KR102345808B1 - Wiper for use in sealer pump and sealer pump including same - Google Patents

Abstract

A wiper for a sealer pump disposed on an inductor inserted into a sealer container is provided. The wiper for a sealer pump includes a tube body and a coil spring. The tube body is coupled to the outer circumferential surface of the inductor and is configured to seal the outer circumferential surface of the inductor and the inner circumferential surface of the sealer container. The tube body has an insertion bore formed in the circumferential direction of the inductor on the inside over an entire length thereof. The coil spring is inserted in the insertion bore over the entire length of the tube body. The tube body and the coil spring are elastically deformed in the outer and inner radial directions by the outer circumferential surface of the inductor and the inner circumferential surface of the sealer container. The present invention provides the wiper for a sealer pump that maintains airtightness reliably and has an increased service life.

Description

Wiper for sealer pump and sealer pump comprising same

The present disclosure relates to a wiper used in a sealer pump for supplying a sealer for an automobile body.

The vehicle body is assembled by welding or bonding various metal panels. A curable fluid material with properties such as adhesion, sealing, vibration damping, rust prevention, waterproofing, and rigidity reinforcement is applied to the automobile body. Such a fluid material is referred to in the art as a sealer.

A sealer application device installed on an automobile assembly line applies a sealer to an automobile body. The sealer applying apparatus has a sealer gun for applying a sealer, and a sealer pump for supplying the sealer to the sealer gun. The sealer is contained in a can container, and the can container is provided to the sealer pump. The sealer pump pumps the sealer from the can container and supplies the sealer to a sealer gun.

The sealer pump has a compression section that is inserted into the can container and compresses the sealer. A wiper formed in a ring shape is attached to the compression part. The wiper seals the compression part of the sealer pump and the inner peripheral surface of the can container to maintain airtightness between the sealer pump and the can container, and withstands the pressure of the compressed sealer.

A can container with an exhausted sealer is removed from the sealer pump, and a new can container is replaced with the old can container and provided to the sealer pump. The compression part of the sealer pump can be inserted into a new can container with the wipers applied to the old can container attached. In the process of supplying the sealer by pumping the sealer by the sealer pump, the can container is repeatedly replaced, and the wiper that was previously used can be applied to a new can container as it is.

The wiper may be formed as a unit from a resin material. When the compression part of the sealer pump is inserted into the can container, the wiper adheres to the inner peripheral surface of the can container in a compressed state and exhibits airtightness. Once the compression part of the sealer pump is inserted into the can container, the wiper is used in constant compression until the sealer in the can container is exhausted. If the wiper is used for a long time in a compressed state, the restoring force (elasticity) of the wiper may be lost. Accordingly, the airtightness between the wiper and the inner circumferential surface of the can container is reduced, and the sealer inside the can container may leak through the portion where the airtightness of the wiper is weakened. Also, if the wiper is used for a long time in a compressed state, the wiper may be stuck in the compressed state. If a compressed, stuck wiper is applied to a new can container, the wiper will not exhibit adequate airtightness and may cause sealer leakage. Accordingly, it is necessary to replace the wipers every time a new can container is supplied. As described above, the conventional wiper does not reliably maintain airtightness and has a short service life.

The disclosed embodiments provide a wiper for a sealer pump that solves the problems of the prior art described above. One embodiment of the present disclosure provides a wiper for a sealer pump that can be used in a compressed state for a long time between a sealer container and a compression part of the sealer pump, maintains high airtightness reliably, and has an increased service life. One embodiment of the present disclosure provides a wiper for a sealer pump that returns to its original shape and exhibits high resilience and improved airtightness.

One aspect of the disclosed embodiments relates to a wiper for a sealer pump. A wiper for the sealer pump is disposed on the inductor that is inserted into the sealer container. A wiper for a sealer pump according to an embodiment includes a tube body and a coil spring. The tube body is coupled to the outer circumferential surface of the inductor and is configured to seal the outer circumferential surface of the inductor and the inner circumferential surface of the sealer container. The tube body has an insertion bore formed in the circumferential direction of the inductor on the inside over its entire length. A coil spring is inserted in the insertion bore over the entire length of the tube body. The tube body and the coil spring are elastically deformed in the outer and inner radial directions by the outer circumferential surface of the inductor and the inner circumferential surface of the sealer container.

In one embodiment, the coil spring is configured to apply a restoring force to the tube body in an outer radial direction and an inner radial direction over the entire length of the tube body.

In one embodiment, the outer diameter of the coil spring is smaller than the diameter of the insert bore and a gap is formed between the surface of the insert bore and the coil spring.

In one embodiment, the coil spring is inserted in a circumferentially compressed state in the insertion bore.

In one embodiment, the tube body has a ring shape to fit into the wiper groove formed in the circumferential direction on the outer peripheral surface of the inductor.

In one embodiment, the tube body has a first cut end forming one end of the tube body, a second cut end forming the other end of the tube body in the circumferential direction, and the first and second cut ends are joined has a junction. The coil spring has a length longer than the entire length of the tube body from the first cut end to the second cut end.

In one embodiment, the coil spring may be any one coil spring selected according to the circumferential length of the inner circumferential surface of the sealer container from a plurality of coil spring groups having different wire diameters and different spring pitches.

In one embodiment, the tube body defines an insertion bore and includes a first layer formed of a resin material, a second layer formed to surround the first layer and made of a woven yarn, and a resin material formed to surround the second layer and has a third layer forming the outer circumferential surface of the tube body.

Another aspect of the disclosed embodiment relates to a sealer pump. The sealer pump pumps and supplies the sealer from the sealer container. A sealer pump according to an embodiment includes a pump housing, a piston assembly, and a motor. The pump housing includes an inductor inserted into the sealer container to compress the sealer in a downward direction, a sealer inlet formed in the inductor, a sealer passage extending upwardly from the sealer inlet, and a sealer configured to communicate with the sealer passage and discharge the sealer has an outlet. The piston assembly is disposed to be movable in an upward direction and a downward direction within the sealer passageway, and pumps the sealer in the sealer passageway to the sealer outlet. A motor is coupled to the pump housing and is configured to move the piston assembly in an upward direction and a downward direction. In addition, the sealer pump according to the embodiment includes a wiper for the sealer pump according to the above-described embodiment disposed on the outer peripheral surface of the inductor to seal the outer peripheral surface of the inductor and the inner peripheral surface of the sealer container.

According to the wiper for the sealer pump according to an embodiment, a coil spring inserted into the tube body applies an elastic force and a restoring force to the tube body. Therefore, since the wiper for the sealer pump according to the embodiment may have stronger airtightness and improved stability, the airtightness between the inductor and the sealer container may be maintained with high reliability for a long period of time, may have an increased service life, and compressed It does not cause the phenomenon of sticking in the state. In addition, the wiper according to an embodiment may be applied to a new sealer container without being replaced.

The wiper for a sealer pump according to an embodiment may be manufactured by inserting a coil spring into a tube body. Accordingly, the wiper for the sealer pump with increased airtightness and stability can be provided with a simple manufacturing method and reduced manufacturing cost.

According to the wiper for the sealer pump according to an embodiment, by changing the wire diameter and the spring pitch of the coil spring without changing the specifications of the tube body, it can be provided to have various elasticity and airtightness. Therefore, the wiper for a sealer pump according to an embodiment can be easily applied to a sealer having a variety of pressure conditions and a variety of sealer containers.

1 is a perspective view illustrating a sealer container and a sealer pump according to an embodiment.
2 is a cross-sectional view illustrating a sealer container and a portion of a sealer pump according to an embodiment.
3 is a front view illustrating a wiper and an inductor in which the wiper is installed according to an exemplary embodiment.
4 is a perspective view illustrating a state in which a wiper and an inductor are separated according to an exemplary embodiment.
5 is a plan view illustrating a wiper according to an embodiment.
Fig. 6 is a cross-sectional view of the wiper shown in Fig. 5;
7 is a cross-sectional view illustrating a state in which a wiper is installed on an inductor according to an exemplary embodiment.
8 is a cross-sectional view illustrating a state in which a wiper installed in an inductor according to an embodiment is in contact with a sealer container.
9 is a perspective view illustrating a cut end of a tube body in a wiper according to an embodiment.
10 is a cross-sectional view illustrating a cross-sectional shape of a tube body of a wiper according to an embodiment.
11 is a cross-sectional view showing another cross-sectional shape of the tube body of the wiper according to the embodiment.
12A schematically shows an example of manufacturing a wiper according to an embodiment, and shows a separated tube body and a coil spring.
12B schematically shows an example of manufacturing a wiper according to an embodiment, and shows a tube body and a coil spring inserted into the tube body.
13A is a plan view showing an example of a coil spring inserted into a tube body;
13B is a plan view showing another example of the coil spring inserted into the tube body.
13C is a plan view showing another example of the coil spring inserted into the tube body.

Embodiments of the present disclosure are exemplified for the purpose of explaining the technical spirit of the present disclosure. The scope of rights according to the present disclosure is not limited to the embodiments presented below or specific descriptions of these embodiments.

All technical and scientific terms used in this disclosure, unless otherwise defined, have the meanings commonly understood by one of ordinary skill in the art to which this disclosure belongs. All terms used in the present disclosure are selected for the purpose of more clearly describing the present disclosure and not to limit the scope of the present disclosure.

As used in this disclosure, expressions such as 'comprising', 'including', 'having', etc. are open-ended terms connoting the possibility of including other embodiments, unless otherwise stated in the phrase or sentence in which the expression is included. (open-ended terms).

Expressions in the singular in this disclosure may include the meaning of the plural unless otherwise stated, and the same applies to expressions in the singular in the claims.

Expressions such as 'first' and 'second' used in the present disclosure are used to distinguish a plurality of components from each other, and do not limit the order or importance of the corresponding components.

In the present disclosure, when it is stated that a certain element is 'connected' or 'coupled' to another element, it means that the certain element can be directly connected or coupled to the other element, or a new element. It should be understood that other components may be connected or combined via other components.

The dimensions and numerical values described in the present disclosure are not limited to only the indicated dimensions and numerical values. Unless otherwise specified, such dimensions and numerical values are to be understood to mean the recited values and equivalent ranges inclusive thereof.

Hereinafter, embodiments will be described with reference to the accompanying drawings. In the accompanying drawings, the same or corresponding components are assigned the same reference numerals. In addition, in the description of the embodiments below, overlapping description of the same or corresponding components may be omitted. However, even if descriptions regarding components are omitted, it is not intended that such components are not included in any embodiment.

The embodiments disclosed below and the embodiments shown in the accompanying drawings are a sealer pump configured to pump and supply a sealer for a vehicle body, and a wiper for a sealer pump employed in such a sealer pump and performing a sealing action when the sealer is pumped (hereinafter referred to as the sealer pump) , simply called 'wiper').

The sealer pump according to an embodiment is one of the components constituting the sealer applying device. The sealer application device may apply a fluid material (ie, a sealer) that exhibits functions such as adhesion, sealing, vibration damping, rust prevention, waterproofing, and rigidity reinforcement to a panel of an automobile body in various patterns. The sealer applying apparatus may include a sealer pump, a sealer gun for applying the sealer supplied by the sealer pump to a panel of a vehicle body, and a controller for controlling operations of the sealer pump and the sealer gun. The sealer application device may be installed in a production line for manufacturing a panel of an automobile body. In addition, a robot installed in the production line may support the sealer gun, position the sealer gun on the panel of the vehicle body, and move the sealer gun on the panel. The sealer supplied from the sealer pump may be delivered to the sealer gun through the sealer hose.

Reference is made to FIG. 1 which shows a sealer container and a sealer pump according to one embodiment. A sealer container 10 filled with a sealer is provided to the sealer pump 100 . The sealer pump 100 pumps the sealer 11 from the sealer container 10 , and supplies the pumped sealer through the sealer hose 20 . The sealer hose 20 may be connected to the above-described sealer gun, and the sealer from the sealer pump 100 may be supplied to the sealer gun. The sealer container 10 may be provided in the vicinity of the sealer pump 100 in a sealed state. The opened sealer container 10 is placed in the sealer pump 100 . The sealer container 10 may take the shape of a can or drum. Accordingly, the sealer container 10 has a cylindrical inner peripheral surface 12 . The sealer pump 100 includes an element that is inserted into the sealer container 10 and compresses the sealer 11 in the sealer container 10 , and an element that pumps the compressed sealer and supplies it through the sealer hose 20 . . A sealer container that has run out of sealer may be replaced with a new sealer container. The sealer pump 100 may pump and supply the sealer in the new sealer container.

2 is a cross-sectional view illustrating a sealer container and a portion of a sealer pump according to an embodiment. A sealer pump according to an embodiment will be described with reference to FIGS. 1 and 2 together.

The sealer pump 100 according to an embodiment includes a pump housing 110 that compresses a sealer 11 and into which the compressed sealer is introduced, and a piston assembly 130 that pumps the sealer introduced into the pump housing 110 and , the piston assembly 130 may include a motor 140 for moving the piston assembly 130 to pump the sealer. Also, according to an embodiment, the sealer pump 100 may be configured to move the pump housing 110 and the motor 140 in the upward direction UD and the downward direction DD. For example, the sealer pump 100 includes an actuator 150 that moves the pump housing 110 and the motor 140 in the upward direction (UD) and the downward direction (DD), and the actuator 150 is coupled to the pump housing. It may include a support 160 supporting the 110 and the motor 140 .

The actuator 150 may consist of a pair of pneumatic cylinder devices 151, but is not limited thereto. A support 160 is coupled to the distal end of the operating arm 152 of the pneumatic cylinder device 151 . By the upward operation and downward operation of the pneumatic cylinder device 151 , the support body 160 is moved in the upward and downward directions. The support body 160 includes a base plate 161 and a tie rod 162 extending downwardly from the base plate 161 . The motor 140 is located on the base plate 161 and is coupled to the base plate 161 . A portion of the pump housing 110 is coupled to the tip of the tie rod 162 . Accordingly, the motor 140 is coupled to the pump housing 110 through the support 160 , and moves together with the pump housing 110 in the upward and downward directions by the operation of the pneumatic cylinder device 151 .

The opened sealer container 10 is disposed between the pair of pneumatic cylinder devices 151 , and the pump housing 110 is positioned above the sealer container 10 . By the downward operation of the pneumatic cylinder device 151 , the pump housing 110 is moved into the sealer container 10 in the downward direction DD. In a state where the pump housing 110 compresses the sealer 11 , the sealer 11 is pumped by the piston assembly 130 . The pump housing 110 has an inductor 120 , a sealer inlet 111 , a sealer passage 112 , and a sealer outlet 113 .

The inductor 120 is inserted into the sealer container 10 to compress the sealer 11 in the downward direction DD. The inductor 120 is provided at the lower end of the pump housing 110 and compresses the sealer 11 in the sealer container in the downward direction DD by the downward operation generated by the pneumatic cylinder device 151 . The inductor 120 is formed along the cylindrical portion 121 and the edge of the cylindrical portion 121 and the pressing flange 122 protruding in the outer radial direction (ROD), and formed along the edge of the pressing flange (122) and has an edge flange 123 protruding in the upward direction (UD). The pressing flange 122 is in contact with the sealer 11 on its lower surface, and compresses the sealer 11 in the downward direction DD by the downward movement of the pump housing 110 . The inductor cover 124 is coupled between the upper end of the edge flange 123 and the cylindrical portion 121 . The edge flange 123 can contact the inner peripheral surface 12 of the sealer container 10 along the circumferential direction CD of the inductor. The surface of the edge flange 123 formed along the circumferential direction CD becomes the outer peripheral surface 125 of the inductor 120 .

The circumferential direction CD refers to a circumferential direction centered on the upper direction UD or the lower direction DD. The outer radial direction ROD refers to a radial direction facing outward with respect to the upward direction UD or the downward direction DD. The inner radial direction means a direction opposite to the outer radial direction ROD.

In order to maintain the pressure of the compressed sealer and secure airtightness between the sealer container and the pump housing, the outer peripheral surface 125 (outer surface of the rim flange 123) of the inductor 120 and the inner peripheral surface 12 of the sealer container 10 This is sealed. In detail, the wiper 200 according to an embodiment is inserted into the sealer container 10 to seal a minute gap between the inner circumferential surface 12 of the sealer container 10 and the outer circumferential surface 125 of the inductor 120 . It is disposed in the inductor 120 . The wiper 200 is disposed on the outer peripheral surface 125 of the inductor (the outer surface of the rim flange 123 ). When the inductor 120 in which the wiper 200 is installed is inserted into the sealer container 10, the wiper 200 moves in the outer radial direction (ROD) and the inner radius by the outer peripheral surface 125 of the inductor and the inner peripheral surface 12 of the sealer container. In a state elastically deformed in the direction RID, the outer circumferential surface 125 of the inductor and the inner circumferential surface 12 of the sealer container are sealed. In addition, the wiper 200 has restoring force in the outer radial direction ROD and the inner radial direction RID. The restoring force acts over the entire length of the wiper 200 in the circumferential direction CD.

According to one embodiment, a pair of wiper grooves 126 are formed in the circumferential direction (CD) on the outer peripheral surface 125 of the inductor, and the two wipers 200 are the wiper grooves 126 of the outer peripheral surface 125 of the inductor. ) are fitted to each. The wiper 200 prevents the compressed sealer 11 from leaking from a gap between the outer circumferential surface 125 of the inductor and the inner circumferential surface 12 of the sealer container, and from the inner circumferential surface 12 of the sealer container as the inductor moves downward. Remove the sealer.

The sealer 11 compressed by the inductor 120 is introduced into the sealer passage 112 through the sealer inlet 111 . The lower opening of the cylindrical part 121 defines the sealer inlet 111 , and the lower surface of the pressing flange 122 is connected to the sealer inlet 111 in an inclined state. The sealer passage 112 penetrates in the pump housing 110 in the upward direction UD and the downward direction DD. A sealer outlet 113 is formed in the pump housing 110 so as to communicate with the sealer passage 112 near the upper end of the sealer passage 112 . The sealer 11 pumped by the piston assembly 130 is discharged from the pump housing 110 through the sealer outlet 113 . The pump housing 110 has an outlet pipe assembly 114 coupled to a sealer outlet 113 , and a sealer hose 20 is connected to the outlet pipe assembly 114 . The sealer 11 pumped by the piston assembly 130 from the pump housing 110 is supplied to the sealer gun through the sealer hose 20 .

The piston assembly 130 is disposed in the sealer passageway 112 and pumps the sealer 11 in a piston stroke manner. The piston assembly 130 is movable in the upward direction (UD) and the downward direction (DD) in the sealer passageway 112 , and the motor 140 installed in the support body 160 drives the piston assembly in the upward direction (UD) and downward direction. It moves repeatedly and periodically in the direction DD. As the motor 140 repeatedly moves the piston assembly 130 in a piston stroke manner, the piston assembly 130 pumps the sealer 11 in the sealer passage 112 to the sealer outlet 113 .

The motor 140 has a piston 141 therein, and a piston rod 142 extends from the piston 141 . The motor 140 is configured to move the piston 141 in an upward direction and a downward direction by, for example, pneumatic pressure. The piston assembly 130 includes a piston 131 disposed in the sealer passage 112 , a piston rod 132 extending from the piston 131 , and a valve body 133 coupled to an upper end of the piston rod 132 . and a connecting rod 134 coupled to the valve body 133 . The piston rod 142 of the motor is connected to the connecting rod 134 by a coupler 143 .

The pump housing 110 has a lower valve 115 and an upper valve 116 in the sealer passage 112 . The lower valve 115 is disposed above the cylindrical portion 121 of the inductor. Upon the downward movement of the piston assembly 130 , the lower valve 115 is closed, and upon the upward movement of the piston assembly 130 , the lower valve 115 is opened. The upper valve 116 is disposed below the sealer outlet 113 . Upon downward movement of the piston assembly 130 , the upper valve 116 opens. When the piston assembly 130 is moved upward and the piston 131 reaches top dead center, the upper valve 116 is closed. The piston 131 is configured to pass the sealer 11 from bottom to top, and is configured not to allow the sealer 11 to pass from top to bottom. A piston rod 132 passes through the lower valve 115 . The valve body 133 opens or closes the upper valve 116 according to the movement of the connecting rod 134 and the piston rod 132 . At top dead center of the piston 131 , the valve body 133 is coupled to the upper valve 116 to close the upper valve 116 .

By actuation of the pneumatic cylinder device 151 , the motor 140 , the pump housing 110 and the piston assembly 130 are lowered into the sealer container 10 . Due to the pressure applied by the pneumatic cylinder device 151 , the inductor 120 presses the sealer 11 in the sealer container, and the sealer 11 is compressed by the inductor 120 to have a predetermined pressure. In the state in which the inductor 120 presses the sealer 11 in the sealer container 10 , the motor 140 operates to repeatedly move the piston assembly 130 up and down. When the motor 140 lowers the piston assembly 130, the sealer 11 passes through the piston 131 as a reaction by the descending force and the sealer passage between the piston 131 and the lower valve 115 ( 112). When the motor 140 raises the piston assembly 130 , the sealer between the piston 131 and the lower valve 115 is pulled upward through the lower valve by the piston 131 , and then the upper valve 116 . It is discharged to the sealer outlet 113 passing through. When the sealer 11 in the sealer container 10 is exhausted, the motor 140, the pump housing 110, and the piston assembly 130 are raised by the pneumatic cylinder device 151, and the sealer container 10 is exhausted. ) can be replaced with a new sealer container.

3 is a front view illustrating a wiper and an inductor in which the wiper is installed according to an exemplary embodiment. 4 is a perspective view illustrating a state in which a wiper and an inductor are separated according to an exemplary embodiment. 3 and 4 are referenced.

The wiper 200 is installed in the wiper groove 126 formed on the outer peripheral surface 125 of the inductor. A pair of wiper grooves 126 are formed in the outer peripheral surface 125 of the inductor, and a pair of wipers 200 may be installed in the inductor 120 . One wiper groove 126 or two or more wiper grooves 126 may be formed on the outer peripheral surface 125 , and the same number of wipers as the number of wiper grooves may be installed in the inductor.

The wiper 200 according to an embodiment includes a tube body 210 formed in a ring shape, and a coil spring 220 inserted into the tube body 210 over the entire length of the tube body. The tube body 210 is coupled to the outer peripheral surface 125 of the inductor. The tube body 210 is fitted to the outer circumferential surface 125 of the inductor (specifically, in the wiper groove 126 of the outer circumferential surface 125 ), and the wiper 200 is installed in the inductor 120 . The tube body 210 has a ring shape to fit into the wiper groove 126 . The coil spring 220 is disposed inside the tube body, and is not exposed to the outside of the tube body. The coil spring 220 is inserted into the tube body in a ring shape along the entire length of the tube body. The elasticity of the tube body 210 and the elasticity of the coil spring 220 become the elasticity of the wiper 200 , and the coil spring 220 applies a restoring force to the tube body 210 .

5 is a plan view illustrating a wiper according to an embodiment. Fig. 6 is a cross-sectional view of the wiper shown in Fig. 5; 7 is a cross-sectional view illustrating a state in which a wiper is installed in an inductor according to an embodiment, and FIG. 8 is a cross-sectional view illustrating a state in which the wiper is installed in the inductor and in contact with the sealer container according to an embodiment. Reference is made to FIGS. 5 to 8 .

The tube body 210 is fitted into the wiper groove 126 formed on the outer circumferential surface of the inductor. In a state where the tube body 210 is fitted to the outer circumferential surface of the inductor, the tube body 210 is in close contact with the inner circumferential surface 12 of the sealer container 10 in the outer radial direction (ROD), and is in contact with the outer circumferential surface 125 of the inductor. It adheres in the inner radial direction (RID). Accordingly, the tube body 210 can seal the outer circumferential surface 125 of the inductor and the inner circumferential surface 12 of the sealer container. The tube body 210 has an outer circumferential surface 125 of the inductor (specifically, the surface of the wiper groove) and an outer circumferential surface 211 in contact with the inner circumferential surface 12 of the sealer container. The outer peripheral surface 211 is the outer surface of the tube body, and takes a cylindrical shape bent into a ring shape. The tube body 210 may be made of a resin material. In a state in which the tube body 210 is elastically deformed in the outer radial direction (ROD) and the inner radial direction (RID) by the outer circumferential surface of the inductor and the inner circumferential surface of the sealer container, the outer circumferential surface 211 of the tube body is the outer circumferential surface 125 of the inductor and the inner circumferential surface 12 of the sealer container to seal the outer circumferential surface 125 of the inductor and the inner circumferential surface 12 of the sealer container. The resin material of the tube body may be, but is not limited to, a urethane resin, a silicone resin, or a PVC resin.

The tube body 210 has, on its inside, an insertion bore 212 formed over the entire length of the tube body in the circumferential direction CD. The insertion bore 212 is formed in the circumferential direction (CD) of the inductor, and may have the same diameter over the entire length of the tube body. The surface of the insertion bore 212 is the inner circumferential surface 213 of the tube body. In the free state of the wiper shown in FIG. 7 , the tube body 210 has a donut-shaped cross-sectional shape, and the width WT of the tube body in the outer radial direction (ROD) or the inner radial direction (RID) is the wiper groove. greater than the depth of (126).

The coil spring 220 is inserted into the insertion bore 212 over the entire length of the tube body 210 . The coil spring 220 is formed by winding a linear metal member in a coil shape. Accordingly, as shown in FIG. 5 , the coil spring 220 includes a wire diameter WD that is the diameter of the metal member, a spring pitch SP that is a distance between adjacent coil shapes, and the maximum in one coil shape. It has an outer diameter (OD) which is the diameter. According to one embodiment, as shown in FIG. 5 , the outer diameter OD of the coil spring 220 is smaller than the diameter ID of the insertion bore 212 . Accordingly, in the free state of the wiper, a gap IG is formed between the inner circumferential surface 213 (surface of the insertion bore) of the tube body and the outer surface of the coil spring 220 along the circumference of the insertion bore 212 . . For example, the outer diameter of the tube body 210 may be 23mm, the inner diameter (the diameter of the insertion bore 212) of the tube body 210 may be 19mm, the outer diameter (OD) of the coil spring 220 is 17mm can be

When the inductor 120 on which the wiper 200 is installed is inserted into the sealer container 10 , the outer peripheral surface 125 of the inductor and the inner peripheral surface 120 of the sealer container by the downward force DD applied to the inductor 120 . ), a reaction force acts in the outer radial direction (ROD) and the inner radial direction (RID). Accordingly, as shown in FIG. 8 , the tube body 210 is elastically deformed in the outer radial direction (ROD) and the inner radial direction (RID) by the outer circumferential surface 125 of the inductor and the inner circumferential surface 12 of the sealer container. . A portion of the tube body located outside of the insertion bore 212 may contract in an inner radial direction RID, and a portion of the tube body located inside the insertion bore 212 may contract in an outer radial direction ROD. can be Accordingly, the width WT of the tube body is reduced in the inner radial direction RID. Together with the elastic deformation of the tube body 210 , the coil spring 220 may be elastically deformed in an outer radial direction ROD and an inner radial direction RID. Also, the coil spring 220 may be elastically deformed in an upward direction UD and a downward direction DD. That is, along with the elastic deformation of the tube body 210 , the coil spring 220 may be elastically deformed in a shape slightly deformed from a circular shape to an elliptical shape. The coil spring 220 has a stronger rigidity than the tube body 210 made of a resin material. Due to the coil spring 220 , an amount by which the width WT of the tube body is reduced in the inner radial direction RID may be reduced.

The elastically deformed coil spring 220 applies an elastic force to the tube body 210 in an outer radial direction ROD and an inner radial direction RID. In addition, the elastically deformed tube body 210 exhibits an elastic force in the outer radial direction ROD. Therefore, the wiper 200 may strongly adhere to the inner circumferential surface 12 of the sealer container by the elastic force of the tube body 210 and the elastic force of the coil spring 220 .

In addition, the elastic force applied by the elastically deformed coil spring 220 acts as a restoring force for maintaining the original shape of the contracted tube body 210 . The coil spring 220 is disposed over the entire length of the tube body 210 , and the elastically deformed coil spring 220 exerts an elastic force on the tube body 210 in the outer radial direction (ROD) and the inner radial direction (RID). to authorize Accordingly, the coil spring 220 applies the restoring force in the outer radial direction ROD and the inner radial direction RID to the tube body 210 over the entire length in the circumferential direction of the tube body 210 .

Due to the configuration of the coil spring 220 described above, the shape restoration property of the tube body 210 is improved. Accordingly, the wiper according to an embodiment has the elastic force of the coil spring 220 to improve airtightness between the outer circumferential surface of the inductor and the inner circumferential surface of the sealer container. In addition, since the coil spring 220 applies a restoring force to the tube body 210, even when the sealer in the sealer container is compressed by the inductor for a long period of time, the tube body 210 not only maintains airtightness but also does not stick in a deformed state. does not Therefore, the wiper according to an embodiment may have improved airtightness and increased service life. Also, when the inductor is inserted into the new sealer container, the wiper 200 may be disposed between the outer peripheral surface of the inductor and the inner peripheral surface of the new sealer container while maintaining its original shape. Therefore, when using a new sealer container, the wiper 200 can be applied to the new sealer container with improved airtightness.

5 and 6, in the wiper 200 according to an embodiment, the tube body 210 has two cut ends located on opposite sides in the circumferential direction, and connects the two cut ends to the ring It may be formed in a shape. 9 is a perspective view illustrating a cut end of a tube body in a wiper according to an embodiment. See Figures 5, 6 and 9.

The tube body 210 has a first cut end 214 forming one end of the tube body, and a second cut end 215 forming the other end of the tube body in the circumferential direction CD. In addition, the tube body 210 has a joint portion 216 formed by connecting the first and second cut ends 214 and 215 to each other. The first and second cut ends 214 and 215 may be connected to each other by butt-joining the first and second cut ends 214 and 215 with the coil spring 220 inserted into the insertion bore 212 . have.

The coil spring 220 has two ends in its longitudinal direction, and the two ends of the coil spring 220 inserted into the insertion bore 212 are not coupled to each other. That is, the coil spring 220 is inserted into the insertion bore 212 with the two ends of the coil spring in contact with each other. According to one embodiment, in the free state of the coil spring 220 before being inserted into the insertion bore 212 , the coil spring 220 has a circumference from the first cut end 214 to the second cut end 215 . It has a length longer than the entire length of the tube body in the direction. In addition, in a state in which the coil spring 220 is inserted into the insertion bore 212 , the coil spring 220 is inserted into the insertion bore 212 in a state of being slightly compressed in the circumferential direction CD. Accordingly, the coil spring 220 in the wiper 200 is slightly preloaded in the circumferential direction CD, and elasticity of the coil spring 220 may be increased.

The tubular body of the wiper may be a cylindrical body having an insertion bore and made of one material. Alternatively, the tube body may be a cylindrical body having an insertion bore formed therein and having a layered structure made of two or more materials. 10 is a cross-sectional view illustrating a cross-sectional shape of a tube body of a wiper according to an embodiment. Referring to FIG. 10 , the tube body 210 includes a first layer 217A defining an insertion bore 212 , a second layer 217B formed to surround the first layer 217A, and a second The third layer 217C is formed to surround the layer 217B and forms the outer circumferential surface 211 of the tube body. The thickness of the first layer 217A is greater than the thickness of the third layer 217C. The first layer 217A and the third layer 217C may be formed of the same or different resin materials. The resin material of the first layer 217A and the third layer 217C may be, but is not limited to, PVC resin. The thickness of the second layer 217B is smaller than the thickness of the first layer 217A, and may be made of woven yarn using nylon. The second layer 217B made of woven yarn may reinforce the strength of the tube body 210 .

11 is a cross-sectional view showing another cross-sectional shape of the tube body of the wiper according to the embodiment. The outer peripheral surface 211 of the tube body 210 may have a plurality of uneven surfaces 218 extending in the circumferential direction. The uneven surfaces 218 may be arranged at equal intervals on the outer peripheral surface 211 . The concave-convex surface 218 provided on the outer circumferential surface 211 may improve airtightness between the inductor and the sealer container, and the sealer may be easily removed along the inner circumferential surface of the sealer container.

12A and 12B schematically show an example of manufacturing a wiper according to an embodiment. Referring to FIG. 12A , a tube body 210 constituting a wiper according to an embodiment is prepared. The tube body 210 has an overall length OL corresponding to the circumferential length of the inner circumferential surface of the sealer container to which the wiper according to an embodiment is applied. The tube body 210 is obtained from a tube material having a bore formed therein in the longitudinal direction. The tube material may have a straight shape or a circularly curved shape. A tube body 210 having an overall length OL is cut from the tube material. The cut tube body 210 may have a straight shape or a substantially circular shape. The cut tube body 210 has first and second cut ends 214 and 215 , and an insertion bore 212 is formed therein. In addition, a coil spring 220 having a length longer than the entire length OL of the tube body is prepared. The coil spring 220 is inserted into the insertion bore 212 of the tube body 210 over the entire length OL of the tube body 210 . Referring to FIG. 12B , the tube body 210 into which the coil spring 220 is inserted is bent into a ring shape, and the first and second cut ends 214 and 215 are connected by bonding. While the first and second cut ends 214 and 215 are joined, the coil spring 220 is compressed in the circumferential direction CD. When the first and second cut ends 214 and 215 are joined, the wiper 200 shown in FIG. 5 can be manufactured.

The circumferential length of the inner circumferential surface of the sealer container may vary, and the inductor inserted into the sealer container may have various diameters to correspond to various circumferential lengths of the sealer container. Also, depending on the type of sealer, the pressure for compressing the sealer into the inductor may vary, and necessary conditions may vary. According to one embodiment, by changing the specifications of the coil spring (spring wire diameter, spring pitch, etc.) without changing the specifications of the tube body (the material of the tube body, the size dimension of the tube body, etc.), the wiper is a sealer of various sizes It can be applied to the condition of the container or various airtightness.

As the wire diameter of the coil spring is larger, the strength of the coil spring may be increased, and higher airtightness may be secured. When coil springs having the same wire diameter have different spring pitches, various wipers having different strengths of the coil springs may be manufactured. For example, when coil springs having the same wire diameter have various spring pitches, the coil springs having a large spring pitch can have a larger amount of shrinkage, and a load when inserting the inductor into the sealer container can be reduced.

In relation to applying the wiper to various sealer containers by changing only the specification of the coil spring, refer to FIGS. 13A to 13C showing examples in which different coil springs are inserted into the same tube body.

The coil spring 220 shown in Fig. 13A has a wire diameter of about 0.8 mm and a spring pitch SP1. The coil spring 220 shown in FIG. 13B has a wire diameter of about 1.0 mm, and has a larger spring pitch SP2 than the spring pitch shown in FIG. 13A. The coil spring 220 shown in FIG. 13C has a wire diameter of about 1.2 mm, and has a spring pitch SP3 smaller than the spring pitch shown in FIG. 13B. The tube body 210 shown in FIGS. 13A to 13C may be made of the same material and structure, and may have the same or different sizes. As such, the coil spring 220 of the wiper may be any one coil spring selected according to the circumferential length of the inner circumferential surface of the sealer container from a plurality of coil spring groups having different wire diameters and different spring pitches. By changing only the specifications of the coil spring 220 without changing the specifications of the tube body 210 , the wiper of one embodiment can be applied to sealer containers of various sizes or conditions of various airtightness.

Although the technical spirit of the present disclosure has been described by examples shown in some embodiments and the accompanying drawings, it does not depart from the technical spirit and scope of the present disclosure that can be understood by those of ordinary skill in the art to which the present disclosure belongs It should be understood that various substitutions, modifications, and alterations within the scope may be made. Further, such substitutions, modifications, and alterations are intended to fall within the scope of the appended claims.

10; Sealer container, 11: sealer, 12: inner peripheral surface of the sealer container, 100: sealer pump, 110: pump housing, 111: sealer inlet, 112: sealer passage, 113: sealer outlet, 120: inductor, 125: outer peripheral surface of the inductor, 130: piston assembly, 140: motor, 200: wiper for sealer pump, 210: tube body, 212: insert bore, 214: first cut end, 215: second cut end, 216: abutment, 217A: first layer; 217B: second layer, 217C: third layer, 220: coil spring, CD: circumferential direction, UD: upward direction, DD: downward direction, ROD: outer radial direction, OL: overall length of tube body, OD: coil spring outside diameter of, ID: diameter of insertion bore, IG: clearance, WD: wire diameter of coil spring, SP: spring pitch of coil spring

Claims (9)

It is a wiper for the sealer pump disposed on the inductor inserted into the sealer container,
a tube body formed in a ring shape and coupled to the outer circumferential surface of the inductor and configured to seal the outer circumferential surface of the inductor and the inner circumferential surface of the sealer container, the tube body having an insertion bore formed in the circumferential direction of the inductor inside over the entire length;
and a coil spring inserted over the entire length in the state of being compressed in the circumferential direction into the insertion bore,
The tube body and the coil spring are elastically deformed in an outer radial direction and an inner radial direction by an outer circumferential surface of the inductor and an inner circumferential surface of the sealer container,
The outer diameter of the coil spring is smaller than the diameter of the insertion bore,
A gap is formed in the insertion bore between a surface of the insertion bore and an outer surface of the coil spring over the entire length along the circumference of the insertion bore,
wherein the coil spring is configured to apply a restoring force to the tube body in the outer radial direction and the inner radial direction over the entire length,
Wiper for sealer pump. delete delete delete According to claim 1,
The tube body is fitted into the wiper groove formed in the circumferential direction on the outer circumferential surface of the inductor,
Wiper for sealer pump. According to claim 1,
The tube body includes a first cut end forming one end of the tube body, a second cut end forming the other end of the tube body in the circumferential direction, and a junction portion to which the first and second cut ends are joined. have,
The coil spring has a length greater than the total length of the tube body from the first cut end to the second cut end,
The coil spring is inserted into the insertion bore in a state in which the two ends of the coil spring are abutted and compressed in the circumferential direction,
Wiper for sealer pump. 7. The method of claim 6,
The coil spring is any one coil spring selected according to the circumferential length of the inner circumferential surface of the sealer container from a plurality of coil spring groups having different wire diameters and different spring pitches,
Wiper for sealer pump. According to claim 1,
The tube body includes a first layer defining the insertion bore and made of a resin material, a second layer formed to surround the first layer and made of weaving, and a second layer formed to surround the second layer and made of a resin material. and having a third layer forming an outer circumferential surface of the tube body,
Wiper for sealer pump. It is a sealer pump that pumps and supplies the sealer from the sealer container,
An inductor inserted into the sealer container to compress the sealer in a downward direction, a sealer inlet formed in the inductor, a sealer passage extending upward from the sealer inlet, and a sealer passage formed in communication with the sealer passage to discharge the sealer A pump housing having a sealer outlet,
a piston assembly disposed to be movable in the upward and downward directions in the sealer passage and pumping the sealer in the sealer passage to the sealer outlet;
a motor coupled to the pump housing and configured to move the piston assembly in the upward and downward directions;
A wiper for the sealer pump of any one of claims 1 and 5 to 8 disposed on the inductor
sealer pump.

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