JP2010230121A - Lever lock device of rotary valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lever lock device of a rotary valve capable of keeping the rotary valve in a selected and desired operation pattern even if an external force is erroneously applied to a lever. <P>SOLUTION: The lever lock device is attached to the rotary valve 1 having first-fourth operation pattern selection positions P1-P4 formed along a circumferential direction of an end face 1b1 of a rotary spool 1b to allow the supply of pressure oil to a hydraulic actuator when the corresponding operation pattern selection position is selected. The lever lock device includes a lock means rotatably disposed along an end face 1b1 of the rotary valve 1, sets a predetermined position locking a lever 3 which can select one operation pattern selection position out of the first-fourth operation pattern selection positions P1-P4 to be located at each of operation pattern selection positions of the first-fourth operation pattern selection positions P1-P4, and locks the lever 3 so as not to be rotated at the corresponding operation pattern selection positions. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a rotary valve lever locking device that locks a rotary valve lever formed with a plurality of operation pattern selection positions at a predetermined position.

  There exists a thing shown by patent document 1 as this type of prior art. This prior art is an operation type switching valve provided in an anti-theft device of a hydraulic excavator, that is, a lever lock device of a rotary valve, and the rotary valve is adapted to the operation methods of a plurality of companies having different operation methods. A plurality of operation pattern selection positions are formed along the circumferential direction of the end face. By rotating the lever of this rotary valve to one of the plurality of operation pattern selection positions described above, it becomes possible to supply pressure oil to the hydraulic actuator according to the corresponding operation pattern. The hydraulic excavator can be driven by the operation of the actuator.

  Moreover, although this prior art is for theft prevention, it is the structure provided with the cylinder lock which locks a lever in a predetermined position. That is, when the hydraulic excavator is not driven, it is rotated to the end face portion of the rotary valve located between the adjacent operation pattern selection positions so that the supply of pressure oil to the hydraulic actuator that drives the hydraulic excavator becomes impossible. A configuration is disclosed in which the lever is locked with a cylinder lock at that position.

JP 2003-278187 A

  Although the above-described conventional technology includes a cylinder lock that locks the lever, the hydraulic actuator cannot be operated when the lever is locked by the cylinder lock. Therefore, when pressure oil is supplied to the hydraulic actuator to drive the hydraulic excavator, a complicated operation for unlocking the cylinder lock and rotating the lever to a predetermined operation pattern selection position is required. In this prior art, the excavator can be driven by a desired operation pattern by rotating the lever to a predetermined operation pattern selection position. However, in this state, the lever is not locked, When some external force is applied to the lever, there is a concern that the supply of pressure oil to the hydraulic actuator may become impossible or the operation pattern may be changed to an undesired operation pattern.

  The present invention has been made from the above-described prior art, and its purpose is to be able to hold a rotary valve in a selected desired operation pattern even when an external force is accidentally applied to the lever. It is in providing a lever lock device.

  In order to achieve this object, the rotary valve lever locking device according to the present invention is configured such that a plurality of operation pattern selection positions are formed along the circumferential direction of the end face, and when the corresponding operation pattern selection position is selected, the hydraulic actuator It is attached to a rotary valve that enables supply of pressure oil to the rotary valve, and is provided so as to be rotatable along the end face of the rotary valve, and selects one of the plurality of operation pattern selection positions. In a rotary valve lever locking device that locks a possible lever at a predetermined position, the predetermined position is set to an operation pattern selection position of each of the plurality of operation pattern selection positions, and among the plurality of operation pattern selection positions, The angle formed by the adjacent operation pattern selection positions is set to a predetermined angle, and the lever is Lock means for locking each of the operation pattern selection positions so as not to rotate is provided, and the lock means is located on the opposite side of the lever arranged at the operation pattern selection position with respect to the rotation fulcrum of the lever. A female screw formed on the end surface portion of the rotary valve, a base plate disposed so as to be opposed to the end surface of the rotary valve, and a base plate that is connected to the base plate and has the predetermined angle from 180 ° to each other. A first projecting plate composed of a first plate portion and a second plate portion formed in a “h” shape at an angular interval drawn, and is positioned on the opposite side of the first projecting plate with respect to the rotation fulcrum. A first fixed bracket provided continuously with the base plate portion, extending in a direction approaching the end face of the rotary valve, and having a second projecting plate having an insertion hole into which the lever is inserted; Male And a second fixing bracket having the male screw attached thereto and having the first plate portion of the first protruding plate of the first fixing bracket or the plate portion selectively fixed to the second plate portion; It is characterized by including.

  The present invention configured as described above is selected even when an external force is accidentally applied to the lever by locking the lever in a non-rotatable state by the locking means at the operation pattern selection position selected by the rotation of the lever. The rotary valve can be held in the desired operation pattern. In addition, the male screw of the second fixing bracket is screwed into the female screw formed on the end surface portion of the rotary valve, and the lever is inserted into the insertion hole of the second protruding plate of the first fixing bracket. By fixing, for example, the first plate portion of the first plate portion and the second plate portion to the plate portion of the second fixing bracket, the lever is locked, and the hydraulic actuator can be operated according to a desired operation pattern. Further, as described above, with the lever inserted into the insertion hole of the second protruding plate of the first fixed bracket, the lever is rotated so that the second plate portion of the first protruding plate becomes the plate portion of the second fixed bracket. By fixing, the lever is locked at another adjacent operation pattern selection position, and the hydraulic actuator can be operated by the other operation pattern. That is, the lever can be locked at one operation pattern selection position and another operation pattern selection position adjacent to this operation pattern selection position, and the hydraulic actuator can be operated according to the desired operation pattern.

  In the rotary valve lever locking device according to the present invention, in the above invention, the internal thread of the end face of the rotary valve is at the start end of the plurality of operation pattern selection positions with respect to the pivot fulcrum of the lever. The plurality of operation pattern selection positions with respect to the first female screw formed on the end surface portion of the rotary valve located on the opposite side of the lever disposed at the operation pattern selection position and the rotation fulcrum of the lever And a second female screw formed on an end surface portion of the rotary valve located on the opposite side of the lever, which is disposed at the terminal side operation pattern selection position, and the second protruding plate of the first fixing bracket. Consists of a third plate portion and a fourth plate portion that are formed in a “h” shape at an angular interval obtained by subtracting the predetermined angle from 180 °. Each of the fourth plate portion is characterized by having an insertion hole in which the lever is inserted.

  In the present invention configured as described above, the male screw of the second fixing bracket is screwed into the first female screw formed on the end surface portion of the rotary valve, and the second protruding plate of the first fixing bracket, for example, the third plate portion is inserted. With the lever inserted in the hole, for example, by fixing the first plate portion of the first protruding plate and the second plate portion of the first fixed bracket to the plate portion of the second fixed bracket, The lever is locked at one operation pattern selection position, that is, the first operation pattern selection position on the start end side, and the hydraulic actuator can be operated by the first operation pattern. Further, as described above, the male screw of the second fixed bracket is screwed into the first female screw, and the lever is rotated with the lever inserted into the insertion hole of the third plate portion of the second protruding plate of the first fixed bracket. Then, by fixing the second plate portion of the first protruding plate to the plate portion of the second fixing bracket, the lever is locked to another adjacent operation pattern selection position, that is, the second operation pattern selection position, and the second operation The hydraulic actuator can be operated by the pattern.

  The male screw of the second fixed bracket is screwed into the second female screw formed on the end surface portion of the rotary valve, and the lever is inserted into the insertion hole of the fourth plate portion of the second protruding plate of the first fixed bracket. For example, by fixing the first plate portion of the first protrusion of the first fixed bracket to the plate portion of the second fixed bracket, another operation pattern selection position adjacent to the second operation pattern selection position described above, that is, the first The lever is locked at the three operation pattern selection position, and the hydraulic actuator can be operated by the third operation pattern. Further, as described above, the male screw of the second fixed bracket is screwed into the second female screw, and the lever is rotated with the lever inserted into the insertion hole of the fourth plate portion of the second protruding plate of the first fixed bracket. By fixing the second plate portion of the first projecting plate to the plate portion of the second fixing bracket, the lever is locked to another adjacent operation pattern selection position, that is, the fourth operation pattern selection position on the end side. The hydraulic actuator can be operated by the fourth operation pattern. Therefore, according to the present invention, the lever is locked at each of the four operation pattern selection positions, and the hydraulic actuator can be operated according to any one of the first to fourth operation patterns.

  In the rotary valve lever locking device according to the present invention, in the above invention, the first projecting plate of the first fixing bracket is extended in a direction away from the end face of the rotary valve. The second projecting plate of the first fixed bracket is characterized in that it is in contact with the end face of the rotary valve.

  In the present invention configured as described above, since the first protruding plate of the first fixed bracket extends in a direction away from the end face of the rotary valve, the first protruding plate of the first fixed bracket and the plate portion of the second fixed bracket. The fixing work can be performed at the outer portion of the base plate which can secure a relatively wide working space, and this fixing work is easy. Moreover, since the 2nd protrusion part of a 1st fixing bracket is contact | abutting to the end surface of a rotary valve, a 1st fixing bracket and a 2nd fixing bracket can be maintained in the stable fixed form.

  In the rotary valve lever locking device according to the present invention, in the above invention, each of the first plate portion and the second plate portion of the first protruding plate of the first fixed bracket has a bolt hole, The plate portion of the second fixing bracket has a bolt hole that can be fitted to each bolt hole of the first plate portion and the second plate portion of the first protruding plate.

  In the present invention configured as described above, the bolt hole of the first plate part or the bolt hole of the second plate part that forms the first protruding plate of the first fixed bracket, and the bolt hole of the plate part of the second fixed bracket are bolts. By inserting, the first fixing bracket and the second fixing bracket can be securely fixed.

  The present invention is provided with locking means for locking the lever so that it cannot rotate at the corresponding operation pattern selection position among the plurality of operation pattern selection positions, so that even if an external force is accidentally applied to the lever, the selection can be made. Therefore, the rotary valve can be held in a desired operation pattern, and therefore, it is impossible to supply pressure oil to the hydraulic actuator due to an external force applied to the lever by mistake, which has been a concern in the past, or a change to an undesired operation pattern. Can be prevented, and stable operation of the hydraulic actuator can be realized.

It is a perspective view showing one embodiment of the lever lock device of the rotary valve concerning the present invention. It is a figure which shows the state which remove | excluded the 1st fixing bracket, the 2nd fixing bracket, and the attachment bracket from the state shown in FIG. 1, (a) A figure is a front view, (b) A figure is a side view. It is a perspective view showing the 1st fixed bracket with which the lever locking device concerning this embodiment is equipped. It is a perspective view showing the 2nd fixed bracket with which the lever lock device concerning this embodiment is equipped. It is a figure explaining the lever lock operation in this embodiment, and is a front view showing the state where a lever is fixed to the 1st operation pattern selection position which is the starting end side. It is a figure explaining the lever lock operation in this embodiment, and is a front view showing the state where a lever is fixed to the 2nd operation pattern selection position. It is a figure explaining the lever lock operation in this embodiment, and is a front view showing the state where a lever is fixed to the 3rd operation pattern selection position. It is a figure explaining the lever lock operation in this embodiment, and is a front view showing the state where a lever is fixed to the 4th operation pattern selection position which is a termination side.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an embodiment of a lever lock device for a rotary valve according to the present invention. FIG. 2 shows a state in which the first fixing bracket, the second fixing bracket, and the mounting bracket are removed from the state shown in FIG. FIG. 3A is a front view, FIG. 3B is a side view, FIG. 3 is a perspective view showing a first fixing bracket provided in the lever lock device according to the present embodiment, and FIG. 4 is according to the present embodiment. It is a perspective view which shows the 2nd fixing bracket with which a lever lock apparatus is equipped.

  One embodiment of a lever lock device for a rotary valve according to the present invention is provided in a construction machine such as a hydraulic excavator (not shown). This hydraulic excavator includes a traveling body, a revolving body disposed on the traveling body, and a front work machine attached to the revolving body so as to be rotatable in the vertical direction. In addition, a travel motor that drives the travel body, a swing motor that drives the swing body, and various hydraulic actuators such as a boom cylinder and an arm cylinder that drive the front work machine are provided.

  The rotary valve 1 shown in FIG. 1 to which the lever locking device according to this embodiment is attached corresponds to operation patterns of a plurality of companies having different operation methods, for example, four companies of K company, H company, M company, and Y company. A casing 1a and a rotary pool 1b that is rotatably accommodated in the casing 1a are provided. A plurality of connection ports 1a1 to which a pilot hose is connected are formed on the outer peripheral surface of the casing 1a.

  As shown in FIG. 2A, on the end surface 1b1 of the rotary pool 1b of the rotary valve 1, four operation patterns are selected along the circumferential direction of the end surface 1b1 in correspondence with the operation patterns of the four companies described above. Positions P1 to P4 are formed. For example, a first operation pattern selection position P1 corresponding to the operation pattern of Company K is formed on the start end side, and a second operation pattern selection position P2 corresponding to Company H is formed adjacent to the first operation pattern selection position P1. Then, a third operation pattern selection position P3 corresponding to the M company is formed adjacent to the second operation pattern selection position P2, and the terminal side of the terminal side corresponding to the Y company is adjacent to the third operation pattern selection position P3. A fourth operation pattern selection position P4 is formed.

  As shown in FIGS. 1 and 2, the lever 3 is integrally provided on the end surface 1 b 1 of the rotary pool 1 b of the rotary valve 1. The angle formed by the adjacent operation pattern selection positions among the four operation pattern selection positions P1 to P4 described above about the rotation fulcrum 2 of the lever 3 is set to a predetermined angle, for example, 45 °. That is, the angle formed by the first operation pattern selection position P1 and the second operation pattern selection position P2 is 45 °, and the angle formed by the second operation pattern selection position P2 and the third operation pattern selection position P3 is 45 °. The angle formed by the third operation pattern selection position P3 and the fourth operation pattern selection position P4 is also 45 °.

  The lever locking device according to the present embodiment includes a locking unit that locks the lever 3 at the corresponding operation pattern selection position among the four operation pattern selection positions P1 to P4 so as not to rotate.

  As shown in FIG. 2 (a), the locking means is configured such that the lever 3 disposed at the operation pattern selection position, for example, the first operation pattern selection position P1 on the start end side with respect to the rotation fulcrum 2 of the lever 3. The first female screw 15 formed on the end face 1b1 portion of the rotary pool 1b of the rotary valve 1 located on the opposite side of the rotary valve 1 and the rotary located on the opposite side of the lever 3 arranged at the fourth operation pattern selection position P4 on the terminal side. And a second female screw 16 formed on the end surface 1b1 portion of the spool 1b.

  As shown in FIGS. 1 and 3, the locking means is provided so as to be spaced apart from the end surface 1b1 of the rotary pool 1b and connected to the base plate 5, for example, the rotary pool 1b. The end face of the rotary pool 1b is connected to the first projecting plate 6 extending in a direction away from the end surface 1b1 and the base plate 5 located on the opposite side of the first projecting plate 6 with respect to the rotation fulcrum 2. It includes a first fixed bracket 4 that extends in a direction approaching 1b1 and has, for example, a second projecting portion 9 that contacts the end surface 1b1.

  The first protruding plate 6 of the first fixed bracket 4 has a first plate portion 7 formed in a “h” shape at an angle interval of 135 °, which is obtained by subtracting the aforementioned predetermined angle, that is, 45 ° from 180 °. It consists of the second plate part 8. Bolt holes 7 a are formed in the first plate portion 7, and bolt holes 8 a are formed in the second plate portion 8.

  Further, the second projecting plate 9 of the first fixed bracket 4 is also formed in the shape of a letter “H” at an angular interval of 135 ° obtained by subtracting the above-mentioned predetermined angle, that is, 45 ° from 180 °. 10 and the fourth plate part 11. The third plate portion 10 is formed with an insertion hole 10a into which the lever 3 is inserted, and the fourth plate portion 11 is formed with an insertion hole 11a into which the lever 3 is inserted.

  As shown in FIGS. 1 and 4, the locking means is provided with a male screw 13 and a male screw 13 which are respectively engaged with the first female screw 15 and the second female screw 16 provided on the end surface 1b1 of the rotary pool 1b. And the second fixed bracket 12 having the first plate portion 7 of the first protruding plate 6 of the first fixed bracket 4 or the plate portion 14 that is selectively fixed to the second plate portion 8. .

  The plate portion 14 of the second fixed bracket 12 can be adapted to the bolt hole 7a of the first plate portion 7 of the first protruding plate 6 of the first fixed bracket 4 and the bolt hole 8a of the second plate portion 8 described above. It has a bolt hole 14a.

  In the present embodiment, as shown in FIG. 2A, bolt holes 17 and 18 are formed in the end surface 1b1 of the rotary pool 1b to which the lever 3 is attached. Moreover, as shown in FIG. 1, the mounting bracket 19 which has the bolt holes 19a and 19b which fit these bolt holes 17 and 18 is provided. Bolt holes similar to the bolt holes 17 and 18 described above are formed on the other end face of the rotary pool 1b to which the lever 3 is not attached. Moreover, the mounting placket 20 which has the bolt hole which fits those bolt holes is provided. With the pair of mounting brackets 19 and 20, the rotary valve 1 is attached to a predetermined portion of a member constituting the hydraulic excavator.

  5 to 8 are diagrams for explaining the lever lock operation in the present embodiment. FIG. 5 is a front view showing a state in which the lever is fixed at the first operation pattern selection position on the start end side. FIG. FIG. 7 is a front view showing a state in which the lever is fixed at the third operation pattern selection position, and FIG. 8 is a fourth operation pattern selection position in which the lever is at the end side. It is a front view which shows the state fixed to.

  In this embodiment configured as described above, for example, when the lever 3 is positioned at the first operation pattern selection position P1 and the rotary valve 1 is to be switched to the operation pattern of the K company, as shown in FIG. The male screw 13 of the second fixing bracket 12 is screwed into the first female screw 15 formed on the end surface 1b1 portion of the rotary pool 1b of the rotary valve 1, and the third plate portion 10 of the second protruding plate 9 of the first fixing bracket 4 is engaged. With the lever 3 inserted into the insertion hole 10a, the bolt hole 7a of the first plate portion 7 of the first protruding plate 6 of the first fixed bracket 4 and the bolt hole 14a of the plate portion 14 of the second fixed bracket 12 are connected. The bolts 7a and 14a are fitted and bolts (not shown) are inserted, and nuts (not shown) screwed into the bolts are tightened to fix the first plate part 7 and the plate part 14 of the first projecting plate 6 to each other. That. As a result, as shown in FIG. 5, the lever 3 is locked at the first operation pattern selection position P1 on the start side, and the hydraulic actuator (not shown) can be operated by the operation pattern of the K company. It is possible to realize driving of a hydraulic excavator (not shown) accompanying the operation.

  Further, for example, when the lever 3 is positioned at the second operation pattern selection position P2 and the rotary valve 1 is switched to the operation pattern of Company H, as shown in FIG. 6, the rotary pool 1b of the rotary valve 1 is changed. The male screw 13 of the second fixing bracket 12 is screwed into the first female screw 15 formed on the end surface 1b1 portion, and the lever 3 is inserted into the insertion hole 10a of the third plate portion 10 of the second protruding plate 9 of the first fixing bracket 4. In the inserted state, the bolt holes 8a of the second plate portion 8 of the second protruding plate 8 of the first fixed bracket 4 and the bolt holes 14a of the plate portion 14 of the second fixed bracket 12 are matched, and these bolt holes 8a. Then, a bolt (not shown) is inserted into the bolt hole 14a, and a nut (not shown) screwed into the bolt is tightened to fix the second plate portion 8 and the plate portion 14 of the first protruding plate 6. As a result, as shown in FIG. 6, the lever 3 is locked at the second operation pattern selection position P2 adjacent to the first operation pattern selection position P1, and the hydraulic actuator (not shown) can be operated by the operation pattern of the H company. Thus, it is possible to realize driving of a hydraulic excavator (not shown) accompanying the operation of the hydraulic actuator.

  Further, for example, when the lever 3 is positioned at the third operation pattern selection position P3 and the rotary valve 1 is switched to the operation pattern of the M company, the rotary pool 1b of the rotary valve 1 is switched as shown in FIG. The male screw 13 of the second fixing bracket 12 is screwed into the second female screw 16 formed on the end surface 1b1 portion, and the lever 3 is inserted into the insertion hole 11a of the fourth plate portion 11 of the second protruding plate 9 of the first fixing bracket 4. In the inserted state, the bolt holes 7a of the first plate portion 7 of the first protruding plate 6 of the first fixed bracket 4 and the bolt holes 14a of the plate portion 14 of the second fixed bracket 12 are matched, and these bolt holes 7a. A bolt (not shown) is inserted into the bolt hole 14a, and a nut (not shown) screwed into the bolt is tightened to fix the first plate portion 7 and the plate portion 14 of the first protruding plate 6 to each other. As a result, as shown in FIG. 7, the lever 3 is locked to the third operation pattern selection position P3 adjacent to the second operation pattern selection position P2, and the hydraulic actuator (not shown) can be operated by the operation pattern of the M company. Thus, it is possible to realize driving of a hydraulic excavator (not shown) accompanying the operation of the hydraulic actuator.

  Further, for example, when the lever 3 is positioned at the fourth operation pattern selection position P4 and the rotary valve 1 is switched to the operation pattern of the company Y, as shown in FIG. 8, the rotary pool 1b of the rotary valve 1 is changed. The male screw 13 of the second fixing bracket 12 is screwed into the second female screw 16 formed on the end surface 1b1 portion, and the lever 3 is inserted into the insertion hole 11a of the fourth plate portion 11 of the second protruding plate 9 of the first fixing bracket 4. In the inserted state, the bolt holes 8a of the first plate portion 8 of the first projecting plate 6 of the first fixed bracket 4 and the bolt holes 14a of the plate portion 14 of the second fixed bracket 12 are matched, and these bolt holes 8a. Then, a bolt (not shown) is inserted into the bolt hole 14a, and a nut (not shown) screwed into the bolt is tightened to fix the second plate portion 8 and the plate portion 14 of the first protruding plate 6. As a result, as shown in FIG. 8, the lever 3 is locked to the fourth operation pattern selection position P4 on the terminal side adjacent to the second operation pattern selection position P3, and the hydraulic actuator (not shown) is operated by the operation pattern of the Y company. Thus, it is possible to realize the driving of a hydraulic excavator (not shown) accompanying the operation of the hydraulic actuator.

  According to this embodiment configured as described above, at any one of the operation pattern selection positions P1 to P4 selected by the rotation of the lever 3, the first female screw 15, the second female screw 16, Even if an external force is accidentally applied to the lever 3 by locking the lever 3 with the locking means including the first fixing bracket 4 and the second fixing bracket 12 so that the lever 3 cannot be rotated, the selected desired operation pattern is obtained. The rotary valve 1 can be held. Accordingly, it is possible to prevent pressure oil from being supplied to the hydraulic actuator due to an external force erroneously applied to the lever 3, or to change to an undesired operation pattern, thereby realizing stable operation of the hydraulic actuator.

  Further, since the first protruding plate 6 of the first fixed bracket 4 extends in a direction away from the end surface 1 b 1 of the rotary pool 1 b of the rotary valve 1, the first protruding plate 6 of the first fixed bracket 4. And the plate portion 14 of the second fixing bracket 12 can be fixed at the outer portion of the base plate 5 (above the end surface 1b1 in the state shown in FIGS. 5 to 8) that can ensure a relatively wide working space. This fixing work is easy. Moreover, since the 2nd protrusion board 9 of the 1st fixing bracket 4 is contact | abutting to the end surface 1b1 of the rotary pool 1b, the 1st fixing bracket 4 and the 2nd fixing bracket 12 can be maintained in the stable fixed form.

  Further, the bolt hole 14 a of the plate portion 14 of the second fixed bracket 12 is formed in the bolt hole 7 a of the first plate portion 7 or the bolt hole 8 a of the second plate portion 8 that forms the first protruding plate 6 of the first fixed bracket 4. By fitting and inserting bolts into these bolt holes 7a and bolt holes 14a, or bolt holes 8a and bolt holes 14, respectively, the above-described first fixing bracket 4 and second fixing bracket 12 are connected. A stable fixed form can be realized.

  Moreover, as shown in FIGS. 5-8 etc., the locking means with which this embodiment is provided can be provided in the area | region of the end surface 1b1 of the rotary pool 1b of the rotary valve 1. FIG. Thereby, as shown in FIG. 2B, the rotary valve 1 can be disposed without affecting the height dimension when it is disposed horizontally.

  In the above embodiment, the first protruding plate 6 of the first fixed bracket 4 is provided so as to extend in a direction away from the end surface 1b1 of the rotary pool 1b of the rotary valve 1. When the length dimension can be secured sufficiently long, the first protruding plate 6 may be provided so as to extend in a direction approaching the end surface 1b1 of the rotary pool 1b.

  Moreover, in the said embodiment, although the 1st protrusion plate 9 of the 1st fixing bracket 4 consists of what contact | abuts to the end surface 1b1 of the rotary pool 1b, fixation of the 1st fixing bracket 4 and the 2nd fixing bracket 12 is carried out. When sufficient strength can be secured, the length of the second protruding plate 6 is set so that the lower end of the second protruding plate 6 of the first fixed bracket 4 is separated from the end surface 1b1 of the rotary pool 1b. May be.

  In the above embodiment, the rotary valve 1 has the first to fourth operation patterns P1 to P4 in consideration of the operation patterns unique to each of the four companies. Thus, the present invention is not limited to being applied to the rotary valve 1 having the first to fourth operation pattern selection positions P1 to P4. For example, the fourth operation pattern selection position P4 is removed from the first to fourth operation pattern selection positions P1 to P4, and the lever lock device of the present embodiment is applied to the rotary valve 1 that can handle three different companies with different operation patterns. Alternatively, the rotary valve 1 may be provided so that the third operation pattern selection position P3 and the fourth layer pattern selection position P4 can be removed and the operation patterns can correspond to two different companies.

  As described above, when the rotary valve 1 that can be used by two companies having the first operation pattern selection position P1 and the second operation pattern selection position P2 is provided, the second female screw 16 included in the lock means is not provided. In addition, the second projecting plate 9 of the first fixing bracket 4 may be configured by only the third plate portion 10.

DESCRIPTION OF SYMBOLS 1 Rotary valve 1b Rotary pool 1b1 End surface 2 Rotation fulcrum 3 Lever 4 1st fixed bracket 5 Base plate 6 1st protrusion plate 7 1st plate part 7a Bolt hole 8 2nd plate part 8a Bolt hole 9 2nd protrusion plate 10 1st 3 plate portion 10a insertion hole 11 fourth plate portion 11a insertion hole 12 second fixing bracket 13 male screw 14 plate portion 14a bolt hole 15 first male screw 16 second male screw 17 bolt hole 18 bolt hole

Claims (4)

A plurality of operation pattern selection positions are formed along the circumferential direction of the end face. When a corresponding operation pattern selection position is selected, the operation pattern selection position is attached to a rotary valve that enables supply of pressure oil to the hydraulic actuator. In a rotary valve lever locking device, which is provided so as to be rotatable along an end face and locks a lever capable of selecting one of the plurality of operation pattern selection positions at a predetermined position.
The predetermined position is set to each operation pattern selection position of the plurality of operation pattern selection positions,
The angle formed by the adjacent operation pattern selection positions among the plurality of operation pattern selection positions is set to a predetermined angle,
Locking means for locking the lever at the corresponding operation pattern selection position so as not to rotate is provided.
A female screw formed on the end face portion of the rotary valve located on the opposite side of the lever arranged at the operation pattern selection position with respect to the rotation fulcrum of the lever;
A base plate that is arranged so as to be opposed to the end face of the rotary valve, and a base plate that is connected to the base plate and is formed in a “h” shape at an angular interval obtained by subtracting the predetermined angle from 180 °. A first protruding plate composed of a first plate portion and a second plate portion, and a base plate portion located on the opposite side of the first protruding plate with respect to the rotation fulcrum, A first fixed bracket having a second protruding plate extending in a direction approaching the end face and having an insertion hole into which the lever is inserted;
A male screw that is screwed into the female screw, and a plate portion that is attached to the male screw and that is selectively fixed to the first plate portion or the second plate portion of the first protruding plate of the first fixing bracket. A rotary lock lever locking device comprising: a second fixed bracket having a rotary valve. In the lever lock device of the rotary valve according to claim 1,
The female screw on the end surface of the rotary valve is located on the opposite side of the lever disposed at the operation pattern selection position on the start end side of the plurality of operation pattern selection positions with respect to the pivot fulcrum of the lever. The first female screw formed on the end face portion of the rotary valve and the lever arranged at the terminal-side operation pattern selection position among the plurality of operation pattern selection positions with respect to the rotation fulcrum of the lever A second female screw formed on the end surface portion of the rotary valve located on the side,
The second projecting plate of the first fixed bracket is composed of a third plate portion and a fourth plate portion that are formed in a shape of “he” at an angular interval obtained by subtracting the predetermined angle from 180 °. Each of the third plate portion and the fourth plate portion has an insertion hole into which the lever is inserted. In the lever lock device of the rotary valve according to claim 1,
The first protruding plate of the first fixed bracket is formed by extending in a direction away from the end face of the rotary valve,
The rotary lock lever locking device according to claim 1, wherein the second protruding plate of the first fixed bracket is in contact with the end face of the rotary valve. In the lever lock device of the rotary valve according to claim 1,
Each of the first plate portion and the second plate portion of the first protruding plate of the first fixing bracket has a bolt hole,
The rotary valve lever, wherein the plate portion of the second fixed bracket has a bolt hole that can be fitted to each bolt hole of the first plate portion and the second plate portion of the first protruding plate. Locking device.

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