Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
  • B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
  • B44D3/18—Boards or sheets with surfaces prepared for painting or drawing pictures; Stretching frames for canvases
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
  • B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
  • B44D3/18—Boards or sheets with surfaces prepared for painting or drawing pictures; Stretching frames for canvases
  • B44D3/185—Stretching frames for canvases
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
  • D06C3/00—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics
  • D06C3/08—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics by frames or like apparatus

Definitions

• the present invention relates to a coupling structure for coupling at a corner of a cloth stretching frame for stretching a cloth such as a painting canvas or the like, or at a corner of an architrave, or adapted to used for building materials, and further relates to a cloth stretching frame using the coupling structure.
• an object of the present invention is to provide a coupling structure which can simplify the coupling work.
• Another object of the present invention ' is to provide a coupling structure and a cloth stretching frame which exhibit easy fitting and hard come-off, and which can absorb dimensional errors, and a cloth stretching frame.
• Another object of the present invention is to provide a coupling structure and a cloth stretching frame
• Another object of the present invention is to provided a coupling structure and a cloth stretching frame with which the end face shape of the members to be coupled, is not subject to limitations, and further, the coupling parts can be closely fitted together.
• a coupling structure comprising a pair of members to be coupled, having hollow coupling parts, and a coupling member having at its opposite end faces, coupling hollow parts, and a coupling member having at opposite ends press-fit parts adapted to be press-fitted in the hollow coupling parts, characterized in that angle-like convexities and concavities having crests adapted to be collapsed upon fitting, are formed on at least either one of the inner peripheral surfaces of the above-mentioned coupling members and the outer peripheral surfaces of the above-mentioned press-fit parts.
• the hollow coupling parts have a rectangular cross-sectional shape, and concavities and convexities are formed on the inner peripheral surface, being arranged circumferentially, and the coupling member is formed of a V-like plan shape flat plate, having its outer surface formed thereon with concavities and convexities which are arranged in a direction orthogonal to the projecting direction of the bent part thereof.
• the above-mentioned hollow coupling pars have a rectangular cross-sectional shape, and concavities and convexities are formed on the inner peripheral surfaces thereof, being arranged circumferentially, and the coupling member is formed of a bent plate which is formed on the outer surface thereof with concavities and convexities arranged from the bent part to the opposite end thereof.
• the hollow coupling parts have a rectangular cross-sectional shape, concavities and convexities which are circumferentially arranged on the inner peripheral surface are formed on at least either one of a pair of opposed surfaces of the rectangular cross- sectional shape, and at least one of a convexity is formed on the other one of the pair of opposed surfaces.
• the above-mentioned plurality of hollow coupling parts each have a rectangular cross-sectional shape, and at least one of the hollow coupling parts has a widthwise direction which is orthogonal to that of the other hollow coupling parts.
• a plurality of members to be coupled having at their opposed surface hollow coupling parts, and a coupling member formed of an extrusion-molded hollow body that is cut so as to have dimensions with which the coupling member can be press- fitted into the above-mentioned hollow coupling parts, the end parts of the coupling members being adapted to be inserted into the above-mentioned hollow coupling parts.
• one end part of the hollow coupling member is press-fitted in a hollow coupling part of one of the members to be coupled, and the other end part of the coupling member is press-fitted in a hollow coupling part of another member to be coupled, whereby a plurality of members to be coupled can be coupled together by the coupling members.
• the coupling member can be formed of an extrusion-molded hollow body that is cut so as to have dimensions with which the coupling member can be press-fitted into the hollow coupling part
• the hollow part of the coupling member can exhibit a resiliency more or less when an end part of the coupling member is press-fitted in the hollow coupling part
• the press-fitting can be facilitated in comparison with a coupling member having no hollow part
• the coupling part can be closely fitted in the hollow coupling part without looseness but with a high binding force so that the dimensional errors of the hollow coupling part and the coupling member can be absorbed, resulting in easy fitting, thereby it is possible to facilitate the coupling between the members to be coupled.
• the coupling member is formed by cutting a molded article, the manufacturing thereof can be facilitated.
• the opposed surfaces of above-mentioned coupling member are inclined, having an L- like shape so that the above-mentioned members to be coupled are coupled at a right angle, the corner part thereof having a reinforcing member and the opposite end faces thereof being flush with the above-mentioned opposed surfaces in a direction substantially orthogonal to the latter.
• the coupling member and the members to be couple can be extrusion-molded, and further, the strength of the coupling member can be enhanced by the reinforcing member, thereby it is possible to decrease the thickness of the wall of the coupling member. Since the surfaces of the hollow body corresponding to the opposite ends of the coupling member are flush, the hollow body can be stably, safely and easily cut by supporting these surfaces on a support surface, and further, the opposite end parts of the coupling member can be easily press-fitted in the hollow coupling parts.
• concavities and convexities are formed on a contact surface of at least either one of the above-mentioned coupling member and the above-mentioned members to be coupled.
• the coupling member can be easily press-fitted, and tip ends of the convexities are made into press-contact with the associated contact surface so as to exhibit a strong binding force. Further, it the concavities and convexities are formed on both contact surfaces, tip ends of the convexities are meshed with one another so as to exhibit a strong binding force.
• a plurality of a plate members having a half-lap surface formed at least either one of the rear surface of one side part and the front surface of the other side pat, and recesses formed on each of the half-lap surfaces so that the recesses face to each other when the half-lap surfaces are superposed with each other, and adapted to be joined by half-lap joint therebetween, and a coupling member adapted to be fitted in the recesses in the half-lap surfaces of the above-mentioned plurality of plate members.
• the above-mentioned coupling member is hollow, and one side part thereof is convexly curved outward.
• the coupling member when the coupling member is press-fitted in the recess, the curved part is resiliently deformed, and accordingly, the coupling member can be easily press-fitted in the recess, and the binding force can be enhanced.
• the recess has angle- shape concavities and convexities having large pitches
• the above-mentioned coupling member has angle-shape concavities and convexities having pitches smaller than that of the former.
• the convexities can be easily press-fitted in the concavities.
• the coupling structure when the convexities of the coupling member are fitted in the concavities of the members to be coupled, since the crests of convexities are press-contacts with the associated opposed surfaces, the crests of the convexities wedge into the associated opposed surfaces, or are collapsed thereby in such a case that the convexities are formed on only one side, crests of the convexities are collapsed by one another, or either of the convexities are collapsed by other in such a case that the convexities are formed on both sides, thereby it is possible to closely couple them with each other. Accordingly, the coupling member can be easily fitted in the members to be coupled so that they can hardly come off from each other, and further, dimensional error can be absorbed.
• the above-mentioned coupling member is formed of a material having a flexibility equal to or higher than that of the above-mentioned members to be coupled.
• the coupling member is made of a plastic material which is softer than that of the members to be coupled.
• the coupling member can be easily manufactured
• each of the above- mentioned members to be coupled has, at one side surface, a pin insertion hole communicating to the above-mentioned recess, and the above-mentioned coupling member has a cave formed one of the opposed surfaces of the above-mentioned protrusion, and a pin fitting barrel part located in the cave at a position aligned with the pin insertion hole, a pin being fitted in the barrel part through the pin insertion hole.
• each of the above-mentioned members to be coupled has, at one side surface, a pin insertion hole communicating to the above-mentioned recess, and the above- mentioned coupling member has a hollow part communicating to a side part of the above-mentioned protrusion, and a pair of clamping pieces projected from the inner surface of the hollow part at a position aligned with the pin insertion hole, a pin being clamped between the clamping pieces through the pin insertion hole.
• members to be coupled having, at its end face, a recess, and a coupling member which has at its end face an abutting part adapted to abut against the former end face, and from which a protrusion adapted to be fitted in the recess is projected, and a protrusion having a crest made into press- contact with the associated surface is formed at least either the inner surface of the recess or the outer surface of the protrusion.
• the intermediate part of the coupling member is exposed from the members to be coupled, if the material of the coupling member is different from that of the other and so forth, a gap which is even defined more or less between the abutting part and the end face of the coupling part, can be made to be unnoticeable by means of the different material.
• the above-mentioned members to be coupled have a pin insertion hole communicating to the above-mentioned recess on a side surface thereof, and the above-mentioned coupling member has a pin attaching part formed on the above-mentioned protrusion at a position which is aligned with the pin insertion hole, a pin being inserted into the pin insertion hole, and is then fitted in the pin attaching part.
• the above-mentioned protrusion is composed of a pair of projecting parts which are juxtaposed, being spaced from each other, and which are adapted to be fitted in the recess.
• a cloth stretching frame is composed of frame pieces each defining one side of the cloth stretching frame, and each having hollow coupling parts formed therein, a cloth fixing bead part formed on the front surface thereof, a groove extending between the outer surface to the rear surface thereof, and frictionally locking concavities and convexities formed on the inner surface of the groove, and coupling members each formed from an extrusion-molded, L-like cross-sectional shape hollow member that is cut so as to have dimensions with which opposite end part of the coupling member can be fitted in the hollow coupling parts.
• a folding-back and hooking piece for folding back one edge part of the cloth and also hooking the same onto a hook is extended on the rear surface of at least one of the frame pieces which defines the upper side of the frame, at a level below the above-mentioned groove.
• the edge part of the cloth which is stretched and fixed in the groove by the fixtures is folded back by the folding-back and hooking piece, and is fixed to the same by retainers such as clips as other members so as to enhance its appearance. Further, the folding-back and hooking piece is hooked to a hook provided on a wall surface, so that the cloth stretching frame can be conveniently hung on a wall surface.
• a projecting part is formed on the rear surface of the frame piece so as to form a slope surface continuous to the above-mentioned outer surface of the frame piece, and the above-mentioned groove is formed in this slip surface, a bead part cooperating with a canvas stretching pliers is formed in the groove on the side remote from the above-mentioned outer surface.
• the groove is formed in the slope surface so that the fixtures becomes hardly visible, thereby it is possible to enhance the appearance thereof. Further, by supporting the projecting project part of the pliers to the pliers cooperating bead part, a cloth can be stretched easily and fully on the slope surface under leverage, and further, the bead part on which the supporting project part of the pliers is supported, is projected linearly so that the position thereof can be easily located, thereby it is possible to facilitate the cloth stretching work, and further it is possible to fix a fixture in the groove in a cloth stretching condition.
• the bead part has suspender attaching holes.
• the cloth stretching frame by attaching a suspender to the suspender attaching holes, the cloth stretching frame can be simply suspended on a wall surface or the like.
• a cloth hooking bead part is formed on the slope surface on the outer surface side of the groove.
• this cloth stretching frame by retaining the cloth with the use of the head part of the fixture in the vicinity of the bead part, the cloth can be caught on the bead part, and accordingly, the cloth can hardly slack, and due to the provision of the bead part, the head part is more hardly visible from the front surface side of the frame piece.
• the above-mentioned frame piece has a bar receiver which is projected in a direction inward of the cloth stretching frame, coupling holes formed in the bar receiver, reinforcing bar fixing grooves formed in the inner surface of the frame piece of the cloth stretching frame, a reinforcing bar having end parts formed at their side surfaces with screw holes aligned with the above-mentioned coupling holes being provided, and side grooves aligned with the above-mentioned reinforcing bar fixing grooves formed on opposite sides, and a coupling member adapted to be press-fitted in the side grooves and the reinforcing bar fixing groove is provided.
• the reinforcing bar can easily and surely be attached.
• frame pieces each defining each side of the cloth stretching frame, having, at end faces, recesses, a cloth stretching bead part formed on the front surface thereof, a groove extending from the outer surface to the rear surface, and frictionally locking concavities and convexities formed in the inner surface of the groove; and a coupling member having a continuous groove continuous to the end part of the former groove, extending from the outer surface to the rear surface, a protrusion being formed at least either one of the inner surface of the groove and the outer surface of the projecting part, and having a crest adapted to be made into press-contact with the other one.
• Fig. 1 is a partial exploded perspective view illustrating a cloth stretching frame upon which a first embodiment of the present invention is applied;
• Fig. 2 is a perspective illustrating a coupling member
• Fig. 3 is a front view illustrating the cloth stretching frame
• Fig. 4 is a partial plan view illustrating a strip plate from the a coupling member is punched out
• Fig. 5 is a partial cross-sectional view showing a condition in which the coupling member is connected to members to be coupled;
• Fig. 6 is a perspective view illustrating a second embodiment
• Fig. 7 is an end view illustrating a frame piece of a cloth stretching frame in which a third embodiment is applied;
• Fig. 8 is an end view illustrating a frame piece of a cloth stretching frame in which a fourth embodiment is applied;
• Fig. 9 is an end view illustrating a frame piece of cloth stretching frame in which a fifth embodiment is applied.
• Fig. 10 is an end view illustrating a frame piece of a cloth stretching frame in which a sixth embodiment is applied:
• Fig. 11 is a partial exploded perspective view illustrating a cloth stretching frame in which a seventh embodiment is applied;
• Fig. 12 is a side view illustrating a coupling member
• Fig. 13 is a sectional view illustrating a frame piece in a condition in which a cloth is stretched
• Fig. 14 is a perspective view illustrating a coupling member in an eighth embodiment of the present invention
• Fig. 15 is a partial exploded perspective view illustrating a coupling member and a member to be coupled, in a ninth embodiment of the present invention
• Fig. 16 is an enlarged view illustrating a condition in which a pin is clamped between clamping pieces:
• Fig. 17 is a partial cross-sectional view illustrating a cloth stretching frame in which a ten-th embodiment is applied;
• Fig. 18 is an enlarged view illustrating a ten-th embodiment shown in Fig. 17;
• Fig. 19 is a perspective view illustrating a coupling member in an eleven-th embodiment of the present invention:
• Fig, 20 is a partial perspective view illustrating a frame piece of a cloth stretching frame
• Fig. 21 is an end view illustrating a coupling member
• Fig. 22 is a partial view illustrating an inner surface of a corner part of a recess as viewed in front thereof;
• Fig. 23 is a sectional view illustrating a variant form of a protrusion
• Fig. 24 is an explanatory view for a condition in which concavities and convexities are meshed with one another;
• Fig, 25 is a perspective view illustrating a member to be coupled and a coupling member in a twelve-th embodiment, the coupling member is in a condition before separation from a hollow body:
• Fig. 26 is a sectional view illustrating a frame piece of a cloth stretching frame in which a thirteen-th embodiment is applied:
• Fig. 27 is a sectional view illustrating a reinforcing bar
• Fig. 28 is a side view illustrating a coupling member
• Fig. 29 is a partial enlarged view illustrating a part thereof:
• Fig. 30 is an explanatory view illustrating a procedure of attaching a coupling member. DESCRIPTION OF PREFERRED EMBODIMENTS
• this coupling structure has a plurality of frame pieces la to Id as members to be coupled, and a coupling member 2.
• the plurality of frame pieces la to Id are made of aluminum, and have been extrusion-molded.
• the frame is composed of a frame piece la serving as an upper frame, a frame piece lc serving as a lower frame, and frame lb. Id serving as side frames, having their opposite end faces which are inclined surfaces at an angle of about 45 deg.
• the frame pieces la to Id which has been extrusion- molded have following structures. That is, as shown in Fig.
• each of the frame pieces la to Id has a recess 7 formed in the outer surface which defines an outer peripheral surface of a frame, a cloth stretching bead part 5 on the front end side nearer to the front side of the frame, than the groove 7, and a hollow coupling part 4 in which one end part of a coupling member 2 is fitted, and which is formed in each end part.
• the inner wall surface of the groove 7 is formed thereon with concavities and convexities 8 for frictionally locking a leg part 19 of a fixture 3, and the inner peripheral surface of the hollow coupling part 4 is formed thereon with concavities and convexities 15.
• the coupling member 2 has a press-fitting part 4 adapted to be press-fitted in the hollow coupling part 11, at each end thereof.
• the press-fitting part 11 is formed on the outer peripheral surface thereof with angle-shape concavities and convexities 22.
• a band plate 21 is prepared.
• the band plate 22 having a width of, for example, 60 mm, is formed in the center part on each of opposite surfaces thereof with the angle shape concavities and convexities 22 having a width of about 30 mm, which extend widthwise.
• the height of the crests of the concavities and convexities 22 is about 0.5 mm.
• a plurality of coupling members 2 are successively cut into a V-like shape from the band plate 21 in the longitudinal direction, and accordingly, planar coupling members 2 having a V-like shape in a plan view and arranged in a direction orthogonal to the projecting direction of the bent part are formed.
• each coupling member 2 is tapered so that the width of the opposite end parts thereof is smaller than that of the V- like bent part in order to be easily inserted into the hollow coupling parts 4.
• plate 21 may have a thickness which is slightly larger in the center part thereof having a front and rear surface which are flat, and may be longitudinally cut into a V-like shape as shown in Fig. 4, so as to form coupling members 2 without concavities and convexities.
• Fig. 5 which shows a condition in which adjacent frame pieces la, Id are coupled with the coupling member 2, the concavities and convexities 15, 22 are meshed with each other for coupling, having their longitudinal directions crossing together at an angle of about 45 deg.
• convex parts of the concavities and convexities 15, 22 are collapsed by one another so as to provide a coupling condition. Accordingly, the frame pieces la, Id are surely and firmly coupled together without using a screw or the like.
• four coupling members 2 are interposed between the frame pieces la to Id, and then, the frame pieces la to Id are knocked so that they are all assembled together, simultaneously.
• the fixture 3 is adapted to fix a cloth 18 such as a canvas adapted to be stretched at the front of the cloth stretching frame.
• the fixture 3 in this embodiment has a leg part 19 which is adapted to break through the cloth 18, and is driven into the groove 7, and a head part 20 for pressing the cloth 18 against the outer surface 16.
• the cloth 18 is set on the front surface 13 of the cloth stretching frame 1 composed of the frame pieces la to Id which are coupled together by means of four coupling members 2, and the peripheral edge part of the cloth 18 is wound around onto the outer surfaces 6 of the frame pieces la to Id while it is supported to the cloth stretching bead parts 5.
• the peripheral edge part is pulled toward the rear side of the frame by pliers or the like, and then, the leg part 19 of the fixture 3 is driven into the groove 7 so that it breaks through the cloth 18, while the cloth 18 is pressed against the outer surfaces 16 of the frame pieces la to Id of the head part 20.
• the cloth 18 is stretched in such a condition that the center side of the cloth 18 is drawn toward the peripheral edge.
• the concavities and convexities 8 are formed on the inner surface of the groove 7, they are easily frictionally locked to the leg part 19 of the fixture 3 only by press-fitting the fixture 3.
• the material of the fixture 3 is preferably softer than that of the cloth stretching frame 1. However, it may be made of a hard material such as steel which is harder than that of the frame pieces la to Id, so that the convex parts of the concavities and convexities 15 are collapsed for locking.
• FIG. 3 there is shown a reinforcing bar 21.
• the hollow coupling part 4 has a rectangular cross-sectional shape, having concavities and convexities 15 which are arranged in the circumferential direction of the inner peripheral surface
• the coupling member 2 is a planar V-like flat plate, having its outer surface formed thereon with concavities and convexities 22 which are arranged in a direction orthogonal to the projecting direction of the bent part. Accordingly, the extending directions of the concavities and convexities 15, 22 cross together at an angle of about 45 deg. so that the crests of the convex parts thereof are locked together, being collapsed by one another, and the frame pieces la to Id as the members to be coupled, and the coupling members may be extrusion-molded, thereby it is possible to easily manufacture thereof.
• angle shape concavities and convexities 15, 22 may be formed on at least either one of the members to be coupled and the coupling members 2.
• Fig. 6 shows a second embodiment of the present invention, that is, the coupling structure is applied in such a case that a pair of planar members to be coupled are connected in the thicknesswise direction thereof.
• the structure of the members to be coupled has a cross-sectional shape which is substantially the same as that shown in Fig. 1, a coupling member 2 is bent into a V-like shape in the thicknesswise direction, that is, it has a bent V-like shape, and the concavities and convexities 22 on the outer surface thereof, are arranged in a direction from the bent part to the end parts of the coupling member 2 ' , and are extended in parallel with each other in the widthwise direction. It is noted that the corner part on the projecting surface side of the bent part is formed so as to be lower than that of the convex parts of the concavities and convexities 22.
• the coupling member to which the coupling member 2 is applied is a panel or the like, the joint surfaces are inclined at an angle of about 45 deg in the thicknesswise direction, so as to form hollow coupling parts in which the coupling members 2 can be fitted, on the joint surfaces of the member to be coupled. Further, concavities and convexities similar to those in the first embodiment are formed on the inner surfaces of the hollow coupling parts.
• the coupling member 2 in this embodiment can be extrusion-molded.
• the concavities and convexities 22 are inclined widthwise of the coupling member 2, it can be manufactured by casting. Further, similar to that first embodiment, it is sufficient that the concavities and convexities 15, 22 may be formed on at least either one of the members 1 to be coupled or the coupling member 2.
• Fig. 7 shows a cloth stretching frame in which a third embodiment of the present invention is applied. That is, in this coupling structure, in comparison with the first embodiment, the hollow coupling parts 4 of the members la to Id to be coupled have an angular shape cross-sectional shape, in particular, a substantially rectangular shape cross-sectional shape, and further, the concavities and convexities 15 arranged in the circumferential direction of the inner peripheral surface are formed on one of opposed surface in the angular cross-sectional shape, and a groove is formed in the center part of the other of the opposed surfaces while corner parts 25' for setting the width of the rectangular shape are left on opposite sides of the groove. Further, a protrusion 30 is formed on each of the other opposed side surfaces.
• slope surfaces are formed on the front surfaces thereof, in its entirety, and when the frame pieces la to Id are assembled so as to stretch the cloth, the cloth is supported only on the cloth stretching bead parts 5.
• the frame pieces la to Id are formed also by extrusion-molding aluminum.
• Reference numeral 31 denotes a recess having an opening at its front surface. The remainder of this embodiment are similar to the first embodiment, identical reference numerals are attached to the common parts.
• the hollow coupling part 4 has an angular cross-sectional shape, and the concavities and convexities 15 arranged circumferentially of the inner peripheral surface, are formed on at least either one of opposed surfaces of the angular cross-sectional shape, and at least one protrusion 30 is formed on each of the other opposed surfaces thereof. Th s, the number of the concavities and convexities can be reduced while the coupling strength is ensured, thereby it is possible to simplify the molding surfaces of molding dies.
• a plurality of protrusions 30 may be formed.
• Fig. 8 shows a cloth stretching frame in which a fourth embodiment of the present invention is applied. That is, the frame pieces la to Id in this cloth stretching frame have a plurality of hollow coupling parts 4, 4a in the third embodiment.
• a pair of hollow coupling parts 4, 4a are arranged being overlapped with each other, in the longitudinal direction of a rectangular cross- sectional shape, and concavities and convexities 15a similar to the concavities and convexities 15 are formed even in the hollow coupling part 4a.
• Reference numeral 32 is a recess formed in the front surface side, bridging between the hollow coupling parts 4, 4a, being juxtaposed with a recess 31. The remainder of this embodiment are similar to the third embodiment.
• a fifth embodiment of the present invention shows in Fig. 9. That is, the frame pieces la to Id of this cloth stretching frame have a plurality of hollow coupling parts 4, 4a are shifted in a short side direction and a long side direction of a rectangular cross-sectional shape in the fourth embodiment. Accordingly, the width of the frame is less than that of the fourth embodiment, but the thickness thereof is more or less increased. The reason why the width of the frame is small is such that the hollow coupling part 4 is formed in the position corresponding to the recess 31 in the fourth embodiment 4.
• Reference numeral 33 denotes a recess
• 33 denotes a recess into which a fixture (which is not shown) is driven when the cloth stretching frame is loaded on a support bed (which is not shown) , and concavities and convexities having pitches which are small than that of the concavities and convexities 8 are formed in the inner surface thereof.
• 34, 35 denote projecting pieces between which one end part of the reinforcing bar is fitted if the reinforcing bars (refer to 21 in Fig. 3) are interposed between the frame pieces la to Id.
• the cloth stretching frame becomes larger than that of the fourth embodiment, that is, the space between the pair of hollow coupling parts 4, 4a becomes larger than that in the fourth embodiment, and a hollow part 39 is formed therebetween.
• the remainder are similar to the fourth embodiment.
• a rod-like resilient member 52 such as a circular rod made of rubber, formed urethane or the like
• fine concavities and convexities may be formed around the resilient member 52.
• concavities and convexities may be formed circumferentially, or may be formed circumferentially and axially.
• an edge part of the cloth 8 is located above the recess 34 into which then the resilient member 52 is then pushed so that the cloth 8 is stretched and secured.
• fine angle shape concavities and convexities are formed on the outer surfaces 6 of the frame pieces la to Id in order to check the cloth from slipping.
• this coupling structure comprises a plurality of frame pieces la to Id, as members to be coupled, of the cloth stretching frame, and coupling members 2.
• the frame pieces la to Id each have hollow coupling parts 8 at opposite faces 6, that is, as shown in Fig. 3, the frame pieces la and lc made of aluminum define respectively upper and lower frames, and the frame pieces lb, Id define side frames, opposite surfaces 24 at opposite ends of each frame piece are formed into inclined surfaces at an angle of about 45 deg. so that each adjacent frame pieces la to Id are coupled together at a right angle.
• the frame pieces la to Id are extrusion-molded so as to have the following structure. That is, each of them has a cloth stretching bead part 5 on its front surface 3 at an outside position, a groove 7 extending from the outer surface 6 to the rear surface 40, collapsible concavities and convexities 8 formed on the inner surface of the groove 7 and adapted to be frictionally locked to a leg part 19 of a fixture 3. Further, the rear surface 40 has a projecting part 42 which is projected in a V-like cross-sectional shape so as to form a slope surface 41 continuous to the outer surface 6 of each of the frame pieces la to Id. That is, the slope surface 41 is inclined at angle of about 45 deg. to the outer surface 6, and is formed therein with the groove 7.
• a bead part 45 for cooperating with canvas stretching pliers 44 is formed on the rear surface 40 on the side remote from the outer surface 6, that is, on the inner surface 4 side, and is formed therein with suspender attaching holes (which is not shown) . Further, a cloth catching bead part 46 is formed on the slope surface 41 of the groove 7 on the outer surface 6 side.
• the widthwise size of the angular cross-sectional shape hollow coupling part 4 is set to be equal to a value which is obtain by subtracting a wall thickness from the entire width of the frame piece la at a position on the outer surface 6 side of the groove 7.
• angle shape concavities and convexities 15 circumferentially arranged and having collapsible crests are formed on two surfaces facing toward the outer surface 6 and the inner surface 43 and defined on the inner peripheral surface of the hollow coupling part 4.
• Reference numeral 47 is a channel.
• the coupling member 2 is formed from exclusion-molded hollow body which is cut into dimensions with which the coupling member 2 can be press-fitted in the hollow coupling part 4, and opposite ends, in cutting directions, of the coupling member 2 is insertable into the hollow coupling parts 4.
• the coupling member 2 in this embodiment is made of metal such as aluminum, and has an L-like shape, having a widths with which the coupling member 2 can be press-fitted in the entire width of the hollow coupling part 4, and concavities and convexities 22 arranged on the outer surface of the coupling member 2 in a direction from the bent part to the distal end, having collapsible crests.
• This coupling member 2 can be formed simply by cutting an exclusion-molded hollow body 18 having an L-like cross-sectional shape so as to have a predetermined longitudinal length. Further, in this embodiment, a reinforcing member 50 is provided in a bent part in a hollow part 49 of the coupling member 2, having opposite ends 2a, 2b are extended in a direction substantially orthogonal to opposite surfaces 55 serving as end faces of each of the frame pieces la to Id, and are flush with each other.
• the four coupling member 2 are interposed between the frame pieces la to Id, and then the frame pieces la to Id are knocked so that they are simultaneously assembled.
• the contact area becomes less, and accordingly, the coupling member 2 can be easily press-fitted into the hollow coupling part 4, and further, after the coupling member 2 is press- fitted in the hollow coupling part 4, the crests of the concavities and convexities 15, 22 are collapsed so as to ensure a large binding force.
• the fixture 3 is adapted to be pressed into the groove 7 so as to fix the cloth 18 such as a canvas stretched over the front surface of the cloth stretching frame, and has a leg part 9 which driven into the groove 7 breaking through the cloth 18 set on the frame piece la and the like, and is then press-fitted and secured in the groove 7, and a head part 20 for pressing the cloth on the outer surfaces of the frame pieces la to Id.
• the cloth 8 as shown in Fig.
• the leg part 19 of the fixture 3 is driven into the groove 7, breaking through the cloth 18 while the cloth 18 is pressed against rear surfaces 40 of the frame pieces la to Id and against the rear surfaces 40 of the frame pieces la to Id by the head part 20. Accordingly, the center side of the cloth 18 is stretched toward the peripheral edge thereof, and accordingly, the cloth 18 is flatly stretched, being supported on the cloth stretching bead 5. Further, since the concavities and convexities 8 are formed on the inner surface of the groove 7, the leg part 9 of the fixture 3 is easily frictionally locked only by press-fitting the fixture 3.
• the material of the fixture 3 is preferably softer than that of the cloth stretching frame 1. However, for example, if it is made of a material which is harder than that of the frame pieces la to Id, such as steel, it is locked while the crests of the concavities and convexities 8 are collapsed.
• reference numeral 57 denotes a suspender screwed in the suspender attaching holes formed in the bead part 45, and accordingly, the cloth stretching frame can be suspended on a wall surface by means of the suspender through the intermediary of a rope which is threaded through the suspender.
• 58 denotes a bar receiver to which one end part of the reinforcing bar (reference numeral 21 in Fig. 3) is attached.
• one end part 2a of the coupling member 2 in a cutting direction of a hollow body 48 is press-fitted in the hollow coupling part 4 of the frame piece la as a member to be coupled while the other end part 2b of the coupling member 2 is press-fitted in the hollow coupling part 4 of the frame piece lb, and accordingly, the frame pieces la and lb are coupled by the coupling member 2.
• the coupling member 2 is formed by cutting the exclusion-molded hollow body 48 so as to have dimensions with which the coupling member 2 can be press- fitted in the hollow coupling part 4, when the end part 2a of the coupling member 2 is press-fitted in the hollow coupling part 4, a resiliency can be more or less obtained from the hollow part 49 of the coupling member 2, and accordingly, it is possible to closely fit the coupling member 2 into the hollow coupling part 4 without no looseness, thereby it is possible to obtain a strong binding force. Further, the angle shape concavities and convexities 15, 22 are collapsed and meshed with each other so as to obtain also a strong binding force. Accordingly, it is possible to facilitate the coupling of the frame pieces la to Id.
• the hollow coupling part 4 has an angular cross-sectional shape, having the concavities and convexities 15 arranged circumferentially of the inner surface, and further, the coupling member 2 has an L-like shape, having the concavities and convexities 22 arranged on the outer surface thereof in a direction from the bent parts to ends. Accordingly, in addition to the coupling member 2, the frame pieces la and the like can be easily manufactured by exclusion-molding.
• the coupling member 2 includes the reinforcing member 50 in the hollow part 49 thereof, the strength of the coupling member can be increased, and accordingly, the wall-thickness of the coupling member 2 can be reduced.
• the members to be coupled are frame pieces la to Id which define respectively sides to the cloth stretching frame, having opposite end faces 55 which are inclined at an angle of substantially 45 deg so that the frame pieces are coupled together at a right angle, and since the opposite ends 2a, 2a of the coupling member 2 are inclined so that they are flush with each other in a direction substantially orthogonal to the opposite face 55, surfaces of the hollow body 48 corresponding to the opposite end parts 2a, 2b of the coupling member 2 are flush with each other, and accordingly, the cutting of the hollow body 48 can be stably, safely and easily made. Further, the opposite end parts 2a, 2b of the coupling member 2 are easily press-fitted in the hollow coupling parts 4.
• leg part 19 of the fixture 3 is frictionally locked to the concavities and convexities 8 in the groove 6 so as to be checked from coming off, the cloth 18 is retained and fixed to the rear surface 40 by the head part 20.
• the projecting part 42 is formed on the rear surface 40 of each of the frame pieces la to Id so as to obtain the slope surface 41 continuous to the outer surface 6 of each of the frame piece la to Id, and the groove 7 is formed in the slope surface 4a while the bead part 40 cooperated with the canvas stretching pliers is formed on the rear surface 40 on the side remote from the outer surface, the fixture 3 is hardly visible from the front side by forming the groove 7 in the slope surface 41, and accordingly, the appearance can be improved.
• the cloth 18 can be easily and fully fixed on the slope surface 41 by leverage action, and further, the bead part 45 to which the projecting support part 56 of the pliers 44 is supported is linearly projected. Accordingly, the position thereof is easily found so that the stretching of the cloth can be facilitated, and further, the fixture 3 can be easily fixed in the groove 7 in a condition in which the cloth 18 is stretched.
• the cloth stretching frame can be easily suspended on wall surface by means of a suspender 57 attached to the suspender holes.
• the cloth catching bead part 46 is formed on the slope surface 41 of the groove 7 on the outer surface 6 side, the cloth 18 can be caught on the cloth catching bead 46 by retaining the cloth 18 with the use of the head part 20 of the fixture 3 in the vicinity of the cloth catching bead part 46, and accordingly, the cloth can hardly slack while the head part 20 is hardly visible from the front side of the frame pieces la to Id due to the provision of the bead part 46.
• the coupling member 2 is formed so as to have a widthwise size with which the coupling member can be press-fitted in the entire width of the hollow coupling part 4 which is formed in a range obtained by subtracting the wall thickness from the entire width of the frame pieces la to Id, and accordingly, the looseness of the frame pieces la to Id can be easily suppressed.
• the angle shape concavities and convexities 15, 22 may be formed on at least either the frame pieces la to Id or the coupling member 2. Further, the concavities and convexities 15 may be formed on the inner peripheral surface of the frame piece la or the like, in its entirety or in part, and also the concavities and convexities 22 may be formed on the outer surface of the coupling member 2 in its entirety or in part.
• the coupling structure is used in each of the corner parts of the frame.
• a straight coupling can be used.
• it can be used as building materials for frames of windows, doors or the like.
• a painting cloth stretching frame in which an eight embodiment of the present invention is applied with reference to Fig. 4.
• This embodiment is similar to the seventh embodiment, except that a member 1 to be coupled as a frame piece has a recess or a hollow coupling part 4 at an end face, and a pin insertion hole 60 communicating the hollow coupling part 4 is formed at a side surface.
• the coupling member 27 has a recess 61 having a bottom without the hollow part 49, and the recess 61 has a barrel part 62. That is, the coupling part 2 is made of a material softer than that of the member 1 to be coupled, and has opposite end parts 2a, 2b serving as projecting parts adapted to be fitted in the hollow coupling parts 4.
• Concavities and convexities 33 as a one kind of protrusions having crests which resiliently makes contact with the associated opposite surface are formed on one opposed surfaces of the opposite end parts 2a, 2b, and further, caves 61 are formed at another opposite surfaces of end parts 2a, 2b in each of which the pin fitting barrel part 62 is provided at a position aligned with the pin insertion hole 60.
• the coupling member 2 is extrusion-molded of plastic materials such as thermoplastic resin (nylon 6, nylon 66 or the like) in which about 30 % of glass fibers is mingled so as to obtain an L-like shape in order to couple the frame pieces la to lb at the corner parts of the frame.
• both end parts 2a, 2b are tapered, and the concavities and convexities 22 have each a convex arcuate cross-sectional shape, and are extended in a direction orthogonal to the extending direction of the concavities and convexities 15 which are one kind of the protrusions, that is, in the widthwise direction of the coupling member, and are arranged toward the distal ends of the end parts 2a, 2b.
• the barrel part 62 has an oval shape longitudinally extending toward the distal end of each of the end parts 2a, 2b, and a plurality of beads 64 for inhibiting axial movement of the pin 63 are formed at an inner surface of the barrel part 62.
• the pin 63 is fitted in the barrel part 62 through the pin insertion hole 60. At this time, the pin 63 is clamped between the beads 64 so as to inhibit movement of the member to be coupled, absorbing dimensional errors and unevenness in degree of fitting of the end parts 2a, 2b into the hollow coupling part 4.
• the members 1 to be coupled are arranged in a frame-like pattern, and the coupling members 2 are interposed therebetween. They are pressed against one another in order to the coupling members 2 are pushed into and press-fitted in the members 1 to be coupled, and finally, the pins 63 are driven thereinto so as to assemble the cloth stretching frame.
• the coupling member 2 serving as the projecting parts
• the crests of the concavities and convexities 12, 14 constituting protrusions are made into resilient contact with the associated opposite surfaces.
• the coupling member 2 is made of a material softer than that of the members 1 to be coupled, the concavities and convexities 15 collapse the crests of the concavities and convexities 22 so as to effect close-contact coupling. Accordingly, the coupling member can easily be fitted in the members 1 to be coupled, and can hardly come off. Further, dimensional errors can be absorbed.
• the degree of difficulty in come-off can be determined a degree of fitting of the opposite end parts 2a, 2b into the hollow coupling part 4.
• the pin 63 is fitted in the barrel part 62, the coupling member 2 can more hardly come off from the members 1 to be coupled.
• the beads 64 are formed in the oval barrel part 62, the pin 63 can be clamped between the beads 64, dimensional unevenness can be absorbed, and further, unevenness in the degree of fitting of the coupling member 2 cal also be absorbed.
• the coupling member 2 is made of a plastic material which is softer than that of the members 1 to be coupled, thereby the manufacture of the coupling member 2 can be facilitated. It is noted that the concavities and convexities 15, 22 may be formed of a single protrusion or a bead.
• the coupling structure is applied a frames such as a window frame, and the members 1 to be coupled and the coupling member 2 are made of aluminum, having an equal hardness, and the members 1 to be coupled are formed of a rectangular pipe.
• the hollow end parts the members 1 to be coupled are formed therein with a recess 8, and several concavities and convexities 15 as one kind of protrusions having an angle-like cross-sectional shape with angle shape crests are formed on the inner surface of the recess 8 in the one opposed direction by a large number in the widthwise direction so that their beads are extended longitudinally of the members 1 to be coupled, and further, a pin insertion hole 60 communicated to the hollow coupling part 4 which is a recess is formed in one side surface of the hollow coupling part 4 in the other opposite direction.
• the end faces of the members 1 to be coupled are obliquely inclined at an angle of about 45 deg. so that four members 1 to be coupled are coupled together so as to form a rectangular frame.
• the members 1 to be coupled are longitudinally extrusion-molded.
• the coupling member 2 is made of a plastic material, having a L-like shape, and has hollow parts 49 communicated to the side surfaces of the opposite end parts 2a, 2b serving as the projecting parts. Further, a plurality of pairs of clamping pieces 67a, 67b for clamping a pin are projected from the inner surface of each of the hollow parts 49 at positions aligned with pin insertion holes 60, in directions orthogonal to each other.
• concavities and convexities 22 serving as angular cross-sectional shape protrusions having angular crests are formed on the outer surface of the coupling member 2, longitudinally of the opposite end parts 2a, 2b, by a large number, being extended widthwise so that they are opposed to the concavities and convexities 15, orthogonal to the latter.
• Concavities and convexities 22 ' having a shape similar to that of the concavities and convexities 22 are formed on the opposed surfaces of the clamping pieces 67a, 67b.
• Such a hollow parallelepiped coupling member 2 having an L-like shape can be cut so as to have a predetermined width after extrusion- molding, as indicated by the phantom lines shown in Fig. 15.
• Aluminum pegs, rivets or the like are used as pins 63 which are driven into gaps between the clamping pieces 67a, 67b through the pin insertion holes 60 with the use of a hammer in order to ensure the fixing of the coupling member 2 fitted in the members 1 to be coupled.
• both coupling member 2 and the members 1 to be coupled have an equal hardness so as to effect close-contact coupling.
• the pins 63 are clamped between the pairs of the clamping pieces 67a extending in the extending directions of the opposite end parts 2a, 2b, and between the pairs of the clamping pieces 67b extending in a direction perpendicular to the extending directions of the concavities and convexities 22.
• the pins 63 clamped between the clamping pieces 67a are completely checked from coming off.
• the pins 63 clamped between the clamping pieces 67b are effectively checked from coming off but can be pulled off due to the frictional locking.
• the concavities and convexities 15 extended in the longitudinal direction of the members 1 to be coupled are displaced by about 2 mm, and accordingly, a gap would be produced in the corner part of the members 1 to be coupled assembled in a rectangular frame shape.
• the pin 63 are driven into the pin insertion holes 96/31110 PC1 JP96/01671
• each of the pins 63 approaches the corner side or the inward side of the clamping pieces 67 (indicated by the solid lines shown in Fig. 6) , thereby it is possible to regulate the displacement by 2 mm.
• the diameter of the pin insertion hole 63 can be increased so that the pin 63 can be easily inserted.
• the pins 63 are aluminum pegs or rivets having a hardness equal to or less than that of the coupling member 2, and accordingly, it can be fixed by being collapsed by the concavities and convexities 22' . If the pins 63 have been pulled off, another new pin 63 can be used for reusing the coupling structure.
• concavities and convexities can be formed of a single protrusion or bead.
• a cloth stretching frame in a tenth embodiment of the present invention are shown in Figs. 17, 18. That is, this cloth stretching frame, in the seventh embodiment, another groove 7a in addition to a groove 6, is additionally formed in the outer surface 6 on the front end side, a folding-back and hooking piece 70 is provided, the cloth stretching bead part 5 is formed in such a shape that the end part of the frame piece la is folded back, and further, a bar receiver 58a for receiving an end part of a reinforcing bar 21 in its entirety, is extended.
• a groove-like cave 6a is formed in the outer surface of the frame piece la on the front end side, and a groove 7a is formed in the bottom surface of the cave 6a.
• Concavities and convexities 8 are formed on the inner surface of the groove 7a, similar to the groove 7,
• a side part 6b of the cave 6b is not perpendicular, has an inclined angles that it can be opened outward by an angle of about 160 deg.
• An edge part of the cloth (which is not shown) is folded back below the groove 7 at the rear surface of each of the frame pieces la to Id, and a folding-back and hooking piece 70 for folding back the cloth and as well for hooking onto a hook is extended.
• the edge part of the cloth (which is not shown) is folded back by the folding-back and the hooking piece 95, and a retainer (which is not shown) such as U-like shape clip is fitted onto the folding-back and hooking piece 95 so as to fix the edge part of the cloth.
• a hooking unit such a hook is attached on a wall surface, the folding-back and hooking piece 70 is hooked onto the hook or the like so as to suspend the cloth stretching frame.
• the cloth has not to have a size with which the cloth can extend the groove 7, thereby it is possible to save the cloth, and it is convenient for folding a canvas cloth into the four corners of the frame pieces la to Id.
• the outer periphery of the cloth stretching frame is preferably covered with an architrave in order to enhance the appearance.
• the edge part of the cloth stretched and fixed by the fixtures 3 is folded at the folding-back and hooking piece 70, and is then fixed to the folding-back and hooking piece 70 a retainer such as a clip.
• a retainer such as a clip.
• the appearance can be enhanced.
• the cloth stretching frame can be conveniently hooked to the wall surface.
• folding-back and hooking piece 70 may be provided on only the frame piece la serving as the upper frame.
• members 1 to be coupled in this coupling structure each has a hollow coupling part 4 as a recess at an end face 85, and concavities and convexities 15 serving as protrusions are formed on the inner surface of the hollow coupling part 4 while a pin insertion hole 74 communicated to the hollow coupling part 4, concavities and convexities 15 serving as protrusions are formed on the inner surface of the hollow coupling part 4, and an pin insertion ole 74 communicating to the hollow coupling part 4 is formed in a side surface.
• grooves 7, 7a are formed at two positions on the outer surface and the rear surface of the frame piece la as shown in Fig. 20, and several concavities and convexities 15 having beads longitudinally extended are formed on opposite side surfaces of the grooves 7, 7a.
• the hollow coupling part 4 is formed so as to have a large width which is about three- times as large as the thickness, and several concavities and convexities 15 serving as protrusions having an angle-like cross-sectional shape, having angular crests and longitudinally extended,are formed all over the inner peripheral surface thereof.
• a folding-back and hooking piece 70 is suspended in rear of the groove 7 on the rear surface side, an edge part of a cloth stretched and fixed in the groove 7 or 7a by the fixture 3 (refer to Fig. 3) is folded back at the folding-back and hooking piece 70, similar to the eleventh embodiment.
• suspending pieces 77 for attaching a bar 21 (refer to Fig. 2) is formed.
• the frame pieces lb to Id is also similar to the frame piece la.
• the folding-back and hooking piece 70 may be formed only on the frame piece la, and the suspender 77 is formed on each of only the frame pieces la, lc.These frame pieces la to Id are extrusion-molded of metal such as aluminum.
• the coupling member 2 has abutting parts 86 adapted to abut against end faces 85, at one end part, projecting parts 23, 24 adapted to be fitted in the hollow coupling parts 4 being projected from the abutting parts 86, and pin attaching parts 73 are formed in the projecting parts 23, 24 at position aligned with pin insertion holes 74.
• the coupling member 2 is extrusion-molded of a plastic material such as a thermoplastic resin in which about 30% of the glass fibers are mingled (nylon 6, nylon 66 and the like) .
• the coupling member has an L-like shape as view in a plan view, having grooves 7', 7a' continuous to one end parts of the continuous grooves 7, 7a, and several concavities and convexities 8' having beads extending depthwise are formed on opposite side surfaces of grooves 7', 7a' as shown in Fig. 22. Further, a cloth stretching bead part 5 ' continuous to the cloth stretching bead 5 is formed.
• the projecting parts 23, 24 corresponding to the opposite end parts 2a, 2b of the coupling member 2, and adapted to be fitted in the hollow coupling parts of the frame pieces la to Id are arranged being spaced from each other, concavities and convexities 22, 22a having beads extending widthwise are formed on the side surfaces of the projecting parts 23, 24, other than the opposed surfaces.
• the vertical length a and a lateral length b of a pair of projecting parts 23, 24 as viewed form the front surface 86 side, have relationship with the vertical length a' and the lateral length b' (refer to Fig. 20), that is, a > a', b > b' .
• the projecting part 23 is formed therein with a pion attaching part 73 into which a screw-like pin inserted in the pin insertion hole 74 of the frame piece 74 is tightened.
• the pin attaching part 73 can be tapped by the pin.
• a continuous suspending piece 77' continuous to the suspending piece 77 is formed, a continuous folding- back and hooking piece 70' continuous to the folding-back and hooking piece 70, and is formed therein a hooking hole 78.
• the coupling member 2 is made of synthetic resin.
• Reference numeral 79 denotes a recess for lightning in view of the formation.
• the frame pieces la to Id are arranged in a frame-like pattern, the coupling members 2 are interposed between the frame pieces la to Id which are then pushed together so as to press the coupling members 2 into the end parts of the frame pieces la to Id so as to be fitted therein.
• the hollow coupling parts 4 of the frame pieces la to Id and the projecting parts 23, 24 of the coupling members 2 are coupled together with the crests of the concavities and convexities 15 and the crests of the concavities and convexities 22 are made into press-contact with each other, only the crests of the concavities and convexities 22 are collapsed since the coupling members 2 are made of plastic material.
• the crests of the concavities and convexities 22a are also collapsed, being made into press- contact with the inner surfaces of the hollow coupling parts 4.
• the pins 73 are driven into the pin attaching parts 73 through the pin insertion holes 74, and accordingly, the coupling members 2 are checked from coming off from the frame pieces la to Id.
• the degree of difficulty in come-off of the coupling members 2 without the pins being driven into can be determined, depending upon a degree of fitting of the projecting parts 22, 23 into the hollow coupling parts 4.
• the coupling members 2 can be surely checked from coming off by attaching the pins to the pin attaching parts 73 through the pin insertion holes 74.
• grooves 7, 7a, 7', 7a' may be formed, being extended from the outer surfaces to the rear surfaces of the members 1 to be coupled and coupling members 2.
• the pins are screws, and the pin attaching parts 73 are threaded holes. Pins with no threads, may be press-fitted and fixed in holes or the like having protrusions formed on the inner surfaces of the pin attaching parts 73.
• the concavities and convexities 15, 22, 22a are formed on both members 1 to be coupled and the coupling members 2, they may be formed on only either one of them. Further, the coupling members 2 may be made of metal, together with the members 1 to be coupled. Further, if the hardness of the concavities and convexities 15, 22, 22 are identical or less, the crests of these concavities and convexities are collapsed, alternately, if these protrusions are harder, they wedge into the softer surface or protrusions.
• Fig. 23 shows a variant form of protrusions which are one of the concavities and convexities 15, 22, 22a, Fig.
• FIG. 23(a) illustrating an angle-like cross-sectional shape having a curved crest
• Fig. 23(b) illustrating a angle ⁇ like cross-sectional shape having an angle crest, and having moderate inclined surfaces.
• Reference numeral 81 shows an example of the crest 80 which has been collapsed.
• the concavities and convexities 22 or the like may be formed in a conical or pyramid-like shape, other than the bead-like shape, and can be spotted. In this case, the concavities and convexities 15, 22, 22a are arranged so as to exhibit a letter, a number, a symbol or the like.
• the pitches, the shape and dimensions of the concavities and convexities 15 are larger than those of the concavities and convexities 22.
• the former may be equal to or larger than the latter.
• the pitches of the concavities and convexities 15 may be small, or the pitches of the concavities and convexities 22 may be large.
• the embodiment shown in Figs. 23, 24 may be applied to the case in which the coupling member 2 and the members 1 to be coupled to be fitted therein with the coupling member 2 are made of aluminum. Further, it can be applied to the afore-mentioned all other embodiments, and embodiments mentioned below.
• a tewelveth embodiment of the present invention is shown in Fig.
• this coupling structure comprises a plurality of plate members 93, 93' having half-lap surfaces 90, 9a formed on at least either the rear surface side of one side part or the front surface of the other side part, and recesses 92 opposed with half-lap surfaces 90, 91 being superposed with the former half-lap surfaces 90, 91, and adapted to be half-lap joined, and coupling members 94 adapted to be fitted in the recess 92 between the half-lap surfaces 90, 91 of the plurality of plate members 93 , 93 ' .
• rise-up pieces 95 are provided inward of the recesses 92 between the half-lap surfaces 91, and the plate members 93, 93' are extrusion-molded.
• a water-tight packing 97 is interposed between the rise-up piece 95 and the inward end part 91a.
• attaching holes 96 into which attaching screws 95 are inserted are formed, and accordingly, the plate members 93, 93' are attached to a base (which is not shown) by the attaching screws 95.
• the concavities and convexities 15 are formed on the inner surface of the recesses 92.
• the coupling members 94 are formed of a substantially rectangular cross-sectional shape hollow body 98, having side parts outward convexly curved. Convexly curved surfaces 97 are formed on opposite side surfaces, and further, concavities and convexities 22 are formed on the outer surface, and the coupling members 94 are extrusion-molded and are cut at a predetermined length position 94a. It is noted that the crests of the concavities and convexities 15 on the recess side may be made to be large while the crests of the concavities and convexities 22 of the coupling members 94 may be made to be small, and accordingly, the coupling members 94 can be easily press-fitted.
• the crests of the concavities and convexities 22 may become higher and higher inward from the coupling side, and accordingly, the coupling members 94 can be more easily fitted in the recesses 92. Further, a more strong binding force can be held. Further, in this arrangement, the crests of the concavities and convexities 15 may become higher and higher toward the fitting side.
• FIG. 26 shows a section of a frame piece la, and a bar receiver 58 is projected in a direction inward of the cloth stretching frame, and a coupling hole 100 is formed in the bar receiver 58 while a reinforcing bar fixing groove 101 is formed in the inner surface 43 of the frame piece la as the cloth stretching frame. Further, the reinforcing bar fixing groove 101 are formed on its inner surface with concavities and convexities 15. The same arrangement is taken for other frame pieces lb to Id. These frame pieces la to Id are extrusion-molded.
• hollow coupling parts 4, grooves 7, concavities and convexities 15, recesses 34, cloth catching bead parts 46 and the like similar to those in the previously mentioned embodiment shown in Figs. 9 and 11.
• like reference numerals are attached to common parts.
• Fig. 27 shows a section of a reinforcing bar 21 formed on one side surface of an end part thereof with a thread hole 103 adapted to be aligned with the coupling hole 100, and formed on opposite sides, with side grooves 12 aligned with the reinforcing bar fixing groove 101. Further, the side grooves 12 are formed therein with the concavities and convexities 15.
• the reinforcing bar 21 is also extrusion- molded.
• Figs. 28 and 29 show a reinforcing bar coupling member 104 which are formed on the outer surface thereof with longitudinally arranged concavities and convexities 22.
• This reinforcing bar coupling member 104 is also formed by cutting an extrusion-molded strip-like body so as to have a predetermined length.
• Fig. 30 is an explanatory view for attachment of the reinforcing bar 21.
• One end part of the reinforcing bars 21 are made into contact with the bar receiver 58 and with inner surface 43, and the reinforcing bar coupling member 104 are pushed widthwise so as to be press-fitted in the side groove 102 as shown by the arrow Lj_ . Further, the reinforcing bar coupling member 104 is pushed longitudinally so as to be fitted in the reinforcing bar fixing groove 101.
• the a screw is inserted in the aligned holes and is then tightened into the thread hole so as to fix the reinforcing bar. Accordingly, it is possible to simply and surely attach the reinforcing bar.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Mutual Connection Of Rods And Tubes (AREA)
• Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
• Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)
• Floor Finish (AREA)
• Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
• Tents Or Canopies (AREA)

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• 1996
  • 1996-06-14 TW TW085107253A patent/TW383217B/zh not_active IP Right Cessation
  • 1996-06-17 AU AU60174/96A patent/AU708598B2/en not_active Ceased
  • 1996-06-17 CA CA002224243A patent/CA2224243C/en not_active Expired - Fee Related
  • 1996-06-17 CN CNB961949252A patent/CN1135177C/zh not_active Expired - Fee Related
  • 1996-06-17 KR KR10-2004-7002882A patent/KR100492811B1/ko not_active IP Right Cessation
  • 1996-06-17 WO PCT/JP1996/001671 patent/WO1996031110A2/en active IP Right Grant
  • 1996-06-17 BR BR9609494-0A patent/BR9609494A/pt not_active IP Right Cessation
  • 1996-06-17 KR KR1019970709270A patent/KR100500354B1/ko not_active IP Right Cessation
  • 1996-06-19 AT AT96109869T patent/ATE190564T1/de not_active IP Right Cessation
  • 1996-06-19 DE DE69607069T patent/DE69607069T2/de not_active Expired - Fee Related
  • 1996-06-19 EP EP96109869A patent/EP0749851B1/en not_active Expired - Lifetime
• 1997
  • 1997-12-19 MX MX9710502A patent/MX9710502A/es not_active IP Right Cessation

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