member 22 detachable from the hose clamp support member 31, the upper edge portion 35a, the lower edge portion 35b, and the wall portion 38 are formed on the left side. 33 and is separable from the main body member 32.

Further, the upper surface of the hose clamp support member 31 fixed to the vertical plate 6 and the upper surface of the guard 11 covering the hydraulic control valve 10 are attached so as to be substantially the same surface. There is a gap between them with rubber or trim.

(Other embodiments)
The above embodiment is only an example, and other embodiments will be exemplified below.

The working machine attached to the tip of the attachment 4 is not limited to the bucket 4c. Further, as long as it is necessary to follow the rotation of the attachment 4, it can be appropriately used not only for the hydraulic hose but also for an electric cable or the like.

The attachment hose 12 routed from the hydraulic control valve 10 to the hydraulic cylinder 9 may be a single hose or a divided hose, and a steel pipe may be used depending on the location.

The lid member 33 that forms the hose clamp support member 31 may be omitted, and the hose clamp member 22 may be attached so as to contact the vertical plate 6.

Even if the edge 35 of the hose clamp support member 31 is not formed on all four sides of the front, rear, left and right, the configuration of only one side may be used as long as the hose clamp member 22 does not come out of the hose clamp support member 31.

The shape of the hose clamp member 22 is not limited to the rectangular parallelepiped shape illustrated in FIG. 1, but can be freely set according to the surrounding layout such as a polygonal column or a sphere.

In FIG. 6, the attachment hose 12 in the axial direction at the clamp position A has a substantially vertical configuration, but the hydraulic control valve 10 is in front of or behind the attachment position of the attachment 4. For example, the hose clamp structure 21 may be attached with an inclination in consideration of the cableability from the hydraulic control valve 10 to the hose clamp structure 21.

Since the hose clamp support member 31 may not be attached to the vertical plate 6 due to the addition of optional equipment, etc., it may be possible to set a separate attachment member such as a bracket for attaching the hose clamp support member 31 in that case. It is done.

Regarding the configuration of the groove 39 formed in the hose clamp support member 31, the wall portion 38 does not need to be parallel to the peripheral wall portion 34, and the lower side edge portion of the hose clamp support member 31 without setting the wall portion 38 separately. 35 may be inclined toward the inside of the hose clamp support member 31. What is necessary is just to provide the function as a groove | channel at least.

The hose clamp structure 21 is not only for fixing the attachment hose 12 from the hydraulic control valve 10 to the boom 4a, but also for the hydraulic hose such as the pivot position of the boom 4a and arm 4b and the tilt position of the offset attachment. It can be used at a site where may behave.

DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 2 Lower traveling body 3 Upper revolving body 4 Attachment 9 Hydraulic cylinder 10 Hydraulic control valve 12 Attachment hose 21 Hose clamp structure 22 Hose clamp member 29 Elastic member 31 Hose clamp support member 34 Peripheral wall 35 Edge 35b Lower edge 36 Opening 37 Lower opening 38 End 38 Wall 39 Groove 40 Notch 41 Guide hose

Claims (5)

A lower traveling body, an upper swing body, an attachment pivotably attached to the upper swing body, a hydraulic cylinder provided in the attachment for operating the attachment, and a hydraulic pressure mounted on the upper swing body A control valve, a plurality of hydraulic hoses connected from the hydraulic cylinder to the hydraulic control valve, and an attachment hose connected to the hydraulic cylinder of the hydraulic hoses in the vicinity of the rotation support portion of the attachment. In construction machines with hose clamps that keep the axial direction aligned in the same direction,
The hose clamp is
A hose clamp member and a hose clamp support member,
The attachment hose is held by the hose clamp member,
The hose clamp support member is fixed to the upper swing body and includes the hose clamp member, and a peripheral wall portion that limits a movement range of the hose clamp member with respect to a direction orthogonal to an axial direction of the attachment hose, and the attachment The hose clamp member includes at least two edges that limit the movement range of the hose clamp member with respect to the axial direction of the hose and openings that are surrounded by the edge and through which the attachment hose is inserted. In the space surrounded by the edge portion, the attachment hose is loosely fitted so as to be movable in at least one axial direction of the attachment hose and in a direction perpendicular to the axis, and the opening is smaller than the contact surface of the opposing hose clamp member. The attachment hose has a certain distance from the edge when the hose clamp member is in contact with the peripheral wall. Clamp structure of the attachment hose, characterized in that that example. In claim 1,
An elastic member is provided in a space in which the hose clamp member can move with respect to the hose clamp support member, and the elastic member is attached to one or both of the hose clamp member and the hose clamp support member. Attachment hose clamp structure. In claim 2,
A wall portion extending upward from the end of the lower opening of the hose clamp support member with the end as a lower end, and the upper end of the wall is the hose clamp in the axial direction of the attachment hose An attachment hose clamp structure, wherein a movement range of the member is limited and a groove shape is formed by the peripheral wall portion, the lower edge portion, and the wall portion of the hose clamp support member. In claim 3,
A clamp structure for an attachment hose, wherein a notch is provided at least in the lower edge portion of the peripheral wall portion, the lower edge portion, and the wall portion forming the groove shape. In claim 4,
A clamp structure for an attachment hose, wherein the notch is covered with one end of a guide hose, the other end of the guide hose is led out of the upper rotating body, and the groove communicates with the outside of the hydraulic excavator. .

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