CN100526588C - Door closing device of sliding door - Google Patents

Abstract

The invention relates to a closing device of a sliding door, which aims to forcibly pull the sliding door to the closing side end portion on the sliding doors of various received and accepted furniture such as buffets, book cabinets and display cabinets and the like, especially when the sliding door is close to the closing side end portion, and reduce the speed of the sliding door into an appropriate extent in order to favorably close the door when the door is about to close. A Y-shaped component (2) which can freely rotate is installed on a sliding component (1) which can slide in appropriate region of a casing (A) which is installed on the end portion of a guide rail (17), and the sliding component (1) is trend to move to the closing end under the effect of an elastic component (3). A guide running body (B) which can run along the guide rail (17) under the effect of resistance (T) which is generated by a buffer component (4) which can reduce the elastic force of the elastic component (3) starts to move to the opening direction in the sliding region of the sliding component (1) from the state of being locked on the Y-shaped component (2).

Description

Door closing device for sliding doors

technical field

The invention relates to a door closing device for a sliding door. For sliding doors of various storage furniture such as sideboards, bookcases, and display cabinets, especially when the sliding door is close to the end of the closing side of the sliding door, the sliding door can be forced to Close the side end of the door, and when it is about to close, the speed of the sliding door can be reduced to an appropriate level and closed well.

Background technique

Hitherto, there is a sliding door device as described in documents such as Japanese Patent Application Laid-Open No. 2002-138739. Sliding doors with glass are often installed on various storage furniture such as sideboards, bookcases, and display cabinets. For storage furniture with a narrow front width, this kind of sliding door only needs to use a sliding door with a very simple structure with guide rails formed on the upper and lower sides of the front of the cabinet, and the upper and lower ends of the glass plates inserted in the guide rails. But for high-end furniture, the opening and closing of the sliding door is required to have a heavy feeling and be able to open and close gently. However, the sliding doors of large-scale furniture are also relatively large, and the weight of the sliding doors themselves is also very heavy. Therefore, if the sliding doors of the above-mentioned conventional structure are adopted, the opening and closing of the sliding doors must have a heavy feeling and be able to be opened with high quality. Closing is difficult.

In addition, due to the heavy weight of such a large sliding door, once the sliding door starts to move, it is possible to hit the closing end with a large impact force under the action of inertia. This condition reduces the quality of the furniture and is therefore not commensurate with high-end furniture. And to prevent the sliding door from producing the above-mentioned impact on the closing side end when closing the door, the final result is to reduce the inertia of the sliding door as much as possible when closing the door. In doing so, it is easy to cause the sliding door to not be fully closed.

This is also a reason for the lower quality of furniture. In addition, some sliding doors are equipped with a door closing device with a buffer function when the sliding door is closed, but most of these devices are bulky, so the door closing device is exposed outside the sliding door device, which not only takes up too much space but also affects the appearance.

Contents of the invention

The purpose of the present invention is, especially when the sliding door is close to the closing side end of the sliding door, the sliding door can be forcibly pulled towards the closing side end, and the speed of the sliding door can be reduced to an appropriate level when it is about to close. And good closing can also realize the miniaturization of the door closing device, by being directly assembled on the guide rail of the sliding door, the assembly space of the door closing device on the sliding door device can be very small.

In order to achieve the above task, the inventor has repeatedly concentrated on research and designed the present invention as such a door closing device, that is, a freely rotatable sliding part is installed on a sliding part that can slide in an appropriate area in the housing installed at the end of the guide rail. The fork-shaped part, the sliding part tends to move towards the door closing end under the action of the elastic part, and under the action of the resistance produced by the buffer part that reduces the elastic force of the elastic part, the guide walking body that walks along the guide rail moves from The state of being locked on the fork-shaped part begins to move in the sliding area of the sliding part in the direction of closing the door. The sliding part is formed with a rack part, and the buffer part has a And for the gear portion that produces resistance to the movement of the sliding member in the direction of the door closing end driven by the elastic member, a sliding restriction protrusion is formed on the sliding member, and a sliding restriction portion is formed on the housing, so The sliding restriction protrusion is inserted into the sliding restriction part to restrict the movement of the sliding part; through this design, the sliding door can be forcibly pulled toward the end on the closing side, and the speed of the sliding door can be reduced to an appropriate level when it is about to close. It can be closed well to a certain extent, and the miniaturization of the door closing device can also be realized. By directly assembling on the guide rail of the sliding door, the assembly space of the door closing device on the sliding door device can be very small, so as to achieve the above tasks.

In particular, by installing the above-mentioned closing device for a sliding door, the sliding door can be gently closed. This is because both the sliding part and the fork are connected by a pivot, so that the fork can swing freely. In addition, the movement of the sliding member in the door closing direction in the housing depends on the elastic force of the elastic member, and since there is a buffer member that can reduce the elastic force, the guide body can be subtracted from the elastic force of the elastic member. The force of the difference in the resistance of the buffer member makes the sliding door move in the door closing direction, and closes very gently, stably and well.

In addition, the present invention is a door closing device for a sliding door, which includes: a sliding part, a fork part, a rotating base connected to the sliding part through a pivot, a locked piece, an abutted piece, and An engaging portion protruding upward through the rotation of the rotating root; an elastic component that applies an elastic force to the sliding component toward the door closing end; a buffer component that generates resistance to reduce the elastic force of the elastic component; The housing installed on the guide rail forms the main guide part that installs the sliding part, the fork part, the elastic part and the buffer part, and guides the sliding part along the horizontal direction, at the door opening end close to the main guide part The position forms the engaged surface; the guide part is set on the guide traveling body that runs along the guide rail, and the front end of the rod extending along the moving direction is formed to be locked on the locked piece and contacted with the locked piece. The locking part where the contact piece is in contact; the fork-shaped part only swings when the sliding part is at the terminal position of the door-opening end, and the engaging part is freely engaged with the engaged surface; therefore, when the sliding door approaches When near the door-closing side end of the sliding door, the sliding door can be forcibly pulled toward the door-closing side end, and, when this is about to be closed, the speed of the sliding door is reduced to an appropriate level to close well. The miniaturization of the door closing device can also be realized, and the assembly space of the door closing device on the sliding door device is very small by being directly assembled on the guide rail of the sliding door.

Next, the above-mentioned effects will be described in detail. The fork-shaped member formed with the locked piece and the abutted piece is free to swing relative to the sliding member, and further protrudes upward along with the rotation of the rotation base. The fork-shaped part only swings when the sliding part is at the terminal position of the door-opening end, and the engaging part is freely engaged with the engaged surface. Therefore, when the door is closed, the fork can be stably temporarily stopped at the door opening end in the initial stage. That is, when the fork swings, there is little swinging in the right and left direction, so failures rarely occur.

In addition, when the locking part of the guide walking body is to be locked on the fork-shaped part, it is smoothly locked, and although the sliding part and the fork-shaped part move to the door closing direction under the action of the elastic part, the The resistance of the cushioning part plays the role of reducing the elastic force of the elastic part. Therefore, the sliding part and the fork part that make the guide walking body move can make it move at an appropriate slow speed in the housing. In addition, in the present invention, the sliding part and the fork part in the housing move along the length direction of the housing, and the moving direction is the same as the moving direction of the guiding body in the housing. Therefore, the housing in the present invention can be installed on the end of the guide running body in the length direction, and thus can be generally integrated with the guide rail, so that the device of the present invention is easy to install and saves installation space.

In addition, the present invention is such a sliding door closing device, that is, in the above configuration, the engaging portion and the engaged surface are arc-shaped convex portions and arc-shaped concave surfaces with the pivot connection portion as the center of rotation. Therefore, when the fork-shaped member moves from the main guide portion to the engaged surface and the engaging portion engages with the engaged surface, the fork-shaped member can rotate extremely smoothly.

In addition, the present invention is such a sliding door closing device, that is, in the above-mentioned configuration, the rack portion is formed on the sliding member, and the buffer member has Since the gear portion generates resistance to movement in the direction of the door-closing end driven by the component, the sliding door can be decelerated extremely simply and well.

In addition, the present invention is a sliding door closing device in which, in the above configuration, the sliding member operating piece and the fork member operating piece protruding outward from the housing are respectively formed on the sliding member and the fork member. Therefore, even if only the fork enters the housing when the locking portion of the guide traveling body is not caught on the fork due to malfunction, for example, the sliding member operating piece and the fork operating piece can Make the fork protrude out of the housing.

Description of drawings

Fig. 1 A is the front view of the main part of the partial section under the state that the door closing device of the present invention is installed on the sliding door; An exploded perspective view of components, Fig. 1D is a perspective view of a cushioning component.

Fig. 2A is a side view of the main part of the door closing device viewed from the first case part side, and Fig. 2B is a side view of the main part of the door closing device seen from the second case part side.

Fig. 3A is a sectional view taken along the line X ₁ -X ₁ in Fig. 2A, and Fig. 3B is a sectional view taken along the line X ₂ -X ₂ in Fig. 2A.

Fig. 4A is a side view of the sliding member and the fork, and Fig. 4B is a perspective view of the sliding member and the fork.

Fig. 5A is an enlarged side view of the sliding member and the fork in a tilted state, and Fig. 5B is an enlarged side view of the sliding member and the fork.

Fig. 6 is a side view of the first case part.

Fig. 7A is a schematic view of the working principle when the fork is located on the main guide, and Fig. 7B is a schematic view of the working when the fork is located on the engaged surface.

FIG. 8A is an enlarged working principle diagram of a state where the fork-shaped member is located at the main guide portion, and FIG. 8B is an enlarged working principle diagram of a state where the fork-shaped member is located on the engaged surface.

Fig. 9A is a perspective view of a guiding body, and Fig. 9B is a longitudinal sectional view of a sliding door device equipped with a door closing device of the present invention.

Fig. 10A is a schematic diagram of the working principle when the locking part of the guiding body is close to the fork-shaped part of the housing, and Fig. 10B is the abutment between the locking part of the guiding walking body and the abutted piece of the fork-shaped part of the housing Fig. 10C is a working principle diagram in the state where the locking part of the guide traveling body is locked on the fork-shaped part of the housing.

Fig. 11A is a working principle diagram when the locking part of the guiding body is locked on the fork-shaped part of the housing to release the temporary stop state of the fork-shaped part, and Fig. 11B is a working principle diagram in the state where the door is closed.

Fig. 12A is a working principle diagram when the locking part of the guide walking body is stuck on the fork-shaped part in the housing when the door is opened, and Fig. 12B is the state where the sliding door moves to the door-opening direction so that the fork-shaped part moves to the door-opening end Working principle diagram, FIG. 12C is a working principle diagram when the locking part of the guiding walking body is disengaged from the fork-shaped part of the housing, so that the fork-shaped part is in a temporary stop state.

13 is an enlarged view of a state where both the rack portion of the sliding member and the gear portion of the buffer member are engaged.

Fig. 14 is a schematic working principle diagram showing the action of the sliding door in the present invention.

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The present invention mainly comprises: the door closing device constituent part that is fixed on one side of guide rail, fork-shaped part 2, elastic part 3, cushioning part 4, casing A etc. Walking body B constitutes. First, as shown in FIG. 1C , FIG. 4A , and FIG. 4B , the sliding member 1 has a rack portion 1b formed in the longitudinal direction of a sliding main body portion 1a formed in an approximately square shaft shape. The rack portion 1b is formed of a plurality of teeth, and is a portion that meshes with a damper gear of the buffer member 4 described later.

As shown in FIG. 1C, a pivot connection portion 1c is formed at one end in the longitudinal direction of the sliding body portion 1a. A connecting shaft piece 1c ₁ is formed on the pivotal connection portion 1c, and as shown in FIG. 1B , a pivotal connection is realized between the connecting shaft piece 1c ₁ and the fork-shaped component 2 described later. In addition, a guided protruding piece 1d is formed in the vicinity of the pivot connection portion 1c on the end surface in the longitudinal direction of the slide body portion 1a. As shown in FIG. 1C , the guided protruding piece 1 d is a portion that protrudes in a horizontal direction approximately perpendicular to the longitudinal direction of the slide body portion 1 a , and has a flat upper surface.

The guided protruding piece 1d is a portion that slides along the main guide portion 6 of the casing A described later. In addition, an elastic member connecting portion 1e for fixing an end portion of an elastic member 3 to be described later is formed at a lower portion of the guided protrusion piece 1d. In addition, a slide member operating piece 1f protruding downward from the guided protrusion piece 1d is also formed. On the slide main body portion 1a, there is formed a slide regulating protrusion 1g that engages with a slide regulating portion formed on the casing A described later. The slide restricting projection 1 g is formed at an end near the door closing side in the longitudinal direction of the sliding member 1 , and protrudes in a direction perpendicular to the longitudinal direction of the sliding member 1 .

In addition, sometimes it is also designed to form a protruding portion 1h protruding upward at the end of the door opening side of the sliding member 1. When the front end of the protruding portion 1h abuts against the fork-shaped member 2 described later, it acts as a support for the fork-shaped member 2. The rotation range is limited. Here, the so-called door closing end and door opening end will be described. The door-closing end points to the direction in which the sliding door 18 moves when it is closed, which is the direction from left to right in FIG. 1A . The door-opening end points in a right-to-left direction in FIG. 1A . In addition, in the housing A, the right side in FIG. 1B is the door closing end, and the left side is the door opening end.

Next, the fork member 2 is composed of a turning base 2a, a fork 2b, and an engaging part 2c protruding upward as the turning base 2a turns. The fork portion 2b is composed of a locked piece 2b ₁ and a contacted piece 2b ₂ , and the locked piece 2b ₁ and the contacted piece 2b ₂ are substantially parallel to each other. As shown in FIGS. 5A and 5B , the locked piece 2b ₁ is formed to be lower than the contacted piece 2b ₂ in the height direction.

In addition, between the locked piece _2b1 and the contacted piece _2b2 is a recess _2b3 having an approximately U-shape, and a locking part 15b of the guide traveling body B described later can be inserted into the recess _2b3 . On the rotating base 2a, there is formed a pivot hole 2a 1 through which the connecting shaft piece 1c 1 formed on the pivotal connecting portion 1c of the sliding member ₁ can be inserted, and the connecting shaft piece _{1c 1 is} inserted into the pivot In the shaft hole _2a1 , the sliding part 1 and the fork part 2 are connected so that the fork part 2 can freely rotate up and down relative to the sliding part 1 (see Fig. 1, Fig. 4A, Fig. 5, etc.). The engaging portion 2c is a portion formed in an arc shape with the pivot hole 2a ₁ of the rotating root portion 2a as the center of a circle. Specifically, the engaging portion 2c is a portion formed as the outer peripheral surface of the turning base portion 2a. The engaging portion 2 c is a portion capable of approaching or contacting an engaged surface 7 formed in the casing A described later by turning in an arcuate shape. In addition, when the connecting shaft piece 1c1 of the pivotal connecting portion 1c between the fork member 2 and the sliding member 1 is rotated as described above _through the pivot hole _2a1 , the center of rotation is the center of the engaging portion 2c. The center of the arc.

In addition, it is sometimes designed to form a guide protrusion 2d on the fork portion 2b of the fork member 2. As shown in FIG. The guide protrusion 2d is inserted into an auxiliary guide portion 12 formed on the housing A described later, so that the fork 2 can move well along the length direction of the housing A, and the fork 2 can also be well and The part that performs the turning accurately.

In addition, as shown in FIG. 1C , FIG. 4A , etc., a fork-shaped member operating piece 2 e formed downward is formed on the turning base 2 a. When the fork 2 enters the housing A due to a malfunction of the fork operating piece 2e, it can be forcibly moved out of the housing A by the fork operating piece 2e. In addition, the fork-shaped member operating piece 2e protrudes out of the housing A together with the sliding member operating piece 1f, and can be operated from the outside of the housing A to forcibly move the sliding member 1 and the fork-shaped member 2 (see FIG. 1A). In addition, a locking protruding piece 2f perpendicular to the width direction of the fork portion 2b is formed on the top of the pivot base portion 2a. When the fork member 2 moves together with the slide member 1 along the main guide part 6 described later, the locking protruding piece 2 f moves while abutting against the main guide part 6 .

Next, the case A is divided into two parts, and is composed of a first case part _A1 and a second case part _A2 . FIG. 6 is a view viewed from the inside of the first housing portion _A1 . A main guide portion 6 is formed inside the first body 5 of the first case portion _A1 . The main guide portion 6 is a portion formed linearly in the longitudinal direction of the first case portion A ₁ , and its lower surface is formed into a plane. Specifically, the shape of the main guide portion 6 is a shape protruding inward from the surface of the first body 5 .

In addition, the main guide portion 6 is formed in an area of about half of the door-opening end side in the length direction of the first body 5 . As mentioned above, the lower surface of the main guide portion 6 is formed in a flat surface, and contacts the upper end surface of the guided protrusion piece 1d of the slide member 1, and the locking protrusion piece 2f of the fork member 2 also contact with the main guide 6. An engaged surface 7 is formed at an end portion in the door opening direction of the main guide portion 6 . The engaged surface 7 is formed in an arc shape as shown in FIGS. 6 and 8 . Specifically, the fork-shaped component 2 is an outwardly convex arc surface, that is, an arc-shaped convex portion, and the engaged surface 7 is an inwardly concave arc-shaped surface, that is, an arc-shaped concave portion. The engaging portion 2 c and the engaged surface 7 have substantially the same curvature, and the engaging portion 2 c can rotate smoothly along the engaged surface 7 .

In addition, when the fork-shaped part 2 moves to the engaged surface 7 along the main guide part 6, the engaging part 2c will slide along the engaged surface 7 to make the fork-shaped part 2 swing. When the engaging portion 2 c of the fork-shaped member 2 is engaged with the engaged surface 7 , the fork-shaped member 2 is temporarily stopped at the engaged surface 7 against the elastic force of the elastic member 3 . The temporarily stopped state means to maintain a stopped state in which it does not operate when it is subjected to some vibration or the like and can move when the locking portion 15b of the guide traveling body B abuts against it.

At this time, the fork 2 is in an inclined state in which the upper end of the engaged piece 2b ₁ is lower than the upper end of the contacted piece 2b ₂ . In this inclined state, the locking portion 15b of the guide traveling body B is in a state where it can freely enter and exit between the locked piece _2b1 and the contacted piece _2b2 . In addition, a cushioning member mounting portion 8 for mounting the cushioning member 4 is formed in the first case portion A ₁ , and the cushioning member 4 is mounted in the housing A through the cushioning member mounting portion 8 . The guided protrusion piece 1 d of the slide member 1 abuts against the lower portion of the main guide portion 6 . The condition of the elastic force F of the elastic member 3 is greater than the resistance T produced by the buffer member 4, but the difference between the elastic force F and the resistance T should be properly set.

Next, the second case portion _A2 will be described. FIG. 1B is a view of the inside of the second case part _A2 , in which the slide member 1, the fork member 2, the elastic member 3, and the buffer member 4 are attached. FIG. 2B is a diagram of the second case portion _A2 viewed from the outside. Fig. 2A is a combined drawing of the second case part _A2 and the first case part _A1 , and is a view viewed from the side of the first case part _A1 .

The second body 10 is formed with a slide restricting portion 11 and an auxiliary guide portion 12 . The slide restricting portion 11 has a linear shape, into which the slide restricting protrusion 1g of the slide member 1 can be inserted, and restricts the movement range of the slide member 1 inside the housing A. As shown in FIG. That is, it functions to prevent the sliding member 1 and the fork 2 from falling out of the housing A while allowing the sliding member 1 to move appropriately within the housing A. The appropriate movement of the sliding part 1 refers to movement within such a range, that is, the fork-shaped part 2 that is guided to the locking part 15b of the traveling body B and pulled out in the direction of opening the door can be positioned at the engaged surface 7. Temporary stop: The slide restricting portion 11 is formed in a slit shape and has a groove width that allows the slide restricting protrusion 1g of the slide member 1 to move smoothly.

Next, when the guide protrusion 2d of the fork-shaped member 2 is inserted, the auxiliary guide part 12 can move and swing the fork-shaped member 2 in the longitudinal direction of the housing A in a stable state. Guided parts. The auxiliary guide portion 12 is composed of a linear slide guide portion 12a formed in a linear slit shape, and a swing guide portion 12b when the fork 2 swings. The linear sliding guide portion 12a plays a role of supporting the moving fork member 2 when the fork member 2 moves along the length direction in the casing A together with the sliding member 1 . And the rotation guide portion 12b enables the fork 2 to move stably when swinging.

The role of the auxiliary guide portion 12 is to make the sliding member 1 and the fork member 2 move more reliably by means of the main guide portion 6 and the engaged surface 7 of the first housing portion _A1 . Therefore, this auxiliary guide part 12 may not be provided. In addition, only the auxiliary guide part 12 may be provided without the main guide part 6 and the engaged surface 7, but in this case, other guide parts necessary for the slide member 1 to slide must be provided.

On the second case portion _A2 , an attachment protruding portion 13 for attaching to an end portion of a guide rail 17 to be described later is formed. The attachment protruding portion 13 can stably hold the case A on the guide rail 17 after being inserted in the longitudinal direction from the end portion of the guide rail 17 in the longitudinal direction. In addition, if the swing guide portion 12b of the auxiliary guide portion 12 is formed on the attachment protrusion 13, the fork member 2 can be stably rocked in a state where a part protrudes from the housing A. As shown in FIG. At the lower part of the second case part _A2 , where it engages with the first case part _A1 , there is formed a bar-shaped part that can protrude from the sliding member operating piece 1f and the fork-shaped member operating piece 2e. The cut-out portion 10a to the outside of the case A is a slit for operation.

Next, the elastic member 3 is composed of an elastic part 3a and connecting parts 3b and 3b formed at both ends in the longitudinal direction of the elastic part 3a, and one connecting part 3b is connected to the elastic member connecting part of the second housing part _A2. 14, the other connecting portion 3b is connected to the elastic member connecting portion 1e of the sliding member 1. The elastic portion 3a is a coil spring. A spring housing portion 25 is formed in the second housing portion _A2 , and the elastic portion 3a is accommodated therein freely and telescopically, and as shown in FIG. .

Secondly, the function of the buffer component 4 is to reduce the elastic force F of the elastic component 3 . Specifically, as shown in FIG. 1D, the gear part 4a is installed in a buffer container 4b on which flanges 4c, 4c are formed. The buffer container 4b is attached to the first case part _A1 via the flanges 4c, 4c. There is a mechanism of generating resistance T to the rotation of the gear part 4a in the buffer container 4b. For example, there are high-viscosity materials such as lubricating grease in the buffer container 4b. The shaft of the gear part 4a is equipped with a stirring special piece, and the transmission is passed through the gear part 4a. The external force produces resistance T.

As shown in Fig. 1B, Fig. 13, etc., the gear part 4a of the buffer member 4 is engaged with the rack part 1b of the sliding part 1, so as to generate resistance T to the elastic force F that drives the sliding part 1 to move to the door closing end, so as to The door closing force P, which is the difference between the elastic force F and the resistance T, drives the sliding part 1 and the fork part 2 to move towards the door closing end. That is, the guide traveling body B supporting the sliding door 18 moves under the drive of the force of F-T=P, and as shown in FIG. The initial velocity Vn of the sliding door 18 can be reduced to a low level Vm by keeping the door closing force P acting until the door is completely closed. As shown in FIG. 1D, the buffer member 4 is of the type in which the resistance T is generated by the gear portion 4a, but it may also be designed as an oil cylinder type.

Next, the guide member 15 is installed on the guide traveling body B, and is composed of a rod portion 15a protruding in the moving direction of the guide traveling body B, and a locking portion 15b formed at the front end of the rod portion 15a. The portion 15b is formed to protrude in a hook shape in the horizontal direction with respect to the longitudinal direction of the rod portion 15a. And, when the door is closed, it abuts against the contacted piece 2b 2 of the fork member 2 temporarily stopped on the engaged surface 7, so that the fork member ₂ moves from the engaged surface 7 to the main guide portion. 6, at the same time, the locking portion 15b enters between the locked piece 2b ₁ and the abutted piece 2b ₂ to be locked on the fork-shaped member 2.

The guide member 15 is mounted on the running part 16 as a part connected to the guide running body B, specifically, as a main part of the guide running body B. As shown in FIG. The function of the guide walking body B is to make the sliding door 18 move along the guide rail 17 as shown in FIG. 9 . The guide rails 17 include a guide rail above the sliding door 18 and a guide rail below the sliding door 18 . Regardless of the guide rail 17, one or a plurality of guide rail portions 17a, 17a are formed. All the guide rail parts 17a, 17a of these guide rails 17 have a guide opening _17A1 formed below, and guide rail parts _{17a2 , 17a2} are formed on one side or both sides of the guide opening _17A1 .

The part of the guide running body B corresponding to the upper guide rail 17 is a suspended roller structure, and the running part 16 is composed of a running body part 16a and rollers 16b, 16b. The running body part 16a has a support shaft 16c for adjusting the position of the sliding door 18 in the vertical direction, and a connecting member 19 for connecting the sliding door 18 is attached to the lower part of the support shaft 16c. The connection between the guide walking body B and the sliding door 18 is realized by a connecting part 19 .

In addition, the guide running body B is also installed on the lower part of the sliding door 18 . The lower guide running body B is mounted on the lower guide rail 17 and is substantially the same as the guide running body B mounted on the upper guide rail 17 , and the lower guide running body B is configured to slide within the guide rail 17 . On this lower guide rail 17, relevant door parts are also installed, and the lower guide walking body B is provided with guide parts 15. The structure for attaching the guide member 15 to the lower guide carrier B is substantially the same as the structure for attaching the guide member 15 to the upper guide carrier B. As shown in FIG.

When the door closing member is installed on the upper guide rail 17 and the guide member 15 is installed on the guide traveling body B, sometimes the door closing member is not installed on the lower guide rail 17 deliberately. In addition, the door closing device of the present invention may not be attached to the lower guide rail 17 but the door closing device of the present invention may be attached to the lower guide rail 17 . Fig. 14 shows a piece of furniture with a sliding door device fitted with the door closing device of the present invention.

Next, the working principles of closing and opening the sliding door 18 using the door closing device of the present invention will be described respectively. First, the closing action of the sliding door will be described with reference to Figures 10 and 11. As shown in Figure 10A, the sliding part 1 and the fork part 2 are connected through a pivot. The state where the portion 2c is engaged with the engaged surface 7 of the case A (first case portion A ₁ ) is temporarily stopped. As the opened sliding door 18 moves towards the door closing direction (direction from left to right in FIG. 10A ), it gradually approaches the fork-shaped part 2, and as shown in FIG. The abutted piece 2b ₂ of the shape member 2 is abutted against.

As the guide body B moves further in the door-closing direction, the locking portion 15b exerts a pushing action on the abutted piece 2b ₂ , and when the rotational base 2a of the fork-shaped component 2 rotates relative to the sliding component 1, the engaging The portion 2c is disengaged from the engaged surface 7 of the case A, and the temporarily stopped state of the fork member 2 is released. Specifically, in FIG. 7B and FIG. 8B , while the rotation base 2 a is rotated clockwise, the engaging portion 2 c is disengaged from the engaged surface 7 . At this time, after the locking part 15b of _the guide traveling body B passes through the process shown in FIG. 10C and _FIG . In the approximately U-shaped recess between the abutting pieces 2b _{and 2} .

Then, the locking portion 15b and the fork member 2 are locked to each other, and the temporary stop state of the fork member 2 is released. In the state where the guide portion 6 is in contact, the fork member 2 moves in the door closing direction together with the guided protrusion piece 1d of the slide member 1 by the elastic force F of the elastic member 3 . When the sliding part 1 and the fork part 2 move to the door closing direction under the action of the elastic part 3, the resistance T generated by the meshing of the rack part 1b formed on the sliding part 1 and the gear part 4a of the buffer part 4 is directed toward the elastic part. The opposite direction of the elastic action direction of the elastic force F of 3 acts. In this way, the force obtained by subtracting the difference in the resistance T of the cushioning member 4 from the elastic force F of the elastic member 3 , that is, the force of F−T becomes the substantial door closing force P. Then, under the action of the door closing force P, the sliding door 18 produces the above-mentioned deceleration on the basis of the initial door closing speed Vn given by the person's door closing action. The door-closing action is forced to move to the door-closing end, and finally reaches the end of the door-closing direction to end the door-closing action (refer to FIG. 11B ).

Next, the opening operation of the sliding door 18 will be described with reference to FIG. 12 . First, as shown in Figure 12A, the fork-shaped part 2 is located at the door-closing end (right side in Figure 12A) at the initial stage, and the guide part 15 installed on the guide running body B and the locked piece of the fork-shaped part 2 2b ₁ Both are locked. When the sliding door 18 moves to the door opening direction (direction from right to left in FIG. 12B ) as shown in FIG. The locked piece 2b ₁ forcibly moves the fork-shaped part 2 and the sliding part 1 along the main guide part 6 to the door-opening end.

When the sliding door 18 moves further in the door opening direction and the fork-shaped part 2 reaches the engaged surface 7, the sliding restriction protrusion 1g abuts against the door-opening side end of the sliding restriction part, thereby producing a stop effect on the sliding of the sliding part 1, The slide of the slide member 1 is stopped. At this time, the engaging portion 2 c of the fork member 2 has reached the engaged surface 7 . As the sliding door 18 continues to open, the locking portion 15b of the guiding body B pulls the locked piece 2b ₁ of the fork-shaped component 2, so that the fork-shaped component 2 rotates through the rotating base 2a. Specifically, as shown in FIG. 7B , FIG. 8B , and FIG. 12C , the fork-shaped member 2 rotates counterclockwise around the rotation base 2 a, and the engaging portion 2 c moves to the engaged surface 7 to engage therewith. Under the action of the elastic force of the sliding part 1 and the elastic part 3 connected to the sliding part 1, the fork part 2 maintains the engaging part 2c and the engaged surface 7 with an appropriate pressure. Here, the fork 2 is temporarily stopped on the engaged surface 7 .

This fork-shaped part 2 is in an inclined state at the door-opening end, thereby the top of the locked piece 2b ₁ becomes lower, therefore, the locking portion 15b of the guide traveling body B breaks away from the locked piece 2b ₁ , and the locking portion 15b and the locked piece 2b 1 are separated. The locking state of both fork-shaped parts 2 is released, and the sliding door 18 moves further towards the door-opening end until the door-opening action is completed. In Fig. 10 to Fig. 12, the main guide part 6 and the engaged surface 7 are formed on the side of the first housing part _A1 , therefore, the main guide part 6 and the engaged surface 7 are indicated by double-dashed lines. draw.

Possibility of industrial use

The sliding door closing device of the present invention can forcibly pull the sliding door to the end of the door closing side, and decelerate the sliding door to an appropriate speed when closing the door is about to end, so that it can be closed well, especially the door closing device realizes a small size It can be directly assembled on the guide rail of the sliding door, so the assembly space of the door closing device on the sliding door can be very small. That is, the device of the present invention can be easily installed and the installation space can be saved.

Claims (4)

1. A door closing device for a sliding door, characterized in that a freely rotatable fork-shaped part is installed on a sliding part that can slide in an appropriate area in the housing installed at the end of the guide rail, and the sliding part is elastically The part tends to move towards the door-closing end under the action of the part, and under the action of the resistance produced by the buffer part that reduces the elastic force of the elastic part, the guiding body that walks along the guide rail is locked on the fork part. The state starts to move towards the door closing direction in the sliding area of the sliding part, A rack portion is formed on the sliding member, and the buffer member has a gear portion that engages with the rack portion and produces resistance to the movement of the sliding member in the direction of the door closing end driven by the elastic member. A slide restricting protrusion is formed on the slide member, and a slide restricting portion is formed on the case, the slide restricting projection being inserted into the slide restricting portion to restrict movement of the slide member. 2. A door closing device for a sliding door, which is characterized in that it comprises: a sliding part; The rotation of the above-mentioned rotating root is composed of an engaging part that protrudes upward; the elastic component applies an elastic force to the sliding component in the direction of the door closing end; the buffer component generates resistance to reduce the elastic force of the elastic component; the main guide part, install the sliding part, the fork part, the elastic part and the buffer part, and guide the sliding part in the horizontal direction; the casing forms an engaged surface near the door-opening end of the main guiding part, and Installed on the guide rail; the guide part is arranged on the guide traveling body running along the guide rail, and the front end of the rod extending along the moving direction is formed to be locked on the locked piece and abutted against the abutted piece The locking part; the fork-shaped part only swings when the sliding part is at the terminal position of the door opening end, the engaging part is freely engaged with the engaged surface, and a rack part is formed on the sliding part , the buffer member has a gear portion that engages with the rack portion and generates resistance to the movement of the sliding member toward the door closing end driven by the elastic member, a sliding restriction protrusion is formed on the sliding member, and A slide restricting portion is formed on the housing, and the slide restricting protrusion is inserted into the slide restricting portion to restrict movement of the sliding member. 3 . The door closing device for a sliding door according to claim 2 , wherein a sliding member operating piece and a fork operating piece protruding outward from the housing are respectively formed on the sliding member and the fork member. 4 . 4. The door-closing device for a sliding door according to claim 2, characterized in that, the engaging portion and the engaged surface are arc-shaped convex portions and arc-shaped concave portions with the pivot connection portion as the center of rotation form.

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