JP2007277824A - Shock absorber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shock absorber having an adjusting mechanism capable of easily adjusting braking force acting on an opening-closing member such as a sliding door with a simple configuration. <P>SOLUTION: The shock absorber has a latch 152 for generating the braking force by friction corresponding to its turning quantity between a slider 151 slidably held in the moving direction of a stopper pin 201 of the sliding door 200 to a housing body 112 fixed to a rail 90 and a latch 152 moving together with the slider 151, turning when the stopper pin 201 abuts when closing the sliding door 200 and fixed to the housing body 112, and the adjusting mechanism 180 adjusting a turnable range of the latch 152. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an opening / closing device (sliding door device, opening device, drawer device, etc.) formed by holding an opening / closing member such as a sliding door or a drawer so that it can be moved relative to a fixed member such as a rail (sliding or rotating). A buffer mechanism is provided on one of the fixed member and the opening / closing member, and a buffer mechanism operating portion is provided on the other member. When the opening / closing member is closed, the buffer mechanism operating portion is brought into contact with the buffer mechanism to The present invention relates to a shock absorber configured to actuate a mechanism to buffer movement of an opening / closing member with respect to a fixed member.

Conventionally, as a shock absorber of this type, a brake plate fixed to a case body (fixing element), a pressing member provided so as to be able to come into contact with and separate from the brake plate, and a shock absorber actuating portion are rotated. A buffer member that presses the pressing member against the brake plate, the position of the brake plate can be adjusted in the width direction of the case body, and the size of the gap between the brake plate and the pressing member can be adjusted to meet the weight of the opening and closing member There is known a shock absorber that can adjust the braking force. (See Patent Document 1)
WO2005 / 068760A1

  However, in the conventional shock absorber described in Patent Document 1, since the braking force is adjusted by adjusting the position of the brake plate, which is a long member, the structure of the mechanism for adjusting the braking force is complicated and difficult to adjust. There was a problem.

  The present invention was devised in view of the above circumstances, and an object thereof is to provide a shock absorber provided with an adjustment mechanism that can easily adjust a braking force applied to an opening / closing member with a simpler configuration than the conventional one. There is to do.

  In order to achieve the above object, the shock absorber according to the present invention is a shock absorber mechanism in which the open / close member is movably held with respect to the fixed member, and either the fixed member or the open / close member is a shock absorbing mechanism. And the other member is provided with a buffer mechanism operating portion, and when the opening and closing member is closed, the buffer mechanism operating portion is brought into contact with the buffer mechanism, thereby operating the buffer mechanism and A shock absorber configured to cushion movement of the opening / closing member, wherein the shock absorber is slid in a moving direction of the shock absorber operating portion with respect to the fixed element and the fixed element. The sliding member held movably and the sliding member move together with the sliding member in the moving direction of the buffer mechanism operating unit. A buffer member that generates a braking force due to friction according to the amount of rotation between the fixed element or a member fixed to the fixed element, and an adjustment mechanism that adjusts a range in which the buffer member can rotate, Is provided.

  According to the shock absorber of the present invention configured as described above, the braking force applied to the opening / closing member can be easily adjusted by adjusting the range in which the buffer member can be rotated by the adjusting mechanism. Further, the configuration of the adjusting mechanism can be simplified as compared with the case where the braking force is adjusted by adjusting the position of the brake plate.

  In the shock absorber according to the present invention, the adjusting mechanism includes an adjusting member attached to the sliding member so as to be movable in a direction orthogonal to the sliding direction of the sliding member, and the adjusting member Preferably has a restricting portion that abuts against the buffer member and restricts its rotation, and the restricting portion is preferably provided stepwise or continuously facing the buffer member.

  According to the shock absorber of the present invention configured as described above, the range in which the shock absorber can be rotated can be easily adjusted stepwise or continuously by moving the adjusting member relative to the sliding member. Can do.

  Further, in the shock absorber according to the present invention, the adjustment mechanism includes an adjustment member rotatably provided on the sliding member, and the adjustment member abuts against the buffer member and restricts the rotation. It is desirable that the restricting portion be provided stepwise or continuously from the rotation center of the adjusting member.

  According to the buffer device of the present invention configured as described above, the range in which the buffer member can be rotated can be easily adjusted stepwise or continuously by rotating the adjustment member.

  According to the shock absorber of the present invention, the braking force applied to the opening / closing member can be easily adjusted with a simpler configuration than before, and can flexibly cope with variations in the weight of the opening / closing member and travelability. In other words, since the braking force applied to the opening / closing member can be adjusted according to the weight and travelability of the opening / closing member, the opening / closing member is roughly closed by applying sufficient braking force to various opening / closing members having different weights and traveling properties. Can be prevented.

  Hereinafter, the best mode for carrying out the present invention will be described.

[First Embodiment]
FIG. 1 is a perspective view illustrating a main part of an upper load type sliding door device as an opening / closing device provided with a shock absorber according to the present invention. FIG. 2 is an exploded perspective view of the main part of FIG. 3 and 4 are plan views showing a state where the back cover of the shock absorber is removed.

  In the sliding door device 100 shown in FIG. 1, the upper guide rail 90 of the upper and lower guide rails (the lower rail is not shown) is composed of two upper and lower rails, and the sliding door closer 110 is attached in the upper rail. ing. The sliding door 200 is supported in a state of being suspended via a support shaft 211 under a pair of left and right four-wheel carriages (traveling bodies) 210A and 210B that travel in the lower stage of the guide rail 90.

  Of the pair of four-wheel carriages 210A and 210B provided in the sliding door 200, an adapter 250 is attached to the four-wheel carriage 210A located on the sliding door closer 110 side.

  The adapter 250 includes a stopper pin (captured member) 201 and an adapter main body 251. The adapter main body 251 is a plate-shaped member having a U-shaped cross section, and the base end portion 251a is detachably fixed to the upper end portion of the carriage main body 210a and is supported in a cantilever state. The distal end 251 b side of the adapter main body 251 greatly extends in a direction away from the sliding door closer 110. In this example, the tip 251b of the adapter main body 251 extends to a position closer to the other (left side) four-wheel carriage 210B. And the stopper pin 201 is hold | maintained at the front-end | tip part 251b of the adapter main body 251. FIG.

  As shown in FIGS. 2 to 4, the sliding door closer 110 includes an elongated rectangular housing 111, a capture pull-in mechanism 120, and a buffer mechanism 140 (140 </ b> A, 140 </ b> B). The housing 111 includes a housing main body (fixing element) 112 fixed to the upper rail, and a flat plate-like back cover 113 that closes the upper opening of the housing main body 112. Mounting holes 146 and 147 for fixing the sliding door closer 110 to a fixing member such as a rail are provided at the front end portion and the rear end portion of the housing main body 112.

  The capture pull-in mechanism 120 includes a housing body 112 that is a fixed element, a capture body 150 that is slidable in the housing body 112 in the longitudinal direction, and biases the capture body 150 in the closing direction (right side) of the sliding door 200. Accordingly, a tension spring (elastic body) having one end (hereinafter referred to as “free end”) connected to the capturing body 150 and the other end (hereinafter referred to as “fixed end”) connected to the housing body 112 is preferably. ) 123, the elastic body holding member 161 that holds the fixed end of the tension spring 123 and is slidable with respect to the housing body 112, and the fixing position of the elastic body holding member 161 with respect to the housing body 112 is the expansion / contraction direction of the tension spring 123 And a retractable force adjusting mechanism 170 that can be adjusted steplessly.

  The capturing body 150 includes a slider (sliding member) 121 that slides within the housing main body 112, a latch (capturing member, buffer member) 122 that is attached to the slider 151 to capture the stopper pin 201, and the slider 151 as a sliding door. A tension spring (elastic body) 123 provided in a stretched state between the front end 121a of the slider 151 and the rear end 112a of the housing main body 112 so as to be biased in the closing direction (right side) of 200; It is equipped with.

  The slider 151 includes a main body portion 126 and an arm portion 127 extending forward from one end side of the main body portion 126. At the distal end portion of the arm portion 127, a holding portion 124 that holds the constricted portion 123a at the free end of the tension spring 123 is provided. The holding portion 124 includes a narrowing portion 124 a and a holding piece 124 b, and a guide wall 125 that guides the tension spring 123 extends from the narrowing portion 124 a to the main body portion 126 of the slider 151. The tension spring 123 is guided by the inner wall of the housing body 112 on the side of the holding piece 124b. The constricted portion 123 b at the fixed end of the tension spring 123 is connected to the housing main body 112 via the elastic body holding member 161 and the retracting force adjusting mechanism 170.

  A step portion 128 lower than the main body portion 126 is formed adjacent to the base end portion of the arm portion 127 at the distal end portion of the main body portion 126 of the slider 151, and a latch 152 is attached to the step portion 128. . A rotating shaft 122 a is integrally formed on the lower surface of the base portion of the latch 152. The rotating shaft 122 a is formed in the vicinity of the innermost part of the pin capturing part 152 a of the latch 152. On the other hand, the stepped portion 128 is formed with a shaft hole 135 that fits with the rotating shaft 122a of the latch 152. The latch 152 is supported so as to be rotatable in the horizontal direction by fitting the rotation shaft 122 a into the shaft hole 135 of the stepped portion 128. As will be described later, the base portion of the latch 152 also functions as a cam for operating the first buffer mechanism 140A.

  A slit-like stopper guide 118 that receives the stopper pin 201 and guides it to the pin catching portion 152 a of the latch 152 is formed on the bottom plate portion 116 of the housing body 112, and in parallel with the stopper guide 118, A slit-shaped latch guide 119 is formed to guide the guide protrusion 152b formed on the lower surface of the tip portion. At the front end of the housing body 112, a funnel-shaped stopper pin entrance / exit 148 that is enlarged forward is provided so that the stopper pin 201 can smoothly enter the stopper guide 118.

  The latch guide 119 has a straight portion 119a extending from the vicinity of the terminal end portion of the stopper guide 118 to the middle portion, and a bent portion 119b bent at a right angle therefrom. The bent portion 119b is provided to allow the latch 152 to rotate outwardly when the latch 152 captures or releases the stopper pin 201. The guide protrusion 152b enters the bent portion 119b of the latch guide 119.

  The latch 152 rotates inward when the stopper pin 201 that has moved in the closing direction (rightward direction) comes into contact, and captures the stopper pin 201. On the contrary, when the latch 152 releases the stopper pin 201, the stopper pin 201 moves the front inner surface of the latch 152 in the opening direction with the slider 151 moved to the maximum extension position of the tension spring 123. By pushing and turning the latch 152 outward, the catch of the stopper pin 201 by the latch 152 is released.

  The buffer mechanism 140 includes a first buffer mechanism 140A using a brake plate 132 and brake pads 136A and 136B that sandwich the brake plate 132, and a second buffer mechanism 140B using a rotary damper device 138.

  The brake plate 132 is a member made of an elongated metal plate whose one end is bent in an L shape, and the L-shaped end 132 a is formed in the vicinity of the front end in the housing main body 112. 145 is fitted and fixed. The other end side of the brake plate 132 extends to the rear end side of the housing body 112. The length of the brake plate 132 is selected to be longer than the stroke length of the slider 151.

  As shown in FIGS. 5 and 6, a locking groove 130 is formed near the front end of the main body 126 of the slider 151. A housing groove 133 that receives the brake plate 132 is formed in the main body 126 of the slider 151. A short portion of a pressing member 134 made of a metal plate bent in an L shape is inserted into the locking groove 130, and the long portion of the pressing member 134 is disposed between the side wall of the stepped portion 128 and the brake plate 132. Has been. A first brake pad 136A is attached to the surface of the pressing member 134 facing the brake plate 132 side. A second brake pad 136B made of a friction material is attached to the illustrated rear side wall 155 of the slider 151. The first brake pad 136A and the second brake pad 136B are opposed to each other with the accommodating groove 133 that receives the brake plate 132 interposed therebetween.

  A cam portion 158 that presses the pressing member 134 is formed at the base portion of the latch 152. When the door 200 is closed, the latch 152 is pushed by the stopper pin 201 and rotates inward (arrow A side), and the pressing member 134 is pressed by the cam portion 158. Accordingly, one surface of the brake plate 132 is pressed through the first brake pad 136A. At this time, the other surface of the brake plate 132 is in pressure contact with the second brake pad 136B. As a result, the brake plate 132 is held between the brake pads 136A and 136B, and the relative movement between the slider 151 and the housing 111 is buffered. As a result, the slider 151 and thus the sliding door 200 are braked.

  An adjustment mechanism 180 is provided between the latch 152 and the main body 126 of the slider 151 to adjust the range in which the latch 152 can rotate. The adjustment mechanism 180 includes a rotation restricting piece (adjustment member) 181. The rotation restricting piece 181 is accommodated in a piece accommodating portion 131 formed adjacent to the front end of the main body 126 so as to be movable in a direction perpendicular to the sliding direction of the slider 151. Arc-shaped engaging recesses 131b and 131c are formed at two locations in the base end side inner wall 131a of the piece accommodating portion 131 so as to be spaced apart in the horizontal direction. One engagement convex portion 181 a is formed on the rear end surface 181 of the rotation restricting piece 181. The rotation restricting piece 181 has its engaging convex portion 181a engaged with one of the engaging concave portions 131b and 131c according to its moving position, and is held at that position.

  The lower part of the piece housing part 131 is open to the stopper guide 118 as desired. An operation claw 184 (see FIG. 7) is provided on the lower surface of the rotation restricting piece 180. The operation claw 184 protrudes into the stopper guide 118. That is, the operation claw 184 is provided at a position that matches the portion opened below the rail 90 (the slit-shaped opening 91 through which the support shaft 211 of the four-wheel carriages 210A and 210B moves). The rotation restricting piece 180 can be moved by operating from the outside.

  The front end surface 183 of the rotation restricting piece 181 has a restricting portion 185 that contacts the latch 152 and restricts its rotation. The restricting portion 185 is provided in stages so as to face the latch 152. In this example, the front end surface 183 of the rotation restricting piece 181 is formed with a step having a convex surface 183a on one side in the horizontal direction and a concave surface 183b on the other side, and the convex surface 183a and the concave surface 183b are the restricting portions. 185 is configured. Then, according to the movement position of the rotation restricting piece 181, the edge 186 of the base of the latch 152 abuts on the convex surface 183 a or the concave surface 183 b of the rotation restricting piece 181, and rotates inward (arrow A side) of the latch 152. The movement is regulated. In FIG. 5, the edge 186 of the base end portion of the latch 152 is in contact with the concave surface 183 b of the rotation restricting piece 181. At this time, the latch 152 is rotated inward (arrow A side) as much as possible. On the other hand, in FIG. 6, the edge 186 of the base end portion of the latch 152 is in contact with the convex surface 183 a of the rotation restricting piece 181, so that it is inward of the latch 152 (arrow A side) than in the case of FIG. The rotation range is limited.

  A support shaft 137 is erected on the rear end portion of the main body 126 of the slider 151. A sleeve-like bearing 138 a of a rotary damper 138 is attached to the support shaft 137. A pinion 139 is fixed to the rotary shaft of the rotary damper 138. The teeth of the pinion 139 are rotatable about a support shaft 137 so that the teeth of the rack 141 formed on the inner wall surface of the housing main body 112 can be engaged with each other. The rotary range of the rotary damper 138 is restricted on the one hand by the stopper 142 protruding from the rear end of the slider and on the other hand at the rear end edge of the main body 126 of the slider 151.

  The rotary damper 138 is provided with a sliding friction shaft 149. The sliding friction shaft 149 is provided closer to the rack 141 than the region through which the support shaft 137 that is the rotation fulcrum of the rotary damper 138 passes. The sliding friction shaft 149 is in sliding contact with the inner surface of the back cover 113 of the housing 111. When the slider 151 moves relative to the housing 111, the rotary damper 138 moves along with the movement of the slider 151, and friction is generated between the sliding friction shaft 149 provided on the rotary damper 138 and the inner surface of the back cover 113 of the housing 111. appear. Due to this frictional force, when the slider 151 is moved to the rear end side of the housing 111, the rotary damper 138 is rotated around the support shaft 137 in the direction in which the pinion 139 and the rack 141 are engaged with each other. On the other hand, when the slider 151 is moved to the front end side of the housing 111, the rotary damper 138 is rotated around the support shaft 137 in a direction opposite to the direction in which the pinion 139 and the rack 141 are engaged. You can move while keeping the position.

  The back cover 113 is formed with a pressing piece 115 that elastically presses the sliding friction shaft 149 at a position where the sliding friction shaft 149 of the rotary damper 138 stops when the slider 151 reaches the front end side movement limit position of the housing 111. Has been. The pressing piece 115 protrudes slightly below the lower surface of the back cover 113 and is formed to be elastically deformable in the vertical direction. Due to the presence of the pressing piece 115, when the slider 151 is moved from the front end side movement limit position of the housing 111 to the rear end side, the pinion 139 and the rack 141 are immediately engaged with the rotary damper 138 about the support shaft 137. By rotating in the direction, the braking force by the rotary damper 138 can be applied reliably.

  The elastic body holding member 161 has a substantially rectangular parallelepiped shape that is slidable and non-rotatable in the expansion / contraction direction of the tension spring 123 between the inner surface 114a of the housing 111 and the rear surface 141a of the wall on which the rack 141 is formed. It is a member. At the front end portion of the elastic body holding member 161, a holding portion 161 a that holds the constricted portion 123 b of the fixed end of the tension spring 123 is formed. At the rear end of the elastic body holding member 161, a holding portion 161b that holds the flange portion 171a formed at the tip of the rod screw member 171 that is a component of the pull-in force adjusting mechanism 170 is formed. . That is, the elastic body holding member 161 functions as a connecting member that connects the fixed end of the tension spring 123 and the retracting force adjusting mechanism 170. The holding part 161b of the elastic body holding member 161 holds the flange part 171a of the rod screw member 171 in a non-rotatable manner.

  The pull-in force adjusting mechanism 170 includes a bar screw member 171 and a gear mechanism 172 that moves the bar screw member 171 forward and backward in the extending and retracting direction of the tension spring 123. The gear mechanism 172 is a gear mechanism having a so-called worm gear structure that includes a wheel 173 that is threadedly engaged with the rod screw member 171 and a worm 174 that meshes with the wheel 173.

  The wheel 173 is accommodated in a wheel accommodating portion 175 formed in the housing main body 112 and is held so as to be able to rotate at a fixed position around the central axis of the rod screw member 171. The worm 174 is accommodated in a worm accommodating portion 176 formed in communication with the wheel accommodating portion 175 in the housing main body 112, and is held so that it can rotate at a fixed position around an axis perpendicular to the bottom plate portion 116 of the housing main body 112. Has been. The bottom plate portion 116 of the housing 111 is formed with an operation hole through which a tool such as a Phillips screwdriver or a flat screwdriver can be inserted so as to communicate with the worm accommodating portion 176. The operation hole is formed at a position that can be seen through the slit-shaped opening 91 of the rail 90 in a state in which the shock absorber 110 is attached to the rail 90, and the end surface portion 174a of the worm 174 is exposed through the operation hole. Grooves (plus groove, minus groove, etc.) that engage with the tool are formed in the end surface portion 174a of the worm 174, and the worm 174 can be rotated from the outside of the housing 111 by using the tool. It is like that.

  When the worm 174 is rotated, the wheel 173 engaged therewith rotates. When the wheel 173 rotates, the rod screw member 171 screwed with the wheel 173 moves in the axial direction, that is, in the expansion / contraction direction of the tension spring 123. Along with this, the elastic body holding member 161 also moves in the expansion / contraction direction of the tension spring 123. That is, the position of the fixed end of the tension spring 123 changes. As a result, the tension of the tension spring 123 changes. The moving direction of the rod screw member 171 can be changed depending on the direction in which the worm 174 is rotated. Further, the amount of movement of the rod screw member 171 can be adjusted steplessly by adjusting the amount of rotation of the worm 174. Therefore, by rotating the worm 174, the fixing position of the elastic body holding member 161 holding the fixed end of the tension spring 123 is changed steplessly, and the pulling force of the sliding door 200 by the tension spring 123 is increased. The height can be adjusted steplessly.

  Next, the operation of the shock absorber 110 configured as described above will be described with reference to FIGS.

  FIG. 3 shows a state immediately before the stopper pin 201 is captured by the latch 152. At this time, the guide protrusion 152 b of the latch 152 is engaged with the bent portion 119 b of the latch guide 119 of the housing body 112. When the stopper pin 201 further moves in the closing direction (right direction) from the state of FIG. 3, the stopper pin 201 is captured by the latch 152. At this time, the latch 152 is pushed by the stopper pin 201 and pivots inward (in the direction of arrow A in FIGS. 5 and 6), so that the guide protrusion 152b of the latch 152 is detached from the bent portion 119b of the latch guide 119. And move to the straight line portion 119a. Thereby, the engagement of the capturing body 150 with the housing main body 112 is released, and the pulling of the slider 151 by the pulling force of the tension spring 123 is started. When the slider 151 is moving in the closing direction (right side), the relative movement between the slider 151 and the housing 111 is buffered by the first and second buffer mechanisms 140A and 140B constituting the buffer mechanism 140. Thereby, it can prevent that the sliding door 200 is closed violently. Then, as shown in FIG. 4, when the slider 151 reaches the movement limit position in the closing direction (right side), the movement of the stopper pin 201 and thus the sliding door 200 stops. At this time, the sliding door 200 is completely closed (closed state). Even after the stopper pin 201 stops at the end of the latch guide 119, the stopper pin 201 is kept in the state of being captured by the latch 152.

  When the sliding door 200 is opened from the state of FIG. 4, the slider 151 including the latch 152 that captures the stopper pin 201 also moves in the opening direction (left side in the illustrated example). At this time, since the rotary damper 138 rotates in the direction opposite to the direction in which the rack 141 and the pinion 139 mesh with each other, the buffer mechanism 140 does not operate at all. When the slider 151 reaches the movement limit position in the opening direction (left side), the latch 152 is rotated outward by the stopper pin 201, so that the catch of the stopper pin 201 by the latch 152 is released at the same time. The guide protrusion 152b of the latch 152 moves from the straight portion 119a of the latch guide 119 to the bent portion 119b, and the housing main body 112 and the capturing body 150 are engaged with each other, that is, the state shown in FIG.

  According to the shock absorber 110 of the first embodiment configured as described above, the latch 152 functioning as a cam for operating the first shock absorber 140A by switching the position of the rotation restricting piece 181. Since the rotatable range can be switched stepwise, the braking force applied to the sliding door 200 by the first buffer mechanism 140A can be easily adjusted stepwise. Therefore, it is possible to flexibly cope with variations in the weight of the sliding door 200 and travelability. That is, since the braking force applied to the sliding door 200 can be adjusted according to the weight and traveling property of the sliding door 200, the sliding door 200 is roughly closed by applying sufficient braking force to various sliding doors 200 having different weights and traveling properties. Can be prevented. Since the operation claw 184 for operating the rotation restricting piece 180 is formed at a position where it can be seen through the slit-like opening 91 of the rail 90, the first buffer mechanism 140A is attached with the shock absorber 110 attached to the rail 90. The braking force for the sliding door 200 can be easily adjusted. When the sliding door 200 is closed, the first buffering mechanism 140A exerts a buffering effect by applying a braking force to the sliding door 200 particularly at an early stage. Therefore, the buffering device 110A is switched by switching the position of the rotation restricting piece 181. It is possible to adjust the buffer effect at the initial stage where the buffer effect is exhibited.

  Further, according to the shock absorber 110 of the first embodiment, by rotating the worm 174, the fixing position of the elastic body holding member 161 holding the fixing end of the tension spring 123 is changed steplessly. Therefore, the strength of the pulling force of the sliding door 200 by the tension spring 123 can be easily adjusted steplessly, and fine adjustment is also possible. Therefore, it is possible to flexibly cope with variations in running performance of the sliding door 200. That is, since the pulling force of the sliding door 200 by the tension spring 123 can be adjusted according to the traveling property of the sliding door 200, the sliding door 200 is reliably closed by applying sufficient pulling force to various sliding doors 200 having different traveling properties. be able to. Since the operation hole for rotating the worm 174 from the outside is formed at a position that can be seen through the slit-shaped opening 91 of the rail 90, the sliding door 200 by the tension spring 123 with the shock absorber 110 attached to the rail 90. Can be easily adjusted steplessly.

  In the above embodiment, the cam portion 158 of the latch 152 presses the brake plate 132 via the pressing member 134 and the first brake pad 136A. However, the cam portion 158 of the latch 152 directly It is good also as a structure which presses the inner surface 114b of the housing main body 118. FIG.

[Second Embodiment]
FIG. 8 is an exploded perspective view showing a main part of a second embodiment of the shock absorber according to the present invention. Here, the same reference numerals are given to the same or functionally common components as in the first embodiment, and the description thereof will be omitted as appropriate.

  The adjusting mechanism 180 according to the second embodiment includes a rotation restricting piece (adjusting member) 181 and an adjusting screw 191. The rotation restricting piece 181 is provided in the piece receiving portion 131 of the slider 151 in the vertical direction (direction parallel to the rotation center axis of the latch 152). A slit 187 is formed in the lower portion of the front end of the rotation restricting piece 181. By fitting the slit 187 into the front end wall 131a of the piece containing portion 131, the rotation restricting piece 181 is rotated and rattled. Is preventing.

  A female screw hole 188 is formed in the vicinity of the rear end of the rotation restricting piece 181 so as to penetrate in the vertical direction. A through-hole (not shown) is formed in the bottom of the piece housing portion 131, and the male screw portion 192 of the adjusting screw 191 is inserted into the through-hole from below and screwed into the female screw hole 188 of the rotation restricting piece 181. is doing. A disk-shaped head portion 193 is integrally provided at the lower end of the male screw portion 192. The head portion 193 is rotatably accommodated in a circular recess (not shown) formed on the lower surface portion of the slider 151. Yes. The concave portion is formed at a position that can be seen through the slit-like opening 91 of the rail 90 in a state where the shock absorber 110 is attached to the rail 90, and the head portion 193 is exposed through the opening of the concave portion. Then, the adjusting screw 191 is rotated forward and backward using a tool such as a screwdriver to adjust the screwed state of the male screw portion 192 with respect to the rotation restricting piece 181 (the length of the male screw portion 192 entering the female screw hole 188). By doing so, the rotation restricting piece 181 can be moved up and down and held at an arbitrary position (height).

  The front end surface 189 of the rotation restricting piece 181 has a tapered surface whose upper end protrudes forward (to the latch 152 side), and functions as a restricting portion 185 that contacts the latch 152 and restricts its rotation. On the other hand, a taper surface 159 is formed at the rear end portion of the latch 152 so as to be adjacent to the cam portion 158 and the lower end protrudes most rearward (to the rotation restricting piece 181 side). It comes into contact with the restricting portion 185 of the movement restricting piece 181.

  According to the configuration of the second embodiment, by rotating the adjusting screw 191 forward and backward, the rotation restricting piece 181 can be moved up and down to adjust the position to an arbitrary position (height). By adjusting the position of the rotation restricting piece 181, the pivotable range of the latch 152 that functions as a cam for operating the first buffer mechanism 140 </ b> A can be adjusted, and thus the sliding door 200 by the first buffer mechanism 140 </ b> A. The braking force against can be easily adjusted steplessly. Therefore, it is possible to flexibly cope with variations in the weight and running performance of the sliding door 200, and fine adjustment is possible. Therefore, it is possible to respond more flexibly to variations in the weight of the sliding door 200 and travelability. Since the adjusting screw 191 for adjusting the position of the rotation restricting piece 181 from the outside is disposed at a position where the adjusting screw 191 can be operated through the slit-shaped opening 91 of the rail 90, the sliding door is mounted with the shock absorber 110 attached to the rail 90. The braking force by the buffer mechanism 140 for 200 can be easily adjusted steplessly.

[Third Embodiment]
9 and 10 are views showing a third embodiment of the shock absorber according to the present invention. These drawings are plan views showing a state in which the back cover of the shock absorber is removed. Here, the same reference numerals are given to the same or functionally common components as in the first embodiment, and the description thereof will be omitted as appropriate.

  The buffer mechanism 150 of the third embodiment is a flat plate slidably provided in the movement direction of the stopper pin 101 serving as the buffer mechanism operating portion (longitudinal direction of the housing body 112) in the housing body 112 serving as the fixed element. And a flat plate-like latch (capturing member) 303 attached to the slider 301 so as to be rotatable.

  The slider 301 slides with its both side surfaces in sliding contact with both inner side surfaces 114 a and 114 b of the housing body 112. Both the slider 301 and the latch 303 are resin molded products made of synthetic resin. The latch 303 is formed with a capturing portion 302 that captures the stopper pin 101. A pin introduction path 304 for introducing the stopper pin 101 into the catching portion 302 is formed at the center of the front end of the slider 301 so as to overlap the catching portion 302 of the latch 303. When the sliding door 200 is closed, the stopper pin 101 is introduced into the capturing part 302 through the pin introduction path 304 and captured. The capturing part 302 has a structure that can hold and hold the stopper pin 101 so as to be disengageable using the flexibility of the synthetic resin. That is, the catching portion 302 is connected to the stopper pin 101 so that the slider 301 and the latch 303 can move together with the stopper pin 101 when the sliding door 200 is opened.

  A stepped portion 307 having a height substantially equal to the thickness of the latch 303 is formed in a region near the side edge 301 a of the rear end portion of the slider 301. A cut groove 308 extending inward from the side edge 301a side is formed in the stepped portion 307, and a piece 309a of a pressing member 309 made of a metal plate bent in an L shape is inserted into the cut groove 308. . The other piece 309b of the pressing member 309 is accommodated in a notch 310 formed from the entrance of the notch groove 308 to the front end of the step 307, and its tip 312 is further forward (right side in the figure) than the front end of the step 307. It extends to. A brake pad 311 is attached to the surface of the pressing member 309 facing the inner surface 114b of the housing main body 112.

  The latch 303 extends from the central portion of the slider 301 to the vicinity of one side edge 301a. A shaft hole 305 is formed in the vicinity of the corner on the rear end side of the latch 303 on the side edge 301a side. On the other hand, a support shaft 306 protrudes near the side edge 301 a of the slider 301. The support shaft 306 is provided on the rear end side (the right side in the drawing) from the innermost part of the pin introduction path 304. A shaft hole 305 of the latch 303 is rotatably fitted to the support shaft 306. That is, the latch 303 can be rotated around the support shaft 306. Then, the latch 303 is pushed by the stopper pin 101 and is rotated in the direction of the arrow A in the figure, whereby the edge portion 313 of the latch 303 comes into contact with the pressing member 309 and the brake pad 311 is moved through the pressing member 309. The housing body 112 is pressed against the inner surface 114b. At this time, the stopper pin 101 and thus the sliding door 200 are braked by the frictional force generated between the brake pad 311 and the inner side surface 114b of the housing main body 112.

  In the vicinity of the rear end of the slider 301, an adjustment mechanism 180 that adjusts the range in which the latch 303 can rotate is provided. The adjusting mechanism 180 includes an adjusting member 321 that is rotatably provided on the slider 301 and a screw 325 for fastening and fixing the adjusting member 321 to the slider 301. The adjustment member 321 is a disk-shaped member, and is accommodated in an approximately circular adjustment member accommodation portion 322 formed in the step portion 307 of the step portion 307 so as to be eccentrically rotatable. The outer peripheral surface of the adjusting member 321 functions as a restricting portion 321a that contacts the latch 303 and restricts its rotation. At the front end 307 a of the stepped portion 307, an opening 323 for allowing the adjusting member 321 to protrude and retract toward the latch 303 is formed so as to communicate with the adjusting member accommodating portion 322.

  A screw hole (not shown) is formed at the center of the bottom of the adjustment member housing portion 322. On the other hand, the adjusting member 321 has a screw insertion hole (not shown) formed at an eccentric position. The adjustment member 321 is fixed to the slider 301 in a state of being accommodated in the adjustment member accommodating portion 322 by inserting the screw 325 through the screw insertion hole, screwing the screw 325 into the screw hole of the adjustment member accommodating portion 322, and tightening. ing. The adjustment member 321 can be rotated by loosening the screw 325.

  The adjustment member 321 is a disk-shaped member, and the rotation center thereof, that is, the center of the screw insertion hole is eccentric. Therefore, by rotating the adjustment member 321, the restricting portion 321 a appears and disappears from the front end 307 a of the step portion 307. The amount can be adjusted steplessly. When the screw 325 is tightened, the screw is fixed to the slider 301 in a state where the amount of the restriction portion 321a at that time is maintained.

  According to the configuration of the third embodiment, by rotating the adjustment member 321, the amount of protrusion / recession of the restriction portion 321 a from the front end 307 a of the step portion 307 in which the adjustment member 321 is accommodated is adjusted steplessly. be able to. That is, by rotating the adjustment member 321, the relative position between the latch 303 and the restriction portion 321 a of the adjustment member 321 can be adjusted steplessly. By adjusting the relative position, the pivotable range of the latch 303 that functions as a cam for operating the buffer mechanism 140 can be adjusted. Therefore, the braking force applied to the sliding door 200 by the buffer mechanism 140 can be easily and continuously adjusted. . Therefore, it is possible to flexibly cope with variations in the weight and running performance of the sliding door 200, and fine adjustment is possible. Therefore, it is possible to respond more flexibly to variations in the weight of the sliding door 200 and travelability. FIG. 9 shows a state in which the strength of the braking force acting on the sliding door 200 is adjusted to be the smallest. FIG. 10 shows a state in which the strength of the braking force acting on the sliding door 200 is adjusted to be the largest.

  In the above example, the device configuration including the adjusting member 321 having the smooth outer peripheral surface as the restricting portion 321a has been described. However, the adjustment having the restricting portion that is eccentric in stages by forming a step on the outer peripheral surface. If the member 321 is used, the range in which the latch 303 as the buffer member can be rotated can be easily adjusted stepwise. According to this configuration, by rotating the adjustment member 321, the braking force applied to the sliding door 200 by the buffer mechanism 140 can be easily adjusted stepwise.

  In the above embodiment, the edge portion 313 of the latch 303 presses the brake pad 311 against the inner side surface 114b of the housing main body 118 via the pressing member 309. However, the edge portion 313 of the latch 303 corresponds to the housing main body 118. It is good also as a structure which presses the inner surface 114b.

[Other Embodiments]
In the said embodiment, although the buffer device 110 of this invention was provided in the upper end part of the sliding door 200, the buffer device 110 of this invention can also be provided in the lower end part of the sliding door 200. FIG.

  Moreover, in the said embodiment, although the stopper pin 201 was attached to the sliding door 200 and the example which attached the sliding door closer 110 to fixing members, such as the rail 90, the stopper pin 201 was attached to the fixing member on the contrary, The sliding door closer 110 may be attached to the sliding door 200.

  The shock absorber of the present invention can also be effectively used as a shock absorber for other opening / closing devices such as hinged door devices and drawer devices.

The perspective view which illustrates the principal part of the upper load type sliding door device as a switchgear provided with the buffer device of the present invention. 1 is an exploded perspective view of the main part of FIG. The top view which shows the state which removed the back cover of the buffering device of the 1st Embodiment of this invention The top view which shows the state which removed the back cover of the buffering device of the 1st Embodiment of this invention Enlarged view of main parts of shock absorber Enlarged view of main parts of shock absorber Partial bottom view of shock absorber The principal part disassembled perspective view of the shock absorber of the 2nd Embodiment of this invention. The top view which shows the state which removed the back cover of the buffering device of the 3rd Embodiment of this invention. The top view which shows the state which removed the back cover of the buffering device of the 3rd Embodiment of this invention.

Explanation of symbols

90 Guide rail 100 Sliding door device 110 Sliding door closer (buffer device)
112 Housing body (fixing element)
112c Operation hole 116 Bottom plate portion 118 Stopper guide 119 Latch guide 120 Capture / retraction mechanism 121 Slider (sliding member)
122a Rotating shaft 123 Tension spring (elastic body)
131 Piece receiving part 131b Engaging recess 131c Engaging recess 132 Brake plate (member fixed to fixing element)
134 Pressing member 135 Shaft hole 136A First brake pad 136B Second brake pad 138 Rotary damper 140 Buffer mechanism 140A First buffer mechanism 140B Second buffer mechanism 152 Latch (buffer member)
152a Pin capture portion 158 Cam portion 180 Adjustment mechanism 181 Rotation restriction piece (adjustment member)
181a Engaging convex portion 183a Convex surface 183b Concave surface 184 Operation claw 185 Restricting portion 188 Female screw hole 191 Adjustment screw 192 Male screw portion 193 Head portion 201 Stopper pin (member to be captured)
301 Slider (sliding member)
302 Capture part 303 Latch (capture member)
304 Pin introduction path 305 Shaft hole 306 Support shaft 307 Step portion 309 Pressing member 311 Brake pad 321 Adjustment member 321a Restriction portion 322 Adjustment member accommodation portion 323 Opening portion 325 Screw

Claims (3)

In the opening / closing device that holds the opening / closing member movably with respect to the fixing member, a buffer mechanism is provided on one of the fixing member and the opening / closing member, and a buffer mechanism operating portion is provided on the other member, A shock absorber configured to actuate the buffer mechanism to buffer the movement of the open / close member relative to the fixed member by bringing the buffer mechanism operating portion into contact with the buffer mechanism when the open / close member is closed. And
The buffer mechanism is
A fixing element fixed to the one member;
A sliding member held so as to be slidable in the moving direction of the buffer mechanism operating portion with respect to the fixed element;
When the opening and closing member is moved together with the sliding member in the moving direction of the buffer mechanism actuating portion, the buffer mechanism actuating portion is rotated to come into contact with the fixed member or the fixed element. A buffer member that generates a braking force by friction according to the amount of rotation between the member and the member;
And a adjusting mechanism for adjusting a range in which the buffer member can be rotated. The adjusting mechanism is
An adjusting member is attached to the sliding member so as to be movable in a direction perpendicular to the sliding direction of the sliding member, and the adjusting member contacts the buffer member and rotates. 2. The shock absorber according to claim 1, further comprising a restricting portion for restricting, wherein the restricting portion is provided stepwise or continuously facing the buffer member. The adjusting mechanism is
The sliding member includes an adjustment member that is rotatably provided. The adjustment member has a restricting portion that abuts the buffer member and restricts the rotation, and the restricting portion rotates the adjusting member. 2. The shock absorber according to claim 1, wherein the shock absorber is provided stepwise or continuously from an eccentric center.