JP4931743B2 - Sheet spreading device - Google Patents

Description

  The present invention relates to a sheet expanding apparatus, and more particularly to a sheet expanding apparatus for fixing an internal lighting signboard, awning, or other sheet to a frame in a tension state.

  As a configuration for stretching a soft sheet used for signboards, decorative tents, etc. in a tensioned state in a frame, what has been generally implemented is that the edge of the sheet is folded back and eyelets are provided at the folded part This is fixed to the frame through a rope. Also, a method of obtaining a tension state by gripping the edge portion of the sheet with a number of grippers and attaching and tightening the edge portion to the frame by a screw mechanism is being adopted. However, these methods require processing such as sewing in advance on the edge of the sheet, or complicated work for coupling the sheet and the gripping tool. As an attempt to solve these problems, various extension fittings have been proposed, and an example thereof is described in Patent Document 1.

  FIG. 6 shows an example in which an interior lighting signboard is configured by a translucent sheet 2 made of a soft resin being stretched on a frame 1 in a tension state. Reference numeral 3 denotes a frame portion constituting the four sides of the rectangular frame 1. As shown in FIG. 7, the end of the sheet 2 is attached to the frame 1 by a stretching device 4. As shown in the drawing, a plurality of expansion devices 4 are provided along the four sides of the frame body 1 on the back side of the frame portion 3 constituting the four sides of the rectangular frame body 1.

  FIG. 8 shows the detailed structure of each spreading device 4 described in Patent Document 1. The frame 1 is composed of an angle material, the main body of the frame 1 is composed of the large angle material 11, and the attachment side 13 for the expansion device 4 is composed of the small angle material 12.

  In the expansion device 4, reference numeral 14 denotes a support member, which is constituted by an aluminum extruded product. The support member 14 includes a hook-shaped covering portion 15 that can cover the attachment side 13 of the small angle member 12 of the frame body 1, a bolt support portion 16 that protrudes forward from the frame body 1, and a guide portion 17. However, it is the structure formed integrally. The guide portion 17 is configured to be disposed along the attachment side 13 of the small angle member 12. The bolt support portion 16 is formed with a hole portion 19 through which the bolt 18 is passed.

  In the expansion device 4, reference numeral 21 denotes a housing member, which is constituted by an aluminum extruded product. In this accommodating member 21, a groove 22 having a rectangular cross section, a bolt screw fitting portion 23 into which the bolt 18 is screwed, and a guided portion 24 arranged along the guide portion 17 of the support member 14 are integrally formed. It is the structure which was made.

  In the expansion device 4, reference numeral 26 denotes a fitting member, which is similarly formed of an aluminum extruded product. The dimensions of the support member 14, the accommodating member 21, and the fitting member 26 along the direction perpendicular to the paper surface of FIG. 8 will be described. As simply shown in FIG. 7, the support member 14 and the accommodation member 21 are configured so that, for example, the dimensions in the same direction are about several centimeters. On the other hand, the fitting member 26 is configured to have a size of, for example, 10 centimeters or more so that the dimension in the same direction is larger than the dimensions of the support member 14 and the accommodating member 21.

  The fitting member 26 is formed in an L-shaped cross section. The end 5 of the sheet 2 can be fixed to the accommodating member 21 by being firmly fitted into the groove 22 together with the end 5 of the sheet 2 in a state where the end 5 of the sheet 2 is wound as illustrated. Reference numeral 27 denotes one side of the L-shaped fitting member 26, and the one side 27 is fitted into the groove 22. Reference numeral 28 denotes the other side of the L-shaped fitting member 26, and when the one side 27 is fitted into the groove 22, it is configured to overlap the edge 29 of the portion of the housing member 21 where the groove 22 is formed.

  The one side 27 is formed in a V-shaped cross section, and is configured such that a thick main body 31 and an elastic body 32 thinner than the main body 31 are integrally formed. When the side 27 is fitted into the groove 22, the portion connecting the main body 31 and the elastic body 32 is located on the bottom side of the groove 22, and the main body 31 and the elastic body 32 are separated from each other. The open portion is configured to be located in a shallow portion of the groove 22.

  In such a configuration, when one side 27 of the fitting member 26 is fitted into the groove 22 of the housing member 21 in a state where the end portion 5 of the sheet 2 is wound, the elastic body portion 32 is deformed in a direction in which the V shape is closed. As a result, the end portion 5 of the sheet 2 is strongly pressed against the inner surface of the groove 22 by the elastic body portion 32 and is securely fixed. Further, in such a fixed state, one side 27 of the fitting member 26 is formed in a V-shaped cross section, so that the elastic body portion 32 prevents the one side 27 from slipping out of the groove 22. By pushing the inner surface, it is possible to keep a fixed state. Further, the end portion 5 of the sheet 2 is sandwiched between the other side 28 of the fitting member 26 and the edge portion 29 of the housing member 21, and thereby a more secure fixed state is maintained.

  The bolt 18 is provided in the direction of the surface of the sheet 2. For this reason, by operating the bolt 18 and moving the accommodating member 21 in a direction approaching the bolt support portion 16 of the support member 14 covered so as to be hooked on the attachment side 13 of the small angle member 12 of the frame 1, The sheet 2 can be tensioned by applying tension to the sheet 2. At this time, the fitting member 26 is pushed into the groove 22 together with the end portion 5 of the sheet 2 based on the tension of the sheet 2, and between the other side 28 of the fitting member 26 and the edge portion 29 of the accommodating member 21. As a result, the sheet 2 is securely held in the stretching device 4 in a tension state, and as a result, the occurrence of looseness in the sheet 2 is effectively prevented.

  On the contrary, the tension of the seat 2 can be relaxed by operating the bolt 18 and moving the accommodating member 21 away from the bolt support portion 16.

  At this time, the guided member 24 of the accommodating member 21 slides along the guide portion 17 of the supporting member 14, for example, so that the accommodating member 21 can be moved smoothly.

As shown in FIG. 8, the expansion device 4 is covered with the frame portion 3 formed of a plate material. Therefore, as shown in FIG. 6, the expansion device 4 does not appear on the appearance of the signboard.
JP-A-6-51704

  However, the configuration shown in FIG. 8 has the following problems. That is, even if the elastic body portion 32 on one side 27 of the fitting member has elasticity, a slight plastic deformation is caused by being pushed into the groove 22. If it does so, the pressing force to the inner surface of the groove | channel 22 will fall easily.

  Further, when the sheet 2 is stretched, a plurality of stretching devices 4 have to be operated. However, in some stretching devices 4, there are cases where the seat 2 cannot be satisfactorily stretched only by operating the bolts 18. At that time, it is necessary to remove the fitting member 26 from the groove 22 together with the end portion 5 of the sheet 2, change the winding position of the sheet 2 around the fitting member 26, and then perform the fitting again. Such re-insertion is often performed many times until the adjustment is completed. As a result, a deformation force is repeatedly applied to the elastic body portion 32, and plastic deformation is likely to occur.

  Further, since the end portion 5 of the sheet 2 is wound around the fitting member 26, when the sheet 2 is stretched, the sheet 2 acts to tighten the fitting member 26 by the tension. As a result, the elastic body portion 32 is likely to be deformed.

  When the elastic body portion 32 is deformed in this way, the force for holding the end portion 5 of the sheet 2 is reduced, and the sheet 2 is likely to be loosened. In this case, the fitting member 26 needs to be replaced. There is a problem of becoming.

  Further, since one side 27 of the fitting member 26 is formed in a V-shaped cross section, the apex portion of the V-shape is easily moved in the lateral direction at the bottom of the groove 22. When such movement occurs, because the tension is acting on the sheet 2, the other side 28 of the fitting member 26 is easily lifted from the edge 29 of the housing member 21. The pinching force of the edge portion 5 of the sheet 2 by the edge portion 29 may be reduced, and the sheet 2 may be loosened.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve such problems and to make it possible to securely tension a sheet by a stretching device.

In order to achieve this object, an apparatus for tensioning a sheet to a frame body according to the present invention includes a support member attached to the frame body, and a housing provided with a groove for housing an end portion of the sheet. The sheet is fitted in the state where the sheet end is wound around the groove, and the sheet is fixed to the sheet by adjusting the position of the fitting member that fixes the end to the groove and the accommodating member with respect to the support member. And a tension applying means for pushing the fitting member into the groove together with the end of the sheet based on the tension of the sheet , a protrusion is provided on the fitting member, and an elastic tongue piece is provided on the housing member, the resilient tongue, when fitting the member fitting in a state where the sheet edge is wound in the groove, together with those to be displaced by the projection of the fitting member is fitted When the wood is fitted into the groove, and returns from the displacement state to the original state, when using the deployed device, a state where the force from the fitting member does not act, towards the said sheet and the protrusion on the opening side of the groove The position is restricted so that it does not move.

  With such a configuration, the elastic tongue piece does not press the fitting member against the inner surface of the groove, and after the fitting member is fitted into the groove, it returns to its original state and is not deformed. Therefore, there is an advantage that the sheet is not always deformed when the stretching device is used, and therefore the sheet is not loosened based on the decrease in the pressing force.

  Even if it is necessary to repeatedly insert and remove the fitting member to adjust the stretched state of the sheet, the elastic tongue only elastically deforms when the projection passes, so that plastic deformation does not occur, Therefore, it can endure repeated use.

  Even when the end of the sheet is wound around the fitting member, the elastic tongue is not formed on the fitting member, so that the sheet winding force does not act on the elastic tongue. For this reason, there exists an advantage that a deformation | transformation does not arise in an elastic tongue piece with a sheet | seat.

  The elastic member is not provided on the fitting member, and therefore it is not necessary to form the fitting member in a V shape, thus preventing the loosening of the sheet due to the lateral movement of the V-shaped top portion in the groove. can do.

  Therefore, there is also an advantage that no elastic force is reduced in the elastic tongue piece, and there is no need to replace the member based thereon.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a stretching apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5 and the same members as those shown in FIGS.
1 to 5, an elastic tongue 41 is integrally formed at a position corresponding to the inner surface of the groove 22 of the housing member 21 that is far from the stretched surface of the sheet 2. The elastic tongue piece 41 is close to the extending surface of the sheet 2 in the groove 22 from the main body portion 42 formed so as to be directed from the position outside the groove 22 toward the groove bottom, and from the front end of the main body portion 42. It is the structure which has integrally the front-end | tip hook part 43 formed in the direction which goes to the inner surface of one side.

  One side 27 of the fitting member 26 is formed in a rectangular cross section in accordance with the cross sectional shape of the groove 22. A projection 44 is formed on one side 27 of the fitting member 26 at a position corresponding to the elastic tongue 41 when the fitting member 26 is fitted into the groove 22. The surface on the groove bottom side of the protrusion 44 is formed as an inclined surface 45 whose height gradually decreases toward the groove bottom side. On the other hand, the surface on the groove opening side of the protrusion 44 is formed as an end surface 46 facing the opening side of the groove 22.

  As shown in detail in FIG. 2, in the fitting member 26, the surface facing the groove inner surface near the stretched surface of the sheet 2 and the surface facing the edge 29 of the housing member 21 are accommodated in the housing member 21. A minute unevenness 47 for preventing the sheet 2 from being displaced when the sheet 2 is sandwiched between the member 21 and the member 21 is formed.

  In such a configuration, when the sheet 2 is stretched, the end 5 of the sheet 2 is placed along the fitting member 26 as shown in FIG. 3A, and the sheet 2 is fitted as shown in FIG. 3B. The fitting member 26 is fitted into the groove 22 of the housing member 21 in a state of being wound around the member. When the fitting member 26 is inserted into the groove 22 at a certain depth, the projection 44 and the portion of the sheet 2 that covers the projection 44 approach the tip catch portion 43 of the elastic tongue 41.

  Therefore, as shown in FIG. 3C, a suitable tool 48 such as a pliers is used to sandwich the accommodating member 21 and the fitting member 26, and a force is applied in a direction in which the fitting member 26 enters the groove 22. Then, the inclined surface 45 of the protrusion 44 of the fitting member 26 and the sheet 2 at that portion act so as to push the elastic tongue piece 41 through the front end catching portion 43 of the elastic tongue piece 41. That is, the elastic tongue piece 41 is elastically deformed to allow the fitting member 26 provided with the protrusion 44 to move toward the inner side of the groove 22 and to be stuck into the groove 22 in a pressed state. Thereafter, the elastic tongue 41 returns to the original undeformed state.

  At this time, when the projection 44 passes through the position of the tip catching portion 43, the operator knows sensibly that the operation of fitting the fitting member 26 into the groove 22 is completed by the sound and response at that time. Can do.

  1 and 2 show a state in which the fitting member 26 is pushed and held in the groove 22 together with the end portion 5 of the sheet 2 in this manner. In this state, the elastic tongue piece 41 regulates the position so that the sheet 2 and the protrusion 44, that is, the fitting member 26, do not move toward the opening side of the groove 22. That is, when the pull-out force from the groove 22 acts on the fitting member 26, the end surface 46 of the protrusion 44 presses the front end hanging portion 43 of the elastic tongue piece 41 via the sheet 2, so that the pull-out is prevented. .

  When the sheet 2 is stretched by operating the bolt 18 as the tension applying means shown in FIG. 1, the fitting member 26 is pushed into the back side of the groove 22 by the tension of the sheet 2, so that the sheet 2 is securely held. The At this time, a large force does not act on the elastic tongue piece 41 from the fitting member 26.

  FIG. 4 shows an example of use of the stretching device 4 shown in FIGS. 1 and 2.

  As shown in FIG. 5, when the sheet 2 is thin, it can be fitted into the groove 22 together with the one side 27 of the fitting member 26 in a state where the necessary portion of the front end portion 5 is folded double or more than twice. it can. In this case, even when the sheet 2 is thin, a gap is generated between the groove 22 and the fitting member 26 and the sheet 2, so that the fitting member 26 is inclined. Occurrence of a situation in which the side 28 is lifted from the edge 29 of the housing member 21 and the force for sandwiching the end 5 of the sheet 2 is reduced can be reliably prevented.

  As described above, the elastic tongue 41 is not always deformed when the expansion device 4 is used, and therefore, there is an advantage that the sheet 2 is not loosened due to a decrease in its function.

  Even when it is necessary to repeatedly insert and remove the fitting member 26 into and out of the groove 22 in order to adjust the stretched state of the sheet 2, the elastic tongue piece 41 is only elastically deformed when it passes through the projection 44, so that plastic deformation occurs. Therefore, it can withstand repeated use. When removing the fitting member 26 and the sheet 2 from the groove 22 from the state shown in FIGS. 1 and 2, the fitting member 26 and the accommodating member 21 are relatively displaced in a direction perpendicular to the paper surface of FIGS. Just do it. That is, the fitting member 26 and the accommodating member 21 may be slid in the lateral direction and removed from the groove 22.

  Further, since the winding force of the sheet 2 does not act on the elastic tongue piece 41, there is an advantage that the elastic tongue piece 41 is not deformed by the winding force.

  Therefore, the elastic tongue 41 does not drop in elastic force, and it is possible to eliminate the need for replacement of members based on it.

  Further, one side 27 of the fitting member 26 is formed in a rectangular shape in cross section, so that it can be fitted into the groove 22 exactly and does not move and tilt in the lateral direction inside the groove 22. For this reason, the other side 28 of the fitting member 26 does not lift from the edge 29 of the housing member 21, and the occurrence of loosening of the sheet 2 due to the occurrence of such lifting can be prevented.

  In addition, the material of the frame 1, the support member 14, the accommodating member 21, and the fitting member 26 can be selected as appropriate. For example, a hard resin or the like can be used instead of the above-described aluminum.

1 is a cross-sectional view of a sheet stretching apparatus according to an embodiment of the present invention. It is an enlarged view of the principal part of the sheet | seat extension apparatus of FIG. It is a figure which shows the method of fixing a sheet | seat to the extending | stretching apparatus of FIG. It is a figure which shows the usage example of the sheet | seat extension apparatus of FIG. It is a figure which shows the modification of the sheet extending apparatus of FIG. It is an external view of the internal lighting signboard which can use the sheet extending apparatus of this invention. It is a figure which shows the internal structure of the signboard. It is sectional drawing of the conventional sheet | seat extension apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame 2 Sheet | seat 5 End part 14 Support member 18 Bolt 21 Housing member 22 Groove 26 Insertion member 41 Elastic tongue piece 44 Protrusion

Claims (1)

An apparatus for stretched under tension the sheet to the frame, a support member attached to the frame, a housing member having a groove for receiving an end portion of the sheet, the sheet edge in the groove By adjusting the position of the accommodating member that fits in the wound state and fixes the end portion in the groove and the position of the accommodating member with respect to the support member, the sheet is given a predetermined tension and based on the tension of the sheet A tension applying means that pushes the fitting member into the groove together with the end portion of the sheet , the protrusion is provided on the fitting member, and an elastic tongue piece is provided on the housing member, and the elastic tongue piece is provided on the sheet in the groove. when fitting the member fitting in a state where the end portion is wound together with those to be displaced by the projection of the fitting member, when the fitting member is fitted into the groove, Returns from serial displacement state to the original state, when using the deployed device, a state where the force from the fitting member does not act, and the sheet with protrusions intended to position regulating immovably toward the opening side of the groove A sheet spreading device characterized by being.

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