JPH0577150U - Recording paper holding structure of recording device - Google Patents

Abstract

(57) [Summary] [Purpose] The operation of mounting recording paper is easy and the burden on the operator can be reduced, and rattling due to wear can be prevented. [Structure] A protrusion 20 is provided on one end surface of a bobbin 4 attached to a roll-shaped recording paper 2. By forming the bobbin holding member 5 that holds the bobbin main body 4A of the bobbin 4 in a J shape in a side view, the tip end of the lower horizontal portion 5B serves as the bobbin receiving base 24, and the bobbin main body is placed on the receiving base 24. 4A is placed and inserted into the holding groove 7. The bobbin positioning mechanism 10 includes a positioning block 21 and a leaf spring 2 facing each other.
2 and the leaf spring 22 biases the bobbin 4 in the axial direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a recording paper holding structure of a recording device for recording a desired image on roll-shaped recording paper.

[0002]

[Prior Art]

 Conventionally, as a recording paper holding structure of this type arranged in a recording paper stock portion of a recording apparatus, a structure configured as shown in FIGS. 4 and 5 is known. In this recording paper holding structure 1, a bobbin 4 made of metal, resin or the like is attached to the opening end of the central hole 3 of the roll-shaped recording paper 2, and the bobbin 4 is rotatably held by a bobbin holding member 5. Then, the bobbin 4 is locked by the lock arm 6. The bobbin 4 is formed of a cylindrical bobbin main body 4A made of brass, an annular projection 4B for positioning which is also formed of brass, and which is protruded from the longitudinal intermediate portion of the outer peripheral surface of the bobbin main body 4A, and is made of polyacetal resin. The bobbin main body 4A is integrally provided with a flange portion 4C and a cylindrical fitting portion 4D provided on one end side of the bobbin main body 4A, and the fitting cylindrical portion 4D is provided in the center hole 3 of the roll-shaped recording paper 2. Mated. The bobbin holding member 5 is made of a metal member such as aluminum, and is composed of a U-shaped block in a side view, so that the bobbin holding member 5 has upper and lower horizontal portions 5A and 5B facing each other in parallel in the vertical direction. A vertical portion 5C for connecting the rear ends of the horizontal portions 5A, 5B is integrally provided, and the space surrounded by these forms a holding groove 7 for rotatably storing and holding the bobbin body 4A. A positioning groove 8 into which the above-mentioned positioning annular projection 4B is inserted is continuously formed on the facing surfaces of the upper and lower horizontal portions 5A and 5B and the inner surface of the vertical portion 5C. The lock arm 6 is provided on one side of the bobbin holding member 5 so as to be rotatable in the vertical direction, and is provided at the tip end portion by imparting a turning tendency to the clockwise direction in FIG. 4 by a spring (not shown). The triangular locking claws 9 are hooked on the bobbin body 4B to prevent the bobbin body 4A from slipping out of the holding groove 7.

The bobbin main body 4A inserted into the holding groove 7 is provided with back tension (resistance tension) by the bobbin positioning mechanism 10 so that the recording paper 2 does not rotate due to slight vibration or the like. .. The bobbin positioning mechanism 10 presses the pressing element 11 against the upper surface of the collar portion 4C by the force of the spring 12 to increase the frictional force between the bobbin body 4A and the lower horizontal portion 5B, thereby providing back tension.

[0004]

[Problems to be solved by the device]

 By the way, there are various sizes of the roll-shaped recording paper 2, and the handling becomes important especially when the roll-shaped recording paper 2 has a large size. In other words, when it comes to recording papers of A0 to A1 size, the width is long and the weight is heavy, so that it requires a great deal of labor to mount it on the apparatus. Therefore, in handling such a large and heavy recording paper, it has been desired to simplify various operations such as positioning and mounting. However, in the above-described conventional recording paper holding structure 1, when mounting the recording paper 2, the positioning annular projection 4B is aligned with the positioning groove 8 and the bobbin body 4A is inserted into the holding groove 7 from the front. Since the operator must hold the heavy recording paper 2 by hand until the insertion is completed, there is a problem that the physical burden is large. In addition, the positioning of the bobbin 4 by the positioning annular projection 4B and the positioning groove 8 has a problem that when both or one of these is worn, axial play occurs.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to easily attach the recording paper and reduce the burden on the operator. Another object of the present invention is to provide a recording paper holding structure for a recording apparatus capable of reducing backlash due to abrasion.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a recording paper holding structure of a recording apparatus according to the present invention has a fitting portion at one end of a bobbin main body and a convex portion at the other end surface thereof, and an opening at both ends of a roll-shaped recording paper. A pair of left and right bobbins attached by fitting the fitting portions to each other, a pair of left and right bobbin holding members that hold the bobbin main body of each bobbin, and a pair of lock arms that lock each bobbin to the bobbin holding member. And a bobbin positioning mechanism that positions the bobbin at a predetermined position, the bobbin is formed of a resin member, and each bobbin holding member, the lock arm, and the bobbin positioning mechanism are formed of a metal member. Are formed in a J shape in a side view by upper and lower horizontal portions that face each other in parallel in the vertical direction and a vertical portion that connects one end of each of these horizontal portions. The bobbin positioning mechanism is disposed on the side of one bobbin holding member so that the convex portion of one bobbin abuts against it. It has a positioning block that is in contact with it, and a long hole that is arranged on the side of the other bobbin holding member facing this block and into which the protrusion of the other bobbin is inserted and engaged. It is composed of a biasing spring member.

[0007]

[Action]

 In the present invention, the bobbin receiving part extending in the lower horizontal part guides the bobbin to the holding groove. The bobbin is held at a predetermined position by the bobbin holding mechanism, the lock arm, and the bobbin positioning mechanism, and back tension is applied.

[0008]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. 1 is an external perspective view showing an embodiment of a recording paper holding structure of a recording apparatus according to the present invention, and FIG. 2 is a side view of one bobbin holding member. In the figure, the same components as those in FIGS. 4 and 5 are designated by the same reference numerals. In these drawings, the bobbin 4 is provided with a protrusion 20 which is integrally formed of resin and a protrusion 20 which is provided in the center of the end face of the bobbin main body 4 on the side opposite to the collar 4C instead of the positioning annular protrusion. Unlike the conventional bobbin, the fitting portion 4D (FIG. 4) is fitted at each opening end of the center hole of the recording paper 2.

The bobbin holding member 5 is formed in a J shape in a side view, so that the upper horizontal portion 5A, the lower horizontal portion 5B that faces the upper horizontal portion 5A in parallel, and both horizontal portions 5A and 5B. A vertical groove 5C connecting the rear ends of the bobbin main body 4A has a holding groove 7. The lower horizontal portion 5B is formed to be longer than the upper horizontal portion 5A, so that the tip end portion extending forward of the upper horizontal portion 5A forms the bobbin receiving portion 24.

The bobbin positioning mechanism 10 for positioning the bobbin 4 is composed of a positioning block 21 and a leaf spring 22 which are arranged on both sides of the left and right bobbin holding members 5, 5 so as to face each other. The positioning block 21 is fixedly arranged on a side plate 25 arranged on the outer side of the bobbin holding member 6 on one side (the right side in FIG. 1), and a step portion 26 is provided on the surface facing the plate spring 21 over the entire width direction. Is formed. When the bobbin 4 on one side is attached to the bobbin holding member 6 on the one side, the step portion 26 supports the protruding portion 20 thereof. The leaf spring 22 is formed in a rectangular shape that is long in the front-rear direction, has a long hole 28 that guides the protrusion 20 of the bobbin 4, and has a front end outside the bobbin holding member 5 on the other side (left side in FIG. 1). It is fixed to the inner side surface of the other side plate 29 arranged, and the plate portion from the front end side to the rear end of the elongated hole 28 is arranged with a proper gap from the side plate 29 so that the elasticity in the direction of the positioning block 21 is increased. The bobbin 4 has a force, and the bobbin 4 is urged in the axial direction by this elastic force to press the projection 20 against the positioning block 21, and the back tension is given by the friction between them.

The lock arm 6 is formed in an inverted L shape in a side view, so that the lock arm 6 is in contact with the outer surface of the vertical portion 5C of the bobbin holding member 5 and the front portion along the outer surface of the upper horizontal portion 5A. A horizontal arm portion 6B extending integrally with the vertical arm portion 6A, and a longitudinal middle portion of the vertical arm portion 6A is rotatably supported by a shaft 30 projecting from the vertical portion 5C, and a spring 31 is provided. 2 The rotation habit is imparted in the counterclockwise direction, that is, in the direction of engaging with the bobbin 4. Further, the locking claw 9 provided at the tip of the horizontal arm portion 6B is an inverted triangle having a sloped surface 9a whose front surface is inclined at a predetermined angle downward to the right in FIG. 2 and a vertical surface 9b, and which is vertical. The distance from the surface 9b to the vertical portion 5C is set to be substantially equal to the diameter of the bobbin body 4A. In this structure, the vertical arm 6A is restricted in its turning habit by a stopper 32 provided at a lower portion of an outer surface of the vertical portion 5C. The stopper 32 is arranged at a position where the vertical groove 9b applies a pressing force to the bobbin main body 4A held by the holding groove 7. In other words, the lock arm 6 is arranged so that back tension is applied to the bobbin 4A.

Next, the operation of mounting the recording paper in the recording paper holding structure having such a configuration will be described in detail with reference to FIGS. 2 and 3. First, holding the recording paper by hand, the bobbin main bodies 4A of the left and right bobbins 4, 4 are placed on the bobbin cradle portions 24 of the left and right bobbin holding members 5, 5 as shown in FIG. Next, the bobbin main body 4A is moved rearward along the upper surface of the bobbin receiving part 24 (FIG. 3 (a)), inserted into the holding groove 7 and brought into contact with the vertical part 5C (FIG. 3 ( b)) Then, the work of mounting the recording paper 2 is completed.

At the time of this insertion operation, a part of the peripheral surface of the bobbin main body 4A hits the inclined surface 9a of the locking claw 9 and pushes it up, so that the lock arm 6 is rotated clockwise against the spring 31 and held. The groove 7 is opened to allow the bobbin body 4A to be inserted into the holding groove 7. When the bobbin main body 4A passes below the locking claw 9 and is completely inserted into the holding groove 7, the lock arm 6 is rotated and returned by the force of the spring 31, and the vertical surface 9b of the locking claw 9 is rotated. The bobbin body 4A is prevented from coming out of the holding groove 7 and back tension is provided by pressingly engaging the front side peripheral surface of the bin body 4B.

When the bobbin main body 4 A is inserted, the protrusion 20 of one bobbin 4 moves along the step 26 (FIG. 1) of the positioning block 21, and the protrusion 20 of the other bobbin 4 moves. Is inserted into the elongated hole 28 of the leaf spring 22 to move, and the free end of the leaf spring 22 presses the end surface of the bobbin main body 4A toward the positioning block 21.

Here, if the bobbin main body 4A is placed on the bobbin receiving base 24 and then inserted into the holding groove 7, the time for holding the recording paper 2 can be reduced and the operator's meat can be reduced. The physical burden can be reduced, and since the bobbin 4 can be slid along the upper surface of the bobbin receiving part 24 in the axial direction, the lateral positioning work is also easy. Further, since the bobbin positioning mechanism 10 urges the bobbin 4 in the axial direction, even if the bobbin main body 4A or the projection 20 is worn, unlike the conventional mechanism shown in FIGS. 4 and 5, there is no backlash in the axial direction. It has the advantage that it can be prevented.

[0016]

[Effect of the device]

 As described above, according to the recording paper holding structure of the recording apparatus of the present invention, the operation of loading the rolled recording paper is easy, the physical burden on the operator can be reduced, and even if the bobbin wears. This has the effect of reducing backlash in the axial direction.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of a recording paper holding structure of a recording apparatus according to the present invention.

FIG. 2 is a side view of a bobbin holding member.

3 (a) and 3 (b) show a state in which the bobbin is being mounted,
It is a figure which shows the state after mounting.

FIG. 4 is an exploded perspective view showing a conventional example of a recording paper holding structure.

FIG. 5 is a sectional view of the mechanism.

[Explanation of symbols]

 2 Roll-shaped recording paper 3 Center hole 4 Bobbin 4A Bobbin body 4D Fitting part 5 Bobbin holding member 5A Upper horizontal part 5B Lower horizontal part 5C Vertical part 6 Lock arm 7 Holding groove 9 Locking claw 10 Bobbin positioning mechanism 20 Projecting part 21 Positioning Block 22 Leaf Spring 24 Bobbin Support 28 Long Hole

Claims (1)

[Scope of utility model registration request] 1. A pair of left and right bobbins each of which has a fitting portion at one end of a bobbin main body and a convex portion at the other end surface thereof, and which is attached to openings at both ends of the roll-shaped recording paper by fitting the fitting portions. A pair of left and right bobbin holding members for holding the bobbin main body of each bobbin, a pair of lock arms for locking each bobbin to the bobbin holding member, and a bobbin positioning mechanism for positioning the bobbin at a predetermined position, wherein the bobbin is made of resin. Each of the bobbin holding members, the lock arm, and the bobbin positioning mechanism is formed of a metal member, and each bobbin holding member has upper and lower horizontal portions that face each other in parallel in the vertical direction, and both horizontal portions. By being formed in a J shape in a side view with a vertical portion connecting one ends, the holding member is rotatably supported by one side surface portion of the holding member and its upper end portion is forwardly moved. The bobbin positioning mechanism is biased, and the bobbin positioning mechanism is provided on one bobbin holding member side and a positioning block on which the convex portion of one bobbin abuts, and the bobbin positioning mechanism is provided on the other bobbin holding member side facing the block. And a spring member which has a long hole into which the protrusion of the other bobbin is inserted and engaged and which biases and urges the bobbin in the block direction.