Arm stopper and mounting mechanism of arm stopper

Abstract

To provide an arm stopper capable of reducing a protrusion amount of a fastening member from a guide rail.SOLUTION: The arm stopper for defining an open position of a door comprises: a guide rail 2; a slider provided on the guide rail 2 so as to be movable in a lengthwise direction, to which an arm is joined in a rotatable manner; and a stopper 7 mounted on the guide rail 2, which restricts a movement of the slider. An engagement piece 2c protruding towards an opposing side wall part 2b is formed nearer to a bottom wall part 2a side than an end part on an open side of the side wall part 2b of the guide rail 2. An open part 2d is formed between the engagement pieces 2c, and the stopper 7 is mounted on the engagement piece 2c of the guide rail 2 using a fastening member 4.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to an arm stopper for determining the open position of a door and an attachment structure for the arm stopper. [Background technology]

[0002] An arm stopper for determining the open position of a door is known (see Patent Document 1). As shown in Fig. 8, arm stopper 41 includes guide rail 42 and slider 44 that is disposed within guide rail 42 so as to be movable in the longitudinal direction and to which arm 43 is rotatably connected (see Patent Document 1). For example, if guide rail 42 is attached to door 31 and arm 43 is rotatably attached to frame 32 via bracket 45, slider 44 moves within guide rail 42 in the longitudinal direction as door 31 opens and closes. Arm stopper 41 may be inverted, and guide rail 42 may be attached to frame 32, with arm 43 rotatably attached to door 31 via bracket 45.

[0003] In order to determine the open position of the door 31, a stopper 48 that restricts the movement of the slider 44 is attached to the guide rail 42. When the door 31 is opened to the open position, the slider 44 abuts against the stopper 48, restricting the movement of the slider 44 and determining the open position of the door 31.

[0004] To adjust the open position of the door 31, the stopper 48 is attached to the guide rail 42 so that its position can be adjusted in the length direction. Locking pieces 42b that protrude toward the opposing side wall 42a are formed at the upper ends of the side wall portions 42a of the guide rail 42. An opening 42c is formed between the locking pieces 42b. The stopper 48 is attached to the locking pieces 42b of the guide rail 42 using fastening members 46.

[0005] To adjust the position of the stopper 48, a tool can be inserted into the narrow space between the ceiling and the guide rail 42 attached to the door 31, and the fastening member 46 can be loosened. After adjusting the position of the stopper 48, the fastening member 46 can be tightened to fix the stopper 48 to the guide rail 42. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-152702 Summary of the Invention [Problem to be solved by the invention]

[0007] However, conventional arm stoppers have a problem in that the fastening member 46 protrudes significantly from the guide rail 42. For this reason, for example, when the guide rail 42 is attached to the door 31, it is necessary to increase the space between the guide rail 42 and the frame 32, which results in an unattractive appearance.

[0008] The present invention has been made in consideration of the above problems, and aims to provide an arm stopper and an arm stopper mounting structure that can reduce the amount of protrusion of the fastening member from the guide rail. [Means for solving the problem]

[0009] In order to solve the above problem, the arm stopper of the present invention is an arm stopper for determining the open position of a door, and comprises a guide rail, a slider that is arranged on the guide rail so as to be movable in the longitudinal direction and to which an arm is rotatably connected, and a stopper that is attached to the guide rail and restricts the movement of the slider, and the arm stopper has locking pieces that protrude toward the opposing side wall portion on the bottom wall portion side of the open end of the side wall portion of the guide rail, an opening is formed between the locking pieces, and the stopper is attached to the locking pieces of the guide rail using a fastening member.

[0010] The mounting structure for an arm stopper of the present invention is an mounting structure for an arm stopper that includes the arm stopper, a door having a recess formed on its upper end surface into which the guide rail is embedded and a notch formed into which a tool that engages with the fastening member is inserted, and a frame to which the tip of the arm is rotatably connected via a bracket. [Effects of the Invention]

[0011] According to the arm stopper of the present invention, the amount of protrusion of the fastening member from the guide rail can be reduced.

[0012] According to the arm stopper mounting structure of the present invention, the space between the guide rail and the frame can be reduced, resulting in an improved appearance. [Brief explanation of the drawings]

[0013] [Figure 1] 10 is a perspective view of the arm stopper according to the present embodiment in which the guide rail is fitted into the upper part of the door. FIG. [Figure 2] FIG. [Figure 3] FIG. 10 is a cross-sectional view taken along the length of the arm stopper when the door is in the closed position. [Figure 4] 10 is a cross-sectional view of the arm stopper along its length when the door is in an open position. FIG. [Figure 5] FIG. 5 is an enlarged view of part V in FIG. 4. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. [Figure 7] FIG. 10 is a cross-sectional view of the guide rail at a right angle, showing the fitting of the arm stopper. [Figure 8] FIG. 10 is a perspective view of a conventional arm stopper. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an arm stopper and an arm stopper mounting structure according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, the arm stopper and the arm stopper mounting structure of the present invention can be embodied in various forms and are not limited to the embodiments described in this specification. The present embodiment is provided with the intention that those skilled in the art will be able to fully understand the invention by fully disclosing the specification.

[0015] As shown in FIG. 1, the arm stopper 1 includes a guide rail 2 that is attached to a door 11. The guide rail 2 has a generally U-shaped cross section that opens upward, and extends along the door 11. End caps 3a and 3b are attached to both ends of the guide rail 2 in the longitudinal direction. The guide rail 2 is attached to the door 11 by a flat head screw or the like (not shown) that passes through an opening hole 2a1 (see FIG. 3) in the guide rail 2.

[0016] A recess 11a into which the guide rail 2 is embedded is formed on the upper end surface of the door 11. In addition, a notch 11b connected to the recess 11a is formed on the upper end of the door 11. When adjusting the position of the stopper 7, a tool is inserted into this notch 11b and engaged with the fastening member 4 of the stopper 7 to loosen or tighten the fastening member 4.

[0017] A slider 5 is disposed within the guide rail 2 so as to be movable in the longitudinal direction. An arm 6 is rotatably connected to the slider 5. As shown in FIG. 2 , the base end of the arm 6 is rotatably connected to the slider 5 around a pivot 13. The tip end of the arm 6 is rotatably connected to a bracket 14 attached to the underside of the frame 12 around a pivot 15.

[0018] As shown in FIG. 3, when the door 11 is closed, the slider 5 is positioned on the end cap 3a side. An arm 6 is rotatably connected between the slider 5 and the bracket 14. Therefore, when the door 11 is opened, the slider 5 moves longitudinally along the guide rail 2 toward the stopper 7. As shown in FIG. 4, when the slider 5 reaches the stopper 7, the slider 5 abuts against the bumper 21 of the stopper 7, thereby determining the open position of the door 11. At this time, the recess 5a of the slider 5 engages with the roller 23 of the swinging member 22, thereby maintaining the open position of the door 11. When the door 11 is closed from the open position, the reverse of the above operation is performed. The open position of the door 11 is, for example, a position rotated approximately 90 to 110 degrees relative to the frame.

[0019] 3 to 5 show the configurations of the slider 5 and the stopper 7. The slider 5 has a cross-sectional shape complementary to that of the guide rail 2 so that it can slide along the guide rail 2. A pivot 13, to which the arm 6 is connected, is rotatably fitted in the slider 5. The slider 5 also has a recess 5a formed therein that engages with the roller 23 of the swinging member 22 of the stopper 7. The recess 5a has a generally V-shaped cross section and has two inclined surfaces. The slider 5 also has an inclined surface 5b formed therein that guides the roller 23 into the recess 5a and that is continuous with the recess 5a. The inclined surface 5b slopes downward toward the stopper 7. As shown in FIG. 5, the wall 5c of the slider 5 on the stopper 7 side abuts against the bumper 21 of the stopper 7, thereby determining the open position of the door 11.

[0020] As shown in FIG. 5, the stopper 7 is attached to the locking piece 2c of the guide rail 2 using a fastening member 4. As shown in the perpendicular cross-sectional view of the guide rail in FIG. 6, the guide rail 2 has a bottom wall 2a and a side wall 2b. A locking piece 2c protruding toward the opposing side wall 2b is formed on the bottom wall 2a side of the open end of the side wall 2b of the guide rail 2 (in other words, below the upper end of the side wall 2b of the guide rail 2). An upper end surface 2c1 of the locking piece 2c is located below an upper end surface 2b1 of the side wall 2b, forming a step between them. An opening 2d through which the fastening member 4 passes is formed between the locking pieces 2c.

[0021] The locking piece 2c of the guide rail 2 is sandwiched between a clamp plate 25 of the stopper 7 and a base 24 of the stopper 7. A hole 25a through which the fastening member 4 passes is formed in the clamp plate 25. A screw 24a that screws into the fastening member 4 is formed in the base 24. When the fastening member 4 is tightened, the locking piece 2c is sandwiched between the clamp plate 25 and the base 24, and the stopper 7 is fixed to the guide rail 2. When the fastening member 4 is loosened, the stopper 7 becomes movable in the longitudinal direction of the guide rail 2.

[0022] The clamp plate 25 is a generally rectangular plate in plan view. The height of the clamp plate 25 is approximately equal to or slightly greater than the height from the upper end surface 2c1 of the locking piece 2c to the upper end surface 2b1 of the side wall portion 2b. The head 4a of the fastening member 4 protrudes from the guide rail 2. The width of the clamp plate 25 is approximately equal to the inside dimension between the side wall portions 2b, and the clamp plate 25 rests on the locking piece 2c. The movement of the clamp plate 25 in the length direction of the guide rail 2 is guided by the side wall portions 2b and the locking piece 2c. The cross-sectional shape of the base 24 is formed complementary to the cross-sectional shape of the guide rail 2 so that it can slide on the guide rail 2. The movement of the base 24 in the length direction of the guide rail 2 is guided by the bottom wall portion 2a, the side wall portions 2b, and the locking piece 2c.

[0023] As shown in FIG. 5 , a swinging member 22 is attached to a base 24 of the stopper 7 so as to be swingable around a horizontal pivot 26. An extension 24a that supports the horizontal pivot 26 is integrally formed with the base 24. A roller 23 is provided at one end of the swinging member 22 so as to be rotatable around a horizontal axis 27. A coil spring 28 is interposed between the base 24 and the swinging member 22 as a biasing means. The coil spring 28 biases the other end of the swinging member 22 upward in the figure, biasing the roller 23 of the swinging member 22 located on the opposite side of the horizontal pivot 26 downward in the figure, thereby engaging with the recess 5a of the slider 5. When the door 11 is closed from the open position, the recess 5a of the slider 5 and the roller 23 of the swinging member 22 are disengaged, and the slider 5 moves away from the stopper 7.

[0024] The arm stopper 1 of this embodiment has the following advantages. Locking pieces 2c that protrude toward the opposing side wall 2b are formed closer to the bottom wall 2a than the open end of the side wall 2b of the guide rail 2, and openings 2d are formed between the locking pieces 2c. The stopper 7 is attached to the locking pieces 2c of the guide rail 2 using fastening members 4, so that the amount of protrusion P of the heads 4a of the fastening members 4 from the guide rail 2 can be reduced, as shown in Figure 7. The space g between the guide rail 2 and the frame 12 can also be reduced, improving the appearance.

[0025] The locking piece 2c of the guide rail 2 is sandwiched between a clamp plate 25 through which the fastening member 4 passes and a base 24 to which the fastening member 4 is screwed, so that the stopper 7 can be firmly attached to the guide rail 2 and the position of the stopper 7 can be easily adjusted.

[0026] The stopper 7 includes a swinging member 22 having a roller 23 at one end thereof and a coil spring 28 that biases the other end of the swinging member 22, so that the door 11 can be maintained in the open position.

[0027] The present invention is not limited to the above-described embodiment, and can be embodied in other embodiments without departing from the spirit of the present invention.

[0028] In the above embodiment, the guide rail is attached to the door and the arm is rotatably connected to the frame via a bracket, but the guide rail may also be attached to the frame and the arm may be rotatably connected to the door via a bracket.

[0029] In the above embodiment, the stopper is provided with a swinging member and a coil spring to hold the door in the open position, but these may be omitted and the stopper may not be provided with the function of holding the door.

[0030] A closer such as a gas damper may be provided to automatically close the door when it is in the open position. [Explanation of symbols]

[0031] 1...Arm stopper 2...Guide rail 2a…Bottom wall part 2b...Side wall part 2c...locking piece 2d…Opening 4...Fastening member 5...Slider 5a...recess 6...Arm 7...Stopper 11...Door 12...frame 22...Swinging member 23...Laura 24...Bass 25...Clamp plate 28... Coil spring (biasing means)

Claims

1. An arm stopper for determining the opening position of the door, Guide rails and a slider disposed on the guide rail so as to be movable in a longitudinal direction, and having an arm rotatably connected thereto; a stopper attached to the guide rail to restrict movement of the slider, a locking piece protruding toward the opposing side wall portion is formed on the bottom wall portion side of the open end of the side wall portion of the guide rail, and an opening is formed between the locking pieces; An arm stopper in which the stopper is attached to the locking piece of the guide rail using a fastening member.

2. 2. The arm stopper according to claim 1, wherein the locking piece of the guide rail is sandwiched between a clamp plate through which the fastening member passes and a base into which the fastening member is screwed.

3. The stopper is a swinging member having a roller at one end thereof which is releasably engaged with a recess of the slider; 3. The arm stopper according to claim 1, further comprising: a biasing means for biasing the other end of the swinging member so that the roller engages with the recess.

4. The arm stopper according to claim 1 or 2; a door having a recess formed on an upper end surface into which the guide rail is embedded and a notch formed into which a tool for engaging the fastening member is inserted; a frame to which the tip of the arm is rotatably connected via a bracket.

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