JP3524749B2 - Frame holding device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holding device for holding and fixing a frame. 2. Description of the Related Art For example, a bed apparatus for a sick person has a floor frame on which a mattress is placed on an upper surface thereof.
A head frame made of a pipe material is provided at one longitudinal end of the floor frame, and a foot frame made of the same pipe material is provided at the other end. The head frame and the foot frame are formed by bending a pipe material in a substantially inverted U-shape, and both ends in the width direction are legs. The legs are inserted into insertion holes of a holder provided at corners at both ends in the longitudinal direction of the floor frame. In some cases, the leg is not fixed to the holder, but simply inserted into the insertion hole. If not fixed, the leg may come off from the insertion hole due to an inadvertent external force. For this reason, the leg is fixed to the holder. When the leg is fixed to the holder, a screw hole communicating with the insertion hole is formed from the outer peripheral surface of the holder, and a screw is screwed into the screw hole to insert the tip into the insertion hole. The leg portion is fixed by contacting the outer peripheral surface of the leg portion. [0006] However, according to such fixing means, since the screw protrudes from the outer peripheral surface of the holding body, clothes or body may be hooked on the screw, or the appearance may be deteriorated. . Further, when the holding member is formed of a thin pipe, if the screw is screwed in to firmly fix the leg, the holding member is deformed by the reaction force or the screw hole is damaged. There was that. In addition, since a tool must be used to tighten or loosen the screw, the workability may be poor. As described above, conventionally, a screw hole penetrating from the outer peripheral surface of the holding body to the insertion hole is formed, and a screw is screwed into the screw hole to be inserted into the insertion hole. Since the legs of the inserted frame were fixed, it may be inevitable that the screws protrude from the outer peripheral surface of the holder, or if the thickness of the holder is thin, strongly tighten the screws. If the screw is screwed in, the holder and the screw hole may be damaged, and the frame may not be easily attached or detached. SUMMARY OF THE INVENTION It is an object of the present invention to provide a frame holding device which allows a leg portion of a frame to be securely and easily detachably fixed to a holding member without projecting a screw on an outer peripheral surface of the holding member. According to a first aspect of the present invention, there is provided a holding device for holding and fixing a leg of a frame, comprising: a holding body having an insertion hole formed therein; An outer cylinder which is held by the holding body so as not to be able to be pulled out; An inner cylinder to be inserted; and an inner cylinder provided at a lower end of the inner cylinder so as to be elastically deformable in a radial direction and elastically engaged with an engaging portion formed at a lower end of the outer cylinder. An engagement piece that prevents the inner cylinder from being pulled out of the outer cylinder, and a slidingly attached to the lower end of the inner cylinder and slid in a predetermined direction to move the engagement piece radially inward of the inner cylinder. A release member that is elastically deformed to release engagement with the engagement portion of the outer cylinder. And features. According to the first aspect of the present invention, the engaging piece of the inner cylindrical body externally fitted and fixed to the lower end of the leg of the frame is elastically engaged with the engaging portion formed at the lower end of the outer cylindrical body. At the same time, these engagements can be released by sliding a release member slidably provided at the lower end of the inner cylindrical body. Not only can be fixed, but also the frame can be easily and quickly attached to and detached from the holder. An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows a bed apparatus, which comprises a base frame 1 movably formed by casters 2 with stoppers. An upper and lower frame 4 is provided on the base frame 1 so as to be vertically movable by an up and down driving mechanism 3. The upper and lower frames 4 are formed in a rectangular frame shape, and holding members 5 are provided at four corners. As shown in FIG. 4, the holder 5 has a rectangular frame shape divided into an upper member 6 and a lower member 7, and is formed by joining and fixing these members 6, 7 with screws or the like. . A first insertion portion 9 into which the long rod 8 constituting the upper and lower frames 4 is inserted is inserted into the holder 5.
And a second insertion portion 12 which is orthogonal to the first insertion portion 9 and into which the short rod 11 constituting the upper and lower frames 4 is inserted. The holder 5 protrudes from both sides of the upper and lower frames 4 in the width direction, and has a protruding end formed by a headboard fence 13 and a footboard fence 14 formed by a metal pipe as a frame. An insertion hole 16 is formed as a holding portion into which the lower end is inserted and held. Each of the board fences 1 is inserted into an insertion hole 16 of a pair of holding members 5 provided on both sides of the upper and lower frames 4 in the width direction.
The lower ends of the legs 13a and 14a at both ends in the width direction of the members 3 and 14 are inserted, and are detachably held and fixed to the holder 5 by a holding device 30 of the present invention described later. A floor plate 17 is provided on the upper surface of the upper and lower frames 4. The floor plate 17 is divided into a plurality of floor portions, in this embodiment, first to fifth floor portions 17a to 17e. The central third floor 17c is fixed to the upper and lower frames 4, and a second floor 17b and a first floor 17a are sequentially connected to one side of the floor 17c so as to be freely rotatable. On the side, the remaining two fourth floor portions 17d and the fifth floor portion 17e are sequentially rotatably connected. A drive mechanism 21 is provided on the upper and lower frames 4. The driving mechanism 21 is a first driven
Arm 22 and a second arm 23. The first arc
A pair of rollers 24 are rotatably provided at the distal end of the room 22, and the rollers 24 roll on a rail 25 provided along the longitudinal direction of the lower surface of the first floor portion 17a. Freely engaged. Therefore, when the first arm 22 is rotated in the upright direction, the first floor 17a and the second floor 1 are rotated.
7b is raised in the upright direction. A roller 26 is provided at the end of the second arm 23, and the roller 26 is in rolling contact with the lower surface of the fourth floor 17d. Therefore, this second arm 2
When the third member 3 rotates in the rising direction, the fourth floor portion 17d rises in the rising direction, so that the fifth floor portion 17e also moves in conjunction with this rising, and these floor portions 17d, 17e are formed in a substantially U-shape. It is designed to bend. The upper and lower frames 4 and the fifth floor 17e are connected by a ring 27 so as to hold the fifth floor 17e interlocked with the fourth floor 17d in that state. . As shown in FIG. 1, each of the board fences 13, 1
The upper ends of the connecting pipes 31 are fitted and fixed to the lower ends of the four legs 13a and 14a via connecting rings 31a. The connecting pipe 31 is detachably attached to the holding body 5 by the holding device 30 described above. The holding device 30 has an inner cylinder 33 which is fitted over the connecting pipe 31 and fixed by screws 32. A flange 34 is provided at the upper end of the inner cylinder 33,
A small diameter portion 35 is provided at the lower end. This small diameter part 3
5 is provided with two engagement pieces 36 at predetermined intervals in the circumferential direction, for example, at 180-degree intervals so as to be elastically deformable in the radial direction. That is, the lower end of the engagement piece 36 is integrally connected to the small diameter portion 35 of the inner cylinder 33, and the upper end and both sides are separated. Therefore, the engagement piece 36 can be elastically deformed radially inward at the upper end with the lower end as a fulcrum, as shown by the chain line in FIG. As shown in FIG. 5, the cross-sectional shape of the engagement piece 36 is formed in a convex shape on the outer surface side, and a concave portion 37 is formed at the top of the outer surface. Thereby,
On the outer surface of the engagement piece 36, a slide slope 38 is formed on an upper side thereof, and a wedge-shaped convex portion 39 projecting radially outward from the outer peripheral surface of the inner cylinder 33 is formed on a lower end side. The outer dimension D1 of the recess 37 is larger than the outer dimension D2 of the upper end of the engagement piece 36. A cap-shaped release member 41 is slidably mounted on the small diameter portion 35 of the inner cylinder 33. The outer dimension of the release member 41 is set slightly smaller than the outer dimension of the inner cylinder 33, and the inner diameter is set to be substantially the same as the outer dimension D2 of the upper end of the engagement piece 36. A pair of elongated rectangular openings 42 are formed in the peripheral wall of the release member 41 at positions corresponding to the pair of engagement pieces 36 along the axial direction. The convex portion 39 of the piece 36 protrudes. In addition, a portion of the peripheral wall of the release member 41 above the opening 42, that is, the band portion 41 a has a smaller width dimension than the concave portion 37 of the engagement piece 36. The release member 41 is normally located at a position shown by a solid line in FIG. 5, and can be slid downward from this position to a position shown by a chain line in FIG. When the release member 41 is slid downward, the slide slope 38 of the engagement piece 36 is moved to the upper edge of the opening 42,
That is, it is pressed by the strip 41a. Thereby, the engagement piece 36 is elastically deformed inward in the radial direction as shown by a chain line in FIG. When the belt-like portion 41a slides to the concave portion 37, the convex portion 39 prevents further sliding downward. The release member 41 slid downward.
Is pushed up in the ascending direction, so that the first position in that direction, that is, the strip 41a is disengaged from the recess 37 and the engagement piece 37
Can be raised to a position facing the front end portion. A concave portion 4 is provided on the outer peripheral surface of the release member 41 for facilitating a hand when sliding downward.
1a is formed over the entire circumference. The inner cylinder 33 is slidably inserted into and held by the outer cylinder 45. The outer cylinder 45 is inserted and held in an insertion hole 16 formed in the holder 5. The outer cylinder 45 is formed to be longer than the length of the insertion hole 16 in the axial direction, and shorter than the inner cylinder 33. further,
The inner diameter of the outer cylinder 45 is set to be substantially the same as the inner diameter of the inner cylinder 33. The outer cylinder 45 is formed at its upper end with a flange 46 which engages with the upper end surface of the insertion hole 16 of the holder 5 and at the outer periphery of the lower end it is formed on the peripheral wall as shown by a chain line in FIG. A pair of elastic pieces 48 are formed at positions shifted by 180 degrees in the circumferential direction by the slit 47a. Each elastic piece 48
A locking projection 49 is formed on the outer surface of the lower end of the head. Further, an engagement recess 51 as an engagement portion is formed on the inner periphery of the lower end of the outer cylinder 45 as shown in FIG. The outer cylinder 45 is provided in the insertion hole 1 of the holder 5.
6, the lower end portion is made to protrude. As shown in FIG. 1, a ring-shaped stopper 52 made of an elastic material such as rubber or synthetic resin is attached to the lower end of the outer cylinder 45 by elastically deforming the elastic piece 48 radially inward. It is held by the locking projection 49. Thereby, the outer cylinder 45 is held in the insertion hole 16 so as not to be able to be pulled out. The outer cylinder 45 held in the insertion hole 16 of the holder 5 has legs 13a, 1 of the board fences 13, 14, respectively.
The inner cylinder 33 attached to the connecting pipe 31 at the lower end of 4a is inserted and held. When the inner cylinder 33 is inserted into the outer cylinder 45 until the upper end flange 34 of the inner cylinder 33 contacts the flange 46 of the outer cylinder 45, the small diameter portion 35 formed at the lower end portion is inserted into the outer cylinder 45.
Protrudes from the lower end. At this time, the engagement piece 36 of the small diameter portion 35 is elastically deformed radially inward by the projection 39 formed thereon contacting the inner peripheral surface of the outer cylinder 45. When the projection 39 moves to the engagement recess 51 formed at the lower end of the inner surface of the outer cylinder 45, the engagement piece 36 is elastically restored outward in the radial direction, and 5
Engage with 1. As a result, the outer cylinder 45 is held by the inner cylinder 33 so that it cannot be pulled out. Next, the legs 13a, 14a of the board fences 13, 14 are held by the holding device 30 by the holding device 30 having the above-described structure.
The case of inserting and holding in the insertion hole 16 will be described. First, the leg portions 13a and 14a of the board fences 13 and 14 to which the inner cylinder 33 is fitted are inserted into the outer cylinder 45 provided in the insertion hole 16 of the holder 5. As a result, the convex portion 39 of the engaging piece 36 provided on the small diameter portion 35 at the lower end of the inner cylinder 33 is pressed by the inner peripheral surface of the outer cylinder 45. It elastically deforms inward. And the above-mentioned convex part 39 is the outer cylinder 45.
When it comes to the engagement recess 51 at the lower end of the
6 is elastically restored outward in the radial direction, so that the projection 39
Are engaged with the engagement recesses 51. As a result, the inner cylinder 33 is connected to the outer cylinder 4
5 is held so that it cannot be pulled out. That is, only by inserting the inner cylinder 33 into the outer cylinder 45 provided on the holder 5,
Each of the board fences 13 and 14 to which the inner cylinder 33 is attached can be held and fixed to the upper and lower frames 4 of the bed device, which is the holding body 5 to which the outer cylinder 45 is attached. When the board fences 13 and 14 are to be removed from the holder 5, the release member 41 provided on the small diameter portion 35 at the lower end of the inner cylinder 33 protruding from the lower end of the outer cylinder 45 is attached to the band-like portion. The wing 41a is slid in the descending direction until it engages with the concave portion 37. Thus, the strip 41 of the release member 41
a presses the slide slope 38 to elastically deform the engagement piece 35 radially inward. Even if the band-shaped portion 41a engages with the concave portion 37, the deformed state of the engaging piece 35 is maintained, so that the convex portion 39 provided on the engaging piece 35 and the engaging portion formed at the lower end of the outer cylinder 45 are provided. The state of being disengaged from the engagement recess 47 is maintained. Therefore, in this state, each of the board fences 1
When the board fences 13 and 14 are lifted, the board fences 13 and 14 can be removed from the holder 5. That is, the engagement piece 36 having the convex portion 39 is provided on the small diameter portion 35 at the lower end of the inner cylinder 33, and the release member 41 slidably provided on the small diameter portion 35 is slid, whereby the engagement piece 3
6 is elastically deformed so that the convex portion 39 is engaged with and disengaged from the engaging concave portion 47 formed at the lower end of the outer cylinder 45, so that the inner cylinder 33 can be attached to and detached from the outer cylinder 45. For this reason, the board fences 13 and 14 to which the inner cylinder 33 is attached are quickly attached to and detached from the upper and lower frames 4 of the bed apparatus to which the outer cylinder 45 is attached by a simple operation. be able to. In addition, the holding device 30 having the above-described structure is
3, the outer cylinder 45 and the release member 41 can be composed of three parts, so that a simple configuration can be achieved with a small number of parts. The present invention can be modified without departing from the gist. For example, the frame is not limited to that formed by a metal pipe, and may be a solid metal rod or at least a leg formed by a wooden rod. According to the first aspect of the present invention, the engaging piece formed on the inner cylindrical body fitted and fixed to the lower end of the leg of the frame is formed on the lower end of the outer cylindrical body. The engaging portions are elastically engaged with each other, and these engagements can be released by sliding a releasing member slidably provided at a lower end portion of the inner cylindrical body. Therefore, not only can the legs be fixed without projecting screws on the outer periphery of the holder, but also the frame can be easily and quickly attached to and detached from the holder. Moreover, since the holding device can be composed of the inner cylinder, the outer cylinder and the release member, a simple configuration can be achieved with a small number of parts.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a leg connection structure showing one embodiment of the present invention. FIG. 2 is a side view of the bed device. FIG. 3 is a front view of the board fence. FIG. 4 is an exploded perspective view of the holder. FIG. 5 is an enlarged sectional view of a lower end portion of the holding device. FIG. 6 is an exploded perspective view of an inner cylinder and a release member. [Description of References] 5 ... Holders 13, 14 ... Board fences 13a, 14a ... Legs 16 ... Insertion holes 33 ... Inner cylinder 36 ... Engaging piece 41 ... Release member 45 ... Outer cylinder 51 ... Engaging recess ( Engagement part) 52 Stopper

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A47C 17/00-25/02 A47C 29/00

Claims (1)

(57) [Claim 1] A holding device for holding and fixing a leg portion of a frame, comprising: a holding member having an insertion hole formed therein; and a holding member inserted into the insertion hole and being held by holding means. An outer cylinder which is retained so as not to be pulled out of the outer cylinder; And an inner cylinder is provided at the lower end of the inner cylinder so as to be elastically deformable in a radial direction, and is elastically engaged with an engaging portion formed at a lower end of the outer cylinder to move the inner cylinder from the outer cylinder. An engagement piece that is prevented from being pulled out, and is slidably mounted on the lower end of the inner cylinder and slid in a predetermined direction to elastically deform the engagement piece radially inward of the inner cylinder, A release member for releasing the engagement with the engagement portion of the outer cylinder. Of the holding device.