JPH11309921A - Buffer apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently exert a buffer effect to an impact without weakening a mechanical strength in a buffer apparatus which prevents the strong impact, e.g. when a hooked member falls off the hook and hits the other member. SOLUTION: A printer case 21 set at an electronic blackboard is constituted of a supporting case (fixed member) 24 and a paper storage case (movable member) 25. The paper storage case 25 is mounted rotatably to the supporting case 24 to open downward centering a support shaft 0. A belt-like coupling member 35 of thermoplastic urethane elastomer is hung between the cases 24 and 25. When the paper storage case 25 which is closed normally is opened, the coupling member 35 is stretched thereby stopping the opening of the paper storage case 25 and holding the case. The coupling member 35 is extended in a stretch direction by its strong elasticity and absorbs an impact at the time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door, for example, when the door is opened, the door hits another member with force, and when the latch is released, the member that has been hooked falls vigorously to another member. The present invention relates to a shock absorber that prevents a large impact from being hit.

[0002]

2. Description of the Related Art Conventionally, for example, in an electronic blackboard, usually, in order to save written contents on a board surface, the written contents are read, and the read contents can be recorded on a sheet by a printer.

As shown in FIG. 11, for example, the printer comprises a support case 2 for attaching a printer case 1 to a blackboard frame, and a paper storage case 3 which is attached to the support case 2 so as to be openable and closable.

Normally, as shown by a two-dot chain line in the figure, the paper storage case 3 is closed. For example, when paper supply or repair is performed, the latch is removed and the paper storage case is removed as shown by a solid line in the figure. Case 3 was opened.

However, when the paper storage case 3 is opened in such a printer, the paper storage case 3 is inadvertently opened.
When the latch is removed without putting a hand on the paper storage case 3, the paper storage case 3 drops vigorously and hits other members to damage the other members or the paper storage case 3 itself, break the support shaft O,
In some cases, the roll paper P jumped out.

Therefore, in a conventional printer of this type,
For example, an elastic band-shaped connecting member 4 is stretched between the support case 2 and the paper
Some have a low-cost cushioning device which stretches the connecting member 4 when opened to absorb the impact received by the paper storage case 3 by its elasticity.

[0007]

Incidentally, such a connecting member 4 has conventionally been made of polypropylene or nylon, or of natural rubber, chloroprene or silicon. However, for the former, the tensile strength
Although it has high mechanical strength such as tear strength, it has a problem that it can not absorb shocks sufficiently due to poor elasticity, and the latter, on the contrary, is rich in elasticity, but it is easy to cut due to poor mechanical strength was there. Therefore, an object of the present invention is to provide a low-cost shock absorber as described above that can obtain stable performance by using a connecting member having high mechanical strength and excellent elasticity.

[0008]

Therefore, a shock absorber according to the first aspect of the present invention includes a connecting member 35 made of a thermoplastic urethane elastomer and a connecting member 35 made of a thermoplastic urethane elastomer as shown in an embodiment described with reference to the following drawings. It is characterized by comprising a fixed member such as the support case 24 connecting one end of the connecting member 35 and a movable member such as a paper storage case 25 connecting the other end of the connecting member 35.

For example, when the movable member is dropped with the latch removed, the connecting member 35 made of a thermoplastic urethane elastomer is stretched to absorb the impact applied to the movable member by its elasticity.

According to a second aspect of the present invention, in the shock absorber of the first aspect, for example, as in an embodiment described with reference to the following drawings, the fixing member is formed by a support case 24 of a printer. It is characterized in that the movable member is formed by a paper storage case 25 provided to be able to open and close with respect to the support case 24.

When the paper storage case 25 is opened, the connecting member 35 absorbs the impact that the paper storage case 25 receives.

According to a third aspect of the present invention, in the shock absorber according to the first aspect, a hole is formed in one of the fixed member and the movable member as in an embodiment described with reference to the following drawings. The connecting member 35 is provided in the hole 34 thereof.
And a step 35a is provided at one end, and the connecting member 35 is passed through the hole 34 so that the step 35a is
4, one end of the connecting member 35 is connected to the edge of the connecting member 35,
It is characterized by the following.

When connecting one end of the connecting member 35 to the fixed member or the movable member, the connecting member 35 is passed through the hole 34 and the step 35a is hung on the edge of the hole 34.

According to a fourth aspect of the present invention, in the shock absorber according to the first aspect, as in an embodiment described with reference to the following drawings, for example, the cushioning device is extended between the fixed member and the movable member. It is characterized in that a stopper member 40 for regulating the amount of extension of the connecting member 35 is provided.

When the impact is absorbed by the elasticity of the connecting member 35, the extension of the connecting member 35 by a certain degree or more is restricted by the stopper member 40.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 is an external perspective view of an electronic blackboard provided with the shock absorber according to the present invention.

This electronic blackboard has a rectangular flat blackboard body 10 that stands upright and is movably supported by a stand 11 with casters.

The blackboard body 10 has a front window 12 in front of FIG.
a of the front window 1
Endless seat 1 stretched from left to right inside from 2a
3 and a writing surface S is formed thereon. An operation panel 14 having a copy switch and the like is provided on one side edge of the outer frame case 12.

The stand 11 has vertical columns 15
The lower reinforcement frame 16 is bridged between the lower ends of the vertical pillars 15 and 15 and the upper reinforcement frame is bridged between the upper ends (not shown in FIG. 5). Then, a bracket 18 is fixed to one end of the upper reinforcing frame 17 shown in FIG. 6, and an elongated pen tray 19 is attached along the lower edge of the outer frame case 12 to the left front side of the bracket 18 in the drawing. A thermal printer 20 is attached to the side.

When the above-described electronic blackboard is used, characters, pictures, and the like are written on the writing surface S using a writing instrument.

When making a copy of the written contents, the copy switch on the operation panel 14 is operated to convey the endless sheet 13, and the written contents on the sheet 13 are read by an optical reading device (not shown). Is output to the thermal printer 20, and while the read content is reduced and recorded on the roll paper P stored in the printer 20, the recorded portion is discharged.

Incidentally, the above-described thermal printer 20
As shown in FIGS. 1 and 2, an upper support case (fixing member) 24 for fixing the substantially box-shaped printer case 21 to the bracket 18 and a lower paper storage case (movable member) 25 And formed. Then, the paper storage case 25 is rotatably attached to the support case 24 so as to open downward about the support shaft O, and can be freely opened and closed between an open position shown in FIG. 1 and a closed position shown in FIG. Thus, the paper storage case 25 is normally closed by a suitable locking means (not shown).

As shown in FIG. 2, the support case 24 has a shape covering the upper surface side of the paper storage case 25 and the right rear side in the figure, and has a thermal head 28 on the left front side in the figure. On the other hand, on the back side opposite to the thermal head 28,
Attachment pieces 24a are provided on both sides in the width direction.

The paper storage case 25 is provided at its bottom with a paper storage recess 25a having a substantially semi-cylindrical cross-section, in which the roll paper P is placed and stored, and the roll paper P is stopped and held by the regulating member 33. Become. Further, on the left front plate portion 25b in the figure, an elongated discharge port 31 is provided in the horizontal direction, and an upper edge of the discharge port 31 is formed in a blade shape, and a cutter portion 25c is provided. Further, a platen 32 is provided beside the sheet discharge port 31, and the thermal head 28 is pressed against the platen 32 by the urging spring 27 from above with the paper drawn from the roll paper P interposed therebetween.

In the paper storage case 25, on the rear side of the upper end edge 25d of the paper storage concave portion 25a, convex portions 25e are formed on both sides in the width direction, and holes 34 vertically penetrating in FIG. . Then, a belt-shaped connecting member 35 is stretched between the paper storage case 25 and the support case 24.

The connecting member 35 is made of a thermoplastic urethane elastomer having a urethane group in its molecular structure by reacting, for example, polyester polyol or polyether polyol with diisoacinate.

The thermoplastic urethane elastomer is formed into a sheet by extrusion molding, for example.
Further, the sheet material is formed into a strip shape by punching. Thus, as shown in FIG. 3, one end is formed in a T shape having a step 35a, and the other end is provided with a screw hole 35b. Then, as shown in FIG. 4, the connecting member 35 is passed through the hole 34 of the paper storage case 25 from the other end, a step 35 a is hung on the hole edge, and the other end is
4 to the mounting piece 24a.

Now, the above-described thermal printer 20
It is used with the paper storage case 25 closed. At this time, as shown in FIG.
25 so that it is folded in two.

At the time of recording, the platen 32 is rotated to sequentially pull out the roll paper P, the read content is recorded on the roll paper P by the thermal head 28,
Discharged from Then, the recording portion of the roll paper P is cut using the cutter 25c.

On the other hand, for example, when replenishing roll paper or cleaning the inside of the paper storage case 25, the paper storage case 25 is opened. In this case, for example, the locking means is removed by putting a hand on the paper storage case 25, and the paper storage case 25 is rotated downward from the closed position by gravity.

Then, as shown in FIG. 1, the connecting member 35 is changed from the folded state to the straight-over state, and the opening of the paper storage case 25 is stopped and held. However, when opening the paper storage case 25 and unintentionally removing the locking means without touching the hand, the paper storage case 25 pivots vigorously. It absorbs the shock at that time.

On the other hand, after supplying roll paper, etc.,
When closing the paper storage case 25, the paper storage case 25 is turned upward while being lifted by hand. Then, the connecting member 35 is loosely bent in the shape of a letter, and the paper storage case 25 is returned to the original closed position in FIG. 2 and stopped by the locking means.

In the cushioning device according to the present invention, as shown in FIG. 7, together with the connecting member 35, a stopper member 40 for restricting the elongation of the connecting member 35 to a certain degree or more is similarly provided. It is good to be provided in a manner to be bridged between them.

The stopper member 40 is made of a resin such as polyethylene or polypropylene, and is formed, for example, in a belt shape. And it is formed at least longer than the connecting member 35 and shorter than the length extended to the elastic limit. Further, one end is made slightly wider, a fixing piece 40a is formed there, and a screw hole is made at the other end.

Then, the stopper member 40 and the connecting member 35 are respectively passed through the holes 34, and the other ends thereof are overlapped and fixed to the mounting piece 24a with screws 36. The connecting member 35 hangs a step 35a at one end thereof on the edge of the hole 34, and the stopper member 40 bends and fixes the fixing piece 40a to the inner surface side of the paper storage recess 25a of the paper storage case 25.

As shown in FIG. 8, when the paper storage case 25 is closed, the stopper member 40, together with the connection member 35, is folded between the two cases 24 and 25.

On the other hand, when the paper storage case 25 is opened, as shown in FIG.
Stretches in the stretching direction due to elasticity and absorbs shock. However, when the paper storage case 25 is opened, when the paper storage case 25 is strongly pushed down by an external force such as being strongly pressed by a hand, and the connecting member 35 extends to near the elastic limit, the connecting member 35 is stopped by the stop member 40. Is further restricted, and the opening of the paper storage case 25 is stopped.

The stop member 40 is not limited to a resin as described above, but may be a metal chain or the like. The shape of the stop member 40 is not limited to a band, but may be other shapes such as a string. You may.

The shape of the connecting member 35 is not limited to a band, but may be a line or a string. Further, in order to increase the mechanical strength such as tensile strength, it is also possible to use a wide shape or a thick shape.

Further, the connecting member 35 can be used in a state of being overlapped with two to increase the mechanical strength. In that case, for example, two connecting members may be overlapped, or one connecting member may be used by overlapping two. In the latter case, for example, as shown in FIG. 10, one belt-shaped connecting member 35 is passed through the hole 34 of the paper storage case 25 and folded in two, and both ends are screwed into the mounting piece 24 a of the support case 24.
6 may be stopped.

[0041]

Thus, according to the first and second aspects of the present invention, the connecting member between the fixed member and the movable member is provided with adequate elasticity and sufficient mechanical strength such as tensile strength and tear strength. Since it is made of a thermoplastic urethane elastomer, it is possible to effectively absorb the impact that the movable member receives when the movable member is dropped, for example, after the latch is removed, without causing a problem such as breaking or tearing.

According to the third aspect of the present invention, one end of the connecting member can be easily connected to the fixed member or the movable member simply by passing the band-shaped connecting member through the hole and hanging the step at one end on the edge of the hole. be able to.

According to the fourth aspect of the present invention, the stopper is provided between the fixed member and the movable member so as to restrict the elongation of the connecting member by a certain degree or more. Can be more reliably prevented.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view showing a thermal printer of an electronic blackboard provided with a buffer device according to the present invention with its paper storage case opened.

FIG. 2 is a longitudinal sectional view showing the thermal printer with a paper storage case closed.

FIG. 3 is a plan view showing a connecting member for connecting the paper storage case and the support case.

FIG. 4 is a perspective view showing the connecting member in a state of being bridged between a paper storage case and a support case.

FIG. 5 is an external perspective view of an electronic blackboard provided with the thermal printer.

FIG. 6 is a partial side view showing a printer mounting portion of the electronic blackboard as viewed from the side.

FIG. 7 is a perspective view of another example of the shock absorber according to the present invention, showing a connecting member and a stopper member in a state of being bridged between a paper storage case and a support case.

FIG. 8 is a longitudinal sectional view showing a thermal printer in another example with a paper storage case closed.

FIG. 9 is a longitudinal sectional view showing the thermal printer with a paper storage case opened.

FIG. 10 is a perspective view showing another example of the connection member in a state where the connection member is bridged between the paper storage case and the support case.

FIG. 11 is a longitudinal sectional view showing a conventional thermal printer of an electronic blackboard provided with a shock absorber, with its paper storage case opened.

[Explanation of symbols]

 24 Support Case (Fixed Member) 25 Paper Storage Case (Movable Member) 34 Hole 35 Connecting Member 35a Step 40 Stopper Member

Claims (4)

[Claims] 1. A shock absorber comprising a connecting member made of a thermoplastic urethane elastomer, a fixed member connecting one end of the connecting member, and a movable member connecting the other end of the connecting member. 2. The shock absorber according to claim 1, wherein the fixed member is formed by a support case of the printer, and the movable member is formed by a paper storage case provided to be openable and closable with respect to the support case. 3. A hole is formed in one of the fixed member and the movable member, the connecting member is formed in a band shape passing through the hole, and a step is provided at one end, and the connecting member is passed through the hole and the step is formed. A part is hung on the edge of the hole and one end of the connecting member is connected,
The shock absorber according to claim 1. 4. The shock absorber according to claim 1, further comprising a stopper member that extends between the fixed member and the movable member and regulates an amount of expansion of the connecting member.