JP2005337224A - Engine starter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine starter which makes it possible to easily start an engine by simply pulling a recoil rope in a field site where a starting operation can easily be carried out, and to start the engine which is at rest through one action in the field site which does not allow for an easy starting operation of the engine. <P>SOLUTION: Buffer/force storing means (9, 10, 11) are mounted in a driving force transmitting system between a driving section (D) and a driven section (M) to provide an engine starting time selection means (13, 15, 16) which allows for the optional selection of an engine starting time to the driven section (M) of the engine starter (1) which automatically starts the engine by pulling the rope (6). Furthermore, the driven section (M) preferably has a torque limiter (9, 8, 10; 10, 82, 83, 84) which disables storing a larger force through a recoil operation when the force stored in the buffer/force storing means (9, 10, 11) reaches the requirement for starting the engine, and which transmits an annunciation signal which annunciates that the stored force has reached the requirement. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an internal combustion engine starter, and more particularly, to an engine starter that can start smoothly with a weak pulling force of a recoil rope, and to start the engine safely and reliably even in a place where the pulling operation of the recoil rope is difficult. It is related with the starting device which can be made.

  A manual internal combustion engine starter usually rotates a rope reel by pulling a recoil rope, and transmits the rotation of the rope reel to the crankshaft of the engine to start the engine. The starter not only needs to be pulled at a somewhat high recoil rope pulling speed, but also has a long pulling length. For this reason, an internal combustion engine cannot be easily started by an elderly person or a person with weak power. Therefore, an engine starting device that can easily start an internal combustion engine even by a person with a small recoil rope pulling force is disclosed in, for example, Japanese Utility Model Publication No. 1-91075 (Patent Document 1) and Japanese Patent Publication No. 52-23025 (Patent Document). Document 2), Japanese Patent Application Laid-Open No. 2001-132591 (Patent Document 3), Japanese Patent Application Laid-Open No. 2001-65435 (Patent Document 4), and the like.

  Among these, according to the engine starting device of Patent Document 1, a recoil drum wound around a recoil rope, which is arranged on a coaxial line, and a first spring that biases the recoil rope in a direction wound around the recoil drum, The first ratchet formed on the recoil drum, the second ratchet claw provided on the crankshaft of the engine, the second ratchet engaged when the engine starts and rotates, and the ratchet connected to the second ratchet A second spring that accumulates a spring force that rotates in the engine starting direction; and a second spring provided in the second ratchet and engaged with the first ratchet to rotate the recoil drum via the second ratchet. A first ratchet pawl that transmits to the spring and accumulates a spring force in the spring, and detachably engages with the second ratchet, And a stopper member for preventing rotation of the second ratchet by the spring force of 2 mainspring.

  In order to start the engine with this starting device, the stopper member is engaged with the second ratchet in advance, the recoil rope is pulled an appropriate number of times, the recoil drum is rotated, and a sufficient spring force is accumulated in the second spring. When the engagement between the stopper member and the second ratchet is disengaged at the start of the engine, the crankshaft is rotated by the spring force of the second spring to start the engine. When accumulating the spring force in the second spring, only the spring is rotated and no load is applied from the engine. Therefore, the pulling force of the recoil rope is small, and even a weak person can easily pull the recoil rope. The engine can be reliably started when necessary.

  On the other hand, the engine starting devices of Patent Documents 2 and 3 exclude the stopper member from the engine starting device of Patent Document 1, and the spring force accumulated in the second spring exceeds the maximum load in the compression stroke of the engine. The spring force of the second spring is not released, and the spring force is released at the moment when the spring force of the second spring exceeds the maximum load in the compression stroke of the engine to rotate the crank, and the engine automatically Start.

In addition, the engine starting device of Patent Document 4 includes a mainspring accumulator mechanism, a manual rope reel that causes the mainspring accumulator mechanism to accumulate rotational force, and rotation on the output side of the mainspring accumulator mechanism. A reset lever having a stopper that holds the rotational force to a predetermined torque, and a transmission mechanism that transmits the accumulated rotational force to the crankshaft of the internal combustion engine when the stopper is released. Note that the reset lever can be manually switched from the stop position to the free position, and the engine can be automatically started by the same operation as in Patent Document 3. That is, according to this engine starting device, unless the reset lever is normally set to the free position, the stopper is at the stop position and prevents the output side of the mainspring energy storage mechanism from rotating. In this state, pull the recoil rope several times to cause the mainspring energy storage mechanism to store enough energy to start the engine. When sufficient energy is stored, the reset lever automatically moves to the free position. Then, the engine is started, and even a weak person can easily operate the engine.
Japanese Utility Model Publication No. 1-91075 Japanese Patent Publication No. 52-23025 JP 2001-132591 A JP 2001-65435 A

  By the way, according to the engine starting device of Patent Document 1, even if the recoil rope is pulled when the stopper member is not engaged with the second ratchet, the second ratchet causes the outer end portions of the recoil drum and the second spring to be pulled. Since it rotates together with the case to be fixed, no spring force is accumulated in the second spring, and the engine cannot be started. Therefore, in order to start the engine with this engine starting device, it is necessary to engage the stopper member with the second ratchet in advance. In addition, according to this starting device, the required spring force is not accumulated unless the recoil rope pulling operation is performed a plurality of times. Therefore, for an operator having a normal force, it is troublesome to start and it is difficult to get used to it.

  On the other hand, in the engine starting devices of Patent Documents 2 and 3, since the engine can be automatically started simply by pulling the recoil rope, the working efficiency is improved if the working space is wide and stable. However, for example, when trying to prun trees using a chainsaw equipped with this engine starter, there are inevitably many unstable work sites that are high and have poor footing. Because of the overhanging branches and leaves, it must be a work in a narrow space where free operation is difficult. At work sites where it is difficult to secure a foothold at such a high place, the engine is usually stopped while the engine is stopped, and the engine is started by largely pulling the recoil rope. At this time, there are many cases where the surrounding branches and the like get in the way or the scaffolding does not solidify and the recoil rope pulling operation cannot be performed well.

  Further, the engine starting device disclosed in Patent Documents 2 and 3 is also mounted on a shoulder type, for example, a brush cutter, which carries out the work while carrying the engine. This backpack-type mower has an engine and a long operation pipe connected by a flexible pipe, and a flexible shaft is inserted through the flexible pipe and the transmission inserted through the operation pipe. The rotating blade attached to the tip of the operation tube is rotated by the rotation of the transmission shaft coupled with the shaft. In addition to the flexible pipe, a plurality of wires and lead wires are interposed between the engine and the connecting end of the operation tube. In order to start the engine of such a backpack type mower, for example, a long operation tube is gripped with the left hand and the recoil rope is pulled with the right hand. Since the pulling operation at this time carries the engine on the back, the operation handle of the recoil rope is pulled forward from the front. This operation is not only very difficult to operate, but also requires a very large pulling force as compared with the case where the recoil rope is pulled forward. During this engine starting operation, the rotating blade at the tip must be held in the air while paying attention to the surrounding area while holding the front end of the long operation tube with the left hand. .

  On the other hand, according to the engine starting device disclosed in Patent Document 4 described above, in a state where the stopper is applied, the recoil rope is pulled to reset the buffer / accumulating means at a stage where sufficient energy is stored to start the engine. The lever automatically moves and the stopper comes off, causing the engine to start automatically. Therefore, even in this device, it is impossible to arbitrarily select the engine start time. Also, in order to start the engine by moving the reset lever to the free position, the recoil rope must be pulled large and quickly as in the conventional case. Therefore, in the above-mentioned high place where the recoil rope cannot be pulled quickly and quickly, or in a work site where the surrounding operation space is narrow, it is not possible to store the required stored power in the buffer / power storage means in advance. Therefore, the engine must be started by pulling the recoil rope several times at the site. If this pulling operation is also impossible, the operation is a manual operation, which is an extremely inefficient operation.

  The present invention has been made to solve the various problems of the conventional manual engine starting device at the same time, and its specific purpose is only a recoil rope pulling operation at a site where the engine starting operation is easy. It is an object of the present invention to provide an engine starter that can easily start the engine and enables one-touch start with the engine stopped at a site where the engine start operation is difficult.

  The object is to provide a buffering / accumulating means in the power transmission system between the drive unit and the driven unit having a recoiling mechanism, which is the basic configuration of the present invention, and to automatically connect the driven unit and the engine. It is connected via a connecting / disconnecting means, and the power of the drive unit is stored in the buffer / accumulation means arranged between the driven part, and the stored force of the buffer / accumulation means is the maximum load of the engine. In the engine starting device for starting the engine by automatically rotating the driven portion when the accumulated power is released, the driven portion can be arbitrarily started at the start timing of the engine. Timing selection means is arranged, and the first start mode for automatically starting the engine by automatically rotating the follower and the second start mode for arbitrarily selecting the engine start timing can be arbitrarily switched. En characterized by It is effectively achieved by the emission starting device.

  The start timing selecting means disables further accumulating by the recoil operation when the accumulated power of the buffering / accumulating means reaches the required amount for starting the engine, and the accumulated power is reduced to the required amount. It is preferable to further include torque limiter means for issuing a notification signal informing that it has been reached.

  The automatic connecting / disconnecting means stops the driven portion until the accumulated force of the buffer / accumulator means exceeds the engine maximum load, and starts the engine rotation when the accumulated force exceeds the engine maximum load, A connection / disconnection mechanism is provided that automatically disconnects the engine when the engine reaches a predetermined rotational speed. Further, the start timing selection means includes a switching member for switching the stop / rotation of the driven portion, and an engaging / disengaging member for engaging / disengaging the driven portion by a switching operation of the switching member. It is preferable that the switching member and the engagement / disengagement member are connected via a link or elastic means.

  According to a preferred aspect, the driven portion is constituted by a rotating member having a ratchet, the engaging / disengaging member has an engaging / disengaging claw for engaging / disengaging with the ratchet, and the switching member is disposed on a case surface of the engine starting device. A sliding type switching member that engages and disengages the engaging and disengaging claw with the ratchet by a sliding operation of the sliding type switching member. According to another preferred aspect, the driven portion is constituted by a rotating member having a ratchet, the engaging / disengaging member has an engaging / disengaging claw for engaging / disengaging with the ratchet, and the switching member is a case of the engine starting device. A push-type switching member disposed on the surface, and the engagement / disengagement claw is engaged / disengaged with the ratchet by a pressing operation of the push-type switching member.

Effect

  If the engine starting site is wide and the recoil rope pulling operation can be performed safely, select the automatic start side of the start timing selection means, pull the recoil rope large as before, and increase the energy storage capacity of the buffer / accumulation means. It can be used to start the engine directly. On the other hand, for work at a high place, for example on a tree, the start timing selection means is switched to the side that stores the necessary storage force for the buffering / accumulation means while maintaining the engine stop state, and the ground operation is performed. Pull the recoil rope in a wide area where it is easy to store, and store the necessary energy storage in the buffer and energy storage means in advance. In this state, the vehicle goes to the site, where the start timing selection means is switched to the engine start side. By this switching, the accumulated power stored in the buffering / accumulating means is fully released, and the engine is automatically started via the driven portion.

  As described above, according to the present invention, the start timing of the engine can be arbitrarily selected by the start timing selection means. Therefore, the start timing selection means can be directly operated by pulling the recoil rope in a place where the engine is easily started. A switching operation is performed to the side where the engine can be started, and the engine is started by pulling the recoil rope on the spot. In this case, the engine is automatically started by pulling the recoil rope quickly and greatly. On the other hand, when an elderly person with weak power tries to work, or when the engine needs to be started in a place where the recoil rope is difficult to pull, the accumulated power of the buffering / accumulating means is stored. A start time selection means capable of starting one engine at a time is put in an operating state. Even if the person is weak, if the recoil rope is pulled apart several times, the energy required to start the engine can be reliably stored in the buffering / accumulating means, and it is sufficient to operate the engine. When the accumulated power is stored, the engine can be instantly started by a simple operation of simply switching the start timing selection means to the engine start side, for example.

  If the start timing selection means is further provided with a torque limiter means as described above, the engine start timing selection means in particular is a lock that stores the necessary storage force for the buffering / accumulation means while maintaining the engine stopped state. When the switch is turned to the side and is in the operating state, when the recoil rope is pulled in advance in a wide area where it is easy to operate on the ground, and the required accumulator sufficient to start the engine is stored in the buffer / accumulator In addition, it is possible to easily know whether or not a sufficient accumulation force is necessary for switching the selection of the start timing selection means to the unlock side, that is, the engine start side. If such a torque limiter means is not provided, the recoil rope may be pulled many times until the accumulated force reaches the limit, or the lock may be released while the accumulated force is insufficient to start the engine. . However, by providing the torque limiter means as described above, it is possible to easily confirm visually or by signal sound whether or not the buffering / power storage means has stored the power required for starting the engine. Therefore, after confirming that the recoil rope pulling operation is not excessive or insufficient, and that the accumulated power is sufficient, switch the start timing selection means to the unlock side. The engine can be started reliably and instantaneously.

  On the other hand, as the automatic connecting / disconnecting means, for example, when an automatic connecting / disconnecting mechanism comprising an engaging claw that engages / disengages with the driven portion using high-speed rotation of the engine and a clutch, an engaging / disengaging hole, etc. is adopted, Is connected to the engine side via the connecting / disconnecting mechanism until the stored power of the buffer / power storage means exceeds the maximum load of the engine, and the rotation is stopped, and the stored power is the maximum load of the engine If it exceeds, the engine is started by rotating in a state where the connection between the driven portion and the connecting / disconnecting mechanism is maintained by releasing the accumulated power. Here, when the engine reaches a required rotation speed, the connection between the driven portion and the connection / disconnection mechanism is automatically disconnected by the high-speed rotation, and the operation of the engine is continued.

  When the start timing selecting means includes a switching operation member and an engagement / disengagement member for the driven portion, the engagement member is engaged with and disengaged from the driven portion by operating the switching member. Unlock can be switched. By this engagement / disengagement operation, the stop / rotation of the driven portion, that is, the stop and start of the engine can be selected. Further, if the switching member and the engagement / disengagement member are connected to each other via a link or elastic means, the operation for stopping / rotating the driven portion can be reliably performed. Here, when the driven portion is constituted by a rotating member having a ratchet, and the engaging / disengaging member is constituted by an engaging / disengaging claw that engages / disengages with the ratchet, the switching member is arranged on the case surface of the engine starting device. Slide type or push type switching members can be adopted, and by simply sliding or pressing those switching members, the engaging and disengaging claw can be easily and reliably engaged with or disengaged from the ratchet. The part can be reliably stopped or rotated.

Preferred embodiments for carrying out the invention

Hereinafter, a preferred embodiment of an engine starter according to the present invention will be specifically described with reference to the drawings. In this embodiment, a starter for a small air-cooled internal combustion engine applied to a chainsaw is illustrated, but it can be applied as a similar engine starter such as a brush cutter or a rotary saw.
1 is a cross-sectional view showing an example of the internal structure of a small engine equipped with an engine starter according to the present invention, FIG. 2 is an exploded perspective view of components disposed inside the case body of the engine starter, and FIG. 4 is a perspective view showing the arrangement of members when the internal structure is assembled, FIG. 4 is an internal structural view showing an engagement state of the start timing selection means, and FIG. 5 is an internal view showing a disengagement state of the start timing selection means in the start device. FIG.

  As shown in FIGS. 1 and 2, the small engine 100 according to the present embodiment is automatically connected to the engine starting device 1 of the present invention, the ratchet wheel 8 on the driven portion side of the starting device 1, and the ratchet wheel 8. The crankshaft 101 to be engaged and disengaged, the fan 102 fixed to the crankshaft 101, the engine main body 103 connected to the crankshaft 101, the output shaft 104 connected to the engine main body 103, and these devices And an operation handle 106 installed on the upper surface of the case 105 in the front-rear direction and on the left side surface in the vertical direction. The operation handle 106 is provided with a throttle lever 106a and the like.

  As shown in FIGS. 2 and 3, the engine starter 1 is disposed close to one end of the crankshaft 101 so that the axis of the small engine 100 is substantially coincident with the crankshaft 101. The engine starter 1 is accommodated and installed in the case body 2 as shown in FIG. The case body 2 is provided with a first boss portion 21 projecting toward the crankshaft side. Each engine starting member described below is sequentially assembled to the first boss portion 21 and fixed to the case body 2 by a set screw 3.

  The engine starter 1 includes a drive unit D and a driven unit M. The drive unit D includes a recoil spring 4 whose one end is in contact with the inner surface of the case body 2, and a circular hole 51 formed in the center with the same shape as the chestnut cross section. A spring case 5 that is positioned and fixed in contact with the coil, a recoil rope 6 having a handle 61 at one end, and a recoil rope 6 that is wound around the recoil rope 6 by winding the other end of the recoil rope 6 and fixing it on the peripheral surface. And a reel 7. One driven portion M includes a ratchet wheel 8 in which two ratchet portions 8a and 8b having different diameters are integrally arranged on a coaxial line. Between the drive part D and the driven part M, the buffering / accumulating means in this embodiment is interposed. The buffering / accumulating means includes a spring end positioning ratchet wheel 9 that engages with the recoil reel 7 and rotates in one direction, and an energy storage coil having one end fixed to the spring end positioning ratchet wheel 9. A spring 10 and a spring end fixing member 11 that engages and fixes the other end of the coil spring 10 are provided.

  Further, according to the present embodiment, there is provided the start timing selection means that can store the necessary and sufficient accumulated power in the buffer / accumulation means in advance and can arbitrarily select the engine start timing, which is the most characteristic configuration of the present invention. ing. The start timing selection means selects the automatic start side of the start timing selection means in a place where the engine start site is wide and the pulling operation of the recoil rope 6 can be performed safely and reliably. The engine is immediately started using the stored power stored in the coil spring 10 for a large storage force. For example, in a work site where it is difficult to pull the recoil rope 6 at a high place like a tree, The start timing selection means is switched to the side where the engine storage state is maintained while the engine stop state is maintained, and the recoil rope 6 is pulled in a place where the operation is easily performed on the ground. The necessary energy storage is stored in advance. In this state, the vehicle goes to the site, where the start timing selection means is switched to the engine start side. By this switching, the stored power stored in the power storage coil spring 10 is instantly fully released, and the engine is immediately started via the driven portion M.

  As shown in FIG. 2, an outer end fixing portion 42a that engages with the inner surface of the case body 2 is formed at the outer end of the recoil spring 4 disposed in the drive portion D, and the recoil is arranged on the inner inner peripheral surface. An inner end fixing portion 42b that is fixed to a part of the rear side of the reel 7 is formed.

  The recoil spring 4 configured in this way is positioned in a state where the outer end fixing portion 42 of the mainspring main body and the insertion hole 5a of the mainspring case 5 substantially coincide with each other. Further, the insertion hole 5a is loosely fitted to a second boss portion 22 formed on the inner surface of the case body 2, and is positioned so as not to rotate on the first boss portion.

  As shown in FIG. 2, the recoil reel 7 has two annular flange portions 71, each of which has an outer peripheral portion bulging in the radial direction, and a recoil rope 6 wound around the inner periphery. The rope winding part 72 which has the outer peripheral surface for doing is formed. At the edge of the space portion surrounded by the rope winding portion 72 on the opposite side to the first boss portion 21, there is a boss portion 73 protruding toward the direction away from the case body 2 at the center portion, and A disc 74 having a shape similar to a wheel hub in which a plurality of rectangular windows 75 are formed at equal intervals so as to surround the central boss 73 is integrated. An engaging hole 74 a for engaging the inner end fixing portion 42 b of the mainspring 4 is formed at an eccentric position near the periphery of the central boss portion 73 of the disc portion 74.

  In order to assemble the recoil reel 7 to the engine starting device according to the present embodiment, the recoil spring 4 is fixed to the case body 2 via the spring case 5 as described above, and then the inner end of the recoil spring 4 is fixed. This is done by engaging and fixing the fixing portion 42 b to the engaging hole 74 a of the recoil reel 7. One end of the recoil rope 6 is fixed between the bulging portions of the pair of flange portions 71 of the recoil reel 7. On the other hand, the winding end of the recoil rope 6 is drawn out of the case from a rope outlet 23 of the case body 2, and a handle 61 is fixed to the withdrawal end of the recoil rope 6. With the recoil rope 6 wound around the recoil reel 7, the central boss portion 73 of the recoil reel 7 is loosely fitted from the outside to the first boss portion 21 protruding from the case body 2.

  The inner end fixing portion 42b of the recoil spring 4 is fixed to the engagement hole 74a of the recoil reel 7, and one outer end fixing portion 42a of the recoil spring 4 is fixed to the case 2 as described above. By fixing, when the recoil rope 6 is pulled, an engagement / disengagement claw portion 93 of a spring end positioning ratchet wheel 9 which will be described later is engaged with the rectangular window 75 of the recoil reel 7. By this locking, when the recoil reel 7 is rotated in the direction of accumulation, the inner end of the recoil spring 4 fixed to the recoil reel 7 rotates together with the recoil reel 7, and the recoil reel 7. The power from is stored in the mainspring 4. Here, when the pulling force of the recoil rope 6 is released, the engagement between the engaging / disengaging claw portion 93 of the spring end positioning ratchet wheel 9 and the rectangular window 75 of the recoil reel 7 is released, that is, the spring 4 is stored. The recoil reel 7 reverses in the direction in which the force is released, and the recoil rope is automatically rewound onto the recoil reel 7.

  The spring end positioning ratchet wheel 9 that engages with the recoil reel 7 and rotates in one direction is a disc member that fits inside the disc portion 74 of the recoil reel 7 as shown in FIG. As shown in FIG. 4, a boss portion 91 projecting on the opposite side to the recoil reel 7 is provided at the center portion. The boss 91 is loosely fitted from the outside to the central boss 73 of the recoil reel 7. Further, a peripheral wall portion 92 that is partially cut off is formed on the protruding side periphery of the boss portion 91, and the circle of the recoil reel 7 is formed on the back surface periphery opposite to the protruding side of the boss portion 91. Engaging / disengaging claw portions 93 that engage with and disengage from the plurality of rectangular windows 75 formed at the inner end of the mainspring body 42 are formed in the vicinity of the central boss portion 73 protruding from the center of the plate portion 74. Has been. According to this embodiment, six rectangular windows 75 are formed, and three engagement / disengagement claw portions 93 are formed with a phase difference of 120 °. As shown in FIG. 2, the shape of the claw portion 93 is such that the rear end gradually rises upward from the surface of the main body 9a of the spring positioning ratchet wheel 9 toward the front end in the circumferential direction. It is formed on a vertical surface 93a orthogonal to the surface of 9a.

  When the spring positioning ratchet wheel 9 is assembled to the recoil reel 7, the spring positioning ratchet wheel 9 is formed between the rope winding portion 72 and the central boss portion 73 of the recoil reel 7. It fits in the disc part 74 so that free rotation is possible. At this time, the spring positioning ratchet wheel 9 is always pressed toward the disc portion 74 of the recoil reel 7 by the pressing spring 94 shown in FIG. As a result, at the end of assembly, some of the engaging / disengaging claw portions 93 are engaged with some of the rectangular windows 75 of the recoil reel 7. When the spring positioning ratchet wheel 9 is assembled to the recoil reel 7 in this manner, a part of the engagement / disengagement claw portion 93 is engaged with a part of the rectangular window 75 of the recoil reel 7 and the recoil reel 7 Rotate together.

  On the other hand, one end portion 10b of the accumulator coil spring 10 is engaged with and fixedly positioned in a part of the peripheral wall portion 92 of the ratchet wheel 9 for spring positioning. The one end portion 10b of the coil spring for accumulating force 10 is bent in parallel to the axis thereof and extends beyond the spring body 10a, and the length of the one end portion 10b is engaged with the spring end fixing member 11. It is said to be long. On the other hand, the other end portion 10c of the same accumulator coil spring 10 is also bent in parallel with the axis thereof and extended to the outside of the spring main body 10a, and the length thereof is the length engaged with the ratchet wheel 8. Has been.

  As shown in FIG. 2, the spring end fixing member 11 includes a ring-shaped disk portion 11a and three legs extending radially outward from the ring-shaped disk portion 11a with a phase difference of approximately 120 °. Part 11b. A screw insertion hole for fixing to the fixed portion of the case body is formed at the tip of each leg portion 11b. Further, the one end portion 10b of the coil spring for accumulating force 10 is engaged with the inner diameter surface of the ring-shaped disc portion 11a in the accumulating direction. The ratchet wheel 8 which is a constituent member of the driven portion M is attached to the outer surface side of the spring end fixing member 11 through a gap so as to be freely rotatable.

  The ratchet wheel 8 includes a two-layer ratchet mechanism in which a large-diameter first ratchet portion 8a and a small-diameter second ratchet portion 8b arranged concentrically are stacked together. Further, the ratchet wheel 8 is formed in a cylindrical shape having a step in the axial direction in which a retaining screw insertion hole is formed in the central portion, and the common wall portion of the first and second ratchet portions 8a, 8b An engagement hole 8c for engaging the other end portion 10c of the power storage coil spring 10 is formed. Around the first ratchet portion 8a of the ratchet wheel 8, a substantially L-shaped bending lever 13 which is one of the constituent members of the start timing selecting means which is the most characteristic of the present invention is rotatably arranged. ing.

  The start timing selection means includes a substantially L-shaped bending lever 13 having an engaging claw portion 13a that engages and disengages with the first ratchet portion 8a at one end, and a sliding type for rotating the bending lever 13. A switching member 16 and a C-shaped link 15 connecting the bending lever 13 and the sliding switching member 16 are provided. The bending lever 13 is attached at a position away from the first boss portion 21 of the case body 2 so that the bending lever 13 can rotate around the bending portion 13b. The slide type switching member 16 is attached to the surface position of the case body 2 in the vicinity of an operation grip (not shown) and can be easily operated by a fingertip. The engaging claw portion 13a of the bending lever 13 is urged in a direction to be engaged with the first ratchet portion 8a by an urging spring 14 as shown in FIGS. For ease of operation, it is preferable that the slide type switching member 16 is disposed in the vicinity of the operation handle 106 as shown in FIG.

  One end hook portion 15a of the C-shaped link 15 is hooked in the end hook hole 13c ′ of the rotation operation portion 13c opposite to the engaging claw portion 13a of the bending lever 13 across the bending portion 13b. Yes. Further, the other end hook portion 15 b of the C-shaped link 15 is hooked in a hook hole 16 c of the slide type switching member 16 attached to the outer surface of the case body 2 in the vicinity of the recoil rope outlet 23. . As shown in FIG. 1, the slide type switching member 16 has a curved surface whose upper surface protrudes upward, and a head portion 16a having a plurality of anti-slip grooves formed on the surface thereof, and a head portion 16a of the head portion 16a. And a thin plate-like slide portion 16b protruding downward from the lower surface. A hooking hole 16c for hooking the other end hook portion 15b of the C-shaped link 15 is formed in the slide portion 16b.

  On the other hand, in order to allow the slide type switching member 16 to slide on the surface of the case body 2, a slit 2a for loosely fitting the thin plate-like slide portion 16b is formed at the slide type switching member arrangement position of the case body 2. The head portion 16a of the slide type switching member 16 is disposed on the surface of the case body 2 and the slide portion 16b is inserted into the slit 2a, and the slide type switching member 16 is connected to the C-shaped link 15. It connects with the rotation operation part 13c of the said bending lever 13 via. Now, in order to rotate the bending lever 13 in order to remove the engaging claw portion 13a from the first ratchet portion 8a against the bias of the biasing spring 14, the slide type switching member 16 is moved along the slit 2a. Slide in the direction to remove the engaging claw 13a. By this sliding operation, the turning operation portion 13c of the bending lever 13 is pulled through the C-shaped link 15 and turned clockwise in FIG. 4, and the engaging claw portion 13a is moved to the first position as shown in FIG. The locked state of the first ratchet portion 8a is maintained by being detached from the ratchet portion 8a. When the sliding type switching member 16 is slid in the reverse direction, the engaging claw portion 13a is rotated in a direction to be engaged with the first ratchet portion 8a by the urging force of the urging spring 14, and the engaging member is engaged as shown in FIG. The claw portion 13a is locked to the first ratchet portion 8a.

The second ratchet portion 8b is engaged with, for example, a well-known ratchet pawl (not shown) that is attached to a crankshaft of an engine (not shown) and automatically disengaged due to centrifugal force when the engine rotates at high speed. . Here, since the structure and function of this centrifugal clutch are well-known, the detailed description is abbreviate | omitted.
The above starting members are assembled so as to be sequentially stacked with the first boss portion 21 of the case body 2 as the central axis, and are accommodated and fixed inside the case body 2 with the retaining screws 3.

The operation of the engine starter 1 according to the present embodiment configured as described above will be described.
First, the normal starting operation of the engine starting device 1 by the pulling operation of the recoil rope 6 in a wide work site will be described. When starting the engine, first, the engaging claw portion 13a of the bending lever 13 is moved to the ratchet wheel 8. The slide type switching member 16 is slid in the direction of removing from the first ratchet portion 8a to place the ratchet wheel 8 in the unlocked state shown in FIG. Next, when the handle 61 is held and the recoil rope 6 is pulled largely, the recoil reel 7 is rotated in one direction. The rotation of the recoil reel 7 causes the inner end portion of the mainspring 4 to rotate in the direction of accumulating force to accumulate force. At this time, the rectangular window 75 of the recoil reel 7 is engaged with the engagement / disengagement claw portion 93 of the spring end positioning ratchet wheel 9 for positioning and fixing the power storage coil spring 10. The recoil reel 7 is rotated in the direction in which the mainspring 4 is accumulated, and as described above, a part of the power is accumulated in the mainspring 4 and at the same time, the ratchet wheel 9 is also rotated in the same direction as the recoil reel 7.

  By rotating the ratchet wheel 9 for positioning the spring end, the one end portion 10b of the coil spring 10 for accumulating the one end portion 10b positioned and fixed to the ratchet wheel 9 is rotated in the direction of accumulating force with the rotation of the ratchet wheel 9. Rotate to. During this rotation, the other end portion 10c of the accumulator coil spring 10 is engaged with the ratchet wheel 8 as the driven portion M, while the second ratchet portion 8b of the ratchet wheel 8 has an engine side crank. An engagement / disengagement claw (not shown) that is attached to the shaft and is released by centrifugal force is engaged. This engagement / disengagement claw has a known structure that is unlocked by centrifugal force. The ratchet wheel 9 continues to rotate when the engine is in a stopped state. However, when the accumulated force of the accumulation coil spring 10 exceeds the maximum load when the engine is compressed, the ratchet wheel 8 is rotated to rotate the engine. Start. When engine driving enters a steady state, the engagement / disengagement claw automatically disengages from the ratchet wheel 8 by centrifugal force due to high-speed rotation of the crankshaft, and the crankshaft continues high-speed rotation.

  When the recoil rope 6 is loosened after the engine is started in this way, the stored power stored in the mainspring 4 is released, the recoil reel 7 is rotated in the direction to release the stored power, and the recoil rope 6 is automatically operated. Then, it is rewound onto the recoil reel 7. As described above, according to the engine starting device according to the present embodiment, the sliding type switching member 16 is first slid, and the engaging claw portion 13a of the bending lever 13 is removed from the first ratchet portion 8a of the ratchet wheel 8. If so, the engine 100 can be reliably started by simply pulling the recoil rope 6 as in the prior art.

  On the other hand, for example, when the work site is at a high place and there is not enough space around the site to pull the recoil rope 6 greatly, when the scaffolding is poor, or when the arm strength is weak and it is difficult to pull the recoil rope 6 rapidly. In order to start the engine when the rope 6 cannot be pulled all at once, the sliding type switching member 16 is previously slid in the locking direction opposite to the above-described direction, and the bending lever 13 is engaged. The claw portion 13a is engaged with the first ratchet portion 8a of the ratchet wheel 8 to be in the locked state shown in FIG. 4, and the rotation of the ratchet wheel 8 is positively stopped. When the recoil rope 6 is pulled in this state, the recoil reel 7 is rotated with the rotation of the ratchet wheel 9 for positioning the spring end, and the power is stored in the accumulator coil spring 10 as described above.

  At this time, for example, the drawing operation of the recoil rope 6 is stopped in the middle, the stored power of the mainspring 4 is released, the recoil reel 7 is rotated in a direction in which the engagement with the ratchet wheel 9 is released, and the recoil rope 6 is recoiled. The reel 7 can be rewound. During the rotation of the recoil reel 7, the recoil reel 7 and the ratchet wheel 9 do not engage with each other, but the one end 10 b is positioned and fixed to the ratchet wheel 9. The one end 10 b is further locked to the ratchet surface 11 c of the spring end fixing member 11, which is a fixing member, and the other end 10 c of the same accumulating coil spring 10 is engaged by the engaging claw 13 a of the bending lever 13. Since the ratchet wheel 9 is engaged with the ratchet wheel 8 of the driven portion M, which is stopped from rotating, the ratchet wheel 9 does not rotate, so that the accumulated force of the accumulated coil spring 10 stored so far is not released. Therefore, even if the withdrawal operation of the recoil rope 6 is stopped in the middle as described above, and the withdrawal operation of the recoil rope 6 is performed again, the accumulation force based on the withdrawal operation of the recoil rope 6 remains in the accumulation coil spring 10. Since this is added to the previously accumulated spring force and accumulated, the necessary amount of accumulated force required to start the engine can be obtained by the coil spring 10 for accumulating power even by performing the pull-out operation of the recoil rope 6 a plurality of times. Can be stored.

6 to 8 show a driven part M according to a second preferred embodiment of the present invention.
The follower M is composed of a ratchet wheel 80 having first and second ratchet portions 81 and 82 as in the above-described embodiment. However, in the above-described embodiment, the first and second ratchet portions 8a and 8b are integrally formed. However, in the present embodiment, the first and second ratchet portions 81 and 82 are formed separately, and have a small diameter. The second ratchet part 82 is assembled to the large-diameter first ratchet part 81 so as to be rotatable relative to the first ratchet part 81. And according to this embodiment, the torque limiter means in this invention is distribute | arranged between the said 1st and 2nd ratchet parts 81 and 82. FIG.

A specific configuration of the torque limiter means will be specifically described with reference to FIGS.
In this embodiment, the configuration other than the ratchet wheel 80 is not substantially different from that of the first embodiment. Therefore, in the following description, the structure of the ratchet wheel 80 incorporating the torque limiter means and the torque limiter thereof will be described. Stop to explain the function.

  Similarly to the first embodiment, the ratchet wheel 80 according to this embodiment also includes a first ratchet portion 81 having a large diameter and a second ratchet portion 82 having a small diameter on the same axis. However, in this embodiment, the 1st ratchet part 81 and the 2nd ratchet part 82 are not fixedly integrated, but another body is assembled | attached and integrated so that relative rotation is possible.

  As shown in FIGS. 7 and 8, the large-diameter first ratchet portion 81 is made of an annular plate member having ratchet teeth 81a formed on the outer periphery, and an annular groove portion 81b continuous in the circumferential direction is formed on the inner diameter portion thereof. At the same time, a concave and convex surface 81c is formed on the bottom surface, which continues in the circumferential direction at the same pitch. One small-diameter second ratchet portion 82 has a large-diameter portion 82b and a small-diameter portion 82c integrally formed with a step on the same axis as shown in FIG. 7, and ratchet teeth 82a are formed on the outer peripheral surface of the small-diameter portion 82c. Is formed. The thickness of the large-diameter portion 82b of the second ratchet portion 82 is a dimension that fits slidably into an annular groove portion 81b formed on the inner peripheral surface of the first ratchet portion 81, and is attached to the outer peripheral surface thereof. Are formed with two blind holes 82d extending in the central direction with a phase difference of 180 °. A compression spring 83 is fitted into the blind hole 82d, and a small-diameter steel ball 84 is fitted to the outer diameter side end.

  When the outer peripheral portion of the large-diameter portion 82b of the second ratchet portion 82 is fitted into the annular groove portion 81b of the first ratchet portion 81, the steel ball 84 is urged toward the outer diameter side by the compression spring 83, and the first It is pressed against the uneven surface 81 c formed in the tubular groove 81 b of the ratchet portion 81. When the steel ball 84 is fitted into the concave portion 81c-1 of the concave and convex surface 81c, the first and second ratchet portions 81 and 82 rotate integrally with a required torque difference based on the spring force of the compression spring 83. Or it will come to rotate relative. In this embodiment, in order to reduce the weight of the apparatus, the rotation center portion of the second ratchet portion 82 is thinned to be hollow. Further, in FIG. 6, reference numeral 82e corresponds to the engaging hole 8c shown in FIG. 2 in which the inner end of the energy storing spring housed in a barrel not shown is fitted and fixed. The engagement fixing method and the fixing position are provided on the second ratchet portion 82 and can be provided in various forms without being limited to the form shown in FIG.

  Next, although illustration is omitted, the engine start in the second start mode by the engine start device of the present embodiment will be briefly described with reference to FIGS. 2 and 8 showing the first embodiment. Since the torque limiter means functions in the same manner even when the engine is started in the first start mode, only the engine start in the second start mode will be described here.

  Even in the second embodiment, first, the sliding switching member 16 is operated to lock the engaging claw portion 13a of the bending lever 13 serving as the start timing selection means to the large-diameter first ratchet portion 81. After confirming that the slide type switching member 16 has been switched, the recoil rope 6 is pulled and the recoil reel 7 is driven to rotate. The rotational force of the recoil reel 7 is transmitted to the accumulator ratchet wheel 9, and accumulating force is applied to the accumulator coil spring 10. When the accumulated force reaches a magnitude sufficient to start the engine, a force for releasing the accumulated force of the accumulation coil spring 10 acts on the small-diameter second ratchet portion 82.

  The force to be released is a recess 81c− of the steel ball 84 that is elastically impacted by the spring force of the compression spring 83 on the recess 81c-1 of the uneven surface 81c formed on the inner peripheral surface of the large-diameter first ratchet portion 81. When the impact strength against 1 is exceeded, the steel ball 84 gets over the convex portion 81c-2 of the concave-convex surface 81c. Therefore, in this state, no matter how much the recoil rope 6 is pulled after that, the steel ball 84 only gets over the convex portion 81c-2 of the concave and convex surface 81c, and the small-diameter second ratchet portion 82 only runs idle, and the accumulated power No further power is stored in the coil spring 10. When the steel ball 84 rides over the convex portion 81c-2 of the concavo-convex surface 81c, it makes a surpassing sound each time the steel ball 84 gets over the convex portion 81c-2 of the concave and convex surface 81c. Notify that power has been saved. This eliminates the need for the operator to pull the recoil rope 6 further.

  Thus, when a sufficient stored power is stored in the stored power coil spring 10, the engine can be started anytime. Therefore, after this state is reached, the engine is stopped and the desired work site is visited, and the slide-type switching member 16 is operated at an arbitrary start time on the site, and the engaging claw portion 13a of the bending lever 13 is operated. The locking to the large-diameter first ratchet 81 is released, and the locked state is switched to the unlocked state. By this switching, the engine can be started instantly. Here, in order to prevent the slidable switching member 16 from inadvertently moving, the slidable switching member 16 itself can be released simultaneously with the operation, or a lock mechanism (not shown) cannot be operated unless it is opened. It is advisable to provide an openable lid.

  9 and 10 show a third embodiment of the present invention. Unlike the first and second embodiments described above, this embodiment uses a spring 110 in place of the coil spring 10 for energy storage as a buffering / power storage means. Further, by adopting the mainspring 110, the ratchet wheel 9 and the spring end fixing member 11 for fixing the positioning of the power storage coil spring 10 are eliminated. The specific configuration will be briefly described with reference to FIG. In the figure, members substantially the same as those in the first and second embodiments are given the same reference numerals.

  The engine starting device according to this embodiment is also configured to be housed and installed in the cover case body 2 as shown in FIG. The case body 2 also has a first boss portion 21 projecting toward the crankshaft side. The engine starting members described below are sequentially assembled to the first boss portion 21 and assembled by the set screw 3.

  As in the first embodiment, the rotational drive unit D of the engine starter accommodates the recoil spring 4 whose outer hook end is in contact with the inner surface of the cover case body 2, and the spring 4. 4 with the outer hook end 4 being positioned and fixed in contact with the inner surface of the case body 2, the recoil rope 6 having a handle 61 at one end, and the other end of the recoil rope 6 wound around the peripheral surface. And a recoil reel 7 around which the recoil rope 6 is wound. One rotation follower M includes a ratchet wheel 8 in which first and second ratchet portions 8a and 8b having different diameters are fixedly integrated on a coaxial line. Between the rotation driving unit D and the rotation driven unit M, the buffering / accumulating means in the present embodiment is interposed.

  As shown in FIG. 9, the buffering / accumulating means includes an incense box 119 formed of a circular box and an accumulator mainspring 110 housed in the incense box 119. The barrel 119 is supported so as to be rotatable in one direction by a one-way clutch having a bearing shape (not shown) attached to a first boss portion 21 protruding from a cover case. According to the present embodiment, as shown in an enlarged view in FIG. 10, a plurality of protrusions 119b, which are a part of the torque limiter means of the present invention, are provided at equal intervals on the inner peripheral surface of the housing part 119a of the barrel 119. Has been. The shape of the protrusion 119b is such that the outer hook portion 110a of the energy storage spring 110 is engaged with the outer periphery of the recoil reel 7 along the inner circumferential surface of the housing portion 119a of the barrel 119, and A locking surface 119b-1 is formed to rotate the hook portion 110a in the direction of power storage of the power storage spring 110, and the inner periphery of the housing portion 119a from the apex crossing portion 119b-2 to the rear in the rotation direction during power storage. An inclined surface 119b-3 that is gently inclined downward toward the surface is formed. The inner hook portion 110b of the mainspring 110 is fixed to the back surface portion of the ratchet wheel 8 of the rotation driven portion M that is close to the central cylindrical boss portion (not shown).

  When the barrel 119 is rotated in the direction of energy storage and the required energy is stored in the energy storage spring 110, the outer hook 110a of the spring 110 is released from the engagement with the protrusion 119b. Thus, the outer hook portion 110a gets over the protruding portion 119b, so that the accumulator mainspring 110 is not accumulated even if the barrel 119 rotates further. At this time, if the barrel 119 continues to rotate, every time the outer hook portion 110 of the power storage spring 110 gets over the protrusion 119b, a noise is generated, and the worker is informed that the stored power has reached the required amount. Close.

  On the other hand, ratchet teeth (not shown) are formed on the back surface of the barrel 119 facing the recoil reel 7, and the barrel 9 is moved by the rotation of the driving piece 112 that rotates together with the recoil reel 7. Drives and rotates in the direction of energy storage As shown in FIG. 9, the drive piece 112 has a cylindrical shaft portion 112a and a pair of blade piece portions 112b extending radially from the outer peripheral surface of the cylindrical shaft portion 112a with a phase difference of 180 °. . The blade portion 112b is widened in the radial direction from the center of the cylindrical shaft portion 112a, and at the same time, the side surface in the accumulating direction of the barrel is made thick, and the side surface in the anti-accumulating direction is made thin.

  Further, a projection 7a for positioning the blade portion 112b is provided on the inner surface of the recoil reel 7 on the barrel side. As shown in FIG. 2, four protrusions 7a are provided on the inner surface of the barrel of the recoil reel 7, and the protrusions 7a are arranged in a pair of protrusions for accommodating the blade pieces 112b of the drive piece 112. Two sets of 7a are arranged symmetrically with respect to the rotation center of the recoil reel 7. A pair of blade pieces 112b are accommodated and positioned between the pair of two protrusions 7a. When the recoil reel 7 rotates, the pair of blade pieces 112 b rotate together with the recoil reel 7 with the protrusions 7 a coming into contact with the blade pieces 112 b.

  The driving piece 112 is always pressed against the back surface of the barrel 119 by the compression spring 113, and the thick part of the blade portion 112 b that rotates in the same direction by the rotation of the recoil reel 7 in the accumulating direction is the back side of the barrel 119. Engage with ratchet teeth (not shown) formed in, and rotate the barrel 119 in the direction of accumulation. At this time, the power storage spring 110 housed inside the barrel 119 has its inner hook piece 110b fixed to the ratchet wheel 8 of the driven portion M, and its outer hook portion 110a is the inner circumference of the barrel 119 as described above. The barrel 119 is rotated in the accumulating direction until it is locked by the protrusion 119b formed on the surface and the necessary accumulating power is stored. An open surface on the driven part side of the barrel 119 is closed by an annular cover 120 to restrict the axial movement of the energy storage spring 110 housed therein.

  As described above, the rotation driven portion M includes the ratchet wheel 8 having the first and second ratchets 8a and 8b having a large diameter and a small diameter as in the first embodiment. As described above, the inner hook portion 110b of the power storage spring 110 is fixed to the ratchet wheel 8, and the small-diameter second ratchet 8b has a centrifugal clutch provided on a crankshaft of an engine (not shown). Since the claw is locked, it remains stationary without following the rotation of the barrel 119 in the accumulating direction until the engine is started. In FIG. 9, as in the first embodiment, the engaging claw portion 13 a of the bending lever 13 is engaged with and disengaged from the large-diameter first ratchet 8 a of the ratchet wheel 8 by the switching operation of the slide type switching member 16. .

  The bent lever 13 has a square shape, and a bent portion 13b is pivotally attached to the bottom of the cover case body 2 adjacent to the first boss portion 21 so as to be rotatable. The bending lever 13 includes an engaging claw portion 13a that engages and disengages with the large-diameter first ratchet 8a of the ratchet wheel 8, and a rotation operation portion 13c that rotates the engaging claw portion 13a around the bending portion. Thus, the engaging claw portion 13a is urged in one direction by the torsion coil spring 14 in a direction engaging with the large-diameter first ratchet portion 8a.

  Also in the present embodiment, the slide type switching member 16 is attached to the upper end portion of the cover case 2 so as to be slidable in the left-right direction in FIG. 5 as in the first embodiment. The structure and installation of the slide type switching member 16 are not substantially different from those of the first embodiment. Therefore, when the sliding type switching member 16 is slid in the right direction in FIG. 5, the bending lever 13 is rotated in the clockwise direction, and the engaging claw portion 13 a is a first ratchet portion 8 a having a large diameter of the ratchet wheel 8. Deviate from. Here, by pulling the recoil rope 6 and rotating the recoil reel 7, the barrel 119 is rotated, the spring 10 is stored with sufficient spring force, and the stored force reaches sufficient force to start the engine. Then, a centrifugal clutch (not shown) is rotated via the ratchet wheel 8 of the driven part M to transmit the rotational force to the crankshaft of the engine, and the engine is started.

  On the contrary, when the sliding type switching member 16 on the right side of the cover case 2 is slid to the left side of the cover case 2, the bending lever 13 receives the elasticity of the torsion coil spring 14 and the ratchet wheel 8 becomes large. It is engaged with the diameter ratchet 8a. In this state, when the recoil rope 6 is pulled and the recoil reel 7 is rotated, the barrel 119 can be rotated in the accumulating direction. However, rotation in the opposite direction is prevented by a one-way clutch (not shown) and at the same time the driven part The M ratchet wheel 8 is stopped from rotating at all. Therefore, when the recoil rope 6 is pulled and the recoil reel 7 is rotated, the barrel 119 is rotated and only the accumulated power is stored in the mainspring 110.

  For this reason, even if the pulling operation of the recoil rope 6 is stopped halfway and the hand is released, the accumulated force is maintained between the barrel 119 and the ratchet wheel 8 as it is. Therefore, for example, in a place where a pulling operation by a weak person or a pulling operation of the recoil rope 6 cannot be performed freely, it is sufficient to pull the recoil rope 6 in several times and cause the mainspring 10 to start the engine. After the spring force is stored, the switch-type switching member 16 is slid to the right in FIG. 5 and the bending lever 13 is rotated clockwise, so that the engaging claw portion 13a has a large diameter of the ratchet wheel 8. The engine is instantly started simultaneously with removal from the first ratchet portion 8a. Whether or not the accumulated force stored at this time has reached a sufficient force to start the engine can be surely known from the notification signal generated by the operation of the torque limiter means described above.

  As described above, in this embodiment, the sliding type switching member 16 is slid on the surface of the cover case 2, so that the recoil reel 7 is pulled in the engine rotation direction by the pulling operation of the recoil rope 6 of the rotation drive unit D. The spring 110 stores the required spring force while rotating the barrel 119 of the buffering / accumulating means in the same direction, and directly transmits the accumulated energy to the ratchet wheel 8 as the driven portion M. When the accumulated force reaches a necessary and sufficient force for starting the engine, not only can the engine be automatically started, but also when the slide type switching member 16 is slid in the reverse direction, Pulling the rope 6 and rotating the barrel 119 of the buffering / accumulating means in the same direction causes the accumulator mainspring 110 to store in advance the spring force necessary for starting the engine. It is possible to release the stored power stored in the power storage mainspring 110 at an arbitrary place when desired while maintaining the stored power storage, and to instantly start the engine on the spot. it can.

  As described above, if sufficient energy is stored in the energy storage coil spring 10 to start the engine, in the state where the energy storage is maintained, for example, at the work site in the high place, An operation for simply releasing the locked state by sliding the sliding type switching member 16, which is a constituent member of the starting time selection means, in a direction in which the engaging claw portion 13a of the bending lever 13 is disengaged from the first ratchet portion 8a of the ratchet wheel 8. The engine can be started immediately on the spot. In the above-described embodiment, the slide type switching member 16 is used as a constituent member of the start timing selection means. However, the slide type switching member 16 is not limited to the slide type. For example, a push button type switching member (not shown) is adopted and the pressing operation is performed. It is also possible to engage and disengage the engaging claw portion 13 a of the bending lever 13 with the first ratchet portion 8 a of the ratchet wheel 8.

  As can be understood from the above description, according to the engine starter according to the present invention, in the case of a work site where the recoil rope can be easily pulled out or a work performed by a person with strong arm strength, It is possible to start the engine at a work site where it is difficult to start the engine, or to start the engine when it is difficult to pull out the recoil rope due to weak arm strength. However, the engine can be easily and reliably started at an arbitrary time by a simple selection operation. Further, according to the present invention, it is informed that the necessary and sufficient accumulated power for starting the engine is stored in the buffering / accumulating means by interposing the torque limiter means in the accumulated energy transmission system. Rope pulling operation is eliminated.

It is a cross-sectional view of a small engine provided with the starting device of the present invention. 1 is an exploded perspective view of an engine starter showing a preferred first embodiment of the present invention. It is explanatory drawing which shows the arrangement | positioning relationship at the time of the assembly | attachment of the structural member of the engine starter. It is explanatory drawing which shows the example of an internal structure when the follower part of the engine starting device is in a locked state. It is explanatory drawing which shows the example of an internal structure when the driven part of the same engine starting apparatus exists in an unlocked state. It is an external appearance top view which shows the example of the torque limiter means applied to the engine starting apparatus which is 2nd Embodiment of this invention. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7. It is a disassembled perspective view of the engine starting apparatus which is 3rd Embodiment of this invention. It is the top view which looked at the example of the other torque limit means attached to the embodiment from the barrel opening side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Engine starting device 10 Power storage coil spring 10a Spring main body 10b One end part 10c Other end part 11 Spring end fixing member 11a Ring-shaped disk part 11b Leg part 11c Ratchet surface 13 Bending lever 13a Engaging claw part 13b Bending part 13c times Dynamic operation part 13c 'Hook hole 14 Energizing spring 15 C-shaped link
15a, 15b (one end and the other end) hook part 16 slide type switching member 16a head part 16b slide part 16c hook hole 2 case body 2a slit 21 first boss part 22 second boss part 23 (recoil rope) outlet 3 stop Screw 4 Recoil spring 42a Outer end fixing portion 42b Inner end fixing portion 5 Mainspring case 5a (Spring of mainspring case) insertion hole 51 Center hole 6 Recoil rope 61 Handle 7 Recoil reel 7a Protrusion 71 Flange portion 72 Recoil rope winding portion 73 Central boss part 74 Disk part 74a Engaging hole 75 (for fixing the inner end of the mainspring) Rectangular window 8 Ratchet wheel 8a (on the driven part side) First ratchet part 8b Second ratchet part 8c Engaging hole 80 Ratchet wheel 81 (Large-diameter) first ratchet 81a ratchet teeth 81b annular groove 81c Hole 81c-1 Concave portion 81c-2 Convex portion 82 (small diameter) second ratchet 82a Ratchet teeth 82b Large diameter portion 82c Small diameter portion 82d Blind hole 82e (Inner hook portion of the energy saving spring) Fixing portion 83 Compression spring 84 Steel ball 9 Ratchet wheel 9a body 91 boss portion 92 peripheral wall portion 93 engagement / disengagement claw portion 93a vertical surface 94 pressing spring 100 engine 101 crankshaft 102 fan 103 engine body 104 output shaft 105 engine case 106 operation Handle 106a Throttle lever 110 Power storage spring 110a Outer hook part 110b Inner hook part 112 Drive piece 112a Cylindrical shaft part 112b Wing piece part 113 Compression spring 119 Barrel box 119a (spring) housing part 119b Projection
119b-1 Locking surface
119b-2 Vertex crossing
119b-3 inclined surface 119c ratchet tooth 120 annular cover D drive part M driven part

Claims (7)

A buffering / accumulating means is interposed in a power transmission system between the driving unit and the driven unit having a recoiling mechanism, and the driven unit and the engine are connected via an automatic connecting / disconnecting unit, and the driving unit Power is stored in the buffering / accumulating means arranged between the follower and when the accumulated energy of the buffering / accumulating means exceeds the maximum load of the engine, In an engine starter that is opened and automatically rotates the follower to start the engine,
An engine starter characterized in that the follower is provided with start timing selecting means capable of arbitrarily selecting the start timing of the engine.   When the accumulated force of the buffering / accumulating means reaches the required amount required to start the engine, the follower disables further accumulating by the recoil operation and the accumulated energy reaches the required amount. 2. The engine starter according to claim 1, further comprising torque limiter means for generating a notification signal for recognizing this.   The automatic connection / disconnection means maintains the connection with the driven part until the accumulated power of the buffer / accumulating means exceeds the maximum load of the engine, and stops the rotation of the driven part. 2. An engine according to claim 1, further comprising a connecting / disconnecting mechanism for rotating the driven portion by the stored force when the load is exceeded, starting the engine, and automatically disconnecting from the engine when the engine reaches a predetermined rotational speed. Starter.   The start timing selection means includes a switching operation member for switching between locking / unlocking of the driven portion and an engagement / disengagement member for engaging / disengaging with the engaging portion of the driven portion by the switching operation of the switching operation member. The engine starter according to claim 1 or 2.   The engine starting device according to claim 3, wherein the switching member and the engaging / disengaging member are connected via a link or elastic means.   The follower is composed of a rotating member having a ratchet, the engaging / disengaging member has an engaging / disengaging claw for engaging / disengaging with the ratchet, and the switching operation member is arranged on the case surface of the engine starting device. 6. The engine starting device according to claim 5, wherein the engaging and disengaging claw is engaged with and disengaged from the ratchet by a sliding operation of the sliding switching member.   The follower portion is composed of a rotating member having a ratchet, the engagement / disengagement member has an engagement / disengagement claw for engagement / disengagement with the ratchet, and the switching operation member is a push type switching member arranged on the case surface of the engine starter. 6. The engine starter according to claim 5, wherein the engaging and disengaging claw is engaged with and disengaged from the ratchet by a pressing operation of the push type switching member.

Images