JP5046658B2 - Ignition switch device - Google Patents

Description

  The present invention relates to an ignition switch device capable of turning on or off a predetermined electric circuit disposed in a cylinder body in accordance with a rotation operation of an ignition key, and starting or stopping an engine of a boarding means.

  For example, construction machines such as excavators are generally used at outdoor construction sites, so there is a high possibility of splashing muddy water and sand in addition to rainwater. In winter, they are used in an environment of 0 ° C or below. There is also a case. Furthermore, the construction machine is usually subjected to intense vibrations and shocks that are generated in association with the operation for work.

  On the other hand, construction machines are usually left at construction sites even at night when work is not performed. Therefore, as an ignition switch device for starting or stopping the engine of the construction machine, the same general-purpose equipment as automobiles is used. The tumbler type is adopted. In addition, since the prior art which concerns on the conventional ignition switch apparatus in such a construction machine is not related to literature well-known invention, there is no prior art document information which should be described.

  In the conventional ignition switch device described above, the rotor is made of a resin material in order to prevent the occurrence of rust due to intrusion of rainwater or muddy water into the cylinder body. For this reason, there is a risk that the portion of the rotor that has come into contact with the ignition key will gradually wear due to continuous vibrations and impacts, which may cause other keys that are not regular ignition keys, for example. There was a possibility that the ignition switch device could be operated.

  The present invention has been made in view of such circumstances, and can satisfactorily maintain the start or stop operation of the engine by the rotation operation of the ignition key, and the ignition key can be operated even when severe vibration or impact is applied. It is an object of the present invention to provide an ignition switch device that can be securely held and that can reliably avoid an operation with a key other than a normal ignition key.

  According to a first aspect of the present invention, there is provided an ignition switch device capable of turning on or off a predetermined electric circuit disposed in a cylinder body in accordance with a rotation operation of an ignition key and starting or stopping an engine of a boarding means. It is fixed to the body and has a key hole portion that can match the key groove of a regular ignition key, and the ignition key can be rotatably engaged in a state where the key groove and the key hole portion match. A lock plate and a roller that engages with a front end side of the ignition key that has passed through the key hole portion of the lock plate and is rotatable with the ignition key, and can rotate the predetermined electric circuit by the rotation. It is characterized by having.

  According to a second aspect of the present invention, in the ignition switch device according to the first aspect, a key insertion hole is formed which is rotatably disposed on the upper side of the lock plate in the cylinder body and into which the ignition key can be inserted. And a rotor which can be rotated together with the ignition key.

According to a third aspect of the present invention, in the ignition switch device according to the second aspect, the rotor is energized as the rotor rotates , and the energizing direction of the roller is determined by a predetermined electric circuit. It is characterized by the direction of turning off .

  According to a fourth aspect of the present invention, in the ignition switch device according to any one of the first to third aspects, a fitting hole is formed at a predetermined position of the ignition key and is rotated with respect to the lock plate. It is characterized by comprising positioning means biased to fit into the fitting hole of the ignition key engaged in a possible state.

  According to a fifth aspect of the present invention, in the ignition switch device according to any one of the first to fourth aspects, the lock plate is formed by molding a resin material.

  According to the invention of claim 1, since the ignition key can be rotatably engaged in the key hole portion of the lock plate fixed to the cylinder body, the engine start or stop operation by the rotation operation of the ignition key is improved. In addition to maintaining the ignition key, it is possible to reliably hold the ignition key even when intense vibrations or shocks are applied, and to reliably avoid an operation with a key other than the normal ignition key.

  According to the second aspect of the present invention, the rotor that is rotatably disposed on the upper side of the lock plate in the cylinder body and has a key insertion hole through which the ignition key can be inserted is formed, and the rotor that can rotate together with the ignition key. Since it was equipped, the key hole part in a lock plate can be covered, and the antitheft effect can be improved.

According to the invention of claim 3, the rotor is energized as the rotor rotates , and the energizing direction is a direction in which the roller turns off the predetermined electric circuit. In the extracted state (that is, the roller is in the off position), the rotor can be surely brought into the off position, and the rotor and the roller are relatively displaced from each other so that the ignition key cannot be inserted. It can be avoided reliably.

  According to the invention of claim 4, the fitting hole is formed at a predetermined position of the ignition key, and is urged to be fitted into the fitting hole of the ignition key engaged with the lock plate in a rotatable state. Since the positioning means is provided, the ignition key can be held more stably and firmly. Therefore, the ignition key can be securely held even when severe vibration or impact is applied, and operations with keys other than the regular ignition key can be reliably avoided. In addition, since the positioning means is inserted into the fitting hole at the position where the ignition key is engaged with the lock plate in a rotatable state, moderation can be provided when the ignition key is inserted into the key hole. Can be improved.

  According to the invention of claim 5, since the lock plate is formed by molding a resin material, it is easy to form a key hole portion that can match the key groove of a regular ignition key, and the occurrence of rust is ensured. Can be prevented.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The ignition switch device according to the present embodiment is attached to a vehicle related to a construction machine such as an excavator, for example, and turns on or turns on a predetermined electric circuit disposed in the cylinder body in accordance with the rotation operation of the ignition key by the driver. The engine of the vehicle can be started or stopped, and as shown in FIGS. 1 to 4, the cylinder body 2, the lock plate 3, the roller 4, the rotor 5, the movable member 6, The fixing member 7 is mainly included.

  The cylinder body 2 constitutes the casing of the ignition switch device 1 according to the present embodiment, and the roller 4, the rotor 5 and the movable member 6 are fixed while the lock plate 3 and the fixing member 7 are fixed inside while opening up and down. Can be rotatably accommodated. The cylinder body 2 is formed by molding a highly rigid member such as a die cast, and is fixed to the driver's seat of the vehicle.

  The lock plate 3 is fixed to the inner peripheral wall of the cylinder body 2 and has a key hole portion 3a that can match the key groove b of the normal ignition key IK. The key groove b and the key hole portion 3a match. In this state, the ignition key IK can be rotatably engaged. That is, as shown in FIG. 9, the ignition key IK is composed of a gripping portion IKa and a key portion IKb, and a key groove b having a shape unique to the vehicle is formed in the key portion IKb. Even if an unauthorized ignition key IK is inserted, the key groove does not coincide with the key hole 3a of the lock plate 3 and is not rotatably engaged, thereby preventing unauthorized operation by a third party. It can be done.

  More specifically, as shown in FIG. 10, the key hole 3 a in the lock plate 3 has a front end side of the ignition key IK (a portion closer to the front end side than the key groove b and wider than the key groove b). A large-diameter portion 3d that can be inserted therethrough is formed, and other portions are shaped to match the key groove b. As a result, when the normal ignition key IK is rotated from the state shown in FIG. 6A to the state shown in FIG. 5B, the key groove b matches the key hole 3a, so that the key hole 3a (large The engagement in the insertion direction is achieved while allowing the rotation without interfering with the edge of the portion having a diameter smaller than the diameter portion 3d.

  Here, the lock plate 3 may be made of metal or the like, but is preferably formed by molding a resin material. That is, by forming the resin material into the lock plate 3, it is possible to easily form the key hole 3 a that can match the key groove b of the regular ignition key, and to surely prevent the occurrence of rust. Can do.

  Further, as shown in FIG. 6, the lock plate 3 has a protrusion 3 b formed on the side wall of the substantially annular member, and the protrusion 3 b is a recess (not shown) formed on the inner peripheral wall of the cylinder body 2. By locking and assembling, the movement in at least the rotational direction is restricted, and the cylinder body 2 is fixed. A locking hole 3c for locking one end of a torsion spring 10 described later is formed at a predetermined position of the lock plate 3.

  The roller 4 is disposed on the lower side of the lock plate 3 in the cylinder body 2, engages with the tip side of the ignition key IK that has passed through the key hole 3 a of the lock plate 3, and rotates together with the ignition key IK. It was made possible. That is, the roller 4 has a key insertion hole 4a formed at a position corresponding to the key hole 3a. The key insertion hole 4a is inserted into the front end side of the ignition key IK that has passed through the key hole 3a. It can be combined.

  The roller 4 is connected to and assembled with the movable member 6 via the rotating member 5, and the movable member 6 also rotates as the roller 4 rotates. A fixed member 7 fixed to the lower end of the cylinder body 2 is disposed on the lower side of the movable member 6, and a fixed contact and a predetermined electric circuit (not shown) are formed on the upper surface of the fixed member 7. Has been. Further, on the lower surface of the movable member 6, a movable contact that can be brought into contact with or separated from the fixed contact of the movable member 6 is formed.

  With this configuration, when the ignition key IK is rotated, the roller 4 rotates in the same direction, and the movable member 6 rotates accordingly, so that a predetermined electric circuit is turned on as the movable member 6 rotates. Or it can be turned off. A wiring K (see FIG. 8) extending from the vehicle side is connected to the fixing member 7 so that the vehicle engine can be started or stopped in accordance with the electric circuit being turned on or off.

  The rotor 5 is rotatably disposed on the upper side of the lock plate 3 in the cylinder body 2, and is formed with a key insertion hole 5a through which the ignition key IK (strictly, the key portion IKb) can be inserted. It can be rotated together with IK. That is, the key insertion hole 5a is formed in the key hole 3a formed in the lock plate 3 and the roller 4 so that the key opening IKb of the ignition key IK can be inserted with the upper opening facing outside. The leading end of the regular ignition key IK (key portion IKb) inserted through the key insertion hole 5a reaches the key insertion hole 4a.

  In the present embodiment, since the ignition key IK is inserted through the rotor 5, the key hole 3a in the lock plate 3 can be covered, and an ignition key that a third party should match with the key hole 3a. Since the IK can be prevented from being illegally manufactured, the anti-theft effect can be improved. Further, due to the interposition of the rotor 5, it can be made to have the same shape as an ignition switch device having an existing tumbler.

  Further, a torsion spring 10 is interposed between the rotor 5 and the lock plate 3 (see FIG. 6). Due to the urging force of the torsion spring 10, the rotor 5 is urged in a direction in which the roller 4 turns off a predetermined electric circuit in accordance with the rotation operation. That is, when the rotor 5 is rotated (rotated in the turning-on direction) in accordance with the rotation operation of the ignition key IK, the torsion spring 10 is twisted. It is energized against.

  Thus, in a state where the ignition key IK is removed (that is, the roller 4 is in the off position), the rotor 5 can be surely brought into the off position by the biasing force of the torsion spring 10, and the rotor 5 and the roller 4 Therefore, it is possible to reliably avoid that the ignition key IK cannot be inserted due to relative displacement. Note that, instead of the torsion spring 10, the rotor 5 may be biased in the direction of turning off by other biasing means.

  Incidentally, as shown in FIG. 9, a fitting hole a penetrating the front and back is formed at a predetermined position in the key part IKb of the ignition key IK. A steel ball 8 serving as a positioning means is disposed at a position corresponding to the fitting hole a of the ignition key IK inserted through the key insertion hole 5a and engaged with the lock plate 3 in a rotatable state. Has been. The diameter of the steel ball 8 is set so that the diameter of the steel ball 8 can be fitted into the fitting hole a, and is urged by the pressing spring 9 in the fitting direction.

  More specifically, as shown in FIG. 5, a groove shape 5 b is formed in the circumferential direction on the side surface of the rotor 5, and a part of the groove shape 5 b penetrates the inside and the outside of the rotor 5. A through hole 5ba (the opening on the inner side is set smaller than the diameter of the steel ball 8) is formed. The steel ball 8 and the pressing spring 9 are inserted into the through-hole 5ba, and the C-shaped holding ring 11 is fitted along the groove shape 5b, so that the pressing spring 9 is biased toward the inner side of the rotor 5. The steel ball 8 is assembled.

  Thus, the key portion IKb of the ignition key IK is inserted into the insertion hole 5a, and the fitting hole a reaches the position of the steel ball 8 (in this state, the key groove b of the ignition key IK and the key hole portion 3a are aligned). If the steel ball 8 is inserted into the fitting hole a, the ignition key IK can be held more stably and firmly.

  Therefore, the ignition key IK can be held more securely even when intense vibration or impact is applied, and operations by keys other than the regular ignition key can be reliably avoided. Further, since the steel ball 8 as the positioning means is inserted into the fitting hole a at a position where the ignition key IK is engaged with the lock plate 3 in a rotatable state, the ignition key IK is inserted into the key hole 3a. Sometimes moderation can be given and operability can be improved.

  According to the above ignition switch device, when the key portion IKb of the normal ignition key IK is inserted from the key insertion hole 5a of the rotor 5, the steel ball is formed when the key groove b is positioned corresponding to the key hole portion 3a. 8 is inserted into the fitting hole a, and the tip side is inserted into the key insertion hole 4 a of the roller 4. When the ignition key IK is rotated in a predetermined direction from this state (off position), the key groove b rotates to the on position while matching the key hole 3a.

  However, as the ignition key IK is rotated, the rotor 5 and the roller 4 are rotated, and the movable member 6 is rotated in the on direction, whereby a predetermined electric circuit is turned on and the engine is started. Thereafter, when the ignition key IK is rotated in the opposite direction (off direction), the rotor 5 and the roller 4 rotate in the same direction while maintaining the state where the key groove b matches the key hole portion 3a, and the movable member 6 is moved. A predetermined electric circuit is turned off by rotating in the off direction. As a result, the engine is stopped.

  In addition, two seal members S1 and S2 disposed on the top and bottom are fixed to the side surface of the roller 4 according to the present embodiment, and the outer peripheral surface of the roller 4 and the cylinder body 2 are fixed by the seal members S1 and S2. It is possible to seal between the inner peripheral wall surface. Thus, since sealing is performed by the upper and lower sealing members S1 and S2, it is avoided that rainwater, sand, or the like entering from the rotor 5 side reaches the predetermined electric circuit side (the movable member 6 and the fixed member 7 side). can do.

  According to the above embodiment, the ignition key IK can be rotatably engaged in the key hole 3a of the lock plate 3 fixed to the cylinder body 2, so that the engine can be started or stopped by rotating the ignition key IK. Can be maintained satisfactorily, and the ignition key IK can be reliably held even when intense vibrations or shocks are applied, and operations by keys other than the regular ignition key can be reliably avoided.

Next, a method for manufacturing the ignition switch device 1 according to this embodiment will be described.
First, as shown in FIG. 5, the steel ball 8 and the pressing spring 9 are inserted into the through hole 5ba of the rotor 5, and the holding ring 11 is fitted along the groove shape 5b. Then, as shown in FIG. 6, the lock plate 3 is attached to the lower part of the rotor 5 with a torsion spring 10 interposed. That is, one end of the torsion spring 10 is locked in the locking groove 5 c formed in the lower portion of the rotor 5, and the other end of the torsion spring 10 is locked in the locking hole 3 c of the lock plate 3. 5 and the lock plate 3 are connected via a torsion spring 10 to form one component.

  The rotor and the lock plate 3 assembled in this way are assembled on the upper part of the roller 4 to which the fixed member 7, the movable member 6, the rotating member 5 and the seal members S1 and S2 are attached, and the sub as shown in FIG. Assy A. In a state where the sub assembly A is inserted from the lower opening of the cylinder body 2 and the protrusion 3b of the lock plate 3 is locked and fixed to a recess (not shown) formed on the inner peripheral wall of the cylinder body 2, When the assembly is completed by fixing the sub-assembly A in the cylinder body 2 with screws or the like, and the wiring K is connected as shown in FIG. 8, the ignition switch device 1 according to the present embodiment can be obtained. .

  According to the manufacturing method as described above, since the rotor 5 and the lock plate 3 are connected via the torsion spring 10 to form one component, workability during manufacturing can be improved. Similarly, the assembly is completed by accommodating and fixing the sub-assembly A in the cylinder body 2, so that the workability at the time of manufacture can be further improved.

  Although the present embodiment has been described above, the present invention is not limited to this. For example, the rotor 5 is eliminated as a component through which the ignition key IK is inserted, and only the lock plate 3 and the roller 4 are included. Also good. Even in this case, the ignition key IK can be rotatably engaged in the key hole 3a of the lock plate 3 fixed to the cylinder body 2, so that the engine can be started or stopped by rotating the ignition key IK. Can be maintained satisfactorily, and the ignition key IK can be reliably held even when intense vibrations or shocks are applied, and operations by keys other than the regular ignition key can be reliably avoided.

  In this embodiment, the sealing members S1 and S2 are arranged in two upper and lower stages, but one or three or more sealing members may be arranged. In addition, in this embodiment, although attached to the vehicle which concerns on construction machines, such as a shovel car, you may apply to the ignition switch apparatus of other vehicles or boarding means (a ship, a snowmobile, etc.).

  The key body is fixed to the cylinder body and has a key hole that can match the key groove of a regular ignition key, and the ignition key is rotatably engaged with the key groove and the key hole being aligned. A lock plate to be obtained, and a roller that engages with the front end side of the ignition key that has passed through the key hole of the lock plate and is rotatable with the ignition key, and can turn on or off a predetermined electric circuit by the rotation. As long as the ignition switch device is provided, the present invention can also be applied to devices having different external shapes or those having other functions added.

The front view of the ignition switch apparatus which concerns on embodiment of this invention 1 is a side view of an ignition switch device according to an embodiment of the present invention. III-III line sectional view in FIG. Sectional view along line IV-IV in FIG. A perspective view showing a rotor in the ignition switch device A perspective view showing a rotor and a lock plate in the ignition switch device The perspective view which shows the assembly method of the ignition switch device Overall perspective view showing the ignition switch device The perspective view which shows the ignition key applied to the ignition switch device The positional relationship of the keyway and keyhole part in the ignition switch device is shown, and is a schematic diagram showing a state in which (a) the ignition key is inserted, and (b) a state in which the ignition key is rotated.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ignition switch apparatus 2 Cylinder body 3 Lock plate 3a Key hole part 4 Roller 4a Key insertion hole 5 Rotor 5a Key insertion hole 6 Movable member 7 Fixed member 8 Steel ball (positioning means)
9 Pressing spring 10 Torsion spring 11 Retaining ring IK Ignition key a Fitting hole b Keyway

Claims (5)

In the ignition switch device that can turn on or off a predetermined electric circuit disposed in the cylinder body in accordance with the rotation operation of the ignition key, and start or stop the engine of the riding means.
The key body is fixed to the cylinder body and has a key hole that can match the key groove of a regular ignition key, and the ignition key is rotatably engaged with the key groove and the key hole being aligned. A lock plate that can
A roller that engages with the front end side of the ignition key that has passed through the key hole of the lock plate and is rotatable with the ignition key, and can turn on or off the predetermined electric circuit by the rotation;
An ignition switch device comprising:   The cylinder body includes a rotor that is rotatably disposed on an upper side of the lock plate, is formed with a key insertion hole through which the ignition key can be inserted, and is rotatable with the ignition key. The ignition switch device according to claim 1. 3. The ignition switch according to claim 2, wherein the rotor is biased in accordance with the rotation of the rotor , and the biasing direction is a direction in which the roller turns off a predetermined electric circuit. apparatus.   A fitting hole is formed at a predetermined position of the ignition key, and positioning means biased to fit into the fitting hole of the ignition key engaged in a rotatable state with respect to the lock plate is provided. The ignition switch device according to any one of claims 1 to 3, characterized in that:   The ignition switch device according to any one of claims 1 to 4, wherein the lock plate is formed by molding a resin material.

Images