Door stopper

Abstract

To provide a door stopper which locks when one simply steps on a pedal part and lowers a stopper, which stops a closing door, and unlocks to store the stopper member in an original state when a door is simply pushed slightly in an opening direction.SOLUTION: The door stopper comprises: a case body A detachably attached to the inside of a door 1; a stopper member B stored in the case body A so as to move up and down, descending until a lower end 45 contacts a floor surface 2 when one steps on a pedal part 40 provided in a bottom part; an elastic member C that energizes the descending stopper member B in a direction returning to the case body A; and a lock mechanism D that maintains a descended state of the stopper member B against an energization of the elastic member C.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a door stopper that stops a door from closing, and more particularly to a door stopper that is attached to the inside of a door. [Background technology]

[0002] Door stoppers that stop a door in a desired position when it is closed by a door closer have been well known for some time. One type of door stopper is one in which the base end of a rod-shaped body is attached so that it can rotate freely relative to the door, and when in standby, it is stored along the door from the base end upwards, and when in use, the rod-shaped body is rotated so that the tip abuts the floor surface and is positioned at an appropriate angle between the floor surface and the door surface, thereby stopping the door in place like a tension rod (see Patent Document 1).

[0003] With the door stopper described in Patent Document 1, in order to reliably stop the door from closing, it is necessary to appropriately fine-tune the height and angle of the door stopper attached to the door. However, there is a problem in that the mechanism for fine-tuning the height and angle of the door stopper is complex in structure, resulting in high costs.

[0004] To address such problems, a door stopper is known which comprises an inclined surface which is a flat downward surface extending in the direction in which the door closes from the lower end of a base plate which is fixed along the face of the door, a roller which has a central shaft member on a central axis extending in the left-right direction and which is movable in contact with the inclined surface, and an elastic member for elastically urging the central shaft member generally upwards so that the upper end of the inclined surface becomes the initial position of the roller; when the roller is moved downward along the inclined surface against the elastic force of the elastic member and brought into contact with the floor surface, the force of the door trying to close causes the roller to receive a compressive force between the inclined surface and the floor surface, thereby stopping the door (see Patent Document 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3089200 [Patent Document 2] Utility Model Registration No. 3194940 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the door stopper described in Patent Document 2 above had the problem that it required a separate height adjustment mechanism to pre-set the approximate height of the door stopper relative to the door so that the roller would receive an appropriate compressive force between the inclined surface and the floor surface.

[0007] To solve the above problems, the object of the present invention is to provide a door stopper which can be locked by simply stepping on a pedal part to lower the stopper member, thereby stopping the closing door, and which can be released and the stopper member can be stored in its original state by simply pushing the door slightly in the direction to open it. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a door stopper comprising a case body that can be detachably attached to the inside of a door and a vertically movable door stopper that can be attached to the case body. And there is a gap in the door opening and closing direction. The case includes a stopper member that is housed in the case and that descends until its lower end contacts the floor surface when a pedal portion provided at the bottom is stepped on, an elastic member that biases the descending stopper member in a direction returning it to the case body, and a locking mechanism that maintains the lowered state of the stopper member against the bias of the elastic member. The lock mechanism has a locking tooth portion provided along the inner surface opposite the mounting surface of the case body and having multiple stages of teeth formed in the vertical direction, and a locking claw provided on the upper part of the stopper member and capable of locking with the teeth of the locking tooth portion, and the teeth of the locking tooth portion and the locking claw of the stopper member are allowed to lock with each other only when the stopper member is lowered, and when the pedal portion is stepped on and the lower end of the stopper member comes into contact with the floor surface, the upper part of the stopper member is inclined away from the door and the lower part is inclined toward the door due to the door closing inward, and the locking claw of the stopper member is locked with the teeth of the locking tooth portion. The present invention employs a configuration characterized by the above.

[0009] Further, as an embodiment of the door stopper, The locking teeth area plurality of stages of teeth are provided in an inclined manner so as to move away from the mounting surface of the case body as they move upward; and the stopper member has a slide base extending in the vertical direction along the mounting surface of the case body, a pedal portion protruding from the lower end of the slide base to the side opposite the door, and a floor contact portion provided to be able to swing under the pedal portion; and the stopper member has a slide base extending in the vertical direction along the mounting surface of the case body, a pedal portion protruding from the lower end of the slide base to the side opposite the door, and a floor contact portion provided to be able to be elastically deformed under the pedal portion. The configuration adopted is characterized in that the sliding base has a sliding side surface that is guided in the vertical direction relative to the case body, a stopper protrusion protruding from the upper back side, and a claw support plate portion having a locking claw protruding therefrom and capable of elastic deformation, and the locking tooth portion has guide side walls that are erected in the front-to-rear direction along both sides of the multiple stages of teeth, and the sliding base has a sliding side surface that is guided in the vertical direction relative to the guide side wall of the locking tooth portion, a stopper protrusion protruding from the upper back side, and a claw support plate portion having a locking claw protruding therefrom and capable of elastic deformation. Effect of the Invention

[0010] By adopting the above-mentioned configuration, the door stopper of the present invention allows, when the pedal portion is stepped on to lower the stopper member, the lowered state of the stopper member is maintained by the locking mechanism against the force of the elastic member, and the lower end of the stopper member comes into contact with the floor surface, thereby stopping the closing door. Furthermore, when the door stopper of the present invention is pushed slightly in the direction to open the door, the lowered state caused by the locking mechanism is released and the stopper member is stored in its original state by the bias of the elastic member, allowing the door to be closed. [Brief description of the drawings]

[0011] [Figure 1] 1A and 1B are diagrams showing a door stopper according to a first embodiment of the present invention in a standby state, in which (a) is a top view and (b) is a cross-sectional view taken along the line XX in (a). [Diagram 2]FIG. 1 is a perspective view showing a disassembled state of a door stopper according to a first embodiment of the present invention. [Diagram 3] 1A and 1B are diagrams showing the appearance of a door stopper according to a first embodiment of the present invention, in which (a) is a perspective view in a standby state, and (b) is a perspective view in a used state. [Figure 4] 1A, 1B, and 1C are diagrams showing a front case of a door stopper according to a first embodiment of the present invention, in which (a) is a front view, (b) is a side view, and (c) is a rear view. [Diagram 5] 1(b) showing the standby state of the door stopper according to the first embodiment of the present invention, where (a) is a cross-sectional view taken along the line Y1-Y1, and (b) is a cross-sectional view taken along the line Y2-Y2. [Figure 6] 1A and 1B are diagrams showing the use state of the door stopper according to the first embodiment of the present invention, in which (a) is a cross-sectional view in an upper limit locked state, and (b) is a cross-sectional view of (a) when released. [Figure 7] 1A and 1B are diagrams showing the use state of the door stopper according to the first embodiment of the present invention, in which (a) is a cross-sectional view in a lowermost locked state, and (b) is a cross-sectional view of (a) when released. [Figure 8] 1A and 1B are diagrams showing a door stopper according to a second embodiment of the present invention in a standby state, in which (a) is a top view and (b) is a cross-sectional view taken along the line X1-X1 of (a). [Figure 9] FIG. 11 is a perspective view showing an exploded state of a door stopper according to a second embodiment of the present invention. [Figure 10] 1A and 1B are diagrams showing the appearance of a door stopper according to a second embodiment of the present invention, in which (a) is a perspective view in a standby state, and (b) is a perspective view in a used state. [Figure 11] 10A, 10B, and 10C are diagrams showing a locking mechanism of a door stopper according to a second embodiment of the present invention, in which (a) is a top view, (b) is a rear view, and (c) is a side view. [Figure 12] 11A and 11B are diagrams showing the use of a door stopper according to a second embodiment of the present invention, in which (a) is a cross-sectional view in an uppermost locked state, and (b) is a cross-sectional view of (a) when released. [Figure 13]FIG. 11 is a diagram showing the shape of the floor contact portion of a door stopper according to a second embodiment of the present invention, where (a) is a perspective view from below, (b) is a top view, (c) is a front view, (d) is a side view, (e) is a rear view, and (f) is a bottom view. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Next, the door stopper of the present invention will be described with reference to the drawings of the embodiment. In the following explanation, in FIG. 1(b), the vertical direction is the "up-down direction", the left direction is the "front side" or "inside of the door", and the right direction is the "rear side" or "outside of the door".

[0013] Example 1 In FIG. 1, reference numeral 1 denotes a door that closes inward by a door closer not shown, A denotes a case body that is removably attached to the inside of the door 1, B denotes a stopper member that is housed in the case body A so as to be able to move up and down and that holds the door 1 still in the lowered state, C denotes an elastic member that urges the descending stopper member B in a direction returning it to the case body A, and D denotes a locking mechanism that maintains the lowered state of the stopper member B against the urging force of the elastic member C.

[0014] As shown in FIG. 3, the case body A is formed in a box shape that extends in the vertical direction as a whole, with a closed upper part, an open lower part, and a rear side that extends downward. 1, a magnetic sheet 5 is attached to the back side of the case body A so that the case body A can be detachably attached to the inside of the door 1. Note that, instead of the magnetic sheet 5, double-sided tape may be used to attach the case body A to the door 1.

[0015] As shown in Figures 1 and 2, the case body A comprises a flat rear case 10 arranged on the rear side (inside the door 1), and a front case 20 attached to the front side of the rear case 10 to accommodate a stopper member B that can move up and down inside the case body A, and the front case 20 has an open lower portion so as to allow the stopper member B to move up and down.

[0016] The rear case 10 is composed of a front part 11 on the front side facing the front case 20, and a rear part 12 on the rear side facing the door 1. A contact protrusion 13 that extends horizontally and functions as a first fulcrum of a stopper member B described later is formed at the lower end of the front part 11, and a mounting recess 14 is formed in the rear part 12 to mount most of the magnetic sheet 5 except for the lower part.

[0017] As shown in Figures 1 to 4, front case 20 comprises a top wall 21 covering the upper part, a pair of side walls 22 hanging down from both sides of top wall 21, a front wall 23 hanging down from the front side of top wall 21, and a rear extension wall 24 hanging down from the lower end of the rear side of side wall 22 and connected to the lower end of rear case 10, and the side surrounded by the lower ends of side wall 22 and front wall 23 is open. The rear extension wall 24 has a lower end formed with a contact lower end 24a that functions as a second fulcrum of the stopper member B described later, and a mounting recess 25 formed on the rear side for mounting the lower part of the magnetic sheet 5.

[0018] As shown in Figures 4 and 5, the front case 20 is formed on the inside of the top wall 21 and includes a hanging portion 26 for hanging an upper hook 51 of the tension coil spring 50 constituting the elastic member C, a plurality of guide portions 27 protruding from the inside of the pair of side walls 22 and guiding the up and down movement of the stopper member B, a pair of locking tooth board mounting portions 28 formed on the inside of the front wall 23 and for mounting the locking tooth board 62 of the locking tooth portion 60 constituting the locking mechanism D described later, and a regulating frame 29 for regulating the upper end position of the slide base 30 of the stopper member B.

[0019] As shown in Figures 1(b) and 2, the stopper member B includes a slide base 30 extending in the vertical direction along the front portion 11 of the rear case 10 of the case main body A, a pedal portion 40 that protrudes from the lower end of the slide base 30 to the side opposite the door 1 (the front side) and inclines downward, and a floor contact portion 45 that is arranged to be swingable from the tip of the pedal portion 40 toward the rear side.

[0020] As shown in Figures 2 and 5(a), the sliding base 30 has a rectangular shape with the center of the upper end of a flat plate cut out, and is equipped with a pair of sliding side surfaces 31 formed on both side surfaces of the sliding base 30 and guided by the guide portion 27 of the front case 20, a pair of stopper protrusions 32 protruding from both sides of the upper back side, a spring hook portion 33 for hooking the lower hook 52 of the tension coil spring 50 that constitutes the elastic member C, a rectangular slit portion 34 formed on the upper part of the sliding base 30, a thin plate-like claw support plate portion 36 that is elastically deformable and is formed inside the slit portion 34 and has a locking claw 35 protruding from the upper end on the front side, and a pair of sliding pieces 37 formed on both sides of the locking claw 35.

[0021] The pedal portion 40 is formed integrally with the slide base 30, and the connection portion between them is reinforced by an L-shaped reinforcing metal fitting 38 so that it does not break or deform. The pedal section 40 is formed sloping downward toward the front side from the lower end of the slide base 30, and includes a step 41 to be stepped on with the foot, a pedal section bearing 42 suspended from the underside of the tip of the step 41, and a weight section 43 attached to the underside of the step 41.

[0022] The floor contacting portion 45 comprises a frictional grounding piece 46 which is a pedal rubber that comes into contact with the floor surface 2 when the stopper member B is lowered, a grounding piece support portion 47 which is incorporated in the frictional grounding piece 46, and a support portion bearing 48 which is formed on both sides of the front side of the grounding piece support portion 47. The floor contacting portion 45 is swingably connected by a rotating shaft 44 between the pedal portion bearing 42 of the pedal portion 40 and the support portion bearing 48 of the floor contacting portion 45, and a leaf spring 49 urges the floor contacting portion 45 to open to a predetermined angle relative to the pedal portion 40. As shown in Figs. 2 and 3, the frictional contact piece 46 may have an uneven pattern formed on its contact surface with the floor surface 2, like the tread of a tire, in order to increase the frictional force with the floor surface 2.

[0023] As shown in Figures 1 and 2, the elastic member C is embodied as a tension coil spring 50, and includes an upper hook 51 provided at the upper end of the tension coil spring 50, a lower hook 52 provided at the lower end of the tension coil spring 50, and a protective tube 53 covering the outer peripheral surface of the tension coil spring 50.

[0024] As shown in Figures 1, 2 and 5(b), the locking mechanism D is embodied by a locking tooth portion 60 provided along the inside of the front wall 23 constituting the front case 20 of the case main body A and having multiple rows of teeth 61 formed in the vertical direction, and a locking claw 35 provided on the above-mentioned stopper member B and capable of engaging with the teeth 61 of the locking tooth portion 60. The locking tooth portion 60 includes a flat locking tooth base plate 62 on which teeth 61 that can be engaged when the locking claw 35 descends are formed downward from the middle row, and a guide rail portion 63 provided in the vertical direction along both sides of the surface on which the teeth 61 of the locking tooth base plate 62 are formed, and against which the slide piece 37 formed on the slide base 30 of the stopper member B slides.

[0025] Next, the manner of use and the effects of this embodiment will be described with reference to the drawings. As shown in Figure 2, the door stopper of this embodiment is completed by attaching a regulating frame 29 and a locking tooth portion 60 of the locking mechanism D to the front case 20 of the case main body A, then setting a stopper member B assembled from a slide base 30, a pedal portion 40 and a floor contact portion 45 together with an elastic member C to the front case 20, attaching the rear case 10 to the rear side of the front case 20, and finally attaching a magnetic sheet 5 to the mounting recesses 14 and 25 on the rear side of the case main body A, as shown in Figure 3(a).

[0026] The door stopper assembled as described above can be detachably attached to the inside of door 1 at an appropriate height from floor surface 2 (see FIGS. 6 and 7) by the magnetic force of magnetic sheet 5, as shown in FIG.

[0027] In the door stopper of this embodiment in the standby state shown in Figure 1, the stopper member B is urged in a direction (upward) to return into the case main body A by the elastic member C, and as shown in Figure 5 (a), the upper end abutment portion 30a of the slide base 30 abuts against the regulating frame 29 attached to the front case 20, thereby regulating the vertical position of the stopper member B.

[0028] At the same time, a pair of stopper protrusions 32 protruding from the rear side of the sliding base 30 abut against the front surface 11 of the rear case 10, and the lower rear surface side of the sliding base 30 is close to the abutment protrusion 13 of the rear case 10, thereby regulating the front-to-rear position of the stopper member B. However, it is not necessary for the lower rear surface side of the sliding base 30 to be close to the abutment protrusion 13 of the rear case 10, and it is acceptable for the lower rear surface side to abut against the abutment protrusion 13. In this manner, the case body A accommodates the stopper member B with a clearance (that is, a gap or play) generally in the opening and closing direction of the door 1.

[0029] Next, a method of using the door stopper of this embodiment will be described below. First, to stop the door 1 at a desired opening angle, the door 1 to which the door stopper is attached in the standby state shown in Fig. 1(b) is opened outward, and when the door 1 is at a position where it is desired to stop it, the foot is stepped on the step plate 41 of the pedal part 40 of the stopper member B, and the stopper member B starts to descend against the bias in the direction returning to the case main body A (upward) by the elastic member C. At this time, since the step plate 41 of the pedal part 40 is formed to be inclined downward on the front side, the lower part of the slide base body 30 of the stopper member B is pulled down toward the rear side and comes into contact with the abutment protrusion 13 of the rear case 10, and the upper part is inclined toward the front side, and the pair of slide pieces 37 descend while sliding against the guide rail parts 63 provided on both sides of the locking tooth base plate 62 of the locking mechanism D.

[0030] When the slide base 30 of the stopper member B starts to descend, the locking claw 35 of the slide base 30 faces a portion of the locking tooth portion 60 where the teeth 61 are not formed, so that the locking mechanism D does not function. Furthermore, when the step plate 41 of the pedal portion 40 is depressed and the sliding base 30 of the stopper member B is lowered, as shown in Figure 6 (a), the locking claw 35 engages with the upper limit tooth 61 formed on the locking tooth portion 60 of the locking mechanism D, so that only the descent of the stopper member B is permitted. As a result, the locking mechanism D becomes effective and the lowered state of the stopper member B can be maintained even if the foot is removed from the step plate 41 of the pedal portion 40.

[0031] In this way, the door stopper of this embodiment will not function effectively unless the pedal portion 40 of the stopper member B is stepped on and lowered until the locking claw 35 engages with the upper limit tooth 61 formed on the locking tooth portion 60 of the locking mechanism D. Therefore, when attaching the door stopper to the door 1, it is necessary to make the height from the floor surface 2 higher than the position shown in Figure 6(a).

[0032] After the locking mechanism D becomes active, when the pedal portion 40 is continued to be depressed, the locking claws 35 engage sequentially from the uppermost tooth 61 of the locking tooth portion 60 downwards, and the back side of the floor contacting portion 45 of the stopper member B comes into contact with the floor surface 2. However, as shown in Figure 6(a), the floor contacting portion 45 swings counterclockwise around the rotation axis 44 relative to the pedal portion 40 against the leaf spring 49, and the entire underside of the frictional contact piece 46 comes into contact with the floor surface 2, thereby increasing the frictional force of the floor contacting portion 45 against the floor surface 2.

[0033] In this way, when the pedal portion 40 is stepped on and the floor contact portion 45 comes into contact with the floor surface 2, the door 1 closes inwardly by the door closer, and the door surface side of the stopper member B is pressed in the closing direction of the door 1. As the door surface side is pressed by the door 1 and the floor contact portion 45 swings, the stopper member B tilts generally in the opening / closing direction of the door 1 within the gap of the case main body A and comes to rest together with the door 1. The inclination of the stopper member B is such that the upper part inclines away from the door 1 (the direction in which the door 1 closes) and the lower part inclines towards the door (the direction in which the door 1 opens). When the door 1 is pressed, the upper part of the stopper member B inclines away from the door 1, so that the locking claw 35 protruding toward the locking teeth portion 60 is pressed against the teeth 61 of the locking teeth portion 60, and the locking claw 35 and the locking teeth portion 60 are tightly locked together and are difficult to come off. Because the locking claw 35 and the locking teeth portion 60 are difficult to come off, the door 1 can be firmly stopped.

[0034] Next, to close the door 1 again, from the rest state shown in Figure 6(a), the door 1 is pushed slightly in the opening direction (outward), and as shown in Figure 6(b), the stopper member B returns from the state in which the upper part of the sliding base 30 is inclined toward the front side to an upright state while the floor contact portion 45 remains in contact with the floor surface 2, and the stopper protrusion 32 abuts against the front portion 11 of the rear case 10, causing the locking claw 35 to disengage from the teeth 61 of the locking tooth portion 60, and the stopper member B is released from its lowered state by the locking mechanism D.

[0035] Then, the stopper member B is pulled up toward the case body A by the force of the elastic member C, and the upper end abutment portion 30a of the slide base 30 abuts against the regulating frame 29 attached to the front case 20, returning it to the standby state shown in Figure 1 (b), so that the door 1 can be closed again by the door closer.

[0036] Next, we will explain the case where the door stopper of this embodiment is attached higher on the door 1 than in the case shown in Figure 6. When the footboard 41 of the pedal portion 40 shown in Figure 1(b) is pressed down and the sliding base 30 of the stopper member B begins to descend, the lower part of the sliding base 30 is pulled down toward the rear side and comes into contact with the abutment protrusion 13 of the rear case 10, while the upper part tilts toward the front side, and the pair of sliding pieces 37 descend while sliding against the guide rail portions 63 provided on both sides of the locking tooth base plate 62 of the locking mechanism D.

[0037] Furthermore, when the stopper member B descends, as shown in Figure 7(a), the back surface of the sliding base 30 separates from the abutment protrusion 13 of the rear case 10 and abuts against the abutment lower end portion 24a, which is the second fulcrum of the rear extension wall 24 formed on the front case 20, and the locking claw 35 of the sliding base 30 engages with the lower limit tooth 61 formed on the locking tooth portion 60 of the locking mechanism D, thereby activating the locking mechanism D. As shown in Figure 3(b), the lowered state of the stopper member B can be maintained even if the foot is removed from the step plate 41 of the pedal portion 40.

[0038] Furthermore, to close the door 1 again, from the rest state shown in Figure 7(a), pushing the door 1 slightly in the opening direction (outward) causes the stopper member B to return from the state in which the upper part of the sliding base 30 is inclined toward the front side to an upright state, with the floor contact portion 45 remaining in contact with the floor surface 2, as shown in Figure 7(b), and the stopper protrusion 32 abuts against the front portion 11 of the rear case 10, causing the locking claw 35 to disengage from the teeth 61 of the locking tooth portion 60. As a result, the stopper member B is released from its lowered state by the locking mechanism D, and the stopper member B is pulled up toward the case body A by the force of the elastic member C and returned to the standby state shown in Figure 1(b), allowing the door 1 to be closed again.

[0039] In this way, the door stopper of this embodiment can be lowered by stepping on the foot plate 41 of the pedal portion 40 of the stopper member B until the locking claw 35 engages with the lowermost tooth 61 formed on the locking tooth portion 60 of the locking mechanism D. In order for the locking mechanism D to function effectively, when the door stopper is attached to the door 1, it is necessary to ensure that its height from the floor surface 2 is lower than the position shown in Figure 7(a).

[0040] Example 2 Next, the case body A, the stopper member B and the lock mechanism of the first embodiment D A second embodiment in which the above configuration is modified will be described. In the following, the same components as those in the first embodiment are denoted by the same reference numerals, and the differences will be mainly described.

[0041] In Figure 8, Aa is a case body that is removably attached to the inside of the door 1, Ba is a stopper member that is housed in the case body Aa so as to be able to move up and down and that holds the door 1 still in a lowered state, C is an elastic member that urges the descending stopper member Ba in a direction returning it to the case body Aa, and Da is a locking mechanism that maintains the lowered state of the stopper member Ba against the urging of the elastic member C.

[0042] In Example 1, the case body A has a magnetic sheet 5 attached to its rear side so that it can be attached and detached freely to the inside of the door 1, whereas in this example, as shown in Figures 8 and 9, the case body Aa has multiple plate-shaped magnets 7 (two in this example) attached to its rear side, surrounded by a yoke 6 having a U-shaped cross section, although the number and positions of the magnets 7 attached can be changed as necessary.

[0043] As shown in Figures 8(b) and 9, the case main body Aa comprises a flat rear case 70 arranged on the rear side (inside the door 1), and a front case 80 attached to the front side of the rear case 70 to accommodate a stopper member Ba that can move up and down inside the case main body Aa, and the front case 80 has an open lower portion to allow the stopper member Ba to move up and down.

[0044] The rear case 70 is composed of a front part 71 on the front side facing the front case 80, and a rear part 72 on the rear side facing the door 1. A contact protrusion 73 that extends horizontally and functions as a first fulcrum of a stopper member Ba described later is formed at the lower end of the front part 71, and a plurality of mounting recesses 74 (two in this embodiment) are formed in the rear part 72 for mounting the yoke 6 and the magnet 7, and an anti-slip sheet 8 that has been treated to be anti-slip is attached to the surface facing the door 1 of the rear part 72 to which the yoke 6 and the magnet 7 are mounted. Furthermore, the rear case 70 has a locking protrusion 75 formed at its upper end for engagement with the front case 80, and a lower end locking portion 76 formed at its lower end.

[0045] As shown in Figures 8 to 10, front case 80 comprises a top wall 81 covering the upper part, a pair of side walls 82 hanging down from both sides of top wall 81, a front wall 83 hanging down from the front side of top wall 81, and a rear extension wall 84 hanging down from the lower end of the rear side of side wall 82 and connected to the lower end of rear case 70, and the side surrounded by the lower ends of side wall 82 and front wall 83 is open.

[0046] The front case 80 is formed on the inside of the top wall 81 and has an engagement recess 85 that engages with the engagement protrusion 75 of the rear case 70, and a hanging portion 86 that is formed at the bottom of the engagement protrusion 75 and hooks the upper hook 51 of the tension coil spring 50 that constitutes the elastic member C described later. In addition, the rear extension wall 84 of the front case 80 has a lower end formed with a contact lower end portion 84a that functions as a second fulcrum of the stopper member Ba described later, and an engagement step portion 87 formed on the upper end side that engages with the lower end locking portion 76 of the rear case 70.

[0047] As shown in Figures 8(b) and 9, the stopper member Ba includes a slide base 90 extending in the vertical direction along the front portion 71 of the rear case 70 of the case main body Aa, a pedal portion 100 extending from the lower end of the slide base 90 to the side opposite the door 1 (the front side), and an elastically deformable floor contact portion 105 attached to the underside of the pedal portion 100. In addition, in Example 1, the floor contacting portion 45 is configured so that the pedal portion bearing 42 of the pedal portion 40 and the support portion bearing 48 of the floor contacting portion 45 are connected by a rotating shaft 44 and are capable of swinging from the tip of the pedal portion 40 toward the back side, whereas in this example, the floor contacting portion 105 is configured so that the frictional contact piece 106 itself is elastically deformable.

[0048] As shown in Figures 9 and 10, the slide base 90 is provided with a pair of slide side surfaces 91 formed on both side surfaces and guided by guide side walls 114 of the locking teeth portion 110 that constitutes the locking mechanism Da described later, a pair of stopper protrusions 92 protruding from both sides of the upper back side, a spring hook portion 93 for hooking the lower hook 52 of the tension coil spring 50 that constitutes the elastic member C, a rectangular slit portion 94 formed on the upper part of the slide base 90, a thin, elastically deformable claw support plate portion 96 formed inside the slit portion 94 and having a locking claw 95 protruding from the upper end of the front side, and a pair of slide pieces 97 formed on both sides of the locking claw 95. Furthermore, a pair of regulating pieces 98 made of a material such as synthetic rubber are attached to the front surface 71 of the rear case 70 to regulate the upper end position of the slide base 90 of the stopper member Ba and to act as cushioning material to absorb impact when the slide base 90 rises and collides.

[0049] In Example 1, the pedal section 40 is reinforced by an L-shaped reinforcing metal fitting 38 to prevent the connection with the sliding base 30 from being damaged or deformed, and comprises a foot plate 41 to be stepped on, a pedal section bearing 42 suspended from the underside of the tip of the foot plate 41, and a weight section 43 attached to the underside of the foot plate 41, whereas in this example, the pedal section 100 omits the L-shaped reinforcing metal fitting 38 and comprises a foot plate 101 which is formed integrally with the sliding base 90 from, for example, polyacetal resin, protrudes from the lower end of the sliding base 90 toward the front side, and has an upper surface to be stepped on that slopes downward toward the front side, and a grounding piece mounting member 102 which is formed at a predetermined distance from the underside of the foot plate 101. In this embodiment, the grounding piece mounting member 102 comprises a spacing leg 103 that is suspended from the underside of the front side of the step board 101, and a mounting plate 104 that is formed from the lower end of the spacing leg 103 to the underside of the step board 101 while maintaining a predetermined distance therebetween, and for mounting the floor contact portion 105 described later.

[0050] In the first embodiment, the floor contact portion 45 includes a frictional ground piece 46, a ground piece support portion 47 that is built into the frictional ground piece 46, and support portion bearings 48 that are formed on both sides of the front side of the ground piece support portion 47. The pedal portion bearing 42 of the pedal portion 40 and the support portion bearing 48 are pivotally connected to each other by a rotating shaft 44, and are biased by a leaf spring 49 to open to a predetermined angle relative to the pedal portion 40. In contrast, in the present embodiment, the floor contact portion 105 is biased to open to a predetermined angle relative to the pedal portion 40 when the stopper member Ba descends. The pedal section 100 further comprises a frictional grounding piece 106 that comes into contact with the floor surface 2, an attachment portion 107 formed on the front side of the frictional grounding piece 106 and that fits into the grounding piece mounting member 102 of the pedal section 100, and a deformable leg portion 108 that stands upright from the back side of the frictional grounding piece 106 toward the grounding piece mounting member 102. The floor-contacting portion 105 is formed of an elastomer that is elastically deformable within a predetermined range relative to the pedal section 100, and examples of such elastomer include natural rubber, synthetic rubber, silicone rubber, and thermoplastic elastomer.

[0051] 13, the floor contact part 105 is formed with a block or stripe pattern of projections and recesses like tire treads on the contact surface 106a of the frictional contact piece 106, which is the pedal rubber, so that the door 1 can stop not only by elastic deformation but also by being more closely attached to the floor surface 2. This makes it possible for the door 1 to easily stop on various floor surfaces 2, whether the floor surface 2 is a smooth surface such as a polyvinyl chloride tile or a rough tile.

[0052] In the first embodiment, the outer peripheral surface of the tension coil spring 50, which is the elastic member C, is covered by a protective tube 53, whereas in the present embodiment, as shown in Figures 8 and 9, the tension coil spring 50 does not include the protective tube 53 and is provided with an upper hook 51 that is hooked onto the hanging portion 86 of the front case 80, and a lower hook 52 that is hooked onto the spring hook portion 93 of the slide base 90. In this embodiment, the protective tube 53 is omitted, but the tension coil spring 50 may be covered with the protective tube 53.

[0053] As shown in Figures 8, 9 and 11, the locking mechanism Da is embodied by a locking tooth portion 110 provided along the inside of the front wall 83 constituting the front case 80 of the case main body Aa and having multiple stages of teeth 111 formed in the vertical direction, and a locking claw 95 provided on the above-mentioned stopper member Ba and capable of engaging with the teeth 111 of the locking tooth portion 110. The locking tooth portion 110 includes an inclined plate-shaped locking tooth substrate 112 on which teeth 111 that can be engaged when the locking claw 95 descends are formed downward from the middle stage, a pair of guide rail portions 113 provided in the vertical direction along both sides of the surface on which the teeth 111 of the locking tooth substrate 112 are formed and against which the slide piece 97 formed on the slide base 90 of the stopper member Ba slides, and a pair of guide side walls 114 erected in the front-rear direction from the outside of each guide rail portion 113 and guiding the slide side surface 91 of the slide base 90. In addition, in Example 1, the locking tooth portion 60 is provided on a flat locking tooth substrate 62 parallel to the back surface portion 12 of the rear case 10, which is the mounting surface of the case body A, whereas in this example, the locking tooth portion 110 is provided on the locking tooth substrate 112 with the teeth 111 inclined in an upward direction relative to the back surface portion 72 of the rear case 70, which is the mounting surface of the case body Aa, so that the teeth 111 become more distant from the back surface portion 72 as they move upward.

[0054] Next, the manner of use and the effects of this embodiment will be described with reference to the drawings. As shown in Figure 9, the door stopper of this embodiment is completed by attaching the locking teeth portion 110 of the locking mechanism Da to the front case 80 of the case main body Aa, then setting the stopper member Ba assembled from the slide base 90, pedal portion 100 and floor contact portion 105 together with the elastic member C in the front case 80, attaching a regulating piece 98 to the front portion 71, and attaching the rear case 70 having the yoke 6 and magnet 7 attached to the mounting recess 74 in the rear portion 72 to the rear side of the front case 80, and finally adhering the anti-slip sheet 8 to the rear side of the case main body Aa, as shown in Figure 10(a).

[0055] The door stopper assembled as described above can be detachably attached to the inside of door 1 at an appropriate height from floor surface 2 (see FIG. 12) by the magnetic force of yoke 6 and magnet 7, as shown in FIG.

[0056] In the door stopper of this embodiment in the standby state shown in Figure 8, the stopper member Ba is urged in a direction (upward) toward the return side into the case main body Aa by the elastic member C, and the upper end abutment portion 90a of the slide base 90 abuts against a regulating piece 98 attached to the rear case 70, thereby regulating the vertical position of the stopper member Ba.

[0057] At the same time, a pair of stopper protrusions 92 protruding from the rear side of the slide base 90 abut against the front portion 71 of the rear case 70, and the lower portion of the rear side of the slide base 90 comes close to the abutment protrusions 73 of the rear case 70, thereby regulating the fore-and-aft position of the stopper member Ba.

[0058] Next, a method of using the door stopper of this embodiment will be described below. First, to stop the door 1 at a desired opening angle, the door 1 to which the door stopper is attached in the standby state shown in Fig. 8(b) is opened outward, and when the door 1 is at a position where it is desired to stop it, the foot is stepped on the step plate 101 of the pedal part 100 of the stopper member Ba, and the stopper member Ba starts to descend against the bias in the direction returning to the case main body Aa (upward) by the elastic member C. At this time, since the step plate 101 of the pedal part 100 is formed to be inclined downward toward the front side, the lower part of the slide base body 90 of the stopper member Ba is pulled down toward the rear side and comes into contact with the abutment protrusion 73 of the rear case 70, and the upper part is inclined toward the front side, and the pair of slide pieces 97 descend while sliding against the guide rail parts 113 provided on both sides of the locking tooth base plate 112 of the locking mechanism Da.

[0059] When the sliding base 90 of the stopper member Ba begins to descend, the locking mechanism Da does not function because the locking claw 95 of the sliding base 90 faces a portion of the locking tooth portion 110 where the teeth 111 are not formed. However, when the footplate 101 of the pedal portion 100 is further depressed and the sliding base 90 of the stopper member Ba descends, as shown in Figure 12(a), the locking claw 95 engages with the upper limit tooth 111 formed on the locking tooth portion 110 of the locking mechanism Da, and only the descent of the stopper member Ba is permitted, so the locking mechanism Da becomes effective and the stopper member Ba can be maintained in its descended state even if the foot is removed from the footplate 101 of the pedal portion 100.

[0060] In this way, the door stopper of this embodiment will not function effectively unless the pedal portion 100 of the stopper member Ba is stepped on and lowered until the locking claw 95 engages with the upper limit tooth 111 formed on the locking tooth portion 110 of the locking mechanism Da. Therefore, when attaching the door stopper to the door 1, it is necessary to make the height from the floor surface 2 higher than the position shown in Figure 12(a).

[0061] After the locking mechanism Da becomes active, when the pedal portion 100 is continued to be depressed, the locking claws 95 are successively locked from the uppermost tooth 111 of the locking tooth portion 110 downwards, and the rear side of the floor contacting portion 105 of the stopper member Ba comes into contact with the floor surface 2 first. However, as shown in FIG. 12(a), due to the deformation of the deforming leg portion 108, the rear side of the floor contacting portion 105 elastically deforms more than the front side with respect to the pedal portion 100, and the entire contact surface 106a of the frictional contact piece 106 comes into contact with the floor surface 2, thereby increasing the frictional force of the floor contacting portion 105 against the floor surface 2.

[0062] In this way, when the pedal portion 100 is stepped on and the contact surface 106a of the frictional contact piece 106 of the floor contact portion 105 comes into contact with the floor surface 2, the door surface side of the stopper member Ba is pressed in the closing direction of the door 1 by the door 1 which closes inward by the door closer. As the door surface side is pressed by the door 1 and the floor contact portion 105 elastically deforms, the stopper member Ba inclines roughly in the opening / closing direction of the door 1 within the gap of the case main body Aa and comes to rest together with the door 1. The inclination of the stopper member Ba is such that the upper part inclines away from the door 1 (the direction in which the door 1 closes) and the lower part inclines towards the door (the direction in which the door 1 opens). When the door 1 is pressed, the upper part of the stopper member Ba inclines away from the door 1, so that the locking claw 95 protruding towards the locking tooth portion 110 is pressed against the teeth 111 of the locking tooth portion 110, and the locking claw 95 and the locking tooth portion 110 are tightly locked together and are difficult to come off. Since the locking claw 95 and the locking tooth portion 110 are difficult to come off, the door 1 can be firmly stopped.

[0063] Next, to close the door 1 again, from the rest state shown in Figure 12(a), the door 1 is pushed slightly in the opening direction (outward), and as shown in Figure 12(b), the stopper member Ba returns from the state in which the upper part of the sliding base 90 is inclined toward the front side to an upright state with the floor contact portion 105 still in contact with the floor surface 2, and the stopper protrusion 92 abuts against the front portion 71 of the rear case 70, causing the locking claw 95 to disengage from the teeth 111 of the locking tooth portion 110, and the stopper member Ba is released (released) from its lowered state by the locking mechanism Da.

[0064] Then, the stopper member Ba is pulled up toward the case main body Aa by the force of the elastic member C, and the upper end abutment portion 90a of the slide base 90 abuts against the regulating piece 98 attached to the rear case 70 while absorbing the impact, and is returned to the standby state shown in Figure 8 (b), so that the door 1 can be closed again by the door closer.

[0065] In this way, the door stopper of this embodiment can simplify the structure of the pedal portion 100 more than the door stopper of embodiment 1 by forming the floor contact portion 105 attached to the pedal portion 100 of the stopper member Ba to be elastically deformable. In addition, the locking tooth portion 110 that constitutes the locking mechanism Da is provided on the locking tooth substrate 112 with the teeth 111 in an inclined state so that the teeth 111 move away from the rear surface portion 72 of the rear case 70 the further upward the locking tooth portion 110 moves relative to the rear surface portion 72. Therefore, once the stopper member Ba is released from engagement with the teeth 111 of the locking tooth portion 110 by the locking claw 95, the horizontal distance between the stopper member Ba and the teeth 111 of the locking tooth portion 110 increases as the stopper member Ba rises due to the force of the elastic member C, and the stopper member Ba can reliably return to the standby state. [Industrial Applicability]

[0066] In the door stopper of the present invention, when the pedal portion is depressed to lower the stopper member, the locking mechanism maintains the lowered state of the stopper member against the force of the elastic member, and the lower end of the stopper member comes into contact with the floor surface, thereby stopping the door from closing.Furthermore, when the door is pushed slightly in the direction of opening, the locking mechanism releases the lowered state and the stopper member is returned to its original state by the force of the elastic member, allowing the door to be closed.This is particularly suitable as a door stopper to be retrofitted to an existing door. [Explanation of symbols]

[0067] A, Aa Case body B, Ba stopper parts C Elastic member D, Da locking mechanism 1 Door 2. Floor surface 5. Magnetic Sheet 6. York 7. Magnets 8. Anti-slip sheet 10, 70 Rear case 11, 71 Front part 12, 72 Back part 13, 73 Abutment protrusion (first fulcrum) 14, 25, 74 Mounting recess 20, 80 Front case 21, 81 Ceiling wall 22, 82 side wall 23, 83 Front wall 24, 84 Rear extension wall 24a, 84a Lower end of contact (second fulcrum) 26, 86 Hanging part 27 Guide section 28 Locking tooth base mounting part 29 Regulatory Framework 30, 90 Slide base 30a, 90a Upper end contact part 31, 91 Slide side 32, 92 Stopper protrusion 33, 93 Spring hook 34, 94 Slit section 35, 95 Locking claw 36, 96 Claw support plate part 37, 97 Slide piece 38 Reinforcement bracket 40, 100 Pedal section 41, 101 Tread 42 Pedal bearing 43 Weight section 44 Rotational Axis 45, 105 Floor surface area (lower end) 46, 106 Friction contact piece (pedal rubber) 47 Grounding piece support part 48 Support bearing 49 Leaf Spring 50 Tension coil spring 51 Upper hook 52 Lower Hook 53 Protective tube 60, 110 Locking teeth 61, 111 teeth 62, 112 Locking tooth base plate 63, 113 Guide rail part 75 Locking protrusion 76 Lower end locking part 85 Engagement recess 87 Engagement stepped part 98 Regulation piece 102 Grounding piece attachment member 103 Spacing leg 104 Mounting plate 106a Ground plane 107 Fitting part 108 Deformed Legs 114 Guide side wall

Claims

1. A case body that can be detachably attached to the inside of the door; a stopper member that is movable up and down within the case body, is accommodated with a clearance in the door opening and closing direction, and descends until its lower end touches the floor surface when a pedal portion provided at the bottom is stepped on; an elastic member that biases the descending stopper member in a direction returning it to the case body; a lock mechanism that maintains the lowered state of the stopper member against the bias of the elastic member, the locking mechanism is provided along an inner surface of the case body opposite to the mounting surface and includes a locking teeth portion having multiple stages of teeth in the vertical direction, and a locking claw is provided on an upper portion of the stopper member and capable of engaging with the teeth of the locking teeth portion; The teeth of the locking teeth portion and the locking claw of the stopper member are allowed to lock only when the stopper member is lowered, This door stopper is characterized in that when the pedal portion is stepped on and the lower end portion comes into contact with the floor surface, the upper portion of the stopper member is inclined away from the door and the lower portion is inclined toward the door as the door closes inward, so that the locking claws of the stopper member are locked with the teeth of the locking tooth portion.

2. A door stopper as described in claim 1, characterized in that the locking teeth are arranged in multiple stages at an incline so that the further upward they are from the mounting surface of the case body, the further away they are from the mounting surface.

3. A door stopper as described in claim 1, characterized in that the stopper member has a slide base extending in the vertical direction along the mounting surface of the case body, a pedal portion extending from the lower end of the slide base to the side opposite the door, and a floor contact portion swingably provided at the bottom of the pedal portion.

4. A door stopper as described in claim 1 or 2, characterized in that the stopper member has a slide base extending in the vertical direction along the mounting surface of the case body, a pedal portion protruding from the lower end of the slide base to the opposite side of the door, and a floor contact portion provided at the bottom of the pedal portion in an elastically deformable manner.

5. A door stopper as described in claim 3, characterized in that the slide base has a slide side surface that is guided in the vertical direction relative to the case body, a stopper convex portion protruding from the upper part of the rear side, and a claw support plate portion having a locking claw protruding therefrom and capable of elastic deformation.

6. The locking teeth portion has guide side walls erected in the front-rear direction along both sides of the multiple stages of teeth, The door stopper according to claim 4, characterized in that the slide base has a slide side surface that is guided in the vertical direction relative to the guide side wall of the locking tooth portion, a stopper protrusion protruding from the upper part of the back side, and a claw support plate portion having a locking claw protruding therefrom and capable of elastic deformation.

Images