JP2012097443A - Armrest device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an armrest device which allows easy adjustment of the height of an armrest without inserting a hand or a tool to a narrow part.SOLUTION: The armrest device of a construction machine includes: a cylindrical guide body fixed to a vehicle body; a cylindrical column movably inserted to the guide body and provided with an armrest on the end; and locking means for locking the column at an arbitrary position of the guide body. The locking means includes: a plurality of locking parts provided in the axial direction of the guide body at an interval; one through-hole provided on a position corresponding to the locking part of the column; a locking member which passes through the through-hole and is locked to the locking part; an operation member housed movably in the axial direction in the column, and provided with a locking operation part for locking the locking member to the locking part through the through-hole by movement in one direction, and a locking release part for releasing the locking of the locking member and the locking part by movement in the other direction; and a shaft member connected to the operation member at one end and to a holding part at the other end, and extended in the axial direction of the column so that the holding part is projected from the column.

Description

  The present invention relates to an armrest device that is attached to a vehicle such as a construction machine and adjusts a position such as a height of an armrest.

  Construction machines are provided with cockpits for manipulating civil engineering / architectural working devices. The cockpit seat is configured to include a pilot seat on which a driver is seated, and a plurality of steering levers that are installed independently of the pilot seat and that steer the working device. In civil engineering / architecture work devices, there are many cases where the operation that requires fine operation of the control lever is often performed, and the operator operates the elbow by placing the elbow on the elbow rest provided in the control seat, It is possible to stably perform a delicate operation of the control lever. Further, the operator can relax the body by placing the elbow on the elbow rest of the control seat, and can reduce fatigue of the body (arms, back, etc.) even when working for a long time.

  In the construction machine, pilots with different physiques such as height and arm length may operate, and the height of the elbow rest can be adjusted so that the pilot can relax the body and place the elbow on the elbow rest It is like that. For example, as an elbow mount that can be adjusted in height, the console box is provided with a lever stand on which the console box is mounted, which is provided with a control lever on each of the left and right sides of the driver's seat. The armrests are fixed by fitting the support legs of the prismatic armrests to the prismatic brackets fixed to the brackets, passing the bolts through the bolt holes formed in the brackets and the support legs, and screwing the bolts and shaft pins together. There is one that adjusts the height of the armrest by appropriately selecting the bolt hole through which the bolt passes (Patent Document 1).

  An armrest body having an armrest provided on the head of the support and an armrest having a locking means for making the armrest body movable up and down and fixing it at an arbitrary position, the locking means being a console box A ratchet mechanism that engages a locking pin provided on a frame fixed to a plurality of notches formed in the support column, and the locking pin is rotatably disposed on the frame. In addition, some are configured to be disengaged from the notch by rotating (Patent Document 2).

  In such a control seat equipped with an armrest, the height of the armrest can be adjusted, so that the operator places the elbow on the armrest in a relaxed state regardless of the height, the length of the arm, etc. In addition to being able to easily perform detailed operations of the control lever, it is possible to reduce body fatigue even during long-time operations.

Japanese Utility Model Publication No. 6-35356 Japanese Patent Laid-Open No. 11-293702

  Usually, in the cockpit, many members are often arranged in a narrow space, and wall surfaces are often close to the back surface and both side surfaces of the cockpit. As described above, when the control seat and the wall surface are close to each other, an adjustment unit that adjusts the height is provided on the back surface of the column like the armrest described in Patent Document 1, or Patent Document In the case of the armrest described in item 2 provided on the side surface of the support column, since the periphery of the adjustment unit is narrow, it is difficult to insert a hand or a tool, and adjustment is difficult.

  In addition, after the operator has been seated on the control seat, when the operator notices that the height of the armrest and the height of the elbow of the operator are not high, or for civil engineering / architecture work using a self-propelled construction machine When the control lever is different from the control device for driving (such as a handle), the armrest is difficult to use or obstructs, so the operator often adjusts the armrest. When the adjusting portion for adjusting the height of the armrest is formed on a side surface or the back surface, the operator must operate the adjusting portion in an unreasonable posture by twisting the body. The burden increases. In order to reduce the burden on the pilot, there are a method of bringing the adjustment unit on the back side to the front side, and a method of arranging the adjustment unit on the outside of the side surface on the pilot side.

  However, the console box operation part is arranged on the front side of the armrest support, and it is difficult to arrange the adjusting part on the front of the support. In addition, when the adjustment unit is arranged on the driver side, the operator can easily adjust the adjustment unit, but when the operator removes the seat, equipment such as clothes and tools is provided. The possibility of being caught and malfunctioning increases.

  Then, an object of this invention is to provide the armrest apparatus which can adjust the height of an elbow rest easily, without putting a hand or a tool in a narrow part.

  In order to achieve the above object, the present invention provides a cylindrical guide body fixed to a vehicle body, a cylindrical support column that is movably inserted into the guide body and provided with an armrest at an end, and the support column. An armrest device for a construction machine having locking means for locking at an arbitrary position of the guide body, wherein the locking means includes a plurality of locking portions provided in the axial direction of the guide body at intervals. A through hole provided at a position corresponding to the locking portion of the support, a locking member that passes through the through hole and is locked to the locking portion, and an axial direction on the support A locking operation part that is movably accommodated and that locks the locking member to the locking part through the through hole when moved to one side, and an engagement between the locking member and the locking part when moved to the other side. An operation member having an unlocking portion for releasing the stop, and one end of the operation member. The member and the other end connected to the grip portion, the grip portion and having a shaft member extending in the axial direction of the strut so as to protrude from the post.

(1) By making the armrest device of the present invention an armrest device having the above-described configuration, it is possible to provide the gripping portion at a place where it can be easily operated. Therefore, it is easier to operate the gripping portion than the conventional armrest device, The armrest height adjustment work is easy.

(2) The armrest device according to the present invention is the above-described armrest device having a locking transition portion between the locking operation portion and the locking release portion, whereby the locking member is locked / released. Is done smoothly.

(3) The armrest device according to the present invention has an operation side detachment for preventing the locking member from being detached from the locking operation portion on the side opposite to the locking release portion of the locking operation portion. And a release-side detachment preventing portion that prevents the locking member from being detached from the locking release portion on the side opposite to the locking operation portion of the locking release portion. By using the above-described armrest device, the locking member is reliably locked and unlocked by the operation member.

(4) In the armrest device of the present invention, the operation member has a shaft insertion hole through which the shaft member can be moved in the axial direction, and the shaft member is inserted into the shaft insertion hole from the grip portion side. The engaging member that engages with the operating member is provided at a portion protruding from the operating member, and a coil spring is provided between the support column and the operating member so as to be coaxial with the shaft member. By using the armrest device, it is possible to absorb the dimensional variation of the component parts and to reliably operate the operation member.

It is the schematic of the armrest apparatus concerning this invention. It is a front view of the operation member concerning the present invention. It is a top view of the operation member shown in FIG. It is a bottom view of the operation member shown in FIG. It is a figure of the armrest apparatus of the state which canceled the latching of a guide body and a support | pillar. It is a figure of the state which lifted the support | pillar with the armrest.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of an armrest device according to the present invention. As shown in FIG. 1, the armrest device includes an armrest Ar, a guide body 1, a support 2, a locking member 3, an operation member 4, a grip portion 5, a shaft member 6, an engagement body 61, A clamp lock member 7 and a coil spring 8 are provided. In addition, the latching means is comprised by the latching | locking part 11 provided in the guide body 1, the through-hole 21 of the support | pillar 2, the latching member 3, the operation member 4, and the shaft member 6. FIG.

  The guide body 1 is a cylindrical member that is fixed so that one end portion protrudes upward from the vehicle body Mb. Four locking portions 11 formed side by side in the axial direction are formed on the side surface of the guide body 1. The locking portion 11 is a hole having a circular cross section, and is a hole having a diameter smaller than the outer diameter of the locking member 3. In addition, in the guide body 1, although the four latching | locking parts 11 arranged at equal intervals in the axial direction are illustrated, it is not limited to this. For example, statistics such as the height of the pilot and the length of the arm may be taken, and the interval may be narrowed at the most frequently used part, and the interval may be widened at the other parts. Moreover, although the latching | locking part 11 is a hole which has penetrated the guide body 1, it is not limited to this, For example, the members, such as a ring process, are fixed to the guide body 1, such as an extrusion process, By doing so, it is possible to widely use those formed with irregularities that can be locked by the locking member 3.

  A clamp lock member 7 is provided at the end of the guide body 1 opposite to the end fixed to the vehicle body Mb. The clamp lock member 7 includes a belt-like portion 71 surrounding the guide body 1 and a convex portion 72 protruding inward from the belt-like portion 71. The convex part 72 has a plane part parallel to the axis, and is fitted into the notch part 12 formed at the end part of the guide body 1. Although not shown in the figure, the belt-like portion 71 has an annular shape with a part open, and is provided with fastening portions formed at both ends so as to be parallel to each other. The fastening portion is provided with a shaft, and a head is formed so that one end of the shaft does not come off. A lever having an eccentric cam is provided at the other end of the shaft. Then, the eccentric cam is operated and the shaft is moved to bring the tightening portion close to each other, the tightening operation is performed, the column 2 is pressed by the convex portion 72, and the column 2 is fixed so as not to slide. The clamp lock member 7 is not limited to this configuration, and there is a wide range of fixing mechanisms that can be fixed so that the column 2 is not easily displaced in the axial direction when the operator places an elbow on the armrest Ar and applies force. Can be adopted.

  Inside the guide body 1, a cylindrical column 2 is disposed so as to be slidable in the axial direction. The support column 2 is a cylindrical member in which a curved surface portion 200 facing the inner surface of the guide body 1 and a flat surface portion 201 that is connected to the curved surface portion 200 and extends in the axial direction are connected. A through hole 21 provided at a position corresponding to the locking portion 11 of the guide body 1 is formed in the flat portion 201. The support column 2 is disposed inside the guide body 1 so that the flat surface portion 201 faces (contacts) the flat surface portion of the convex portion 72 of the clamp lock member 7. Thus, since the flat part 201 and the flat part of the convex part 72 face each other (contact), the support column 2 can be prevented from rotating around the axis with respect to the guide body 1. On the other hand, the position of the through hole 21 of the column 2 can be adjusted to the position of the desired locking portion 11 of the guide body 1 simply by sliding the column 2 in the axial direction. In addition, by the clamping operation of the clamp lock member 7, the flat portion of the convex portion 72 is pressed against the flat portion 201, and the clamp lock member 7 is fixed so that the column 2 does not move in the axial direction (is difficult to move).

  The locking member 3 is disposed in the through hole 21 of the column 2. The locking member 3 is a sphere, the inner diameter of the locking portion 11 is smaller than the outer diameter of the locking member 3, and the inner diameter of the through hole 21 is larger than the outer diameter of the locking member 3. That is, the locking member 3 can pass through the through hole 21, but the locking portion 11 cannot pass. Note that the locking member 3 is not limited to a spherical body. For example, when the support column 2 moves, the locking member 3 rotates in contact with the inside of the guide body 1 and can pass through the through hole 21 and pass through the locking portion 11. It may be a columnar rotating body with a size that cannot be achieved.

  In addition, an operation member 4 that operates the locking member 3, a coil spring 8 that biases the operation member 4 downward, and a spring that is inserted and fixed from the upper end of the column 2 and contacts the coil spring 8 inside the column 2. A presser portion 22 is disposed. The support column 2 is provided with a bracket 23 to which an armrest Ar is attached on the outer side of the upper end. The bracket 23 is fixed to the column 2, and the armrest Ar is fixed to the bracket 23. As a fixing method, a well-known fixing method using a binding member such as a rivet or a screw, or a fixing method such as welding can be employed. The mounting portion of the bracket 23 includes a portion that protrudes to the inside of the column 2, and by attaching the bracket 23, the movement of the spring pressing portion 22 in the axial direction is restricted by the protruding portion, and from the column 2 of the spring pressing portion 22. Is prevented from coming off. The spring retainer 22 includes a cylindrical spring guide 221 at the lower portion, and the spring retainer 22 surrounds the coil spring 8 in order to prevent the coil spring 8 from being bent or displaced. Further, when the operation member 4 moves upward, the spring guide portion 221 abuts on the operation member 4 and also serves as a restriction portion that restricts the movement of the operation member 4.

  Further, the grip portion 5 is disposed on the outer side of the support column 2 and on the upper portion of the spring pressing portion 22. The grip member 5 is fixed to one end of the shaft member 6. The grip 5 and the shaft member 6 may be fixed by screwing the male screw formed on the shaft member 6 and the grip 5 or may be fixed by adhesion or press-fitting. May be. When the grip portion 5 is pulled up, the grip portion 5 and the shaft member 6 can be fixed by a method that can be firmly fixed so as not to separate.

  The spring retainer 22 and the operation member 4 are formed with a slide hole 220 and a shaft insertion hole 40 through which the shaft member 6 slidably passes (see FIG. 2). The shaft member 6 passes through a sliding hole 220 formed in the spring retainer 22 and extending in the axial direction and a shaft insertion hole 40 formed in the operation member 4 and extending in the axial direction, and below the operation member 4 from the shaft insertion hole 40. The engaging body 61 is engaged with the protruding portion. The engaging body 61 is a member having a larger outer diameter than the sliding hole 220 and the shaft insertion hole 40, and the engaging body 61 engages with the operation member 4 when the grip portion 5 is pulled up and the shaft member 6 moves upward. Then, the engaging body 61 lifts the operating member 4.

  The coil spring 8 is disposed so as to surround the shaft member 6. The coil spring 8 has one end in contact with the spring retainer 22 and the other end in contact with the operation member 4. The coil spring 8 is compressed and attached in a contracted state, and the coil spring 8 pushes the operation member 4 downward by a restoring force that attempts to return to the original length.

  Next, the operation member 4 which is a main part of the present invention will be described with reference to the drawings. 2 is a front view of the operating member according to the present invention, FIG. 3 is a plan view of the operating member shown in FIG. 2, and FIG. 4 is a bottom view of the operating member shown in FIG. As shown in FIG. 2, the operation member 4 includes a shaft insertion hole 40, a locking operation part 41, a locking release part 42, a locking transition part 43, an operation side detachment prevention part 44, and a release side detachment prevention part 45. And a spring receiving projection 46.

  The locking operation part 41 is a cylindrical member. The unlocking portion 42 is disposed below the locking operation portion 41 and has a smaller outer shape than the locking operation portion 41. The locking transition portion 43 has a tapered cylindrical shape, and smoothly connects the outer peripheral surfaces of the locking operation portion 41 and the locking release portion 42. The operation side detachment preventing portion 44 is a flange-like member formed at the upper end portion of the locking operation portion 41, and the release side detachment preventing portion 45 is a flange-like member formed at the lower end portion of the locking release portion 42. is there. The spring receiving convex portion 46 is a cylindrical convex portion that protrudes upward from the upper portion of the operation side detachment preventing portion 44 and has an outer diameter on which the coil spring 8 is fitted.

  As shown in FIGS. 3 and 4, the operation-side detachment prevention unit 44 and the release-side detachment prevention unit 45 are partially cut so as to be slidable inside the column 2. It is a plate-shaped member which has. That is, flat portions 441 and 451 are formed on the outer circumferences of the operation-side detachment prevention unit 44 and the release-side detachment prevention unit 45, and the plane portions 441 and 451 are at the same position with respect to the axis of the operation member 4. In other words, they are formed so as to be arranged on the same plane. The operation member 4 is arranged inside the column 2 so that the plane portions 441 and 451 can slide on the inner surface of the plane portion 201 of the column 2.

  The locking member 3 is pushed by the locking operation portion 41 or the release operation portion 42 of the operation member 4, and a part of the locking member 3 protrudes to the outside of the column 2. Since the locking operation portion 41 has a larger outer diameter than the release operation portion 42, the surface in contact with the locking member 3 is close to the flat portion 201 of the support column 2, and the locking member 3 is the locking operation portion. When it is in contact with 41, the amount of protrusion is larger than when it is in contact with the release operation unit 42.

  Next, the operation of the armrest device according to the present invention will be described with reference to the drawings. FIG. 5 is a diagram of the armrest device in a state where the locking of the guide body and the support is released, and FIG. 6 is a diagram of the state in which the support is lifted together with the armrest. In addition, FIG. 1 is referred as description of the latching state of the guide body 1 and the support | pillar 2. As shown in FIG.

  As shown in FIG. 1, the operating member 4 is pushed downward by the coil spring 8 when the grip portion 5 is not pulled up, that is, when the armrest device is not operated, and the locking member 3 is locked. It is in contact with the portion 41. Then, the side of the locking member 3 opposite to the portion pressed by the locking operation portion 41 protrudes to the outside of the column 2, and the protruding portion is in contact with the inner surface of the guide body 1. When the locking member 3 is pushed by the locking operation portion 41 and the through hole 21 of the support column 2 and the locking portion 11 of the guide body 1 overlap, a part of the locking member 3 becomes a locking portion. 11 is inserted. When the locking member 3 is fitted into the locking portion 11, sliding of the support column 2 is limited.

  Even when the locking member 3 is in contact with the locking operation portion 41, a part of the locking member 3 remains inside the column 2. When the operation member 4 is pushed by the coil spring 8, the operation side detachment preventing portion 44 of the operation member 4 comes into contact with a portion remaining inside the support column 2 of the locking member 3. Since the operation side detachment preventing portion 44 and the locking member 3 are in contact with each other, the downward movement of the operation member 4 due to the pressing of the coil spring 8 is suppressed, and the operation member 4 moves in the axial direction with respect to the support column 2. Is regulated. In addition, the locking member 3 is prevented from being detached from the operation member 4 due to the operation member 4 moving further in the axial direction with respect to the support column 2.

  The engaging body 61 is attached to the shaft member 6 so that a gap is formed between the lower end of the operating member 4 and the upper end of the engaging body 61. Thus, by attaching the engaging body 61 to the shaft member 6, the operation member 4 can be attached with a certain margin in the axial direction, and the deviation due to dimensional variations that occur during manufacturing and installation can be corrected. it can. When the armrest device is not operated by being pushed downward by the coil spring 8 as described above, the operation side detachment preventing portion 44 of the operation member 4 and the locking member 3 are brought into contact with each other, and the operation member 4 is stopped. The Further, as a method for connecting the operation member 4 and the shaft member 6, in addition to using the engaging body 61, the shaft member 6 is inserted into the shaft insertion hole 40 of the operation member 4 such as press-fitting, welding, and screwing with a screw. It is also possible to use a fixed method. However, in this case, each member is preferably formed with high dimensional accuracy.

  As shown in FIG. 5, when the grip portion 5 is pulled up, the engaging body 61 attached to the tip of the shaft member 6 engages with the lower surface of the operating member 4, and the operating member 4 is pushed up by the engaging body 61, and the coil spring 8 moves upward in the axial direction against the pressing force of 8. As the operation member 4 moves in the axial direction upward, the portion of the operation member 4 that comes into contact with the locking member 3 moves from the locking operation unit 41 to the release operation unit 42. Since the release operation portion 42 has a smaller outer diameter than the lock operation portion 41, the lock member 3 pushed by the lock operation portion 41 is released from the pressing force from the lock operation portion 41, and the release operation portion 41 Move to 42 side. As a result, the protruding amount of the locking member 3 that protrudes outside the support column 2 is reduced. In addition, the latching | locking part 11 and / or the through-hole 22 may be formed in the inclined shape extended toward the inside of the guide body 1 or the support | pillar 2, and in this case, the latching member 3 is easy to move inside.

  When the locking member 3 is in contact with the release operation portion 42, the tip protruding from the support column 2 of the locking member 3 does not contact the guide body 1. Thereby, the support | pillar 2 can move freely to an axial direction with respect to the guide body 1. FIG. Note that the movement of the operation member 4 by pulling up the grip portion 5 is limited by the upper surface of the operation-side detachment preventing portion 44 of the operation member 4 coming into contact with the lower end of the spring guide portion 221 of the spring pushing portion 22. Thereby, it is possible to prevent the locking member 3 from being detached from the release operation portion 42 due to the movement amount of the operation member 4 becoming too large. Even if the movement of the operation member 4 may not be restricted by the spring guide portion 221, the movement of the operation member 4 can also be performed by the release side detachment preventing portion 45 coming into contact with the locking member 3 at the lower end portion of the release operation portion 42. Is limited. As a result, the locking member 3 is prevented from being detached from the through hole 21.

  And the armrest Ar and the support | pillar 2 are moved to an axial direction in the state which the holding part 5 was pulled up, and the movement of the armrest Ar up and down is possible (refer FIG. 6). In addition, when the armrest Ar and the support column 2 are moved in the axial direction in the state where the grip portion 5 is pulled up, the portion protruding from the support column 2 of the locking member 3 comes into contact with the convex portion 72 of the clamp lock member 7, The sliding of the column 2 is limited. Thereby, it is suppressed that the support | pillar 2 comes off from the guide body 1. FIG.

  Then, the operator returns the grip portion 5 near the desired height. As a result, the operation member 4 that has been pulled up is pushed downward by the elastic force of the coil spring 8. The portion in contact with the locking member 3 is switched from the release operation unit 42 to the locking operation unit 41, and the locking member 3 is pushed from the locking operation unit 41 to the outside of the column 2. At this time, since the release operation portion 42 and the lock operation portion 41 are connected by the taper-shaped lock transition portion 43, the lock member 3 moves relative to the lock operation portion 41 from the release operation portion 42. In addition, the locking member 3 can be moved smoothly. Thereby, the smooth operation of the armrest device is performed.

  When the locking member 3 is pressed against the inner surface of the guide body 1, the locking member 3 is rotatable. Since the locking member 3 is rotatable, the support column 2 is movable in the axial direction. In this state, the supporting member 2 is moved in the axial direction so that the through hole 21 and the engaging portion 11 overlap with each other, whereby the engaging member 3 is fitted into the engaging portion 11. Thereby, the movement of the column 2 in the axial direction is restricted. Further, the clamp lock member 7 is tightened, and the guide body 1 and the support column 2 are fixed.

  Note that the shape and size of the locking operation portion 41 are such that when the locking member 3 comes into contact with the locking operation portion 41 and is fitted into the locking portion 11, the locking operation portion 41 can be engaged with the locking-side detachment preventing portion 44. And the locking member 3 is pressed against the inner surface of the guide body 1 so that it can be rotated, and when the locking member 3 is fitted into the locking portion 11, It is determined so that there is no gap between them. Similarly, the outer diameter of the release operation part 42 is determined so that it can protrude outside the support column 2 to the extent that it can be engaged with the convex part 72 of the clamp lock member 7.

  By using the armrest device of the present invention, the grip 5 is pulled upward, and the lock between the guide body 1 and the column 2 is released. Since the grip portion 5 is disposed above the armrest Ar, the operator can easily operate even in a narrow cockpit. Further, even when the operator is seated on the control seat of the cockpit, the operation of the grip portion 5 is easy, and the armrest after the seating can be adjusted. This can reduce fatigue of the body such as the arms and back regardless of the physique of the operator.

  The armrest device of the present invention is described as a mechanism for moving the armrest Ar up and down, but in addition to this, it is a mechanism for moving the armrest in the horizontal direction (front-rear direction and / or left-right direction with respect to the control seat). It may be used. Moreover, although it has set as the structure which suppresses rotation by making the support | pillar 2 and the operation member 3 into the circular shape which cut | disconnected a part, it is not limited to this, The cross-sectional shape of a guide body, a support | pillar, and an operation member is polygonal. You may make it suppress rotation as a shape. Further, by using a bendable (flexible) member as the shaft member, it is possible to employ a curved guide body and a shaft of the support column. Furthermore, although the above-described configuration is a configuration including one locking member, the configuration is not limited thereto, and a configuration including a plurality of locking members may be employed. With this configuration, the locking force between the locking member, the locking portion, and the through hole can be increased, so the clamp lock member may be omitted. In this case, a member for preventing the column from coming off may be separately attached, or a protrusion that contacts the locking member may be formed by an extrusion process for pushing out the inner surface of the guide body. Moreover, you may provide a holding part not in the upper part of an armrest but in the place where operators, such as the front-end | tip of an armrest, are easy to operate.

  The present invention can be applied to an adjustment device that adjusts the position of an armrest on which an elbow is provided in a control seat of a cockpit of a construction machine or the like.

DESCRIPTION OF SYMBOLS 1 Guide body 11 Locking part 2 Support | pillar 200 Curved surface part 201 Plane part 21 Through hole 22 Spring pressing part 220 Sliding hole 221 Spring guide part 23 Bracket 3 Locking member 4 Operation member 40 Shaft insertion hole 41 Locking operation part 42 Release operation Part 43 Engagement transition part 44 Engagement side detachment prevention part 45 Release side detachment prevention part 46 Spring receiving convex part 5 Gripping part 6 Shaft member 61 Engaging body 7 Clamp lock member 71 Band-shaped part 72 Convex part 8 Coil spring Ar Armrest Mb Body

Claims (4)

A cylindrical guide body fixed to the vehicle body;
A cylindrical column that is movably inserted into the guide body and has an armrest at the end,
An armrest device for a construction machine having locking means for locking the column to an arbitrary position of the guide body,
The locking means includes a plurality of locking portions provided in the axial direction of the guide body at intervals,
One through hole provided at a position corresponding to the locking portion of the support;
A locking member that penetrates the through hole and is locked to the locking portion;
A locking operation part that is accommodated in the column so as to be movable in the axial direction and that is locked to the locking part through the through hole by movement to one side, and the locking member and the An operating member having an unlocking portion for releasing the locking of the locking portion;
An armrest device for a construction machine, having one end connected to the operation member, the other end connected to a gripping portion, and a shaft member extending in an axial direction of the column so that the gripping portion protrudes from the column. The armrest device for a construction machine according to 1), wherein a locking transition portion is provided between the locking operation portion and the locking release portion. On the opposite side of the locking operation portion from the locking release portion, an operation side detachment preventing portion for preventing the locking member from being detached from the locking operation portion is provided. A release-side detachment preventing portion for preventing the locking member from being detached from the locking release portion is provided on the opposite side of the locking operation portion to the locking portion 1) Or the armrest apparatus of the construction machine as described in 2). The operation member has a shaft insertion hole through which the shaft member is inserted so as to be movable in the axial direction.
The shaft member has an engaging body that engages with the operation member at a portion that is inserted from the grip portion side into the shaft insertion hole and protrudes from the operation member.
The armrest device for a construction machine according to 1), 2) or 3), wherein a coil spring is provided between the support column and the operation member so as to be coaxial with the shaft member.

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