JP2018127776A - Closer for sliding door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a closer that can smoothly release a lock at a position where a trigger cam catches a trigger even when a sliding door is swiftly opened/closed and prevents unnatural movement of the sliding door.SOLUTION: To hold a lock state in which a relative movement between a trigger cam 5 and an outer case 3 is prevented, by causing an ear portion 5b of the trigger cam 5 to enter a recess 2c provided in a roller holder 2b with a force of a spring of a pushing spring 6. In addition, the recess 2c is provided with an inclined surface 2d having an inclination angle at which the ear portion 5b is prevented from being caught tight when the ear portion 5b escapes. The relative movement of the outer case 3 together with the sliding door moves relative to the trigger cam 5 in an unlock state which is retained in the trigger, and such movement is buffered by a damper 8 when the ear portion 5b escapes from the recess 2c by a rotation of the trigger cam 5a which is abutted against a trigger fixed to the sliding door rail.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sliding door closer having a buffering function that prevents a sudden closing / opening of a hanging type sliding door.

  In recent years, an increasing number of sliding doors have been provided with a closer from the viewpoint of improving safety and ensuring quietness so that the opening and closing speed between the vicinity of the opening and closing end point is gradually changed. The same applies to the hanging type sliding door.

  Examples of conventional techniques for the hanging type sliding door closer include those disclosed in Patent Documents 1 to 3 below.

  The closer (door closing device) of Patent Document 1 is provided with hook members pivotally supported at the base end of a cylinder portion and a tip end of a piston rod constituting a buffer damper, and the locking protrusions of the hook members are provided at both ends of a rod-shaped casing. It is locked in the locking groove.

  When the hook member hits a fixed protrusion (trigger referred to in the present application) provided on the sliding door rail by the movement of the sliding door, the hook member is released from the engagement groove (locked). As a result, the rod-like casing slides relative to the hook member held by the fixed protrusion by the force of the tension elastic body provided between the two hook members.

  The slide of the rod-shaped casing at this time is decelerated by the action of the buffer damper, so that the door connected to the rod-shaped casing is slowly closed.

  Moreover, the closer of patent document 2 has the to-be-captured member each provided in the open side and closed side of the sliding door rail (fixed member), and the capture drawing-in mechanism attached to a sliding door.

  The capture pull-in mechanism has a first catch portion on one end side of a guide portion that travels along the sliding door rail, and a second catch portion on the other end side.

When the first catch portion and the second catch portion are not capturing the captured member on the corresponding side, the relative movement in the door opening / closing direction with the guide portion is locked, and when the captured member is captured The lock is released.

  Thereby, relative movement in the door opening / closing direction of the guide portion with respect to the captured catch portion is allowed, and the guide portion is opened / closed by the force of the tension elastic body provided between the first catch portion and the second catch portion. Slide in the direction. The slide is decelerated by the action of the buffer damper, and the door hung on the guide part is closed slowly.

  The closer of Patent Document 3 includes a member to be captured (also referred to as a trigger in the present application) provided on the sliding door rail, and a capture pull-in mechanism attached to the sliding door. As with the closer of Patent Document 2, when the captured member is not captured, the capture retracting mechanism locks the relative movement in the door opening / closing direction with the outer case (similar to the guide portion of Patent Document 2). When the capture member is captured, the lock is released.

  As a result of the release, the outer case slides with the force of the retracting spring against the capture member that has captured the captured member, and the slide is decelerated by the action of the buffer member so that the door hung on the outer case closes slowly. It has become.

JP 2009-127293 A JP 2013-170415 A Japanese Patent Laid-Open No. 2006-8382

  In the closer of Patent Document 1, when the hook member on the side that releases the locked state is strongly hit against the fixing protrusion when the door is opened and closed vigorously, the hook member on the side that should maintain the locked state is impacted by the impact from the locking groove. It may come off and unlock.

  Further, the locked state of the hook member (the locked state of the hook member with respect to the locking groove) is maintained using the force of the tensile elastic body, but when the door is opened and closed with force, the tensile elastic body A situation in which the opening / closing speed cannot be followed occurs, and the locked hook member can no longer be maintained, and the locked hook member may rotate by its own weight and come out of the locking groove.

  In addition, when the door is opened and closed with force, the hook member comes into contact with and disengages from the fixed protrusion, and an engagement sound and a disengagement sound are generated.

  In addition to the above problems, if the door is opened and closed vigorously and the hook member contacts the fixed protrusion at a high speed, the escape speed of the hook member's locking protrusion from the locking groove cannot catch up and resistance to the movement of the door. It is also conceivable that a situation occurs in which the door stops for a moment due to joining, or the hooking member comes out so as to be flipped from the locking groove and the hook member hits the fixed protrusion with an impact sound.

  In the closer of Patent Document 2, the first catch portion and the second catch portion of the capture pull-in mechanism are configured by combining three movable members (an inclusion block, a capture member, and an abutment block). The structure and movement are complicated.

  For this reason, it may be difficult to ensure the durability of the catch portion and to maintain a smooth operation over a long period of time.

  In the closer of Patent Document 3, the capture pull-in mechanism is configured by combining a movable block disposed in the slide case and a capture protrusion for capturing a captured member provided on the sliding door rail.

  In this closer, the catching projection is provided on the upper surface of the movable block, and the catching projection is guided by the catching groove of the trapped member to move the movable block in the thickness direction of the sliding door and in the opening / closing direction.

  For this reason, when the catching projection is guided to the catching groove, a rotational moment (force to tilt) is applied to the movable block, which causes the movement of the movable block to deteriorate gradually or damage the movable block. May be promoted.

  The present invention has been made in view of the above-described state-of-the-art technology, and locks even when the sliding door is opened and closed vigorously (preventing relative movement of the outer case that moves with the trigger cam and the sliding door). The purpose of this is to smoothly release the sliding door to prevent the sliding door from feeling uncomfortable, and to suppress the malfunction and operation sound of the trigger cam.

  In addition, when the trigger cam should be locked to the door carriage holder, when a situation occurs where the trigger cam is not locked, a mechanism that returns the locked state by opening / closing the sliding door, or a pulling mechanism that pulls the sliding door A mitigation measure for sound generated when a spring (an elastic body or a spring member referred to in Patent Literature) expands or contracts is also provided.

In order to solve the above problems, in the present invention, the sliding door closer is configured as follows.
A trigger fixed to the sliding door rail, a door wheel connected to the sliding door and traveling on the sliding surface of the sliding door rail when the sliding door is opened and closed, and an outer case in which a door wheel holder equipped with the door wheel is attached to the front part and the rear part, A cam holder supported by the outer case so as to be slidable in the sliding door opening / closing direction, a trigger cam supported by the cam holder so as to be pivotable about a horizontally-arranged support shaft, and biasing the trigger cam in one direction A pushing spring, a pulling spring that relatively moves the trigger cam and the outer case in the sliding door closing direction, and a damper that adds resistance to the relative movement caused by the force of the pulling spring between the trigger cam and the outer case,
The trigger cam enters an indentation provided in the door roller holder and is prevented from moving in the sliding door opening / closing direction by the indentation, an abutting surface that abuts against the trigger, and the ear from the indentation A capture space for the trigger to enter when it escapes,
Holding of the state of entering the concave portion of the ear portion is made by the force of the push spring,
The concave portion includes a slope having an inclination angle at which the ear cam portion is prevented from being tightly caught on the side where the trigger cam is pulled by the pull spring.
When the sliding door moves further in the direction of the closing end point from the position where the contact surface is in contact with the trigger, the trigger cam is rotated about the support shaft, and the rotation causes the ear portion to be Escape from the recess and the lock is released,
Accordingly, the door roller holder and the outer case travel in the direction of the closing end point of the sliding door by the force of the pulling spring.

  In the present invention, the state where the relative movement of the outer case and the trigger cam in the sliding door opening / closing direction is blocked is considered as “locked state”, and the state where the blocking of the relative movement is released is referred to as “unlocked state”. .

  Such a closer can be used not only for buffering the closing operation of the sliding door but also for buffering the opening operation.

  The opening operation buffer is a closing operation buffer that consists of the same components as the closing operation closing closer (cam holder, trigger cam, recess for inserting the ear of the trigger cam, push spring, and trigger). This can be achieved by adding it to the rear side of the outer case in the opposite direction to the closer.

  The pulling spring of the closing door for the closing operation of the sliding door and the damper can be used in combination as the damper for applying relative resistance to the opening spring and the pulling spring for moving the outer case relative to the opening direction of the sliding door.

  The sliding door closing side trigger cam and the opening side trigger cam are cams having the same structure, although the mounting directions are different. The “trigger cam” referred to below refers to the two.

  The open operation buffer closer is provided as necessary and is not essential.

  The door wheel may be grooved or non-grooved. It is preferable that the door roller holder having the grooved door wheel and the door wheel holder having the grooveless door wheel are detachably attached to the outer case with a common design of the connecting portion to the outer case.

  The door roller holder may be provided with a protrusion that supports the door roller holder together with the door wheel in contact with the track surface of the sliding door rail near the trigger cam when the closer is bent by receiving a pressing force.

  The damper is preferably a hydraulic damper, but is not limited thereto.

  It is preferable that the damper is housed in a damper case, the pulling springs are installed outside both sides of the damper case, and the trigger cam and the outer case are relatively moved in the closing direction of the sliding door by the force of the left and right pulling springs.

  In addition, the closer according to the present invention is an error that causes the sliding door to return to the locked state when the relative movement between the trigger cam and the outer case should be locked and when the unlocked state occurs. A thing provided with an operation return mechanism is preferred.

  The malfunction return mechanism includes an error release cam that is rotatable about a support shaft provided on the trigger cam, and an error release cam that is retracted between the error release cam and the trigger cam. The force applied to the trigger cam in the opposite direction (unlock direction) to the direction in which the trigger cam is rotated by the push spring (in the present invention, this is referred to as the “lock direction”). A weak second push spring is provided.

  The error release cam has a cam surface that is pushed down by the trigger when the sliding door moves toward the closing end point or the opening end point, and a second position when the sliding door moves backward by passing the trigger installation point by pushing down the cam surface. It has a first protrusion that returns to its original position by the force of the push spring and is held by the trigger, and a second protrusion that enters a hole provided in the outer case at a position where the ear portion of the trigger cam enters the recess.

  The error release cam rotates in the locking direction by the force of the second push spring when the second protrusion enters the hole, thereby releasing the retention of the first protrusion by the trigger. The ear portion of the trigger cam enters the recess and the malfunction state of the trigger cam is repaired.

  In the case where the door opening cushioning closer is installed, the error release cam may be included in the opening cushioning closer.

  The closer according to the present invention may be one in which the tension spring is housed in a resin tube in a loosely fitted state as a measure for mitigating the sound generated when the tension spring expands and contracts. The cylinder made of resin has a length that does not hinder the expansion and contraction of the tension spring, for example, the length obtained by adding the extra length necessary for assembly to the length of the tension spring when the tension spring contracts to the maximum Use the one with the maximum length.

  The closer for a sliding door according to the present invention maintains the state of entering the recess of the ear portion of the trigger cam with the force of the push spring, so that the slope of the recess is inclined so that the hook portion of the trigger cam does not get caught tightly. It can be a surface with corners.

  By providing such a slope, the resistance feeling when the ear part comes out of the recess is reduced, and the repelling sound that makes the switching from the locked state to the unlocked state uncomfortable both when opening and closing the sliding door It is made smoothly without a large disengagement sound or impact sound.

  In addition, since the force of the push spring is used to maintain the locked state of the trigger cam ears in the recess, that is, the locked state can be naturally released even if the trigger cam hits the trigger strongly. And stable operation.

  Further, a mechanism corresponding to the capture and retraction mechanism of Patent Documents 2 and 3 includes a trigger cam that is supported by the cam holder and moves in a simple manner, a push spring that biases the trigger cam in one direction, and a doorwheel holder. It is comprised by the provided recessed part, The mechanism is simple and a movement is also simple.

  Therefore, the durability of the closer is improved, and smooth operation can be maintained for a long time.

  If the door holder is provided with a projection that contacts the track surface of the sliding door rail near the trigger cam and supports the door holder together with the door roller when the closer is bent by the pressing force, It is prevented that the combination becomes unstable.

  The contact surface of the trigger cam hits the trigger, and the further movement of the sliding door thereafter causes the trigger cam to rotate in the unlocking direction so that the ear portion escapes from the recess.

  Then, the trigger enters the capture space provided in the trigger cam by the rotation of the trigger cam to the unlocking point. Due to the entry, the trigger cam is retained by the trigger.

  At this time, a force that momentarily pushes the closer downward is applied. Similarly, when the trigger leaves the capture space of the trigger cam, a force that pushes downward is applied.

  It can be considered that the outer case and the door roller holder are bent by the force. When the contact surface is released from the trigger due to the bending, the trigger cam is released from the trigger and the closer malfunctions.

  The protrusion suppresses the bending of the closer and makes it difficult for the closer to malfunction due to the bending.

  When the damper is housed in a damper case and the tension springs are installed on both sides of the damper case, the balance between the force applied to the damper case and the requirement to increase the pulling force using a pulling spring with a small coil diameter is ensured. Can meet the demands of

In addition, the device having the malfunction return mechanism may be configured such that when the lock state of the closer is to be maintained, when the lock is released for any reason (the ear portion of the trigger cam that should have entered the recess is from the recess). The door is automatically restored to the locked state by opening and closing the sliding door. The automatic repair mechanism will be described in detail in the section of the embodiment.

  The effect of housing the tension spring in a resin tube in a loosely fitted state will also be described in the section of the embodiment.

It is a front view which shows the outline | summary of an example of use of the closer of this invention. It is a perspective view which shows an example of the closer of this invention. FIG. 3 is a side view of the closer of FIG. 2. It is a top view of the closer of FIG. It is a top view of the damper case assembly employ | adopted as the closer of FIG. It is a side view of the damper case assembly employ | adopted as the closer of FIG. It is a disassembled perspective view which shows the component of the damper case assembly of FIG. It is the perspective view which looked at the cam holder from the bottom side. It is the perspective view which looked at the cam for triggers from the bottom face side. It is a longitudinal cross-sectional view of an outer case. It is sectional drawing along the AA line of FIG. It is sectional drawing along the BB line of FIG. It is sectional drawing of the principal part which shows the state (locking state) which the ear | edge part of the cam for triggers entered into the recessed part of the door roller holder. It is sectional drawing of the push spring installation part of the cam for triggers in a locked position. It is sectional drawing of the principal part which shows the state (unlocked state) which the ear | edge part of the trigger cam escaped from the recessed part of the door roller holder. It is sectional drawing of the push spring installation part of the cam for triggers in an unlocking position. It is sectional drawing which shows a state when the error cancellation cam of a malfunction return mechanism passes a trigger installation point. It is sectional drawing which shows the state which the ear | edge part of the cam for triggers entered into the recessed part of a door roller holder, and error correction was completed. It is a top view of an outer case. FIG. 3 is a plan view of a damper case assembly in which a tension spring is covered with a resin cylinder. It is a side view of the damper case assembly of FIG. It is a top view of the damper case assembly which provided the joint fixed to the rear part of a damper case instead of the cam holder for an opening operation | movement buffer, and the trigger cam. It is a side view of the damper case assembly of FIG.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a sliding door closer according to the present invention will be described with reference to FIGS. FIG. 1 shows an example of the use of the closer of the present invention.

  The closer 1 in FIG. 1 is configured to buffer both the closing and opening movements of the hanging sliding door SD. In the following description, the end of the closer 1 on the sliding door closing side is considered as the tip of the closer.

  In FIG. 1, US is an upper door of an entrance that opens and closes with the sliding door SD, and R is a sliding door rail attached to the lower surface of the upper door US.

  As shown in FIGS. 11 and 12, the sliding door rail R has a lower opening having two opposing track surfaces Os that are connected to the opposite side wall Sw, the upper wall Uw that connects the two side walls, and the lower end of the opposite two side wall Sw. It is a known rail.

  Although the illustrated sliding door rail R guides a grooved door with a concave arc-shaped track surface Os, there is also a sliding door that guides a grooved door with a track surface provided with a ridge rail.

A closed trigger 50 and an open trigger (not shown) are fixed to the sliding door rail R. Open side of the trigger is in the position to be captured by the trigger cam in the open-side when the cam trigger provided on the rear end side of the closer 1 _(5-2 in FIG. ₄₎ approaches the open end point of the sliding door . For the sake of distinction, a plurality of elements are given reference numbers of _-1 , _-2 , and _-3 for the sake of distinction, but explanations are omitted where unnecessary.

In FIG. 1, reference numeral 1 denotes a closer, 2 ₋₁ to 2 _-3 denotes a door wheel unit provided with a door wheel 2 a (see FIGS. 2 to 4) that runs on the raceway surface of the sliding door rail R, and 20 denotes a door wheel unit 2. _The sliding door connector is connected to _-1 , 2 and ₂ using a rotatable vertical support shaft.

  The sliding door connector 20 is a device having the function of adjusting the height of the sliding door SD and the thickness direction, and the one connected to the door unit on the sliding door closing side exposes the adjustment surface (the surface shown in FIG. 11) to the outside. The other is embedded in the upper part of the closed end frame of the sliding door SD, and the other is embedded in the upper part of the open end frame of the sliding door SD with the adjustment surface exposed to the outside.

  FIG. 2 is a perspective view showing the overall configuration of the exemplary closer 1, FIG. 3 is a side view showing the overall configuration, FIG. 4 is a plan view showing the overall configuration, and FIG. 5 is a plan view of the damper case assembly. 6 is a side view of the case assembly, FIG. 7 is an exploded perspective view of elements constituting the damper case assembly of FIG. 5, FIG. 8 is a bottom side of the cam holder 4, and FIG. 9 is a bottom side of the trigger cam 5. FIG. 10 shows cross-sectional views of the outer case of the closer 1 at right angles.

  FIG. 11 shows a cross section taken along the line AA in FIG. 3, and FIG. 12 shows a cross section taken along the line BB in FIG. The damper case assembly referred to in the present invention is a combination of a damper case, a damper, a cam holder, a trigger cam, a push spring, a tension spring, and an error release cam, which will be described later.

The illustrated closer 1 includes an outer case 3 shown in FIGS. 2 to 4, a door unit 2 ₋₁ and 2 ₋₃ , and cam holders 4 ₋₁ and 4 ₋₂ shown in FIGS. 2, 4, 5, and 6. , Trigger cams 5 ₋₁ , 5 ₋₂ , push springs 6 shown in FIGS. 5, 7, 14, and 16, tension springs 7 shown in FIGS. 5 to 7, FIGS. 2, 4, and 5. 7, the damper 8, the damper case 9, and a malfunction return mechanism 30 (see FIGS. 5, 6, 17, and 18) installed as a preferable element.

The door pulley units 2 ₋₁ and 2 ₋₂ are respectively provided at the closed end (left end of the sliding door SD in FIG. 1) and the open end (right end of the sliding door SD in FIG. 1) of the sliding door SD.

Sliding door SD of closed side door roller unit 2 _-1 tip, the door roller holder 2b is detachably attached to the distal end of the outer casing 3 of the closer 1 through (see FIGS. 2 and 3, etc.).

On the other hand, the door roller unit 2 _-2, as shown in FIG. 1, is disposed at the end of the open side of the sliding door SD independently of closer 1.

Further, the door roller unit _{2 -3,} as shown in FIG. 2, FIG. 3, removably attached to the rear end side of the outer casing 3, the trigger cam _{5 -1, 5 -2} trigger closed side 50 (See FIG. 1, FIG. 14, FIG. 16, and FIG. 18) and an open-side trigger (not shown).

Door roller holder 2b door roller unit _{2 -1} and _{2 -3} are formed in the resin. This is the door roller holder 2b, the trigger cam 5 _-1, recess 2c to enter the ear 5b of _5-2 is provided opposite on both sides between the center of the groove.

  The recess 2c has a slope 2d (see FIGS. 13 to 16) having an inclination angle that does not cause the hook 5 of the trigger cam to be hooked (hooked) on the side where the trigger cam 5 is pulled by a later-described pull spring. In preparation.

  The inclination angle at which the ear portion 5b is not tightly hooked (hooking) is an angle at which the ear portion 5b entering the concave portion 2c is not pressed against the inclined surface 2d when it escapes from the concave portion 2c. is there.

  The illustrated slope 2d has an arcuate surface whose upper surface gradually increases in inclination toward the entrance side of the recess 2c. The ear portion 5b in contact with the arcuate surface has a sliding spring moving force in addition to the force of the pulling spring 7. By receiving the applied force, it can slide on the arc surface and smoothly escape from the recess 2c.

  Although the illustrated door pulley holder 2b includes a grooveless door wheel 2a, the connecting portion with respect to the outer case 3 is designed in common so that it can be replaced with one having a grooved door wheel.

The outer case 3 is a metal case and, as shown in FIG. 10, projects from the bottom wall 3 a, opposed side walls 3 b and 3 b rising from both ends of the bottom wall, and approaching each other from the upper ends of the side walls 3 b and 3 b. ear guides 3c, 3c, and, cam holder _{4 -1, 4 -2} holes 3d (see FIGS. 17 to 19 for detain the locked position. This locking projections or hooks square holes shown below Is stable and preferred). The ear guide 3 c is not provided at the front end portion and the rear end portion of the outer case 3.

  The hole 3d has a predetermined position on the bottom wall 3a, specifically, a position corresponding to the recess 2c provided in the front and rear door cart holders of the outer case 3, and the foremost hole (the leftmost hole in FIG. 19). It is provided at a total of four locations: a position retracted from 3d corresponding to the relative movement amount of the outer case 3 and a position advanced from the rearmost hole (the hole at the right end in FIG. 19) by an amount corresponding to the relative movement amount of the outer case 3.

The cam holders 4 _-1 and 4 _-2 are resin holders facing each other with their backs facing each other, and as shown in FIG. 7, each of the support arms 4b extends forward from both sides of the front surface of the main body 4a. Have The support arm 4 b is provided with a hook portion 4 c into which a support shaft 5 a that serves as a rotation fulcrum of the trigger cam 5 is fitted.

  The hook portion 4c has an entrance width slightly smaller than the diameter of the support shaft 5a, and the support shaft 5a is press-fitted.

  Moreover, it has the recessed part 4d opened to the side surface, and the groove | channel 4e connected to the recessed part 4d in the both sides of the main-body part 4a. The groove 4e opens to the side surface and the back surface of the main body 4a, and the width thereof is narrower than the width of the recess 4d.

As shown in FIG. 8, each of the cam holders 4 _-1 and 4 _-2 further includes a recess 4f that opens to the bottom surface and the back surface of the main body 4a, and a groove 4g that continues to the recess 4f. The groove 4g opens on the bottom surface and the back surface of the main body portion 4a, and the width thereof is narrower than the width of the concave portion 4f.

The trigger cams 5 _-1 and 5 _-2 have a support shaft 5a (see FIGS. 7 and 9) fitted on the hook portion 4c so as to be rotatable on the lower side surface on the rear end side.

  Also, the trigger 50 is inserted when the ear portion 5b sliding on the ear guide 3c of the outer case 3 on both side portions on the distal end side, the contact surface 5c that abuts against the trigger 50, and the ear portion 5b escapes from the recess 2c. A capture space 5d is provided.

Ears 5b, the trigger cam _{5 -1, 5 -2} enters the recess 2c at a position abutting against the trigger.

Compression spring 6, each of the trigger cam 5 _-1, 5 _-2 biased in one direction individually, to hold the state enters for recess 2c of the ear 5b. The position of the push spring 6 is held by using a projection 14 provided on the cam holder 4 and a non-through spring receiving hole 15 (see FIGS. 14 and 16) provided on the trigger cam 5.

  The protrusion 14 is inserted into one end of the push spring 6, and the other end of the push spring 6 is inserted into the spring receiving hole 15.

Compression spring 6 shown is a coil spring in which the two in a pair, between and between the cam holder 4 _-2 and trigger cam _5-2 of the cam holder 4 _-1 and a trigger cam 5 _-1 Each is compressed and arranged.

The tension spring 7 relatively moves the trigger cams 5 _-1 and _5-2 and the outer case 3 in the opening / closing direction of the sliding door SD. The tension spring 7, the cam holder 4 _-1, a length dimension of the coil spring arranged between 4 _-2, as shown in FIG. 7, has a head 7a and a small-diameter neck portion 7b at both ends.

Its head 7a and a small-diameter neck portion 7b is cam holder _{4 -1, 4} is fitted into the concave portion 4d and the groove 4e _-2 both ends of the tension spring 7 cam holder _{4-1 are} removably connected to the _{4 -2} .

  The damper 8 adds resistance to the relative movement of the trigger cam 5 and the outer case 3 to decelerate the movement of the sliding door SD. Here, a hydraulic damper is provided as the damper 8.

  The hydraulic damper encloses oil in a cylinder 8a partitioned into two chambers by a piston, and passes the oil between two chambers through an orifice formed in a piston (not shown), thereby moving the piston rod 8b. It is a widely known one that adds resistance to the movement of Therefore, detailed description is omitted here.

Cylinder 8a of the hydraulic damper is supported by the cam holder 4 _-2 open side closer. The cam holder 4 _-2, a connecting shaft 10a, the connecting portion 10 (see FIGS. 5 and 7) comprising a flange 10b formed at the tip of the connecting shaft are formed integrally.

A groove connecting shaft 10a of the connecting portion 10 is provided on the rear wall of the damper casing 9, the flange 10b is inserted into the inside of the damper case 9 cam holder 4 _-2 is linked to disconnect the damper case 9, the flange 10b in a groove provided in the end face is fitted the rear of the cylinder 8a of the cam holder 4 _-2 holding cylinder 8a due have been made.

Further, the piston rod 8b is dropped into a groove provided in the front wall of the damper casing 9, the cam holder connection piece 8c having a diameter larger than the rod diameter was attached to the tip of the piston rod 8b (see FIG. 7) 4 _{- 1} is inserted into a recess 4f (see FIG. 8) provided on the bottom surface of ₁ and is detachably connected to the cam holder 4-1.

  The damper case 9 stores and holds the damper 8, and the tension springs 7 are respectively arranged on the outer sides of the both sides of the damper case 9.

Reference numeral 11 of FIG. 3 and FIG. 12 is a projection provided on the door roller holder 2b door roller unit _{2 -1.} The protrusion 11 is slightly lifted from the raceway surface Os when the closer 1 is not receiving a pressing force, and does not become a resistance for the closer to travel.

When the closer ₁ receives a pressing force and contacts the track surface Os of the sliding door rail near the trigger cam 5-1, the projection 11 supports the door roller holder 2b together with the door wheel 2a.

The rear side of the outer case 3 floats off the raceway surface Os due to the weight of the sliding door being added to the front side of the outer case 3, so that the trigger cam _5-2 is pushed down from the trigger on the open side. Even if added, it will not bend as much as the closed side.

  Therefore, although the projection 11 is not provided on the rear side of the outer case 3, the projection 11 can also be provided on the rear side of the outer case 3.

  Although the illustrated door pulley 2a is a grooveless door wheel, when the door wheel holder 2b is detachably attached to the outer case 3 with a common design of the connecting portion of the door wheel holder 2b to the outer case 3, the illustrated door wheel is shown. The holder 2b can be replaced with a door wheel holder having a grooved door wheel that rolls on the rail, and the types (integration) of the outer case 3, the cam holder 4, the trigger cam 5, and the like can be achieved.

Next, the malfunction return mechanism 30 will be described with reference to FIGS. 7 and 17 to 19. The malfunction return mechanism 30 is locked when the relative movement between the trigger cam _5-1 and the outer case 3 should be locked (when the ear portion 5b is held in the recess 2c). When a situation that does not occur occurs, the sliding door SD is opened and closed to return to the locked state.

When said newly installed door closer, sometimes ear 5b of the trigger cam 5 _-1 should be accommodated in the recess 2c is exited from the recess 2c (which in the unlocked state).

At that time, the trigger cam 5 _-1, since the pull-moved to the contraction end point of the tension spring 7 deviates from the recess 2c, is not performed buffering of the movement of the sliding door by the closer. A malfunction return mechanism 30 is provided for the purpose of preventing the malfunction.

The illustrated malfunction return mechanism 30 is a combination of an error release cam 31 and a second push spring 32 having a weaker force than the push spring 6. The second compression spring 32, the error release cam 31 is provided under compression between the error release cam 31 and the trigger cam 5 _-1, relative to the trigger cam 5 _-1, triggering cam by pushing the spring 6 5 _-1 of the rotation direction (This is called "locking direction") and pressed in the opposite direction (unlock direction).

  The position of the second push spring 32 is held by using the protrusion 16 provided on the error release cam 31 and the non-penetrating spring receiving hole 17 provided on the trigger cam 5. The protrusion 16 is inserted into one end of the second pressing spring 32, and the other end of the second pressing spring 32 is inserted into the spring receiving hole 17.

  The error release cam 31 is rotatable about a support shaft 33 provided on the trigger cam 5 as a fulcrum. The support shaft 33 is at a position slightly decentered with respect to the support shaft 5a.

  This error canceling cam 31 has a hook portion 31 a that is press-fitted and fitted to the support shaft 33 at the rear end portion. Moreover, it has the 1st protrusion 31b which protruded upwards, and the cam surface 31c used as the front surface of the 1st protrusion 31b in a front-end | tip part.

  In addition, a second protrusion 31d protruding downward is provided on the lower surface of the first protrusion 31b at a position retracted by a certain length.

The error releasing cam 31, when the trigger cam 5 _-1 should remain locked, error status state (lock was solved to ears 5b are moved Pull tension spring 7 to escape from the recess 2c In this case, when the sliding door SD is closed by the contraction of the pulling spring 7 and no tensile force is generated), the error is corrected by the following operation.

When the sliding door SD is closed in a state in which the error has occurred, the trigger cam 5 _-1 even reach the installation point of the recess 2c trigger 50 provided on the door roller 2a of the door roller unit 2 _-1, engaging the trigger 50 The point has not been reached.

  Therefore, the cam surface 31c of the error release cam 31 comes into contact with the trigger 50 by the further movement of the sliding door SD in the subsequent closing end point direction (at this position, the second protrusion with respect to the second hole 3d counting from the frontmost part). 31d drop is allowed).

  As a result, the distal end side of the error release cam 31 is pushed and moved in the unlocking direction (the direction of turning downward) as shown in FIG. Pass through the installation point.

After the passage, the error release cam 31 returns to the force at the original position of the second compression spring 32 (trigger cam 5 _-1 Press devoted position).

When the sliding door SD is reversed in this state, the first protrusion 31b is retained by the trigger 50, and the trigger cam _5-1 and the outer case 3 are relatively moved by further backward movement of the sliding door SD (moving in the opening direction in the illustrated case). Movement occurs.

By its relative movement, as shown in FIG. 18, malfunction state of the trigger cam is repaired enters the recess 2c by the force of the spring 6 pushes the ear portion 5b of the trigger cam 5 _-1.

At this time, the error release cam 31 is in a position where the second projection 31d enters the foremost hole 3d provided in the outer case 3, and the error is caused by entering the foremost hole 3d of the second projection 31d. The release cam 31 is pushed by the trigger cam _5-1 , and rotates in the lock direction.

  By the rotation, the holding of the first protrusion 31b by the trigger 50 is simultaneously released.

  The second protrusion 31d that has entered the hole 3d is locked to the edge of the hole 3d. In the illustrated closer, the hooking itself with respect to the inclined surface 2d of the ear portion 5b is prevented.

Incidentally, when the trigger cam 5 _-1 is rotated in the unlocking direction abuts against the trigger 50, the error release cam 31 is unlocked in conjunction with the trigger cam 5 _-1 by the force of the second compression spring 32 Rotate in the direction.

  The error canceling cam 31 is also included in the closing door cushion for closing the sliding door.

Or closer 1 configured as, when the sliding door SD is closed, the ears 5b the outer casing of the trigger cam 5 _-1 in a position where the trigger cam 5 _-1 is separated from the 5 _-2 maximum the recess 2c of the door roller holder 2b attached to the third tip, also ear 5b of the trigger cam 5 _-2 intrudes each recess 2c door roller holder 2b.

  The entering state is held by the force of the push spring 6, and when the closer is normal, the closer 1 travels on the raceway surface of the sliding door rail R in the sliding door opening / closing direction as the sliding door SD moves.

When the Suppose sliding door SD is closed, the contact surface 5c of the trigger cam 5 _-1 near the end point strikes the trigger 50 of the closing side.

Thereafter, the sliding door SD further moves in the closing direction. At this time, the trigger cam _5-1 is held by the trigger 50.

Therefore, the trigger cam 5 _-1 is rotated by the spindle 5a as a fulcrum, the trigger cam 5 _-1 and the outer casing ear 5b of the trigger cam 5 _-1 in its operation is escaped from the recess 2c 3 of the locking of the relative movement is solved, slides by the force of the outer casing 3 the tension spring 7 against the trigger cam 5 _-1 detained to the trigger 50, hanging on the slide is decelerated by the damper 8 sliding door rail The sliding door SD is slowly closed without impact.

  In the illustrated closer 1, the inclined surface 2d of the recess 2c provided in the door roller holder 2b is formed into a surface having an inclination angle at which the trigger cam ear portion 5b does not catch tightly, so the ear portion 5b comes out of the recess 2c. Even when the sliding door SD is suddenly opened and closed, the switching from the locked state to the unlocked state is smoothly performed without an unpleasant disengagement sound or impact sound.

  Further, since the force of the push spring 6 is used to maintain the state where the ear portion 5b enters the recess 2c, that is, the locked state, the locked state can be naturally released even if the trigger cam 5 hits the trigger 50 strongly. And stable operation.

  Furthermore, the mechanism for switching the lock and unlock of the closer is composed of few elements, and the mechanism is simple and the movement is also simple. Therefore, the durability of the closer is improved, and smooth operation can be maintained for a long time.

In addition, since the illustrated closer ₁ is provided with the protrusion 11 that is in contact with the raceway surface Os of the sliding door rail near the trigger cam 5-1, the outer case 3 is engaged when the trigger cam is engaged with and released from the trigger. Further, the bending of the door-side door holder 2b on the closed side is suppressed, so that the trigger cam is poorly held due to the bending and the malfunction of the closer is less likely to occur.

  Further, since the damper 8 is housed in the damper case 9 and the tension springs 7 are installed on both sides of the damper case, there is a need to increase the pulling force using a tension spring having a small coil diameter, and to the damper case. It can also meet demands for ensuring balance of power.

  In addition, since the malfunction return mechanism 30 is provided, the automatic recovery to the locked state is performed when the lock that should not be released for some reason is released as described above.

  As shown in FIGS. 20 to 23, the closer according to the present invention includes a housing in which the tension spring 7 is housed in a resin-made cylinder 12 in a loosely fitted state, as shown in FIGS. 20 to 23. Conceivable.

  The resin cylinder 12 has a maximum length obtained by adding a surplus length necessary for assembly to the pull spring length when the pull spring 7 is contracted to the maximum.

  As described above, when the pulling spring 7 is covered with the resin cylinder 12, the sound generated when the pulling spring 7 expands and contracts hardly leaks to the outside, and a countermeasure for applying a viscous material such as grease, which has been conventionally used, is applied. Is no longer necessary. If a viscous material is applied, the assembly of the closer becomes troublesome and the use environment is deteriorated, which is not preferable. However, the addition of the resin cylinder 12 eliminates the problem.

  In addition, when it is required to have a buffer function only for the movement when the sliding door SD is closed, the damper for the opening operation buffer is unnecessary, and the damper 8 is fixed to the outer case 3.

22, as shown in FIG. 23, the rear end of the damper case 9 is attached to the joint 13 instead of the cam holder 4 _-2 open side closer. The joint 13 includes a connecting portion 13a between a connecting shaft and a damper case including a flange, a concave portion 13b, a groove 13c, and a hook 13d.

Connecting section 13a, the same function be similar to connecting portions 10 provided on the cam holder 4 _-2.

  The recess 13b has the same shape as the above-described recess 4d, and the groove 13c has the same shape as the groove 4e. The recess and the groove are used for detachably connecting one end of the tension spring 7.

  The hook 13d is inserted into the hole 3d at the rear portion of the outer case 3 and locked to the edge of the hole 3d. Thereby, the closer having only the sliding door closing operation buffer function is fixed so that the damper case 9 does not move relative to the outer case 3 in the sliding door opening / closing direction, and the damper 8 moves relative to the outer case 3 as well. Be blocked.

1 closer ₂ -1 _{to 2 -3} door roller unit 2a door roller 2b door roller holder 2c recess 2d slopes 3 outer case 3a the bottom wall 3b side walls 3c ear guides 3d holes _{4 -1, 4 -2} cam holder 4a body portion 4b supporting arm 4c hook 4d, 4f recess 4e, 4g grooves _{5-1, 5-2} for the trigger cam 5a shaft 5b ear portion 5c abutting surface 5d trapping space 6 compression spring 7 tension spring 7a head 7b small diameter neck portion 8 damper 8a cylinder 8b piston rod 8c Connection piece 9 Damper case 10 Connection portion 10a Connection shaft 10b Flange 11 Protrusion 12 Resin tube 13 Joint 13a Connection portion 13b Recess 13c Groove 13d Hook 14, 16 Protrusion 15, 17 Spring receiving hole 20 Sliding door connector 30 Malfunction return Mechanism 31 Error release cam 31a Hook portion 31b First protrusion 31c Cam surface 31d Second protrusion 32 second compression spring 33 supporting shaft 50 triggers SD sliding door US on stile R sliding door rail Sw sidewall Uw top wall Os raceways

Claims (9)

A trigger (50) fixed to the sliding door rail (R), a door wheel (2a) connected to the sliding door (SD) and traveling on the raceway surface (Os) of the sliding door rail (R) when the sliding door is opened and closed, and the door wheel An outer case (3) having a door roller holder (2b) having a front and a rear attached thereto, a cam holder (4) supported by the outer case (3) so as to be slidable in the sliding door opening / closing direction, and the cam holder (4) ), A trigger cam (5) supported so as to be rotatable about a horizontally disposed support shaft (5a), and a push spring (6) for urging the trigger cam (5) in one direction, A pulling spring (7) for moving the trigger cam (5) and the outer case (3) relative to each other in the sliding door closing direction, and a damper (8) for applying resistance to the relative movement of the trigger cam and the outer case by the pulling spring force )
The trigger cam (5) enters an indentation (2c) provided in the door roller holder (2b) and is prevented from moving in the sliding door opening / closing direction by the indentation (2c); A contact surface (5c) that strikes the trigger (50), and a capture space (5d) that allows the trigger (50) to enter when the ear (5b) escapes from the recess (2c),
The holding of the entering state with respect to the concave portion (2c) of the ear portion (5b) is made by the force of the pressing spring (6),
The recess (2c) includes an inclined surface (2d) having an inclination angle at which the trigger cam (5) is pulled by the pull spring (7) to prevent the ear portion (5b) from being caught tightly. And
The trigger cam (5) supports the support shaft (5a) by further movement of the sliding door (SD) from the position where the contact surface (5c) contacts the trigger (50) toward the closing end point. The ear part (5b) escapes from the recess (2c) by the rotation, and the holding state of the entry into the recess (2c) is released,
Accordingly, the door closer (2b) and the outer case (3) are configured to move in the closing end point of the sliding door by the force of the pulling spring (7).   The sliding door closer according to claim 1, further comprising a damper case (9) for accommodating the damper (8), wherein the pulling springs (7) are respectively installed outside both sides of the damper case (9).   The cam holder (4), the trigger cam (5), and the pressing spring (6) are provided in opposite directions on the front end side and the rear end side of the outer case (3), respectively, and the outer case (3) The cam holders (4), the trigger cams (5), and the push springs (6) on the front end side and the rear end side constitute a closing operation buffer closer and an opening operation buffer closer for the sliding door, respectively. The sliding door closer according to claim 1 or 2, wherein the same thing is used for the pulling spring (7) and the damper (8) of the closing closer for the buffer and the closing closer for the opening operation.   The cam holder (4), the trigger cam (5), and the push spring (6) are provided on the distal end side of the outer case (3). The cam holder (4), the trigger cam (5), and the push spring ( 6) and the tension spring (7) and the damper (8) constitute a closing door cushioning closer, and the damper (8) is arranged at the rear of the outer case (3). The closer for a sliding door according to claim 1 or 2, which is detachably fixed to the door.   The door roller holder (2b) is one of a door wheel holder having a grooved door wheel and a door wheel holder having a grooved door wheel, and the door wheel holder having a grooved door wheel and the door wheel holder having a grooveless door wheel are the outer case ( The closing door closer according to any one of claims 1 to 4, wherein the connecting portion to 3) has a common design, and is selectively detachably attached to the outer case (3).   When the closer is bent by receiving a force to push down the door closer (2b), the door holder is brought into contact with the raceway surface (Os) of the sliding door rail near the trigger cam (5) together with the door carriage (2a). The closer for a sliding door according to any one of claims 1 to 5, further comprising a protrusion (11) for supporting (2b).   When the relative movement between the trigger cam (5) and the outer case (3) should be locked, when the unlocked situation occurs, the sliding door (SD) is opened and closed to return to the locked state. The closer for a sliding door according to any one of claims 1 to 6, further comprising a malfunction return mechanism (30).   The malfunction return mechanism (30) includes an error release cam (31) that is rotatable about a support shaft (33) provided on the trigger cam (5), and an error release cam (31) thereof. The error release cam (31) is compressed between the trigger cam (5) and the rotation direction of the trigger cam (5) by the pressing spring (6) with respect to the trigger cam (5). The second push spring (32) having a force weaker than that of the push spring (6) that presses in the opposite direction is provided, and the error release cam (31) has a sliding door (SD) toward a closed end point or an open end point. When moving, the cam surface (31c) pushed down by the trigger passes through the trigger installation point by pushing down the cam surface (31c), and when the sliding door reverses, the force of the second push spring (32) Return to original position The first protrusion (31b) to be fastened to the first and the ear (5b) of the trigger cam enter the hole (3d) provided in the outer case (3) at a position where it enters the recess (2c). The sliding door closer according to claim 7, which has two protrusions (31d).   The closing door closer according to any one of claims 1 to 8, wherein the pulling spring (7) is covered with a resin tube (12) having a length that does not interfere with expansion and contraction of the pulling spring (7). .

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