Sash roller unit

Abstract

To provide a sash roller unit that can more easily or more quickly remove a support component that rotatably supports a sash roller from a fixing component.SOLUTION: A gap G is secured between a support wall part 223 and an end surface 311a (opposing surface). When an intermediate part 500c of a rod-shaped tool 500 is brought into contact with an end part 223f (extending end part), the gap G becomes such a gap in which the rod-shaped tool 500 is inclined with respect to an extending direction of the support wall portion, and a tip portion 500b can abut against the end surface 311a at a position closer to a top wall 211 than an abutment position of the end part 223f of the intermediate part 500c. With this configuration, operators can more easily or more quickly remove a support component 300 from a fixing component 200 by using the rod-shaped tool 500.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a roller unit. [Background technology]

[0002] Conventionally, a roller unit that is attached to the bottom frame of a shoji screen to enable the screen to slide smoothly has been known in fittings (see, for example, Patent Document 1). The roller unit of Patent Document 1 has a fixed part that is attached to the bottom frame, and a support part that is attached to the fixed part and supports the roller so that it can rotate. The roller unit has a height adjustment mechanism that can adjust the height of the support part relative to the fixed part. In addition, the support part is detachably attached to the fixed part. This makes it possible to replace the support part or perform maintenance. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-82150 Summary of the Invention [Problem to be solved by the invention]

[0004] In this type of door roller unit, it is undesirable that it takes time and effort to remove the support part from the fixed part.

[0005] In view of the above-mentioned situation, one of the objects of the present invention is to provide a door roller unit that allows the support part that rotatably supports the door roller to be more easily or quickly removed from the fixed part fixed to the bottom frame. [Means for solving the problem]

[0006] The door roller unit of the present invention is a door roller unit comprising a fixed part attached to the bottom frame of a shoji screen, and a support part attached to the fixed part and supporting the door roller so that the door roller can rotate, the door roller unit comprising an engagement part that engages the fixed part with the support part, the fixed part having a top wall extending along the longitudinal direction of the bottom frame, and a support wall part extending from one end of the top wall in a direction perpendicular to the longitudinal direction, the support part being accommodated in a space surrounded by the top wall and the support wall part, and the support wall part being engaged with the fixed part. and when the support part and the fixed part are engaged via the engagement portion, a gap is secured between the support wall part and the opposing surface, and when an intermediate portion of a rod-shaped tool for releasing the engagement is abutted against the extending end portion of the support wall part, the rod-shaped tool assumes an inclined position with respect to the extending direction of the support wall part, and the tip end of the rod-shaped tool can abut against the opposing surface at a position closer to the ceiling wall than the abutment position of the extending end portion of the intermediate portion. Effect of the Invention

[0007] In the door roller unit of the present invention, a gap into which a rod-shaped tool can be inserted is provided between the support wall and the opposing surface. In this gap, when the middle part of the rod-shaped tool is brought into contact with the fixed part, the rod-shaped tool assumes an inclined position with respect to the extending direction of the support wall, and the tip part can contact the opposing surface at a position closer to the top wall than the abutment position with the extending end part of the middle part. Thus, by operating the rod-shaped tool with the middle part in contact with the fixed part, the worker can move the tip part, and therefore the support part, in a direction away from the top wall to release the engagement of the engagement part. According to the present invention, it is possible to more easily or more quickly remove the support part from the fixed part. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a door roller unit according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded perspective view of the door roller unit shown in FIG. [Diagram 3]2 is a perspective view of an end part included in a fixing part of the door roller unit shown in FIG. 1. [Figure 4] FIG. 2 is a side view of the door roller unit shown in FIG. [Diagram 5] 2 is a side view of a door roller included in the door roller unit shown in FIG. 1. [Figure 6] FIG. 2 is a side view of the door roller unit shown in FIG. 1, showing a state in which the support part is at the position closest to the top wall of the fixed part (the highest position). [Figure 7] FIG. 2 is a side view of the door roller unit shown in FIG. 1, illustrating a state in which the support part is at the farthest position (lowest position) from the top wall of the fixed part. [Figure 8] 2 is an exploded side view of the door roller unit shown in FIG. 1, showing a state in which a fixed part and a support part are separated. FIG. [Figure 9] 2 is a side view of the door roller unit shown in FIG. 1, showing a state in which the support part is hooked onto the fixed part when the support part is attached to the fixed part. FIG. [Figure 10] 2 is a side view of the door roller unit shown in FIG. 1, illustrating a state before an engaging portion of the support part climbs over an engaging portion of the fixed part when the support part is attached to the fixed part. FIG. [Figure 11] 1, showing a state in which a tool is inserted into a gap between the fixed part and the support part when removing the support part from the fixed part. FIG. [Figure 12] 1, illustrating a state before an engaging portion of the support part climbs over an engaging portion of the fixed part when removing the support part from the fixed part. FIG. [Figure 13] 1, showing a state in which an engaging portion of the support part has climbed over an engaging portion of the fixed part when the support part is removed from the fixed part. FIG. [Figure 14] FIG. 11 is a side view of a portion of a roller unit that is a modified example of an embodiment of the present invention, illustrating a state in which a tool is inserted into the gap between the fixed part and the support part when removing the support part from the fixed part. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A preferred embodiment of the roller unit according to the present invention will be described in detail below with reference to the attached drawings. For the sake of convenience, the directions shown in the following description and in the drawings refer to the directions when a sliding screen equipped with the roller unit is attached to a fixture. The support member of the roller unit can be attached to and detached from the fixed member when the fixed member is attached to the bottom frame, or when the fixed member is removed from the bottom frame. In the following description, the inside and outside of the room are defined as shown in FIG. 1, but the inside and outside of the room can be reversed. The left-right direction refers to the left-right direction when viewed from the outside of the room. The left-right direction is the longitudinal direction of the bottom frame. In the following description, the mirror image relationship refers to a positional relationship that is symmetrical with respect to a plane (symmetric plane) that intersects with the indoor and outdoor directions.

[0010] 1 to 5 show a door roller unit 100 according to an embodiment of the present invention. As shown in FIG. 1, the door roller unit 100 comprises a fixed part 200, a support part 300, and a door roller 320. The fixed part 200 is attached to the bottom frame 10 of a door screen (see FIG. 4). The support part 300 supports the door roller 320 so that it can rotate. With the door roller unit 100 attached to the bottom frame, the door roller 320 can roll in the left-right direction, i.e., along the bottom frame of the door fixture. This allows the door screen to slide smoothly along the bottom frame of the door fixture.

[0011] The roller unit 100 includes a height adjustment mechanism that can change the vertical position (height position) of the support part 300 relative to the fixed part 200. The height adjustment mechanism will be described later. The roller unit 100 is configured so that the support part 300 can be attached to and detached from the fixed part 200. The configuration that allows the support part 300 to be attached to and detached from the fixed part 200 will also be described later.

[0012] (Fixed parts) As shown in Figs. 1 and 2, the fixing part 200 is formed by integrating the cover part 210 and the end part 220 with a fastener 240. The cover part 210 has a top wall 211 and two side walls 212. The top wall 211 is located at the upper end of the cover part 210, intersects with the up-down direction, and has a substantially rectangular and plate-like shape. The two side walls 212 extend downward from the outdoor side and indoor side ends of the top wall 211, respectively. The two side walls 212 intersect with the indoor-outdoor direction, and have a substantially rectangular and plate-like shape. These two side walls 212 are disposed substantially parallel to each other. The two side walls 212 have a mirror image relationship. With this configuration, the cover part 210 has a U-shaped groove portion that extends in the left-right direction with an inverted U-shaped cross section that is open downward. The lower end of the U-shaped groove portion and both left-right ends of the U-shaped groove portion are open.

[0013] 2, the end part 220 is located at one end in the left-right direction of the fixed part 200 (the left end in the example of FIG. 2). The end part 220 is integrated with the cover part 210 in a state in which the end part 220 closes one end in the longitudinal direction of the U-shaped groove part of the cover part 210. The end part 220 has a frame portion 221, a block portion 222, and a support wall portion 223.

[0014] As shown in Fig. 3, the frame portion 221 forms a space surrounded by a middle wall 221a, a top wall 221b, an end wall 221c, and a side wall 221d. As shown in Fig. 2, a height adjustment screw 250 is housed in the space. The height adjustment screw 250 will be described later. The end wall 221c is located at one end in the left-right direction of the end part 220 (the left end in the example of Fig. 3), and intersects with the left-right direction. In addition, the end wall 221c is provided with a substantially U-shaped notch 220a that is open to the outside or inside of the room (the outside of the room in the example of Fig. 3).

[0015] The block portion 222 is a block-shaped portion adjacent to the lower side of the frame portion 221. The block portion 222 is provided with recesses and slits, and is designed to be lightweight while ensuring the required rigidity and strength.

[0016] The support wall portion 223 is adjacent to the right of the frame portion 221 and the block portion 222. The support wall portion 223 is located at the end opposite to the end wall 221c in the left-right direction (the right end in the example of FIG. 3). As shown in FIG. 3, the support wall portion 223 has a middle wall 223a, a top wall 223b, an end wall 223c, and a protruding wall 223d. The end wall 223c is located at the right end of the support wall portion 223. The end wall 223c intersects with the left-right direction, has a substantially rectangular and plate-like shape, and extends in the up-down direction with a predetermined width in the indoor-outdoor direction. In addition, the end wall 223c is provided with a substantially U-shaped notch 220b that is open to the outdoor side or the indoor side (the indoor side in the example of FIG. 3). The support wall portion 223 has a storage portion 223e surrounded by the middle wall 223a, the top wall 223b, the end wall 223c, the right end of the middle wall 221a, and the right end of the top wall 221b. The nut 230 has a substantially square and plate-like shape, and intersects with the left-right direction when stored in the storage portion 223e. The nut 230 has a female thread portion 230a extending in the left-right direction. As shown in FIG. 2, the female thread portion 230a meshes with the male thread portion 250a of the height adjustment screw 250. As shown in FIG. 3, the protruding wall 223d protrudes downward from the middle portion of the middle wall 223a in the indoor / outdoor direction and protrudes rightward from the block portion 222. That is, the protruding wall 223d is adjacent to the lower side of the middle wall 223a and adjacent to the right side of the block portion 222. The protruding wall 223d is located midway in the indoor / outdoor direction of the end piece 220, and intersects with the indoor / outdoor direction. In addition, a lower and right end 223f of the protruding wall 223d is chamfered. The end 223f extends in a direction inclined with respect to the up-down and left-right directions. More specifically, the end 223f extends to the right as it moves upward, that is, so as to approach the top wall 211 as it approaches the end face 311a. The end 223f is an example of an end in the direction extending downward from the middle wall 223a of the support wall portion 223, that is, an extended end.

[0017] As shown in Figs. 1 and 2, the end part 220 is integrated with the cover part 210 in a state where it is partially inserted into the left end of the U-shaped groove of the cover part 210. As shown in Figs. 1 to 3, in the integrated state, the left end of the frame part 221 and the left end of the block part 222 of the end part 220 are exposed from the cover part 210. The other parts are accommodated in the U-shaped groove. As shown in Figs. 2 and 3, the block part 222 is provided with a semi-cylindrical concave surface 220c that opens downward and extends in the indoor / outdoor direction. Also, as shown in Figs. 1 and 2, the two side walls 212 are provided with through holes 210a that penetrate the indoor / outdoor direction and are aligned with each other in the indoor / outdoor direction. When the end part 220 is partially inserted into the left end of the U-shaped groove of the cover part 210, the concave surface 220c and the two through holes 210a are configured to overlap in the indoor / outdoor direction. Here, the concave curved surface 220c has a shape that is approximately along the outer peripheral surface 240a of the fastener 240. The fastener 240 is fixed to the two side walls 212 by being crimped while passing through the through holes 210a of the two side walls 212. This creates an engagement state between the concave curved surface 222c and the fastener 240 housed in the concave curved surface 222c in the up-down direction and the left-right direction, and limits the relative movement of the end part 220 with respect to the cover part 210 in the left-right direction and the up-down direction. That is, the cover part 210 and the end part 220 are fixed by the fastener 240. Note that the manner of joining the cover part 210 and the end part 220 is not limited to this example.

[0018] 4, when the cover part 210 and the end part 220 are integrated, the top wall 211 of the cover part 210 extends in the left-right direction, and the support wall portion 223 of the end part 220 extends downward from the left end (one end in the left-right direction) of the top wall 211. In this case, downward is the direction away from the top wall 211, and is the extension direction of the support wall portion 223 from the top wall 211. In addition, in the fixed part 200, a space S is formed that is surrounded by the top wall 211 and the two side walls 212 of the cover part 210, and the support wall portion 223 of the end part 220, and the support part 300 is accommodated in the space S.

[0019] (Support parts) As shown in FIG. 2, the support part 300 has a support member 310. The support member 310 rotatably supports the door roller 320. The support member 310 has an end wall 311, two side walls 312, and a top wall 313. The end wall 311 is located at the left end of the support part 300, and faces the support wall portion 223 (end wall 223c) of the fixed part 200 in the left-right direction when housed in the space S. The end wall 311 intersects with the left-right direction, has a substantially rectangular and plate-like shape, and extends in the up-down direction with a predetermined width in the indoor-outdoor direction. The two side walls 312 each intersect with the indoor-outdoor direction, and have a substantially rectangular and plate-like shape. The two side walls 312 each extend in the left-right direction with a predetermined width in the up-down direction from the outdoor side and indoor side ends of the end wall 311. The two side walls 312 have a mirror image relationship. In addition, when the support part 300 is accommodated in the space S, the side walls 312 are configured to overlap the side walls 212 of the fixed part 200 in the indoor / outdoor direction while being in close proximity to each other. The distance between the two side walls 312 in the indoor / outdoor direction is narrower than the distance between the two side walls 212 in the indoor / outdoor direction. That is, the two side walls 312 of the support part 300 are located inside the two side walls 212 of the fixed part 200. On the outdoor side, the side walls 312 of the support part 300 are adjacent to the indoor side of the side walls 212 of the fixed part 200. On the other hand, on the indoor side, the side walls 312 of the support part 300 are adjacent to the outdoor side of the side walls 212 of the fixed part 200. The top wall 313 has a substantially rectangular and plate-like shape that intersects with the up-down direction and extends between the upper parts of the two side walls 312. The two door rollers 320 are housed between the two side walls 312 and rotatably supported by the support member 310 via a shaft (not shown). The two door rollers 320 are arranged side by side with a gap between them in the left-right direction. As shown in FIG. 5, each door roller 320 has an inner wheel 321, an outer wheel 322, and a bearing 323 that rotatably supports the outer wheel 322 relative to the inner wheel 321. The door roller 320 can rotate more smoothly by having the bearing 323 interposed between the inner wheel 321 and the outer wheel 322, and can therefore roll more smoothly in the left-right direction along the bottom frame of the fitting.

[0020] (Guide mechanism and height adjustment) The roller unit 100 is provided with a height adjustment mechanism that can change the vertical position (height position) of the support part 300 relative to the fixed part 200. The height adjustment mechanism includes a guide mechanism 400 and a height adjustment screw 250 as shown in FIGS.

[0021] The guide mechanism 400 guides the support part 300 to be movable in a direction D1 relative to the fixed part 200. The direction D1 is a direction that crosses the up-down direction and the left-right direction at an angle. By being guided by the guide mechanism 400, the support part 300 can move away from the top wall 211 as it moves away from the support wall part 223 of the fixed part 200. In other words, the support part 300 can move closer to the top wall 211 as it moves closer to the support wall part 223 of the fixed part 200. The guide mechanism 400 is provided on each of the side walls 212, 312 on the indoor side and the side walls 212, 312 on the outdoor side. The guide mechanism 400 is composed of protrusions 411, 412 provided on the side wall 212 of the fixed part 200 and guide parts 421, 422 provided on the side wall 312 of the support part 300 adjacent to the side wall 212. The guide mechanism 400 provided on the side walls 212, 312 on the indoor side and the guide mechanism 400 provided on the side walls 212, 312 on the outdoor side are in a mirror image relationship. The protrusions 411, 412 protrude from each of the side walls 212 toward the other side wall 212 along the indoor / outdoor direction. In other words, the protrusions 411, 412 protrude so as to overhang toward the adjacent side wall 312. In addition, on each of the side walls 212, the protrusions 411, 412 are arranged at intervals in the left-right direction. The protrusion 411 is located farther from the end wall 221c than the protrusion 412. The guide portion 421 guides the protrusion 411 in the direction D1. The guide portion 421 is an edge formed on each of the side walls 312 and extending in the direction D1. The guide portion 421 constitutes the left-right end of the side wall 312, in this case the end opposite to the end wall 311. The guide portion 422 guides the protrusion 412 in the direction D1. The guide portion 422 is a slit formed in each of the side walls 312 and extending in the direction D1. The guide portion 422 is cut from the upper edge of the side wall 312 and extends substantially along the direction D1 with a substantially constant width to a middle position in the up-down direction of the side wall 312. The guide portion 422 restricts the movement of the protrusion 412 in a direction intersecting with the direction D1, and guides the protrusion 412 in the direction D1. The protrusions 411, 412 are configured to sandwich the area of ​​the side wall 312 between the guide portions 421, 422.With this configuration, the support part 300 can move in parallel (translation) in the direction D1 while maintaining a posture approximately aligned in the left-right direction, that is, while maintaining the posture shown in FIGS.

[0022] The guide mechanism 400 guides the support part 300 to be movable relative to the fixed part 200 between an upper position P1 shown in FIG. 6 and a lower position P2 shown in FIG. 7. The upper position P1 of the support part 300 is determined by the restriction of the relative movement of the lower end 422a of the guide part 422 in the direction D1 (diagonally upward movement in FIG. 6) by the protrusion 412, or the restriction of the relative movement of the upper end 312a of the side wall 312 (diagonally upward movement in FIG. 6) by the top wall 211. The lower position P2 of the support part 300 is determined by the restriction of the relative movement of the protrusion 423 in the direction D1 (diagonally downward movement in FIG. 7) by the protrusion 411. The protrusion 423 protrudes diagonally upward in FIG. 7 from the upper end of the guide part 421.

[0023] Here, in this embodiment, as shown in FIG. 4, the worker rotates the height adjustment screw 250 engaged with the nut 230 around the axis Ax so that the tip 250b of the height adjustment screw 250 protrudes from the support wall 223 into the space S, that is, toward the support part 300. When the shoji screen equipped with the door roller unit 100 is attached to the fixture, the support part 300 is pushed upward from the bottom frame of the fixture relatively to the fixed part 200. Accordingly, the end wall 311 of the support part 300 guided in the direction D1 by the guide mechanism 400 approaches the support wall 223 of the fixed part 200, and the end face 311a located at the left end of the end wall 311 stops at a position where it abuts against the tip 250b of the height adjustment screw 250. That is, as shown in FIG. 4, when the end face 311a and the tip 250b are in contact with each other, the relative position Ps of the support part 300 with respect to the fixed part 200 is determined. That is, the worker can variably set the relative position Ps of the support part 300 in the direction D1 with respect to the fixed part 200 by rotating the height adjustment screw 250 around the axis Ax and adjusting the left-right position of the tip 250b. Here, the relative position in the up-down direction, that is, the height position, also changes with the change in the relative position of the support part 300 in the direction D1 with respect to the fixed part 200. Therefore, the height position of the support part 300 can be adjusted by setting the left-right position of the height adjustment screw 250. The height adjustment screw 250 can be rotated using a tool such as a screwdriver that penetrates the notch 220a. The end face 311a faces the support wall part 223 of the end part 220. The end face 311a is an example of an opposing surface.

[0024] (Attaching the support part to the fixed part) 8 to 10 and 7 show the process of mounting the support part 300 to the fixed part 200. The support part 300 is inserted into the space S of the fixed part 200 from the separated state shown in FIG. 8. As shown in FIG. 9, the worker hooks the protrusion 423 of the support part 300 to the protrusion 411 of the fixed part 200 in a posture in which the protrusion 424 and the end wall 311 of the support part 300 are separated from the top wall 211 of the fixed part 200. Next, in a state in which the protrusion 423 is hooked to the protrusion 411, the worker rotates the support part 300 relative to the fixed part 200 so that the protrusion 424 and the end wall 311 approach the top wall 211. At this time, the protrusion 411 becomes a fulcrum for the rotation of the support part 300. If the rotation continues, the protrusion 424 interferes with the protrusion 412. As shown in Fig. 10, the worker further applies force F in a direction in which protrusion 424 and end wall 311 approach top wall 211. This causes support part 300 to rotate further, and protrusion 424 overcomes protrusion 412 with elastic deformation in the indoor / outdoor direction, resulting in the attached state shown in Fig. 7. When engagement is complete and protrusion 424 and protrusion 412 are engaged, i.e., when attachment is complete, support part 300 is located at lower position P2, and gap G between support wall portion 223 and end face 311a is at its widest in the left-right direction. Protrusion 424 and protrusion 412 are an example of an engagement portion.

[0025] (Removing the support part from the fixed part) 11 to 13 show a process of removing the support part 300 from the fixed part 200. In removing the support part 300, the support part 300 may be moved relative to the fixed part 200 in the reverse direction of the above-mentioned mounting path. For this purpose, a force in a direction away from the top wall 211 may be applied to a portion of the support part 300 close to the support wall part 223 (end part 220), that is, the protrusion 424 or the end wall 311. However, as described above, the support part 300 is accommodated in the space S surrounded by the top wall 211 and the two side walls 212 of the cover part 210, and the support wall part 223 of the end part 220. For this reason, it is difficult for an operator to directly apply a force to the protrusion 424 or the end wall 311 in a direction away from the top wall 211. Therefore, the door roller unit 100 of this embodiment is configured so that an operator can remove the support part 300 from the fixed part 200 using a rod-shaped tool 500. The rod-shaped tool 500 is, for example, a flat-head screwdriver, and has a grip portion 500a as a base portion and a tip portion 500b. The portion between the grip portion 500a and the tip portion 500b is referred to as a middle portion 500c. The grip portion 500a may also be referred to as a base portion or an operating portion.

[0026] First, as shown in FIG. 11, the worker positions the support part 300 at the lower position P2 with respect to the fixed part 200. In this state, the gap G between the support wall part 223 and the end face 311a is widest in the left-right direction. The worker inserts the tip part 500b of the rod-shaped tool 500 into the gap G, and brings the middle part 500c into contact with the lower end part 223f of the support wall part 223 of the fixed part 200, and brings the tip part 500b into contact with the end face 311a of the support part 300. Here, as described above, in this embodiment, the end part 223f is chamfered and extends so as to approach the top wall 211 as it approaches the end face 311a. Therefore, the worker can insert the rod-shaped tool 500 in a state in which the position where the tip part 500b abuts against the end face 311a is closer to the top wall 211 than the end part 223f with which the middle part 500c abuts. In this case, the rod-shaped tool 500 is in a position extending from the grip portion 500a toward the tip portion 500b at an angle with respect to the left-right direction.

[0027] Next, as shown in Figs. 12 and 13, while maintaining the state in which the intermediate portion 500c abuts against the end portion 223f and the tip portion 500b abuts against the abutment position of the end surface 311a, the worker moves the grip portion 500a upward, i.e., in a direction approaching the top wall 211. Accordingly, the tip portion 500b moves downward, i.e., in a direction away from the top wall 211, and the end wall 311 with which the tip portion 500b abuts moves in a direction away from the top wall 211. Then, the protrusion 424 of the support part 300 moves in a direction away from the top wall 211 while undergoing elastic deformation in the indoor / outdoor direction, and overcomes the protrusion 412, and the engagement state between the protrusion 412 and the protrusion 424 is released. This allows the worker to remove the support part 300 from the fixed part 200.

[0028] In the removal using the rod-shaped tool 500 described above, the worker uses the rod-shaped tool 500 as a so-called "lever" in which the gripping part 500a is the force point, the middle part 500c in contact with the end part 223f is the fulcrum, and the tip part 500b in contact with the end face 311a is the point of application. As shown in Figs. 11 to 13, in this embodiment, the distance from the middle part 500c as the fulcrum to the gripping part 500a as the force point can be longer than the distance from the middle part 500c as the fulcrum to the tip part 500b as the point of application. That is, according to this embodiment, the lever ratio in the principle of the "lever" can be made longer, so that the worker can use the rod-shaped tool 500 to remove the supporting part 300 from the fixed part 200 more easily with a relatively small force.

[0029] The door roller unit 100 of this embodiment is configured so that the engagement of the support part 300 with the fixed part 200 can be released by moving the end wall 311 of the support part 300 in a direction away from the top wall 211 of the fixed part 200. In order to remove the support part 300 using the rod-shaped tool 500 in this configuration, it is necessary to form a gap G into which the rod-shaped tool 500 can be inserted in the inclined posture shown in Fig. 11 and in contact with each part. This allows the tip part 500b and therefore the end wall 311 to be moved in a direction away from the top wall 211 to release the engagement between the protrusion 412 and the protrusion 424.

[0030] In this embodiment, a required gap G is secured between the support wall portion 223 and the end face 311a (opposing surface) in a state in which the support part 300 and the fixed part 200 are engaged with each other via the protrusions 412 and 424 (engagement parts). The gap G allows the tip part 500b to come into contact with the end face 311a in a position inclined with respect to the left and right direction (hereinafter referred to as the inclined position) in a state in which the tip part 500b is closer to the top wall 211 than the intermediate part 500c when the intermediate part 500c of the rod-shaped tool 500 is brought into contact with the end face 311a. By placing the rod-shaped tool 500 in the inclined position in the gap G, the worker can more easily or more quickly remove the support part 300 from the fixed part 200 by using the rod-shaped tool 500 through the process shown in Figs. 11 to 13.

[0031] 11, the end face 311a is provided with a protrusion 311c that protrudes from the flat portion 311b so as to approach the support wall portion 223, and thus an upwardly facing support surface 311d is provided between the top surface of the protrusion 311c and the flat portion 311b above it. The support surface 311d can support the tip portion 500b of the rod-shaped tool 500, and is an example of a hook portion that hooks the tip portion 500b. With this configuration, the support surface 311d can prevent the tip portion 500b from coming off the end face 311a, so that the worker can more reliably remove the rod-shaped tool 500.

[0032] 14, a recess 311e recessed away from the support wall 223 may be provided in the flat surface 311b, whereby an upwardly facing support surface 311d may be provided between the bottom surface of the recess 311e and the flat surface 311b below it. In this case as well, the tip 500b can be hooked on the support surface 311d, and the same effect as when the protrusion 311c is provided on the end surface 311a can be obtained.

[0033] In the example of FIG. 14, the end 223f is not chamfered and extends in the left-right direction above the lower end of the end wall 311. In this case, the rod-shaped tool 500 can be inserted into the gap G in a state where the position where the tip portion 500b abuts on the end face 311a is closer to the top wall 211 than the end 223f where the middle portion 500c abuts. The gap G is not limited to the examples of FIG. 11 and FIG. 14, and it is sufficient that the rod-shaped tool 500 can be inserted in a state where the position where the tip portion 500b abuts on the end face 311a is closer to the top wall 211 than the end 223f where the middle portion 500c abuts. That is, it is sufficient that the support wall portion 223, the end portion 223f, the end wall 311, and the flat portion 311b have shapes and arrangements that allow such a gap G to be formed.

[0034] 11 and 3, the end 223f of the support wall portion 223 is an inclined surface inclined in the left-right direction so as to approach the top wall 211 toward the end face 311a. With this configuration, the gap G in which the rod-shaped tool 500 can be disposed in the inclined position can be realized with a relatively simple configuration.

[0035] In addition, when the engagement by the protrusion 412 and the protrusion 424 (engagement portion) is released, the support part 300 falls off from the fixed part 200. Therefore, the heavier the support part 300 is, the more it is necessary to increase the engagement force by the engagement portion, for example by protruding the protrusion 412 higher. When the engagement force at the engagement portion increases, the engagement at the engagement portion becomes more difficult to release. In this respect, according to the configuration of this embodiment, even when the engagement force needs to be increased, the support part 300 can be removed from the fixed part 200 more easily or quickly with a relatively small force using the rod-shaped tool 500. That is, the configuration of this embodiment is effective when the support part 300 becomes heavier and the engagement force by the engagement portion needs to be increased, such as when the support part 300 has a plurality of door rollers 320 or when each door roller 320 has a bearing 323. In other words, according to this embodiment, it becomes easier to adopt a support part 300 having a configuration that is likely to be heavier, such as a configuration in which the support part 300 has multiple rollers 320 or a configuration in which each roller 320 has a bearing 323, in the roller unit 100.

[0036] Although the preferred embodiment of the present invention has been described above, the above embodiment is merely an example, and the present invention can be realized through various modifications and substitutions. For example, the number of door rollers and the shape and dimensions of each part can be set in various ways.

[0037] In the door roller unit of the present invention, a hook portion for hooking the tip portion may be provided on the opposing surface. According to the present invention, the tip end of the rod-shaped tool can be prevented from coming off the opposing surface, so that removal of a supported part by the rod-shaped tool can be more reliably performed.

[0038] In the door roller unit of the present invention, an inclined surface may be formed on the extending end of the support wall portion, the inclined surface being inclined with respect to the extending direction so as to approach the top wall as it approaches the opposing surface. According to the present invention, a gap that allows a rod-shaped tool to be disposed in a required inclined position can be realized relatively easily.

[0039] In the door roller unit of the present invention, the support component may have a plurality of door rollers. According to the present invention, even if the weight of the support part increases due to the presence of multiple door rollers, and the engagement force of the engagement part must be increased accordingly, the support part can be more easily or quickly removed from the fixed part with a relatively small force using a rod-shaped tool. In other words, by adopting the configuration of the present invention, it becomes easier to adopt a configuration in which the door roller unit has multiple door rollers.

[0040] In the door roller unit of the present invention, the door roller may have an inner ring, an outer ring, and a bearing that supports the outer ring rotatably relative to the inner ring. According to the present invention, even if the weight of the support part increases due to the door roller having an inner ring, an outer ring, and a bearing, and the engagement force of the engagement part must be increased accordingly, the support part can be more easily or quickly removed from the fixed part using a rod-shaped tool with a relatively small force. In other words, by adopting the configuration of the present invention, it becomes easier to adopt a configuration in which the door roller has an inner ring, an outer ring, and a bearing. [Explanation of symbols]

[0041] 100 roller unit, 200 fixed part, 211 top wall, 223 support wall portion, 223f end portion (inclined surface), 300 support part, 400 guide mechanism, 412 protrusion (engagement portion), 424 protrusion (engagement portion) 311a end surface (opposing surface), 311d support surface (hook portion), 320 roller, 321 inner ring, 322 outer ring, 323 bearing, 500 rod-shaped tool, 500b tip portion, 500c intermediate portion, G gap, S space.

Claims

1. A door roller unit comprising a fixed part attached to a bottom frame of a door screen and a support part attached to the fixed part and rotatably supporting the door roller, an engaging portion that engages the fixed component and the support component; The fixing part has a top wall extending along a longitudinal direction of the lower frame and a support wall portion extending from one end of the top wall in a direction perpendicular to the longitudinal direction, the support component is accommodated in a space surrounded by the top wall and the support wall portion, and has an opposing surface facing the support wall portion, When the support part and the fixed part are engaged with each other via the engagement portion, a gap is secured between the support wall part and the opposing surface, The gap is a gap such that when the intermediate portion of a rod-shaped tool for releasing the engagement is abutted against the extending end portion of the support wall portion, the rod-shaped tool is inclined with respect to the extending direction of the support wall portion, and the tip portion of the rod-shaped tool is able to abut against the opposing surface at a position closer to the ceiling wall than the abutment position of the intermediate portion with the extending end portion of the door roller unit.

2. The roller unit according to claim 1 , wherein the opposing surface is provided with a hook portion for hooking the tip portion.

3. The roller unit according to claim 1 , wherein an inclined surface is formed on the extending end of the support wall portion, the inclined surface being inclined with respect to the extending direction so as to approach the top wall as it approaches the facing surface.

4. The roller unit according to claim 1 , wherein the support component has a plurality of rollers.

5. The door roller unit according to any one of claims 1 to 4, wherein the door roller has an inner ring, an outer ring, and a bearing that supports the outer ring rotatably relative to the inner ring.

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