JP2010053916A - Automatically looseness-adjusting device for control cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatically looseness-adjusting device for a control cable capable of performing suitable looseness adjustment. <P>SOLUTION: The automatically looseness-adjusting device 1 for the control cable interposed between an input side control cable 104 and an output side control cable 105 of the control cable 103 and automatically eliminating looseness generated on the control cable is provided with: a connection means 5 for connecting terminal ends of the input side and the output side control cables in such a manner of capable of adjusting a distance between the ends; a looseness measuring means (a protruding member 9 and an E ring 11) for measuring a looseness amount of the control cable from a movement amount when the connection end of the output side control cable is pulled to the input side; and an adjustment means (an adjustment mechanism 30) for adjusting the connection member so as to reduce the distance between the ends of the input side and the output side control cables in accordance with the looseness amount measured by the looseness measuring means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a control cable slack automatic adjustment device, and more particularly to a device for automatically eliminating slack in a control cable used for a side brake or the like of an automobile.

  Conventionally, control cables are used in automobiles as accelerator cables, parking brake cables, hood lock cables, automatic transmission cables, clutch cables, and the like. These cables expand when used for a long period of time, and the amount of operation on the driven device side for a predetermined amount of operation is reduced. Therefore, it was necessary to adjust the slackness at the time of vehicle inspection.

On the other hand, an apparatus has been invented that eliminates slack in the parking brake cable every time the parking brake is operated (for example, Patent Document 1). In the invention of Patent Document 1, a spring is provided at the fixing portion of the cable on the parking lever side which is the operation input means, and the cable is always pulled so as not to be loosened. I am doing so. As another example, an operation load applied to a parking brake lever is measured, and a cable is wound up by driving a motor so as to change the cable length according to the operation load (for example, Patent Document 2).
JP 7-215184 A Japanese Utility Model Publication No. 6-69041

  However, since the device according to Patent Document 1 closes the slack that occurs when the cable is pulled by the parking lever, for example, when the brake is frozen and the cable is not pulled, or when the parking lever is operated suddenly. When there is a delay in pulling the cable by the brake, there is a problem that the cable is packed more than the actual slack. Further, the apparatus according to Patent Document 2 requires a sensor for measuring an operation load and a motor as a drive source, and the apparatus configuration is complicated, so that it is difficult to implement from the viewpoint of cost.

  The present invention has been made in view of the above problems, and an object thereof is to provide an automatic control cable slack adjustment device that can appropriately perform slack adjustment of a control cable without requiring a motor or the like. To do.

  In order to solve the above-mentioned problems, the first aspect of the present invention relates to the input side portion (input side control cable 104 and input side shaft 3) and the output side portion (output side control cable 105 and output side shaft 4) of the control cable (103). And a control cable slack automatic adjustment device (1) that automatically removes slack generated in the control cable between the connecting end of the input side portion and the connecting end of the output side portion. Connecting means (connecting member 5) for adjusting the distance between the ends, and slack for measuring the slack of the control cable from the amount of movement when the connecting end of the output side part is pulled to the input side part side According to the slack measured by the measuring means (the protruding member 9 and the E ring 11) and the slack measuring means, the input side portion and the output side In order to shorten the Tankan distance and minute, and having an adjusting means for adjusting (adjusting mechanism 30) of the connecting means.

  According to this, since the slack amount of the control cable is measured when the control cable is pulled, the slack of the control cable can be accurately measured, and the control cable is not adjusted excessively.

  In a second aspect based on the first aspect, the connection means coaxially connects the input side portion and the output side portion, and has an internal thread portion (5a) at the axis thereof, At least one of the portion and the output side portion has a male screw portion (3c) that is screwed with the female screw portion, and the connecting means rotates around the axis of the control cable, so that the input side portion and the output side portion are The distance between the ends with the output side portion is changed.

  According to this, the distance between the opposing ends of the input side portion and the output side portion is shortened by the rotation of the connecting member, the overall length of the control cable is shortened, and the slack is removed.

  According to a third invention, in the first invention or the second invention, the slack measuring means includes a casing (2) fixed to a member (vehicle body frame 200) serving as a reference for movement of the control cable, and the casing One end of which is engaged with a projecting member (9) projecting from the casing and fixed to the output side portion, and the connecting end of the output side portion is on the input side portion side A pressing portion (E-ring 11) that abuts against the projecting member and moves the projecting member to the input side portion side when the amount of movement when pulled increases from a predetermined amount due to loosening of the control cable The protrusion member is only allowed to move toward the input side portion. The projecting member is fixed to the casing via, for example, a ratchet mechanism, and only allowed to move to the input side portion side.

  According to this, the slack of the control cable can be measured by the protruding amount of the protruding member toward the input side portion. Further, since the protruding member is allowed to move only in the protruding direction, the other member can be pressed at the protruding end.

  In a fourth aspect based on the third aspect, the protruding member has a male screw portion (9a) screwed into the casing and has a through-hole (9c) into which the output side portion is fitted and inserted in the center thereof. It is characterized by that.

  According to this, the protruding member can have a simple structure.

  In a fifth aspect based on the third aspect or the fourth aspect, the adjusting means includes a contact portion (plate-like portion 10a) that contacts the other end of the protruding member, and extends from the contact portion. And a rack member (10d) having a rack portion (10d), and a pinion (23) that meshes with the rack portion and rotationally drives the connecting means by rotation thereof.

  According to this, it is possible to convert the displacement in the linear direction, that is, the protrusion of the protruding member, into a rotational force and to drive the connecting means.

  By configuring as described above, it is possible to appropriately measure the slack of the control cable without providing an additional device such as a motor or a sensor, and to remove the slack of the control cable without excessive adjustment. .

  Hereinafter, an embodiment in which the present invention is applied to a parking brake device for a vehicle will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram illustrating a parking brake device to which a control cable slack automatic adjusting device according to an embodiment is applied. The upper side in FIG. 1 is the upper side, the right side is the front side, and the left side is the rear side. As shown in FIG. 1, the parking brake device 100 is a device that operates a known drum brake 102 by operating a parking lever 101, and the parking lever 101 and the drum brake 102 are connected by a control cable 103.

  The control cable 103 is divided into two parts: an input side control cable 104 whose one end is connected to the parking lever 101 and an output side control cable 105 whose one end is connected to the drum brake 102. Between the input side control cable 104 and the output side control cable 105, the control cable slack automatic adjustment device 1 is interposed.

  The slack automatic adjusting device 1 includes a rectangular parallelepiped casing 2 fixed to a vehicle body skeleton 200, an input side shaft 3 protruding from the front end surface of the casing 2, and a coaxial projection with the input side shaft 3 from the rear end surface of the casing 2. The output side shaft 4 is provided. An input side control cable 104 is connected to the end of the input side shaft 3, and an output side control cable 105 is connected to the end of the output side shaft 4. The input side shaft 3 and the output side shaft 4 are connected to each other by a connecting member 5 described later in the casing 2. The input side shaft 3 and the output side shaft 4 are supported so as to be movable in the axial direction with respect to the casing 2, and the operation of the parking lever 101 is transmitted to the drum brake 102 via the control cable 103. Yes.

  The drum brake 102 includes a cylindrical drum 111, a pair of shoes 112 disposed to face the inner surface of the drum 111, a shoe lever 113 and a shoe strut 114 for displacing the shoe position by an operation input. Yes. The output side control cable 105 is connected to a shoe lever 113 and is always urged toward the drum brake 102 by a spring 115. As a result, when no tensile force is applied by the parking lever 101 (solid line in FIG. 1), the lining 116 attached to the surface of the shoe 112 is separated from the drum 111, while the tensile force is applied by the parking lever 101. In this case (the broken line in FIG. 1), the shoe 112 is displaced and the lining 116 contacts the drum 111 to generate a braking force.

  Hereinafter, the slack automatic adjustment device 1 will be described in detail. FIG. 2 is a perspective view showing an automatic adjustment device for a parking brake cable slack, and FIGS. 3 and 4 are perspective views showing a partially broken automatic adjustment device for a parking brake cable. As in FIG. 1, the upper side in FIGS. 2 to 4 is the upper side, the right side is the front and the left side is the rear along the axis of the input side shaft 3 and the output side shaft 4. As shown in FIGS. 2 to 4, the casing 2 is opened to the lower side, and a flange portion 2 a for joining to the vehicle body skeleton is formed at the peripheral portion thereof. A slit 6 is formed on the upper surface in parallel with the axis of the input side and output side shafts 3 and 4.

  As shown in FIGS. 3 and 4, the input side shaft 3 passes through a through hole 7 formed in the front surface of the casing 2 and extends inward of the casing 2. As shown in FIG. 4, the rear end portion of the input side shaft 3 is provided with a small-diameter portion 3a having a smaller diameter than the other portions, and a step portion is provided at the boundary between the small-diameter portion 3a and the other portions. Part 3b is formed. A male screw portion 3 c is formed at the tip of the small diameter portion 3 a of the input side shaft 3. Further, a protrusion 3d extending in the axial direction is formed on the outer peripheral surface of the portion on the front side of the step portion 3b of the input side shaft 3, and a groove 7a that engages with the protrusion 3d is formed in the through hole 7 in the axial direction. It is formed along. Thereby, the input side shaft 3 can advance and retreat in the axial direction (front-rear direction) with respect to the through-hole 7, while the rotation about the axis is restricted.

  The output side shaft 4 extends forward through a female screw hole 8 formed on the rear surface of the casing 2, a protruding member 9 screwed into the female screw hole 8, and a rack member 10. A groove 4b extending in the circumferential direction is formed on the outer side of the casing 2 of the output side shaft 4, and an E-ring 11 as a pressing member is attached to the groove 4b. The protruding member 9 and the E ring 11 constitute a slack measuring means.

  The female screw hole 8 is formed coaxially with the through hole 7. The protruding member 9 includes a male screw portion 9a that is screwed into the female screw hole 8, and a flange portion 9b that is provided at an end of the male screw portion 9a on the inner side of the casing 2. A through hole 9c is formed in the male screw portion 9a and the flange portion 9b along the axis, and the output side shaft 4 is fitted into the through hole 9c. FIG. 5A is a perspective view showing a protruding member. As shown in FIG. 5A, radial protrusions 9d are formed on the front surface of the flange portion 9b.

  FIG. 5B is a perspective view showing the rack member. As shown in FIG. 5B, the rack member 10 has a through hole 10 b into which the output side shaft 4 is inserted and formed in the plate-like portion 10 a that contacts the flange portion 9 b of the protruding member 9. The protrusions 10c are formed radially from the peripheral edge of 10b. Further, a rack portion 10d on which a rack is formed is extended to the front side on a portion of the plate-like portion 10a opposite to the surface on which the protrusions 10c are formed.

  As shown in FIGS. 3 and 4, the opposing ends of the input side shaft 3 and the output side shaft 4 are connected by a connecting member 5. The connecting member 5 is a substantially cylindrical member disposed coaxially with the input side and output side shafts 3 and 4, and has an internal thread portion 5 a that engages with the external thread portion 3 c of the input side shaft 3 on the inner peripheral surface thereof. Is formed. The input side shaft 3 side of the connecting member 5 is open, while the other output side shaft 4 side is formed with a bottom portion 5c having a through hole 5b through which the output side shaft 4 can be inserted.

  A head portion 4 a having a diameter larger than that of the through hole 5 b of the connecting member 5 is provided at the distal end portion of the output side shaft 4. The output side shaft 4 is connected to the connecting member 5 by engaging the head portion 4a with the bottom portion 5c. The input side shaft 3 is connected to the connecting member 5 by the male screw portion 3 c being screwed with the female screw portion 5 a of the connecting member 5. The connecting member 5 is rotatable relative to the input side shaft 3 and the output side shaft 4 around the axis, and the input side shaft 3 can be screwed by rotating. Therefore, the distance between the tips of the input side shaft 3 and the output side shaft 4 can be changed by rotating the connecting member 5.

  As shown in FIG. 4, the front end of the connecting member 5 is accommodated in a cylindrical member 21 having a bottomed cylindrical shape provided coaxially with the connecting member 5 and the input side shaft 3. The cylindrical member 21 has a bottom portion 21a at the front end, and a through hole 21b is formed in the bottom portion 21a so as to be in sliding contact with the outer periphery of the small diameter portion 3a of the input side shaft 3. In addition, a first bevel gear 21 c is formed on the outer side in the radial direction of the rear end portion of the cylindrical member 21.

  The cylindrical member 21 is pivotally supported by the small diameter portion 3a of the input side shaft 3 in the through hole 21b, and the inner wall 21d of the cylindrical member 21 is pivotally supported by the connecting member 5 by being in sliding contact with the outer peripheral portion 5d of the connecting member 5. . A protrusion 5 e is formed on the outer peripheral portion 5 d at the front end of the connecting member 5, and a guide groove 21 e that engages with the protrusion 5 e extends along the axial direction of the cylindrical member 21 on the inner wall 21 d of the cylindrical member 21. Has been. As a result, the connecting member 5 is movable relative to the cylindrical member 21 in the axial direction of the cylindrical member 21, while the cylindrical member 21 is centered on the axial line of the cylindrical member 21 by the engagement between the protrusion 5 e and the guide groove 21 e. It rotates together with the member 21. The cylindrical member 21 is rotatable relative to the input side shaft 3 around the axis of the input side shaft 3.

  An adjustment mechanism casing 20 is pivotally supported on the connecting member 5 and the small diameter portion 3 a of the input side shaft 3. The adjustment mechanism casing 20 is a casing that forms a skeleton of the adjustment mechanism 30 that transmits the driving force applied to the rack member 10 by the displacement of the protruding member 9 as the rotational force of the connecting member 5. The adjustment mechanism casing 20 has a box shape that opens downward and bulges upward on the upper side. A through hole 20b is formed in the lower rear wall 20a, and a through hole 20d is formed in the lower front wall 20c. The connecting member 5 is inserted into the through hole 20b, and the small diameter portion 3a of the input side shaft 3 is inserted into the through hole 20d. The adjustment mechanism casing 20 is disposed so that the cylindrical member 21 is sandwiched between the lower rear wall 20a and the lower front wall 20c.

  A groove 3e extending in the circumferential direction is formed in the small diameter portion 3a of the input side shaft 3, and an E-ring 12 is engaged with the groove 3e. Thereby, the bottom 21a of the cylindrical member 21 and the lower front wall 20c of the adjustment mechanism casing 20 are sandwiched between the step 3b of the input side shaft 3 and the E ring 12, and the cylindrical member 21 and the adjustment mechanism casing 20 are placed on the input side. It moves in the axial direction of the input side shaft 3 together with the shaft 3.

  On the upper side of the adjustment mechanism casing 20, a second bevel gear 22 that meshes with the first bevel gear 21 c of the cylindrical member 21 and a second bevel gear 22 that are coaxially and integrally provided and mesh with the rack portion 10 d of the rack member 10. A pinion 23 is accommodated.

  The second bevel gear 22 and the pinion 23 are fixed to a single shaft 24. The shaft 24 includes a head portion 24a having a flange portion at one end, and is fitted into a through hole 20f formed in the upper upper wall 20e of the adjustment mechanism casing 20 and a through hole 20h formed in the upper lower wall 20g. The E-ring 25 is attached to the end 24b on the side, so that the adjustment mechanism casing 20 is pivotally supported. Further, the end 24 b of the shaft 24 protrudes outward from the adjustment mechanism casing 20 and is fitted into the slit 6 of the casing 2. Thereby, the attitude | position in the casing 2 of the adjustment mechanism casing 20 is stabilized.

  A through hole 20j is formed in the upper rear wall 20i of the adjustment mechanism casing 20, and a through hole 20l is formed in the upper front wall 20k. The rack portion 10d of the rack member 10 is inserted therethrough. Accordingly, the rack portion 10d can be engaged with the pinion 23, and the engagement is reliably performed by restricting the moving direction of the rack portion 10d.

  The operation of the slack automatic adjusting device 1 configured as described above will be described. FIGS. 6 to 10 are longitudinal sectional views showing the operation state of the automatic adjustment device for the parking brake cable slack, and are a diagram showing a series of operations. Similar to FIG. 1, the upper side of FIGS. 6 to 10 is the upper side, the right side is the front, and the left side is the rear. FIG. 6 shows an initial state of the slack automatic adjusting device 1. The initial state refers to a state where the input side control cable 104 and the output side control cable 105 are not slack and the pulling by the parking lever 101 is minimum (released state, brake off). Since the output side control cable 105 is urged by the spring 115, the output side shaft 4, the connecting member 5, the adjustment mechanism casing 20, and the input side shaft 3 are urged toward the drum brake 102 side (rear side). Yes. The position of the output side shaft 4 and the like in the initial state is determined by a position (release position) at which pulling by the parking lever 101 is minimized. In addition, you may implement the movement restriction | limiting to the rear side of the output side shaft 4 etc. by providing another stopper. The tip position of the input side shaft 3 in FIG. 6 is defined as a reference position P0.

  In the initial state, the rack portion 10 d of the rack member 10 protrudes by a predetermined amount outward from the adjustment mechanism casing 20, and the male screw portion 9 a of the protrusion member 9 protrudes by a predetermined amount outward from the casing 2. At this time, the flange portion 9b of the protruding member 9 and the plate-like portion 10a of the rack member 10 are in contact with each other, but are not pressed against each other. Further, the distance between the ends of the input side shaft 3 and the output side shaft 4 in the initial state is D1.

  The E ring 11 is located at a distance L from the end 9 e of the male thread 9 a of the protruding member 9. The distance L is determined when the output side shaft 4 moves from the released state (brake off) to the pulled state (brake on) of the parking lever 101 when the input side and output side control cables 104 and 105 are not slackened. It is distance to do. In another embodiment, the distance between the E-ring 11 and the end 9e may be slightly longer than the distance L.

  FIG. 7 shows a state where the input side control cable 104 is pulled forward by a distance L by operating the parking lever 101 from the initial state shown in FIG. When the input side control cable 104 is pulled forward, the input side shaft 3, the connecting member 5, the output side shaft 4, and the adjustment mechanism 30 are moved forward by a distance L. At this time, the E-ring 11 moves to a position where it contacts the end 9e of the protruding member 9. When the output side control cable 105 is not slack, the shoe lever 113 of the drum brake 102 is displaced by a predetermined amount in the state shown in FIG.

  On the other hand, when the output side control cable 105 is slackened, the output side shaft 4 and the like are further moved forward by a distance ΔL corresponding to the slack amount in order to displace the shoe lever 113 by a predetermined amount to bring the brake on. Need to pull to the side. FIG. 8 shows a state where the output side shaft 4 and the like are pulled forward by a distance ΔL from the state of FIG. When the output side shaft 4 moves forward by the distance ΔL, the E ring 11 presses the end 9e of the protruding member 9 forward. As a result, the protruding member 9 is screwed forward by a distance ΔL in the female screw hole 8 while rotating around the axis. In this state, the tip position of the input side shaft 3 has moved to the front side by the distance L + ΔL from the state at the reference position P0 in FIG.

  Next, when the pulling by the parking lever 101 is released from the brake-on state of FIG. 8, the output side control cable 105 is urged by the spring 115, so that the output side shaft 4 and the like are pulled rearward. FIG. 9 shows a state in which the output side shaft 4 and the like have moved rearward by a distance L from the state of FIG. In this state, the plate-like portion 10a of the rack member 10 and the flange portion 9b of the protruding member 9 come into contact with each other, and the protrusions 10c and 9d formed on the portions 10a and 9b are engaged with each other.

  From the state shown in FIG. 9, the output shaft 4 and the like are further pulled rearward by the urging force of the spring 115. At this time, the rack member 10 about to move together with the output side shaft 4 presses the protruding member 9 backward. However, since the protruding member 9 is engaged with the rack member 10 and rotation around the circumferential direction of the axis is restricted, the protruding member 9 cannot move in the female screw hole 8. Therefore, the positions of the protruding member 9 and the rack member 10 are fixed at the positions shown in FIG.

  Since the position of the rack member 10 is fixed, when the adjusting mechanism casing 20 moves rearward under the biasing force of the spring 115, the pinion 23 that meshes with the rack portion 10d is rotated. When the pinion 23 rotates, the second bevel gear 22 that rotates integrally with the pinion 23 is rotated, the cylindrical member 21 is rotated together with the first bevel gear 21 c that meshes with the second bevel gear 22, and rotates integrally with the cylindrical member 21. The connecting member 5 is rotated. When the connecting member 5 rotates with respect to the input side shaft 3, the male screw portion 3 c of the input side shaft 3 is screwed with respect to the female screw portion 5 a of the connecting member 5. As a result, the connecting member 5 moves forward and enters the inside of the cylindrical member 21.

  FIG. 10 shows a state in which the rearward movement of the output side shaft 4 or the like is completed. As shown in FIG. 10, when the tip of the input side shaft 3 reaches the reference position P0, the rearward movement of the output side shaft 4 and the like is completed. In the state in FIG. 10, the position of the head 4a of the output side shaft 4 moves forward by a distance ΔL compared to the position before the series of operations in FIG. 6, and the input side shaft 3 and the output side shaft 4 The end-to-end distance between is D1-ΔL. Thereby, the distance between the terminals of the input side control cable 104 and the output side control cable 105 in which the slack automatic adjusting device 1 is interposed, that is, the total length of the control cable 103 is shortened by a distance ΔL corresponding to the slack amount. In other words, the control cable 103 is stretched and the slack is eliminated.

  The rack portion 10d and the pinion 23, and the pinion 23 and the second bevel gear 22 are reduced to the extent that the end-to-end distance between the input side shaft 3 and the output side shaft 4 with respect to the looseness of the input side control cable 104 and the output side control cable 105 is reduced. , And by changing the gear ratio of the second bevel gear 22 and the first bevel gear 21c. In the embodiment, the end-to-end distance is shortened by ΔL with respect to the slack amount ΔL. However, in other embodiments, the end-to-end distance can be shortened by a value shorter than ΔL.

  As described above, the slack automatic adjustment device in the embodiment automatically measures the slack of the control cable 103 every time the parking brake device 100 is used, and shortens the distance between the ends of the control cable 103 according to the slack. Can be resolved.

  Since the amount of slack is measured when the parking lever 101 is pulled, the distance between the ends of the control cable 103 can be shortened while reducing disturbance due to the operation. When the parking lever 101 is pulled, the control cable 103 is always pulled against the urging force of the spring 115, so that force is applied to the control cable 103 in both directions, and the control cable 103 is in a tensioned state. It is.

  Although the description of the specific embodiment is finished as above, the present invention is not limited to the above embodiment and can be widely modified. For example, in the embodiment, the male screw portion is provided at the tip of the input side shaft 3, but the male screw portion is provided at the tip of the output side shaft 4 so that the output side shaft is screwed inward of the connecting member 5. May be provided. Further, the engagement between the protruding member 9 and the female screw hole 8 may be performed by a ratchet mechanism, and the protruding member 9 may be movable only to the front side. In this case, the screw engagement between the protruding member 9 and the female screw hole 8 can be omitted, and the protrusion 9d of the protruding member 9 and the protrusion 10c of the rack member 10 can be omitted. Other configurations of the control device can be appropriately changed without departing from the spirit of the invention.

It is the schematic which shows the slack automatic adjustment apparatus of the parking brake cable which concerns on embodiment. It is a perspective view which shows the slack automatic adjustment apparatus of a parking brake cable. It is a perspective view which shows a partially broken parking slack cable automatic adjustment device. It is a perspective view which shows a partially broken parking slack cable automatic adjustment device. It is a perspective view which shows (a) protrusion member and (b) rack member. It is a longitudinal cross-sectional view which shows the operation | movement condition of the slack automatic adjustment apparatus of a parking brake cable. It is a longitudinal cross-sectional view which shows the operation | movement condition of the slack automatic adjustment apparatus of a parking brake cable. It is a longitudinal cross-sectional view which shows the operation | movement condition of the slack automatic adjustment apparatus of a parking brake cable. It is a longitudinal cross-sectional view which shows the operation | movement condition of the slack automatic adjustment apparatus of a parking brake cable. It is a longitudinal cross-sectional view which shows the operation | movement condition of the slack automatic adjustment apparatus of a parking brake cable.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automatic adjustment apparatus 2 Casing 3 Input side shaft 3c Male thread part 4 Output side shaft 4a Head part 5 Connection member 5c Female thread part 8 Female thread hole 9 Protruding member 10 Rack member 11 E ring 10d Rack part 21 Cylindrical member 23 Pinion 30 Adjustment mechanism 100 Parking brake device 101 Parking lever 102 Drum brake 103 Control cable 104 Input side control cable 105 Output side control cable

Claims (5)

A control cable slack automatic adjustment device that is interposed between an input side portion and an output side portion of a control cable and automatically removes slack generated in the control cable,
A connecting means for connecting the connecting end of the input side portion and the connecting end of the output side portion so that the end-to-end distance can be adjusted;
Slack measuring means for measuring the slack of the control cable from the amount of movement when the connecting end of the output side portion is pulled toward the input side portion;
A control cable comprising adjusting means for adjusting the connecting means so as to shorten a distance between the input side portion and the output side portion in accordance with the slack measured by the slack measuring means. Automatic slack adjustment device. The connecting means connects the input side portion and the output side portion coaxially, and has a female screw portion at the axial center thereof,
At least one of the input side portion and the output side portion has a male screw portion that is screwed with the female screw portion,
2. The slack of a control cable according to claim 1, wherein the connecting means changes an end-to-end distance between the input side portion and the output side portion by rotating around an axis of the control cable. Automatic adjustment device. The slack measuring means is:
A casing fixed to a member serving as a reference for movement of the control cable;
A projecting member that engages with one side of the casing so as to be able to advance and retreat in the axial direction, and has one end projecting from the casing,
When the movement amount when the connecting end of the output side portion is pulled to the input side portion side is fixed to the output side portion and the control cable is loosened, the projecting member A pressing portion that contacts and moves the protruding member to the input side portion side,
3. The control cable slack automatic adjustment device according to claim 1, wherein the protruding member is allowed to move only toward the input side portion. 4.   4. The automatic adjustment of the slack of the control cable according to claim 3, wherein the projecting member is screwed into the casing with a male screw portion and has a through-hole into which the output side portion is inserted and inserted in the axis thereof. apparatus. The adjusting means includes
A rack member comprising a contact portion that contacts the other end of the protruding member, and a rack portion that extends from the contact portion;
5. The control cable slack automatic adjustment device according to claim 3, further comprising a pinion that meshes with the rack portion and rotationally drives the coupling means by rotation thereof. 6.

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