JP4961892B2 - Unlocking mechanism for rotating seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock releasing mechanism capable of quickly and easily rotating a rotary seat. <P>SOLUTION: This lock releasing mechanism 2 of the rotary seat 110 is used for an industrial vehicle. The rotary seat 110 is rotatably arranged in a base part 100B of the industrial vehicle, and a lock mechanism 1 puts the rotary seat 110 in a nonrotatable lock state to the base part 100B. A grip operation part 270 can be gripped by hand by a worker seated on the rotary seat 100, and can release the lock state of the rotary seat 110 by the grip operation part 270. Rotary operation of the rotary seat 110 can be performed by muscular strength of the hand of gripping the grip operation part 270 of the seated worker. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a lock release mechanism for a rotating seat used in an industrial vehicle.

  As a seat rotation mechanism used in a driver's seat or the like, for example, a mechanism disclosed in Patent Document 1 is generally known. This type of sheet rotation mechanism has a member fixed to the lower part of the sheet and a member (base member) fixed to the installation location (base) of the sheet. It is supported so that it can rotate. With such a configuration, a rotating sheet that can rotate with respect to the base is obtained.

  Moreover, normally, such a rotation sheet is provided with a lock mechanism for making it a locked state that cannot be rotated during operation (see Patent Document 2). Such a locking mechanism is, for example, connected to a lever provided on the base where the rotating seat is installed and in the vicinity of the rotating seat with a wire, and a driver (operator) operates the lever. The locked state is released and the rotating sheet can be rotated. That is, such a lever functions as a lock release mechanism for the rotating sheet.

Japanese Patent Laid-Open No. 5-18961 Japanese Utility Model Publication No.59-105527

  When the rotating seat provided with the lock release mechanism as described above is installed and used in an industrial vehicle, the rotating seat is fixed facing the front during normal use. This is because operating devices and instruments necessary for operating the vehicle are installed in the front. On the other hand, for example, when the vehicle is moving backward, it is assumed that the rotating seat is preferably rotated and fixed in a predetermined direction different from the front direction. In that case, it is necessary to perform a two-stage operation of first operating the lever on the base to release the locked state, and then rotating the rotating sheet, which takes time. In addition, when rotating the rotating seat described above, the driver presses the foot against the base and rotates the rotating seat mainly using the leg force, but the rotating operation against the rotating seat and the weight of the driver. Therefore, a large leg force is required and the rotating seat cannot be easily rotated.

  Therefore, an object of the present invention is to provide a lock release mechanism that can rotate a rotating sheet quickly and easily.

Means and effects for solving the problems

In order to achieve the above object, a rotating seat unlocking mechanism of the present invention is a rotating seat unlocking mechanism used in an industrial vehicle, and is a rotary seat rotatably installed at a base of the industrial vehicle; A locking mechanism that locks the rotating seat with respect to the base, and a grip portion and a lock release lever that are attached to at least a pillar or a head guard of the industrial vehicle. A grip operation part that can be gripped by a hand of a seated operator and can be released from the locked state, and the rotating seat is rotated by arm force of a hand that holds the grip operation part. operation can der is, the grip portion is supported by the pillars or the overhead guard, the unlocking lever, the pillar or the header In between the guard and the grip portion, that is attached to the grip portion.

According to this configuration, the operator who is seated on the rotating seat can release the locked state of the rotating seat at the grip operating portion and can grip the grip operating portion for the rotating operation. Therefore, when the rotating sheet is rotated and fixed in a predetermined direction, the locked state can be released and the rotating sheet can be rotated with a single operation, and the grip operation unit can be grasped. The rotating seat can be easily rotated by the arm strength of the hand. Therefore, the rotating sheet can be quickly and easily rotated. In addition, since the grip operation unit is fixed at a stable position, the rotating sheet can be rotated more easily. In addition, since the unlocking lever is attached to the grip portion between the pillar or the head guard and the grip portion, the unlocking operation is facilitated, so that the rotating seat can be rotated more quickly.

  The grip operation unit may be attached to the right rear pillar. According to this, since the grip operation unit is fixed at a stable position and is in a position that is easy to be gripped when the operator wants to rotate the rotating sheet in the right direction, the rotating sheet can be used when retreating. Can be rotated quickly and easily.

  The lock mechanism and the grip operation unit may be connected by a wire. According to this, the rotating sheet can be rotated quickly and easily with a simple configuration.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

  First, a rotating sheet and a rotating sheet unlocking mechanism according to the present embodiment will be described with reference to FIG. FIG. 1 is a perspective view of a driver's seat area of an industrial vehicle (forklift or the like) to which the rotary seat lock release mechanism according to the present embodiment is applied.

  As shown in FIG. 1, the driver seat area 100 includes a rotating seat 110, a base 100B where the rotating seat 110 is installed, pillars 110A, 110C, 120A, and 120C, and a head guard 130. Yes. Further, the locking mechanism 1 for the rotating sheet 110 includes a plate member 20 fixedly installed at a lower portion of the rotating sheet 110, a stopper member (described later) attached to the plate member 20, and a base fixedly installed on the base 100B. A member 30 and a rotating shaft 50 that rotatably supports the plate member 20 with respect to the base member 30 are provided. The rotating seat 110 is for a driver (operator) of the industrial vehicle to sit down and can rotate with respect to the base 100B with the rotating shaft 50 as a fulcrum. Further, in front of the rotating seat 110, operating devices and instruments necessary for operating the vehicle are installed (not shown). In the following description, the front / rear / left / right direction indicates the front / rear / left / right direction based on the driver seated on the rotating seat 110.

  Further, in the driver seat area 100, the rotating seat unlocking mechanism 2 can be held by the driver seated on the rotating seat 110, the locking mechanism 1, and the rotating seat 110 and unlocked. And a possible grip operation portion 270. Here, the grip operation part 270 is attached to the right rear pillar 110 </ b> C, and the plate member 20 of the lock mechanism 1 and the grip part 270 are connected by a wire 80. Further, the wire 80 is connected to the lock mechanism 1 through the inside of the pillar 110C.

  FIG. 2 is a top view showing a rotating state of the rotating sheet 110 according to the present embodiment, and corresponds to a view taken along the arrow A-A ′ in FIG. 1. As shown in FIG. 2A, the rotating seat 110 is fixed toward the front so that a driving operation can be performed during normal driving. For example, when the vehicle is moving backward, the rotating seat 110 is rotated and fixed to the right from the front (see FIG. 2B). This is because it is convenient to operate the front operating device while directly viewing the rear depending on the positional relationship with the operating devices such as pedals necessary for driving. Further, when getting off, the rotating seat 110 is rotated and fixed to the left from the front (see FIG. 2C). The lock mechanism 1 can switch between an unlocked state in which the rotating sheet 110 can rotate and a locked state in which the rotating sheet 110 cannot rotate. Further, the lock state is released by the lock mechanism 1 by remotely operating the swing lever 40 attached to the plate member 20 using the grip operation unit 270. Hereinafter, details of the lock mechanism 1 will be described with reference to FIGS. 3 to 6.

(Base member)
First, the base member 30 will be described with reference to FIG. The base member 30 is fixed to the vehicle base 100B as described above, and is a plate-like member formed by punching and bending a metal plate. Near both sides of the base member 30 (left and right in FIG. 3), contact portions 34a and 34b are formed. The contact portions 34a and 34b are formed with fixing holes 30h for fixing the base member 30 to the vehicle base 100B using bolts or the like. A horizontal portion 34c that is slightly higher than the height of the contact portions 34a and 34b is formed between the contact portions 34a and 34b, and the upper surface of the horizontal portion 34c is a flat surface. In addition, a rotating shaft 50 that rotatably supports the plate member 20 with respect to the base member 30 is installed in front of the horizontal portion 34c so as to be perpendicular to the horizontal plane 34c.

  In addition, shaft members 32a, 32b, and 32c similar to the rotation shaft 50 are vertically installed on the upper surface of the horizontal portion 34c. The shaft member 32a is forward and close to the contact portion 34a, and the shaft member 32b is The shaft member 32c is disposed in the rear part near the contact part 34b.

  In addition, a guide groove 31 that defines a rotatable range of the plate member 20 is formed in the horizontal portion 34 c of the base member 30. The guide groove 31 is a groove hole into which a stopper member (described later) provided on a swing lever 40 (described later) of the plate member 20 is inserted. The guide groove 31 is a groove formed in an arc shape around the rotation shaft 50 in front of the rotation shaft 50, and locking grooves 31 a and 31 b are formed at predetermined positions of the guide groove 31 toward the rear. ing. The guide groove 31 defines a rotatable range of the plate member 20 in a range of 25 degrees to the right and 17 degrees to the left.

  The locking grooves 31 a and 31 b are formed in a wedge shape whose groove width becomes narrower as the distance from the guide groove 31 increases so that the stopper member attached to the plate member 20 can easily enter. The locking groove 31b is a groove for the front position formed continuously from the middle part of the guide groove 31. When the stopper member is locked to the locking groove 31b, the rotation of the plate member 20 is changed to the left and right. Is fixed at a front position of 0 degrees. The locking groove 31a is a groove for the left rotation position, and when the stopper member is locked to the locking groove 31a, the plate member 20 is fixed at the left rotation position where the rotation is about 17 degrees in the left direction. The

(Plate member)
Next, the plate member 20 will be described with reference to FIGS. 4 and 5. The plate member 20 is a plate-like member that is rotatably supported by the base member 30 via the rotation shaft 50. As shown in FIG. 4, the plate member 20 is configured to include a seat base portion 24a and low surface portions 24b and 24c that are one step lower than the seat base portion 24a.

  The rotating seat 110 is attached to the upper surface of the seat base 24a, and the lower surface 24b is formed in front of the plate member 20 and the lower surface 24c is formed in the rear. A shaft hole 24h and arcuate guide grooves 22a and 22b are formed in the front low surface portion (hereinafter referred to as the front low surface portion) 24b, and the rotation shaft 50 and the left and right shafts of the base member 30 are respectively formed. The members 32a and 32b are inserted. An arcuate guide groove 22c is formed in the rear low surface portion (hereinafter referred to as the rear low surface portion) 24c, and the rear shaft member 32c is inserted into the guide groove 22c.

  The guide grooves 22 a to 22 c in the front low surface portion 24 b and the rear low surface portion 24 c are formed in an arc shape centering on the rotation shaft 50, and the length of each guide groove 22 a to 22 c is the rotatable range of the plate member 20. Is set to a length corresponding to the guide groove 31 of the base member 30. In a state where the plate member 20 is connected to the base member 30, nuts 50a and 33a to 33c for retaining are attached to the rotary shaft 50 and the shaft members 32a to 32c, respectively. Further, the front lower surface portion 24b is formed with a stopper support groove 21 into which a stopper member 41 provided on the swing lever 40 is inserted in a state where the swing lever 40 is attached to the plate member 20 (see FIG. 5). At a position away from the stopper support groove 21, a swing shaft 25 that supports the swing lever 40 so as to be swingable with respect to the plate member 20 is disposed (see FIG. 5).

  The stopper support groove 21 defines the swing range of the swing lever 40, and the stopper member 41 is moved from the guide groove 31 to the locking grooves 31a and 31b (from the locking grooves 31a and 31b to the guide groove 31). It can be moved. Thereby, the movement of the stopper member 41 with respect to the plate member 20 is defined in a direction in which the stopper member 41 is locked in the locking grooves 31a and 31b (hereinafter referred to as a locking direction) and in the opposite direction. Further, the width of the stopper support groove 21 is narrowed toward the front end of the locking grooves 31a and 31b (that is, the rear side) with respect to the guide groove 31 (see the enlarged view of FIG. 8). Further, a reinforcing plate 27 having a hole corresponding to the stopper support groove 25 is attached to the upper surface of the front lower surface portion 24b and around the stopper support groove 21. Deformation of the support groove 21 is prevented.

  Next, the lock mechanism 1 in an assembled state including the base member 30 and the plate member 20 will be described with reference to FIGS. 5 and 6.

(Swing lever)
A shaft hole 40h through which the swing shaft 25 is inserted is formed in an intermediate portion of the lever main body 45 of the swing lever 40, and the swing lever 40 can swing on the plate member 20 by the swing shaft 25. It is attached. In the swing lever 40, one end portion of the lever main body 45 inserted through the swing shaft 25 extends to the right side of the plate member 20, and a wire connection portion 45h is formed at the tip portion thereof. The wire 80 is connected to the wire connecting portion 45h. Further, the other end portion of the lever main body 45 is disposed so as to overlap the stopper support groove 21, and a stopper member 41 inserted into the stopper support groove 21 is provided at the other end portion. The stopper member 41 penetrates the stopper support groove 21 of the plate member 20 and is inserted into the guide groove 31 (or the locking grooves 31a and 31b) of the base member 30 as shown in FIG. Further, the central axis direction related to the movement of the stopper member 41 substantially coincides with the swing direction of the swing lever 40.

  The width of the stopper member 41 is narrowed toward the front end of the locking grooves 31a, 31b (that is, the rear side) with respect to the guide groove 31 so as to correspond to the shape of the locking grooves 31a, 31b ( (See FIG. 8).

  Then, by using the grip operation unit 270 to remotely operate the swing lever 40 connected to the grip operation unit 270 by the wire 80, the stopper member 41 is locked to the locking grooves 31a and 31b as described later. It is possible to switch between the locked state and the unlocked state of the rotating sheet 110 by causing the rotating sheet 110 to move or move to the guide groove 31. Then, in the unlocked state of the rotating seat 110, the rotating seat 110 can be rotated by the arm force of the hand sitting on the rotating seat 110 and the hand holding the grip portion 270. At this time, the stopper member 41 attached to the plate member 20 moves along the guide groove 31.

  A coil spring 43, which is an elastic member that biases the swing lever 40, is provided at the other end of the lever 45. The coil spring 43 is provided with a swing lever 40 so that the stopper member 41 is always urged in a direction in which the stopper member 41 is locked in the locking grooves 31a and 31b (hereinafter referred to as a locking direction). It is fast. The shaft hole 40 h has a long hole shape, and the longitudinal direction of the shaft hole 40 h substantially coincides with the guide direction along the guide groove 31. Therefore, the swing lever 40 can be swung against the urging force of the coil spring 43, and when the stopper member 41 is moved from the locking grooves 31a, 31b to the guide groove 31, the shaft hole 40h The swing lever 40 corresponding to the gap in FIG. In addition, since the shaft hole 40h is a long hole, when the swing lever 40 is operated to move the stopper member 41 between the guide groove 31 and the locking grooves 31a and 31b, the engagement of the stopper member 41 is increased. Smooth switching between stop and release is possible.

(Grip operation part)
Next, the grip operation unit 270 will be described with reference to FIG. As described above, the grip operation unit 270 is attached to the right rear pillar 110C. In the present embodiment, the grip operation unit 270 is provided separately from the right rear pillar 110C, but may be integrally formed with the right rear pillar 110C. Further, the position in the height direction of the grip operation unit 270 is set to be approximately the height of the shoulder of the seated driver. The grip operation unit 270 includes a grip portion 271 for gripping by hand and a lock release lever 272 connected to the wire 80.

  The grip portion 271 has a structure that is supported at two locations in the vertical direction by the right rear pillar 110C, and a screw on the side facing the rotating seat 110 of the right rear pillar 110C so as to be easily gripped by the driver. It is attached using 271B (upper and lower two places). The lock release lever 272 is attached to the grip portion 271 and swings about the root shaft as a rotation shaft by the driver's gripping operation (see the broken line portion in the figure). Further, the lock release lever 272 is located between the right rear pillar 110 </ b> C and the grip portion 271.

  When the driver pulls the lock release lever 272 forward while holding the grip portion 271 and the lock release lever 272 (see the broken line portion in the figure), the wire 80 in FIG. 5 is pulled downward in the figure, and the swing lever 40 Swings around the swing shaft 25. Then, the locking mechanism 1 releases the locking of the stopper member 41 to the locking groove 31 a or 31 b, and the stopper member 41 moves to the guide groove 31. In other words, the locked state of the rotating sheet 110 is released and the unlocked state is set.

  The swing lever 40 is biased by a coil spring 43 in a direction in which the stopper member 41 is locked to the locking grooves 31a and 31b. In addition, the lock release lever 272 is also urged toward the rear pillar 110C as viewed from the driver by an elastic member (not shown). Therefore, when the operation of the lock release lever 272 is loosened, the lock release lever 272 moves to the back side for the driver (corresponding to the position of the solid line in the figure), and also in the lock mechanism 1 (the stopper member 41 is The stopper member 41 is in a locked state in which the stopper member 41 has moved from the guide groove 31 toward the locking grooves 31a and 31b (when the locking grooves 31a and 31b are positioned in the guide groove 31). As described above, it is possible to switch between the locked state and the unlocked state of the rotating sheet 110 by operating the lock release lever 272.

(Operation of rotating seat and lock mechanism)
Next, the operation of the rotating sheet 110 according to the present embodiment will be described. First, it is assumed that the rotating seat 110 is in a normal driving state facing the front (the state shown in FIG. 2A). At this time, since the stopper member 41 is locked in the locking groove 31 b (see FIG. 8A), the movement of the plate member 20 in the rotation direction is suppressed, and the plate member 20 is moved relative to the base member 30. It is locked so that it cannot rotate. Furthermore, the elastic force of the coil spring 43 always urges the stopper member 41 in the direction in which the stopper member 41 is locked to the locking groove 31b. Therefore, when the swing lever 40 is not operated, the stopper member 41 is kept locked to the locking groove 31a. Here, the swing lever 40 can move relative to the swing shaft 26 by an amount corresponding to the clearance in the shaft hole 40h. In addition, since the stopper member 41 and the locking groove 31b are wedge-shaped narrower toward the leading end on the locking groove 31b side, the stopper member 41 that has moved along the guide groove 31 is locked. It is easy to enter the groove 31b.

  Next, an operation for rotating the rotating sheet 110 to change the direction will be described. For example, when the industrial vehicle is retreating, the direction of the rotating seat 110 is rotated to the left so that the driver's body faces the right side of the front (the state of FIG. 2B). Visual recognition is easy and convenient. In order to rotate the rotating sheet 110, first, it is necessary to release the locking of the stopper member 41 with respect to the locking groove 31b. Therefore, the stopper member 41 positioned in the locking groove 31b is moved toward the guide groove 31. Then, the swing lever 40 is operated. In the present embodiment, the driver first holds the grip portion 271 of the grip operation portion 270, and (at the same time) pulls the lock release lever 272 of the grip operation portion 270 forward. This operation is performed against the urging force of the coil spring 43. In the operation of the swing lever 40, when the stopper member 41 moves away from the locking groove 31b, the swing lever 40 has the swing shaft 25 as a fulcrum, so the stopper member 41 is centered on the swing shaft 25. Draw an arc trajectory.

  In this way, with the stopper member 41 positioned in the guide groove 31 (unlocked state), the rotating seat 110 (plate member 20) is moved to the left by the arm strength of the hand of the driver holding the grip portion 271. And the driver can turn to the right. Thus, the driver seated on the rotating seat 110 can release the locked state of the rotating seat 110 in the grip operation unit 270 and can grip the grip operation unit 270 for the rotation operation. Therefore, when the rotating sheet 110 is rotated and fixed in a predetermined direction, the locked state can be released and the rotating sheet 110 can be rotated by one operation, and the grip operation unit 270 can be operated. The rotating sheet 110 can be easily rotated by the arm force of the hand holding the handle. Therefore, the rotating sheet can be quickly and easily rotated.

  Further, the grip operation part 270 is attached to the right rear pillar 110C. For this reason, the grip operation unit 270 is fixed at a stable position and is easily gripped when the driver wants to rotate the rotating sheet 110 in the direction facing the right. 110 can be rotated quickly and easily. In the present embodiment, the rotating seat 110 is rotated by the driver's arm force, but the driver's leg power or the like may be used to assist the rotation.

  As described above, when the rotating sheet 110 (plate member 20) is rotated to the left (see FIG. 8B), the stopper member 41 reaches the locking groove 31a for the left rotation position ((FIG. 8 ( c))). At this time, when the gripping force of the lock release lever 272 is loosened, the urging force of the coil spring 43 is received, and the swing lever 40 moves in a direction in which the stopper member 41 is locked in the locking groove 31a ((FIG. 8 (d))). At this time, the stopper member 41 is easily locked to the locking groove 31a by appropriately moving the swing lever 40 with respect to the swing shaft 25 as needed by operating the lock release lever 272.

  When the stopper member 41 is locked in the locking groove 31a, as shown in FIG. 6, the plate member 20 is rotated to the left with respect to the base member 30, and the stopper member 41 is locked in the locking groove 31a. Is done. As a result, the rotating sheet 110 is rotated about 17 degrees to the left with respect to the front direction. In this state, the seated driver turns to the right from the front, and the rotating seat 110 rotates to the left (the driver turns to the right unless the unlocking lever 272 (the swing lever 40) is operated again). Maintained). That is, the rotating sheet 110 is locked.

  As described above, according to the unlocking mechanism 2 according to the present embodiment, when the rotating sheet 110 is rotated and fixed in a predetermined direction, the unlocking state and the rotating sheet 110 are rotated. The rotating sheet 110 can be easily rotated by the arm force of the hand that holds the grip operation unit 270 and can be performed by a single operation. Therefore, the rotating sheet can be quickly and easily rotated.

  Moreover, since the grip operation part 270 is attached to the pillar 110C, the rotating sheet 110 can be rotated more easily by fixing the grip operation part 270 at a stable position.

  Further, since the unlocking lever 272 is attached to the grip portion 271 between the pillar 110C and the grip portion 271, the unlocking operation is facilitated, and the rotating sheet 110 can be rotated more quickly. .

  Moreover, since the lock mechanism 1 and the grip operation part 270 are connected by the wire 80, the rotating sheet 110 can be quickly and easily rotated with a simple configuration.

(First modification)
Next, a first modification of the present embodiment will be described with a focus on differences from the above-described embodiment with reference to FIG. In addition, about the part similar to said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. In the unlocking mechanism 3 for the rotating seat according to this modification, the grip operation unit 370 is attached to the industrial vehicle head guard 130. Even with such a configuration, the rotating sheet 110 can be more easily rotated by fixing the grip operation unit 370 to a stable position.

(Second modification)
Next, a second modification of the present embodiment will be described with a focus on differences from the above-described embodiment with reference to FIG. In addition, about the part similar to said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. In the above embodiment, the rotating seat 110 is rotated to the left. However, when the driver gets out of the driver seat area 100, when the rotating seat 110 is rotated to the right, the driver's body is on the vehicle exit side. This is convenient for getting off (the state of FIG. 2 (c)). Therefore, in the unlocking mechanism 4 for the rotating seat according to this modification, the grip operation unit 470 is attached to the left front pillar 120A. With such a configuration, the grip operation unit 470 is fixed at a stable position and is easily gripped when the driver wants to rotate the rotating seat 110 in the direction facing the left. The rotating sheet 110 can be rotated quickly and easily. When the rotating sheet 110 (plate member 20) is rotated in the right direction, since the locking groove is not formed in the portion corresponding to the right rotation of the guide groove 31 (see the portion 31c in FIG. 8), the plate member In the position where 20 is rotated to the right, the locked state is not established.

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

  For example, in the above embodiment, two locking grooves are formed in the plate member, but the number of locking grooves is not limited to this, and may be larger than this.

  Further, the shape of the stopper member and the stopper support groove is not limited to the shape as in the above embodiment. For example, a hexagonal columnar stopper member and a stopper support groove having a corresponding shape may be used. Moreover, you may provide a grip operation part in two places, a right back pillar and a left front pillar.

The perspective schematic diagram of the driver's seat area containing the lock release mechanism of the rotation seat concerning one embodiment of the present invention. FIG. 3 is an explanatory diagram showing a rotating state of a rotating sheet, corresponding to the A-A ′ arrow view of FIG. 1. (A) is a state during normal operation. (B) is the state at the time of reverse. (C) is the state when getting off. The top view which shows the base member of FIG. The top view which shows the plate member of FIG. The top view which shows the locking mechanism of the rotation sheet | seat of FIG. FIG. 6 is a top view showing a state where the plate member is rotating in the rotating sheet locking mechanism of FIG. 5. FIG. 2 is a schematic perspective view showing the grip operation unit of FIG. 1. FIG. 6 is an explanatory diagram showing a stopper member locking operation in the rotating sheet locking mechanism of FIG. 5. The perspective schematic diagram which shows the lock release mechanism of the rotating seat which concerns on the 1st modification of this embodiment. The perspective schematic diagram which shows the lock release mechanism of the rotating seat which concerns on the 2nd modification of this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Locking mechanism 2, 3, 4 Unlocking mechanism 80 of rotating sheet Wire 110 Rotating sheet 110C Right rear pillar 120A Left front pillar 130 Head guard 270, 370, 470 Grip operation part 271 Grip part 272 Unlock lever

Claims (3)

An unlocking mechanism for a rotating seat used in an industrial vehicle,
A rotating seat rotatably installed at the base of the industrial vehicle;
A lock mechanism that locks the rotating seat with respect to the base, and a locking state;
At least a pillar or a head guard of the industrial vehicle has a grip portion and a lock release lever, and an operator seated on the rotating seat can hold it by hand and can release the lock state. A grip operation unit,
The rotating seat, Ri rotation operation can der by physical force of the hand holding the grip operation portion,
The grip portion is supported by the pillar or the head guard,
The unlocking lever, the pillar or between said head guard and the grip portion, unlocking mechanism of the rotary sheet characterized that you have attached to the grip portion. The rotary grip unlocking mechanism according to claim 1 , wherein the grip operation unit is attached to a right rear pillar. The lock mechanism and the lock release mechanism of the rotary sheet according to claim 1 or 2 and the grip operation portion, characterized in that it is connected by a wire.

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