JP2957505B2 - Cylinder cleaning waste push-in prevention body buried in cylinder gap and its burying tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push-in prevention body suitable for preventing cleaning wastes from being pushed into a cylinder gap of a blanket cylinder or the like of an offset rotary printing press when cleaning a cylinder, and the push-in prevention body. The present invention relates to a tool used for embedding a body in a cylinder gap.

[0002]

2. Description of the Related Art In an offset printing machine, in order to prevent ink from solidifying on a blanket when changing a printing original and when finishing printing,
Alternatively, in order to wash and remove stains such as paper dust and ink remaining on the blanket when printing is continued for a certain period of time (hereinafter referred to as “washing waste”), the blanket is cleaned with a washing apparatus as shown in FIG. It is widely practiced to automatically clean. In the case of cleaning in an offset printing press, in particular in an offset rotary printing press, the cleaning dirt on the surface of the blanket wiped by the cleaning cloth is pushed into the cylinder gap. The cleaning waste once pushed in, in the subsequent printing process, jumps out of the cylinder gap again and adheres to the paper surface of the printed matter, causing a problem of deteriorating the quality of the printed matter.

As one of the countermeasures, Japanese Utility Model Application Laid-Open No. 58-15
No. 5249 discloses a technique in which an elastic member, in particular, a rubber projection is integrally provided on a blanket, and this is positioned in a cylinder gap. In Japanese Patent Publication No. 7-380, a cylinder having a specially shaped elastic gap bridge is used. Techniques for closing the gap have been proposed. In particular, in a web offset press for newspaper printing, as shown in FIG. 25, a cylinder gap 16 having an opening having a width of about 10 mm and a length of 800 mm (length when the newspaper is opened) is provided in two stages. ing.

[0004] In this type of offset rotary printing press, printing is performed while rotating the cylinder at a high speed of 500 to 600 rpm, and if an object provided in these cylinder gaps pops out, an expensive blanket must be formed. The fact is that it is difficult to adopt because it requires a considerable amount of downtime to hurt, stop printing work and recover. This means that even if a rubber thing is provided in the cylinder gap, when a rubber thing with a thickness of about 10 mm, a width of several tens of mm, and a length of 800 mm, which is almost the same size as the cylinder gap, is sandwiched between the cylinders, Depending on the thickness, the same trouble as described above may occur. Therefore, an object of the present invention is to provide a cylinder cleaning dirt push-in preventing body in which the above-mentioned trouble hardly occurs, that is, having a lightweight and easily deformable physical property. Another purpose is
An object of the present invention is to provide a tool for embedding the above-mentioned push-in preventing body at a predetermined position in a cylinder gap.

[0005]

In order to achieve the above object, the invention according to claim 1 is for pushing a cylinder cleaning dirt used by being buried in a cylinder gap provided in a full length or a part of a rotary cylinder in an axial direction. A preventive body having a width exceeding the width of the cylinder gap and a length substantially equal to the length of the cylinder gap, being lightweight and easily deformable in the width direction of the cylinder gap, and storing the original shape restoring force when deformed. It is composed of a sponge-like structure, a foamed plastic structure, or a fibrous structure having physical properties. According to another aspect of the present invention, in the first aspect, the following features are provided. (1) A notch or an opening for insertion into a predetermined position of the cylinder gap is provided over a part or almost the entire length of a portion located on the cylinder surface side. (2) The sponge-like structure, the foamed plastic structure, or the fibrous structure has at least a surface on the cylinder surface side covered with a surface material having a smooth surface. (3) Adhesive is applied to the side surface of the cylinder gap facing the side wall surface.

According to a fifth aspect of the present invention, there is provided a tool for embedding the push-in prevention member according to the third aspect in a cylinder gap, wherein a member positioned to face the cylinder gap and a push-in prevention member connected to the member are provided. And an insertion part to be inserted into a notch or opening of the body. An embedding tool according to another aspect of the present invention has the following configuration. (1) The member located opposite to the cylinder gap has a surface or a portion substantially parallel to the surface of the portion where the cut portion or the opening of the push-in preventing body is formed. (2) The insertion portion is formed of one or more plate-like members or rod-like members. (3) A guide member is provided on a member positioned to face the cylinder gap and extends in the cylinder axial direction. The guide member is provided between the side wall surface of the cylinder gap and the side surface of the push-in preventing body opposed thereto. Be interposed between them.

[0007] The invention of claim 9 is based on claims 1, 2, 4
A tool for burying the push-in prevention member in the cylinder gap, comprising a member positioned to face the cylinder gap, and a guide member provided in the member and extending in the cylinder axial direction, wherein the guide member is It is configured to be interposed between the side wall surface of the cylinder gap and the side surface of the push-in preventing body opposed thereto. According to a tenth aspect of the present invention, in the invention of the eighth or ninth aspect, the guide member is provided by integral molding on a member positioned to face the cylinder gap. According to an eleventh aspect of the present invention, in the invention of the eighth or ninth aspect, the guide member is disposed in a direction parallel to the side wall surface of the cylinder gap and the side surface of the push-in preventing member with respect to the member positioned opposite the cylinder gap. It is configured to be movable.

[0008]

According to the first aspect of the present invention, the push-in preventing body is buried in a state of being deformed in the width direction of the cylinder gap, so that the original restoring force is applied to the cylinder through the side surface of the push-in preventing body. Since the buried state is maintained by acting on the side wall surface or the blanket surface of the gap, the probability that the push-in preventing body will protrude from the cylinder gap when the cylinder rotates at high speed can be extremely reduced. In addition, since the push-in preventing body is easily deformed, even if the push-out preventive body jumps out and is caught between the cylinders, the risk of damaging the blanket or the like is reduced. In addition, since the push-in prevention body has a lightweight and easily deformable structure, the force for popping out of the cylinder gap during high-speed rotation of the cylinder, that is, the centrifugal force is small, so that a more reliable embedded state is maintained. Furthermore, when embedding the push-prevention body that is slender and easy to bend into the cylinder gap, insert the tool into the notch or opening of the press-prevention body and keep it in shape to facilitate embedding in the cylinder gap and easily place it in a predetermined place. Can be positioned.

According to the fifth to eleventh aspects , the member facing the cylinder gap of the embedding tool abuts on the upper surface of the push-in preventing body, so that the push-in preventing body can be uniformly pushed and inserted into the cylinder gap. . Since the push-in prevention body is wider than the cylinder gap width, the push-in prevention body is prevented from being crushed in the depth direction of the cylinder gap by being pushed by a member facing the cylinder gap, so that the depth of the cylinder gap is reduced. It can be buried smoothly in the depth of the direction. Therefore, large deformation in the depth direction of the cylinder gap is not generated inside the push-in prevention body, and the push-in prevention body is prevented from protruding from the cylinder gap due to recovery of the deformation (return to the original shape). That is, the push prevention member is deformed only in the width direction of the cylinder gap. The guide portion suppresses the deformation of the push-in preventing body in the depth direction of the cylinder gap, and facilitates embedding in the cylinder gap by deforming only in the width direction. When there is no insertion portion, the upper surface of the push-in preventing body can be covered with a surface material such as a sheet simultaneously with the embedding of the push-in preventing body. In addition, since the guide portion is movable, it is possible to prevent the push-in prevention members from coming out of the cylinder gap together with the push-in prevention member when the tool is removed from the cylinder gap after the push-in prevention member is embedded in the cylinder gap. Further, when an adhesive is attached, the adhesive can be firmly attached to the cylinder gap wall or the like by moving and removing the guide portions one by one.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a side view of the push-in preventing body, and FIG. 2 shows a partially cut-away perspective view. FIG. 3 and FIG. 4 show a state in which the push prevention member is embedded in the cylinder gap. Indentation prevention body 1
Has a lightweight structure that is easily deformed and has physical properties to store its original shape restoring force when deformed, and is made of a material that is chemically stable and stable to water. It should preferably be stable to printing inks, detergents and fountain solutions. The push-in prevention body 1 is deformed when embedded in the cylinder gap 22, and the embedded state is maintained by the original shape restoring force at the time of the deformation. The structure is light in weight so as not to fly out due to centrifugal force when the cylinder 20 rotates at high speed. The anti-push body 1 that satisfies these conditions includes a sponge-like structure, a foamed plastic structure, and a fibrous structure. The sponge-like structure is made of rubber, synthetic resin,
The fibrous structure is formed of artificial fibers such as synthetic fibers, natural fibers, and the like.

The push-in prevention body 1 has a width W (> w) exceeding the width w of the cylinder gap 22 and, when used, compresses by applying a force to all or a part of both side surfaces to be narrower than the width of the cylinder gap 22. Deform to become. Connect the end of the blanket 21 to the blanket winding shaft 2 of the cylinder gap 22.
After being wrapped around and mounted on 3a and 23b, the push-in prevention body 1 is buried so as to be compressed and deformed to be narrower than the width of the cylinder gap 22 and pushed into the cylinder gap 22. In the buried state, the side face of the push-in preventing body 1 is pressed and adhered to the blanket end face located in the cylinder gap 22 by the original shape restoring force.

As shown in FIG. 3, the vertical length of the push-in preventing body 1 corresponding to the depth direction of the cylinder gap 22 is such that the restoring force between the blanket winding shafts 23a and 23b and the cylinder surface, that is, the width-wise restoring force. In the range which acts on the side wall surface of the cylinder gap 22 or the surface of the blanket 21 located in the cylinder gap, or the space between the blanket winding shafts 23a and 23b and the bottom of the cylinder gap 22 as shown in FIG. 24, the bulge portion 1a of the push prevention body 1 which has been returned to its original shape wider than the width of the cylinder gap enters and generates an anchor effect. The bulging portion 1a of the push-in preventing body acts as a resistance against centrifugal force when the cylinder rotates.

If the push-in prevention body 1 embedded in the cylinder gap 22 protrudes greatly from the cylinder surface, a printing problem will occur. Therefore, it must be embedded at a position (predetermined position) immersed in the cylinder surface. It is not easy to embed the deformable elongated push prevention body 1 so as not to protrude from the cylinder surface over the entire length of the cylinder axis. Therefore, a configuration for efficiently embedding the push-in preventing body 1 in a predetermined position of the cylinder gap 22 will be described.

FIG. 5 shows the basic structure of a tool for burying a push-in prevention member. First, the structure of the push-in preventing body 1 when the embedding tool 4 is used will be described. In FIG. 1, the push-in preventing body 1 has a cut portion having a predetermined depth in a cylinder axial direction, that is, a longitudinal direction and a central portion (FIG. 1a) or an opening (FIG. 1b) is provided.
The cuts or openings are provided almost entirely or partially over the entire length of the push-in prevention body. The opening is formed of a hole, a groove, or the like in accordance with the shape of an insertion portion on the tool side described later.

In FIG. 5, the embedding tool 4 has an elongated structure having a T-shaped cross section, and includes a member 5 which is positioned opposite to the cylinder gap and an insertion portion which is inserted into a cutout or opening of the push-in preventing body. It consists of six. When the push-in prevention body is embedded in the cylinder gap, the width of the member 5 is set so that the member 5 comes into contact with the upper surface of the push-in prevention body to apply a pushing force and the push-in prevention body can be embedded in a predetermined position of the cylinder gap. Make it equal to or slightly wider than the width of the preventive body.

The member 5 has a substantially parallel surface with respect to the surface of the portion where the cut portion or opening of the push-in preventing body is formed, in the case of a plate-like member shown in FIGS. , E have portions where the bar-shaped members face each other. In the case of the plate member 5, a rigid flat plate or a flexible plate can be used. In particular, as shown in FIGS. 6B and 6C, when the insertion portion is composed of a plurality of plate-like members or rod-like members, by using a flexible plate member 5, the embedding tool can be removed from the push prevention body embedded in the cylinder gap. When extracting, it is possible to extract while bending the plate member, that is, peeling off the tape.

The insertion portion 6 is connected to the member 5 by integral molding, or is made of a separate member and is connected to the member 5 by fixing.
Preferably, the member 5 and the insertion portion 6 are provided so as to be orthogonal to each other, so that when the insertion portion is inserted into the cut portion or the opening of the push-in prevention body, the entire member 5 is placed on one surface of the push-in prevention body (on the cylinder surface side). Since it can be pressed against the exposed surface, it can be easily inserted into the cylinder gap in cooperation with the insertion portion, and can be embedded accurately and quickly at a predetermined location.

FIG. 6 shows an example of the configuration of the embedding tool. FIG. 7 shows various modes of the cut portion or the opening of the push-in preventing body. FIG. 6A
The embedding tool shown in (1) is an example used when the notch 2 (FIG. 7A) or the opening 3 (FIG. 7B) is provided over the entire length of the push-in preventing body. The member 5 located opposite the cylinder gap is formed of a plate member having a width substantially equal to the width of the push-in preventing body, and the insertion portion 6 extends over the entire length of the cutout or opening of the push-in preventing body. It is constituted by one plate-like member to be inserted. The embedded tool shown in FIG. 6B is provided with a notch 2a or an opening 3a over the entire length of the push-in preventing body, as shown in FIGS. 7A and 7B or partially as shown in FIGS. 7C and 7D. This is an example used when When the notch or opening of the push-in prevention body is partially provided, a plurality of plate-like members 6a are inserted into the cylinder gap as the insertion portion 6 in accordance with the position of the notch or opening of the push-in prevention body. It is provided continuously to the plate member 5 located opposite to the plate member 5.

The embedding tool shown in FIG. 6C is an example used when a partially hole-shaped opening 3b shown in FIG. 7E is provided over the entire length of the push-in preventing body. A plurality of rod-shaped members 6b are continuously provided as insertion portions 6 on the plate member 5 located opposite to the cylinder gap in accordance with the position of the opening 3b of the push-in preventing body. The embedding tool shown in FIG. 6D has a partially hole-shaped opening 3b (see FIG.
This is an example used when E) is provided. The member 5 located opposite to the cylinder gap is composed of rod-shaped members 5a arranged at arbitrary intervals, and is connected to a rod-shaped member 6b as an insertion portion 6 via a connecting body 4a. The rod-shaped member 6b as the insertion portion 6 is the same as in FIG. 6C. In the embedding tool shown in FIG. 6E, the member 5 positioned opposite to the cylinder gap is constituted by bar-shaped members 5a arranged at arbitrary intervals, and the bar-shaped member 5a is connected to the plate member 6 as the insertion portion 6. ing.

How to use the T-shaped burial tool will be described.
Inserting the embedding tool shown in FIG. 6 which fits the shape of the notch or opening of the push-in prevention body shown in FIG. 7 into the push-in prevention body and then pushing it into the cylinder gap shown in FIG. Occurs and is buried in place. At this time, the pushing operation is performed in a state where the entire member 5 is in contact with the pushing prevention body, so that the pushing force uniformly acts on the entire pushing prevention body, and the embedding of the cylinder gap in a predetermined place is prevented. Easy to do. When the embedding is completed, the tool is extracted and the work is completed. The push-in prevention body is held in the cylinder gap by the self-restoring force.

When the push-in prevention member is buried with a T-shaped burying tool, the push-in prevention member is formed to have a width slightly larger than the cylinder gap, so that friction occurs due to the push-in between the blanket in the cylinder gap and the embedding work. Make it difficult. That is, it takes time to position the cylinder gap at a predetermined position. An embodiment improved to solve this problem will be described. FIG. 9 is a side view and an AA sectional view of the embedding tool. The guide portion 7 is arranged to face the longitudinal direction of the member 5 so that the insertion portion 6 is located at the center. The guide portion 7 has a length substantially equal to the vertical length of the push-in preventing body (h in FIG. 1) to a slightly larger length, and is provided at an interval slightly smaller than the width of the cylinder gap (inner blanket). I have. That is, the guide portions 7 are arranged at such an interval that the outer surface thereof touches the surface of the blanket in the cylinder gap. Therefore,
Since the inner dimension of the guide portion 7 is smaller than the width of the push-in preventing body, the push-in preventing body is compressed and deformed in the width direction when the insertion portion 6 is inserted.

The usage of the T-shaped embedding tool is basically the same as that without the guide portion. However, when embedding the push-in preventing body in the cylinder gap, as shown in FIG. The guide part 7 is interposed between the side of the body. That is, since the guide portion 7 slightly touches the blanket in the cylinder gap, and there is almost no friction between the guide portion 7 and the blanket, the pushing force is reduced and the guide portion 7 can be easily embedded in a predetermined place. When the embedding is completed, one end side of the push-in prevention body is pressed, the tool at that portion is pulled out, and the pulling-out work is completed from there toward the other end.

Next, a description will be given of a movable embedding tool for embedding the push-in preventing body while moving in the cylinder gap. FIG. 11 shows a use state of the movable embedding tool. FIG.
Shows a side view. The embedding tool is formed integrally with a bottom portion 5 which is a member positioned opposite to the cylinder gap, both side portions 7 which form a guide portion, and an insertion portion 6, and a handle 8 for operation is provided outside the bottom portion 5. Is provided. As shown in FIG. 12, the moving direction side of the burying tool has a boat shape, so that it is easy to move in the cylinder gap and the push-in preventing body easily enters the burying tool. Since both side portions 7 are narrower than the width of the push-in prevention body, when the buried tool is moved, the push-in prevention body is guided by the boat-shaped portion and is compressed and deformed.
It is buried in the cylinder gap. The movable burying tool shown in FIG. 13 is added to the boat-shaped portion so as to be greatly opened so that the push-in preventing body is smoothly compressed and deformed when moving.
Guide surface 9 that contacts both sides of the push-in prevention body in the opening.
To form The guide surface 9 is widened toward the open end as shown.

Although the embedding tool has been described as having an opposing guide portion, it may be a single guide portion. In the case of one guide portion, a part (half) of the push prevention member is compressed between the insertion portion and the guide portion, but the side surface of the push prevention member without the guide portion is pressed against the blanket surface in the cylinder gap. The whole of the push-in prevention body is compressed and deformed, and the guide portion side is pushed in first so as to be embedded.

Next, another embodiment of the push-in prevention member and the embedding tool will be described. FIG. 14 shows a configuration in which a spot-shaped tape that can be adhered to both sides is attached to one side surface of the push-in prevention body. FIG. 15 shows a side surface of the push-in preventing body, in which the cover tape 11 is not shown. A cover tape 11 is applied to the spot-shaped tape 10 and is attached to the push-in prevention body at intervals. A part of this cover tape 11 is shown in FIG.
The spot-shaped tape 10 is adhered to the side surface so as to project from the upper part of the push-in preventing body 1 as shown in FIG. As shown in FIG. 16, the spot-shaped tapes 10 are preferably stuck to positions shifted from each other on the respective side surfaces of the push-in preventing body. In order to maintain the embedded state of the push-in prevention body by bonding,
It is more reliably held in the cylinder gap. On the other hand, the embedding tool is provided with a notch 12 at a portion where the spot-shaped tape 10 is located as shown in FIG.

When embedding the push-in prevention body in the cylinder gap, the cover tape 11 is removed from the push-in prevention body, and the insertion portion of the embedding tool is inserted. The spot tape 10 enters the notch 12 of the guide 7 of the embedding tool and is protected so that its adhesive surface does not contact the blanket. The push-in prevention body is buried in the cylinder gap, and the embedding tool is pulled out by about half. That is, after the notch 12 is removed from the tape 10, it is pressed several times in the direction of the side wall surface of the cylinder gap so as to be securely bonded. Then, when the buried tool is removed, the spot-shaped tape 1
0 is adhered and held on the surface of the blanket.

The embedding tool shown in FIG. 18 is provided so that the guide portion 7 is not fixed to the member 5 but can be removed by movement. The guide part 7 is attached so as to penetrate the member 5 as shown in FIG. 19, and moves in the direction of the arrow after embedding the push-in preventing body. When this embedding tool is applied to a push-in prevention body having a spot-shaped tape 10 adhered to the side surface, the guide portion 7 is embedded after embedding.
The tape can be more securely adhered to the blanket surface by moving the embedding tool in the direction of the side wall surface of the cylinder gap with only the extraction and insertion portion 6 being inserted deeply.

The embedding tool shown in FIG. 20 is constituted by a member 5 having a slightly thick shape as a member positioned opposite to the cylinder gap, and a guide portion 7 is screwed to the side surface of the member 5 or a spring clamp 14 shown in FIG. Fix with. Since the verticality of the guide portion 7 is ensured by the thick member 5, the outward deformation due to the self-restoring force of the push-in preventing body can be suppressed. Further, since the member 5 is thick, it is easy to push uniformly over the entire length of the push-in preventing body, and it is easy to obtain linearity.
FIG. 21 shows an embedding tool having no insertion portion, in which the surface of a thick member is pressed against the push-in preventing body and is embedded. These embedding tools remove the screwing 13 or the resilient clamp 14 after embedding the push-in prevention body, pull out the guide part 7, and remove the member 5
Remove.

FIG. 23 shows an example of embedding by an embedding tool having no insertion portion. The upper part of the push-in prevention body is covered with a thin sheet 14 as a surface material having a smooth surface, is compressed and deformed in the width direction, and is set in the guide part 7 of the embedding tool. When removing the embedding tool after embedding the push-in prevention body, the sheet is sandwiched between the side surface of the push-in prevention body and the side wall surface of the cylinder gap.

When the indentation prevention body is a sponge-like structure, the surface of the sponge is rough and the cleaning dirt tends to remain. However, by covering the upper part with a sheet, the cleaning dirt can be prevented from remaining. By bonding the tape to the upper surface of the push-in preventing member, the same operation and effect as those of the sheet can be obtained. By applying a sliding surface, for example, Teflon, to the inside and outside of the guide portion, the guide portion can be easily pulled out. The push-in prevention member can be implemented with one having a uniform width in the depth direction of the cylinder gap or one having an uneven width, that is, a portion having a portion equal to and exceeding the width of the cylinder gap.

[Brief description of the drawings]

FIG. 1 is a side view of a push prevention body according to the present invention.

FIG. 2 is a partially cutaway perspective view of the push-in preventing body.

FIG. 3 is a cross-sectional view showing a state in which a push prevention member is embedded in a cylinder gap.

FIG. 4 is a cross-sectional view showing an embedded state of a push-in preventing body according to another embodiment.

FIG. 5 is a side view showing a basic configuration of an embedding tool of the push-in preventing body.

FIG. 6 is a perspective view showing a configuration example of an embedding tool.

FIG. 7 is a plan view showing various modes of a cut portion or an opening of the push-in preventing body.

FIG. 8 is a cross-sectional view when the embedding tool is used.

FIG. 9 is a side view of an embedding tool having a guide portion, and FIG.
It is -A sectional drawing.

FIG. 10 is a cross-sectional view when an embedding tool having a guide portion is used.

FIG. 11 is a perspective view showing a use state of the movable embedding tool.

FIG. 12 is a side view of the movable embedding tool.

FIG. 13 is a plan view showing a usage state of a modification of the movable burying tool.

FIG. 14 is a side view of the push-in prevention body to which the spot-shaped tape is adhered.

FIG. 15 is a front view of the push-in preventing body to which the spot-shaped tape is adhered.

FIG. 16 is an explanatory diagram showing an example of how to attach a spot-shaped tape.

FIG. 17 is an explanatory diagram showing a relationship between a guide portion of an embedding tool and a spot-shaped tape.

FIG. 18 is a perspective view of an embedding tool having a movable guide portion.

FIG. 19 is a side view of FIG. 18;

FIG. 20 is a side view of an embedding tool having an insertion portion using a thick member.

FIG. 21 is a side view of an embedding tool using a thick member without an insertion portion.

FIG. 22 is a side view of the embedding tool holding the guide portion by a spring clamp.

FIG. 23 is a side view showing an example of embedding by an embedding tool having no insertion portion.

FIG. 24 is a perspective view of a cylinder having a cylinder gap and a cylinder cleaning device.

FIG. 25 is a plan view of a cylinder of a web offset press for newspaper printing.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Push prevention body, 2 ... Cut part, 3 ... Opening part, 4 ... Buried tool, 20 ... Cylinder, 21 ... Blanket, 22 ... Cylinder gap, 23a, 23b ... Blanket winding shaft

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-133644 (JP, A) JP-A-4-219242 (JP, A) Japanese Utility Model Showa 58-155249 (JP, U) (58) Field (Int.Cl. ⁶ , DB name) B41F 30/00-30/06

Claims (11)

(57) [Claims] 1. A body for preventing a cylinder cleaning dirt from being pushed into a cylinder gap provided in an entire length or a part of an axial length of a rotary cylinder, wherein the cylinder gap has a width exceeding a width of the cylinder gap. A length that is approximately equal to the length, lightweight and
It is easy to deform in the width direction of Dagip, and sponge-like structure or sponge with physical properties to store the original shape restoring force inside when deformed
Composed of foam plastic structure or fibrous structure
Pushing prevention bodies. 2. An adhesive is applied to a side surface of the cylinder gap that faces the side wall surface.
The push-in prevention body described. 3. A notch or an opening for insertion into a predetermined position of a cylinder gap is provided over a part or substantially the entire length of a part located on the cylinder surface side. Item 3. The push-in preventing body according to Item 1 or 2. 4. The sponge-like structure or foam plus
2. The push-in prevention body according to claim 1 , wherein the tick structure or the fibrous structure has at least a surface on the cylinder surface side covered with a surface material having a smooth surface. 5. A tool for burying the push-in preventing body according to claim 3 in a cylinder gap, comprising: a member positioned to face the cylinder gap; A tool for burying a push-in prevention body comprising a notch or an insertion portion inserted into an opening. 6. A member positioned opposite to the cylinder gap has a surface or a portion substantially parallel to a surface of a portion where a cut portion or an opening of the push prevention member is formed. A tool for burying a push prevention body according to claim 5. 7. The tool according to claim 5, wherein the insertion portion is formed of one or more plate-like members or rod-like members. 8. A guide member provided on a member located opposite to the cylinder gap and extending in a cylinder axial direction, wherein the guide member includes a side wall surface of the cylinder gap and a push-in preventing body opposed thereto. 6. The tool according to claim 5, wherein the tool is embedded between the side surface and the side surface. 9. A tool for burying the push-in prevention body according to claim 1, 2 or 4 in a cylinder gap, comprising: a member positioned to face the cylinder gap; and a cylinder shaft provided on the member. A push prevention member embedding tool, comprising a guide member extending in a longitudinal direction, wherein the guide member is interposed between a side wall surface of the cylinder gap and a side surface of the push prevention member opposed thereto. 10. The tool according to claim 8, wherein the guide member is provided integrally with a member located opposite to the cylinder gap. 11. A guide member is provided so as to be movable in a direction parallel to a side wall surface of the cylinder gap and a side surface of the push-in preventing member with respect to a member located opposite to the cylinder gap. 10. The tool for burying a push-in preventing body according to claim 8, wherein