JP6427543B2 - Door closer with interior stop device - Google Patents

Description

  The present invention relates to a door closer provided with an interior stop device.

  As stop devices for stopping the door at a predetermined opening angle, there are an exterior type provided on a link connected to the door closer main body and an interior type provided on the inside of the door closer main body. The interior type stop device has an advantage that a good appearance can be obtained because the stop device can not be seen from the outside, and the applicant has already made the door closer provided with this interior type stop device as in Patent Document 1 below. It has been proposed. The door closer body includes a slider between a main spring and a main shaft for generating a closing force. The slider is pressed to the main shaft by a main spring, and a roller is attached to the slider. The main shaft is provided with a cam having a recess, and when the door is opened, the cam rotates integrally with the main shaft. Then, when the door reaches a predetermined opening angle, the roller is engaged with the recess of the cam and the door is held in the open state.

  In such a door closer, since the main spring presses the roller against the cam via the slider, it is impossible to adjust the holding force for holding the door at a predetermined opening angle. In addition, if the roller is engaged with the concave portion of the cam in an incomplete state by pushing in the screw as the switching means which pushes the slider to the main spring side, the roller completely engages with the concave portion of the cam It is possible to reduce the holding power relative to However, although the holding force can be reduced, it can not be made larger. In addition, if the amount of engagement between the roller and the recess is reduced to reduce the holding force, rattle in the rotational direction of the cam is likely to occur between the roller and the recess, and as a result, the stopped door opens and closes. It becomes easy to shake in the direction.

Patent No. 3817441 gazette

  Therefore, the present invention is made in view of the above-mentioned conventional problems, and it is possible to stably hold the door in the open state and to adjust the holding force to hold the door in the open state. An object is to provide a door closer with a device.

The present invention has been made to solve the above problems, and a door closer with an interior stop device according to the present invention is a door closer with an interior stop device, including a door closer body for interiorly mounting the stop device. The door closer body includes a main shaft that rotates with opening and closing of the door, a main spring for generating a closing force, and a housing, and the stop device rotates integrally with the main shaft and has an engagement recess on the outer peripheral surface An engagement member having a cam, an engagement convex portion engageable with an engagement recess of the cam, a stop spring for pressing the engagement member toward the cam, and a spring force of the stop spring are adjusted and a spring force adjustment member for engaging member and the stop spring and the spring force adjustment member, around the main shaft, the main spring is disposed on the side opposite to the, end face of the spring force adjusting member Howe Is exposed from the ring to the outside, characterized in that it can adjust the spring force by manipulating the spring force adjusting member from the outside of the housing.

  The door closer with the built-in type stop device of this configuration is provided with a stop spring for pressing the engagement member toward the cam side separately from the main spring. Then, the spring force of the stop spring can be adjusted by the spring force adjustment member. When the spring force of the stop spring is increased, the pressing force for pressing the engaging member toward the cam increases, and the holding force of the door increases. On the other hand, when the spring force of the stop spring is reduced, the pressing force for pressing the engaging member toward the cam decreases, and the holding force of the door decreases.

  In particular, both the main spring and the stop spring are coil springs, and when viewed from the direction of the center line of the main axis, the center line of the main axis is offset in the front and rear direction with respect to the center line of the main spring. Preferably, the centerline of the main axis is located on the extension of the centerline. When the center line of the main shaft is offset in the front-rear direction with respect to the center line of the main spring, for example, when the main spring is compressed by a rack and a pinion, the rack can be easily made opposite to the front and rear offset sides of the main shaft The door closer can be prevented from being enlarged in the front-rear direction. On the other hand, when the center line of the main shaft is located on the extension of the center line of the stop spring, the engagement member can be pressed radially with respect to the cam, and the engagement recess of the cam and the engagement member The engagement operation with the engagement convex portion and the engagement release operation become smooth, and the holding state of the door is also stabilized.

  Preferably, the door closer body includes a housing, and the engaging member, the stop spring and the spring force adjusting member are incorporated in a casing separate from the housing, and preferably mounted on the housing via the casing. . The engaging member, the stop spring, and the spring force adjusting member may be directly assembled to the housing, but in such a case, it becomes an operation of assembling the respective members one by one in the housing. On the other hand, in the configuration in which the engaging member, the stop spring, and the spring force adjusting member are installed in the casing, the engaging member, the stop spring, and the spring are separately provided to the casing. The force adjustment member can be assembled and integrated into a unit. Then, by assembling the unit into the housing, the assembly work can be made more efficient.

  In that case, it is particularly preferable that the casing is movably mounted to the housing, and the stop device can be switched ON / OFF by moving the casing relative to the housing. In this case, since the unit can be moved relative to the housing in units of units described above, the switching operation is easy and, for example, even if the stop device is switched from the OFF state to the ON state, the stop device is stably and reliably Operate.

  The engaging member, the stop spring, and the spring force adjusting member are preferably disposed on the opposite side of the main spring with respect to the main shaft, so that these members can be easily installed in the door closer body, and the door closer The outer shape of the main body can also be made compact.

  Also, when the door is closed, the engagement convex portion is separated from the cam, and when the door opens, the engagement convex portion starts to abut the cam before the engagement convex portion engages with the engagement concave portion of the cam Is preferred. If the engagement projection is not in contact with the cam during a certain section after the door is closed, instead of the engagement projection being always in contact with the cam, the durability of the engagement projection or the cam As a result, the noise generated between the engagement projection and the cam can also be suppressed.

  As described above, since the spring force of the stop spring provided separately from the main spring is adjusted, the spring force of the stop spring is adjusted without changing the amount of engagement between the engagement projection and the engagement recess. By doing this, the holding power of the door can be adjusted, and therefore, even if the holding power of the door is adjusted, the door can be held in a stable state.

Sectional drawing which looked at the door closer main body of the door closer in one Embodiment of this invention from the bottom side. Sectional drawing which looked at the same door closer main body from the front side. 1. AA sectional view taken on the line of FIG. It is principal part sectional drawing corresponding to FIG. 1 which shows the use condition of the same door closer body, (a) shows the state when hold | maintaining a door at a 1st opening angle, (b) shows a door 2nd The state when holding at the opening angle is shown. It is principal part sectional drawing corresponding to FIG. 1 which shows the use condition of the same door closer body, (a) shows a state when retention power is set to the maximum, (b) shows the retention power when set to the minimum Indicates the state of It is principal part sectional drawing corresponding to FIG. 1 which shows the door closer main body of the door closer in other embodiment of this invention, Comprising: (a) shows the state of ON of stop device, The state of stop device OFF of (b) Indicates

  Hereinafter, a door closer with an interior stop device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. The door closer according to the present embodiment includes a door closer main body 1 as shown in FIGS. The door closer body 1 includes a housing 2, a main shaft 3, a piston 4, a main spring 5, a rack 6, a pinion 7, a cam 8, an engagement ball 9, a stop spring 10, and a spring force adjustment member 11. Is equipped. The cam 8, the engagement ball 9 and the stop spring 10 constitute a stop device, which is incorporated in the door closer body 1.

  The door closer main body 1 is attached to a door or door frame (not shown) via a mounting plate 12. The mounting plate 12 is omitted in FIG. The door pivots about a vertical axis. For example, when the door closer 1 is attached to the door, a bracket (not shown) is attached to the door frame. The bracket and the main shaft 3 are connected, for example, via two links (not shown). In FIG. 1 and FIG. 2, the horizontal direction is indicated by a symbol X, the front-rear direction is indicated by a symbol Y, and the vertical direction is indicated by a symbol Z. In addition, let the attachment surface side of the door closer main body 1 attached to a door or a door frame be a back side (back side), and let the opposite side to an attachment surface be a front side (front side).

<Housing 2>
The housing 2 is a horizontally long rectangular solid which is long in the horizontal direction as a whole. The rear surface 2b of the housing 2 is a mounting surface facing the wall of the door, and the front surface 2a of the housing 2 is a counter mounting surface. The housing 2 is provided with a storage chamber 20 which extends horizontally, ie in the longitudinal direction of the housing 2. The storage chamber 20 is filled with hydraulic oil. The accommodation chamber 20 is opened at both end surfaces of the housing 2 in the horizontal direction, and is opened also on the upper surface and the lower surface of the housing 2 because the main shaft 2 vertically penetrates the housing 2. The opening on the left side of the storage chamber 20 is closed by the end plug 13, the opening on the right side of the storage chamber 20 is closed by a casing 16 described later, and the openings on the upper and lower surfaces of the storage chamber are bushes 14 and 15 described later, respectively. Is blocked by Further, the right end portion of the storage chamber 20 is an insertion hole 33 for inserting the casing 16, and the insertion hole 33 communicates with the other portion of the storage chamber 20.

<Spindle 3>
The main shaft 3 is pivotally supported by the housing 2 and rotates about an axis in the vertical direction. That is, the center line 3a of the main shaft 3 is in the vertical direction. The main shaft 3 is not located at the horizontal center of the housing 2 but at an eccentric position on one side in the horizontal direction. For convenience of explanation, one side in the horizontal direction is referred to as the right side, and the other side is referred to as the left side. Further, as shown in FIG. 1, the main shaft 3 is provided not at the center in the front-rear direction but at a position eccentric to one side in the front-rear direction. Specifically, the main shaft 3 is provided at a position offset to the rear side.

  The main shaft 3 penetrates the housing 2 up and down. That is, the spindle 3 penetrates the storage chamber 20 up and down. The main shaft 3 is rotatably supported by the housing 2 at upper and lower portions thereof via bushes 14 and 15, respectively. The upper end portion of the main shaft 3 projects upward from the upper surface of the housing 2, and the lower end portion of the main shaft 3 projects downward from the lower surface of the housing 2. The proximal end of a link (not shown) is attached to the upper end or lower end of the main shaft 3 so as not to be relatively rotatable. When the door pivots in the horizontal direction, the main shaft 3 rotates in accordance with the opening and closing operation. When the door is open, the spindle 3 rotates clockwise in FIG.

<Piston 4>
The piston 4 is accommodated in the accommodation chamber 20. The piston 4 is located inside the end plug 13. 1 and 2 show the door closed. The piston 4 is pushed to the left by the main spring 5 when the door is closed and abuts on the end plug 13. When the door is opened, the piston 4 moves to the right from the state of FIG. 1 and separates from the end plug 13 and approaches the main shaft 3. When the door closes, the piston 4 moves to the left and moves away from the main shaft 3 and approaches the end plug 13. The piston 4 slides while sliding on the wall surface of the storage chamber 20.

  The piston 4 is for pushing hydraulic fluid to a flow control channel (not shown) when the door is closed in order to buffer the operation when the door is closed. In the piston 4, a through hole is formed along the center line of the piston 4, and a check valve 21 is provided in the through hole. The check valve 21 allows the hydraulic oil to move from the right side to the left side of the piston 4 through the through hole, while preventing the hydraulic oil from moving from the left side to the right side of the piston 4 through the through hole. . Therefore, when the piston 4 moves to the right when the door opens, the ball which is the valve body of the check valve 21 moves to the left to open the valve, so that the hydraulic oil passes through the through hole of the piston 4 You can move from the right to the left. When the piston 4 moves to the left when the door closes, the ball of the check valve 21 is hydraulically pushed to the right to close the valve. Therefore, the hydraulic oil located on the left side of the piston 4 can not pass through the through hole, but is pushed by the piston 4 and flows to the flow control flow path which is a bypass.

<Main spring 5>
The main spring 5 is for generating a closing force. The main spring 5 is a coil spring. The main spring 5 is located on the right side of the piston 4 and the main spring 5 and the piston 4 are coaxial. The main spring 5 is located between the piston 4 and the main shaft 3, the left end of the main spring 5 abuts on the right end face of the piston 4, and the right end of the main spring 5 is a step of the storage chamber 20 of the housing 2 It is in contact with the part from the left side. When the piston 4 moves to the right when the door opens, the main spring 5 is pushed by the piston 4 and compressed. When the door closes, the main spring 5 pushes the piston 4 to the left.

  The main spring 5 and the piston 4 are located coaxially, and the center line 5a of the main spring 5 and the center line 4a of the piston 4 are located on the same straight line. The center line 5a of the main spring 5 is not located at the center of the housing 2 in the front-rear direction but is located on the front side eccentrically. Accordingly, the piston 4 is also the same, and the center line 4a thereof is eccentrically located on the front side. As mentioned above, since the main shaft 3 is eccentrically positioned on the rear side in reverse, when viewed in the direction of the center line 3a of the main shaft 3, that is, in a plan view or a bottom view, the center line 4a of the piston 4 and the main spring The center line 5a of 5 is displaced in the front-rear direction with the center line 3a of the main shaft 3, and the center line 4a of the piston 4 and the center line 5a of the main spring 5 are on the front side with respect to the center line 3a of the main shaft 3. positioned.

<Rack 6>
The rack 6 and the pinion 7 constitute a drive mechanism for moving the piston 4 with the rotation of the main shaft 3. The rack 6 is rod-shaped and is inserted through the inside of the main spring 5. The left end of the rack 6 is connected to the piston 4 by a pin 22, and the rack 6 and the piston 4 move integrally. The right end of the rack 6 projects a predetermined length to the right of the right end of the main spring 5 when the door is closed as shown in FIG. A tooth portion 23 is formed at the right end of the rack 6. A tooth portion 23 is formed on a rear surface 6 b which is a surface on the main shaft 3 side among the front and rear surfaces of the right end of the rack 6. A groove 24 is formed at the center in the vertical direction on the rear surface 6 b of the right end of the rack 6. The groove 24 extends horizontally to the right end face of the rack 6. The rear surface 6b of the right end of the rack 6 is bifurcated up and down by the groove 24 so that the tooth portion 23 is directed rearward to both the upper portion of the groove 24 and the lower portion of the groove 24. It is formed to project. The upper and lower teeth 23 are formed in synchronization with each other. Although the number of teeth 23 (the number of teeth) is arbitrary, in the present embodiment, the number of teeth 23 is three in both the upper and lower sides. As shown in FIG. 3, the rack 6 is semicircular in cross section, and the front surface 6 a of the rack 6 which is a surface far from the main shaft 3 is a curved surface that is curved in the vertical direction. The front surface 2 a of the curved rack 6 slides on the wall surface of the storage chamber 20. When the rack 6 moves in the horizontal direction, the front surface 6 a of the rack 6 is guided by the wall surface of the storage chamber 20.

<Pinion 7>
The pinion 7 rotates integrally with the main shaft 3. The pinion 7 may be configured separately from the main shaft 3, but is integrally formed at the central portion of the main shaft 3 in the present embodiment. That is, the pinion 7 does not constitute a separate member from the main shaft 3 and constitutes one member with the main shaft 3. The pinion 7 is provided with a tooth portion 25 that meshes with the tooth portion 23 of the rack 6 on the outer peripheral surface. In the present embodiment, since the toothed portion 23 of the rack 6 is vertically separated and formed at two places, the toothed portion 25 of the pinion 7 is also provided at two places spaced apart vertically. The pinion 7 is provided with a tooth portion 25 only on a part of the entire circumference of the outer peripheral surface, and the other portion of the outer peripheral surface where the tooth portion 25 is not formed is a smooth curved surface. A portion of the outer peripheral surface of the pinion 7 where the tooth portion 25 is not formed is referred to as a toothless portion 26. The tip circle of the tooth 25 of the pinion 7 and the toothless portion 26 of the pinion 7 have the same diameter. In the present embodiment, the number of teeth 25 of the pinion 7 is three, which is the same as the number of teeth 23 of the rack 6. As shown in FIG. 1, when the door is closed, the teeth 25 of the pinion 7 are in mesh with the teeth 23 of the rack 6.

<Cam 8>
The cam 8 constitutes a stop device together with the engagement ball 9 and the stop spring 10. The cam 8 rotates integrally with the main shaft 3. The cam 8 is also integrally formed on the main shaft 3 in the same manner as the pinion 7 and constitutes one member together with the pinion 7. The cam 8 is located between the upper and lower teeth 25 of the pinion 7 and engages with the groove 24 of the front face 6 a of the rack 6. However, the cam 8 is not in contact with the rack 6 and is fitted in the groove 24 through a slight gap. At predetermined positions on the entire circumference of the outer peripheral surface of the cam 8, engagement recesses 27 and 28 with which the engagement ball 9 is engaged are formed. The engagement recesses 27 and 28 are formed in an arc shape having a radius corresponding to the curved surface of the engagement ball 9. The number of engagement recesses 27 and 28 is arbitrary, and may be one or more. In the present embodiment, the engaging recesses 27 and 28 are formed in two places along the circumferential direction, and the engaging recesses 27 and 28 with which the engaging ball 9 is engaged first when the door is opened are first The engagement recesses 27 and 28 in which the engagement ball 9 is engaged secondly are referred to as second engagement recesses 28. The stop device is for holding the door at a predetermined opening angle. In the present embodiment, since the cam 8 has the first engagement recess 27 and the second engagement recess 28, when the engagement ball 9 is engaged with the first engagement recess 27, The door can be stopped at two opening angles, one opening angle and a second opening angle when the engagement ball 9 engages the second engagement recess 28. The first opening angle is a relatively small opening angle, and the second opening angle is a relatively large opening angle.

<Casing>
A casing 16 is attached to the right end of the housing 2. The casing 16 is inserted into the insertion hole 33 of the housing 2 from the right side, the distal end side of the casing 16 is located inside the housing 2, and the proximal end side of the casing 16 is exposed to the outside from the right end face of the housing 2 There is. The tip of the casing 16 protrudes inward from the insertion hole 33. That is, the tip of the casing 16 protrudes into the storage chamber 20. The casing 16 has a cylindrical shape with both ends open, and the opening at the tip end of the casing 16 has a smaller diameter than the opening at the base end. Further, the opening on the tip end side of the casing 16 has a shape narrowed toward the tip end. At the proximal end of the casing 16, a flange portion 30 is provided to project outward. The flange portion 30 functions as an operation portion when screwing the casing 16 into the insertion hole 33 of the housing 2. For this reason, the flange portion 30 is not circular, and has a shape having a D-cut straight portion, and it is easy to rotate the casing 16 around its center line via the flange portion 30.

  The centerline of the casing 16 is along the horizontal direction. When viewed in the direction of the center line 3 a of the main shaft 3, that is, in a plan view or a bottom view as shown in FIG. 1, the center line 3 a of the main shaft 3 is located on the extension of the center line of the casing 16. The center line of the casing 16 coincides with the center line 10 a of the stop spring 10. The central line of the casing 16 is, as with the main shaft 3, at a position eccentric to the rear side, and although parallel to the central line 5a of the main spring 5, it is located rearward of that.

  The casing 16 is screwed into the insertion hole 33 of the housing 2. A female screw portion 31 is formed in the vicinity of the opening of the insertion hole 33, and a male screw portion 32 is formed on the outer peripheral surface on the base end side of the casing 16. It is screwed horizontally in the direction. The horizontal position of the casing 16 can be adjusted by adjusting the amount of screwing of the casing 16 into the insertion hole 33, and when the amount of screwing is increased, the casing 16 approaches the main shaft 3 to reduce the amount of screwing. And the casing 16 separate from the main shaft 3. The engagement ball 9, the stop spring 10 and the spring force adjustment member 11 are accommodated in the casing 16, and by moving the casing 16, the engagement ball 9, the stop spring 10 and the spring force adjustment member 11 together with the casing 16 Move in bulk.

<Engaging ball 9>
The engagement ball 9 is rotatably incorporated at the tip of the casing 16. The engagement ball 9 protrudes from the opening at the tip end of the casing 16 toward the main shaft 3 by a predetermined amount. The engagement ball 9 is urged toward the main shaft 3 by the stop spring 10, but the engagement edge of the engagement ball 9 abuts on the opening edge on the front end side of the casing 16 to engage by exceeding a predetermined projection amount. The joint ball 9 does not protrude from the opening on the front end side of the casing 16. On the other hand, when the engagement ball 9 is pushed to the right by the cam 8, it can enter the inside of the casing 16 so as to reduce the predetermined amount of protrusion. That is, the engagement ball 9 is movable along the center line of the casing 16 so as to increase or decrease the amount of protrusion from the casing 16 within a range not exceeding the predetermined amount of protrusion.

  The engagement ball 9 is an engagement member having an engagement protrusion which engages with the engagement recesses 27 and 28 of the cam 8. The engagement ball 9 is a sphere and is rotatable, and the whole functions as an engagement protrusion. The engagement ball 9 is, for example, a steel ball and is made of a material having excellent durability. The engagement ball 9 is located on the right side of the main shaft 3. As mentioned above, the main spring 5 is on the left side of the main shaft 3. Therefore, the engagement ball 9 is located on the side opposite to the main spring 5 in the horizontal direction centering on the main shaft 3. In a plan view or in a bottom view as shown in FIG. 1, the center of the engagement ball 9 and the center line 3a of the main shaft 3 are not mutually offset in the front-rear direction, and are located on the same line extending horizontally . In the state where the door as shown in FIG. 1 is closed, the engaging ball 9 is not in contact with the outer peripheral surface of the cam 8 and is opposed to the outer peripheral surface of the cam 8 through a slight gap. ing. The separation distance between the engagement ball 9 and the outer peripheral surface of the cam 8 is small, specifically 1 mm or less. As the door opens from the state of FIG. 1 to the predetermined opening angle, the engagement ball 9 starts to abut on the outer peripheral surface of the cam 8. The opening angle of the door when the engagement ball 9 starts to abut on the outer peripheral surface of the cam 8 is smaller than the first opening angle. Accordingly, in the section from the fully closed state of the door to the predetermined opening angle, the engaging ball 9 does not abut on the outer peripheral surface of the cam 8. When opening the door, the engagement ball 9 engages with the first engagement recess 27 after the engagement ball 9 starts to abut on the outer peripheral surface of the cam 8. The separation distance between the engagement ball 9 and the outer peripheral surface of the cam 8 in the fully closed state can be easily set by adjusting the horizontal position of the casing 16.

<Stop spring 10>
The stop spring 10 is located on the right side of the engagement ball 9. That is, the stop spring 10 is located on the opposite side of the main shaft 3 with the engagement ball 9 as the center. The stop spring 10 is a coil spring. The stop spring 10 is weaker and smaller in diameter than the main spring 5. The center line 10a of the stop spring 10 extends in the horizontal direction, and in a plan view or a bottom view shown in FIG. The center line 3a of the main shaft 3 is located. Therefore, the direction of the center line 10 a of the stop spring 10 is the radial direction of the main shaft 3 and the radial direction of the cam 8.

  The stop spring 10 pushes the engagement ball 9 toward the left side, ie, the main shaft 3 side, and always applies a pressing force to the engagement ball 9. A ball receiver 17 is disposed between the engagement ball 9 and the stop spring 10, and the stop spring 10 presses the engagement ball 9 via the ball receiver 17. The ball receiver 17 is preferably made of synthetic resin. The ball receiver 17 has a head portion 40 and a shaft portion 41. The shaft portion 41 enters the inside of the stop spring 10, and the stop spring 10 pushes the head portion 40 toward the left side. Further, the head portion 40 has a hemispherical concave surface 42 with which the engagement ball 9 can be engaged, and the concave surface 42 supports the engagement ball 9 so as to be rotatable.

<Spring force adjustment member 11>
The spring force adjustment member 11 is located on the right side of the stop spring 10. A female screw portion 50 is formed on the inner peripheral surface on the proximal end side of the casing 16, and the spring force adjusting member 11 is screwed into the female screw portion 50 from the proximal end side of the casing 16. When assembling, the engaging ball 9, the ball receiver 17, the stop spring 10, and the spring force adjusting member 11 are sequentially inserted into the casing 16 from the opening on the proximal end side. The end face on the base end side of the spring force adjustment member 11 is exposed from the opening on the base end side of the casing 16, and the end face on the base end side of the spring force adjustment member 11 can access the tip of the tool from the outside .

  The tip end surface of the spring force adjustment member 11 is in contact with the stop spring 10, and the stop spring 10 can be extended or contracted by adjusting the amount of screwing of the spring force adjustment member 11 into the casing 16 to adjust the spring force. it can. A shaft portion 11a is provided on the end face of the tip end side of the spring force adjustment member 11 so that the shaft portion 11a enters the inside of the stop spring 10. An O-ring 51 is attached to the outer peripheral surface on the proximal end side of the spring force adjustment member 11 to prevent the leakage of the hydraulic oil entering the inside of the casing 16. At the end face on the proximal end side of the spring force adjustment member 11, an engagement groove 52 capable of engaging the tip of the tool is formed. The engagement groove 52 has, for example, a negative or positive shape. The screwing amount of the spring force adjusting member 11 can be adjusted by rotating the spring force adjusting member 11 around the center line of the casing 16 with a tool. FIG. 1 shows a state in which the amount of screwing of the spring force adjustment member 11 is maximum and the spring force is set to the maximum state.

  Similarly, FIG. 5A shows a state in which the amount of screwing of the spring force adjustment member 11 is maximum and the spring force is maximum. 5A shows a state where the door is further opened from the state where the engagement ball 9 is engaged with the second engagement recess 28 of the cam 8 and the cam 8 is rotated clockwise in FIG. ing. The engagement ball 9 is in contact with the largest radius portion 29 of the outer peripheral surface of the cam 8 and is most pushed into the casing 16. Therefore, the stop spring 10 is compressed from the left and right by the ball receiver 17 and the spring force adjusting member 11, and the amount of compression is maximum. In FIG. 5B, the engaging ball 9 is in contact with the portion 29 having the largest radius of the outer peripheral surface of the cam 8 and is most pushed into the casing 16 as in FIG. 5A. The screwing amount of the spring force adjusting member 11 is minimized.

  The door closer main body 1 as described above is attached to, for example, a door and used. The state shown in FIGS. 1 and 2 is a state in which the door is fully closed, and as the door is opened from the fully closed state, the main shaft 3 is rotated clockwise in FIG. 1 accordingly. As the main shaft 3 rotates, the cam 8 and the pinion 7 also integrally rotate, and the rack 6 meshing with the pinion 7 moves to the right. By moving the rack 6 to the right, the piston 4 is also moved to the right integrally with it, and the main spring 5 is compressed.

  The engagement ball 9 starts to abut on the outer peripheral surface of the cam 8 before the first engagement recess 27. Thereafter, the engagement ball 9 rolls while abutting on the outer peripheral surface of the cam 8, and eventually the engagement ball 9 engages with the first engagement recess 27 as shown in FIG. 4A. When the engagement ball 9 engages with the first engagement recess 27, the door stops at the opening angle even if the door is released. The opening angle at this time is the first opening angle. Further, in a state in which the engagement ball 9 is engaged with the first engagement recess 27, the meshing between the teeth 23 of the rack 6 and the teeth 25 of the pinion 7 is completed, and the last teeth 23 of the rack 6 It abuts on the end of the toothless portion 26 on the outer peripheral surface of the pinion 7.

  When the door is opened beyond the first opening angle, the main shaft 3 further rotates clockwise from FIG. 4A, and the cam 8 and the pinion 7 also rotate integrally with the main shaft 3. Then, as shown in FIG. 4B, the engagement ball 9 is engaged with the second engagement recess 28 of the cam 8 to hold the door at the second opening angle. Thus, while the main shaft 3 rotates, the tooth portion 23 of the rack 6 does not mesh with the tooth portion 25 of the pinion 7 and is in contact with the toothless portion 26, so the pinion 7 rotates with the main shaft 3 However, the rack 6 does not move and remains at the position of FIG. 4 (a). Therefore, even if the door pivots from the first opening angle to the second opening angle, the main spring 5 is not compressed beyond the first opening angle, and compression at the first opening angle. It is maintained in the state. Since the closing force by the main spring 5 does not act on the door through the main shaft 3 in the section from the first opening angle to the second opening angle, the light force from the first opening angle to the second opening angle It can be opened. The door may not be opened to the second opening angle, but may be opened to the first opening angle.

  When closing the door stopped at the second opening angle, a force exceeding the holding force of the stop device is applied to the door to disengage the engagement ball 9 from the second engagement recess 28. The engagement ball 9 disengaged from the second engagement recess 28 engages with the first engagement recess 27. In the section from the second opening angle to the first opening angle, since the closing force by the main spring 5 is not applied, the door is turned in the closing direction to shift to the first opening angle. Thereafter, a force in a closing direction is applied to the door to disengage the engagement ball 9 from the first engagement recess 27. As soon as the engagement ball 9 is removed from the first engagement recess 27, the teeth 23 of the rack 6 begin to mesh with the teeth 25 of the pinion 7, the closing force of the main spring 5 causes the rack 6, pinion 7 and main shaft 3 to move. Acts on the door through and the door closes automatically.

  In addition, it is also possible to switch ON / OFF of the stop device. FIG. 1 shows the state in which the stop device operates in the ON state, but if the casing 16 is rotated and moved to the right from this state, the stop device can be in the state of OFF. As the screwing amount of the casing 16 into the housing 2 is reduced, the engagement ball 9 moves away from the cam 8 to the right, and the engagement ball 9 is on the outer peripheral surface of the cam 8 even if the door opens to a predetermined opening angle. The engagement ball 9 can be released to a position where it does not abut. In that state, the door can not be stopped in the open state and can be used without the stop function.

  The door closer provided with the door closer 1 having the above configuration incorporates the stop device in the door closer 1 so that the stop device can not be seen from the outside, and hence a good appearance can be obtained. Further, since the working oil is present around the engaging ball 9 and the cam 8 and has a wet configuration, the door can be held and released more smoothly than the dry configuration in which the working oil is not present. The noise is small, and the durability of the engagement ball 9 and the cam 8 is also high. Furthermore, in the section from the fully closed state of the door to the predetermined opening angle, the engaging ball 9 is not in contact with the outer peripheral surface of the cam 8 and is in a separated state, so that the engaging ball is engaged While the durability of 9 is enhanced, in the section, the engagement ball 9 is silent without the noise of rolling on the outer peripheral surface of the cam 8.

  Further, by adjusting the spring force of the stop spring 10 with the spring force adjusting member 11, the holding force for holding the door in the open state can be easily adjusted. When the amount of screwing of the spring force adjusting member 11 is increased to increase the spring force of the stop spring 10, the pressing force for pressing the engagement ball 9 to the cam 8 side is increased, and the holding force of the door is increased. Conversely, when the amount of screwing of the spring force adjustment member 11 is reduced to reduce the spring force of the stop spring 10, the pressing force for pressing the engagement ball 9 to the cam 8 side decreases and the holding force of the door decreases. By adjusting the screwing amount of the spring force adjusting member 11 in this manner, the holding force of the door can be easily adjusted. Moreover, since the screwing amount of the spring force adjusting member 11 is adjusted, fine adjustment of the holding force is easy, and any holding force can be easily set.

  Further, even if the holding force is increased or decreased, the amount of engagement between the engagement ball 9 and the first engagement recess 27 and the second engagement recess 28 is constant. Therefore, even if the holding force is increased or decreased, the engagement ball 9 reliably engages with the first engagement recess 27 and the second engagement recess 28 to hold the door in a stable state. Do. In addition, since the engagement ball 9 engages with the first engagement recess 27 and the second engagement recess 28 in a constant engagement state, the wear of the engagement ball 9 and the cam 8 is also small, and the durability is also improved. Are better.

  Further, the engagement ball 9, the stop spring 10 and the spring force adjustment member 11 are disposed 180 ° opposite to the main spring 5 with respect to the main shaft 3, so the horizontally long shape of the door closer 1 is maintained. However, the stop device and the holding force adjusting mechanism for adjusting the holding force can be easily installed in the door closer 1. Furthermore, since the center line 3a of the main shaft 3 is offset to the rear side with respect to the center line 5a of the main spring 5, the teeth 23 of the rack 6 can be easily arranged on the front side of the main shaft 3 It is possible to make the dimension of the door closer body 1 in the front-rear direction compact. In particular, when the door is opened to the first opening angle or the second opening angle as shown in FIG. 4, the right end of the rack 6 is overlapped on the front side of the leading end of the casing 16 A groove 24 is formed along the horizontal direction in the rear surface 6 b of the right end of the rack 6, and the groove 24 extends to the end face of the rack 6 and is open, so interference between the casing 16 and the rack 6 Can be avoided, and the casing 16 can be disposed up to the vicinity of the main shaft 3. In addition, since the center line 3a of the main shaft 3 is located on the extension of the center line 10a of the stop spring 10, the engaging ball 9 is pressed against the cam 8 in the radial direction, and the holding state of the door is stabilized.

  In addition, since the engaging ball 9, the stop spring 10 and the spring force adjusting member 11 are accommodated in the casing 16 separate from the housing 2, the housing 2 includes parts such as the main spring 5 one by one from the left side. The engaging ball 9, the stop spring 10 and the spring force adjusting member 11 can be assembled to the casing 16 separately from the assembling operation. Then, by assembling the unitized casing 16 to the housing 2 from the right side, the assembling operation can be made more efficient. In addition, even when it is necessary to inspect or replace the engagement ball 9, the casing 16 can be easily inspected and replaced by removing it from the housing 2.

  In addition, by moving the casing 16 relative to the housing 2, the switching operation of ON / OFF of the stop device is also possible. Moreover, by moving the unitized casing 16 relative to the housing 2, the engaging ball 9 is brought close to the cam 8 and the stop device is turned on or the engaging ball 9 is moved away from the cam 8. Since the device can be turned off, the switching operation is easy and reliable.

  Note that the housing 2 may be provided with a restricting portion that restricts the movement range of the casing 16 within a predetermined range. That is, it is preferable to restrict the moving range of the casing 16 so that the casing 16 does not approach the main shaft 3 excessively than in the ON state, and the casing 16 is not separated from the main shaft 3 more than necessary. The configuration of the restricting portion is optional, and may be a separate member from the housing 2, but may be integrally formed on the housing 2 as shown in FIG. 6, for example.

  In the configuration shown in FIG. 6, the configurations of the housing 2 and the casing 16 are slightly different from the configuration of FIG. First, on the outer peripheral surface of the casing 16, the seal portion 60 located on the base end side of the male screw portion 32 and located on the base end side of the seal portion 60 larger in diameter than the male screw portion 32 An annular restricting groove 61 having a diameter smaller than 60 is formed, and the flange portion 30 is located on the base end side of the restricting groove 61. One wall surface of the restriction groove 61 is an end surface of the seal portion 60, and the other wall surface of the restriction groove 61 is an end surface of the flange portion 30. The flange portion 30 has a diameter larger than that of the seal portion 60. Further, an O-ring 62 is attached to the seal portion 60. Also in the configuration shown in FIG. 1, the O-ring 62 may be attached to the outer peripheral surface of the casing 16.

  On the other hand, an insertion hole 33 for inserting the casing 16 into the housing 2 is opened at the right end face of the housing 2, but an annular ridge 63 for caulking is provided at the opening edge of the insertion hole 33. ing. After the casing 16 is inserted into the housing 2, the distal end portion of the annular ridge 63 is crimped and the annular regulation ridge 64 as a regulation part is protruded toward the inside to make the regulation ridge 64 a regulation groove of the casing 16. Located at 61. Since the width of the restricting groove 61 is larger than the width of the restricting protrusion 64 and has a predetermined margin, the casing 16 can be moved laterally with respect to the housing 2 within the range of the margin. The casing 16 can not move beyond the range of the allowance.

  As shown in FIG. 6A, the casing 16 is screwed into the housing 2 until the flange portion 30 of the casing 16 abuts on the control protrusion 64, and the casing 16 is closest to the main shaft 3 as shown in FIG. When the casing 16 is in this state, the stop device is in the ON state. In addition, since the flange portion 30 of the casing 16 abuts on the control protrusion 64, the casing 16 can not be screwed into the housing 2 any more. Therefore, the casing 16 may be screwed in until the flange portion 30 of the casing 16 abuts on the control projection 64, and the stop device can be easily turned ON.

  Conversely, when the amount of screwing is reduced so as to pull out the casing 16 from the housing 2, the control protrusion 64 abuts on the seal portion 60 of the casing 16 as shown in FIG. 6 (b). In this state, the stop device is in the OFF state, and the engagement ball 9 does not contact any part of the outer peripheral surface of the cam 8. That is, the engaging ball 9 does not abut on the portion 29 of the outer peripheral surface of the cam 8 which has the largest radius. In addition, since the seal portion 60 of the casing 16 abuts on the control protrusion 64, the casing 16 can not be pulled out of the housing 2 any more. Therefore, the casing 16 can be pulled out until the seal portion 60 of the casing 16 abuts on the control projection 64, and the stop device can be easily turned OFF. Thus, the stop device can be easily switched ON / OFF by bringing the control ridges 64 into contact with both wall surfaces of the control groove 61.

  In the above embodiment, although the case where the engagement member is the rotatable engagement ball 9 has been described, the engagement member may be a roller. In addition, the engaging member may be configured not to rotate, that is, may be fixed and fixed, or may be configured such that a part of the engaging member is an engaging convex portion. The engagement convex portion may be hemispherical or may have a cylindrical curved surface which is curved around an axis in the vertical direction.

DESCRIPTION OF SYMBOLS 1 door closer body 2 housing 2a front surface 2b rear surface 3 spindle 3a centerline 4 piston 4a centerline 5 main spring 5a centerline 6 rack 6a front 6b rear surface 7 pinion 8 cam 9 engagement ball (engagement convex portion, engagement member)
DESCRIPTION OF SYMBOLS 10 Stop spring 10a Center line 11 Spring force adjustment member 11a Shaft part 12 Mounting plate 13 End plug 14 Bushing 15 Bushing 16 Casing 17 Ball receptacle 20 Storage room 21 Check valve 22 Pin 23 Tooth part (rack)
24 groove 25 teeth (pinion)
26 toothless portion 27 first engagement recess 28 second engagement recess 29 maximum radius portion 30 flange portion 31 internal thread portion (housing)
32 Male thread (casing)
33 insertion hole 40 head portion 41 shaft portion 42 concave surface 50 female screw portion (casing)
51 O-ring (spring force adjustment member)
52 Engaging groove 60 Sealing part 61 Regulating groove 62 O-ring (seal part)
63 Annular projection 64 Regulation projection

Claims (4)

A door closer with an interior stop device, comprising a door closer body with an interior stop device,
The door closer body includes a main shaft that rotates with the opening and closing of the door, a main spring for generating a closing force, and a housing .
The stop device rotates integrally with the main shaft and has a cam having an engagement recess on the outer peripheral surface, an engagement member having an engagement projection engageable with the engagement recess of the cam, and the engagement member And a spring force adjusting member for adjusting the spring force of the stop spring, and the engaging member, the stop spring and the spring force adjusting member are the main spring with the main shaft as the center. It is located on the opposite side,
An end face of a spring force adjusting member is exposed to the outside from a housing, and the spring force can be adjusted by operating the spring force adjusting member from the outside of the housing . A door closer with an interior stop device, comprising a door closer body with an interior stop device,
The door closer body has a main shaft that rotates with the opening and closing of the door, and a main spring for generating a closing force.
The stop device rotates integrally with the main shaft and has a cam having an engagement recess on the outer peripheral surface, an engagement member having an engagement projection engageable with the engagement recess of the cam, and the engagement member And a spring force adjusting member for adjusting the spring force of the stop spring.
The main spring and the stop spring are both coil springs,
When viewed in the direction of the center line of the main axis, the center line of the main axis is offset in the front-back direction with respect to the center line of the main spring, and the center line of the main axis is located on the extension of the center line of the stop spring. A door closer with an interior stop device characterized in that A door closer with an interior stop device, comprising a door closer body with an interior stop device,
The door closer body has a main shaft that rotates with the opening and closing of the door, and a main spring for generating a closing force.
The stop device rotates integrally with the main shaft and has a cam having an engagement recess on the outer peripheral surface, an engagement member having an engagement projection engageable with the engagement recess of the cam, and the engagement member And a spring force adjusting member for adjusting the spring force of the stop spring.
The door closer body has a housing,
A door closer with an interior stop device characterized in that the engaging member, the stop spring and the spring force adjusting member are incorporated in a casing separate from the housing and attached to the housing via the casing. .   4. A door closer with an interior stop device according to claim 3, wherein the casing is movably mounted to the housing, and the stop device can be switched ON / OFF by moving the casing relative to the housing.

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