JP6534144B2 - Magnet screen device - Google Patents

Description

  The present invention relates to a magnet screen apparatus, and more particularly to a magnet screen apparatus for magnetically attaching a screen main body to a magnetic object while drawing out the screen main body.

  A variety of portable magnet screen devices have been proposed which allow the screen body to be expanded from the storage case when necessary and magnetically attached to a magnetic subject such as a blackboard or a white board so that an image can be projected onto the screen body. ing.

  Many of the portable magnet screen devices thus far have magnetically attached to a magnetic object such as a blackboard after the screen body is pulled out of the storage case. As a result, the screen body may be wrinkled or loosened, or a defect may occur due to its own weight.

  In order to eliminate such a problem, a screen device has been proposed which magnetically attaches to a magnetic object while delivering the screen main body (for example, Patent Document 1). However, even with such a screen device, due to the wrinkles of the screen main body generated while being taken up by the shaft member, the problem that both widthwise end parts curl when the screen main body is pulled out and expanded It is not suppressed.

  Therefore, for example, in Patent Document 2, it is proposed that the screen main body be wound on a roll member with the magnet surface side inside and that the curling of the end in the width direction be suppressed when the screen main body is pulled out and expanded. There is. Further, in Patent Document 2, a portion close to the winding roll of the screen main body pulled out from the storage case is pressed with a long member, and a portion close to the winding roll can also be magnetically attached to the magnetic object.

JP, 2016-38475, A JP, 2016-167025, A

  In the screen device of Patent Document 2 in which the screen main body is magnetically attached to the magnetic attachment body while drawing out the screen main body, the screen main body is pulled out and wound although the wrinkles and slack of the screen main body are magnetically suppressed when magnetically attached to the magnetic attachment body. Since there is a gap between the elongated member and the magnetic object when it is taken out, it is considered that wrinkles and slackness of the screen main body can not be completely prevented.

  The present invention has been made in view of such conventional problems, and its object is to provide a magnet screen apparatus for magnetically attaching to a magnetic object while drawing out the screen main body, without causing wrinkles or slack in the screen main body. An object of the present invention is to provide a magnet screen device which can be pulled out and wound up.

  Another object of the present invention is to prevent curling of both end portions in the width direction when the screen main body is expanded.

  A magnet screen device according to the present invention for achieving the above object has a storage case, a take-up roll rotatably attached to the storage case, and a screen layer and a magnet layer, and is wound around the take-up roll. And a holding member attached to the storage case, the storage case having an opening longer than the width of the screen main body for pulling out and winding the screen main body, The pressing member is provided such that a part thereof protrudes outward from the opening of the storage case, and the screen main body is pulled out while being pressed by the magnetic object by the pressing member and is wound. I assume. In the present specification, "the width of the screen main body" refers to the length from one end to the other end of the screen main body in the direction orthogonal to the drawing direction of the screen main body.

  In the magnet screen device having the above configuration, it is preferable that the pressing member be rotatably attached to the storage case.

  Further, in the magnet screen device having the above configuration, it is preferable that the length in the width direction of the pressing member is set to be longer than the width of the screen main body.

  In the magnet screen device having the above configuration, the surface on the magnet layer side at one end in the winding direction of the screen main body is joined to the winding roll, and the screen main body is wound with the magnet layer side as the inner side. It is preferable that it is the structure wound up by roll shape at roll.

  Further, in the magnet screen device having the above configuration, when the screen main body is drawn out from the storage case and stretched, the pressing member faces the screen main body to the magnetic adherend at a position away from the magnetic adherend. It is preferable to be configured to press down.

  According to the magnet screen device of the present invention, the screen main body can be magnetically attached to the adherend without wrinkles or slack. Also when winding up, the screen main body can be wound up on the winding roll without causing wrinkles or slackness.

It is a whole perspective view showing one embodiment of a magnet screen device concerning the present invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG. It is a perspective view of a cap member. It is a perspective view of the width direction one side which shows the state by which the winding-up roll and the holding | suppressing roll are supported by the storage case by the cap member. It is a perspective view of the width direction other side which shows the state which the winding-up roll and the holding | suppressing roll are supported by the storage case by the cap member. It is a front view which shows the process of magnetically attaching a magnet screen apparatus to a blackboard. It is the BB sectional drawing of FIG.

  Hereinafter, the present invention will be described in more detail based on the drawings, but the present invention is not limited to these embodiments.

(Configuration of magnet screen device)
FIG. 1 is an overall perspective view showing an embodiment of a magnet screen apparatus S according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. In the magnet screen device S shown in these figures, the storage case 1 long in the width direction, the take-up roll 2 rotatably mounted in the storage case 1, and the rear end portion in the drawing direction are joined to the take-up roll 2 It has a screen main body 3 which is taken up by the take-up roll 2, a fixing bar 4 joined to a leading end of the screen main body 3 in the pull-out direction, and a pressing roll (pressing member) 5.

  The storage case 1 has a substantially cylindrical case main body 11 whose both widthwise end portions are open, and a pair of cap members 12 a and 12 b for closing the opening of both widthwise end portions of the case main body 11. The case body 11 is formed with an elongated opening 13 which is open over the entire width. A space 14 capable of storing the winding roll 2 in which the screen main body 3 is wound is secured inside the case main body 11, and from the space 14 to the opening 13 in a cross section perpendicular to the width direction shown in FIG. It has a shape in which the width in the height direction is reduced. On the lower side surface in the height direction of the case main body 11 to be in contact with the magnetized object, a shallow concave portion 15 having a rectangular cross section is provided continuously in the width direction. A permanent magnet 16 having a thickness equal to or less than the depth of the recess 15 is attached to the recess 15 at a predetermined interval in the width direction. As a result, the storage case 1 can be fixed by the permanent magnet 16 without rattling at any position of the magnetic support such as the blackboard. Of course, the permanent magnet 16 may be provided in the entire width direction of the recess 15. In the present embodiment, as described later, when attaching the pair of cap members 12 a and 12 b to the case main body 11, the positioning projections 126 (shown in FIG. 3) of the cap members 12 a and 12 b are concave portions 15. The permanent magnet 16 is not provided in this portion because it is engaged at both widthwise end portions of the.

  FIG. 3 shows a perspective view of the cap member 12a. In addition, since a pair of cap members 12a and 12b have left-right symmetrical shape, only the structure of one cap member 12a is demonstrated here. The cap member 12 a has a cap body 120 having an outer shape that is substantially the same as the cross-sectional shape perpendicular to the width direction of the case body 11. On an inner side surface of the cap body 120, a first boss 121 for supporting the take-up roll 2, a plurality of ribs 122 formed at equal intervals in the circumferential direction on the outer periphery of the first boss 121, and a plurality of A cylindrical rib 123 connected to the radially outer end of the rib 122, a second boss 124 for supporting the pressing roll 5, and two through holes 125a formed at substantially symmetrical positions with respect to the first boss 121. 125b, and a plate-like positioning protrusion 126 formed below the first boss 121.

  The take-up roll 2 has a cylindrical shape that is long in the width direction, and a biasing force is always applied in a direction in which the screen main body 3 is taken up by a built-in spring (not shown). In use, the screen body 3 is pulled out of the storage case 1 against the biasing force of the spring. At both end portions in the width direction of the winding roll 2, support shafts 21 (shown in FIG. 2) that protrude outward through the axial center of the winding roll 2 are provided. Then, as described later, the take-up roll 2 is rotatably attached to the storage case 1 by the support shaft 21 being engaged with the first bosses 121 of the pair of cap members 12a and 12b.

  The screen main body 3 has a rectangular shape in plan view, has the screen layer 31 on the surface side in use, and has the magnet layer 32 on the back side in use (see the enlarged view in FIG. 2). Of course, other layers such as a coat layer may be provided outside the screen layer 31 and the magnet layer 32. The rear end of the screen body 3 in the pull-out direction is joined to the take-up roll 2. Specifically, the surface (rear surface side) on the magnet layer 32 side at the rear end portion in the pull-out direction of the screen main body 3 is joined to the winding roll 2. As a result, the screen main body 3 is rolled up on the winding roll 2 with the magnet layer 32 side as the inner side, and the curling of the end in the width direction when the screen main body 3 is pulled out from the storage case 1 and expanded is suppressed Be done.

  The fixing bar 4 is joined to the leading end of the screen main body 3 in the pulling direction. The length in the width direction of the fixing bar 4 is longer than that of the screen main body 3 and is substantially the same as that of the storage case 1. A permanent magnet 41 is attached to the outer surface of the fixing bar 4 in contact with the magnetized object. The fixing bar 4 can be fixed to a magnetic object such as a blackboard by the permanent magnet 41. Further, when the screen main body 3 is taken up in the storage case 1, the fixing bar 4 can not enter into the storage case 1 from the opening 13, and the fixing bar 4 is the opening 13 of the storage case 1. The winding of the screen main body 3 is completed by contacting the peripheral edge of the screen.

  The pressing roll 5 has a cylindrical shape, and the length in the width direction is set to be equal to or longer than the length of the screen main body 3, and the outer diameter of the pressing roll 5 is set shorter than the length in the transverse direction of the opening 13 of the storage case 1. ing. A part of the outer peripheral surface of the pressing roll 5 protrudes outward from the opening 13 and is exposed. At both end portions in the width direction of the pressing roll 5, support shafts 51 (shown in FIG. 2) protruding outward through the axial center of the pressing roll 5 are provided. Then, as described later, when the support shaft 51 is engaged in the second boss 124 of the pair of cap members 12a and 12b, the axial center of the holding roll 5 is parallel to the axial center of the winding roll 2 and stored. It is rotatably attached to the case 1. If the diameter of the pressing roll 5 is smaller, the magnet screen device S can be reduced in size and weight, but if the diameter is extremely small, the pressing roll 5 may be bent in the width direction. The preferred diameter of the pressure roll 5 is in the range of 10 mm to 20 mm. Further, the cross-sectional shape of the pressing roll 5 may not be circular, and may be non-rotatably attached, but the pressing roll 5 and the screen main body 3 when pulling out and winding the screen main body 3 from the storage case 1 From the viewpoint of reducing the friction between the pressing roll 5 and the pressing roll 5, it is desirable that the cross-sectional shape of the pressing roll 5 be circular and be rotatable.

  As shown in FIG. 2, the distance L between the axial center of the take-up roll 2 and the axial center of the pressing roll 5 in the drawing direction of the screen main body 3 is preferably in the range of 30 mm to 45 mm. When the distance L is in the above range, it is possible to suppress the bending deterioration and the wear of the screen main body 3 by the pressing roll 5 while suppressing the enlargement of the device. Further, the distance D from the magnetic attachment body to the lower end of the pressing roll 5 when the storage case 1 is magnetically attached to the magnetic attachment body is preferably in the range of 3 mm to 5 mm. When the distance D is within the above range, when the screen main body 3 is pulled out from the storage case 1 and magnetically attached to the magnetic attachment body, the screen main body 3 is magnetically attached to the magnetic attachment until the position near the takeup roll It can be worn while maintaining smooth winding and pulling of the screen main body 3 to the storage case 1.

(assembly)
Next, the assembly of the magnet screen device S will be described. FIGS. 4 and 5 are perspective views showing a state in which the winding roll 2 and the pressing roll 5 are supported by the storage case 1 by the pair of cap members 12a and 12b. In FIG. 4 and FIG. 5, in order to make it easy to understand the supported state, a part of the case main body 11 is removed.

  First, the take-up roll 2 and the pressing roll 5 are inserted into the case main body 11 from the end in the width direction. Next, the support shaft 21 of the take-up roll 2 is engaged with the first boss 121 of the pair of cap members 12 a and 12 b, and the support shaft 51 of the pressing roll 5 is engaged with the second boss 124. At the same time, the positioning projections 126 of the pair of cap members 12a and 12b are engaged with the recess 15 of the case main body 11 to position the cap members 12a and 12b. , 12b. At this time, the through holes 125a and 125b (shown in FIG. 3) of the cap members 12a and 12b and the screw holes 17a and 17b (shown in FIG. 2) of the case main body 11 overlap each other. Then, screw members 18a and 18b (shown in FIG. 1) are inserted into the through holes 125a and 125b of the cap members 12a and 12b and screwed into the screw holes 17a and 17b of the case main body 11 to make the cap members 12a and 12b the case. Screw on the main body 11.

(How to use)
The use procedure of the magnet screen apparatus S of the said structure is demonstrated based on FIG.6 and FIG.7. FIG. 6 is a front view showing a process of magnetically attaching the magnet screen device S to the blackboard MB as a magnetic attachment body, and FIG. 7 is a cross-sectional view taken along the line B-B of FIG. Note that the vertical direction, the horizontal direction, and the paper surface depth direction in FIG. 6 are the vertical direction, the horizontal direction, and the height direction of the device.

  The magnet screen device S of the present invention is portable, and can carry the handle 17 in the storage state in which the screen main body 3 is taken up by the storage case 1. Then, first, the fixing bar 4 is magnetically attached to a desired position of the blackboard (magnetic object) MB, and then the screen main body 3 is pulled out and magnetically attached to the blackboard MB while moving the storage case 1.

  6 (a) and 7 (a) are state diagrams in which the magnet screen device S is magnetically attached to the blackboard MB by the permanent magnets 16 and 41. FIG. Here, the attachment position of the magnet screen device S on the blackboard MB is a predetermined position, that is, the position at the right end when the screen main body 3 is expanded.

  Next, as shown in FIGS. 6 (b) and 7 (b), the storage case 1 is moved in the left direction. By moving the storage case 1, the screen main body 3 is pulled out of the storage case 1 and sequentially magnetically attached to the blackboard MB. At this time, in the conventional magnet screen device, the screen main body 3 is magnetically attached to the black board MB by relying only on the magnetic force of the magnet layer 32 of the screen main body 3 and the black board MB. Could get into the air and cause wrinkles and slack. On the other hand, in the magnet screen device S of the present invention, a part of the pressing roll 5 protrudes outward from the opening 13 of the storage case 1. The storage case 1 is moved in a state where the storage case 1 is inclined with respect to the blackboard MB so that the pressing roll 5 protruding outside from the opening 13 presses the screen main body 3 pulled out from the storage case 1 against the blackboard MB. As a result, the drawn screen body 3 is magnetically attached while being pressed by the press roll 5 against the blackboard MB, so that air is less likely to enter between the screen body 3 and the blackboard MB, and generation of wrinkles and slack is prevented. Ru. In addition, the moving direction is corrected so that the moving direction of the storage case 1 becomes a direction orthogonal to the width direction. The inclination angle of the storage case 1 with respect to the blackboard MB is an angle range in which the peripheral edge of the opening 13 of the case main body 11 does not contact the screen main body 3 and the blackboard MB and only the pressing roll 5 contacts and presses the screen main body 3.

  Then, as shown in FIGS. 6 (c) and 7 (c), when the screen main body 3 is pulled out to a desired length W, the storage case 1 is returned to the original state and the storage case 1 is removed by the permanent magnet 16. Fix it on the blackboard MB. At this time, as described above, if the distance D (shown in FIG. 2) between the lower end in the height direction of the pressing roll 5 and the blackboard MB is in the range of 3 mm to 5 mm, the screen main body 3 Can be magnetically attached to the blackboard MB, and a wide projection possible range can be secured. Although the drawing length W varies depending on the width direction length of the screen main body 3, it is usually at most about 1.5 m.

  The winding of the screen main body 3 to the storage case 1 after use is performed in the reverse procedure of the above-described pull-out procedure. That is, from the state in which the screen main body 3 in FIG. 6C and FIG. 7C is drawn out and expanded, as shown in FIG. 6B and FIG. The screen main body 3 is wound around the winding roll 2 by moving it in the direction of the fixing bar 4 in the inclined state. At this time, since the distance between the pressing roll 5 and the winding roll 2 is short and the screen main body 3 between the rolls is stretched, the screen main body 3 can be fixed to the winding roll 2 without shifting or slack in the width direction. It is taken up. Then, when the screen main body 3 of FIGS. 6A and 7A is stored in the storage case 1, the winding is completed. Thereafter, if necessary, the magnet screen device S is removed from the blackboard MB against the magnetic force of the permanent magnets 16 and 41 and moved to another place. As described above, since the biasing force is always applied to the screen main body 3 in the direction taken up by the spring (not shown) of the take-up roll 2, the screen main body 3 is stored unless an external force is applied in the pulling direction. Maintain the state.

(Others)
In the embodiment described above, the screen main body 3 is wound on the winding roll 2 with the magnet layer 32 side on the inside, but may be wound on the winding roll 2 with the screen layer 31 on the inner side. However, in the case of such a configuration, there is a possibility that both end portions in the width direction may curl up when the screen main body 3 is expanded by the crease while being taken up by the take-up roll 2. A configuration in which the winding roll 2 is wound up with the side inside is recommended.

  In the embodiment, the length in the width direction of the pressing roll 5 is equal to or larger than the width of the screen main body 3, but the length in the width direction of the pressing roll 5 may be smaller than the width of the screen main body 3. For example, a plurality of pressing rolls 5 shorter than the width of the screen main body 3 may be provided so as to press both widthwise end portions of the screen main body 3 and, if necessary, the widthwise central portion.

  In the embodiment shown in FIGS. 6 and 7, the storage case 1 is moved in the left-right direction to pull out and wind the screen main body 3. However, the storage case 1 is moved in the vertical direction to move the screen Of course, the main body 3 may be pulled out and wound up. Alternatively, the storage case 1 may be moved in an oblique direction to pull out and wind the screen main body 3.

  According to the magnet screen device S of the present invention, the screen main body 3 can be magnetically attached to the magnetic target MB such as a blackboard without wrinkles or slack, and also when wound up, the screen main body 3 has wrinkles or slack. It is possible to be taken up on the take-up roll 2 without being produced, which is useful.

S Magnet screen device 1 Storage case 2 Take-up roll 3 Screen main body 4 Fixing bar 5 Holding roll (pressing member)
DESCRIPTION OF SYMBOLS 11 Case main body 12a, 12b Cap member 13 Opening part 15 Recess 16 Permanent magnet 17 Handle 21 Support shaft 41 Permanent magnet MB Black board (magnetic object)
121 first boss 122 rib 123 rib 124 second boss 125 a, 125 b through hole 126 protrusion

Claims (4)

With storage case,
A take-up roll rotatably mounted on the storage case;
A screen body having a screen layer and a magnet layer and wound up by the winding roll;
And a pressing member attached to the storage case,
The storage case has an opening longer than the width of the screen body for pulling out and winding the screen body,
The pressing member is provided such that a part thereof protrudes outward from the opening of the storage case,
The screen main body is pulled out and wound while being pressed by the magnetic object by the pressing member.
When the screen main body is pulled out from the storage case and stretched, the pressing member holds the screen main body toward the magnetic adherend at a position separated from the magnetic adherend at a position wider than the thickness of the screen main body. The magnet screen apparatus characterized by attaching.   The magnet screen device according to claim 1, wherein the pressing member is rotatably attached to the storage case.   The magnet screen device according to claim 1, wherein a length in a width direction of the pressing member is set to be longer than a width of the screen main body. The surface on the magnet layer side at one end of the screen main body in the winding direction is joined to the winding roll,
The magnet screen device according to any one of claims 1 to 3, wherein the screen body is wound in a roll shape on the winding roll with the magnet layer side as the inner side.