JP2008138500A - Door mounting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door-mounting fixture having improved strength and durability, wherein a position of the door can easily be adjusted. <P>SOLUTION: The invention is composed of a door-supporting member 30 formed integrally of aluminum for pivotally supporting the door, a slide part 24 provided on the door-supporting member 30 and a case body 16 into which the slide part 24 is inserted. Furthermore, the invention includes a slide-receiving part 12 provided in the case body 16 and slidably holding the slide part 24, an oval-shaped locking hole 20 formed in the slide-receiving part 12 and an uneven-shaped engaging part 22 formed on an inner side of the slide-receiving part 12 facing to the slide part 24 and linearly located. On a side face of the slide part 24 facing to the engaging part 22, a curved engaging part 32 formed in a round face opposing to the engaging part 22 and also having an evenness on the surface for engaging the un-evenness of the engaging part 22 is provided. The both sides of the top parts of the round face of the curved engaging part 32 have a pair of insertion holes, into which a pair of adjusting bolts 42 are inserted through the locking hole 20, so as to fix the slide part 24 with a nut. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a door mounting bracket that enables position adjustment when mounting a door such as a gate or the like, and when some mounting position error or other positioning is necessary.

  2. Description of the Related Art Conventionally, a door mounting bracket for attaching a door to a gate pole is provided with a pair of a support bracket provided with a support portion that supports the door and a receiving bracket that can be fitted with the support portion. And in order to attach a door to a gate pillar, a metal fitting is attached to the side of a gate pole, and the support part of the metal fitting fixed to the door and a metal fitting are fitted, and the door is attached so that opening and closing is possible.

Further, as disclosed in Patent Document 1, as a door mounting bracket whose position can be adjusted, a mounting plate is fixed to a predetermined position of a gate pole by screwing or the like, and a mounting plate is fixed to a predetermined position of the door. A door mounting bracket is disclosed in which a support shaft of a mounting plate and a receiving hole of a mounting plate are fitted to each other and a door mounting plate is mounted on the mounting plate. The mounting plate is composed of a mounting plate body and a base plate. For position adjustment, with the mounting plate body in contact with the ridge formed on the base plate, loosen the screws that fix the mounting plate body and adjust the mounting plate so that it can move in the direction of the long hole, Further, the mounting plate body is tilted in a desired direction around the protrusion on the base plate. Thereby, the position of the receiving hole of the mounting plate can be adjusted so as to be optimized.
Utility Model Registration No. 3014947

  In the above-mentioned conventional technology, aluminum with high dimensional accuracy produced at the factory is installed in a state where the bracket is attached to the gate pole, the support portion of the support bracket fixed to the door is fitted to the bracket, and the door is attached to the gate pole. Even the gate poles and doors made of metal could cause an error in the inclination due to construction on site and the distance between the doors. Therefore, the bolt insertion hole can be finely adjusted, for example, so that the positions of the support fitting for the gate door and the receiving bracket for the gate post can be adjusted. However, it is not possible to make sufficient adjustments for positional deviations such as front, back, left and right, and there is an unnecessary gap between both doors, or the free end of the door abuts against the other door or gate pillar and interferes. There was a thing.

  Further, in the gate door mounting bracket disclosed in Patent Document 1, the position is adjusted by the protrusion formed on the base plate attached to the gate post and the uneven portion formed on the inner surface of the mounting plate body, and both sides of the protrusion are adjusted. Screws are inserted into the through holes and fixed. And the load of the door is received with this screw. Therefore, the weight of the door and the load when opening and closing are concentrated on the screw, and the durability is low. Further, during the adjustment work, the load applied to the screw makes it difficult to turn the screw and the adjustment work is troublesome.

  The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a door mounting bracket that can easily adjust the position of the door and has high strength and durability.

  This invention is a door support member that is integrally formed by aluminum die casting and pivotally supports the door, a slide portion provided on the door support member, an aluminum die cast case body into which the slide portion is inserted, A slide receiving portion provided in the case body for slidably holding the slide portion; a locking hole formed in the slide receiving portion; and the locking hole on the inner surface of the slide receiving portion facing the slide portion Is formed on the R surface which is formed on the straight line and is formed on the straight line, and is one side surface of the slide portion facing the locking portion and swells toward the locking portion. And a curved engagement portion provided on the surface with irregularities that engage with the irregularities of the locking portion, and the R surface of the curved engagement portion has a radius of curvature R that is relatively longer than the length of the curved engagement portion. This curved engagement is formed on the surface A pair of insertion holes are formed on both sides of the top of the R surface of the joint, and an adjustment bolt penetrated through each of the insertion holes of the slide part, and screwed into the tip of the adjustment bolt, the engagement of the slide receiving part The door mounting bracket includes a nut that abuts the stopper and the curved engagement portion of the slide portion, and is capable of adjusting and fixing the position of the door support member by tightening the adjustment bolt.

  In the present invention, a groove is formed in the inner wall surface of the slide receiving portion in the insertion direction of the slide portion, and a bolt shaft support portion is provided on the side surface opposite to the side surface from which the slide portion extends. The positioning bolt is engaged with the head of the positioning bolt to form a curved threaded portion that is a semi-arc-shaped female screw portion that is curved and positioned at the curved engaging portion along the insertion direction of the slide portion. With the male screw portion of the bolt abutting on the groove, the curved screwing portion is screwed with the male screw portion of the positioning bolt, and the positioning bolt is rotated to turn the slide portion into the slide receiving portion. The door mounting bracket is relatively movable.

  Each insertion hole of the slide portion has an inner diameter that gradually decreases from each opening side at both ends toward the center, and a cross-sectional shape in the penetrating direction is formed in a drum shape, on the side surface opposite to the curved engagement portion of the slide portion. Each of the insertion holes has a gently curved convex portion, and an adjustment bolt is inserted into the locking hole and the insertion hole, and the nut or bolt head faces each curved convex portion. The slide part is held so as to be swingable with respect to the slide receiving part.

  The adjustment bolt has a head fitted in a recess formed around the locking hole of the slide receiving portion, and the nut rotates into the recess in which the curved convex portion of the slide portion is formed. It is impossible to fit.

  Alternatively, the adjustment bolt has a head abutting against a curved convex portion of a concave portion formed around the insertion hole of the slide portion, and the nut is provided on a mounting surface on the back side of the slide receiving portion. Is.

  The slide receiving portion includes a hollow insertion portion having a width substantially equal to the width of the slide portion, and holds the slide portion slidably.

  According to the door mounting bracket of the present invention, the number of parts is small, it is made of an aluminum alloy, does not rust, and has high durability. Further, accurate adjustment can be easily performed with a small number of parts. The case body accommodates the slide portion of the door support member and receives the load of the door on the surface of the slide receiving portion, so that the attachment strength is high, and the attachment position of the door can be easily adjusted with two screws.

  Hereinafter, a first embodiment of a door mounting bracket according to the present invention will be described with reference to FIGS. As shown in FIG. 1, the door mounting bracket 10 of this embodiment includes a case body 16 having a hollow slide receiving portion 12 that is a substantially rectangular parallelepiped made of aluminum alloy and made of aluminum alloy. The case body 16 is provided with a pair of attachment pieces 14 that extend from a side edge portion in the longitudinal direction on both sides of one side surface of the slide receiving portion 12 in a direction orthogonal to the longitudinal direction and are flush with each other. It has been. As shown in FIGS. 1 and 2, a plurality of through holes 14 a are formed in the mounting piece 14.

  As shown in FIG. 2 (b), a concave portion 18 that is an oval depression is provided in the center of the front surface of the slide receiving portion 12, and an oval shape is provided at the inner center of the concave portion 18. A locking hole 20 that is a through hole is formed. Further, the back surface of the slide receiving portion 12 is opened, and one end surface in the longitudinal direction is also opened, and a hollow interior is formed as the fitting insertion portion 12a. Further, on the back side of the locking hole 20 on the inner surface of the slide receiving portion 12, as shown in FIGS. 2A and 5, an uneven portion positioned on a straight line along the longitudinal direction of the locking hole 20. A locking portion 22 is formed.

  As shown in the figure, a substantially rectangular parallelepiped slide portion 24 is fitted into the slide receiving portion 12. The slide portion 24 is formed by aluminum die casting using an aluminum alloy, and a columnar shaft support portion 26 is integrally provided at the base end portion in the insertion direction to the slide receiving portion 12. Further, a columnar support shaft 28 made of ceramic, resin, or the like is fixed to the shaft support portion 26 with a bolt or the like (not shown). The slide portion 24, the shaft support portion 26, and the support shaft 28 constitute a door support member 30 that adjusts the door 50 shown in FIG. The side surface of the slide portion 24 that is inserted into the fitting insertion portion 12a of the slide receiving portion 12 that faces the locking hole 20 has a radius of curvature R that is relatively large with respect to the longitudinal length of the side surface of the slide portion 24. And has a shape bulging outward. A curved engagement portion 32 is formed on the substantially entire length of the R surface. The curved engagement portion 32 is provided with unevenness that engages with the unevenness of the locking portion 22 of the slide receiving portion 12. A pair of insertion holes 34 that are through holes are formed on both sides in the longitudinal direction across the apex of the central portion of the bending engagement portion 32. As shown in FIG. 4 (b), the inner surface of the insertion hole 34 is gradually narrowed from the opening sides of both ends toward the center, and the cross-sectional shape of the hole in the penetrating direction is formed in a drum shape.

  On both side surfaces of the slide portion 24 positioned laterally with respect to the curved engagement portion 32, a slide guide portion 36 slightly raised in a substantially rectangular convex shape is slidable in contact with the inner surface of the slide receiving portion 12. Are provided. On the side surface of the slide portion 24 located on the opposite side of the curved engagement portion 32, as shown in FIGS. 3B and 4A, a recess 40 that is hollowed out in the longitudinal direction of the slide portion 24 is formed. Is formed. The recess 40 is fitted with a nut 38 that is screwed into a bolt 42 described later, and is formed to have substantially the same width as the width between the opposing side surfaces. On the bottom surface of the concave portion 40, gentle curved convex portions 40a that are curved in the longitudinal direction of the slide portion 24 with the vicinity of the central axis of each insertion hole 34 as a vertex are formed.

  In each insertion hole 34, two adjustment bolts 42 are respectively inserted into the locking holes 20 of the slide receiving portion 12 through washers. Then, as shown in FIG. 4B, each adjusting bolt 42 is screwed to each nut 38 so that the engaging portion 22 of the slide receiving portion 12 and the concave and convex portions of the curved engaging portion 32 can be fixed in mesh with each other. Match.

  Next, the adjustment method of the door mounting bracket 10 of this embodiment is demonstrated. First, as shown in FIG. 5, the adjustment bolt 42 is loosened to a position where the locking portion 22 and the curved engagement portion 32 do not mesh. Then, the slide part 24 becomes slidable within the fitting insertion part 12a of the slide receiving part 12, and the position of the door support member 30 can be adjusted in the longitudinal direction of the slide receiving part 12. Further, after the alignment of the slide portion 24, the adjustment bolt 42 is tightened to adjust the angle of the slide portion 24 with respect to the slide receiving portion 12. In the adjustment, when one of the adjustment bolts 42 is loosened and one of the bolts is tightened, the curved engaging portion 32 of the slide portion 24 swings toward the locking portion 22 in the tightened direction. This movement is performed when the curved engaging portion 32 is slightly moved along the curved surface to the unevenness of the locking portion 22 of the slide receiving portion 12. Then, the above adjustment is repeated until the position of the door support member 30 reaches a predetermined position, and both adjustment bolts 42 are tightened in that state to complete the adjustment.

  Next, the usage method of the door attachment metal fitting 10 of this embodiment is demonstrated. Here, as shown in FIG. 6, the pair of doors 50 are attached to the pair of gate pillars 52. First, the slide portion 24 is inserted into the slide receiving portion 12 of the case body 16, the adjustment bolt 42 is inserted from the locking hole 20 of the slide receiving portion 12 into the insertion hole 34 of the slide portion 24, and the nut 38 is inserted into the recess 40. Then, the adjustment bolt 42 is tightened appropriately. Thereafter, screws (not shown) are inserted into the mounting holes 14a of the case body 16 at predetermined positions at the upper and lower positions corresponding to the heights of the gate pillar 52 and the door 50 to which the door is attached, respectively, and fixed. Then, the support shafts 28 are fitted to the upper and lower fitting receiving portions 54 provided on the door 50, and the door 50 is attached to the gate pillar 52. As shown in FIG. 6, the pair of doors 50 are attached in the same manner. Subsequently, the adjustment bolt 42 of each door mounting bracket 10 of the pair of doors 50 is adjusted by the above-described method so that the pair of doors 50 are flush with each other at a predetermined height position.

  Since the door mounting bracket 10 of this embodiment is formed by aluminum die casting, it is durable without rusting and does not impair the aesthetics for a long period of time. Further, since the slide portion 24 of the door support member 30 is inserted and supported by the slide receiving portion 12 of the case body 16, the load of the door 50 applied to the door support member 30 is applied from the slide portion 24 to the slide receiver of the case body 16. It is received by the entire inner surface of the portion 12 and has high strength. Therefore, the load of the door 50 is not directly applied to the adjustment bolt 42 and the durability is high. Further, the unevenness of the curved engagement portion 32 of the slide portion 24 is widely engaged with the unevenness of the engagement portion 22 of the slide receiving portion 12 with a large R, and is finely adjusted by the two adjustment bolts 42. It is easy and the force of adjustment is received on a relatively wide surface, so the strength of the adjustment part is also high. Furthermore, the structure allows accurate fine adjustment with a small number of parts, and the cost is low. Further, even when the adjustment bolt 42 is detached from the nut 38 during adjustment, the door 50 does not fall off and the safety is high.

  Next, a second embodiment of the door mounting bracket according to the present invention will be described with reference to FIGS. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. The door mounting bracket 60 of this embodiment also holds the slide portion 24 of the door support member 30 slidably by the hollow insertion portion 12a of the slide receiving portion 12 of the case body 16. A semicircular arc-shaped groove 12b is provided on the inner wall surface of the slide receiving portion 12, and a U-shaped groove that is a bolt shaft supporting portion is formed on the side surface opposite to the side surface on which the slide portion 24 of the door support member 30 extends. Positioning bolts 64 are formed to slide the door support member 30. The positioning bolt 64 is fitted around the U-shaped groove 62 with the flange portion 66 so that it can rotate about the axis relative to the slide receiving portion 12 and does not move in the axial direction. The positioning bolt 64 is located on the side of the adjusting bolt 42 so as to avoid the adjusting bolt 42, and is a curved threaded portion which is a female-circular semicircular groove located on the side of the insertion hole 34 of the curved engagement portion 32 of the slide portion 24. The male threaded portion 64a is screwed to 70. In addition, the surface of the shaft support portion 26 opposite to the curved threaded portion 70 is abutted against the side surface of the gate column or the like in the attached state so that the engagement between the curved threaded portion 70 and the male threaded portion 64a is not released. An abutting protrusion 72 that comes into contact is integrally provided.

  Further, a bearing hole 74 for receiving a support shaft provided on the gate side is formed in the shaft support portion 26 of the door support member 30 of this embodiment instead of the support shaft 28 of the above-described embodiment.

  Next, a method for adjusting the door mounting bracket 60 of this embodiment will be described. First, the adjustment bolt 42 is loosened so that the locking portion 22 and the curved engaging portion 32 do not mesh with each other, and the curved screwed portion 70 and the male screw portion 64a of the positioning bolt 64 are loosened. At this time, since the contact protrusion 72 hits the gate pillar or the like, it does not loosen more than necessary. In this state, the positioning bolt 64 is rotated, and the slide portion 24 is moved within the slide receiving portion 12 and adjusted to a predetermined position. Further, the pair of adjustment bolts 42 are tightened to adjust the angle of the slide portion 24 with respect to the slide receiving portion 12 in the same manner as in the above embodiment.

  The usage method of the door mounting bracket 60 of this embodiment is the same as that of the said embodiment, a door is attached to each door support member 30, and the position of the front and rear, right and left of a door is adjusted with the said adjustment method.

  According to the door mounting bracket 60 of this embodiment, the door support member 30 can be positioned by the positioning bolt 64 in addition to the adjustment bolt 42 in addition to the same effects as in the above embodiment, and the horizontal direction of the door Positioning can be performed more easily, and in particular, fine adjustment can be made precisely in the front-rear and left-right directions. Moreover, the number of parts is such that only the positioning bolts 64 are added to the above embodiment, and the cost is hardly increased.

  Next, a third embodiment of the door mounting bracket according to the present invention will be described with reference to FIGS. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the door mounting bracket 80 of this embodiment, the oblong locking hole 20 of the above embodiment is not provided on the front side of the slide receiving portion 12, and the door support member 30 is slid by the pair of side wall portions 82. Part 24 is received. A semicircular groove 12b is formed on the back surface, which is the mounting surface 12c of the slide receiving portion 12. The mounting surface 12c is formed with an oval locking hole 86 parallel to the groove 12b, and on both sides of the mounting surface 12c is a locking portion made up of a concavo-convex portion linearly along the longitudinal direction of the locking hole 86. 88 is formed. A U-shaped groove 84 that penetrates is formed on the side surface of the slide receiving portion 12 opposite to the surface on which the slide portion 24 of the door support member 30 extends, and is connected to the groove 12b. Positioning bolts 64 for sliding the door support member 30 are attached to the groove 12b and the U-shaped groove 84, as in the above embodiment.

  The sliding portion 24 of the door support member 30 faces the mounting surface 12c side in which the directions of the curved engagement portion 32 and the curved screwing portion 70 are opposite to those in the above embodiment. A locking portion 88 is engaged with the bending engagement portion 32, and a male screw portion 64 a of the positioning bolt 64 is screwed with the bending screwing portion 70.

  A pair of insertion holes 34 are also formed in the slide portion 24 of the door support member 30 of this embodiment, and two adjustment bolts 42 are respectively inserted into the insertion holes 34 through washers (not shown). The adjustment bolt 42 passes through the insertion hole 34 and protrudes from the locking hole 84 on the mounting surface 12 c side of the slide receiving portion 12, and is screwed into a nut (not shown). And the adjusting bolts 42 are fixed. Further, since the slide portion 24 of the door support member 30 is exposed at the slide receiving portion 12, a cover 90 that covers the slide receiving portion 12 is provided.

  Next, a method for adjusting the door mounting bracket 60 of this embodiment will be described. First, the adjustment bolt 42 is loosened so that the locking portion 88 and the curved engaging portion 32 are not engaged with each other, and the curved screwed portion 70 and the male screw portion 64a of the positioning bolt 64 are loosened. In this state, the positioning bolt 64 is rotated, and the slide portion 24 is moved within the slide receiving portion 12 and adjusted to a predetermined position. Further, the pair of adjustment bolts 42 are tightened to adjust the angle of the slide portion 24 with respect to the slide receiving portion 12 and cover the cover 85 in the same manner as in the above embodiment.

  The usage method of the door mounting bracket 80 of this embodiment is the same as that of the said embodiment, a door is attached to each door support member 30, and the position of the front and rear, right and left of a door is adjusted with the said adjustment method. According to the door mounting bracket 80 of this embodiment, in addition to the same effects as those of the above embodiment, the structure is simplified, and the appearance is refreshed by attaching the cover 85.

  Next, a fourth embodiment of the door mounting bracket of the present invention will be described with reference to FIG. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. The door mounting bracket 90 of this embodiment is formed by forming curved screwing portions 70 on both side surfaces of the slide portion 24. Thereby, the shaft support part 26 of the slide part 24 can be swung in the vertical direction of the drawing without using an adjustment bolt.

  Note that the door mounting bracket of the present invention is not limited to the above embodiment, and the adjustment bolt only needs to be adjustable by being screwed to the nut, so that the support member and the case body can be locked. If you do. Further, the sizes of the case body and the support member can be appropriately set according to the gate pillar to be used.

It is a schematic perspective view which shows the door attachment metal fitting of 1st embodiment of this invention. They are the top view (a) which shows the door mounting bracket of 1st embodiment of this invention, a front view (b), and a right view (c). It is the schematic perspective view (a) which shows the supporting member of the door mounting bracket of 1st embodiment of this invention, and the schematic perspective view (b) from the opposite direction to (a). It is the rear view (a) of the door attachment metal fitting of 1st embodiment of this invention, and AA sectional drawing (b) of (a). It is a partial expanded sectional view which shows the rocking | fluctuation state of the slide part of the door attachment metal fitting of 1st embodiment of this invention. It is a front view which shows the use condition of the door attachment metal fitting of 1st embodiment of this invention. It is a schematic perspective view which shows the door attachment metal fitting of 2nd embodiment of this invention. It is a cross-sectional view in the adjustment bolt position of the door attachment metal fitting of 2nd embodiment of this invention. It is a cross-sectional view at the positioning bolt position of the door mounting bracket of the second embodiment of the present invention. It is a disassembled perspective view of the door attachment metal fitting of 2nd embodiment of this invention. It is a schematic perspective view which shows the door attachment metal fitting of 3rd embodiment of this invention. It is a disassembled perspective view of the door attachment metal fitting of 3rd embodiment of this invention. It is a cross-sectional view of the door mounting bracket of the fourth embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Door attachment metal fitting 12 Slide receiving part 12a Insertion part 16 Case body 18, 40 Recess 20 Lock hole 22 Lock part 24 Slide part 28 Support shaft 30 Door support member 32 Curve engagement part 34 Insertion hole 40a Curve convex part 42 Adjustment bolt

Claims (6)

  A door support member that is integrally formed by aluminum die casting and pivotally supports the door, a slide portion provided on the door support member, an aluminum die cast case body into which the slide portion is inserted, and the case body A slide receiving portion that is provided and slidably holds the slide portion, a locking hole formed in the slide receiving portion, and a locking hole formed on the inner surface of the slide receiving portion facing the slide portion. And is formed on an R surface which is a side surface of the slide portion facing the locking portion and bulges toward the locking portion, and is formed on the surface. A curved engagement portion provided with unevenness to engage with the unevenness of the locking portion, and the R surface of the curved engagement portion is formed on an R surface having a radius of curvature relatively longer than the length of the curved engagement portion. Of the curved surface of the curved engagement portion A pair of insertion holes are formed on both sides of the top portion, and an adjustment bolt that is inserted through each insertion hole of the slide portion, and the locking portion and the slide portion of the slide receiving portion that are screwed into the tip of the adjustment bolt The door mounting bracket is provided with a nut that contacts the curved engagement portion of the door, and the position of the door support member can be adjusted and fixed by tightening the adjustment bolt.   A groove is formed in the inner wall surface of the slide receiving portion in the insertion direction of the slide portion, a bolt shaft support portion is provided on the side surface opposite to the side surface on which the slide portion extends, and the head of the positioning bolt is provided on the bolt shaft support portion. And a curved threaded portion that is a semi-arc-shaped female threaded portion that is curved and located at the curved engagement portion along the insertion direction of the slide portion, and the male threaded portion of the positioning bolt Is brought into contact with the groove, the curved threaded portion is threadedly engaged with the male threaded portion of the positioning bolt, and the positioning bolt is rotated to make the slide portion relatively to the slide receiving portion. The door mounting bracket according to claim 1, wherein the door mounting bracket is movable.   Each insertion hole of the slide portion has an inner diameter that gradually decreases from each opening side at both ends toward the center, and a cross-sectional shape in the penetrating direction is formed in a drum shape, on the side surface opposite to the curved engagement portion of the slide portion. Each of the insertion holes has a gently curved convex portion, and an adjustment bolt is inserted into the locking hole and the insertion hole, and the nut or bolt head faces each curved convex portion. The door mounting bracket according to claim 1 or 2, wherein the sliding portion is held in contact with the slide receiving portion so as to be swingable.   The adjustment bolt has a head fitted in a recess formed around the locking hole of the slide receiving portion, and the nut cannot be rotated in the recess in which the curved convex portion of the slide portion is formed. The door mounting bracket according to claim 1, wherein the door mounting bracket is fitted.   The adjusting bolt has a head abutting against a curved convex portion of a concave portion formed around an insertion hole of the slide portion, and the nut is provided on a mounting surface on a back side of the slide receiving portion. The door mounting bracket according to claim 1 or 2. The door mounting bracket according to claim 1 or 2, wherein the slide receiving portion includes a hollow fitting insertion portion having a width substantially equal to the width of the slide portion, and the slide portion is slidably held.

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