JP6817626B2 - Sliding door closer - Google Patents

Description

The present invention relates to a sliding door closer having a buffer function for preventing a sudden closing / opening of a hanging sliding door.

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

As a prior art of the hanging type sliding door closer, for example, those shown in Patent Documents 1 to 3 below are available.

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 the tip of a piston rod constituting a cushioning damper, and the locking projections of the hook member are provided at both ends of a rod-shaped casing. It is locked in the locking groove of.

When the hook member hits the fixing 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 disengaged (locked) with the locking groove. As a result, the rod-shaped casing slides relative to the hook member held by the fixing protrusion by the force of the tensile 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 cushioning damper, and the door connected to the rod-shaped casing is slowly closed.

Further, the closer of Patent Document 2 has a captured member provided on the open side and the closed side of the sliding door rail (fixing member), respectively, and a trapping retracting mechanism attached to the sliding door.

The catching / retracting mechanism has a first catch portion on one end side and a second catch portion on the other end side of a guide portion traveling along the sliding door rail.

When the first catch portion and the second catch portion do not capture 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.

As a result, the relative movement of the guide portion in the door opening / closing direction with respect to the captured catch portion is allowed, and the guide portion opens / closes the door by the force of the tensile 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 cushioning damper, and the door hung on the guide part closes slowly.

The closer of Patent Document 3 has a captured member (also referred to as a trigger referred to in the present application) provided on the sliding door rail, and a trapping retracting mechanism attached to the sliding door. Similar to the closer of Patent Document 2, the capture pull-in 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 captured member is not captured, and is covered. The lock is released when the capturing member is captured.

By the release, the outer case slides by the force of the pull-in spring with respect to the capturing member that has captured the captured member, and the slide is decelerated by the action of the cushioning member so that the door suspended from the outer case slowly closes. It has become.

JP-A-2009-127293 Japanese Unexamined Patent Publication No. 2013-170415 Japanese Unexamined Patent Publication No. 2016-8382

In the closer of Patent Document 1, when the door is vigorously opened and closed and the hook member on the side for releasing the locked state strongly hits the fixing protrusion, the hook member on the side for maintaining the locked state is impacted 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 by using the force of the tensile elastic body, but when the door is opened and closed vigorously, the tensile elastic body is released. A situation occurs in which the opening / closing speed cannot be followed, and as a result, the locked state cannot be maintained, and the locked hook member may rotate under its own weight and come out of the locking groove.

Further, when the door is opened and closed vigorously, the hook member comes into contact with and disengages from the fixing protrusion shockably, and an engaging sound and an engaging disengaging sound are generated.

In addition to the above problems, if the door is opened and closed vigorously and the hook member comes into contact with the fixing protrusion at a high speed, the escape speed of the locking protrusion of the hook member from the locking groove cannot keep up and resistance to the movement of the door It is also conceivable that the door may stop for a moment due to the addition, or the locking protrusion may come out as if it is flipped from the locking groove and the hook member may hit 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 each composed of three movable members (inclusion block, capture member, and contact block), and both catch portions. The structure and movement of the is complicated.

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

The closer of Patent Document 3 is configured by combining a movable block arranged in a slide case and a capturing protrusion provided on a sliding door rail to capture a captured member.

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

Therefore, when the capture protrusion is guided to the capture groove, a rotational moment (force to tilt) is applied to the movable block, which causes the movement of the movable block to gradually deteriorate or damage to the movable block. May be promoted.

The present invention has been made in view of the current technology as described above, and locks (prevents relative movement of the outer case that moves with the trigger cam and the sliding door) even when the sliding door is opened and closed vigorously. The purpose is to facilitate the release of the trigger, prevent the sliding door from moving uncomfortable, and suppress the malfunction and operating noise of the trigger cam.

In addition, when the trigger cam should be locked to the door roller holder but the lock is not locked, a mechanism for returning the trigger cam to the locked state by opening and closing the sliding door, and a pull for pulling the sliding door. It also provides a measure for alleviating the sound generated when a spring (an elastic body or a spring member referred to in the patent document) expands and contracts.

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 roller connected to the sliding door that runs on the track surface of the sliding door rail when the sliding door is opened and closed, and an outer case with the door roller holder equipped with the door roller attached to the front and rear respectively. A cam holder that is slidably supported in the outer case in the opening / closing direction of the sliding door, a trigger cam that is rotatably supported by the cam holder with a horizontally arranged support shaft as a fulcrum, and the trigger cam are urged in one direction. It is provided with a push spring for the trigger, a pull spring for relatively moving the trigger cam and the outer case in the sliding door closing direction, and a damper for adding resistance to the relative movement due to the force of the trigger cam and the pull spring of the outer case.
The trigger cam has an ear portion that enters a recess provided in the door roller holder and is prevented from moving in the sliding door opening / closing direction by the recess, a contact surface that abuts on the trigger, and the ear portion from the recess. It has a capture space that allows the trigger to enter when it escapes.
The force of the push spring is used to hold the selvage portion in the recessed state.
The recess is provided with a slope having an inclination angle on the side where the trigger cam is pulled by the pull spring to prevent the ear portion from being tightly caught.
The trigger cam rotates with the support shaft as a fulcrum when the sliding door further moves toward the closing end point from the position where the contact surface abuts on the trigger, and the rotation causes the ear portion to rotate. Escape from the recess and the lock is released,
Along with this, the door roller holder and the outer case are made to travel in the closing end point direction of the sliding door by the force of the pull spring.

In the present invention, the state in which the relative movement of the outer case and the trigger cam in the sliding door opening / closing direction is blocked is considered as a "locked state", and the state in which the relative movement is released is considered as an "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 buffer for opening operation buffers the closing operation of the closer composed of the same components as the closer for closing operation (cam holder, trigger cam, recess for inserting the ear of the trigger cam, push spring, and trigger). This is possible by adding it to the rear side of the outer case in the opposite direction to the closer for use.

As the trigger cam on the open side, the pull spring that moves the outer case relative to the opening direction of the sliding door, and the damper that adds resistance to the relative movement, the pull spring and the damper of the closer for closing the sliding door can be used together.

The trigger cam on the sliding door closing side and the trigger cam on the opening side are different in mounting direction, but have the same structure. The "trigger cam" referred to below refers to the two.

The closer for opening operation buffer is provided as needed and is not essential.

The door roller may be grooved or ungrooved. It is preferable that the door roller holder having a grooved door roller and the door roller holder having a grooveless door roller have a common design for the connection portion to the outer case and are detachably attached to the outer case.

The door roller holder may be provided with a protrusion that contacts the raceway surface of the sliding door rail near the trigger cam and supports the door roller holder together with the door roller when the closer is bent by a pushing force.

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

It is preferable to store this damper in a damper case, install the pull springs on both sides of the damper case, and move the trigger cam and the outer case relative to each other in the closing direction of the sliding door by the force of the left and right pull springs.

In addition, the closer of the present invention erroneously returns the locked state by opening and closing the sliding door when the relative movement of the trigger cam and the outer case should be locked and the lock is not made. Those provided with an operation return mechanism are preferable.

The malfunction recovery mechanism is an error release cam that can rotate around a support shaft provided on the trigger cam, and an error release cam that is reduced between the error release cam and the trigger cam. , A force more than the push spring that presses the trigger cam against the trigger cam in the direction opposite to the rotation direction (unlocking direction) of the trigger cam by the push spring (this is referred to as "locking direction" in the present invention). It should be equipped with a weak second push spring.

The error release cam is a second cam surface that is pushed down by the trigger when the sliding door moves toward the closed end point or the open end point, and passes through the trigger installation point by pushing down the cam surface, and the sliding door reverses. It has a first protrusion that returns to its original position by the force of a 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.

When the second protrusion enters the hole, the error release cam rotates in the locking direction by the force of the second push spring, whereby the trigger releases the first protrusion from being held at the same time. The ear portion of the trigger cam is configured to enter the recess to repair the malfunctioning state of the trigger cam.

If a closer for buffering the opening operation of the door is installed, the error release cam may be included in the closer for buffering the opening operation.

In the closer of the present invention, as a measure for alleviating the noise generated when the pull spring expands and contracts, the pull spring may be housed in a resin cylinder in a loosely fitted state. The resin cylinder has a length that does not interfere with the expansion and contraction of the pull spring, for example, the length obtained by adding the extra length required for assembly to the pull spring length when the pull spring contracts to the maximum. Use the one with the maximum length.

In the sliding door closer of the present invention, the selvage of the trigger cam is held in the recessed state by the force of the push spring, so that the slope of the recess is inclined so that the selvage of the trigger cam does not get caught tightly. It can be a surface with corners.

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

Further, since the state in which the trigger cam is inserted into the recess in the ear portion, that is, the locked state is maintained by the force of the push spring, the locked state can be naturally released even if the trigger cam strongly hits the trigger. It has excellent operational stability.

Further, the mechanism corresponding to the capture / retracting mechanism of Patent Documents 2 and 3 is a trigger cam that is supported by the cam holder and makes a simple movement, a push spring that urges the trigger cam in one direction, and a door roller holder. It is composed of a recess provided, and its mechanism is simple and its movement is simple.

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

The door roller holder is provided with a protrusion that supports the door roller holder together with the door roller in contact with the raceway surface of the sliding door rail near the trigger cam when the closer is bent by the pushing force, and is in charge of the trigger of the trigger cam. Instability is prevented.

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

Then, the trigger enters the capture space provided in the trigger cam by rotating the trigger cam to the unlocking point. By the entry, the trigger cam is detained by the trigger.

At this time, a force that momentarily pushes the closer downward is applied. Similarly, when the trigger comes out of the trapping space of the trigger cam, a force for pushing downward is applied.

It is conceivable that the force causes the outer case and the door roller holder to bend in a curved manner. When the contact surface comes off 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 stored in a damper case and the pull springs are installed on both sides of the damper case, there is a demand to increase the pulling force by using a pulling spring having a small coil diameter, and the balance of the force applied to the damper case is secured. Can meet the demands of.

Further, in the case of the one provided with the malfunction recovery mechanism, when the lock state of the closer should be maintained and the lock is released for some reason (the ear portion of the trigger cam that should have entered the recess is removed from the recess. When escaping), the sliding door opens and closes to automatically restore the locked state. The mechanism of the automatic repair will be described in detail in the section of the embodiment.

The effect of storing the pull spring in a resin cylinder in a loosely fitted state will also be described in the section of the embodiment.

It is a front view which shows the outline 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. It is a side view of the closer of FIG. It is a top view of the closer of FIG. It is a top view of the damper case assembly adopted for the closer of FIG. It is a side view of the damper case assembly adopted for the closer of FIG. It is an exploded perspective view which shows the component of the damper case assembly of FIG. It is a perspective view which looked at the cam holder from the bottom side. It is a perspective view which saw the trigger cam from the bottom side. It is a longitudinal right angle sectional view of an outer case. It is sectional drawing which follows the AA line of FIG. It is sectional drawing along the line BB of FIG. It is sectional drawing of the main part which shows the state (locked state) that the ear part of the trigger cam has entered into the concave part of the door roller holder. It is sectional drawing of the push spring installation part of the trigger cam in the lock position. It is sectional drawing of the main part which shows the state (unlocked state) that the ear part of the trigger cam escaped from the concave part of the door roller holder. It is sectional drawing of the push spring installation part of the trigger cam in the unlocked position. It is sectional drawing which shows the state when the error release cam of a malfunction recovery mechanism passes a trigger installation point. FIG. 5 is a cross-sectional view showing a state in which the ear portion of the trigger cam has entered the recess of the door roller holder and error repair has been completed. It is a top view of the outer case. It is a top view of the damper case assembly which covered the pull spring 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 cam holder for opening operation buffer and the joint which fixes to the rear part of a damper case in place of a cam for a trigger. It is a side view of the damper case assembly of FIG.

An embodiment of the sliding door closer of the present invention will be described with reference to FIGS. 1 to 23 of the accompanying drawings. FIG. 1 shows an example of using the closer of the present invention.

The closer 1 of FIG. 1 buffers 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.

The US in FIG. 1 is the upper stile of the doorway opened and closed by the sliding door SD, and R is the sliding door rail attached to the lower surface of the upper stile US.

As shown in FIGS. 11 and 12, the sliding door rail R is a lower opening having two side wall surfaces Sw, an upper wall Uw connecting the two side walls, and two raceway surfaces Os connected to the lower ends of the two facing side walls Sw. It is a known rail.

The illustrated sliding door rail R guides a door roller without a groove on a concave arc-shaped track surface Os, but there is also a sliding door that guides a grooved door roller on a track surface provided with a convex rail.

A trigger 50 on the closing side and a trigger (not shown) on the opening side 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 convenience of distinction, a distinction number of _-1 , _-2 , or _-3 is added to a plurality of elements, but the distinction number is omitted where it is not necessary.

1 in Figure 1 is the _closer, 2 -1 _{to 2 -3,} door roller unit provided with a door roller 2a, each of which travels on the track surface of the sliding door rail R (see FIGS. 2 to 4), 20, door roller unit 2 It is a sliding door connector connected to _-1 , 2 and ₂ using a rotatable vertical support shaft.

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

A perspective view showing the overall configuration of the example closer 1 is shown in FIG. 2, a side view showing the overall configuration is shown in FIG. 3, a plan view showing the overall configuration is shown in FIG. 4, and a plan view of the damper case assembly is shown in FIG. A side view of the case assembly is shown in FIG. 6, an exploded perspective view of the elements constituting the damper case assembly of FIG. 5 is shown in FIG. 7, the bottom side of the cam holder 4 is shown in FIG. 8, and the bottom side of the trigger cam 5 is shown in FIG. , The longitudinal orthogonal cross section of the outer case of the closer 1 is shown in FIG.

Further, a cross section along the line AA of FIG. 3 is shown in FIG. 11, and a cross section along the line BB of FIG. 3 is shown 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 pull spring, and an error release cam, which will be described later.

Closer 1 shown, the outer casing 3 shown in FIGS. 2 to 4, the door roller unit _{2 -1, 2 -3,} 2, 4, 5, cam holder _4-1 shown in FIG. _{6, 4 -2} trigger cam _{5 -1, 5 -2,} 5, 7, 14, compression spring 6 shown in FIG. 16, the tension spring 7 shown in FIGS. 5-7, 2, 4, 5 , The damper 8 shown in FIG. 7, the damper case 9, and the malfunction recovery mechanism 30 (see FIGS. 5, 6, 17, and 18) installed as preferable elements are provided.

Door roller unit _{2 -1, 2 -2,} provided the closed side tip portion of the sliding door SD to the tip of the open-side (the left end of the sliding door SD in FIG. 1) (the right end of the sliding door SD in FIG. 1), respectively.

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 FIGS. 1, 14, 16 and 18) and are individually detained by open-side triggers (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 is a side on which the trigger cam 5 is pulled by a pull spring described later on a slope 2d (see FIGS. 13 to 16) having an inclination angle at which the ear portion 5b of the trigger cam does not get caught (hooking) tightly. Be prepared for.

The inclination angle at which the selvage portion 5b is not tightly hooked (hooking) is an angle at which the selvage portion 5b that has entered the recess 2c is not pressed tightly against the slope 2d when it escapes from the recess 2c. is there.

The example slope 2d has an arc surface whose upper side is an arc surface whose inclination angle gradually increases toward the inlet side of the recess 2c, and the ear portion 5b in contact with the arc surface has a sliding door moving force due to the force of the pull spring 7. It can slide on the arc surface by receiving the applied force and smoothly escape from the recess 2c.

The illustrated door roller holder 2b includes a grooveless door roller 2a, but the connection portion to the outer case 3 has a common design so that it can be replaced with one having a grooved door roller.

The outer case 3 is a metal case, and as shown in FIG. 10, the outer case 3 projects from the bottom wall 3a, the opposing side walls 3b and 3b rising from both ends of the bottom wall, and the upper ends of the side walls 3b and 3b in a direction approaching each other. 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 preferable). The ear guides 3c are not provided at the front end and the rear end of the outer case 3.

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

Cam holder 4 _-1, 4 _-2, a plastic holder which faces toward the back to each other, as shown in FIG. 7, the support arm 4b, each extend out positively from both sides of the front surface of the main body 4a Has. The support arm 4b is provided with a hook portion 4c into which a support shaft 5a serving as a rotation fulcrum of the trigger cam 5 is fitted.

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

Further, on both sides of the main body 4a, there are recesses 4d opened on the side surface and grooves 4e connected to the recesses 4d. The groove 4e is open on the side surface and the back surface of the main body portion 4a, and the width thereof is narrower than the width of the recess 4d.

Cam holder _{4 -1, 4 -2,} further, as shown in FIG. 8, with grooves 4g communicating with the recess 4f and the recess 4f that opens on the back and bottom of the body portion 4a. The groove 4g is open to the bottom surface and the back surface of the main body portion 4a, and the width thereof is narrower than the width of the recess 4f.

Trigger cam _{5 -1, 5 -2,} has the hook portion 4c to pivotally fitted shaft 5a (see FIGS. 7 and 9) to the lower side surface of the rear end.

Further, the selvage portion 5b sliding on the ear guide 3c of the outer case 3, the contact surface 5c abutting on the trigger 50, and the trigger portion 50 enter when the selvage portion 5b escapes from the recess 2c on both side portions on the tip side. It has a capture space of 5d.

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 the protrusion 14 provided on the cam holder 4 and the non-penetrating 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 placed.

Tension spring 7, the trigger cam _{5 -1,} the _5-2 and the outer casing 3, is relatively moved in the 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, it 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 slow down the movement of the sliding door SD. Here, a hydraulic damper is provided as the damper 8.

The hydraulic damper encloses oil inside a cylinder 8a divided into two chambers by a piston, and the oil is passed through an orifice formed in a piston (not shown) to flow between the two chambers, thereby causing a piston rod 8b. It adds resistance to the movement of the piston and is widely known. 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 _- recess 4f provided on the _first bottom surface is removably connected to the cam holder 4 _-1 allowed to enter (see Figure 8).

The damper case 9 stores and holds the damper 8, and pull springs 7 are arranged on the outer sides of both side portions 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.} When the closer 1 is not subjected to the pushing force, the protrusion 11 is slightly lifted from the raceway surface Os and does not become a resistance to the running of the closer.

When the closer ₁ receives a pushing-down force and comes into contact with the raceway surface Os of the sliding door rail near the trigger cam 5-1, the protrusion 11 supports the door roller holder 2b together with the door roller 2a.

Rear side of the outer case 3, the weight of the sliding door is in the floating slightly from the track surface Os by joining the front side of the outer casing 3, force pushing down from the open side triggers the trigger cam 5 _-2 Even if it is added, it does not bend as much as the closed side.

Therefore, although the structure is such that the protrusion 11 is not provided on the rear side of the outer case 3, the protrusion 11 can also be provided on the rear side of the outer case 3.

The illustrated door roller 2a is a grooveless door roller, but when the door roller holder 2b is detachably attached to the outer case 3 with the common design of the connection portion of the door roller holder 2b to the outer case 3, the illustrated door roller is attached. The holder 2b can be replaced with a door roller holder having a grooved door roller that rolls on the rail, and the types of the outer case 3, the cam holder 4, the trigger cam 5, and the like can be integrated (common).

Next, the malfunction recovery mechanism 30 will be described with reference to FIGS. 7 and 17 to 19. The malfunction recovery mechanism 30 is locked when the relative movement of the trigger cam _5-1 and the outer case 3 should be locked (when the selvage portion 5b is held in the recess 2c). When a situation 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 recovery mechanism 30 is provided for the purpose of preventing the trouble.

The malfunction recovery mechanism 30 shown in the figure 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 Press in the direction opposite to the rotation direction (this is called the "locking direction") (unlocking 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 push spring 32, and the other end of the second push spring 32 is inserted into the spring receiving hole 17.

The error release cam 31 can rotate about the support shaft 33 provided on the trigger cam 5 as a fulcrum. The support shaft 33 is in a position slightly eccentric with respect to the support shaft 5a.

The error release cam 31 has a hook portion 31a at the rear end portion that is press-fitted and fitted onto the support shaft 33. Further, the tip portion has a first protrusion 31b protruding upward and a cam surface 31c which is a front surface of the first protrusion 31b.

Further, it has a second protrusion 31d that protrudes downward from the first protrusion 31b on the lower surface at a position retracted by a certain length.

The error release cam 31 is in a state in which the ear portion 5b escapes from the recess 2c and is pulled by the pull spring 7 when the trigger cam _5-1 should be maintained in the locked state (an error state in which the lock is released). At this time, when the sliding door SD is closed by the pull spring 7 (the pull spring 7 is not contracted to generate a tensile force), the operation is as follows to repair the error.

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 You haven't reached the point.

Therefore, the cam surface 31c of the error release cam 31 comes into contact with the trigger 50 when the sliding door SD is further moved toward the closing end point (at this position, the second protrusion with respect to the second hole 3d counting from the frontmost portion). A drop of 31d is allowed).

As a result, the tip end side of the error release cam 31 is pushed and moved in the unlocking direction (direction of rotating downward) by the component force acting on the cam surface 31c as shown in FIG. 17, and the first protrusion 31b of the trigger 50 Pass 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 held by the trigger 50, and the trigger cam _5-1 and the outer case 3 are relative to each other due to the further reverse movement of the sliding door SD (movement in the opening direction in the example 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 at a position where the second protrusion 31d enters the frontmost hole 3d provided in the outer case 3, and an error occurs due to the second protrusion 31d entering the frontmost hole 3d. The release cam 31 is pushed by the trigger cam _5-1 and rotates in the locking direction.

Due to the rotation, the trigger 50 simultaneously releases the retention of the first protrusion 31b.

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 to the slope 2d of the selvage portion 5b is prevented thereby.

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 release cam 31 is also included in the closer for buffering the opening operation of 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 retracted 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.

The sliding door SD continues to move 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 example closer 1, the slope 2d of the recess 2c provided in the door roller holder 2b is a surface having an inclination angle at which the selvage 5b of the trigger cam does not get caught tightly, so that the selvage 5b comes out of the recess 2c. The feeling of resistance is small, and 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 inserted state of the ear portion 5b into the recess 2c, that is, the locked state is maintained by the force of the push spring 6, the locked state can be naturally released even if the trigger cam 5 strongly hits the trigger 50. It has excellent operational stability.

Furthermore, the mechanism for switching between locking and unlocking the closer is composed of a small number of elements, and the mechanism is simple and the movement is simple. Therefore, the durability of the closer is improved, and smooth operation can be maintained for a long period of time.

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

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

In addition, since the malfunction recovery mechanism 30 is provided, as described above, when the lock that should not be released for some reason is released, the lock state is automatically restored.

In the closer of the present invention, as shown in FIGS. 20 to 23, the pull spring 7 is housed in a resin cylinder 12 in a loosely fitted state as a measure for alleviating the sound generated when the pull spring 7 expands and contracts. Conceivable.

The resin cylinder 12 is used so that the maximum length is the length obtained by adding the extra length required for assembly to the pull spring length when the pull spring 7 is maximally contracted.

When the pulling spring 7 is covered with the resin cylinder 12 in this way, the sound generated when the pulling spring 7 expands and contracts is less likely to leak to the outside, and a countermeasure for applying a viscous substance such as grease, which has been conventionally used. Is no longer needed. If a viscous material is applied, the assembly of the closer becomes troublesome and the usage environment deteriorates, which is not preferable. However, by adding a resin cylinder 12, the problem can be solved.

When it is required to have a buffer function only for the movement when the sliding door SD is closed, the damper 8 for opening operation buffer is unnecessary, so 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 has a connecting portion 13a for connecting a connecting shaft and a damper case composed of a flange, a recess 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 recess 4d described above, and the groove 13c has the same shape as the groove 4e. The recess and the groove are used to detachably connect one end of the pull spring 7.

The hook 13d is inserted into the hole 3d at the rear of the outer case 3 and locked to the edge of the hole 3d. As a result, in the closer having only the closing operation buffer function of the sliding door, the damper case 9 is fixed so as not to move relative to the outer case 3 in the sliding door opening / closing direction, and the damper 8 also moves relative to the outer case 3. 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 part 10a Connection shaft 10b Flange 11 Protrusion 12 Resin cylinder 13 Joint 13a Connection part 13b Recess 13c Groove 13d Hook 14, 16 Protrusion 15, 17 Spring receiving hole 20 Sliding door fitting 30 Malfunction recovery Mechanism 31 Error release Cam 31a Hook 31b First protrusion 31c Cam surface 31d Second protrusion 32 Second push spring 33 Support shaft 50 Trigger SD Sliding door US Upper stile R Sliding door rail Sw Side wall Uw Upper wall Os Track surface

Claims (9)

A trigger (50) fixed to the sliding door rail (R), a door roller (2a) connected to the sliding door (SD) and traveling on the track surface (Os) of the sliding door rail (R) when the sliding door is opened and closed, and the door roller. An outer case (3) having a door roller holder (2b) provided with the above attached to the front and rear, respectively, a cam holder (4) slidably supported in the outer case (3) in the sliding door opening / closing direction, and the cam holder (4). A trigger cam (5) that is rotatably supported with a horizontally arranged support shaft (5a) as a fulcrum, and a push spring (6) that urges the trigger cam (5) in one direction. A pull spring (7) that relatively moves the trigger cam (5) and the outer case (3) in the sliding door closing direction, and a damper (8) that adds resistance to the relative movement due to the force of the pull spring of the trigger cam and the outer case. )
The trigger cam (5) has an ear portion (5b) that enters a recess (2c) provided in the door roller holder (2b) and is prevented from moving in the sliding door opening / closing direction by the recess (2c). It has an abutting surface (5c) that abuts on the trigger (50) and a trapping space (5d) into which the trigger (50) enters when the ear portion (5b) escapes from the recess (2c).
The selvage portion (5b) is held in the recessed state (2c) by the force of the push spring (6).
The recess (2c) is provided with a slope (2d) having an inclination angle on the side where the trigger cam (5) is pulled by the pull spring (7) to prevent the selvage portion (5b) from being tightly caught. Orbital
The trigger cam (5) uses the support shaft (5a) as a fulcrum as the sliding door (SD) moves further toward the closing end point from the position where the contact surface (5c) abuts on the trigger (50). The ear portion (5b) escapes from the recess (2c) due to the rotation, and the holding of the recessed state in the recess (2c) is released.
Along with this, the sliding door closer is configured so that the door roller holder (2b) and the outer case (3) travel in the closing end point direction of the sliding door by the force of the pulling spring (7). The closer for a sliding door according to claim 1, wherein the damper case (9) for accommodating the damper (8) is provided, and the pull springs (7) are installed on both sides of the damper case (9). The cam holder (4), the trigger cam (5), and the push spring (6) are provided on the front end side and the rear end side of the outer case (3) in opposite directions, respectively, of the outer case (3). Each cam holder (4), trigger cam (5), and push spring (6) on the front end side and the rear end side constitutes a closer for closing operation buffer and a closer for opening operation buffer of the sliding door, and the closing operation thereof. The sliding door closer according to claim 1 or 2, wherein the pull spring (7) and the damper (8) of the cushioning closer and the opening operation buffering closer are the same. The cam holder (4), the trigger cam (5), and the push spring (6) are provided on the tip end side of the outer case (3), and the cam holder (4), the trigger cam (5), and the push spring (6) are provided. 6) and the pull spring (7) and the damper (8) form a closer for closing the sliding door, and the damper (8) is attached to the outer case (3) at the rear of the outer case (3). The sliding door closer according to claim 1 or 2, which is detachably fixed to the door. The door roller holder (2b) is either a door roller holder having a grooved door roller or a door roller holder having a grooveless door roller, and the door roller holder having a grooved door roller and the door roller holder having a grooveless door roller are the outer case ( The sliding door closer according to any one of claims 1 to 4, wherein the connection portion to 3) has a common design and is selectively and detachably attached to the outer case (3). When the closer bends due to the pushing force of the door roller holder (2b), the door roller holder (2a) comes into contact with the raceway surface (Os) of the sliding door rail near the trigger cam (5) together with the door roller holder (2a). The sliding door closer according to any one of claims 1 to 5, which is provided with a protrusion (11) for supporting (2b). When the relative movement of the trigger cam (5) and the outer case (3) should be locked and the lock is not made, the sliding door (SD) is opened and closed to return to the locked state. The sliding door closer according to any one of claims 1 to 6, further comprising a malfunction recovery mechanism (30). The malfunction recovery mechanism (30) includes an error release cam (31) that can rotate around a support shaft (33) provided on the trigger cam (5) as a fulcrum, and the error release cam (31). The error release cam (31) is reduced between the trigger cam (5) and the trigger cam (5) with respect to the rotation direction of the trigger cam (5) by the push spring (6). The error release cam (31) includes a second push spring (32) that is pressed in the opposite direction and has a weaker force than the push spring (6), and the sliding door (SD) moves toward the closed end point or the open end point. When moving, the cam surface (31c) pushed down by the trigger and the cam surface (31c) are pushed down to pass the trigger installation point, and when the sliding door reverses, the force of the second push spring (32) is used. A hole provided in the outer case (3) at a position where the first protrusion (31b) that returns to the original position and is fastened to the trigger and the ear portion (5b) of the trigger cam enter the recess (2c). The sliding door closer according to claim 7, which has a second protrusion (31d) that penetrates (3d). The closer for a sliding door according to any one of claims 1 to 8, wherein the pull spring (7) is covered with a resin cylinder (12) having a length that does not hinder the expansion and contraction of the pull spring (7). ..

Images